External sunshade device capable of automatically adjusting angles of shutters

Abstract

The invention relates to the technical field of building equipment and building energy conservation, in particular to an external sunshade device capable of automatically adjusting a shutter angle, which comprises at least two vertical keels made of a metal material with a high thermal expansion coefficient, one end of each vertical keel is a fixed end, and the other end of each vertical keel is a free end; the limiting sliding block is fixedly arranged at the free end of the vertical keel and used for restraining the horizontal displacement of the free end of the vertical keel and allowing the free end of the vertical keel to freely stretch out and draw back in the vertical direction; the vertical keel absorbs heat and expands to generate mechanical displacement, the mechanical displacement is amplified through the lever assembly to drive the shutter blades to be closed, full-automatic adjustment of the sunshade angle is achieved, resetting depends on gravity when no illumination exists, and in the whole process, the sunshade angle is adjusted, and the sunshade effect is good. The thermal expansion driving effect, the lever amplification effect, the blade linkage effect and the limiting constraint effect cooperate, and the unification of efficient sunshade, wind resistance stability and building facade attractiveness is achieved under the zero-energy-consumption condition.

Description

Technical Field

[0001] The present invention relates to the technical field of external sunshade devices for automatically adjusting the angle of louvers, and particularly relates to an external sunshade device for automatically adjusting the angle of louvers. Background Art

[0002] With the improvement of building energy-saving indicators and the gradual recognition of building external sunshade products by industry insiders, more and more building external sunshade products have been successfully applied to fashionable energy-saving buildings. However, due to their complex structures, high construction costs and maintenance costs of high-quality external sunshade products make it difficult to popularize external sunshade facilities.

[0003] The existing methods for adjusting the blade angle of movable louver external sunshades are divided into three types: manual adjustment, electric adjustment, and full-automatic adjustment. For manual adjustment and electric adjustment of movable louver external sunshades, the actual user changes the tilt angle of the louvers through a manual rocker or an electric button to achieve the desired sunshade effect. The disadvantage is that the desired sunshade angles of each actual user may be different, thus affecting the aesthetics of the building facade. For full-automatic adjustment of movable louver external sunshades, automatic control devices such as sunlight sensors, regulators, and electric actuators need to be set up, increasing the manufacturing, installation, and maintenance costs. If the existing liftable louver sunshade curtain is used outside the window, not only the manufacturing, installation, and maintenance costs are relatively high, but also the impact on the building facade during actual use is greater, and it is impossible to achieve the integration of sunshading and building decoration. The purpose of this project is to develop an external sunshade device for automatically adjusting the angle of louvers to solve the above problems. Summary of the Invention

[0004] In view of at least one of the above technical problems, the present invention provides an external sunshade device for automatically adjusting the angle of louvers, adopting the following technical solutions to solve the problems raised in the above background art.

[0005] According to one aspect of the present invention, there is provided an external sunshade device for automatically adjusting the angle of louvers, comprising:

[0006] At least two vertical keels, the vertical keels are made of a metal material with a high coefficient of thermal expansion, and one end of the vertical keel is a fixed end and the other end is a free end;

[0007] A limit slider, fixedly arranged at the free end of the vertical keel, for restricting the horizontal displacement of the free end of the vertical keel and allowing its vertical free expansion and contraction;

[0008] A lever assembly, including a lever, a fulcrum seat, and a fulcrum shaft, the power arm of the lever is in contact connection with the lower end of the vertical keel, and the resistance arm of the lever is connected to the louver blade through an adjustable push rod; and

[0009] A plurality of louver blades, all of the plurality of louver blades are connected to a blade linkage rod and rotate synchronously through the blade linkage rod. One of the plurality of louver blades is hingedly connected to an adjustable push rod and is driven by the adjustable push rod to adjust the tilt angle. The remaining louver blades are linked to the louver blade driven by the adjustable push rod through the blade linkage rod.

[0010] The present invention is further configured such that the surface of the vertical keel is coated with a heat-absorbing coating.

[0011] The present invention is further configured such that the upper end of the vertical keel is fixedly connected to an upper connecting steel plate, the limiting slider is fixedly connected to a lower connecting steel plate, and rear steel plates are respectively fixedly connected to one ends of the upper connecting steel plate and the lower connecting steel plate.

[0012] The present invention is further configured such that mounting holes are provided on the rear steel plate for fixing to a building wall through expansion bolts, and an annular sealant guide groove and a sealant injection hole are provided on the rear steel plate for injecting sealant to prevent rainwater penetration.

[0013] The present invention is further configured such that a chute is provided on the limiting slider, and the lower end of the vertical keel is inserted into the chute.

[0014] The present invention is further configured such that the chute is L-shaped, and the structure of the lower end of the vertical keel is adapted to the L-shaped structure.

[0015] The present invention is further configured such that a fulcrum seat is provided at one end of the lever close to the vertical keel;

[0016] A waist-shaped hole is provided on the fulcrum seat, a screw hole is provided on the limiting slider, and the fulcrum seat is connected to the screw hole on the limiting slider through the waist-shaped hole for adjusting the position of the fulcrum seat on the limiting slider to change the length of the power arm of the lever.

[0017] The present invention is further configured such that the adjustable push rod is a telescopic structure with a lockable length;

[0018] The adjustable push rod includes two support rods. One ends of the two support rods are respectively provided with a screw hole and a long hole. The screw hole and the long hole of the two support rods are connected by screws. After the two support rods are connected into an adjustable push rod, its two ends are respectively hinged to the lever and the louver blade.

[0019] The present invention is further configured such that right-angled flanges are provided on the short sides on both sides of the louver blade. A rotating shaft hole, a linkage hole and a force-receiving hole are provided on the right-angled flange. The linkage hole and the force-receiving hole are respectively located on both sides of the rotating shaft hole, and the force-receiving hole is close to the rotating shaft hole. The louver blade is hinged to the vertical keel through the rotating shaft hole, the louver blade is hinged to the blade linkage rod through the linkage hole, and one of the plurality of louver blades is hinged to the adjustable push rod through the force-receiving hole.

[0020] The present invention is further configured such that small-angle (obtuse angle) flanges are provided on the long sides of both sides of the louver blades.

[0021] The present invention has the following technical effects:

[0022] In view of the disadvantages of the prior art, the present invention proposes a completely new solution. Through the heat absorption and expansion of the vertical keel to generate mechanical displacement, which is amplified by the lever assembly and then drives the louver blades to close, the present invention realizes the full-automatic adjustment of the shading angle. When there is no light, it relies on gravity to reset. In the whole process, the heat expansion driving effect, the lever amplification effect, the blade linkage effect and the limit constraint effect cooperate with each other to achieve the unity of high-efficiency shading, wind resistance stability and building facade beauty under the condition of zero energy consumption.

[0023] Moreover, the structure of the present invention is simple, the installation is fast, it is suitable for factory production, which can greatly reduce the construction cost. And it can automatically adjust the angle of the blades according to the intensity of sunlight without consuming any energy, effectively preventing direct sunlight from entering the room, basically requiring no maintenance, and having extremely low usage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 is a perspective view of the present invention;

[0026] Figure 2 is of the present invention Figure 1 the enlarged schematic structural view at A in

[0027] Figure 3 is a front view of the present invention;

[0028] Figure 4 is in the present invention Figure 3 the cross-sectional view taken along B-B in

[0029] Figure 5 is in the present invention Figure 4 the enlarged schematic structural view at C in

[0030] Figure 6 is a perspective view of the lever assembly in the present invention;

[0031] Figure 7 is a perspective view of the limit slider in the present invention.

[0032] Reference Signs:

[0033] 1 - Vertical keel; 2 - Upper connecting steel plate; 3 - Lower connecting steel plate; 4 - Rear steel plate; 5 - Louver blade; 51 - Rotating shaft hole; 52 - Linking hole; 53 - Stress hole; 6 - Blade linkage rod; 7 - Adjustable push rod; 8 - Limit slider; 81 - Screw hole; 82 - Slide groove; 9 - Lever assembly; 91 - Lever; 92 - Fulcrum seat; 93 - Fulcrum shaft. Specific embodiments

[0034] To make the above - mentioned objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific embodiments of the present application is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] In this embodiment of the present invention, as Figures 1-7 shown, an external sun - shading device for automatically adjusting the louver angle is provided, including:

[0036] At least two vertical keels 1, which are made of a metal material with a high coefficient of thermal expansion, and the upper end thereof is a fixed end provided with an installation hole for fixing to the upper connecting plate, and the lower end thereof is a free end provided with a notch for contacting the power arm of the lever. Specifically, the vertical keel 1 is made of an aluminum alloy material with light weight, high strength, and a large coefficient of thermal expansion; more specifically, it is directly made of unequal - angle aluminum.

[0037] A limit slider 8, which is welded and fixed to the lower connecting plate and slidably nested on the free end of the vertical keel 1, is used to restrict the horizontal displacement of the free end of the vertical keel 1 and allow its vertical free expansion and contraction.

[0038] A lever assembly 9, including a lever 91, a fulcrum seat 92, and a fulcrum shaft 93. The power arm of the lever 91 is in contact connection with the notch at the free end of the vertical keel 1. In the case of no sunlight, by adjusting the installation height of the vertical keel 1, when the lever 91 is in a horizontal position, the power arm of the lever 91 just contacts the free end of the vertical keel 1. The resistance arm of the lever 91 is connected to the louver blade 5 through an adjustable push rod 7; and

[0039] Multiple louver blades 5, multiple louver blades 5 are all connected to the blade linkage rod 6 and rotate synchronously through the blade linkage rod 6. One of the multiple louver blades 5 is hinged to the adjustable push rod 7 and is driven by the adjustable push rod 7 to adjust the tilt angle, and the remaining louver blades 5 are linked with the louver blade 5 driven by the adjustable push rod 7 through the blade linkage rod 6.

[0040] It should be noted that the vertical keel 1 of the high coefficient of thermal expansion metal material is sensitive to temperature changes. When the sun shines on the vertical keel 1, its volume expands and displacement occurs when heated. Since one end of the vertical keel 1 is fixed, the other end will inevitably elongate from the free end. A limit slider 8 is provided at the free end of the vertical keel 1. The limit slider 8 ensures that the elongation displacement direction of the vertical keel 1 is vertical, enabling the expansion force to be effectively transmitted to the lever 91. After the driving force arm of the lever 91 is pushed by thermal expansion and amplified by the lever assembly 9, it drives the louver blades 5 to rotate by an appropriate angle or even close. Specifically, the small displacement generated by the thermal expansion of the vertical keel 1 (but with a great acting force, which is the same principle as that if no expansion joint is reserved for ordinary train tracks, the tracks will be bent in summer) is, through the lever principle of the lever assembly 9, when the resistance arm of the lever 91 is much larger than the driving force arm, a large displacement will be generated at the resistance arm, so as to realize a large rotation angle of the louver blades 5. At the same time, the blade linkage rod 6 ensures the synchronous movement of multiple louver blades 5, so as to achieve the synchronous rotation and shielding of multiple louver blades 5 for the window and realize the sunshade function. When there is no light, the temperature of the vertical keel 1 drops, and when its volume gradually shrinks, it no longer presses and pushes the lever assembly 9, and the louver blades 5 reset by gravity, realizing the automatic adjustment function of the external sunshade device without additional energy, which not only simplifies the structure, reduces the cost, but also requires no maintenance.

[0041] It should be further noted that the coefficient of thermal expansion of aluminum alloy is about 23×10 -6 / ℃. Therefore, the lower end of the vertical keel 1 generally not less than 1.5 meters can elongate downward by more than 1 mm. After the moving distance is amplified by the lever 91, the resistance point of the lever 91 can move upward by about 20 mm, which is sufficient to make the louver blades 5 rotate by a large enough angle.

[0042] The movable louver external sunshade made by the present invention has similar louver blades 5 and vertical keels 1 to the existing movable louver external sunshade, but it does not have the manual or electric device for driving the blade rotation of the ordinary movable louver external sunshade, nor the sunlight sensor, regulator, and electric actuator configured for the fully automatic movable sunshade. Instead, it only utilizes the physical property of thermal expansion and contraction of the vertical keel 1 itself to push a lever 91, thereby realizing the function of changing the angle of the louver blades 5. Therefore, the present invention is much simpler than the prior art, does not require power consumption, and is not afraid of sunlight, wind, and rain.

[0043] In this embodiment, in order to further increase the heating rate of the vertical keel 1 under sunlight irradiation, the surface of the vertical keel 1 is coated with an endothermic coating.

[0044] Specifically, the surface of the vertical keel 1 can be painted in a dark color with a high heat absorption rate. For example, the surface is anodized and coated with black matte paint, so that while serving as a structural material, the vertical keel 1 can be sensitive enough to absorb the heat of sunlight, acting as a "sensor" and a driving force generator.

[0045] It should be noted that the vertical keel 1 can also be coated with a heat-absorbing coating only on the side facing the sunlight, while maintaining the original color of the aluminum metal or coating it with white or light-colored reflective paint on the surface that cannot be directly irradiated by the sunlight.

[0046] In this embodiment, as Figures 1-4 shown, to achieve a stable connection between the device and the building wall, the upper end of the vertical keel 1 is fixed to the upper connecting steel plate 2, the limit slider 8 is fixedly connected to the lower connecting steel plate 3, and one end of the upper connecting steel plate 2 and the lower connecting steel plate 3 are respectively fixedly connected with a rear steel plate 4.

[0047] Specifically, the upper connecting steel plate 2, the lower connecting steel plate 3, the rear steel plate 4 and the limit slider 8 are all made of ordinary low-carbon steel plates. The vertical keel 1 is bolted to the upper connecting steel plate 2 through the mounting holes at its end, and the lower end of the vertical keel 1 is provided with a notch that contacts the power arm of the lever 91, which can be used to more stably contact and connect with the lever 91. The upper connecting steel plate 2 and the lower connecting steel plate 3 are both connected to the rear steel plate 4 by welding, and the limit slider 8 is also welded to the lower connecting steel plate 3. This connection method forms a stable installation structure. The upper connecting steel plate 2 stabilizes the upper end of the vertical keel 1, the lower connecting steel plate 3 ensures the stability of the limit slider 8, and the rear steel plate 4 connects the entire device to the building wall. Through this connection, the stress during the use of the device is dispersed, enabling the device to be firmly installed on the building wall, enhancing the overall stability, effectively resisting external forces such as wind and vibration, ensuring that there will be no shaking, falling off, etc. during long-term use, guaranteeing the use safety, and providing a reliable basis for the normal operation of the device.

[0048] It should be noted that if the building itself is a steel keel glass curtain wall structure, the upper connecting steel plate 2 and the lower connecting steel plate 3 can be directly welded to the vertical keel of the curtain wall without being fixed and installed through the rear steel plate 4.

[0049] In this embodiment, as Figure 3 shown, in order to improve the wind resistance performance and not damage the waterproofing of the wall, the rear steel plate 4 is provided with mounting holes for fixing to the building wall through expansion bolts, and a circular glue guide groove and a glue injection hole communicating with the guide groove are provided around the mounting hole on the side of the rear steel plate close to the wall, for injecting sealant to prevent rainwater from entering the expansion bolt holes on the wall.

[0050] Specifically, when injecting sealant through the sealant injection hole, the sealant will flow into the annular sealant guide groove and fill the gap between the steel plate around the mounting hole and the wall, forming a waterproof barrier. In actual use, when rainwater contacts the rear steel plate 4, the sealing layer formed by the sealant can effectively prevent rainwater from entering the expansion bolt hole through the gap between the wall surface and the rear steel plate 4 and penetrating into the interior of the building wall. This avoids the erosion of the building structure by rainwater, protects the waterproof structure of the building wall, and ensures the waterproof performance of the building and the device.

[0051] In this embodiment, as Figure 2 and Figure 7 shown, the limiting slider 8 is provided with a chute 82, and the lower end of the vertical keel 1 is inserted into the chute 82.

[0052] It should be noted that the purpose of the above design is to prevent the lower end of the vertical keel 1 from swinging under the action of wind force or other external forces, but it does not limit the free expansion and contraction of the lower end of the vertical keel 1 in the vertical direction during the process of thermal expansion and contraction. This ensures that the force generated by the thermal expansion of the vertical keel 1 can be accurately transmitted to the lever assembly 9, avoiding the dispersion or transmission deviation of the force caused by horizontal shaking, ensuring the accuracy and stability of the adjustment angle of the louver blades 5, making the sunshade device operate reliably, being able to effectively adjust the louver angle according to the light conditions, and the restriction of the chute 82 on the horizontal movement of the vertical keel 1 can ensure that the vertical keel 1 does not swing with the wind under the action of wind force.

[0053] In this embodiment, the chute 82 is L-shaped, and the structure of the lower end of the vertical keel 1 is adapted to the L-shaped structure.

[0054] The vertical keel 1 can be made of unequal-leg angle aluminum. In order to adapt to the L-shaped structure of the unequal-leg angle aluminum, the chute 82 is designed as an L-shaped structure with dimensions and structure adapted to the vertical keel 1. It should be further noted that the shape of the lower end of the vertical keel 1 is not limited to L-shaped, and it can also be a square column shape, then the chute 82 can be designed as a square hole to be adapted to it.

[0055] In this embodiment, as Figure 1 、 Figure 2 、 Figure 4 and Figure 6 shown, the fulcrum seat 92 is arranged at one end of the lever 91 close to the vertical keel 1, and the fulcrum seat 92 is connected to the lever 91 through a fulcrum shaft 93;

[0056] The fulcrum seat 92 is provided with a waist-shaped hole 921, and the limiting slider 8 is provided with a screw hole 81. The fulcrum seat 92 is connected to the screw hole 81 on the limiting slider 8 through the waist-shaped hole 921, for adjusting the position of the fulcrum seat 92 on the limiting slider 8 to change the length of the power arm of the lever 91 (the length of the power arm is the distance from the force application point to the center of the fulcrum shaft 93), that is, to change the position of the force application point on the power arm.

[0057] It should be noted that since the magnification of the lever 91 depends on the ratio of the power arm to the resistance arm, by adjusting the left - right movement of the fulcrum seat 92 on the limit slider 8, the displacement magnification of the lever assembly 9 can be flexibly changed. In actual use scenarios, different lighting angles and intensities may have different requirements for the rotation angle of the louver blades 5. At this time, the position of the fulcrum shaft 93 can be adjusted to meet the requirements, improving the applicability of the sunshade device, enabling it to better adapt to diverse lighting conditions and achieve more precise sunshade adjustment.

[0058] In this embodiment, as Figure 4 and Figure 5 shown, the adjustable push rod 7 is a telescopic structure with a lockable length;

[0059] The adjustable push rod 7 includes two support rods. One end of each of the two support rods is provided with a screw hole and a long hole respectively. The screw holes and long holes of the two support rods are connected by screws. After the two support rods are connected into an adjustable push rod 7, its two ends are respectively hinged to the lever 91 and the louver blade 5.

[0060] During the installation process, loosen the screws. When the screws are loosened, the two support rods can slide within the range of the long holes, so that the two support rods can be flexibly telescoped to adjust the length, enabling it to adapt to different installation spaces and the pushing requirements of the lever assembly 9, ensuring that the louver blade 5 can be installed in a suitable initial position. After adjusting the length, tighten the screws to lock the push rod. During use, it ensures that the adjustable push rod 7 can stably transmit the power of the lever 91 to the louver blade 5, ensuring the accuracy and reliability of the adjustment angle of the louver blade, enabling the sunshade device to stably and precisely achieve the louver angle adjustment function.

[0061] It should be noted that to avoid conflicts between the adjustable push rod 7 and the rotation axis of the louver blade 5, an arc - shaped structure that can avoid the blade rotation axis is provided at one end of the adjustable push rod 7 connected to the louver blade 5.

[0062] In this embodiment, as Figure 1 and Figure 4 shown, right - angled flanges are provided on the two short sides of the louver blade 5. A rotating shaft hole 51, a linkage hole 52, and a stress hole 53 are provided on the right - angled flanges. The linkage hole 52 and the stress hole 53 are respectively located on both sides of the rotating shaft hole 51, and the stress hole 53 is close to the rotating shaft hole 51. The louver blade 5 is connected to the vertical keel 1 through the rotating shaft hole 51 by a set - screw (the set - screw also serves as a rotating shaft). The louver blade 5 is hinged to the blade linkage rod 6 through the linkage hole 52, and one of the multiple louver blades 5 is hinged to the adjustable push rod 7 through the stress hole 53.

[0063] It should be noted that through the structure of the rotating shaft holes 51, linkage holes 52 and force-bearing holes 53 provided on the right-angle folds of the louver blades 5, reliable connection with the vertical keel 1, blade linkage rods 6 and adjustable push rods 7 can be achieved. The rotating shaft holes 51 provide the rotation axis for the louver blades 5. The vertical keel 1 is provided with blade mounting shaft holes that are structurally adapted to and have the same number as the rotating shaft holes 51, enabling the louver blades 5 to rotate flexibly around the blade mounting shaft (plug screw) of the vertical keel 1; the linkage holes 52 connect multiple louver blades 5 through the blade linkage rods 6 to ensure their synchronous rotation and make the shading effect more uniform; the force-bearing hole 53 of one of the louver blades 5 is hinged to the adjustable push rod 7. When the adjustable push rod 7 moves under the drive of the lever assembly 9, it can accurately transmit the power to the louver blade 5 to drive its rotation, realizing the synchronous angle adjustment of multiple louver blades 5, ensuring the normal and orderly operation of the shading device. Moreover, the force-bearing hole 53 is closer to the rotating shaft hole 51, enabling the louver blade 5 to rotate a larger angle with only a small push amplitude.

[0064] It should also be noted that the number and width of the louver blades 5 can be selected by the architect according to their aesthetics. Therefore, compared with traditional devices, it can make the building facade more beautiful and unified.

[0065] In this embodiment, as Figure 1 and Figure 4 shown, small-angle folds are provided on both long sides of the louver blade 5.

[0066] It should be noted that the small-angle folds on both sides of the louver blade 5 are not more than 30 degrees. At the mechanical level, the structural stiffness of the louver blade 5 is increased. That is, the small-angle folds change the cross-sectional shape of the louver blade 5, increasing its bending resistance, making the louver blade 5 less likely to deform when subjected to external forces such as wind force, effectively extending the service life of the louver blade 5. From the perspective of shading, the small-angle folds can change the reflection path of light, causing light to scatter multiple times during reflection, reducing the amount of sunlight directly passing through the louver blade 5, further enhancing the shading effect, creating a better shading environment indoors, and enhancing the shading performance of this device.

[0067] Principle of operation: When sunlight shines on the vertical keel 1, the surface of the vertical keel 1 quickly absorbs heat, and its temperature rise can reach 50°C. Since the upper end of the vertical keel 1 is fixed above the window opening through the upper connecting steel plate 2 and the rear steel plate 4, and the lower end is a free end, after being heated, the vertical keel 1 will linearly elongate along the length direction due to thermal expansion. Under the restraint of the limit slider 8, the lower end of the vertical keel 1 stably elongates downward to press the power arm of the lever 91. The downward displacement of the force application point of the power arm can magnify the displacement of the resistance point of its resistance arm by dozens of times. The displacement of the end part of the resistance arm of the lever 91 pushes the louver blade 5 upward through the adjustable push rod 7, making the louver blade 5 rotate into a closed state close to the vertical. The louver blades 5 are synchronously rotated through the blade linkage rod 6. Therefore, when one of the louver blades 5 rotates into the closed state, all the louver blades 5 are synchronously rotated and closed to achieve the sunshade function. When there is no sunlight, the vertical keel 1 cools and contracts, the pressure on the power arm of the lever 91 disappears, and the louver blade 5 rotates back to the horizontal open state under its own gravity. The entire adjustment process does not require manual intervention or external energy input, and completely relies on physical effects to achieve adaptive sunshading.

[0068] The above is only a preferred embodiment of the present application, and does not impose any form of limitation on the present application. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present application by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present application without departing from the content of the technical solution of the present application shall be covered by the protection scope of the present application.

Claims

1. An external sunshade device for automatically adjusting the louver angle, characterized in that, Comprising: At least two vertical keels (1), the vertical keels (1) being made of a metal material with a high coefficient of thermal expansion, and one end of the vertical keel (1) being a fixed end and the other end being a free end; A limit slider (8), fixedly arranged at the free end of the vertical keel (1), for restricting the horizontal displacement of the free end of the vertical keel (1) and allowing its vertical free expansion and contraction; A lever assembly (9), including a lever (91), a fulcrum seat (92) and a fulcrum shaft (93), the power arm of the lever (91) being in contact connection with the free end of the vertical keel (1), and the resistance arm of the lever (91) being connected to the louver blade (5) through an adjustable push rod (7); And A plurality of louver blades (5), the plurality of louver blades (5) being all connected to a blade linkage rod (6), one of the plurality of louver blades (5) being hinged to the adjustable push rod (7), being driven by the adjustable push rod (7) to adjust the tilt angle, and the remaining louver blades (5) being linked with the louver blade (5) driven by the adjustable push rod (7) through the blade linkage rod (6).

2. The external sunshade device for automatically adjusting the louver angle according to claim 1, characterized in that: The surface of the vertical keel (1) is coated with a heat-absorbing coating.

3. The external sunshade device for automatically adjusting the louver angle according to claim 1, wherein: The upper end of the vertical keel (1) is fixedly connected to an upper connecting steel plate (2), the limit slider (8) is fixedly connected to a lower connecting steel plate (3), and one end of the upper connecting steel plate (2) and the lower connecting steel plate (3) are respectively fixedly connected with a rear steel plate (4).

4. The external sunshade device for automatically adjusting the louver angle according to claim 3, wherein: The rear steel plate (4) is provided with mounting holes for being fixed to a building wall through expansion bolts, and an annular sealant groove and a sealant injection hole are provided around the mounting holes for injecting sealant to prevent rainwater from entering the expansion bolt holes on the wall.

5. The external sunshade device with automatically adjustable louver angles according to claim 1, characterized in that: The limit slider (8) is provided with a chute (82), and the lower end of the vertical keel (1) is inserted into the chute (82).

6. The external sunshade device with automatically adjustable louver angles according to claim 5, characterized in that: The chute (82) is L-shaped, and the structure of the lower end of the vertical keel (1) is adapted to the L-shaped structure.

7. An external sunshade device for automatically adjusting the louver angle according to claim 1, characterized in that: The fulcrum seat (92) is arranged at one end of the lever (91) close to the vertical keel (1); The fulcrum seat (92) is provided with an oblong hole (921), the limit slider (8) is provided with a screw hole (81), and the fulcrum seat (92) is connected to the screw hole (81) on the limit slider (8) through the oblong hole (921) for adjusting the position of the fulcrum seat (92) on the limit slider (8) to change the length of the power arm of the lever (91).

8. The external sunshade device for automatically adjusting the louver angle according to claim 1, wherein: The adjustable push rod (7) is a telescopic structure with a lockable length; The adjustable push rod (7) includes two support rods, one end of each of the two support rods being respectively provided with a screw hole and a long hole, the screw holes and long holes of the two support rods being connected by screws, and after the two support rods are connected into an adjustable push rod (7), its two ends are respectively hinged to the lever (91) and the louver blade (5).

9. The external sunshade device for automatically adjusting the louver angle according to claim 1, wherein: The short sides on both sides of the louver blade (5) are provided with right-angled flanges, and a rotating shaft hole (51), a linkage hole (52) and a stress hole (53) are arranged on the right-angled flanges. The linkage hole (52) and the stress hole (53) are respectively located on both sides of the rotating shaft hole (51), and the stress hole (53) is close to the rotating shaft hole (51). The louver blade (5) is hinged to the vertical keel (1) through the rotating shaft hole (51), the louver blade (5) is hinged to the blade linkage rod (6) through the linkage hole (52), and one of the plurality of louver blades (5) is hinged to the adjustable push rod (7) through the stress hole (53).

10. The external sunshade device for automatically adjusting the louver angle according to claim 1, characterized in that: The long sides on both sides of the louver blade (5) are provided with small-angle flanges.

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