Automatic sunshade for car windows

Abstract

An automatic sunshade device for car windows with reasonable structure, low cost and large sunshade area suitable for use in cars. The device is composed of a housing, a reel arranged in the housing, a sunshade curtain that can be wound on the outer wall of the reel, a plurality of ribs for supporting the stretched sunshade curtain to be suspended in the car, and a driving device for driving the ribs to carry the sunshade curtain through the curtain access window arranged on the housing and extend outward. The driving mechanism is placed at the bottom frame position of the front and rear windows, and a tape measure steel belt with low cost, certain strength and windability is used as the supporting structure of the sunshade curtain. The tape measure steel belt is extended upward by manually or electrically driving the upper and lower driving rollers and unfolds the sunshade curtain, and finally covers the car window glass. When not in use, the sunshade curtain and the tape measure steel belt can be automatically rolled up together in the housing arranged at the bottom frame of the front and rear windows. The device is small in size, occupies little space, has good hiding performance and does not affect the driving vision.

Description

Technical Field

[0001] The invention relates to a sunshade cloth curtain for a vehicle, in particular to a sunshade cloth curtain which can be automatically retracted and used for a front window or a rear window of a vehicle. Background Art

[0002] With the sustained and rapid development of my country's economy and society, the rigid demand for cars is strong, and the number of cars in the country continues to grow rapidly. In 2014, the number of newly registered cars reached 21.88 million, and the number of cars in the country increased by 17.07 million, both of which are the highest levels in history. Nowadays, cars have become an essential travel tool for many families.

[0003] Nowadays, many cars are equipped with car sunshade curtains, which have the following advantages:

[0004] 1) Block ultraviolet rays: In the hot summer, the sun is shining brightly and the ultraviolet rays are strong. Ultraviolet rays are extremely harmful to human skin, central nervous system and eyes. Using it can effectively block more than 95% of harmful rays.

[0005] 2) Protect the accessories inside the car: When exposed to sunlight, the leather interior of the car will fade and deform severely. At this time, the sunshade curtain can effectively protect it from strong light.

[0006] 3) Protection of private life: In some special circumstances, people inside the car can use it to block the view outside the car and effectively protect the privacy of people inside the car.

[0007] 4) Energy saving and environmental protection, increasing driving comfort.

[0008] There are many varieties of sunshade curtains for cars on the market. Some directly use PVC curtains through small suction cups to absorb on the window glass, some use hanging type, and some use automatic sunshade devices.

[0009] Some of the products that use an automated lifting structure for sunshade have defects such as complex structure, high cost and occupying a lot of space in the vehicle. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide an automatic sunshade device for vehicle windows which has a reasonable structure, low cost and a large sunshade area and is suitable for use in vehicles.

[0011] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0012] The automatic sunshade device for vehicle windows of the present invention is characterized in that it consists of a shell, a drum arranged in the shell, a sunshade curtain that can be wound on the outer wall of the drum, a plurality of ribs for supporting the stretched sunshade curtain in a suspended manner in the vehicle, and a driving device for driving the ribs and the sunshade curtain to extend outward from the shell through a curtain entrance and exit window arranged on the shell, wherein the ribs are thin steel strips with a concave cross-section, the front end of which is fixedly connected to the outer edge of the sunshade curtain; the rear end of which is fixedly connected to the inner edge of the sunshade curtain and fixed together to the outer wall of the drum, or the rear end of the ribs is fixedly connected to a steel drum arranged in the shell and parallel to the drum.

[0013] The ribs are steel tapes, the shell is an integrated structure, the curtain entry and exit window is arranged on the shell wall of the shell, an upper drive roller and a lower drive roller are arranged in the shell, the sunshade curtain and the ribs pass through between the upper drive roller and the lower drive roller and are extended or retracted from the curtain entry and exit window, and the two ends of the roller shafts of the upper drive roller and the lower drive roller are respectively inserted into corresponding axial holes on the end covers arranged at both ends of the shell; the driving device is a hand-cranked handle connected to the upper drive roller or the lower drive roller, a wireless remote-controlled motor or a wire-controlled motor.

[0014] The convex surface of the ribs and the upper surface of the sunshade curtain are connected at multiple points or by lines.

[0015] The upper driving roller is an ellipsoidal rotating bead sleeved on the roller shaft, and the rib is a concave surface with an arc cross-section. The surface shape of the rotating bead is adapted to the arc concave shape of the rib. A positioning guide block for limiting the moving direction of the rib is provided near the rotating bead and between the rotating bead and the sunshade curtain. The curvature of the upper surface of the positioning guide block is adapted to the curvature of the arc concave surface of the rib.

[0016] The ribs are steel tapes, and the shell is a split structure consisting of an upper shell and a lower shell. The reel is placed inside the shell, and the curtain entrance and exit window is arranged on the shell wall. A steel reel support shaft and a pressure reel support shaft parallel to the reel are provided inside the shell. The steel reel is fixedly connected to the steel reel support shaft, and a rib rolling roller is fixedly connected to the pressure reel support shaft at a position opposite to the steel reel. The ribs pass through between the steel reel and the rib rolling roller and are extended or retracted from the curtain entrance and exit window together with the sunshade curtain.

[0017] The end covers arranged at both ends of the shell are composed of a cylinder cover and a shaft cover of a separate structure. A clamping hole is provided on the cylinder cover, and the end of the reel of the reel is inserted into the clamping hole; a first shaft sleeve hole and a second shaft sleeve hole are provided on the shaft cover, and the end of the steel coil support shaft is inserted into the first shaft sleeve hole, and the end of the pressure coil support shaft is inserted into the second shaft sleeve hole.

[0018] A tension spring capable of automatically adjusting the pressure exerted by the rib rolling roller on the steel reel is arranged between the steel reel support shaft and the pressure reel support shaft, and the steel reel support shaft and the pressure reel support shaft are connected via a gear transmission mechanism.

[0019] A notch is arranged on the outer edge of the sunshade curtain to avoid the rearview mirror bracket.

[0020] The straight line width of the cross section of the rib is between 1.5 cm and 2.5 cm.

[0021] An elastic pressing structure is arranged in the shell body, which can generate a relative pressure between the upper roller shaft and the lower roller shaft.

[0022] Compared with the prior art, the present invention places the driving mechanism at the bottom frame of the front and rear windows, and uses a low-cost steel tape with certain strength and pliability as the supporting structure of the sunshade curtain. The steel tape is extended upward by manually or electrically driving the upper and lower driving rollers and unfolds the sunshade curtain, finally covering the window glass. When not in use, it can automatically retract the sunshade curtain and the steel tape into a housing arranged at the bottom frame of the front and rear windows. The present invention is small in size, occupies little space, has good hiding performance, and does not affect the driving vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the schematic diagrams of the automatic sunshade device of the present invention after being unfolded.

[0024] Figure 2 for Figure 1 Enlarged view of the middle A part with the end cover opened (the shell is an integrated structure).

[0025] Figure 3 for Figure 1 Schematic diagram of the separation of the shell, reel and end cover.

[0026] Figure 4 for Figure 3 Enlarged view of part B in .

[0027] Figure 5 for Figure 4 Enlarged view of part C in .

[0028] Figure 6 for Figure 1 K-K section view.

[0029] Figure 7 for Figure 6 HH section view.

[0030] Figure 8 for Figure 7 Enlarged view of part D in the middle.

[0031] Fig. 9 for Figure 6Middle G-G section view.

[0032] Fig.10 for Fig. 9 Enlarged view of middle part E.

[0033] Fig.11 This is the second schematic diagram (explosion diagram) of the automatic sunshade device of the present invention after being unfolded.

[0034] Fig.12 for Fig.11 An enlarged schematic diagram of the middle L portion (the shell is a split structure).

[0035] Fig.13 for Fig.12 Middle SS cross-sectional view (after removing the shell).

[0036] Fig.14 for Fig.12 Middle T-T cross-sectional view (after removing the shell).

[0037] Fig.15 for Fig.12 Schematic diagram of the local explosion after the middle reel moves out of the lower shell.

[0038] Fig.16 for Fig.12 Schematic diagram of the relationship between the steel drum, reinforcing rollers, tension springs and gear transmission mechanism.

[0039] Fig.17 for Fig.12 Schematic diagram of the cylinder cover and shaft cover in FIG.

[0040] The reference numerals are as follows:

[0041] Shell 1, curtain cloth entrance and exit window 11, end cover 12, upper shell 13, lower shell 14, cylinder cover 15, shaft cover 16, first shaft sleeve hole 161, second shaft sleeve hole 162, snap-in position 163, snap-in hole 17, reel 2, positioning column 21, cylindrical shaft 22, end rotating drum 3, end guard plate 31, sleeve part 32, sleeve spring part 33, rotary torsion spring 34, reel 4, cylinder shell 41, cylinder wall window 42, rib 5, upper roller shaft 51, rotating bead 52, positioning guide block 53, steel reel support shaft 54, steel reel 55, pressure reel support shaft 56, rib rolling roller 57, lower roller shaft 58, lower driving roller 59, tension spring 6, gear transmission mechanism 7, notch 8, thin-diameter lever 81, sunshade cloth curtain 9. DETAILED DESCRIPTION

[0042] like Figure 1 - Fig.17As shown, the automatic sunshade device for a vehicle window of the present invention includes a long strip-shaped shell 1, a reel 4 installed in the shell 1 and having a sunshade curtain 9 wound thereon, a reel assembly receiving the reel 4, a steel coil assembly for supporting the unfolded sunshade curtain 9 and keeping the sunshade curtain 9 flat, and a driving mechanism for driving the sunshade curtain 9 to unfold.

[0043] The automatic sunshade device is installed on the bottom side of the window inside the car, wherein the unfolded sunshade curtain 9 is used to cover the front window glass or the rear window glass of the car to reduce the radiation of sunlight outside the car into the car.

[0044] The driving mechanism can be a hand-cranked driving mechanism, a wireless remote-controlled electric driving mechanism or a wired controlled motor driving mechanism. When in use, the sunshade curtain 9 can be driven by the driving mechanism to slowly move upward from bottom to top and cover the car window; when not in use, the driving mechanism applies a reverse driving force, and the sunshade curtain 9 is automatically retracted into the reel 4.

[0045] The shell 1 is in the shape of an elongated strip, with end covers 12 provided at both ends thereof. The shell 1 contains a cavity which can accommodate a reel, a reel assembly and a steel coil assembly. The shell wall of the shell 1 is provided with an elongated opening extending from one end of the shell 1 to the other end. The opening is hereinafter referred to as a curtain entrance and exit window 11. The length of the curtain entrance and exit window 11 is less than or equal to the length of the shell 1, and the curtain entrance and exit window 11 is used as a channel for allowing the sunshade curtain 9 rolled up in the shell 1 to extend from or be retracted into the shell 1.

[0046] The housing 1 is fixed at the lower frame of the vehicle window. The housing used in the automatic sunshade device for vehicle windows of the present invention is divided into two types: an integrated structure and a split structure, which are respectively introduced below.

[0047] 1. The shell is an integrated structure

[0048] 1. Shell

[0049] like Figure 1 - Figure 4 As shown, the housing 1 and the end cover 12 are integral structures, and the end cover 12 is divided into an end face and a side wall, and the side wall extends toward the housing 1 and is a closed loop structure. When it is assembled on the end of the housing 1, the side wall buckles on the outer wall of the end of the housing 1 and blocks the cavity. The reel 4 is suspended in the housing 1 and connected between the two end covers 12.

[0050] A snap-in hole 17 for supporting the end of the reel 2 of the reel and an axial hole of the drive roller are provided on the end surface of the end cover 12. The end of the reel 2 is inserted into the snap-in hole 17 and cannot rotate relative to each other.

[0051] 2. Reel 4

[0052] The reel 4 is made of hard material, such as Figure 4 , Figure 5As shown, it is a cylinder with an axial hollow channel and a cylindrical shape.

[0053] The reel 4 is placed in the cavity, and the inner edge of the sunshade curtain 9 (the innermost layer of the sunshade curtain 9 wound on the reel 4 and the longitudinal edge parallel to the axis of the reel 4 are the inner edges, and the outermost layer and the longitudinal edge parallel to the inner edge are the outer edges, the same below) is bonded and fixed to the outer wall of the reel 4. Most of the sunshade curtain 9 can be wound on the outer peripheral wall of the reel 4, and the outer edge of the sunshade curtain 9 is a free end, which passes through the curtain entrance and exit window 11 on the shell 1 and remains outside the shell 1.

[0054] The reel 4 is disposed between two end covers 12 of the housing 1 via the reel 2 .

[0055] 3. Scroll assembly

[0056] The function of the reel assembly is: on the one hand, it is used to install the reel 4 in the housing 1, and on the other hand, it is used to apply a rotational force to the sunshade curtain 9 that has extended out of the curtain access window 11 to roll it inward.

[0057] like Figure 4 , Fig. 9 As shown, the reel assembly consists of at least one reel 2, an end drum 3 sleeved on the reel, and a rotating torsion spring 34. The reel 2 is arranged at one end of the reel 4, and a supporting member that can support and rotate is arranged at the other end of the reel 4. The rotating torsion spring 34 is sleeved on the end drum 3.

[0058] 1) The reel 2 is composed of a positioning column 21 at the end and a cylindrical shaft 22. The cross-sectional shape of the positioning column 21 is rectangular, pentagonal, hexagonal or waist-shaped (waist-shaped means: a rectangle with two short sides being arc-shaped). The positioning column 21 is inserted into the clamping hole 17 set on the end cover, and the cylindrical shaft 22 is inserted into the reel.

[0059] 2) The end rotating drum 3 is an integral structural member, which is sleeved on the cylindrical shaft 22 of the reel 2 and can rotate around the cylindrical shaft 22. From the outside to the inside, it is composed of an end guard plate 31, a sleeve portion 32 and a sleeve spring portion 33. The end guard plate 31 is placed outside the reel 4, and the reel 4 is sleeved on the sleeve portion 32 and relatively fixed therebetween. The rotary torsion spring 34 is sleeved on the sleeve spring portion 33, and the sleeve portion 32 and the sleeve spring portion 33 are inserted into the reel 4.

[0060] The outer diameter of the end guard plate 31 is equal to or larger than the outer diameter of the drum 4 .

[0061] The outer diameter of the sleeve portion 32 is greater than the outer diameter of the sleeve spring portion 33. When the reel 2 is inserted into the reel 4, the sleeve portion 32 is tightly fitted with the inner wall of the reel 4. In order to improve the stability of the combination between the sleeve portion and the reel, an engaging structure is provided between the outer wall of the sleeve portion 32 and the inner wall of the reel 4 in the form of convex ribs or grooves.

[0062] The sleeve spring portion 33, the rotary torsion spring 34 is sleeved on the sleeve spring portion 33, one end of the rotary torsion spring 34 is hooked on the sleeve spring portion 33, and the other end is hooked on the winding shaft 2 (one end of the rotary torsion spring 34 can also be hooked on the inner wall of the winding drum 4, and the other end is hooked on the winding shaft 2).

[0063] When the end drum 3 and the winding drum 4 rotate with the winding shaft 2 as the axis (i.e., when the sunshade curtain 9 is driven to extend outward), the rotary torsion spring 34 stores the rotational energy formed by the reset rotational force. When the external force pulling the sunshade curtain 9 outward is released, under the action of the reset rotational force, the end drum 3 rotates in the opposite direction to retract the pulled out sunshade curtain 9 into the shell 1 and wind it around the outer wall of the drum 4.

[0064] 4. Steel coil components

[0065] like Figure 1 , Figure 7 , Figure 8 As shown, it is composed of a thin steel strip with a concave arc section and a roller. The thin steel strip is preferably a tape measure steel strip with a thickness of 0.085-0.1mm (8.5 filaments-10 filaments), preferably a 10-filament 50# first-class steel strip. The cross-sectional width of the tape measure steel strip (the straight line width after flattening the tape measure steel strip) is between 1.5 and 2.5cm, preferably 2.0cm.

[0066] The function of the thin steel belt is to cause the sunshade curtain 9 to extend from the curtain access window 11 in a flat manner and move horizontally from bottom to rear and upward to be suspended in the air, which plays a role in dynamic expansion and contraction and support for the sunshade curtain 9 (hereinafter referred to as the thin steel belt as rib 5).

[0067] The ribs 5 are arranged on the upper surface of the sunshade curtain 9 (referring to the surface opposite to the window glass after the sunshade curtain 9 is unfolded), and a plurality of the ribs 5 are arranged at intervals along the width direction of the sunshade curtain 9 (that is, when the sunshade curtain 9 is unfolded and covers the window, the direction on the sunshade curtain 9 corresponding to the width of the window), and the front end of each rib 5 (that is, when the sunshade curtain 9 covers the window, the upper part of the window is the front end, and the lower part is the rear end) is fixedly connected to the outer edge of the sunshade curtain 9, and the back side of the rib 5 (the concave surface on the rib 5 is the front side, and the convex surface is the back side, the same below) is in contact with the sunshade curtain 9.

[0068] The setting with the front side facing away from the sunshade curtain 9 can provide better support for the sunshade curtain 9, that is, when the ribs 5 extend upward, the concave surface of the ribs 5 faces upward. Due to the concave arc-shaped cross-section of the tape measure steel belt, it has a certain rigidity in the extension direction of the steel belt. Therefore, it can drive the sunshade curtain 9 to move upward, and when the sunshade curtain 9 is retracted, it has the property of being windable and can be rolled back into the shell 1.

[0069] like Figure 5 , Figure 6, Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, the rear end of the rib 5 is synchronously wound around the outer wall of the drum 4 with the sunshade curtain 9. In this case, the back of the rib 5 and the sunshade curtain 9 are fixedly connected at the contact point, and the connection therebetween forms a multi-point connection or a line connection, referred to as a line connection. The line connection can be made by bonding or sewing, thereby making the rib 5 and the sunshade curtain 9 integrated and wound together on the drum 4 when retracted.

[0070] In order to push out the ribs 5 smoothly and steadily, an upper driving roller and a lower driving roller 59 are provided inside the housing 1 on the inner side of the curtain entrance and exit window 11. The upper driving roller is parallel to the lower driving roller 59, and the sunshade curtain 9 and the ribs 5 pass through between the upper driving roller and the lower driving roller 59.

[0071] Both ends of the roller shafts of the upper driving roller and the lower driving roller 59 (respectively the upper roller shaft 51 and the lower roller shaft 58) are inserted into corresponding shaft holes provided on the end cover 12. In order to ensure that the upper roller shaft 51 and the lower roller shaft 58 rotate synchronously, a synchronous gear is provided at the end of the roller shaft.

[0072] In this method, the driving device is a manual rocker, a motor with a remote control or a wired controlled motor, and the driving device is connected to the upper driving roller or the lower driving roller 59. The upper driving roller or the lower driving roller 59 rotates and rolls the ribs 5 to carry the sunshade curtain 9 out of the curtain access window 11 and cover the car window, or rotates in the opposite direction to retract the extended and unfolded sunshade curtain 9 into the shell 1.

[0073] like Figure 5 , 9 As shown in Figures 10, a further improvement of the present invention is that a rotating bead 52 in an ellipsoidal shape (close to the shape of a shuttle for weaving) is sleeved on the upper driving roller (a plurality of rotating beads 52 are arranged at intervals on the upper roller shaft 51, and the specific number is the same as the number of ribs 5), and the surface curvature of the rotating bead 52 is basically adapted to the curvature of the front side of the rib 5 (i.e., the concave side of the rib 5) (the arc of the rotating bead is slightly larger than the arc of the rib 5, so as to better roll the rib 5); a positioning guide block 53 is provided at a position corresponding to the position of the rotating bead 52, which is installed on the upper edge of the curtain entry and exit window 11. The positioning guide block 53 is composed of two half blocks of a separated structure, and the top end surface of the positioning guide block 53 is fixedly connected to the shell at the curtain entry and exit window 11. The upper surface of the positioning guide block 53 is an arc surface with a curvature basically the same as the front side of the rib 5, and the rib 5 passes between the rotating bead 52 and the positioning guide block 53 that are connected by contact and pressure. This structure can improve the driving force of the upper driving roller and the lower driving roller 59 on the ribs 5, and can guide the ribs 5 to extend in a certain direction.

[0074] The lower driving roller 59 may also be a plurality of cylinders fixedly connected to the roller shaft. When the lower driving roller 59 is a plurality of cylinders, the length and setting position of each cylinder corresponds to a corresponding one of the rotating beads 52 .

[0075] In order to make a pressure between the upper roller 51 and the lower roller 58, the housing 1 can be set to a structure with a certain elastic pressure. In order to make the rib 5 passing through the rotating ball 52 and the lower driving roller 59 subject to a greater friction force generated by the lower driving roller 59, the structure can be: elastic pressure rods are respectively arranged on the upper wall and the lower wall of the housing, the lower end of the elastic pressure rod on the upper wall presses on the upper roller 51, and the upper end of the elastic pressure rod on the lower wall presses on the lower roller 58, thereby generating a pressure between the rotating ball 52 and the lower driving roller 59.

[0076] 2. The shell is a split structure

[0077] 1. Shell

[0078] like Fig.11 , Fig.12 , Fig.15 and Fig.17 As shown, the housing 1 is a split structure, which is composed of an upper shell 13 and a lower shell 14, and the end cover 12 is composed of two separate component assemblies, namely a cylinder cover 15 and a shaft cover 16.

[0079] The drum cover 15 is arranged at a position opposite to the end surface of the reel 4, and is provided with the above-mentioned engaging hole 17. The shaft cover 16 is provided with two first shaft sleeve holes 161 and second shaft sleeve holes 162 for supporting the shaft ends of the steel coil support shaft 54 ​​and the pressure coil support shaft 56 in the steel coil assembly, respectively. The end of the steel coil support shaft 54 ​​can rotate in the first shaft sleeve hole 161 and can move in the direction of the line between the first shaft sleeve hole 161 and the second shaft sleeve hole 162, and the end of the pressure coil support shaft 56 can rotate in the second shaft sleeve hole 162.

[0080] 2. Reel 4

[0081] The reel 4 is made of hard material, such as Fig.11 - Fig.15 As shown, it is a cylinder with an axial hollow channel and a cylindrical shape. The reel 4 is placed in the cavity through a cylinder shell 41 which is sleeved on the outside of the reel 4. A long strip of notch is opened on the shell wall of the cylinder shell 41, and the notch is referred to as the cylinder wall window 42 below. Similarly, the inner edge of the sunshade curtain 9 is wrapped and glued and fixed on the outer wall of the reel 4. Most of the sunshade curtain 9 can be wrapped around the outer circumferential wall of the reel 4. The outer edge of the sunshade curtain 9 is a free end extending from the cylinder wall window 42 and retained outside the shell 1 by the curtain entrance and exit window 11.

[0082] The reel 4 is arranged between two reel covers 15 through the positioning column 21 on the reel 2, and the reel covers 15 are buckled on both ends of the reel shell 41. A clamping position 163 is provided on the shaft cover 16 (the setting position of the clamping position can be set on the side of the shaft cover or on the lower shell 14 as needed), and the reel shell 41 can be quickly clamped on the clamping position 163.

[0083] 3. Scroll assembly

[0084] The reel assembly is also composed of a reel 2, an end drum 3 sleeved on the reel, and a rotary torsion spring 34. The structures, mutual relationships, and functions of the reel 2, the end drum 3, and the rotary torsion spring 34 are the same as those of the reel assembly described in the aforementioned "housing as an integrated structure". However, in this embodiment, the positioning column 21 on the reel 2 is inserted into the clamping hole 17 provided on the cylinder cover 15, and the reel 2 and the cylinder cover 15 are relatively fixed.

[0085] The cylinder cover 15 and the positioning column 21 can be configured as a whole, and the cylinder cover 15 can be buckled onto the cylinder shell 41 .

[0086] 4. Steel coil components

[0087] like Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 As shown, in this embodiment, the ribs 5 and the sunshade curtain 9 are separated structures, and a thin-diameter lever 81 for supporting is provided on the outer edge of the sunshade curtain 9, and the ribs 5 and the sunshade curtain 9 are connected only on the thin-diameter lever 81.

[0088] The rear end of the rib 5 is wound around another drum which is arranged parallel to the winding drum 4 and installed in the shell 1. When the sunshade curtain 9 is moved out and unfolded, the sunshade curtain 9 and the rib 5 are extended synchronously; when the sunshade curtain 9 is retracted into the shell 1, the rib 5 is wound around the outer wall of the drum, and the sunshade curtain 9 is wound around the outer wall of the winding drum 4.

[0089] In this way, in order to push out the ribs 5 smoothly and steadily, the steel coil support shaft 54 ​​and the pressure coil support shaft 56 are parallel and arranged on the side outside the reel 4 in the shell 1, and the roller is a plurality of steel reels 55 arranged at intervals on the steel coil support shaft 54. A rib rolling roller 57 is provided on the pressure coil support shaft 56 opposite to the steel reel 55, and the rib rolling roller 57 is pressed against the back of the ribs 5 wound on the steel reel 55.

[0090] Driven by the rib roller 57 and the steel drum 55 , the rib 5 carries the sunshade curtain 9 from the inside of the shell 1 through the curtain access window 11 to pass through the shell 1 , or carries the sunshade curtain 9 from the outside of the shell 1 to be retracted into the shell 1 .

[0091] As the shell is an integrated structure, the driving device is a manual rocker, a motor with remote control or a wire-controlled motor, and the driving device is connected to the steel roll support shaft 54 ​​or the pressure roll support shaft 56. The steel roll support shaft 54 ​​or the pressure roll support shaft 56 rotates and rolls the ribs 5 to carry the sunshade curtain 9 out of the curtain entrance and exit window 11 and cover the car window, or rotates in the opposite direction to retract the extended and unfolded sunshade curtain 9 into the shell 1.

[0092] After the ribs 5 wound on the steel reel 55 are gradually extended, in order to prevent the rib rolling roller 57 from breaking away from rolling the ribs 5, a tension spring 6 is provided between the steel roll support shaft 54 ​​and the pressure roll support shaft 56 so that the roller surface of the rib rolling roller 57 is always rolled on the surface of the ribs 5 wound on the steel reel 55.

[0093] In order to make the steel coil support shaft 54 ​​and the pressure coil support shaft 56 rotate simultaneously under the operation of the driving device, a gear transmission mechanism 7 connected by gear meshing is provided on the steel coil support shaft 54 ​​and the pressure coil support shaft 56.

[0094] It should be noted that the steel coil support shaft 54 ​​and the pressure coil support shaft 56 are rigidly connected at the gear meshing point, that is, the distance between the two gears is not adjustable. However, the setting of the tension spring 6 mentioned above means that the distance between the steel coil support shaft 54 ​​and the pressure coil support shaft 56 can be slightly changed (the change distance is about 2mm). Since the present invention uses thinner (the diameter of the steel coil support shaft 54 ​​and the pressure coil support shaft 56 is between 1mm-4mm) and elastic materials to make the steel coil support shaft 54 ​​and / or the pressure coil support shaft 56, and the radial thickness of the rib 5 wound on the steel reel 55 does not change much (the diameter change of the rib 5 when it is completely pulled out and when it is completely wound on the steel reel 55 is about 2mm), the deformation of the steel coil support shaft 54 ​​and the pressure coil support shaft 56 is negligible and does not affect its operation.

[0095] As another improvement to the above two structures, in order to avoid the influence (mainly blocking) of the rearview mirror bracket on the front window on the upwardly running sunshade curtain 9, a notch 8 for avoiding the rearview mirror can be provided on the outer edge of the sunshade curtain 9 corresponding to the rearview mirror bracket (see Figure 1 , Fig.11 shown).

Claims

1. An automatic sunshade device for a vehicle window, characterized in that: The vehicle comprises a long strip-shaped shell (1), a reel (4) arranged in the shell (1), a sunshade curtain (9) which can be wound on the outer wall of the reel (4), a plurality of ribs (5) for supporting the stretched sunshade curtain (9) to be suspended in the vehicle, and a driving device for driving the ribs (5) and the sunshade curtain (9) to extend outward from the shell (1) through a curtain access window (11) arranged on the shell (1), wherein the ribs (5) are thin steel strips with a concave cross section, the front end of which is fixedly connected to the outer edge of the sunshade curtain (9); the rear end of which is fixedly connected to the inner edge of the sunshade curtain (9) and fixed together to the outer wall of the reel (4), or the rear end of the ribs (5) is fixedly connected to a steel reel (55) arranged in the shell (1) and parallel to the reel (4); The curtain cloth inlet and outlet window (11) is arranged on the shell wall of the shell (1), and an upper driving roller and a lower driving roller (59) are arranged in the shell (1), the upper driving roller is a rotating bead (52) in the shape of an ellipsoid and sleeved on a roller shaft, the rib (5) is a concave surface with a circular arc cross-section, the surface shape of the rotating bead (52) is adapted to the circular arc concave surface shape of the rib (5), and a positioning guide block (53) for limiting the moving direction of the rib (5) is arranged near the rotating bead (52) and between the rotating bead (52) and the sunshade cloth curtain (9), and the upper surface curvature of the positioning guide block (53) is adapted to the curvature of the circular arc concave surface of the rib (5); Alternatively, the curtain entrance and exit window (11) is arranged on the shell wall of the shell (1), and a steel winding support shaft (54) and a pressure winding support shaft (56) parallel to the winding drum (4) are provided inside the shell (1); the steel winding drum (55) is fixedly connected to the steel winding support shaft (54), and a rib roller (57) is fixedly connected to the pressure winding support shaft (56) at a position opposite to the steel winding drum (55); the rib (5) passes between the steel winding drum (55) and the rib roller (57) and is extended or retracted from the curtain entrance and exit window (11) together with the sunshade curtain (9).

2. The automatic sunshade device for vehicle windows according to claim 1, characterized in that: The ribs (5) are steel tapes, the shell (1) is an integrated structure, the sunshade curtain (9) and the ribs (5) pass between the upper drive roller and the lower drive roller (59) and are extended or retracted from the curtain access window (11), and the two ends of the roller shafts of the upper drive roller and the lower drive roller (59) are respectively inserted into corresponding shaft holes on the end covers (12) arranged at the two ends of the shell (1); the driving device is a hand-cranked handle connected to the upper drive roller or the lower drive roller (59), a wireless remote-controlled motor or a wire-controlled motor.

3. The automatic sunshade device for vehicle windows according to claim 2, characterized in that: The convex surface of the rib (5) and the upper surface of the sunshade curtain (9) are connected at multiple points or by lines.

4. The automatic sunshade device for vehicle windows according to claim 1, characterized in that: The end covers (12) arranged at both ends of the shell (1) are composed of a cylinder cover (15) and a shaft cover (16) of a separate structure. The cylinder cover (15) is provided with a snap-in hole (17), and the end of the reel (2) of the reel (4) is inserted into the snap-in hole (17); the shaft cover (16) is provided with a first shaft sleeve hole (161) and a second shaft sleeve hole (162), and the end of the steel coil support shaft (54) is inserted into the first shaft sleeve hole (161), and the end of the pressure coil support shaft (56) is inserted into the second shaft sleeve hole (162).

5. The automatic sunshade device for vehicle windows according to claim 4, characterized in that: A tension spring (6) is provided between the steel coil support shaft (54) and the pressure coil support shaft (56) for automatically adjusting the pressure applied by the rib rolling roller (57) to the steel coil drum (55). The steel coil support shaft (54) and the pressure coil support shaft (56) are connected via a gear transmission mechanism (7).

6. The automatic sunshade device for vehicle windows according to claim 3 or 5, characterized in that: A notch (8) is provided on the outer edge of the sunshade curtain (9) to avoid the rearview mirror bracket.

7. The automatic sunshade device for vehicle windows according to claim 6, characterized in that: The straight-line width of the cross section of the rib (5) is between 1.5 cm and 2.5 cm.

8. The automatic sunshade device for vehicle windows according to claim 3, characterized in that: An elastic pressing structure is provided in the shell (1) and can generate a relative pressure between the upper roller shaft (51) and the lower roller shaft (58).

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