阅读说明：本技术 建筑外窗遮阳与保温一体化装置 (Building exterior window sunshade and heat preservation integrated device ) 是由 葛坚 左春雷 赵康 陈锦韬 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种建筑外窗遮阳与保温一体化装置。本发明包括框架、遮阳构件、保温构件和驱动机构；两根丝杆竖直布置于框架两侧,两根丝杆上端设置的两个第二从动伞齿轮之间通过两个第一从动伞齿轮连接有光轴,两个第一从动伞齿轮设置于光轴两端,第一从动伞齿轮和第二从动伞齿轮通过啮合连接；光轴上安装有与驱动轮连接的柱形齿轮；遮阳构件和保温构件通过格栅两端开有的通孔套设于两根丝杆上,保温构件下方通过拉绳连接有遮阳构件；遮阳构件上相邻两排格栅之间通过拉绳连接,保温构件上相邻两排格栅之间密封连接。本发明通过调节遮阳保温构件的间距,在日间可提供遮阳,夜间可利用构件内部腔体、构件与外窗间空气层构成两层空气间层提供保温。(The invention discloses a sunshade and heat preservation integrated device for an external window of a building. The invention comprises a frame, a sun-shading component, a heat-insulating component and a driving mechanism; two screw rods are vertically arranged on two sides of the frame, two second driven bevel gears arranged at the upper ends of the two screw rods are connected with an optical axis through two first driven bevel gears, the two first driven bevel gears are arranged at two ends of the optical axis, and the first driven bevel gears and the second driven bevel gears are connected in a meshing manner; a cylindrical gear connected with the driving wheel is arranged on the optical axis; the sun-shading component and the heat-preservation component are sleeved on the two screw rods through holes formed in two ends of the grating, and the lower part of the heat-preservation component is connected with the sun-shading component through a pull rope; two adjacent rows of grids on the sun-shading component are connected through pull ropes, and two adjacent rows of grids on the heat-insulating component are connected in a sealing manner. The invention can provide sun shading in the daytime by adjusting the distance between the sun shading and heat insulating members, and can form two air layers for heat insulation by utilizing the inner cavity of the member, the member and the air layer between the outer windows at night.)

1. A building external window sun-shading and heat-insulating integrated device is characterized by comprising a frame (1), a sun-shading component (421), a heat-insulating component (422) and a driving mechanism (2);

the driving mechanism (2) comprises two screw rods (22), an optical axis (21), a cylindrical gear (23), a first driven bevel gear (211) and a second driven bevel gear (221), the two screw rods (22) are vertically arranged on two sides of the frame (1), the two second driven bevel gears (221) arranged at the upper ends of the two screw rods (22) are connected with the optical axis (21) through the two first driven bevel gears (211), the two first driven bevel gears (211) are arranged at two ends of the optical axis (21), and the first driven bevel gears (211) are connected with the second driven bevel gears (221) through meshing; a cylindrical gear (23) connected with a driving wheel is arranged on the optical axis (21); threads with opposite rotation directions are arranged on the two screw rods (22), and no thread is arranged at the positions, close to the upper end and the lower end, of the two screw rods (22); the sun-shading component (421) and the heat-insulating component (422) are both composed of a plurality of rows of grids (42), each grid (42) is a foldable cuboid structure mainly composed of an upper horizontal plate (43), a lower horizontal plate (44), two folding supporting plates (45) and a sun-shading plate (41), the upper end and the lower end of each folding supporting plate (45) are respectively connected with the upper horizontal plate (43) and the lower horizontal plate (44) through hinges, the folding supporting plates (45) positioned on the front end face only keep the left side and the right side areas of the folding supporting plates (45), a sun-shading baffle (41) is arranged between the folding supporting plates (45) on the left side and the right side, and the upper end and the lower end of the sun-shading baffle (41) are respectively connected with the upper horizontal plate (; the folding support plate (45) is formed by hinging two folding plates, and the sun-shading baffle (41) is formed by hinging two sun-shading plates; after the grille (42) is unfolded, the folding support plate (45) is unfolded into a vertical plate, and the cross section of the sunshade baffle (41) is arranged in a triangular shape after being unfolded; after the grid (42) is folded, the folding support plate (45) and the sunshade baffle (41) are both folded into horizontal plates; the sun-shading component (421) and the heat-insulating component (422) are sleeved on the two screw rods (22) through holes (46) formed in the two sides of the upper horizontal plate (43) and the lower horizontal plate (44) of the grid (42), and the lower part of the heat-insulating component (422) is connected with the sun-shading component (421) through a pull rope; two adjacent rows of grids (42) on the sun-shading component (421) are connected through pull ropes, and two adjacent rows of grids (42) on the heat-insulating component (422) are connected in a sealing way; internal threads matched with the screw rod (22) in a threaded manner are arranged in through holes (46) of a lower horizontal plate (44) of the bottommost grid (42) of the sun-shading component (421) and the heat-insulating component (422).

2. The building exterior window sunshade and thermal insulation integrated device according to claim 1, further comprising a guide mechanism, wherein the frame (1) is through from front to back, the guide mechanism is arranged on both sides of the frame (1), the guide mechanism comprises sliding chutes (12) arranged on both sides of the frame (1), the sliding chutes (12) mainly comprise an inner baffle (121), an outer baffle (122) and a slide way (123) between the inner baffle and the outer baffle; the front end and the rear end of the grid (42) are provided with guide grooves (49) enabling the folding supporting plates (45) to be embedded into the sliding grooves (12), the outer baffle (122) is positioned on the outer side of the frame (1) and used for abutting against the unfolded folding supporting plates (45) to prevent the folding supporting plates from being folded, and the inner baffle (121) is embedded into the guide grooves (49).

3. The sunshade and thermal insulation integrated device for the external window of the building as claimed in claim 2, wherein the telescopic supporting members (13) are installed on the left and right sides of the frame (1), and the roller grooves for hiding the telescopic supporting members (13) are opened at the positions of the left and right sides of the frame (1) corresponding to the telescopic supporting members (13); the telescopic supporting component (13) comprises a transverse shaft (131), two short shafts (133) and rollers (132) sleeved on the transverse shaft (131), the two short shafts (133) are respectively fixed at two ends of a roller groove, the transverse shaft (131) is movably sleeved on the two short shafts (131) through mounting holes formed in two ends, the limiting of the transverse shaft (131) is realized through flanges at the tail ends of the short shafts (133), and the transverse shaft (131) is arranged perpendicular to the screw rod (22); the short shaft (133) is sleeved with a spring which is positioned between the frame (1) and the transverse shaft (131); the cross bar (131) and the roller (132) of the telescopic supporting part (13) are propped against the heat preservation component (422) through the supporting force of a spring, so that the heat preservation component (422) is prevented from falling when not being pulled by the sunshade component (421); when the telescopic supporting part (13) is stressed by pressure greater than the gravity of the heat preservation component (421), the cross rod (131) of the telescopic supporting part (13) is pushed into the roller groove along two short shafts (133) under the action of the pressure; the bottom end of the telescopic supporting component (13) is flush with the top end of the screw thread of the screw rod (22).

4. The integrated sunshade and thermal insulation device for the external window of the building as claimed in claim 2, wherein the length of the grille (42) is adapted to the left and right length of the frame (1), and the width of the external baffle (122) is the same as that of the folded support plate (45) on the front end face of the grille (42).

5. The integrated sunshade and thermal insulation device for the external window of the building as claimed in claim 1, wherein the sealing connection between two adjacent rows of grilles (42) on the thermal insulation member (422) is specifically as follows: the upper horizontal plate (43) and the lower horizontal plate (44) of each grid (42) are provided with sealing grooves (47), the lower horizontal plate (44) of the upper grid (42) corresponds to the sealing grooves (47) of the upper horizontal plate (44) of the lower grid (42) up and down, and the sealing connection between the two adjacent rows of grids (42) up and down is realized through sealing strips embedded in the sealing grooves (47).

6. The integrated device for sunshade and thermal insulation of the external window of the building as claimed in claim 1, wherein the upper end faces of the frame (1) and the thermal insulation member (422) are provided with U-shaped grooves (11), the openings of the U-shaped grooves (11) face upwards, and the open ends are contacted with the upper end face of the frame (1); the optical axis (21) is positioned in the U-shaped groove (11).

7. The integrated device for sun shading and heat preservation of the external window of the building as claimed in claim 1, wherein the front and rear end faces of the grille (42) are respectively provided with an inner lining (48) for sealing, and the folding support plate (45) and the sun shading plate (41) are uniformly arranged on the outer side face of the inner lining (48); the inner liner (48) is a gas impermeable flexible material.

8. The building exterior window sunshade and insulation integrated device according to claim 1, wherein the driving wheel (5) is connected to a motor, the motor drives the driving wheel (5) to rotate and simultaneously drives the optical axis (21) connected to the cylindrical gear (23) to rotate, and the optical axis (21) rotates and simultaneously drives the two screw rods (22) to rotate due to the engagement of the first driven bevel gear (211) and the second driven bevel gear (221) at the two ends of the optical axis (21).

9. The integrated sunshade and thermal insulation device for the external window of the building as claimed in any one of claims 1 to 8, wherein the device comprises an initial state, a sunshade state and a thermal insulation state;

initial state: the sun-shading component (421) and the heat-preservation component (422) are both contracted to the upper part of the frame (1), all the grids (42) are in a folded state, the grid at the bottommost part of the sun-shading component (421) is positioned on the screw rod (22) with the threads, and the heat-preservation component (422) is positioned on the screw rod (22) without the threads;

a sun shading state: the motor is started, the optical axis (21) rotates and simultaneously drives the two screw rods (22) to rotate, the grid (42) at the bottommost part of the sun-shading component (421) moves downwards along the screw rods and simultaneously drives the rest grids (42) in the sun-shading component (421) to move downwards until the grids (42) in all the sun-shading components (421) are unfolded, and the motor stops rotating;

at the moment, the bottommost grid of the sun-shading component (421) is positioned at the position where the lower end of the screw rod (22) is not provided with threads; the bottommost grid (42) of the heat preservation component (422) overcomes the spring supporting force of the telescopic supporting part (13) under the pulling force of the topmost grid (42) of the sun-shading component (421) and jumps to the position where the screw rod is provided with the thread;

and (3) heat preservation state: and continuously starting the motor, continuously moving the heat preservation member (422) downwards and unfolding under the drive of the rotary screw rod (22), stopping the motor when all the grids (42) on the heat preservation member (422) are unfolded, and tightly arranging all the grids (42) up and down at the moment without gaps among the grids (42).

Technical Field

The invention belongs to the technical field of buildings, and particularly relates to a sunshade and heat preservation integrated device for an external window of a building.

Background

The building external window is a main component for lighting and ventilation of a building, but the sun-shading effect and the heat-insulating property of the glass window are poor, so that the solar radiation heat entering the room in summer is more, the refrigeration energy consumption is high, and the heat dissipated in winter is more, and the heating energy consumption is high. The existing sun-shading device has single function and is difficult to give consideration to sun-shading and heat preservation of an external window. If the sun-shading effect of the louver is good, the louver cannot have a good heat preservation effect on the external window at night; the roller shutters and the honeycomb shutters have good sun shading effect, but have great influence on indoor lighting, and simultaneously have no obvious heat preservation effect on outer windows at night.

Compared with the existing sun-shading device, the sun-shading heat-insulating component of the device has the adjusting function, and the requirements of sun shading of the external window during the day and heat insulation at night can be met by different unfolding degrees. In the aspect of sun shading, the sun shading and heat preservation construction is utilized to effectively resist the direct radiation of the sun to enter the room; in the aspect of heat preservation, the heat preservation cavity and the two air interlayers formed between the heat preservation cavity and the outer window are utilized to provide heat preservation for the outer window; can be completely retracted when the sun shading or heat preservation is not needed, and does not influence the indoor lighting and sunshine.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a sunshade and heat preservation integrated device for an external window of a building, wherein sunshade can be provided in the daytime by adjusting the distance between sunshade and heat preservation components, and heat preservation can be provided by utilizing two heat preservation layers of an air layer between an internal cavity of the component, the component and the external window at night, so that the capability of the window in adapting to climatic environments in different seasons and different regions is enhanced.

The technical scheme adopted by the invention is as follows:

the invention comprises a frame, a sun-shading component, a heat-insulating component and a driving mechanism; the driving mechanism comprises two screw rods, an optical axis, a cylindrical gear, a first driven bevel gear and a second driven bevel gear, the two screw rods are vertically arranged on two sides of the frame, the two second driven bevel gears arranged at the upper ends of the two screw rods are connected with the optical axis through the two first driven bevel gears, the two first driven bevel gears are arranged at two ends of the optical axis, and the first driven bevel gears are connected with the second driven bevel gears through meshing; the optical axis is provided with a cylindrical gear connected with the driving wheel.

Threads with opposite rotation directions are arranged on the two screw rods, and the positions of the two screw rods, which are close to the upper end and the lower end, are not provided with the threads.

The sunshade component and the heat preservation component are all composed of a plurality of rows of grids, each grid is a foldable cuboid structure mainly composed of an upper horizontal plate, a lower horizontal plate, two folding supporting plates and a sunshade plate, the upper end and the lower end of each folding supporting plate are respectively connected with the upper horizontal plate and the lower horizontal plate through hinges, the folding supporting plates located on the front end faces only keep the left side and the right side regions of the folding supporting plates, sunshade baffles are arranged between the folding supporting plates on the left side and the right side, and the upper ends and the lower ends of the sunshade baffles are respectively connected with the upper horizontal plate and the.

The upper horizontal plate and the lower horizontal plate respectively form the upper end surface and the lower end surface of the cuboid structure, and the two folding supporting plates respectively form the front end surface and the rear end surface of the cuboid structure.

The folding support plate is formed by hinging two folding plates, and the sun-shading baffle is formed by hinging two sun-shading plates; after the grille is unfolded, the folding supporting plate is unfolded into a vertical plate, and the cross section of the unfolded sunshade baffle is arranged in a triangular shape; after the grid is folded, the folding supporting plate and the sunshade baffle are both folded into horizontal plates.

The sun-shading component and the heat-insulating component are sleeved on the two screw rods through holes formed in two sides of the upper horizontal plate and the lower horizontal plate of the grid, and the sun-shading component is connected below the heat-insulating component through a pull rope; two adjacent rows of grids on the sun-shading component are connected through pull ropes, and two adjacent rows of grids on the heat-insulating component are connected in a sealing way; and internal threads matched with the screw threads are arranged in the through holes of the lower horizontal plates of the grids at the bottommost parts of the sun-shading component and the heat-insulating component.

Still include guiding mechanism, link up around the frame, the frame left and right sides all is provided with guiding mechanism, and guiding mechanism is including setting up the spout in both sides around the frame, and the spout mainly comprises the slide between interior baffle, outer baffle and the interior outer baffle.

The guide way that makes folding backup pad embedding spout is all opened at both ends around the grid, and outer baffle is located the frame outside and is used for supporting the folding backup pad after the expansion and prevent it folding, and interior baffle embedding guide inslot.

The top of outer baffle and the screw thread top parallel and level of lead screw, the bottom parallel and level of interior baffle and U type groove.

The left side and the right side of the frame are both provided with telescopic supporting parts, and the positions of the left side and the right side of the frame corresponding to the telescopic supporting parts are provided with roller grooves for hiding the telescopic supporting parts; the telescopic supporting component comprises a transverse shaft, two short shafts and a roller sleeved on the transverse shaft, the two short shafts are respectively fixed at two ends of a roller groove, the transverse shaft is movably sleeved on the two short shafts through mounting holes arranged at two ends, the limiting of the transverse shaft is realized through a flange at the tail end of the short shaft, and the transverse shaft is arranged perpendicular to the screw rod; the spring is sleeved on the short shaft and is positioned between the frame and the transverse shaft.

The cross bar and the roller of the telescopic supporting part are propped against the heat-insulating component through the supporting force of the spring, so that the heat-insulating component is prevented from falling down when not being pulled by the sun-shading component; when the telescopic supporting part is subjected to pressure greater than the gravity of the heat preservation component, the cross rod of the telescopic supporting part is pushed into the roller groove along the two short shafts under the action of the pressure.

The bottom height of the telescopic supporting component is flush with the top height of the screw thread of the screw rod.

The length of the short shaft does not exceed the notch position of the roller groove.

The length of the grating is matched with the left length and the right length of the frame, and the width of the outer baffle is the same as that of the folding support plate on the front end face of the grating.

The mode of sealing connection between two adjacent rows of grids on the heat-insulating component specifically comprises the following steps: the upper horizontal plate and the lower horizontal plate of the grating are provided with sealing grooves, the lower horizontal plate of the upper row of grating vertically corresponds to the sealing grooves of the upper horizontal plate of the lower row of grating, and the sealing connection between the upper and lower adjacent rows of gratings is realized through the sealing strips embedded in the sealing grooves.

The upper end surfaces of the frame and the heat-insulating member are provided with U-shaped grooves, the openings of the U-shaped grooves are upward, and the opening ends of the U-shaped grooves are in contact with the upper end surface of the frame; the optical axis is located U type inslot.

The front end face and the rear end face of the grid are provided with linings for sealing, and the folding supporting plate and the sun shield are uniformly arranged on the outer side faces of the linings; the lining is made of airtight soft material, so that each sun-shading heat-insulating component forms a closed cavity when being unfolded.

The driving wheel is connected with the motor, the motor drives the driving wheel to rotate and simultaneously drives the optical shaft connected with the cylindrical gear to rotate, and the optical shaft drives the two screw rods to rotate simultaneously due to the fact that the first driven bevel gears and the second driven bevel gears at the two ends of the optical shaft are meshed.

The device comprises an initial state, a sun-shading state and a heat preservation state.

Initial state: sunshade component and heat preservation component all contract to frame upper portion, and all grids are in fold condition, and the grid of sunshade component bottommost is located and is equipped with the screw rod of screw thread, and the heat preservation component is located not to be equipped with the screw rod of screw thread.

A sun shading state: the motor is started, the optical axis rotates and simultaneously drives the two screw rods to rotate, the grid at the bottommost part of the sun-shading component moves downwards along the screw rods and simultaneously drives the rest grids of the sun-shading component to move downwards, and the motor stops rotating until the grids of all the sun-shading components are unfolded;

at the moment, the bottommost grid of the sun-shading component is positioned at the position where the thread is not arranged at the lower end of the screw rod; the bottommost grid of the heat preservation component overcomes the spring supporting force of the telescopic supporting component under the tensile force action of the topmost grid of the sun-shading component and jumps to the position where the screw rod is provided with the threads.

And (3) heat preservation state: the motor continues to be started on the basis of the sunshade state, the heat preservation component continues to move downwards and expand under the drive of the rotary screw rod, the motor stops rotating when all the grids on the heat preservation component expand, all the grids are closely arranged up and down at the moment, and no gap is reserved between the grids.

The motor rotates reversely, the sun-shading component and the heat-insulating component both move upwards under the drive of the bottommost grille, all the grilles are folded, and the initial state is recovered.

The invention has the beneficial effects that:

under the drive of the driving mechanism, partial sun-shading heat-preservation components can be vertically arranged according to a certain distance, and at the moment, sun-shading boards on the components reflect sunlight and the components form horizontal sun shading; all the sun-shading heat-insulating members can be vertically and fully distributed in the frame, at the moment, the heat-insulating cavities in the members are unfolded, and the members are completely overlapped to form two layers of heat-insulating layers of air layers among the inner cavities of the members, the members and the outer window, so that heat insulation is provided for the outer window; the device can satisfy building exterior window sunshade and the dual demand of heat preservation night in daytime, reasonable in design, convenient to use.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of a sunshade state according to an embodiment of the present invention.

Fig. 3 is a schematic view of a heat preservation state according to an embodiment of the present invention.

FIG. 4 is a schematic structural view of a sun-shading and heat-insulating member according to an embodiment of the present invention.

FIG. 5 is a schematic front view of the state of the non-sunshade insulating layer according to the embodiment of the present invention.

FIG. 6 is a schematic top view of the state without the sun-shading and heat-insulating layer according to the embodiment of the present invention.

Fig. 7 is a schematic view of a guide rail structure according to an embodiment of the present invention.

In the figure: 1-frame, 11-U-shaped groove, 12-chute, 121-inner baffle, 122-outer baffle, 123, slideway, 2-driving mechanism, 21-optical axis, 211-first driven bevel gear, 22-screw rod, 221-second driven bevel gear, 23-cylindrical gear, 3-sun-shading heat-insulating layer, 4, sun-shading heat-insulating member, 41-sun-shading baffle, 42-grid, 43-upper horizontal plate, 44-lower horizontal plate, 45-folding supporting plate, 46-through hole, 47-sealing device, 48-inner liner, 5-driving wheel, 49-guide groove, 13-telescopic supporting component, 131-cross bar, 132-roller, 133-short shaft, 421-sun-shading member, 422-heat-insulating member

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in figure 1, the invention comprises a frame 1, a U-shaped groove 11 is arranged at the top in the frame 1, a driving mechanism 2 is arranged in the U-shaped groove 11, guide mechanisms are arranged at two sides in the frame 1, a sun-shading heat-insulating layer 3 is connected in the guide mechanisms in a sliding mode, the sun-shading heat-insulating layer 3 is formed by splicing a heat-insulating member and a sun-shading member up and down, and a sun-shading heat-insulating member 4 comprises a sun-shading member and.

As shown in fig. 4, the grill 42 includes an upper/lower horizontal plate 43/44 and a folding support plate 45 hingedly connected to the upper/lower horizontal plate 43/44, the folding support plate 45 being formed of two hingedly engaged plates. The grill 42 is foldable and unfoldable in a vertical direction. The grid includes first initiative grid, second initiative grid and a plurality of driven grid, the lower horizontal plate 44 of initiative grid is through taking screwed through-hole 46 and lead screw 22 threaded connection, goes up horizontal plate 43 through glossy through-hole 46 and lead screw 22 sliding connection, the last horizontal plate 23 and the lower horizontal plate 24 of driven grid all through glossy round hole 26 and lead screw 22 sliding connection. The grids at the bottommost parts of the sun-shading component and the heat-insulation component are respectively a first driving grid and a second driving grid, the first driving grid, the second driving grid and a driven grid between the two driving grids are connected through pull ropes, and the grids between the sun-shading components are in sealing connection. The grille 42 also comprises a sunshade baffle 41 arranged in the middle of the front end face, and the sunshade baffle 41 is formed by hinging two thin plates with equal width;

as shown in fig. 5, the driving mechanism 2 includes two lead screws 22, the lead screws 22 are symmetrically disposed at the middle of the optical axis 21, the two lead screws 22 are engaged with the first driven bevel gears 211 at both ends of the optical axis 21 through the second driven bevel gear 221 coaxially mounted at the top, the first driven bevel gear 211 is coaxially mounted with the optical axis 21, the second driven bevel gear 221 is coaxially mounted at the top end of the lead screw 22, and the first driven bevel gear 211 and the second driven bevel gear 221 are the same gear. The two symmetrically arranged screw rods 22 rotate at the same rotating speed through the mutual matching of the bevel gears.

As shown in fig. 6, the driving mechanism 2 includes an optical axis 21 horizontally disposed, a lead screw 22 vertically disposed, and a cylindrical gear 23, the optical axis 21 is disposed in the U-shaped groove 11 through a fixing seat, the upper and lower ends of the lead screw 22 are connected to the frame 1 through the fixing seat, the cylindrical gear 23 is engaged with the driving wheel 5, and the driving wheel 5 is connected to a driving motor disposed in the U-shaped groove 11.

As shown in fig. 7, the middle of the screw rods 22 is provided with threads, the direction of the threads of the two screw rods 22 is selected from positive rotation and negative rotation, the height from the bottom end of the threads to the upper edge of the bottom of the frame 1 is equal to the unfolded thickness of the first active grille, and the height from the top end of the threads to the lower edge of the top of the frame 1 is equal to the folded thickness of all the grills.

As shown in fig. 5 and 7, the left and right sides of the frame 1 are provided with guide mechanisms, each guide mechanism comprises a sliding chute 12 arranged on the front and rear sides of the frame 1, and each sliding chute 12 mainly comprises an inner baffle 121, an outer baffle 122 and a sliding way 123 between the inner baffle and the outer baffle; the front and rear ends of the grille 42 are provided with guide grooves 49 for inserting the folding support plates 45 into the sliding grooves 12, the outer baffle 122 is positioned outside the frame 1 and used for pushing against the unfolded folding support plates 45 to prevent the folding, and the inner baffle 121 is inserted into the guide grooves 49. The top end of the outer baffle 122 is flush with the top end of the screw thread of the screw rod 22, and the inner baffle 121 is flush with the bottom end of the U-shaped groove 11.

As shown in fig. 5 and 7, the telescopic supporting members 13 are mounted on both left and right sides of the frame 1, and roller grooves for hiding the telescopic supporting members 13 are formed at positions on both left and right sides of the frame 1 corresponding to the telescopic supporting members 13; the telescopic supporting component 13 comprises a transverse shaft 131, two short shafts 133 and a roller 132 sleeved on the transverse shaft 131, the two short shafts 133 are respectively fixed at two ends of a roller groove, the transverse shaft 131 is movably sleeved on the two short shafts 131 through mounting holes arranged at two ends, the limiting of the transverse shaft 131 is realized through a flange at the tail end of the short shaft 133, and the transverse shaft 131 is arranged perpendicular to the screw rod 22; the short shaft 133 is sleeved with a spring which is positioned between the frame 1 and the transverse shaft 131;

the cross bar 131 and the roller 132 of the telescopic supporting part 13 are propped against the heat preservation member 422 through the supporting force of the spring, so that the heat preservation member 422 is prevented from falling when not being pulled by the sun-shading member 421; when the telescopic supporting part 13 is pressed by a pressure greater than the gravity of the heat preservation member 421, the cross bar 131 of the telescopic supporting part 13 is pushed into the roller groove along the two short shafts 133 under the action of the pressure.

The whole device can only drive the whole structure to operate through one motor, a guide mechanism and a driving mechanism 2 are arranged in the frame 1, so that the sunshade heat-insulating layer 3 connected with the driving mechanism 2 is opened or folded, and two synchronous motors can be arranged to drive the two screw rods 22 to synchronously operate to drive the whole device to operate.