A sunshade curtain guide rail structure and a vehicle having the same

Abstract

The present application relates to the field of vehicle body, specifically a sunshade curtain guide rail structure and a vehicle with the same, comprising a guide rail body, a sliding unit is arranged on the guide rail body; the sliding unit comprises a sliding groove arranged on the guide rail body and a sliding strip structure arranged in the sliding groove; the sliding strip structure comprises a first sliding strip, a second sliding strip and a third sliding strip; the first sliding strip, the second sliding strip and the third sliding strip are plastic parts; the present application changes the traditional sunshade curtain guide rail structure through the optimized design of the sliding strip structure; the sliding strip structure comprises a first sliding strip, a second sliding strip and a third sliding strip; and the first sliding strip, the second sliding strip and the third sliding strip are plastic parts; the sharp abnormal noise caused by metal friction is eliminated from the root of the material; compared with the traditional metal guide rail, the plastic parts can play a good role in weight reduction and noise reduction in the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle bodies, specifically to a sunshade guide rail structure and a vehicle having the sunshade guide rail structure. Background Technology

[0002] Currently, car side window sunshades only have manual adjustment functions, while some high-end models have introduced electric sunshades.

[0003] The existing technical solutions have the following problems:

[0004] The large weight is due to the high proportion of aluminum alloy in the guide rail section.

[0005] The operation is noisy due to friction; the fabric seams of the sunshade curtain have high frictional resistance with the aluminum alloy; there is a high risk of the curtain getting tangled during winding, causing sluggish recovery and high maintenance costs.

[0006] Therefore, in order to improve or solve at least one of the above technical problems, it is necessary to optimize the design of the existing car window sunshade structure. Summary of the Invention

[0007] The purpose of this invention is to provide a lightweight and low-noise guide rail structure for sunshades.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A guide rail structure for a sunshade curtain includes a guide rail body, on which a sliding unit is provided;

[0010] The sliding unit includes a sliding groove provided on the guide rail body and a slide bar structure arranged in the sliding groove;

[0011] The slider structure includes a first slider, a second slider, and a third slider; the first slider, the second slider, and the third slider are all plastic parts.

[0012] The sliding groove includes a first sliding groove, a second sliding groove, and a third sliding groove; the first sliding groove is connected to the third sliding groove through the second sliding groove.

[0013] The third slide bar extends from the first slide groove through the second slide groove to the third slide groove;

[0014] The first slide bar and the second slide bar are arranged at a distance from each other in the third slide groove; the third slide bar is arranged between the first slide bar and the second slide bar; the third slide bar is movable relative to the first slide bar and the second slide bar.

[0015] The first slider includes a first slider body, and the first slider body has a support protrusion on the side near the third slider; the outer surface of the support protrusion is an arc-shaped surface;

[0016] The second slider includes a second slider body, and the contact area between the second slider body and the third slider adopts an arc-shaped transition.

[0017] Both the first and second sliders are connected to the guide rail body in a detachable manner.

[0018] The third slide bar includes an end slider and a third slide body; the end slider is connected in the first slide groove; the third slide body extends through the second slide groove to the third slide groove;

[0019] The third slide body includes three types of primary horizontal plates, three types of arc plates, and three types of secondary horizontal plates; one end of the three types of primary horizontal plates is connected to the end slider, and the other end is connected to the three types of arc plates; the three types of primary horizontal plates are connected to the three types of secondary horizontal plates through the three types of arc plates.

[0020] The first sliding body includes a primary pressure arc plate and end fastening plates; both ends of the primary pressure arc plate are connected to the guide rail body through an end fastening plate.

[0021] The second sliding body includes a secondary limiting plate, a secondary internal plate, and a secondary external plate; both ends of the secondary limiting plate are connected to the guide rail body through the secondary internal plate and the secondary external plate, respectively.

[0022] The three types of arc-shaped plates, the secondary limiting connecting plates, and the primary pressing arc-shaped plates are distributed in a relatively symmetrical manner.

[0023] The third groove is provided with a limiting mechanism, and the first slide bar and the second slide bar each correspond to at least one limiting mechanism;

[0024] Each of the limiting mechanisms includes two relatively spaced limiting protrusions; the first or second slide bar can be connected to the third groove via the limiting mechanism.

[0025] The first slide body and / or the second slide body are provided with a pressing mechanism, the pressing mechanism including a pressing protrusion provided on the first slide body or the second slide body; the first slide body or the second slide body can press against the inner wall of the third groove through the pressing protrusion.

[0026] The end fastening plate, the secondary limiting connecting plate, and the secondary external connecting plate all include L-shaped connecting plates; the L-shaped connecting plate includes a first connecting plate and a second connecting plate, which are arranged intersecting each other; the second connecting plate is connected to the primary abutment arc plate or the secondary limiting connecting plate through the first connecting plate; both the first connecting plate and the second connecting plate have at least one abutment protrusion.

[0027] The vertical cross-section of the secondary limiting plate is U-shaped; the connection between the secondary limiting plate and the secondary internal connecting plate and the secondary external connecting plate adopts an arc-shaped transition; the support protrusion is set on the primary pressure arc plate.

[0028] The materials of the pressure protrusions on the first connecting plate and the second connecting plate are the same or different; when the materials of the pressure protrusions on the first connecting plate and the second connecting plate are different, the material of the pressure protrusions on the first connecting plate is required to be rubber.

[0029] A vehicle includes a sunshade assembly, the sunshade assembly including a sunshade curtain and two guide rail structures for the sunshade curtain; a guide rail structure for the sunshade curtain is respectively connected to each side of the sunshade curtain; a third slide bar in the guide rail structure for the sunshade curtain is connected to the sunshade curtain.

[0030] The advantages of this invention are:

[0031] This invention discloses a guide rail structure for sunshades and a vehicle having the guide rail structure for sunshades.

[0032] This invention changes the traditional guide rail structure of sunshade curtains through the optimized design of the slider structure. The slider structure of this invention includes a first slider, a second slider, and a third slider; and the first slider, the second slider, and the third slider are all plastic parts; thus eliminating the sharp noise of metal friction from the material source.

[0033] Compared to traditional metal guide rails, plastic components can effectively reduce weight and lower interior noise.

[0034] In this invention, the first and second sliders are relatively fixed to the guide rail body, essentially serving as part of a traditional metal guide rail. The three sliders work together to provide operational guidance for the operation of the third slider.

[0035] The present invention features three types of arc-shaped plates: the outer surface of the supporting protrusion is arc-shaped, the contact area between the second and third slide bars uses an arc-shaped transition, and the third slide bar itself is also arc-shaped. This is equivalent to using arc-shaped contact to reduce the friction area, thereby achieving low frictional resistance and frictional noise.

[0036] Meanwhile, the three types of curved plates allow them to utilize the self-returning ability of the grooves when pressed together with the adjacent secondary limiting plates and the primary pressing curved plates, thus minimizing the risk of tangling when the sunshade is rolled up.

[0037] In this invention, the first and second slide bars are detachably connected to the guide rail body. This design can be modified as needed, increasing the applicability of the guide rail structure. It also simplifies the assembly process of the guide rail structure, improves production efficiency, and allows for quick and easy replacement of worn first or second slide bars during vehicle after-sales maintenance, eliminating the need to replace the entire aluminum alloy guide rail body and significantly reducing maintenance costs.

[0038] The third groove is equipped with a limiting mechanism (relatively distributed limiting protrusions) to prevent the first and second slide bars from detaching and locking. At the same time, the "pressure protrusions" on the first / second slide bars press against the inner wall of the groove to generate pre-tightening force. This dual protection of "limiting + pre-tightening" effectively eliminates the loosening or play caused by thermal expansion and contraction of plastic slide bars under long-term use or extreme temperature changes (-20℃~50℃), ensuring that the slide bars are always in close contact with the guide rail, maintaining guiding accuracy, and better reducing the problem of curtain deviation caused by loosening. Attached Figure Description

[0039] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0040] Figure 1 This is the first cross-sectional view of the guide rail structure in this invention.

[0041] Figure 2 This is a second cross-sectional view of the guide rail structure in this invention.

[0042] Figure 3 This is a schematic diagram of the sunshade assembly in this invention.

[0043] The markings in the above figures are all:

[0044] 1-1 Guide rail structure for sunshade curtain, 1. Guide rail body, 2. Sliding groove, 21. First sliding groove, 22. Second sliding groove, 23. Third sliding groove, 3. First sliding strip, 31. End fastening plate, 32. First-level pressure arc plate, 4. Second sliding strip, 41. Second-level limiting connecting plate, 42. Second-level internal connecting plate, 43. Second-level external connecting plate, 5. Third sliding strip, 51. End slider, 52. Third sliding body, 21. Third-level first-level horizontal plate, 522. Third-level arc plate, 523. Third-level second-level horizontal plate, 6. Limiting protrusion, 7. L-shaped connecting plate, 71. First connecting plate, 72. Second connecting plate, 8. Sunshade curtain, 9. Pressure protrusion. Detailed Implementation

[0045] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0046] Example 1:

[0047] A guide rail structure 1-1 for a sunshade curtain includes a guide rail body 1, which is an elongated strip extending along the edge of a vehicle side window. The guide rail body 1 is made of aluminum alloy profile through an extrusion molding process, featuring light weight and high strength. A sliding unit is provided on the guide rail body 1, which guides the side of the sunshade curtain 8 to reciprocate along the guide rail direction, thereby enabling the sunshade curtain 8 to unfold and retract.

[0048] The sliding unit includes a sliding groove 2 on the guide rail body 1 and a slider structure arranged in the sliding groove 2. The sliding groove 2 extends through the guide rail body 1 to accommodate and guide the third slider 5 to slide within it. The slider structure includes a first slider 3, a second slider 4, and a third slider 5, all of which are plastic parts, preferably made of polyoxymethylene or nylon material through injection molding. The all-plastic slider structure design eliminates the sharp noise generated by metal-to-metal or metal-to-plastic friction in traditional metal guide rails from the material source. Furthermore, the density of plastic material is much lower than that of aluminum alloy, effectively reducing the overall weight of the guide rail assembly and contributing to the lightweight design of the vehicle.

[0049] In this invention, the first slide bar 3 and the second slide bar 4 are connected to the guide rail body 1, and the first slide bar 3 and the second slide bar 4 cannot move relative to the guide rail body 1; while the third slide bar 5 can move relative to the first slide bar 3 and the second slide bar 4; in this invention, the first slide bar 3 and the second slide bar 4 are made of polyoxymethylene; and the third slide bar 5 is made of nylon.

[0050] In this invention, the sliding groove 2 includes a first sliding groove 21, a second sliding groove 22, and a third sliding groove 23. The sliding groove 2 of this invention is mainly a three-section groove structure. The first sliding groove 21 is connected to the third sliding groove 23 through the second sliding groove 22. In this invention, the width of the first sliding groove 21 is greater than the width of the second sliding groove 22, and the width of the third sliding groove 23 is greater than the width of the first sliding groove 21. This arrangement of the first sliding groove 21, the second sliding groove 22, and the third sliding groove 23 together constitutes a continuous sliding track space with a stepped cross-section. In this invention, the main body of the sliding groove 2 is C-shaped, that is, it is connected to the side of the guide rail body 1. Specifically, the first sliding groove 21 is located on the side of the guide rail body 1 furthest from the sunshade 8. It is mainly used to arrange the third sliding strip 5, and the installation limit of the third sliding strip 5 can be achieved by the change in the cross-sectional width of the first sliding groove 21 and the second sliding groove 22.

[0051] In this invention, the first slide groove 21 is used to accommodate the end slider 51 of the third slide bar 5 and provide lateral movement restraint and limitation; the third slide groove 23 is located in the area of ​​the guide rail body 1 near the center of the vehicle, that is, near the curtain of the sunshade 8, and is used to accommodate the main body of the first slide bar 3, the second slide bar 4 and the third slide bar 5; the second slide groove 22 is a narrow channel connecting the first slide groove 21 and the third slide groove 23, and its width is smaller than the width of the first slide groove 21 and the third slide groove 23, playing a dual role of limiting and guiding.

[0052] The third slide bar 5 extends from the first slide groove 21 through the second slide groove 22 to the third slide groove 23. Specifically, the end slider 51 of the third slide bar 5 is slidably connected in the first slide groove 21. The cross-sectional dimension of the end slider 51 is larger than the opening width of the second slide groove 22, thereby ensuring that the third slide bar 5 will not come out of the first slide groove 21 when subjected to winding tension, thus playing a role in preventing detachment and anchoring. The third slide body 52 of the third slide bar 5 extends through the second slide groove 22 to the third slide groove 23. The third slide body 52 is fixedly connected to the side of the sunshade curtain 8, thereby transmitting the movement of the curtain fabric to the slide bar structure.

[0053] The first slide bar 3 and the second slide bar 4 are arranged at intervals in the third slide groove 23, facing each other along the width direction of the third slide groove 23; in the attached figure, they are arranged longitudinally. The first slide bar 3 and the second slide bar 4 are distributed at intervals, and essentially, the first slide bar 3 and the second slide bar 4 serve as part of the guide rail body 1, guiding the operation of the third slide bar 5. The first slide bar 3 and the second slide bar 4 form a double-sided guide space between each other. The third slide bar 5 is arranged between the first slide bar 3 and the second slide bar 4. Specifically, the third slide body 52 of the third slide bar 5 is located in the gap between the first slide bar 3 and the second slide bar 4, and the third slide bar 5 can slide freely relative to the first slide bar 3 and the second slide bar 4 along the length direction of the guide rail body 1. The first slide bar 3 and the second slide bar 4, as fixed guide members, limit and guide the sliding of the third slide bar 5, ensuring that the third slide bar 5 always moves along a predetermined straight trajectory to a certain extent, preventing the curtain from shifting laterally during the winding process.

[0054] The first slide bar 3 includes a first slide body that extends along the length of the guide rail body 1 and has a specific irregular cross-section. A support protrusion is provided on the side of the first slide body near the third slide bar 5, protruding towards the third slide bar 5. The outer surface of the support protrusion is an arc-shaped surface, preferably with a radius of two millimeters. When the third slide bar 5 slides between the first slide bar 3 and the second slide bar 4, one side surface of the third slide bar 5 forms line contact or a small area of ​​surface contact with the arc-shaped surface of the support protrusion. Compared to the traditional planar contact method, the arc-shaped surface design significantly reduces the contact area, thereby reducing frictional resistance and frictional noise.

[0055] The second slide bar 4 includes a second slide body, which also extends along the length of the guide rail body 1. The contact area between the second slide body and the third slide bar 5 adopts an arc-shaped transition surface, that is, the surface of the second slide body facing the third slide bar 5 is set as an arc-shaped surface structure, and the radius of the arc is preferably two millimeters. Through the interaction between the arc-shaped support protrusion on the first slide bar 3 and the arc-shaped transition surface on the second slide bar 4, the third slide bar 5 is clamped between the two arc-shaped surfaces, forming a double arc-shaped contact guiding mode. This double arc-shaped contact structure ensures that the third slide bar 5 always forms a low-friction coefficient frictional contact with the two arc-shaped surfaces during the sliding process, greatly reducing the sliding resistance, and avoiding the stick-slip vibration and abnormal noise caused by excessive surface pressure in traditional planar contact.

[0056] Both the first slide bar 3 and the second slide bar 4 are connected to the guide rail body 1 using a detachable connection method. The preferred detachable connection is a snap-fit ​​connection, where elastic hooks are provided on the first slide bar 3 and the second slide bar 4, and corresponding slots are provided on the guide rail body 1. Quick assembly and disassembly are achieved through the cooperation of the elastic hooks and slots. The advantages of this detachable connection method are: firstly, it simplifies the assembly process of the guide rail structure 1-1, eliminating the need for bolts, adhesives, and other auxiliary means, thus improving production efficiency; secondly, after long-term use of the vehicle, if the first slide bar 3 or the second slide bar 4 becomes worn, the worn slide bar can be disassembled and replaced individually without replacing the entire aluminum alloy guide rail body 1, significantly reducing after-sales maintenance costs. Furthermore, depending on different operating conditions and performance requirements, the first slide bar 3 or the second slide bar 4 can be replaced with different materials or different hardnesses, increasing the applicability and adjustability of the guide rail structure 1-1.

[0057] Of course, the above-mentioned snap-fit ​​connection can be omitted, and the mutual pressing of the pressing protrusion 9 and the inner wall of the third slide groove 23 can be used to achieve the interference fit between the first slide bar 3 and the third slide groove 23 and the second slide bar 4 and the third slide groove 23.

[0058] In this invention, the third slide bar 5 includes an end slider 51 and a third slide body 52. ​​The end slider 51 is connected in the first slide groove 21, and the cross-sectional shape of the end slider 51 matches the cross-sectional shape of the first slide groove 21, preferably circular, rectangular, or trapezoidal, to ensure that the end slider 51 can slide smoothly in the first slide groove 21. The width of the end slider 51 is greater than the opening width of the second slide groove 22 (from the attached drawings, the maximum outer diameter of the end slider 51 is greater than the longitudinal height of the second slide groove 22), thereby playing a good lateral limiting role and preventing the third slide bar 5 from coming out of the first slide groove 21. The third slide body 52 extends through the second slide groove 22 to the third slide groove 23, and the third slide body 52 and the end slider 51 are integrally formed to constitute the complete third slide bar 5.

[0059] The third slide body 52 includes three types of primary horizontal plates 521, three types of arc-shaped plates 522, and three types of secondary horizontal plates 523. One end of the primary horizontal plate 521 is connected to the end slider 51, and the other end is connected to the arc-shaped plate 522. The primary horizontal plate 521 is a generally horizontally extending plate structure, and its width is adapted to the width of the second slide groove 22, requiring that the primary horizontal plate 521 can pass through the second slide groove 22 and slide within it. The arc-shaped plate 522 is a curved plate structure with an arc-shaped cross-section. One end of the arc-shaped plate 522 is connected to the primary horizontal plate 521, and the other end is connected to the secondary horizontal plate 523. The secondary horizontal plate 523 is a generally horizontally extending plate structure, and its extension direction is generally parallel to that of the primary horizontal plate 521, but the two are offset in the height direction, making the cross-section of the entire third slide body 52 stepped. The third-level horizontal plate 523 also serves as a connector, mainly to facilitate the installation and connection with the sunshade curtain 8.

[0060] The third-level horizontal board 523 is fixedly connected to the sunshade curtain 8. Specifically, the curtain edge can be sewn together with the third-level horizontal board 523 by sewing, or it can be fixed by gluing or heat pressing.

[0061] Through the aforementioned three-stage stepped variable cross-section structure, when the third slide bar 5 is subjected to the tension of the curtain roll-up, the end slider 51 is engaged in the first slide groove 21 as a force anchor point. The three types of first-level horizontal plates 521 pass through the narrow second slide groove 22 to act as a bridging transition, and the three types of second-level horizontal plates 523 support the curtain in the third slide groove 23. This structure ensures that the third slide bar 5 will not come out of the slide groove when subjected to tension, while the arc-shaped plate provides the necessary allowance for movement and bending compliance, ensuring both the reliability of the connection and the flexibility of movement.

[0062] The first sliding body includes a primary pressure arc plate 32 and end fastening plates 31. The primary pressure arc plate 32 is an arc-shaped plate structure extending along the length of the guide rail body 1, with supporting protrusions provided on it. Both ends of the primary pressure arc plate 32 are connected to the guide rail body 1 via end fastening plates 31. Specifically, the end fastening plates 31 are located at both ends of the first sliding body, and each end fastening plate 31 forms a detachable snap-fit ​​connection with the guide rail body 1. The primary pressure arc plate 32 is located between the two end fastening plates 31 and extends continuously along the length of the guide rail body 1, providing one side of arc-shaped guide support for the third sliding bar 5 during subsequent use.

[0063] The second sliding body includes a secondary limiting connecting plate 41, a secondary internal connecting plate 42, and a secondary external connecting plate 43. The secondary limiting connecting plate 41 is a plate-like structure extending along the length of the guide rail body 1, and its cross-section is U-shaped. That is, the middle area of ​​the secondary limiting connecting plate 41 is concave in the direction away from the third sliding strip 5 to form a U-shaped groove, and the bottom of the U-shaped groove is opposite to the third sliding strip 5. The connection between the secondary limiting connecting plate 41 and the secondary internal connecting plate 42 and the secondary external connecting plate 43 adopts an arc-shaped transition. That is, the two ends of the secondary limiting connecting plate 41 smoothly transition to the secondary internal connecting plate 42 and the secondary external connecting plate 43 through arc-shaped surfaces, respectively. This arc-shaped transition design avoids stress concentration and reduces frictional resistance when in contact with the third sliding strip 5. The two ends of the secondary limiting plate 41 are connected to the guide rail body 1 via the secondary internal connecting plate 42 and the secondary external connecting plate 43, respectively. The secondary internal connecting plate 42 and the secondary external connecting plate 43 both extend in a roughly vertical direction and are located on the inner and outer sides of the second slide body, respectively, serving to support the secondary limiting plate 41 in the third slide groove 23. The U-shaped structure of the secondary limiting plate 41 allows the second slide body to maintain sufficient structural strength while having a certain elastic deformation capacity, facilitating the installation and fixation of the second slide bar 4 on the guide rail body 1.

[0064] In this invention, the three types of arc-shaped plates 522, the secondary limiting connecting plate 41, and the primary pressing arc plate 32 are relatively distributed. Specifically, the three types of arc-shaped plates 522 are located in the middle, the primary pressing arc plate 32 is located on one side of the three types of arc-shaped plates 522, and the secondary limiting connecting plate 41 is located on the other side of the three types of arc-shaped plates 522, with their projections overlapping each other. Based on the accompanying drawings, it is required that the three types of arc-shaped plates 522 and the primary pressing arc plate can be horizontally projected onto the secondary limiting connecting plate 41. The three types of arc-shaped plates 522 and the primary pressing arc plate 32 have the same protrusion direction. This arrangement allows the primary pressing arc plate 32 to support and limit the three types of arc-shaped plates 522, reducing the risk of the sunshade 8 becoming entangled. The distance between the primary pressing arc plate and the secondary limiting connecting plate is slightly greater than the thickness of the three types of arc-shaped plates, ensuring that the two plates form a sliding fit with the three types of arc-shaped plates with a clearance fit.

[0065] In this invention, the U-shaped bottoms of the three types of arc plates 522, the first-level pressing arc plate 32, and the second-level limiting connecting plate 41 are opposite each other. The second-level limiting connecting plate 41 can support the three types of arc plates 522 on one side, and the first-level pressing arc plate 32 can support the three types of arc plates 522 on the other side. When the third slide bar 5 slides, the third slide bar 5 forms a low-friction line contact with the support protrusion on the first-level pressing arc plate 32 and the arc-shaped transition surface of the second-level limiting connecting plate 41, respectively. While guiding the third slide bar 5, it can also reduce the running resistance.

[0066] In addition, in this invention, the first slide bar 3, the second slide bar 4 and the third slide bar 5 are all stepped plate structures. This arrangement gives the first slide bar 3, the second slide bar 4 and the third slide bar 5 good self-deformation ability, which facilitates the assembly and disassembly of the first slide bar 3 and the second slide bar 4 in the third groove.

[0067] Meanwhile, the first slide bar 3 and the second slide bar 4, through the above design, can effectively constrain the movement posture of the third slide bar 5 in the third slide groove 23, preventing it from flipping or deviating. At the same time, by utilizing the normal component force generated by the arc surface when subjected to radial pressure, the third slide bar 5 can automatically return to the center position of the guide channel when a slight deviation occurs, playing a self-correcting and self-guiding role, effectively avoiding folding or entanglement failures caused by the curtain running off-center during the rolling up process of the sunshade curtain 8.

[0068] The third slide groove 23 is provided with a limiting mechanism, and the first slide bar 3 and the second slide bar 4 each correspond to at least one limiting mechanism. The limiting mechanism is used to divide the third slide groove 23 into sections, which are used to limit the installation of the first slide bar 3 and the second slide bar 4 within the third slide groove 23.

[0069] In the accompanying drawings of this invention, the limiting mechanism is used for longitudinal limiting, to fix the first slide bar 3 and the second slide bar 4 in a predetermined position along the height direction of the third slide groove 23, preventing the first slide bar 3 and the second slide bar 4 from disengaging in the third slide groove 23. Each limiting mechanism includes two relatively spaced limiting protrusions 6, which are distributed on two opposite side walls of the third slide groove 23. The two limiting protrusions 6 are equivalent to forming protrusions on the inner wall of the third slide groove 23, thus serving as attachment points.

[0070] In this invention, the limiting mechanism cooperates with the inner wall of the third slide groove 23 to limit the installation of the first slide bar 3 and the second slide bar 4 in the third slide groove 23.

[0071] In this invention, when the first slide bar 3 or the second slide bar 4 is engaged between the two limiting protrusions 6, the limiting protrusions 6 form a hook-and-limit mechanism for the first slide bar 3 or the second slide bar 4, preventing it from moving along the width (height in the attached drawing) of the third slide groove 23. Simultaneously, the two limiting protrusions 6 act as hook-like blocks, preventing the first slide bar 3 or the second slide bar 4 from dislodging along the thickness direction. Preferably, the limiting protrusions 6 are integrally formed with the guide rail body 1, meaning the structure of the limiting protrusions 6 is directly formed during the extrusion molding process of the aluminum alloy guide rail body 1, without the need for additional processing or assembly.

[0072] The first or second slide body is provided with a pressing mechanism, which includes a pressing protrusion 9 on the first or second slide body. The pressing protrusion 9 protrudes outward from the surface of the first or second slide body. When the first or second slide body is assembled in the third slide groove 23, the top of the pressing protrusion 9 presses against the inner wall of the third slide groove 23, generating a certain preload between the first or second slide body and the inner wall of the third slide groove 23. At the same time, under long-term vehicle use or extreme temperature changes, the plastic slide strip may change size due to thermal expansion and contraction. The pressing protrusion 9 can compensate for this size change through its own elastic deformation, ensuring that the first slide strip 3 and the second slide strip 4 always maintain close contact with the inner wall of the third slide groove 23 and maintain stable guiding accuracy.

[0073] The end fastening plate 31, the secondary limiting connecting plate 41, and the secondary external connecting plate 43 all include L-shaped connecting plates 7. The L-shaped connecting plates 7 increase the size and area of ​​the end fastening plate 31, the secondary limiting connecting plate 41, and the secondary external connecting plate 43, thereby increasing the contact area between the end fastening plate 31, the secondary limiting connecting plate 41, and the secondary external connecting plate 43 and the third groove; at the same time, they provide additional installation positions for the abutting protrusions 9; and facilitate the arrangement of abutting protrusions 9 at multiple positions on the first slide bar 3 and the second slide bar 4.

[0074] In this invention, the L-shaped connecting plate 7 includes a first connecting plate 71 and a second connecting plate 72. The first connecting plate 71 and the second connecting plate 72 are intersecting, preferably intersecting approximately perpendicularly, so that the cross-section of the L-shaped connecting plate 7 is L-shaped. The second connecting plate 72 is connected to the first-level pressing arc plate 32 or the second-level limiting connecting plate 41 through the first connecting plate 71. Specifically, for the end fastening plate 31, one end of the first connecting plate 71 is connected to the first-level pressing arc plate 32, and the other end of the first connecting plate 71 is connected to the second connecting plate 72. The second connecting plate 72 extends in a generally vertical direction, and the end of the second connecting plate 72 is provided with a hook structure for forming a snap-fit ​​engagement with the slot on the guide rail body 1. For the secondary limiting plate 41, one end of the first connecting plate 71 is connected to the secondary limiting plate 41, and the other end of the first connecting plate 71 is connected to the second connecting plate 72. The second connecting plate 72 extends in a generally vertical direction, and its end is also provided with a hook structure for engaging with the slot on the guide rail body 1. For the secondary external connecting plate 43, its structure is similar to that of the end fastening plate 31, and it also includes an L-shaped connecting plate 7, which forms a snap-fit ​​connection with the guide rail body 1.

[0075] Both the first connecting plate 71 and the second connecting plate 72 have at least one abutting protrusion 9. The abutting protrusion 9 protrudes outward from the surface of the first connecting plate 71 or the second connecting plate 72. When the L-shaped connecting plate 7 is engaged in the corresponding position of the third sliding groove 23, the abutting protrusion 9 presses against the inner wall of the third sliding groove 23, generating an auxiliary pre-tightening force. The simultaneous provision of abutting protrusions 9 on the first connecting plate 71 and the second connecting plate 72 ensures that pre-tightening force is generated on both mutually perpendicular surfaces of the L-shaped connecting plate 7, forming a bidirectional elastic pre-tightening effect, which further enhances the assembly stability of the first sliding bar 3 and the second sliding bar 4 in the third sliding groove 23.

[0076] The secondary limiting plate 41 has a U-shaped vertical cross-section, meaning the opening of the U-shape faces the third slider 5. The connection points between the secondary limiting plate 41 and the secondary internal connecting plate 42 and the secondary external connecting plate 43 use an arc-shaped transition, allowing the two ends of the secondary limiting plate 41 to smoothly connect to the secondary internal connecting plate 42 and the secondary external connecting plate 43. This avoids stress concentration caused by right-angle connections and makes the overall structure of the second slider 4 more flexible.

[0077] The support protrusion is set on the first-level pressure arc plate 32. Specifically, the support protrusion is a protrusion set on the outer surface of the first-level pressure arc plate 32. It is formed by bending and protruding towards the third sliding strip 5. The support protrusion and the first-level pressure guard plate are generally designed as an integral structure, or it can be designed as a post-installed structure as needed. The purpose of the support protrusion is to reduce the contact area with the third sliding strip 5. Therefore, the above design can reduce the operating friction of the sunshade curtain 8.

[0078] In this invention, the materials of the pressing protrusions 9 on the first connecting plate 71 and the second connecting plate 72 may be the same or different. When the materials of the pressing protrusions 9 on the first connecting plate 71 and the second connecting plate 72 are different, the material of the pressing protrusions 9 on the first connecting plate 71 is required to be rubber. Specifically, the pressing protrusions 9 can be integrally injection molded from the same plastic material as the main body of the first sliding strip 3 or the second sliding strip 4, or they can be formed from different materials through two-color injection molding or insert injection molding. When rubber material is used as the pressing protrusions 9 on the first connecting plate 71, the rubber material has higher elasticity and damping characteristics, and can act as a micro-damping shock absorber between the first sliding strip 3 and the guide rail body 1. When the vehicle is driving on a bumpy road, the rubber pressing protrusions 9 can effectively absorb and attenuate the high-frequency micro-vibrations between the first sliding strip 3 and the guide rail body 1, avoid resonance noise, and further improve the quietness performance of the sunshade 8 in dynamic driving environments.

[0079] Example 2:

[0080] A vehicle includes a sunshade assembly disposed on the inner side of a side window for blocking sunlight entering the vehicle through the side window. The sunshade assembly includes a sunshade curtain 8 and two sunshade curtain guide rail structures 1-1, which are respectively disposed at the front and rear edges of the side window. Each side of the sunshade curtain 8 is connected to a sunshade curtain guide rail structure 1-1; that is, the left side of the sunshade curtain 8 is connected to the front guide rail structure 1-1, and the right side of the sunshade curtain 8 is connected to the rear guide rail structure 1-1. Both guide rail structures 1-1 extend vertically along the vehicle or, depending on the shape of the window, extend in an inclined direction, providing linear guidance for the unfolding and retraction of the sunshade curtain 8.

[0081] The sunshade curtain 8 is connected to the third sliding strip 5 in the guide rail structure 1-1. Specifically, the side of the curtain fabric of the sunshade curtain 8 is fixedly connected to the third sliding strip 5's secondary horizontal plate 523 by sewing, so that the side of the curtain fabric moves back and forth along the length of the guide rail structure 1-1 together with the third sliding strip 5. When the rewind motor of the sunshade curtain 8 is started, the rewind shaft rotates, driving the curtain fabric of the sunshade curtain 8 to move. The two sides of the curtain fabric respectively drive the third sliding strip 5 in the two guide rail structures 1-1 to slide along the guide rail. The first sliding strip 3 and the second sliding strip 4 guide and limit the sliding of the third sliding strip 5, ensuring that the curtain fabric always moves along the predetermined trajectory.

[0082] Because the vehicle uses the aforementioned sunshade guide rail structure 1-1, it has at least the following beneficial effects: First, the extensive use of plastic sliders in the guide rail structure 1-1 to replace metal contacts eliminates metal friction noise during the operation of the sunshade 8, improving the quietness of the cabin; Second, the multiple arc-shaped surface contact design significantly reduces the sliding resistance when the curtain is rolled up, reducing the motor load and extending the motor's service life; Third, the first slider 3 and the second slider 4 are detachably connected, facilitating production assembly and after-sales maintenance, reducing the overall lifespan of the vehicle. Fourth, the dual cooperation of the limiting mechanism and the pressing mechanism ensures the assembly stability and guiding accuracy of the slider under long-term use and extreme temperature conditions; Fifth, the relative distribution of the three types of arc plates 522, the secondary limiting connecting plate 41 and the primary pressing arc plate 32, and the design of two arc plates and one U-shaped plate, enables the three types of arc plates 522, the secondary limiting connecting plate 41 and the primary pressing arc plate 32 to self-correct, reduce or prevent entanglement and jamming failures when the sunshade curtain 8 is rolled up, and improve the reliability and service life of the sunshade curtain 8.

[0083] Example 3:

[0084] This invention discloses a guide rail structure 1-1 for sunshade curtains, mainly including a guide rail body 1, a first slide bar 3, a second slide bar 4, and a third slide bar 5. The guide rail body 1 is a lightweight aluminum structure. The first slide bar 3 and the second slide bar 4 are made of polyoxymethylene (POM) material, and the third slide bar 5 is made of nylon (PA66) material. The first slide bar 3 and the second slide bar 4 are assembled with the guide rail body 1 through a snap-fit ​​structure to form a double-sided guide space. The third slide bar 5 is connected to the seam edge of the sunshade curtain 8 by sewing, and the third slide bar 5 slides into the double-sided guide space. The supporting protrusion on the first slide bar 3 and the radius (R1 and R2) of the arc surface on the second slide bar 4 are R=2.0±0.2mm, and the contact surface angle θ=30°±2°.

[0085] The groove depth of the three types of arc plates 522 in the third slide bar 5 is 2±0.2mm, and the groove width is 6.0±0.2mm.

[0086] By configuring the first slider 3 and the second slider 4, the guide rail body 1 works in conjunction with the first slider 3 and the second slider 4 to achieve the function of a traditional guide rail. Furthermore, because the first slider 3 and the second slider 4 are made of plastic, the weight of the guide rail body 1 is reduced by 10.2%-12.5% ​​compared to a traditional all-aluminum alloy guide rail. At a winding speed of 0.5 m / s, the frictional resistance is reduced by 5.3 ± 0.5 N, and the operating noise is reduced by 1.2 ± 0.1 dB(A) (A-weighted, 20℃ ± 2℃, 50% ± 5% humidity test conditions; A-weighted is one of the most commonly used frequency weighting networks in acoustic measurements. It simulates the sensitivity of the human ear to different frequencies of sound (sensitive to 1000-5000 Hz, insensitive to low frequencies). In noise testing, the label "dB(A)" indicates that the decibel value is a value filtered by A-weighting, which is closer to the actual perception of human hearing).

[0087] In addition, in this invention, the materials of the first slider 3 and the second slider 4 can be replaced with polyamide (PA) or polyester (PET) engineering plastics, and the material of the guide rail body 1 (1) can be replaced with magnesium alloy or carbon fiber composite material, and the weight of the guide rail is reduced by ≥8% after replacement.

[0088] The arc contact surfaces of the first slide bar 3 and the second slide bar 4 reduce the coefficient of friction from 0.45±0.05 in traditional metal guide rails to 0.12±0.02. After 5000 consecutive winding cycles within a temperature range of -20℃ to 50℃, no entanglement failure occurs, and the guiding stability of the curtain fabric is ≥99.8%.

[0089] The guide rail structure 1-1 disclosed in this invention achieves lightweight, low sliding resistance, low operating noise, and recyclability through the cooperation of the guide rail body 1 (aluminum), the first slide bar 3 (plastic: polyoxymethylene), the second slide bar 4 (plastic: polyoxymethylene), and the third slide bar 5 (plastic: nylon). The first slide bar 3 and the second slide bar 4 are independently detachable, and the pressing protrusions 9 on the first slide bar 3 and the second slide bar 4 play a role in locking and limiting to ensure the fixation of the slide bar.

[0090] The present invention includes a first slide bar 3, a second slide bar 4, and a third slide bar 5; all made of plastic. The first slide bar 3 and the second slide bar 4 serve as part of the traditional guide rail structure 1-1, and together with the guide rail body 1, they guide and limit the movement of the third slide bar 5.

[0091] Replacing the metal sections of traditional guide rails with plastic parts can reduce the overall mass of the guide rail structure; weight reduction is achieved by replacing steel with plastic.

[0092] In addition, the present invention utilizes arc contact to reduce the friction area, thereby achieving low frictional resistance and frictional noise.

[0093] The grooved design of the first slide bar 3, the second slide bar 4, and the third slide bar 5 solves the problem of "risk of fabric entanglement during winding". In this invention, the groove depth of the three types of arc plates 522 is 2mm, the width is 6.0mm, and the inclination angle is 100°. This design can utilize the self-returning ability of the groove when it is pressed together to reduce the risk of entanglement.

[0094] In summary:

[0095] This invention is a precision mechanical system designed around four core objectives: low friction, low noise, high reliability, and easy maintenance. It replaces the rigid friction of metal parts with the elasticity of plastic components, and replaces single-point rigid limits with multi-point, multi-directional flexible constraints.

[0096] The first slider 3 and the second slider 4 are made of polyoxymethylene (POM), and the third slider 5 is made of nylon (PA66), both of which are self-lubricating plastics. This material combination (POM + PA66) has a much lower friction than traditional metal solutions and is considered a "low-friction" golden combination among similar plastics. This selection eliminates the sharp noise of traditional metal friction pairs at the source, forming the first line of defense in the entire silent solution.

[0097] The supporting arc-shaped surface on the first slide bar 3 and the arc-shaped transition surface on the second slide bar 4 form a double-arc clamping guide structure on both sides of the third slide bar 5. This structure transforms the traditional surface-to-surface sliding contact into an approximate line contact state. The significant reduction in contact area brings three benefits: First, the sliding friction resistance is significantly reduced; second, when the third slide bar 5 experiences a slight deviation, it can automatically return to the center of the guide channel by relying on the normal component force of the arc-shaped surface, achieving a self-correcting function; third, the line contact form effectively eliminates the stick-slip vibration that may be generated by surface contact, further suppressing operating noise.

[0098] The sliding groove 2 is designed with a three-section stepped cross-section (the width of the first groove 21 is greater than that of the second groove 22, and the width of the third groove 23 is greater than that of the first groove 21). The third slide bar 5 is matched with it and adopts a stepped cross-section. The size of the slider 51 at the middle end of the third slide bar 5 is larger than that of the second groove 22. This enables mechanical locking and prevents the third slide bar 5 from detaching from the guide rail body 1. When the third slide bar 5 is subjected to the force of the curtain, its end slider 51 is restricted within the first groove 21, allowing only axial freedom along the guide rail direction. The radial escape path is completely blocked, providing a basic guarantee for the safe operation of the system.

[0099] The limiting mechanism and the pressing mechanism work together. The limiting mechanism precisely limits the final installation position of the first and second slide bars 4 in the width direction of the slide bar by setting relatively spaced limiting protrusions 6 on the inner wall of the third slide bar 23, preventing them from coming off during operation. The pressing mechanism utilizes the elasticity of the plastic parts to generate a bidirectional preload on the two mutually perpendicular surfaces of the L-shaped connecting plate 7, so that an elastic interference fit is formed between the plastic slide bar and the aluminum alloy groove wall.

[0100] Limiting protrusion 6 is responsible for blocking the final position, and pressing protrusion 9 is responsible for tightening to eliminate gaps.

[0101] The secondary limiting plate 41 of the second slide bar 4 adopts a U-shaped cross-section design, which is equivalent to having a limiting component built into the guide system. When the third slide bar 5 deviates or shifts due to uneven force on the curtain, the secondary limiting plate 41 can push the third slide bar 5 back to the guide center position. This gives the entire guide system self-adaptive capability and reduces folding or tangling failures caused by the sunshade curtain 8 running off-center.

[0102] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A guide rail structure for a sunshade curtain, characterized in that, Includes a guide rail body, on which a sliding unit is provided; The sliding unit includes a sliding groove provided on the guide rail body and a slide bar structure arranged in the sliding groove; The slider structure includes a first slider, a second slider, and a third slider; the first slider, the second slider, and the third slider are all plastic parts.

2. The guide rail structure for a sunshade curtain according to claim 1, characterized in that, The sliding groove includes a first sliding groove, a second sliding groove, and a third sliding groove; the first sliding groove is connected to the third sliding groove through the second sliding groove. The third slide bar extends from the first slide groove through the second slide groove to the third slide groove; The first slide bar and the second slide bar are arranged at a distance from each other in the third slide groove; the third slide bar is arranged between the first slide bar and the second slide bar; the third slide bar is movable relative to the first slide bar and the second slide bar.

3. The guide rail structure for a sunshade curtain according to claim 2, characterized in that, The first slider includes a first slider body, and the first slider body has a support protrusion on the side near the third slider; the outer surface of the support protrusion is an arc-shaped surface; The second slider includes a second slider body, and the contact area between the second slider body and the third slider adopts an arc-shaped transition.

4. The guide rail structure for a sunshade curtain according to claim 2, characterized in that, Both the first and second sliders are connected to the guide rail body in a detachable manner.

5. A guide rail structure for a sunshade curtain according to any one of claims 2 or 3, characterized in that, The third slide bar includes an end slider and a third slide body; the end slider is connected in the first slide groove; the third slide body extends through the second slide groove to the third slide groove; The third slide body includes three types of primary horizontal plates, three types of arc plates, and three types of secondary horizontal plates; one end of the three types of primary horizontal plates is connected to the end slider, and the other end is connected to the three types of arc plates; the three types of primary horizontal plates are connected to the three types of secondary horizontal plates through the three types of arc plates. The first sliding body includes a primary pressure arc plate and an end fastening plate; The first-level pressure arc plate is connected to the guide rail body at both ends by an end fastening plate; The second sliding body includes a secondary limiting plate, a secondary internal plate, and a secondary external plate; both ends of the secondary limiting plate are connected to the guide rail body through the secondary internal plate and the secondary external plate, respectively. The three types of arc-shaped plates, the secondary limiting connecting plates, and the primary pressing arc-shaped plates are distributed in a relatively symmetrical manner.

6. The guide rail structure for a sunshade curtain according to claim 5, characterized in that, The third groove is provided with a limiting mechanism, and the first slide bar and the second slide bar each correspond to at least one limiting mechanism; Each of the limiting mechanisms includes two relatively spaced limiting protrusions; the first or second slide bar can be connected to the third groove via the limiting mechanism.

7. The guide rail structure for a sunshade curtain according to claim 6, characterized in that, The first slide body and / or the second slide body are provided with a pressing mechanism, the pressing mechanism including a pressing protrusion provided on the first slide body or the second slide body; the first slide body or the second slide body can press against the inner wall of the third groove through the pressing protrusion.

8. The guide rail structure for a sunshade curtain according to claim 7, characterized in that, The end fastening plate, the secondary limiting connecting plate, and the secondary external connecting plate all include L-shaped connecting plates; the L-shaped connecting plate includes a first connecting plate and a second connecting plate, which are arranged intersecting each other; the second connecting plate is connected to the primary abutment arc plate or the secondary limiting connecting plate through the first connecting plate; both the first connecting plate and the second connecting plate have at least one abutment protrusion. The vertical cross-section of the secondary limiting plate is U-shaped; the connection between the secondary limiting plate and the secondary internal connecting plate and the secondary external connecting plate adopts an arc-shaped transition; the support protrusion is set on the primary pressure arc plate.

9. A guide rail structure for a sunshade curtain according to claim 8, characterized in that, The materials of the pressure protrusions on the first connecting plate and the second connecting plate are the same or different; when the materials of the pressure protrusions on the first connecting plate and the second connecting plate are different, the material of the pressure protrusions on the first connecting plate is required to be rubber.

10. A vehicle, characterized in that, The system includes a sunshade assembly, which includes a sunshade curtain and two sunshade curtain guide rail structures as described in any one of claims 1-9; a sunshade curtain guide rail structure is connected to each side of the sunshade curtain; and a third slide bar in the sunshade curtain guide rail structure is connected to the sunshade curtain.

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