A starry sky roller blind mechanism for a vehicle

Abstract

The utility model discloses a kind of starry sky roller blind mechanism for car, comprising: main frame, fixed in sunroof roof interior, the main frame includes shell, slide rail and limit board;Roller blind cloth, roller blind cloth adopts three-layer composite structure, from inside to outside in turn is light-blocking base layer, buffer middle layer and light-transmitting surface layer;Optical fiber bundle, optical fiber bundle is in buffer middle layer in "S" shape path extension to avoid excessive stretch when winding up.Optical fiber bundle penetrates the three-layer structure of roller blind cloth, output end is flush with light-transmitting surface layer and is not outstanding, and the friction scratch when winding up is completely eliminated;Buffer middle layer in "S" shape path design, so that optical fiber can be along path slightly deformed when winding up stretch, avoid direct stress fracture, ensure that there is no extrusion when optical fiber winding, and optical fiber fracture rate is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive sunshade equipment, specifically a starry sky roller blind mechanism for automobiles. Background Technology

[0002] A car sunroof is an openable or fixed window installed on the roof of a vehicle. Its main functions include ventilation, improved lighting, auxiliary cooling and defogging, reduced wind noise, and providing a unique view and escape route. There are various types of sunroofs, and care should be taken to maintain them during use.

[0003] With the upgrading of automobile consumption, sunroof roller blinds with starry sky decoration effects have become an important feature of high-end models. They create a simulated starry sky atmosphere in the car by integrating optical fibers or LED light groups into the roller blind fabric. However, the existing starry sky roller blind mechanism has the following technical defects: the optical fibers or light groups are directly attached to the surface of the roller blind fabric. When rolling up, they are easily affected by compression and friction, which can easily cause the optical fibers to break or the solder joints of the light groups to fall off, resulting in an incomplete starry sky effect.

[0004] Therefore, we need to propose a starry sky roller blind mechanism for automobiles. Utility Model Content

[0005] The purpose of this invention is to provide a starry sky roller blind mechanism for automobiles, in which an optical fiber bundle runs through the three-layer structure of the roller blind fabric (light-shielding base layer - buffer middle layer - light-transmitting surface layer), and the output end is flush with the light-transmitting surface layer without protrusion, thus eliminating friction and scratching during winding; the "S"-shaped path design in the buffer middle layer allows the optical fiber to deform slightly along the path when it is wound and stretched, avoiding direct force breakage, ensuring no compression when the optical fiber is wound, and greatly reducing the optical fiber breakage rate, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A car-mounted starry sky roller blind mechanism, comprising: The main frame is fixed inside the sunroof roof interior. The main frame includes a shell, slide rails and limiting plates. Slide rails are provided between the two ends of the shell and the two ends of the limiting plates. The shell is long and narrow and forms an internal cavity. The roller blind is installed in the storage cavity of the outer shell. The roller blind is wound on a winding shaft, which is installed in the storage cavity of the outer shell. A steel strip torsion spring is provided on the winding shaft to provide winding force. The roller blind adopts a three-layer composite structure, consisting of a light-blocking base layer, a buffer middle layer, and a light-transmitting surface layer from the inside to the outside. The fiber bundle has its input end integrated at the rear end of the housing, and its output end is evenly distributed and runs through the three-layer structure of the roller blind. The output end of the fiber bundle is flush with the light-transmitting surface layer. The fiber bundle extends in an "S" shaped path within the buffer middle layer to avoid excessive stretching during winding.

[0007] Preferably, the light-shielding base layer is made of PVC material and the thickness of the light-shielding base layer is 0.3-0.5mm.

[0008] Preferably, the buffer middle layer is made of polyester fiber foam material, and the thickness of the buffer middle layer is 0.5-0.8mm.

[0009] Preferably, the light-transmitting surface layer is a TPU film with a light transmittance of ≥90%.

[0010] Preferably, the slide rail extends along the length of the skylight, and a guide groove with a "U" shaped cross-section is provided on the inner side of the slide rail, with a wear-resistant nylon slider embedded in the guide groove.

[0011] Preferably, the roller blind is fixedly connected to the front edge with a crossbar, and the two ends of the crossbar are hinged to the slider of the guide rail to ensure that the roller blind moves smoothly along the rail.

[0012] Preferably, the buffer middle layer is embedded with supporting keels at intervals, with a spacing of 10-15cm between adjacent supporting keels. The supporting keels are made of glass fiber material with a diameter of 2-3mm and extend along the width direction of the roller blind to enhance the anti-wrinkle ability.

[0013] Preferably, a lamp holder is provided at the rear end of the housing, and an LED lamp group is provided inside the lamp holder, including red, green and blue LED chips. The LED group is coupled to the input end of the optical fiber bundle through a focusing lens. The optical fiber bundle is a PMMA optical fiber with a diameter of 0.1-0.3mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The fiber bundle runs through the three-layer structure of the roller blind (light-shielding base layer - buffer middle layer - light-transmitting surface layer), and the output end is flush with the light-transmitting surface layer without protrusion, eliminating friction and scratching during winding; the "S"-shaped path design in the buffer middle layer allows the fiber to deform slightly along the path when it is wound and stretched, avoiding direct force breakage, ensuring no compression when the fiber is wound, and greatly reducing the fiber breakage rate. 2. In the three-layer composite structure, the PVC light-blocking base layer ensures the light-blocking effect, the polyester fiber foam buffer middle layer provides flexible protection for the optical fiber, and the TPU light-transmitting surface layer (light transmittance ≥90%) ensures a clear starry sky effect; the glass fiber support keel (spaced 10-15cm) embedded in the buffer middle layer can enhance the lateral rigidity of the roller blind, making it less prone to wrinkles when rolled up, reducing the alignment error of the starry sky pattern after unfolding, and improving visual consistency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the shell of this utility model; Figure 3This is a schematic diagram of the structure of the roller blind fabric of this utility model; Figure 4 This is a schematic diagram of the structure of the buffer middle layer of this utility model.

[0016] In the diagram: 1. Shell; 2. Roller blind fabric; 201. Light-blocking base layer; 202. Buffer middle layer; 203. Light-transmitting surface layer; 3. Slide rail; 4. Limiting plate; 5. Crossbar; 6. Slider; 7. Fiber optic bundle; 8. Support keel; 9. Lamp holder. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 This utility model provides a technical solution: A car-mounted starry sky roller blind mechanism, comprising: The main frame is fixed inside the sunroof roof interior. The main frame includes a shell 1, a slide rail 3 and a limiting plate 4. The slide rail 3 is provided between the two ends of the shell and the two ends of the limiting plate 4. The shell 1 is long and narrow and forms an internal cavity. The roller blind 2 is installed inside the storage cavity of the outer casing. The roller blind 2 is wound around a winding shaft, which is also installed inside the storage cavity. A steel torsion spring is installed on the winding shaft to provide winding force. The roller blind 2 adopts a three-layer composite structure, consisting of a light-blocking base layer 201, a buffer middle layer 202, and a light-transmitting surface layer 203 from the inside out. The slide rail 3 extends along the length of the skylight. A U-shaped guide groove is provided on the inner side of the slide rail 3, and a wear-resistant nylon slider 6 is embedded in the guide groove. A crossbar 5 is fixedly connected to the front edge of the roller blind 2. The two ends of the crossbar 5 are hinged to the slider 6 of the guide rail 3, ensuring that the roller blind 2 moves smoothly along the slide rail 3.

[0019] The roller blind 2 is wound around the winding shaft inside the housing 1. The steel strip torsion spring on the winding shaft is twisted and stores force when the roller blind 2 is unfolded, and releases elastic potential energy when it is wound up, which helps to drive the winding shaft to rotate. The roller blind 2 adopts a three-layer composite structure with the optical fiber bundle 7 running through it. The crossbar 5 fixed at the front edge is hinged to the slider 6 of the slide rail 3. When the slider 6 moves along the guide groove, the crossbar 5 drives the roller blind 2 to unfold / wound synchronously, ensuring that the roller blind 2 always remains flat.

[0020] The light-shielding base layer 201 (PVC material) provides basic light-shielding function to prevent external light from interfering with the starry sky effect; the buffer middle layer 202 (polyester fiber foam material) provides flexible wrapping for the optical fiber bundle 7 and absorbs the compressive stress during winding; the light-transmitting surface layer 203 (TPU film, light transmittance ≥90%) ensures clear light output from the optical fiber and prevents the optical fiber from being directly exposed and damaged by friction; the crossbar 5 evenly transmits the force at the front end of the roller blind 2 to the sliders on both sides 6, so that the force is balanced when the roller blind 2 is unfolded / wound, reducing wrinkles caused by uneven local force, and indirectly protecting the optical fiber bundle 7 from being crushed by wrinkles.

[0021] The fiber optic bundle 7 has its input end integrated into the rear end of the housing 1, and its output end is evenly distributed and runs through the three-layer structure of the roller blind 2. The output end of the fiber optic bundle 7 is flush with the light-transmitting surface layer 203 (without protruding). The fiber optic bundle 7 extends in an "S" shaped path within the buffer middle layer 202 to avoid excessive stretching during winding. A lamp holder 9 is provided at the rear end of the housing 1, and an LED light group is provided in the lamp holder 9, including red, green, and blue LED chips (color temperature adjustable from 2700K to 6500K). It is coupled to the input end of the fiber optic bundle 7 through a focusing lens. The fiber optic bundle 7 uses PMMA optical fiber with a diameter of 0.1-0.3mm.

[0022] The input end of the fiber optic bundle 7 is integrated at the rear end of the housing 1. It is coupled to the LED light group in the lamp holder 9 through a focusing lens. The light emitted by the LED light group (red, green, and blue chips) is focused by the focusing lens and enters the fiber optic bundle 7. The output end of the fiber optic bundle 7 passes through the three-layer structure of the roller blind 2 and is flush with the light-transmitting surface layer 203. The light is emitted from the output end to form starry sky light spots. The fiber optic bundle 7 extends in an "S" shaped path in the buffer middle layer 202. When it is rolled up, the roller blind 2 bends and causes the fiber to deform slightly along the "S" shaped path to avoid the fiber being overstretched. The LED light group has an adjustable color temperature (2700K-6500K) and can achieve a variety of starry sky color effects by mixing the three colors of light.

[0023] In summary, the built-in fiber bundle 7 and non-protruding output end completely solve the problem of friction and compression on the traditional "fiber attachment surface". Combined with the "S"-shaped path design, the fiber stretch is controlled within 5%, greatly reducing the breakage rate. The focusing lens concentrates the LED light to the input end of the fiber bundle 7, with a coupling efficiency of ≥95%, reducing light loss and ensuring uniform brightness of starlight spots. The three-color LED chips can be combined to produce a variety of colors, and with color temperature adjustment, it can meet users' different atmospheric needs such as "warm light starry sky" and "cool light starry sky", breaking through the limitations of traditional monochrome starry sky.

[0024] For a preferred implementation, please refer to Figure 1-4 : The light-shielding base layer 201 is made of PVC material with a thickness of 0.3-0.5mm. The buffer middle layer 202 is made of polyester fiber foam material with a thickness of 0.5-0.8mm. The light-transmitting surface layer 203 is made of TPU film with a light transmittance ≥90%.

[0025] The light-shielding base layer 201 is made of 0.3-0.5mm thick PVC material, which uses the high light-shielding properties of PVC (light-shielding rate ≥98%) to block strong external light; the buffer middle layer 202 is made of 0.5-0.8mm thick polyester fiber foam material, whose porous structure can absorb the vibration and compression stress during winding, while providing sufficient installation space for the optical fiber bundle 7; the light-transmitting surface layer 203 is made of TPU film, which ensures clear light output from the optical fiber with its high light transmittance (≥90%), and the TPU material is resistant to bending, making it suitable for the repeated winding of the roller blind 2.

[0026] In summary, the PVC light-blocking base layer 201 prevents external light from interfering with the starry sky effect, while the TPU light-transmitting surface layer 203 ensures that the light spots are clearly visible, resolving the contradiction between "light blocking and starry sky brightness"; the 0.5-0.8mm thick polyester fiber foam layer can reduce the compressive stress during winding, providing reliable flexible protection for the optical fiber bundle 7 and reducing the breakage of optical fibers due to stress concentration; the combination of the bending resistance of the TPU film and the anti-aging properties of PVC extends the service life of the roller blind 2 and reduces the replacement frequency.

[0027] For a preferred implementation, please refer to Figure 1-4 : The buffer middle layer 202 is embedded with support keels 8 at intervals. The spacing between adjacent support keels 8 is 10-15cm. The support keels 8 are made of glass fiber material with a diameter of 2-3mm. The support keels 8 extend along the width direction of the roller blind 2 to enhance the anti-wrinkle ability.

[0028] The support keel 8 (made of glass fiber with a diameter of 2-3mm) is embedded in the buffer middle layer 202 at intervals of 10-15cm along the width direction of the roller blind 2. The glass fiber material has the characteristics of high rigidity (bending strength ≥1000MPa) and low weight. When rolling up, the roller blind 2 drives the support keel 8 to bend synchronously. The support keel 8 limits the excessive wrinkling of the roller blind 2 through its own rigidity, so that the roller blind 2 always maintains a relatively flat rolled state. When unfolding, the support keel 8 can quickly return to straightness, driving the roller blind 2 to be laid flat.

[0029] In summary, the supporting keel 8 reduces the degree of wrinkles in the roller blind 2, preventing localized deformation or breakage of the fiber optic bundle 7 due to pressure caused by wrinkles, ensuring uniform distribution of starlight points, and reducing the alignment error of the star pattern after unfolding; the fiberglass keel enhances the lateral rigidity of the roller blind 2, reducing swaying caused by wind or vehicle bumps during unfolding, indirectly reducing the relative friction between the fiber optic bundle 7 and the roller blind 2, and extending the life of the fiber optics; the density of fiberglass is only 1 / 4 that of steel, which improves rigidity without significantly increasing the weight of the roller blind 2 (weight increase per meter ≤5g), avoiding increasing the burden on the drive motor.

[0030] It also includes a drive mechanism, which is used to drive the roller blind assembly to roll up / unroll down, including: The take-up shaft is located in the receiving cavity of the housing 1, and its two ends are connected to the housing 1 through rolling bearings. A spiral storage groove is opened on the surface (groove depth 0.8-1mm, pitch adapted to the thickness of the roller blind 2); the drive motor is a 12V DC permanent magnet motor (power 30-50W), which is connected to one end of the take-up shaft through a planetary gear reducer (reduction ratio 20:1), and outputs a torque of 5-8N·m; the transmission clutch is installed between the take-up shaft and the reducer, and automatically disengages when the roller blind 2 encounters resistance (resistance > 10N) to achieve anti-pinch protection.

[0031] The take-up shaft is connected to the housing 1 at both ends by rolling bearings to reduce rotational friction (friction coefficient ≤0.001). The spiral storage groove on the surface (groove depth 0.8-1mm, pitch adapted to the thickness of the curtain fabric 2) can guide the curtain fabric 2 to wind neatly and avoid mutual compression when multiple layers are wound. The drive motor (12V DC permanent magnet motor, 30-50W) reduces the speed from 3000-5000rpm to 150-250rpm through a planetary gear reducer (reduction ratio 20:1), while increasing the torque to 5-8N·m to provide sufficient power for the take-up shaft. The transmission clutch is installed between the take-up shaft and the reducer. When the curtain fabric 2 encounters resistance (resistance >10N), the clutch actively disengages and cuts off the power transmission to prevent motor overload or damage to the curtain fabric 2.

[0032] In summary, the spiral storage groove ensures uniform interlayer spacing when the roller blind 2 is wound, avoiding the pressure on the fiber bundle 7 caused by traditional "disordered winding". Combined with the low friction characteristics of the rolling bearing, the winding noise is low, improving the user experience. The torque increased by the gearbox can easily drive the roller blind 2 (including the fiber bundle 7) to wind up, avoiding jamming caused by insufficient torque and ensuring stable winding speed. The transmission clutch disengages when encountering resistance, avoiding the safety risks caused by pinching hands or foreign objects, and preventing the motor from burning out due to overload, thus improving the safety and durability of the mechanism.

[0033] This also includes a control unit, which includes: The MCU controller receives in-vehicle button or voice commands to control the forward and reverse rotation of the drive motor (winding / unwinding) and the switching, brightness (0-100% adjustable), color, and dynamic modes (such as starry sky flashing, meteor trails) of the LED light group; the ambient light sensor is installed on the dashboard to detect the ambient light intensity and automatically adjust the starry sky brightness (e.g., increase brightness by 30% in strong light and decrease it by 50% in low light); the wireless module supports Bluetooth or Wi-Fi connectivity and allows users to customize starry sky patterns (such as constellation distribution) via a mobile app.

[0034] The MCU controller receives signals from in-vehicle buttons, voice commands, or a mobile app (via a wireless module, Bluetooth / Wi-Fi connection) and outputs control commands: it sends forward and reverse signals to the drive motor to control the roll-up / unrolling of the curtain 2; it sends PWM signals to the LED light group to adjust the brightness (0-100% adjustable), color mixing ratio, and flashing frequency (to achieve dynamic modes such as starry sky flashing and meteor trails); the ambient light sensor detects the light intensity inside the vehicle and transmits the data to the MCU, which automatically adjusts the LED brightness (increasing by 30% in strong light to ensure the starry sky is visible, and decreasing by 50% in weak light to avoid glare); the wireless module supports mobile app connection, allowing users to customize starry sky patterns such as constellation distribution through the app. After the data is wirelessly transmitted to the MCU, the MCU controls the LED light group to light up the corresponding fiber bundle 7 according to the customized pattern.

[0035] In general, it has the following functions: Achieve intelligent interaction: Multiple command receiving methods (button, voice, APP) adapt to different usage scenarios, such as voice control while driving, and customization via APP when parking, improving the convenience of operation; Adaptive adjustment enhances the experience: The ambient light sensor's brightness adaptive function avoids frequent manual adjustments by the user, ensuring clear starry skies during the day and unobstructed driving visibility at night; Personalized Starry Sky Customization: The APP's customization function breaks through the limitations of the traditional "fixed starry sky pattern," allowing users to set their own exclusive starry sky (such as birthday constellation or specific star systems) according to their preferences, meeting the personalized needs of high-end vehicle users.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A star sky roller blind mechanism for a vehicle, characterized by comprising: include: The main frame is fixed inside the sunroof roof interior. The main frame includes a shell (1), a slide rail (3) and a limiting plate (4). The slide rail (3) is provided between the two ends of the shell and the two ends of the limiting plate (4). The shell (1) is long and has an internal cavity. The roller blind (2) is installed in the storage cavity of the outer shell. The roller blind (2) is wound on the winding shaft, which is installed in the storage cavity of the outer shell. A steel belt torsion spring is provided on the winding shaft to provide winding force. The roller blind (2) adopts a three-layer composite structure, which consists of a light-blocking base layer (201), a buffer middle layer (202), and a light-transmitting surface layer (203) from the inside to the outside. The fiber bundle (7) has its input end integrated at the rear end of the housing (1) and its output end evenly distributed and passing through the three-layer structure of the roller blind (2). The output end of the fiber bundle (7) is flush with the light-transmitting surface layer (203). The fiber bundle (7) extends in an "S" shaped path within the buffer middle layer (202) to avoid excessive stretching during winding.

2. The star sky roller blind mechanism for a vehicle according to claim 1, characterized in that: The thickness of the light-shielding base layer (201) is 0.3-0.5mm.

3. The automotive starry sky roller blind mechanism according to claim 1, characterized in that: The thickness of the buffer middle layer (202) is 0.5-0.8 mm.

4. The automotive starry sky roller blind mechanism according to claim 1, characterized in that: The light-transmitting surface layer (203) is configured as a TPU film structure, and the light transmittance of the light-transmitting surface layer (203) is ≥90%.

5. The automotive starry sky roller blind mechanism according to claim 1, characterized in that: The slide rail (3) extends along the length of the skylight, and a guide groove with a "U" shaped cross section is provided on the inner side of the slide rail (3). A wear-resistant nylon slider (6) is embedded in the guide groove.

6. The automotive starry sky roller blind mechanism according to claim 5, characterized in that: The roller blind (2) is fixedly connected to the front edge with a crossbar (5), and the two ends of the crossbar (5) are hinged to the slider (6) of the guide rail (3) to ensure that the roller blind (2) moves smoothly along the rail (3).

7. The automotive starry sky roller blind mechanism according to claim 1, characterized in that: The buffer middle layer (202) is embedded with support keels (8) at intervals, with a spacing of 10-15cm between adjacent support keels (8), and the support keels (8) extend along the width direction of the roller curtain (2).

8. The automotive starry sky roller blind mechanism according to claim 1, characterized in that: The rear end of the housing (1) is provided with a lamp holder (9), and the lamp holder (9) is provided with an LED lamp group, including red, green and blue LED chips. The LEDs are coupled to the input end of the optical fiber bundle (7) through a focusing lens. The optical fiber bundle (7) is made of PMMA optical fiber with a diameter of 0.1-0.3mm.

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