Sunshade device and vehicle

Abstract

The utility model relates to a sun-shading device and a vehicle. The sun-shading device comprises a storage reel and curtain cloth. The curtain cloth is provided with a photoelectric conversion module and comprises a fixed end and a free end which are oppositely arranged in the first direction, the fixed end is connected with the storage reel, and the free end can move in the first direction. The photoelectric conversion module comprises a first end and a second end which are oppositely arranged in the first direction, the first end is far away from the free end compared with the second end, and the thickness of the first end is smaller than that of the second end. The thickness of the photoelectric conversion module at the joint of the curtain cloth and the storage reel is reduced, so that the bending deflection of the curtain cloth during rolling is effectively reduced. The attaching strength between the curtain cloth and the storage reel is enhanced, the risk that the curtain cloth is disengaged from the storage reel in the using process is remarkably reduced, and the stability and reliability of the sunshade device are improved.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and more particularly to a sunshade device and vehicle. Background Technology

[0002] Solar energy is one of the better clean energy sources. Combining flexible solar cells with car sunshades can combine the advantages of both, providing sun protection for vehicles while also generating electricity through photovoltaic conversion, thus achieving energy saving for vehicles.

[0003] Flexible solar cells, based on the need for cell isolation and protection, generally have an encapsulation layer added outside the cell's functional layer. However, the increased thickness of the encapsulated flexible cell leads to a decrease in its flexibility and a larger winding radius. This makes it difficult to bond and fix the starting section of the curtain to the roller after the flexible solar cell is attached and integrated with the existing sunshade curtain. Consequently, the curtain is prone to detaching from the roller and failing during the winding process. Summary of the Invention

[0004] To address the above problems, this application provides a sunshade device, comprising:

[0005] Storage scrolls;

[0006] A curtain fabric is provided with a photoelectric conversion module. The curtain fabric includes a fixed end and a free end arranged opposite to each other along a first direction. The fixed end is connected to the storage roller, and the free end is movable along the first direction.

[0007] The photoelectric conversion module includes a first end and a second end disposed opposite to each other along the first direction. The first end is farther away from the free end than the second end, and the thickness of the first end is less than the thickness of the second end.

[0008] In one embodiment, the thickness of the first end gradually decreases from the free end toward the fixed end.

[0009] In one embodiment, the photoelectric conversion module includes a bottom encapsulation film, a solar cell, and a top encapsulation film stacked sequentially.

[0010] The sunshade device includes an unfolded state;

[0011] When the sunshade device is in the unfolded state, the distance from the edge of the bottom encapsulation film near the fixed end to the free end is the first distance, the distance from the edge of the solar cell near the fixed end to the free end is the second distance, and the distance from the edge of the top encapsulation film near the fixed end to the free end is the third distance.

[0012] Wherein, the first distance is less than the second distance, and the second distance is less than the third distance; or, the first distance is greater than the second distance, and the second distance is greater than the third distance.

[0013] In one embodiment, the absolute value of the difference between the first distance and the second distance is greater than or equal to 5 mm and less than or equal to 30 mm; and / or,

[0014] The absolute value of the difference between the second distance and the third distance is greater than or equal to 5 mm and less than or equal to 30 mm.

[0015] In one embodiment, the difference between the first distance and the second distance is a first difference, the difference between the second distance and the third distance is a second difference, and the first difference is equal to the second difference.

[0016] In one embodiment, the fabric further includes a flexible substrate located on the side of the bottom encapsulation film away from the solar cell;

[0017] The dimensions of the flexible substrate in the first direction are the same as the dimensions of the bottom encapsulation film in the first direction; or

[0018] The size of the flexible substrate in the first direction is smaller than the size of the bottom encapsulation film in the first direction.

[0019] In one embodiment, the sunshade device further includes a storage housing, and the storage roller is rotatably disposed within the storage housing; the storage housing is provided with an opening, and the curtain is used to move away from the storage roller through the opening and along a first direction;

[0020] The storage housing includes a first end face and a second end face that are disposed opposite to each other along the axial direction of the storage roll, and the storage housing also includes a peripheral side face disposed around the axial direction of the storage roll.

[0021] The storage housing has one or more protrusions on its peripheral side, and the protrusions extend from the inner wall of the storage housing toward the storage roll.

[0022] In one embodiment, the number of protrusions is plurality, and the plurality of protrusions are arranged at radial intervals along the receiving roll; or

[0023] The protrusion is ring-shaped and fits around the outer periphery of the storage roll.

[0024] In one embodiment, when the protrusions are spaced apart along the radial direction of the storage roll, the minimum distance between two adjacent protrusions is greater than or equal to 10 mm and less than or equal to 50 mm; and / or

[0025] The height of the protrusion is greater than or equal to 1 mm and less than or equal to 10 mm; and / or

[0026] The cross-sectional shape of the protrusion is at least one of rectangular, trapezoidal, arc-shaped, or polygonal; and / or

[0027] In the direction extending along the axis of the storage roll, the minimum value of the interval between adjacent protrusions is greater than or equal to 5 mm and less than or equal to 50 mm.

[0028] In one embodiment, the peripheral side surface includes a first side surface and a second side surface disposed opposite to each other along the first direction, and a third side surface and a fourth side surface disposed opposite to each other along the second direction, wherein the second direction is perpendicular to the first direction;

[0029] The opening is located in the region of the first side near the fourth side, or at the junction of the first side and the fourth side; the protrusion is provided on the fourth side.

[0030] This application also provides a vehicle including a sunshade as mentioned in any of the above embodiments.

[0031] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0032] As can be seen from the above embodiments, the sunshade device of this application includes a storage roller and a curtain. The curtain is provided with a photoelectric conversion module and includes a fixed end and a free end arranged opposite to each other along a first direction. The fixed end is connected to the storage roller, and the free end is movable along the first direction. The photoelectric conversion module includes a first end and a second end arranged opposite to each other along the first direction. The first end is farther away from the free end than the second end, and the thickness of the first end is less than the thickness of the second end. By reducing the thickness of the photoelectric conversion module at the connection between the curtain and the storage roller, this application effectively reduces the bending deflection of the curtain during winding. This not only enhances the bonding strength between the curtain and the storage roller but also significantly reduces the risk of the curtain detaching from the storage roller during use, thereby improving the stability and reliability of the sunshade device.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the description are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a sunshade device provided in one embodiment of this application from a certain perspective.

[0036] Figure 2 This is a schematic diagram of the structure of a sunshade device provided in one embodiment of this application from another perspective.

[0037] Figure 3 This is a schematic diagram of the photoelectric conversion module provided in one embodiment of this application from a certain perspective.

[0038] Figure 4 This is another structural schematic diagram of the photoelectric conversion module provided in one embodiment of this application from a certain perspective.

[0039] Figure 5 This is a schematic diagram of the photoelectric conversion module provided in one embodiment of this application from a certain perspective.

[0040] Figure 6 This is a schematic diagram of the photoelectric conversion module provided in one embodiment of this application from a certain perspective.

[0041] Figure 7 This is a cross-sectional view of the storage housing provided in one embodiment of this application from a certain perspective.

[0042] Figure 8 This is another cross-sectional view of the storage housing provided in one embodiment of this application from one perspective.

[0043] Figure 9 This is a side view of the storage housing provided in one embodiment of this application.

[0044] Figure 10 This is another side view of the storage housing provided in one embodiment of this application.

[0045] Figure label:

[0046] 1. Storage roll; 10. Fixed end; 11. Free end; 2. Curtain; 20. Bottom encapsulation film; 21. Solar cell; 22. Top encapsulation film; 23. Flexible substrate; d1. First distance; d2. Second distance; d3. Third distance; c1. First difference; c2. Second difference; 3. Storage housing; 31. First side; 32. Second side; 33. Third side; 34. Fourth side; 330. Protrusion; E1. First spacing; E2. Second spacing; H1. First height; a. First end; b. Second end. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The manner described in the following exemplary embodiments does not represent all manner consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0048] With the increasing popularity of automobiles, the demand for car sunshades has also risen. The value that car sunshades bring to vehicle users mainly lies in their sun protection and heat insulation effects, improved driving comfort, and potential energy-saving and environmental benefits. Solar energy is one of the better clean energy sources. Combining flexible solar cells with car sunshades can combine the advantages of both, providing sun protection for vehicles while also providing photovoltaic power, thus achieving energy conservation. For space-saving or automated operation, retractable roll-up sunshades are a common type. The fabric is generally made of nylon, silk, mesh, or pure cotton, etc., which are soft and correspond to a small roller radius (10-20mm). During the rolling process, the sunshade fabric can maintain a good fit with the roller, achieving normal unfolding and retraction.

[0049] Flexible solar cells (including cadmium telluride, copper indium gallium selenide, gallium arsenide, and perovskite cells) typically incorporate an encapsulation layer (including PI, PEN, and PET) outside the functional cell layer to meet the need for cell insulation and protection. The encapsulation layer thickness is generally 10–200 μm, varying depending on the level of water and oxygen insulation. Encapsulation reduces the flexibility of the flexible cell and increases its roll-up radius. The situation worsens when flexible solar cells are integrated with existing shading curtains. Problems arise such as difficulty in bonding and securing the initial section of the curtain to the roll, leading to detachment during initial roll-up. Furthermore, the integrated shading curtain cannot maintain a good fit with the existing roll-up, exhibiting significant bending deflection. During roll-up, it comes into contact with the inner wall of the housing containing the roll-up, greatly increasing contact friction and requiring a larger torque for both roll-up and unroll-up, thus hindering normal operation.

[0050] Based on this, this application provides a sunshade device, including a storage roller 1 and a curtain 2. (See reference...) Figures 1-4 The curtain 2 is equipped with a photoelectric conversion module. The curtain 2 includes a fixed end 10 and a free end 11 arranged opposite each other along a first direction X. The fixed end 10 is fixedly connected to the storage roller 1, and the free end 11 can move along the first direction. The photoelectric conversion module includes a first end a and a second end b arranged opposite each other along the first direction X. The first end a is farther away from the free end 11 than the second end b, and the thickness of the first end a is less than the thickness of the second end b.

[0051] Specifically, the curtain 2 is equipped with a photoelectric conversion module made of high-efficiency solar cells covered with a transparent protective film to ensure photoelectric conversion efficiency while providing good weather resistance and UV resistance. The fixed end 10 of the curtain 2 is fixedly connected to the storage roller 1 using high-strength adhesive or sewing technology to ensure a firm connection. The free end 11 is designed with a weight block or magnetic component for fixing to maintain the flatness and stability of the curtain 2 when unfolded.

[0052] The photoelectric conversion module has a first end a and a second end b at its two ends along the first direction X. The first end a is farther away from the free end 11 than the second end b, and its thickness is set to be thinner, while the second end b is closer to the free end 11 than the first end a, and its thickness is set to be relatively thicker. This gradual thickness design not only ensures the uniform distribution of the photoelectric conversion module, but also effectively reduces the bending stress of the curtain 2 during winding.

[0053] In practical applications, when sun shading is needed, the curtain 2 is unrolled from the storage roller 1 using a drive device (such as a motor or manual crank), so that the sun shading device is in the unfolded state. The photoelectric conversion module then receives sunlight and converts it into electrical energy. When sun shading is not needed, the drive device reverses its direction, evenly rolling the curtain 2 back onto the storage roller 1, so that the sun shading device is in the rolled-up state. Because the photoelectric conversion module is thinner at the end near the storage roller 1, the curtain 2 can fit tightly against the surface of the storage roller 1 during the rolling process, avoiding the curtain 2 from lifting or detaching due to uneven thickness.

[0054] The sunshade device of this application improves the fit between the curtain 2 and the storage roller 1 by optimizing the thickness design of the photoelectric conversion module, reducing the risk of the curtain 2 detaching and improving the stability and reliability of the sunshade device. At the same time, without compromising the overall performance of the photoelectric conversion module, the sunshade device of this application cleverly optimizes its thickness distribution, ensuring smooth unfolding and rewinding of the curtain 2 while fully utilizing the surface space of the curtain 2, thus enhancing the practicality and functionality of the sunshade device and providing users with a more convenient and efficient user experience.

[0055] Furthermore, the thickness of the first end a gradually decreases from the free end 11 towards the fixed end 10. This gradual thickness design not only helps the curtain 2 to fit more tightly against the storage roller 1 during winding, but also ensures a uniform distribution of force on the curtain 2 during unfolding, avoiding deformation or damage to the curtain 2 due to localized stress concentration. In addition, by precisely controlling the thickness variation of the photoelectric conversion module, the bending deflection of the curtain 2 can be minimized while ensuring its photoelectric conversion efficiency, thereby further enhancing the bonding strength between the curtain 2 and the storage roller 1 and reducing the risk of accidental detachment of the curtain 2 during use.

[0056] In some implementations, refer to Figures 3-5 The photoelectric conversion module includes a bottom encapsulation film 20, a solar cell 21, and a top encapsulation film 22 stacked sequentially. This arrangement effectively protects the solar cell 21 and also improves photoelectric conversion efficiency and stability.

[0057] Specifically, the solar cell 21, as the core component, is responsible for converting light energy into electrical energy, and its material can be configured as a thin-film solar material. The top encapsulation film 22 has a light-transmitting surface on the side away from the solar cell 21, ensuring that light can pass through smoothly and illuminate the solar cell 21, thus providing a certain degree of light transmission. It also prevents damage to the solar cell 21 from the external environment, providing a certain degree of protection. Preferably, the transparent material forming the light-transmitting surface is any one of polyester (PET), polyimide (PI), or polyethylene naphthalate (PEN).

[0058] Reference Figures 2 to 5 When the sunshade device is in the unfolded state, the distance from the edge of the bottom encapsulation film 20 near the fixed end 10 to the free end 11 is the first distance d1, the distance from the edge of the solar cell 21 near the fixed end 10 to the free end 11 is the second distance d2, and the distance from the edge of the top encapsulation film 22 near the fixed end 10 to the free end 11 is the third distance d3.

[0059] It should be noted that, in this embodiment, the sunshade device being in the unfolded state means that its free end 11 is far away from the storage roller 1 and is in its extreme position. In other words, the curtain 2 has been fully unfolded, that is, the free end 11 of the curtain 2 is at the farthest point from the storage roller 1, and at this time the curtain 2 is in a state of maximum extension, reaching its maximum unfolded area.

[0060] In one embodiment, refer to Figure 4 and Figure 5When the first distance d1 is less than the second distance d2, and the second distance d2 is less than the third distance d3, it means that the edge of the bottom encapsulation film 20 is closer to the free end 11, while the edge of the top encapsulation film 22 is relatively farther away from the free end 11. This arrangement helps the bottom encapsulation film 20 to contact the winding roll 1 first when the curtain 2 is rolled up, thereby playing a guiding and buffering role, reducing the squeezing and friction on the solar cell 21 during the winding process, and protecting the integrity of the solar cell 21. At the same time, the edge of the top encapsulation film 22 is farther away, which can provide better support and protection when the curtain 2 is unfolded, preventing the top encapsulation film 22 from being damaged due to premature contact with external objects during the unfolding process.

[0061] Conversely, refer to Figure 3 and Figure 6 When the first distance d1 is greater than the second distance d2, and the second distance d2 is greater than the third distance d3, the edge of the bottom encapsulation film 20 is further away from the free end 11, while the edge of the top encapsulation film 22 is closer to the free end 11. This design is advantageous because when the curtain 2 is wound up, the top encapsulation film 22 contacts the winding roll 1 first, utilizing its high mechanical strength and wear resistance to withstand the friction and pressure during the winding process, thus protecting the internal solar cells 21 and the bottom encapsulation film 20.

[0062] The settings for the distance and thickness between the layers of the curtain fabric 2 in this application not only improve the stability and reliability of the curtain fabric 2 during the winding and unfolding process, but also effectively protect the various components of the photoelectric conversion module and extend the service life of the sunshade device. At the same time, by reasonably adjusting the relative position and thickness of each layer, a good performance balance can be achieved in different application scenarios, meeting the diverse needs of users for sunshade and power generation functions.

[0063] In some implementations, refer to Figure 5 and Figure 6 The difference between the first distance d1 and the second distance d2 is called the first difference c1, and the difference between the second distance d2 and the third distance d3 is called the second difference c2. The absolute value of the first difference c1 is greater than or equal to 5 mm and less than or equal to 30 mm. The absolute value of the second difference c2 is greater than or equal to 5 mm and less than or equal to 30 mm.

[0064] In one embodiment, the absolute value of the first difference c1 and the absolute value of the second difference c2 are not equal, and the absolute values ​​of the first difference c1 and the second difference c2 are both selected from any one of 5mm, 10mm, 15mm, 20mm, 25mm and 30mm.

[0065] In one embodiment, the absolute values ​​of the first difference c1 and the second difference c2 are equal. The absolute values ​​of both the first difference c1 and the second difference c2 are chosen from any one of 5mm, 10mm, 15mm, 20mm, 25mm, and 30mm. Preferably, both the first difference c1 and the second difference c2 are 10mm. This equal difference setting results in a stepped arrangement between the layers of the bottom encapsulation film 20, the solar cell 21, and the top encapsulation film 22, with each step having an equal difference. This uniform decreasing structure not only presents a simple and orderly arrangement visually but also improves the service life and reliability of the curtain fabric 2, significantly enhancing the power generation efficiency of the photoelectric conversion module.

[0066] In some implementations, refer to Figure 3 and Figure 4 The fabric 2 also includes a flexible substrate 23. The flexible substrate 23 is located on the side of the bottom encapsulation film 20 away from the solar cell 21. The main function of the flexible substrate 23 is to provide additional mechanical support and protection for the bottom encapsulation film 20, the solar cell 21 and the top encapsulation film 22, while enhancing the overall flexibility, durability and waterproof performance of the fabric 2, and enabling it to adapt to frequent unfolding and rewinding operations.

[0067] The material of the curtain fabric 2 can be polyester fiber, polyvinylidene fluoride (PVDF) or polyimide (PI) and other materials with excellent mechanical properties and weather resistance.

[0068] In one embodiment, refer to Figure 3 and Figure 4 The flexible substrate 23 has the same dimensions as the bottom encapsulation film 20 in the first direction X. This arrangement allows the flexible substrate 23 to fully support the bottom encapsulation film 20 and its solar cells 21 and top encapsulation film 22, ensuring the stability and uniform stress distribution of the entire photoelectric conversion module on the curtain 2. When the curtain 2 is rolled up or unrolled, the flexible substrate 23 moves synchronously with the bottom encapsulation film 20, avoiding wrinkles or stretching deformation caused by size mismatch, thereby improving the service life and reliability of the curtain 2. In addition, the identical dimensions of the flexible substrate 23 and the bottom encapsulation film 20 facilitate precise alignment and bonding during production and processing, improving production efficiency and product quality.

[0069] In one embodiment, the flexible substrate 23 is smaller in size in the first direction than the bottom encapsulation film 20 in the first direction. This configuration reduces the amount of flexible substrate 23 used while ensuring necessary mechanical support, thereby reducing production costs and overall weight. When the curtain 2 is rolled up, the smaller flexible substrate 23 avoids stress concentration due to excessive stretching, helping to maintain the flatness and fit of the curtain 2. Simultaneously, this configuration provides a certain degree of flexibility when the curtain 2 is unrolled, allowing it to better adapt to different usage environments and installation conditions.

[0070] In some implementations, refer to Figure 1 The sunshade device also includes a housing 3, within which a rotating housing spool 1 is housed. This application does not strictly limit the specific shape of the housing 3. In practical applications, the selection of the shape of the housing 3 should comprehensively consider factors such as installation location, function, space constraints, and aesthetic requirements to ensure that the sunshade device meets usage needs while also harmonizing with the overall design of the vehicle.

[0071] Specifically, the shape of the storage housing 3 is influenced by the vehicle's structure and spatial layout at the installation location. For example, under a rectangular roof rack, a cuboid storage housing 3 may be easier to install and integrate; while a round roof structure may be more suitable for a cylindrical storage housing 3. In terms of functionality, different shapes of the storage housing 3 affect the roll-up and unfolding mechanism of the curtain 2. For instance, a trapezoidal cylindrical shape can create a visually gradient effect and accommodate specific installation angles. Space constraints require the storage housing 3 to utilize available space efficiently without wasting space; for example, a cuboid shape may save more space in a narrow doorway. Aesthetic requirements necessitate consideration of the overall vehicle style and user preferences. For instance, modern cars often use streamlined or geometrically shaped storage housings 3 to enhance visual appeal.

[0072] In a preferred embodiment, the storage housing 3 can be in the shape of a cuboid, cylinder, trapezoidal prism, or semicircle. The following embodiments in this application will use a cuboid as an example. The cuboid-shaped storage housing 3 has a regular structure, making it easy to match with the rectangular roof rack or interior structure of a car door. It has a high space utilization rate, effectively utilizing the limited space of the car. At the same time, its regular shape coordinates with the overall design of the car, meeting aesthetic requirements. This shape of storage housing 3 has wide adaptability in practical applications, blending well with common sedans and SUVs, ensuring that the sunshade device not only meets usage needs but also complements the overall style of the car. The following embodiments in this application will use a rectangular shape as an example.

[0073] Specifically, the storage housing 3 is provided with an opening, through which the curtain 2 is used to move away from the storage roller 1 and along the first direction X. The storage housing 3 includes a first end face (not shown in the figure) and a second end face (not shown in the figure) arranged opposite to each other along the axial direction of the storage roller 1. The storage housing 3 also includes a peripheral side face arranged around the axial direction of the storage roller 1.

[0074] Furthermore, referring to Figures 7 to 10The peripheral side surface includes a first side surface 31 and a second side surface 32 arranged opposite each other along a first direction X, and a third side surface 33 and a fourth side surface 34 arranged opposite each other along a second direction Y, wherein the second direction Y is perpendicular to the first direction X. One or more protrusions 30 are provided on the peripheral side surface of the storage housing 3, and the protrusions 30 extend from the inner wall toward the storage roll 1.

[0075] The protrusion 30 in this application can effectively reduce the contact area between the curtain 2 and the inner wall of the storage housing 3, thereby reducing the friction during the winding process, making the unfolding and winding of the curtain 2 smoother, reducing wear, and extending the service life of the curtain 2.

[0076] In some embodiments, the protrusion 30 is provided on only one of the first side 31, the second side 32, the third side 33, and the fourth side 34.

[0077] Preferably, the protrusion 30 is positioned on the side near the opening. This arrangement not only reduces friction between the curtain 2 and the inner wall of the housing 3 during unfolding and rewinding, making the curtain 2 move more smoothly, reducing wear, and extending its service life, but also helps to reduce production costs.

[0078] In one embodiment, when the opening is located in the region of the first side 31 near the fourth side 34, the protrusion 30 is provided on the fourth side 34.

[0079] In one embodiment, when the opening is located at the junction of the first side 31 and the fourth side 34, the protrusion 30 is provided on the fourth side 34.

[0080] In some embodiments, the protrusion 30 is disposed on any two of the first side 31, the second side 32, the third side 33, and the fourth side 34, and the two sides are not adjacent. This arrangement can form a stable support structure in the corner area of ​​the curtain 2, enhance the structural strength of the curtain 2 when subjected to greater wind force or weight, and prevent local deformation or damage.

[0081] In some embodiments, the protrusion 30 can be provided on any two of the first side 31, the second side 32, the third side 33, and the fourth side 34, and the two sides are adjacent to each other. For example, the protrusion 30 can be provided on both the first side 31 and the third side 33. This design can form a stable support frame in the corner area of ​​the curtain 2, enhancing the structural strength of the curtain 2 in that area. It is especially suitable for situations where the curtain 2 needs to withstand greater wind force or weight when unfolded, effectively preventing local deformation or damage to the curtain 2.

[0082] In some embodiments, the protrusion 30 is disposed on any three or four of the first side 31, the second side 32, the third side 33, and the fourth side 34. When the protrusion 30 is disposed on three or four sides, the contact area between the curtain 2 and the inner wall can be further reduced, providing all-round support and protection for the curtain 2, ensuring that it maintains good condition in various complex environments, and improving the reliability and durability of the sunshade device.

[0083] In one embodiment, when protrusions 30 are provided on the first side 31, the second side 32, the third side 33 and the fourth side 34, the protrusions 30 are arranged at radial intervals along the receiving scroll 1.

[0084] This design effectively reduces the contact area between the curtain 2 and the inner wall of the housing 3, thereby reducing friction and making the unfolding and rewinding of the curtain 2 smoother. By evenly distributing radially spaced protrusions 30 on the four sides, it can be ensured that the curtain 2 is uniformly supported and guided in all directions, preventing deviation or twisting during unfolding or rewinding, and improving the stability and reliability of the sunshade device.

[0085] Furthermore, referring to Figure 9 When the protrusions 30 are arranged at intervals along the radial direction of the receiving scroll 1, the interval between two adjacent protrusions 30 is a first spacing E1, the minimum value of the first spacing E1 is greater than or equal to 10 mm and less than or equal to 50 mm. Specifically, the distance between two adjacent protrusions 30 is any one of 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm.

[0086] In one embodiment, when protrusions 30 are provided on the first side 31, the second side 32, the third side 33 and the fourth side 34, the protrusions 30 are annular and sleeved on the outer periphery of the receiving scroll 1.

[0087] It should be noted that in this embodiment, the annular shape refers to the protrusion 30 forming a closed structure with its ends connected. This closed structure is not limited to the traditional circular ring form. Its annular structure can be adapted to the shape of the storage housing 3. For example, when the storage housing 3 is a cuboid shape, the annular shape of the protrusion 30 can be a square ring with a rectangular cross-section. Furthermore, it should be understood that in this embodiment, the sleeve arrangement can be understood as the annular protrusion 30 surrounding the storage scroll 1 like the peripheral surface of the storage housing 3, but the two are not in direct contact. This design allows the protrusion 30 to provide additional support and positioning functions without interfering with the normal rotation of the storage scroll 1, while also helping to reduce friction and wear between components.

[0088] The protrusion 30 in this application can effectively reduce the contact area between the curtain 2 and the inner wall of the storage housing 3, thereby reducing friction and making the unfolding and rolling of the curtain 2 smoother.

[0089] In some implementations, refer to Figure 7 In the direction extending along the axis of the storage scroll 1, the interval between adjacent protrusions 30 is a second spacing E2, and the minimum value of the range of the second spacing E2 is greater than or equal to 5 mm and less than or equal to 50 mm.

[0090] Furthermore, the protrusions 30 are spaced apart along the radial direction of the receiving roll 1 to form a non-closed protruding ring. Adjacent non-closed protruding rings are spaced apart by a second spacing E2 in the direction extending along the axial direction of the receiving roll 1, and the second spacing E2 is any one of 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, and 50mm.

[0091] Specifically, the protrusions 30 are continuously arranged along the radial direction of the receiving roll 1 to form a closed protrusion ring. Adjacent closed protrusion rings are arranged at a second spacing E2 in the direction extending along the axial direction of the receiving roll 1, and the second spacing E2 is any one of 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, and 50mm.

[0092] In some embodiments, the height and shape of the protrusion 30 are not limited. This design can optimize the rolling effect of the curtain 2, making it tighter and neater, reducing the volume after rolling, and improving space utilization. The arrangement of the protrusion 30 can be flexibly adjusted according to different usage environments and needs to adapt to different sunshade device performance requirements.

[0093] Specifically, refer to Figure 7 The height of the protrusion 30 is a first height H1. The first height H1 is greater than or equal to 1 mm and less than or equal to 10 mm. It can be understood as the distance that the protrusion 30 extends from the inner wall of the housing 3 towards the housing scroll 1. Preferably, the height of the protrusion 30 is set to any one of 2 mm, 4 mm, 6 mm, and 8 mm.

[0094] Furthermore, the cross-sectional shape of the protrusion 30 can be at least one of a rectangle, trapezoid, arc, or polygon. (See reference...) Figure 7 The protrusion 30 has a rectangular cross-section, which provides stable support and positioning, ensuring that the curtain 2 remains neat during winding. (Refer to...) Figure 8The protrusion 30 has an arc-shaped cross-section, which allows for a smooth transition and reduces friction on the curtain 2 during movement. A trapezoidal cross-section helps disperse stress when the curtain 2 unfolds, reducing the risk of deformation. A polygonal cross-section can be customized to fit the specific shape of the housing 3 to meet different design requirements. This diverse cross-sectional design allows the protrusion 30 to optimize the curtain 2's retraction effect while also improving the stability and durability of the entire sunshade device.

[0095] It should be noted that this application does not limit the connection method between the storage scroll 1 and the storage housing 3.

[0096] In one embodiment, the storage roller 1 is connected to the first and second end faces of the storage housing 3 via bearing seats at both ends. The bearing seats and the storage housing 3 are fixed together with bolts, ensuring a strong and stable connection. This connection method facilitates disassembly and maintenance of the storage roller 1 when needed, improving the maintainability of the sunshade device.

[0097] In one embodiment, both ends of the storage roller 1 are directly connected to the inner wall of the storage housing 3 via sliding bearings. The sliding bearings reduce frictional resistance during rotation of the storage roller 1, improving the smoothness of winding and unwinding the curtain 2. Simultaneously, the interference fit between the sliding bearings and the storage housing 3 ensures a tight and stable connection, eliminating the need for additional bolts and simplifying the structural design.

[0098] In one embodiment, the storage roll 1 and the storage housing 3 are connected by an elastic snap-fit. One end of the elastic snap-fit ​​is fixed to the inner wall of the storage housing 3, and the other end is engaged in the slots at both ends of the storage roll 1. This connection method has the advantages of convenient installation and disassembly, allowing for quick installation and replacement of the storage roll 1 without the use of tools. Simultaneously, the elastic design of the snap-fit ​​can compensate for certain manufacturing and installation errors, ensuring the coaxiality and rotational flexibility between the storage roll 1 and the storage housing 3.

[0099] In some embodiments, the sunshade device further includes a drive mechanism. The drive mechanism is used to drive the retractable roller 1 to roll up and unfold the curtain 2.

[0100] In one embodiment, the drive unit is configured as a small DC motor, mounted on the outer side of the storage housing 3, and connected to one end of the storage reel 1 via a coupling. Torque is transmitted between the motor's output shaft and the storage reel 1 via the coupling, thereby driving the rotation of the storage reel 1. The motor's mounting position facilitates connection to an external power supply and control system, enabling automated winding and unwinding operations. Furthermore, to improve the reliability and service life of the drive unit, a waterproof seal is provided between the motor and the storage housing 3 to prevent rainwater and other liquids from entering the motor.

[0101] In one embodiment, the drive unit is a manual crank mounted on top of the storage housing 3. By turning the crank, the manually applied torque is transmitted to the storage roller 1, enabling the manual winding and unwinding of the curtain 2. This manual drive method is suitable for applications with low automation requirements, or as a backup solution for automatic drive units. The crank is ergonomically designed for easy and effortless operation, and a protective cover is provided on the top of the storage housing 3 to prevent rainwater and other debris from entering the drive unit.

[0102] In one embodiment, the drive unit is configured as a stepper motor, mounted on the side of the storage housing 3, and connected to the storage roller 1 via gear transmission. The stepper motor enables precise angle control, thereby achieving accurate positioning and segmented unfolding or rewinding of the curtain 2. The gear transmission design improves the efficiency and stability of torque transmission, making the curtain 2 more stable and uniform during unfolding and rewinding. Furthermore, to enhance the intelligence of the drive unit, a photosensitive sensor and controller are also provided, which can automatically adjust the unfolding degree of the curtain 2 according to changes in external light intensity, achieving intelligent sunshade control.

[0103] This application also provides a vehicle including a sunshade device as mentioned in any of the above embodiments. It should be noted that the above sunshade device can be applied to automobiles and used as a sunroof sunshade, front and rear windshield sunshade, and four-door window sunshade, etc., achieving sunshade and power conversion through rolling and stretching.

[0104] The sunshade device of this application is applicable not only to automobiles but also to various architectural settings, such as residential, office, and commercial buildings. In residential buildings, it can be installed on balconies, windows, and other locations to provide shading and power generation for the interior. In office and commercial buildings, large-area sunshade devices can not only effectively reduce indoor temperatures but also provide partial power support for the building's lighting and air conditioning systems, achieving the goal of energy conservation and emission reduction.

[0105] The terms "first," "second," and similar terms used in this application and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, unless otherwise specified. "A plurality" or "several" indicates two or more. The term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A sunshade device, characterized in that, include: Storage scrolls; A curtain fabric is provided with a photoelectric conversion module. The curtain fabric includes a fixed end and a free end arranged opposite to each other along a first direction. The fixed end is connected to the storage roller, and the free end is movable along the first direction. The photoelectric conversion module includes a first end and a second end disposed opposite to each other along the first direction. The first end is farther away from the free end than the second end, and the thickness of the first end is less than the thickness of the second end.

2. The sunshade device according to claim 1, characterized in that, The thickness of the first end gradually decreases from the direction from the free end to the fixed end.

3. The sunshade device according to claim 2, characterized in that, The photoelectric conversion module includes a bottom encapsulation film, a solar cell, and a top encapsulation film stacked sequentially. The sunshade device includes an unfolded state; When the sunshade device is in the unfolded state, the distance from the edge of the bottom encapsulation film near the fixed end to the free end is the first distance, the distance from the edge of the solar cell near the fixed end to the free end is the second distance, and the distance from the edge of the top encapsulation film near the fixed end to the free end is the third distance. Wherein, the first distance is less than the second distance, and the second distance is less than the third distance; or, the first distance is greater than the second distance, and the second distance is greater than the third distance.

4. The sunshade device according to claim 3, characterized in that, The absolute value of the difference between the first distance and the second distance is greater than or equal to 5 mm and less than or equal to 30 mm; and / or, The absolute value of the difference between the second distance and the third distance is greater than or equal to 5 mm and less than or equal to 30 mm.

5. The sunshade device according to claim 3, characterized in that, The difference between the first distance and the second distance is the first difference, the difference between the second distance and the third distance is the second difference, and the first difference is equal to the second difference.

6. The sunshade device according to any one of claims 3-5, characterized in that, The fabric also includes a flexible substrate, which is located on the side of the bottom encapsulation film away from the solar cell; The dimensions of the flexible substrate in the first direction are the same as the dimensions of the bottom encapsulation film in the first direction; or The size of the flexible substrate in the first direction is smaller than the size of the bottom encapsulation film in the first direction.

7. The sunshade device according to claim 1, characterized in that, The sunshade device also includes a storage housing, and the storage roller is rotatably disposed inside the storage housing; the storage housing is provided with an opening, and the curtain is used to move away from the storage roller through the opening and along a first direction; The storage housing includes a first end face and a second end face that are disposed opposite to each other along the axial direction of the storage roll, and the storage housing also includes a peripheral side face disposed around the axial direction of the storage roll. The storage housing has one or more protrusions on its peripheral side, and the protrusions extend from the inner wall of the storage housing toward the storage roll.

8. The sunshade device according to claim 7, characterized in that, The number of protrusions is multiple, and the multiple protrusions are arranged at radial intervals along the storage roll; or The protrusion is ring-shaped and fits around the outer periphery of the storage roll.

9. The sunshade device according to claim 8, characterized in that, When the protrusions are spaced apart along the radial direction of the storage roll, the minimum distance between two adjacent protrusions is greater than or equal to 10 mm and less than or equal to 50 mm; and / or The height of the protrusion is greater than or equal to 1 mm and less than or equal to 10 mm; and / or The cross-sectional shape of the protrusion is at least one of rectangular, trapezoidal, arc-shaped, or polygonal; and / or In the direction extending along the axis of the storage roll, the minimum value of the interval between adjacent protrusions is greater than or equal to 5 mm and less than or equal to 50 mm.

10. The sunshade device according to claim 7, characterized in that, The peripheral side includes a first side and a second side disposed opposite to each other along the first direction, and a third side and a fourth side disposed opposite to each other along the second direction, wherein the second direction is perpendicular to the first direction; The opening is located in the region of the first side near the fourth side, or at the junction of the first side and the fourth side; the protrusion is provided on the fourth side.

11. A vehicle, characterized in that, Includes the sunshade device as described in any one of claims 1 to 10.

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