Sunshade device for vehicle
By adopting a zigzag extension spring assembly and a pulley structure in the sunshade device, the problem of insufficient pre-extension of the tension spring in the prior art is solved, and stable operation and simplified manufacturing of the sunshade device are achieved.
Patent Information
- Application Number
- CN202422705193.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-06
AI Technical Summary
In existing sunshade devices, the pull cord may tend to loosen during the movement of the curtain. To avoid this tendency, the existing technology is difficult to achieve pre-stretching of the tension spring on a curtain with a smaller width, which makes the sunshade device prone to malfunction.
A zigzag extension spring assembly is adopted, which is connected in series through multiple tension spring segments, and a flexible rope and pulley structure is used to ensure that the tension spring assembly has a large pre-extension under a predetermined tension, thereby avoiding rope slack.
The invention effectively avoids the slackness of the draw cord of the sunshade device during the movement of the curtain, ensures the normal operation of the device, simplifies the manufacturing process and reduces noise and movement resistance.
Smart Images
Figure CN223370580U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a sunshade device for a vehicle. Background Art
[0002] Some vehicles are equipped with sunroofs, even panoramic sunroofs, to increase the light entering the vehicle and improve the field of vision of the vehicle occupants. However, in an environment with strong sunlight, the sunroof needs to be covered to reduce the light entering the vehicle.
[0003] A sunshade device can be installed over a skylight to block out light. A sunshade device typically consists of a curtain, a reel, two pulleys mounted on the reel, two pull cords, and a motor. The curtain is wound around the reel and has a free edge, where a tension spring is attached. The two pull cords are connected to the two pulleys and to both ends of the tension spring. A predetermined tension is applied to the tension springs, pre-stretching them and taut the two pull cords. The motor drives the reel and the pulleys simultaneously, releasing the curtain from the reel to unfurl and shade the skylight, while the pull cords wind up on the corresponding pulleys. Alternatively, the curtain winds up on the reel to reveal the skylight, and the pull cords are released from the corresponding pulleys.
[0004] When using a sunshade, the cord may sometimes slack as the curtain moves. In these situations, the pre-extension of the tension spring is continuously reduced to maintain cord tension and prevent malfunction of the sunshade. To prevent the pre-extension of the tension spring from reaching zero and causing cord slack during curtain movement, a large pre-extension is typically required. This requires a wide curtain width, which is difficult to achieve with smaller curtain widths. Utility Model Content
[0005] In response to the above technical problems, the present application proposes a sunshade device for a vehicle. The sunshade device comprises: a curtain having a free edge extending in a first direction; the free edge being adapted to move forward in a second direction perpendicular to the first direction to expand the curtain, or to move rearward in the second direction to retract the curtain; a tension rod extending in the first direction and disposed at the free edge; the tension rod comprising a tension spring assembly having a plurality of tension spring segments, the plurality of tension spring segments being arranged side by side and connected in series so as to form a zigzag extension; the tension spring assembly being pre-tensioned; and two tension cords, the first ends of the two tension cords being connected to the two ends of the tension spring assembly and being tensioned by the tension spring assembly; the two tension cords being adapted to retract as the free edge moves forward in the second direction, or to release as the free edge moves rearward in the second direction.
[0006] In one embodiment, each tension spring segment is an independent first tension spring; each first tension spring extends along the first direction, and multiple first tension springs are arranged side by side along the second direction; the corresponding ends of adjacent first tension springs along the second direction are connected by a flexible rope.
[0007] In one embodiment, the pull rod further includes a plurality of first pulleys, the plurality of first pulleys are arranged to correspond one to one to the plurality of flexible ropes, and the flexible ropes pass around the corresponding first pulleys.
[0008] In one embodiment, a first tension spring is disposed between two adjacent first pulleys along the first direction, and each first tension spring is spaced apart from the two adjacent first pulleys.
[0009] In one embodiment, the plurality of first tension springs are identical to each other.
[0010] In one embodiment, each first pulley is configured with a circumferentially extending first wheel groove, a pattern is provided on a surface of the first wheel groove; at least a portion of the flexible rope is located in the first wheel groove.
[0011] In one embodiment, the pull rod also includes a pull rod body; the pull rod body includes two edges extending along the second direction, and the two edges are opposite and spaced apart along the first direction; a plurality of mounting grooves are provided at each edge, and the two side walls of each mounting groove are respectively provided with limiting protrusions extending toward each other; a first pulley is provided in each mounting groove and the first pulley is limited by the limiting protrusion.
[0012] In one embodiment, the tension spring assembly is configured as a second tension spring extending in a zigzag manner.
[0013] In one embodiment, the pull rod further includes a plurality of second pulleys, which are spaced apart from each other along the first direction and / or the second direction; wherein the second tension spring extends around the plurality of second pulleys and extends in a zigzag manner, and each second pulley is adapted to rotate with the contraction of the second spring.
[0014] In one embodiment, each second pulley is configured with a circumferentially extending second wheel groove, and a pattern is provided on a surface of the second wheel groove; at least a portion of the second tension spring is located in the second wheel groove.
[0015] In one embodiment, the sunshade device also includes: a reel, carrying the curtain; two pulleys, respectively installed at both ends of the reel; the second ends of the two pull ropes are respectively connected to the two pulleys; and a driving member, connected to one end of the reel; wherein the driving member drives the reel to rotate, and the two pulleys rotate synchronously with the reel, so that the curtain is gathered onto the reel, and the two pull ropes are respectively released from the two pulleys, or the curtain is released from the reel and unfolded, and the two pull ropes are respectively gathered onto the two pulleys.
[0016] The beneficial effects of this application are as follows: According to the technical solution of this application, the tension spring assembly is zigzag-shaped. This reduces the length of the tension spring assembly while ensuring a large pre-extension. This makes it easy to install the tension spring assembly at the free edge of a narrow curtain. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described in the following detailed description by means of non-limiting examples of typical embodiments of the present invention, based on a number of accompanying drawings, which are not drawn to scale.
[0018] Figure 1 A vehicle according to one embodiment of the present application is schematically shown.
[0019] Figure 2 A schematic diagram of a sunshade device for a vehicle according to one embodiment of the present application is schematically shown, wherein the sunshade device includes the tension spring assembly of the first embodiment.
[0020] Figure 3 A portion of the pull rod body and the first pulley are schematically shown.
[0021] Figure 4 One edge of the tie rod body is shown schematically.
[0022] Figure 5 A tension rod body and a tension spring assembly of a second embodiment are schematically shown.
[0023] Reference Signs List
[0024] 1 vehicle
[0025] 11 skylight opening 12 roof panel
[0026] 2Sunshade device for vehicle
[0027] 201 driving member 202 reel
[0028] 203a first rope sheave 203b first rope sheave
[0029] 204a first pull rope 204b first pull rope
[0030] 206a first pulley set 206b second pulley set
[0031] 3 curtain fabric
[0032] 31 Free edge of the cord 32 Length edge of the cord
[0033] 4 tie rods
[0034] 41 first pulley 411 axle of the first pulley
[0035] 42 Second pulley
[0036] 42a first deflection pulley 42b second deflection pulley
[0037] 43 tie rod body
[0038] 431: length edge of the pull rod body 432: width edge of the pull rod body
[0039] 433 mounting groove 434 limiting protrusion
[0040] 44 extension spring assembly
[0041] 441 first tension spring 443 flexible rope
[0042] 442 second tension spring 442a first tension spring segment
[0043] 442b second tension spring section 442c third tension spring section
[0044] X first direction Y second direction DETAILED DESCRIPTION
[0045] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0046] Figure 1 A vehicle 1 according to an embodiment of the present application is schematically shown. Figure 1 As shown, a sunroof opening 11 is provided on a roof panel 12 of a vehicle 1, and a sunroof glass is provided at the sunroof opening 11. In order to shield the sunroof glass when necessary, a sunshade device 2 for a vehicle (hereinafter referred to as sunshade device 2) is also installed at the sunroof opening 11.
[0047] Next, the sunshade device 2 will be described.
[0048] Figure 2 The sunshade device 2 according to one embodiment of the present application is schematically shown. Figure 2 As shown, the sunshade device 2 mainly includes a driving member 201, a reel 202, two pulleys installed at both ends of the reel 202 (i.e., a first pulley 203a and a second pulley 203b), two pull ropes (i.e., a first pull rope 204a and a second pull rope 204b), a curtain 3 and a pull rod 4.
[0049] The driving member 201 is connected to the reel 202 to drive the reel 202 to rotate. The first rope pulley 203a and the second rope pulley 203b rotate synchronously with the reel 202 under the drive of the reel 202. In one embodiment, the driving member 201 can be a motor.
[0050] The curtain 3 is generally rectangular and has a first direction X (i.e., the width direction of the curtain 3) and a second direction Y (i.e., the length direction of the curtain 3). One end of the curtain 3 is wound on the winding shaft 202, and the curtain 3 has an opposite end along the X direction (i.e., a free edge 31 or width edge). The free edge 31 extends along the first direction X. In addition, the curtain 3 has two length edges 32 extending along the second direction Y.
[0051] The tension rod 4 is disposed at the free edge 31 of the curtain 3 to stretch the curtain 3 in the first direction X. A tension spring assembly 44 of the first embodiment is disposed on the tension rod 4. The tension spring assembly 44 is pre-stretched and has a pre-extension. The tension spring assembly 44 includes three first tension springs 441. Each first tension spring 441 extends in the first direction X, and the three first tension springs 441 are arranged side by side in the second direction Y. The corresponding ends of adjacent first tension springs 441 in the second direction Y are connected by a flexible rope 443 (i.e., the three first tension springs 441 are connected in series). In this way, the tension spring assembly 44 is in a zigzag extension state, and each first tension spring 441 forms a tension spring segment of the tension spring assembly 44.
[0052] The sunshade device 2 further includes two pulley sets (ie, a first pulley set 206a and a second pulley set 206b), and the two pulley sets are arranged along the first direction X on frames (not shown) located on both sides of the curtain 3.
[0053] The first pull rope 204a and the second pull rope 204b each extend in the second direction Y. The first pull rope 204a extends from the first end of the tension spring assembly 44, is redirected by the first pulley set 206a, and is then connected to the first rope pulley 203a. The second pull rope 204b extends from the second end of the tension spring assembly 44, is redirected by the second pulley set 206b, and is then connected to the second rope pulley 203b. In this way, the first pull rope 204a and the second pull rope 204b are tensioned by the tension spring assembly 44.
[0054] When the driver 201 rotates the reel 202 in a first direction (e.g., clockwise), the first and second pull ropes 204a, 204b move rearward in a second direction Y (i.e., toward the reel 202) and are wound onto the first and second pulleys 203a, 203b, respectively. The free edge 31 of the curtain 3 and the pull rod 4 are pulled forward in the second direction Y (i.e., away from the reel 202) by the two pull ropes, moving them away from the reel 202. The curtain 3 is released from the reel 202 and unrolls to cover the sunroof glass. When the driver 201 rotates the reel 202 in a second direction (e.g., counterclockwise), the curtain 3 is gradually retracted onto the reel 202, revealing the sunroof glass. At the same time, the free edge 205 of the curtain 3 and the pull rod 4 move backward toward the reel 202 along the second direction Y; the first pull rope 204a and the second pull rope 204b are released from the first pulley 203a and the second pulley 203b respectively and move forward along the second direction Y.
[0055] In one embodiment, the sunshade device 2 may further include two guide rails (not shown). The two guide rails are arranged to extend along the second direction Y and are respectively adjacent to the two longitudinal edges 32 of the curtain fabric 3. In this case, both ends of the pull rod are in sliding contact with the two guide rails, thereby causing the pull rod to slide along the two guide rails.
[0056] In the sunshade device 2 of the present application, a predetermined tension is applied to the tension spring assembly 44, resulting in a pre-extension. When the sunshade device 2 is in use (e.g., during movement of the curtain fabric 3), the tension spring assembly 44 applies tension to the first and second tension cords 204a, 204b to maintain tension, thereby preventing malfunction of the sunshade device 2.
[0057] In addition, the tension spring assembly 44 extends in a zigzag manner, so that when the tension spring assembly 44 has a large pre-extension amount, the length of the tension spring assembly 44 along the first direction X can still be small. Therefore, the zigzag extension spring assembly can be easily installed at the free edge of a curtain with a smaller width.
[0058] According to the sunshade device 2 of the present application, after a predetermined tensile force is applied to the tension spring assembly 44, the first tension springs 441 are all subjected to equal tension and stretched, so the total elongation of the tension spring assembly 44 is the sum of the elongations of the first tension springs 441. Compared with the technical solution in the prior art in which two tension cords are respectively connected to the two ends of a tension spring, when the predetermined tensile force is equal, the elongation of the tension spring assembly 44 of the present application is greater than the elongation of a single tension spring in the prior art. In other words, the tension spring assembly 44 of the present application has a longer elongation after a predetermined tensile force is applied. In this way, during the movement of the curtain 3, the tension spring assembly 44 can be effectively prevented from contracting to a non-stretched state (i.e., the elongation is reduced to zero), thereby preventing the sunshade device 2 from malfunctioning due to loose tension cords.
[0059] It should be understood that, depending on actual conditions, the number of the first tension springs may be two or more than three, as long as the tension spring assembly has the required elongation.
[0060] In one embodiment, these first tension springs 441 are identical. This facilitates calibration of the mechanical properties of the tension spring assembly 44. Furthermore, when manufacturing the sunshade device 2, there is no need to distinguish these first tension springs 44, thereby simplifying the manufacture of the sunshade device 2. Of course, the tension spring assembly can also be manufactured using first tension springs of various specifications, depending on practical needs.
[0061] The pull rod 4 also includes a pull rod body 43 and a plurality of first pulleys 41 arranged on the pull rod body 43. The pull rod body 43 is generally rectangular and includes a length edge 431 along the first direction X and a width edge 432 along the second direction Y. These first pulleys 41 are arranged to correspond one-to-one with a plurality of flexible ropes 443 (for example, these first pulleys 41 are arranged in two rows along the second direction Y, and the first pulleys 41 in the same row are spaced apart from each other). The flexible ropes 443 pass around the corresponding first pulleys 41. When the tension spring assembly 44 (or the first tension spring 441) contracts to pull the pull rope, the flexible rope 443 moves and the first pulleys 41 rotate accordingly. This reduces the movement resistance of the flexible rope 443, the tension spring assembly 44 can contract smoothly, and helps to reduce or avoid noise.
[0062] Furthermore, the first tension springs 441 are all arranged generally along the length of the pull rod body 43 (i.e., the first direction X). This allows for the use of longer first tension springs 441, while also providing ample space within the pull rod body 43 for each first tension spring 441 to be fully extended. This also helps ensure that the tension spring assembly 44 has a longer extension, preventing the tension cord from slacking during movement of the curtain 3. In some unillustrated embodiments, these first tension springs may also be arranged to extend generally along the second direction Y and be arranged side by side along the first direction X, which will not be further described here.
[0063] In one embodiment, the first pulley 41 is configured with a circumferentially extending first groove (not shown), within which at least a portion of the flexible cord 443 resides. The first groove retains the flexible cord 443, preventing it from escaping from the first pulley 41 and potentially causing a malfunction of the sunshade device 2. In one embodiment, a pattern (not shown) is provided on the surface of the first groove. This pattern increases friction between the flexible cord 443 and the first pulley 41, allowing the first pulley 41 to rotate as the tension spring assembly 44 contracts, further reducing the resistance to movement of the tension spring assembly 44.
[0064] Also like Figure 2 As shown, only one first tension spring 441 is disposed between two adjacent first pulleys 41 along the first direction X, and each first tension spring 441 is spaced apart from the two adjacent first pulleys 41. During the movement of the curtain 3, the first tension spring 441 remains spaced apart from the first pulleys 41. This prevents the first tension spring 441 from becoming stuck on the first pulleys 41, which could cause the tension spring assembly 44 to not retract properly and the tension cord to slack. In one embodiment, each first tension spring 441 can be centrally located between the two corresponding first pulleys 41, with a sufficient distance between each end of the first tension spring 441 and the corresponding first pulley 41. For example, the distance between the two first pulleys 41 is 400 mm, and the first tension spring 441, after being stretched, is centrally located between the two first pulleys 41. The stretched length of the first tension spring 441 is 350 mm, resulting in a 25 mm gap between the ends of the first tension spring 441 and the adjacent first pulley 41. For a curtain with a travel length less than or equal to 1400 mm, the first tension spring arranged in this manner will not come into contact with the corresponding first pulley during the movement of the curtain.
[0065] Reference Figure 3 and Figure 4 , a plurality of mounting grooves 433 are provided at each width edge 432 of the pull rod body 43; a first pulley 41 is provided in each mounting groove 433. Figure 4 As shown, each mounting slot 433 is provided with two sidewalls with mutually extending stop protrusions 434. When the first pulley 41 is installed, the axle 411 of the first pulley 41 pushes the two stop protrusions 434 aside and enters the mounting slot 433. The two stop protrusions 434 then return to their original position and retain the axle 411 of the first pulley 41 within the mounting slot 433, preventing the first pulley 41 from disengaging from the mounting slot 433 or the pull rod body 43. In one embodiment, the pull rod body 43 is made of a plastic with suitable elasticity (e.g., nylon) so that the two stop protrusions 434 can be easily pushed apart and automatically return to their original position.
[0066] Figure 5 The tension spring assembly of the second embodiment is schematically shown. Figure 5 As shown, two second pulleys 42 (i.e., a first deflection pulley 42a and a second deflection pulley 42b) are provided on the pull rod body 43, with the two second pulleys 42 spaced apart along the first direction X. The tension spring assembly of the second embodiment is constructed as a single, complete second tension spring 442. The second spring 442 extends around the two second pulleys 42, thereby extending in a zigzag pattern. Thus, the second spring 442 is divided into three tension spring segments by the first deflection pulley 42a and the second deflection pulley 42b: a first tension spring segment 442a located between the first pull rope 204a and the first deflection pulley 42a, a second tension spring segment 442b located between the first deflection pulley 42a and the second deflection pulley 42b, and a third tension spring segment 442c located between the second pull rope 204b and the second deflection pulley 42b.
[0067] The second tension spring 442 of the second embodiment is longer, so that the second tension spring 442 has a longer pre-extension when pre-stretched. During the movement of the curtain 3, the pre-extension of the second tension spring 442 can be effectively prevented from being reduced to zero.
[0068] The two second pulleys 42 can be arranged to face each other along the first direction X, which reduces the space requirement of the two second pulleys 42 along the second direction Y to accommodate the smaller width of the pull rod body 43. It should be noted that in this case, the two second pulleys 42 cannot hinder the contraction of the second tension spring 442.
[0069] The second tension spring 442 is in frictional contact with each second pulley 42. Thus, when the second tension spring 442 contracts, the second pulley 42 also rotates. This reduces the movement resistance of the second tension spring 442 and helps reduce or avoid the noise generated by the second tension spring 442 during movement.
[0070] It should be understood that the larger the diameter of the second pulley 42, the smaller the resistance to the second tension spring 442, which is more conducive to the contraction of the second tension spring 442. In one embodiment, the diameter of the second pulley 42 is about 45 mm. In addition, due to the large diameter of the second pulley 42, the second pulley 42 is usually set to be spaced apart from the end of the pull rod body 43 (such as Figure 5 Of course, the second pulley 42 may also be disposed at the edge of the pull rod body 43 according to actual conditions.
[0071] Depending on practical circumstances, multiple second pulleys may be provided on the pull rod body, with the plurality of second pulleys spaced apart from one another along the first and second directions. For example, the second pulleys may be arranged in two rows along the second direction Y, with the second pulleys in the same row spaced apart from one another. The second tension spring may extend in a zigzag pattern, bypassing all or some of the second pulleys.
[0072] In one embodiment, the second pulley 42 is configured with a circumferentially extending second groove (not shown), with at least a portion of the second tension spring 442 positioned within the second groove. The second groove retains the second tension spring 442, preventing it from detaching from the second pulley 42. In one embodiment, a pattern (not shown) is provided on the surface of the second groove. The pattern increases friction between the second tension spring 442 and the second pulley 42, so that when the second tension spring 442 contracts, the second pulley 42 rotates accordingly, further reducing the resistance of the second tension spring 442 to movement.
[0073] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.
Claims
1. A sunshade device for a vehicle, characterized in that: The sunshade device comprises: A curtain having a free edge extending in a first direction; the free edge being adapted to move forward in a second direction perpendicular to the first direction to unfold the curtain, or being adapted to move backward in the second direction to retract the curtain; a pull rod extending in the first direction and disposed at the free edge; the pull rod comprising a tension spring assembly having a plurality of tension spring segments, the plurality of tension spring segments being arranged side by side and connected in series so that the tension spring assembly is in a zigzag extension state; the tension spring assembly being pre-stretched; and Two pull ropes, the first ends of the two pull ropes are respectively connected to the two ends of the tension spring assembly and are tensioned by the tension spring assembly; the two pull ropes are suitable for being retracted as the free edge moves forward along the second direction, or are suitable for being released as the free edge moves backward along the second direction.
2. The sunshade device according to claim 1, characterized in that: Each of the tension spring segments is an independent first tension spring; each of the first tension springs extends along the first direction, and a plurality of the first tension springs are arranged side by side along the second direction; the corresponding ends of the adjacent first tension springs along the second direction are connected by a flexible rope.
3. The sunshade device according to claim 2, characterized in that: The pull rod further includes a plurality of first pulleys, which are arranged to correspond one-to-one to the plurality of flexible ropes, and the flexible ropes are passed around the corresponding first pulleys.
4. The sunshade device according to claim 3, characterized in that: One first tension spring is disposed between two adjacent first pulleys along the first direction, and each first tension spring is spaced apart from two adjacent first pulleys.
5. The sunshade device according to claim 2, characterized in that: The plurality of first tension springs are identical to each other.
6. The sunshade device according to claim 3, characterized in that: Each of the first pulleys is configured with a circumferentially extending first wheel groove, with a pattern provided on a surface of the first wheel groove; at least a portion of the flexible rope is located in the first wheel groove.
7. The sunshade device according to claim 3, characterized in that: The pull rod further includes a pull rod body; the pull rod body includes two edges extending along the second direction, the two edges being opposite and spaced apart along the first direction; A plurality of mounting grooves are provided at each edge, and limiting protrusions extending toward each other are respectively provided on two side walls of each mounting groove; a first pulley is provided in each mounting groove and is limited by the limiting protrusions.
8. The sunshade device according to claim 1, characterized in that: The tension spring assembly is constructed as a second tension spring extending in a zigzag manner.
9. The sunshade device according to claim 8, characterized in that: The pull rod further includes a plurality of second pulleys, wherein the plurality of second pulleys are spaced apart from each other along the first direction and / or the second direction; The second tension spring extends around a plurality of second pulleys to extend in a zigzag manner, and each of the second pulleys is adapted to rotate as the second spring contracts.
10. The sunshade device according to claim 9, characterized in that: Each of the second pulleys is configured with a second wheel groove extending in a circumferential direction, and a pattern is provided on a surface of the second wheel groove; at least a portion of the second tension spring is located in the second wheel groove.
11. The sunshade device according to claim 1, characterized in that: The sunshade device further comprises: a reel carrying the curtain fabric; Two rope wheels are respectively installed at the two ends of the reel; the second ends of the two pull ropes are respectively connected to the two rope wheels; and a driving member connected to one end of the reel; In which, the driving member drives the reel to rotate, and the two pulleys rotate synchronously with the reel, so that the curtain is gathered onto the reel, and the two pull ropes are released from the two pulleys respectively, or the curtain is released from the reel and unfolded, and the two pull ropes are gathered onto the two pulleys respectively.