Coupling mechanism for driving a cover of a curtain truss of an electric sunshade for motorized vehicles

Abstract

A coupling mechanism comprises a coupling unit (61) and an elastic connector (62). The coupling unit (61) is pivotable and includes an arm (611) and a push element (612) adjacent to the arm (611). The elastic connector (62) is connected between the arm (611) and a cover (22) of a curtain reservoir (21) such that the push element (612) can be pushed by a sliding block (43) to lower and restore a position of the push element (612). The elastic connector (62) is configured to pull the cover (22) to close the opening of the curtain reservoir (21) when the arm (611) swings downwards. The cover (22) rotates upwards to open due to an elastic torsional force when the sliding block (43) moves upwards to detach from the pressing part (612).

Description

1. Field of the invention

[0001] The present invention relates to an electric sunshade for motorized vehicles, and in particular to a coupling mechanism of an electric sunshade for motorized vehicles which can synchronize movements of a curtain and a cover of a curtain container of the electric sunshade. 2. Description of the state of the art

[0002] An electric curtain device currently used in the windows of motorized vehicles mainly comprises a curtain fabric, a retraction assembly, and a drive mechanism. The drive mechanism propels a strip of the curtain fabric upwards along curtain tracks that extend and are attached to both sides of a window of a motorized vehicle.

[0003] When the curtain fabric is in a static position, it is retracted into a curtain hopper beneath the window pane. The top of the hopper is equipped with a cover that incorporates a torsion spring. This cover is connected to two coupling mechanisms that allow it to automatically open and close an opening on the top of the hopper in sync with the unfolding and retraction of the curtain fabric.

[0004] The coupling mechanisms mentioned above can be driven by the drive mechanism. A connecting block for each coupling mechanism is located on the lower section of a corresponding curtain track and is connected to the cover via a spring. When the curtain fabric and the strip are driven and drawn into the curtain hopper, the strip presses against the connecting block, and the cover closes the hopper opening to prevent foreign objects from falling into the hopper.

[0005] The conventional coupling mechanisms described above are connected to the cover, driven by the drive mechanism, and work in conjunction with the torsion spring to open and close the cover in sync with the extension and retraction of the curtain fabric. However, the two sides of a motorized vehicle window are curved and extend upwards towards each other. The curtain fabric is shaped with a top side that is narrower than its bottom side to conform to the window's shape. The lateral ends of the curtain housing are each set away from the curtain tracks. The spring, connected between the cover and a corresponding connecting block located on the lower section of the curtain track, exerts considerable preload. Therefore, the elastic force provided by the spring can hardly be transmitted directly to the cover.Consequently, it is difficult for the connecting block to move smoothly within a suitable curtain track. Conventional coupling mechanisms cannot easily drive the cover to open and close.

[0006] To overcome the shortcomings of the conventional coupling mechanism, the present invention provides a coupling mechanism that reduces or eliminates the aforementioned problems.

[0007] The main objective of the present invention is to provide a coupling mechanism for an electric sunshade for motorized vehicles that can smoothly drive the cover of a curtain container to open and close.

[0008] The coupling mechanism refers to an electric sunshade for motorized vehicles. The coupling mechanism is assembled on a curtain track adjacent to a curtain housing and connected to a cover of the housing. The coupling mechanism opens and closes the cover by being driven by one end of a strip that moves along the curtain track. The coupling mechanism comprises a coupling unit and an elastic connector. The pivoting coupling unit is positioned between one end of the curtain housing and the curtain track beneath the cover and includes an arm and a push element located on one side of the arm. The push element is located on a lower section of the curtain track. The elastic connector is connected between the arm and the cover.The push-button mechanism can be pressed by a sliding block at one end of the strip to lower and restore the push-button mechanism's position. The elastic connector is configured to pull the cover to close an opening in the curtain reservoir as the arm swings downwards. Simultaneously, the cover rotates upwards due to an elastic torsional force to open as the sliding block moves upwards to disengage from the push-button mechanism.

[0009] In the aforementioned coupling mechanism, the arm is an elongated rod positioned laterally between the lower section of the curtain track and the curtain housing, and has two ends. One end of the arm is connected to the push-fit component, and the other end has a pivoting section, pivotally connected to a lower section of the curtain housing wall, allowing for lateral movement. The elastic connector is attached between the arm and the cover.

[0010] In the coupling mechanism described above, each of the two sides of the lower section of the curtain housing has a lateral guide groove. The pivoting section is pivotally connected to the lateral guide groove.

[0011] In the coupling mechanism described above, the lateral guide groove is located on the wall of the curtain housing and has an insertion opening at one end of the lateral guide groove, away from the curtain track, and having a diameter larger than the width of the lateral guide groove. A locking section is located at one end of the pivot section, has a size larger than the width of the lateral guide groove, and is configured to be inserted into the insertion opening. The pivot section can move along the lateral guide groove, and the locking section is bounded on an inner side of the curtain housing wall.

[0012] In the aforementioned coupling mechanism, the arm has an assembly section adjacent to the push-fit part and projecting upwards. One of the two ends of the elastic connector is connected to the assembly section, and the other end of the elastic connector is connected to the cover.

[0013] In the coupling mechanism described above, the coupling unit comprises an arm and an auxiliary coupling rod. The arm has two ends and a pivot end, which is located at one of the two ends of the arm and pivotally connected to the lower section of the curtain track. An assembly section is located at the other of the two ends of the arm and is connected to the elastic connector. The auxiliary coupling rod has two ends, one of which is pivotally connected to the push-fit part, and the other of which is pivotally connected to the arm and adjacent to the assembly section.

[0014] In the coupling mechanism mentioned above, the pusher part has an elongated opening through which one of the two cords runs, each of which is connected to the two sliding blocks.

[0015] In the coupling mechanism mentioned above, the push-fit part has a notch formed on one side of the push-fit part, extending from a top to a bottom of the push-fit part, and connected to the elongated opening.

[0016] The coupling mechanism can be used with electric sunshades for motorized vehicles. It is assembled on the curtain track, adjacent to the curtain housing, and connected to the housing cover. The sliding block at the end of the curtain fabric strip moves within the track, driving the coupling mechanism to open and close the cover. The coupling mechanism also utilizes a combination of the coupling unit and the elastic connector. The coupling unit is pivotable, positioned between the end of the curtain housing and the adjacent curtain track, and beneath the cover. The push element on one side of the arm is located in the lower section of the curtain track. The elastic connector is attached between the arm and the cover.Therefore, the arm pivots downwards when the pusher is pressed by the sliding block at the end of the strip to pull the cover closed, closing the curtain container opening via the elastic connector. The cover rotates upwards to open due to an elastic torsional force as the sliding block moves upwards to release itself from the pusher.

[0017] The coupling mechanism also uses the coupling unit to extend its length, effectively reducing the angle between the elastic connector and the connecting arm. The push element is located in the curtain track and can be pressed. The coupling unit is pivotable and positioned between the push element and the elastic connector. The push element works in conjunction with the coupling unit to effectively transfer a driving force to the cover when the drive mechanism propels the two ends of the curtain fabric strip up and down along the two curtain tracks. This reduces interference with the push element's movement within the curtain track. The coupling mechanism ensures that the cover opens and closes smoothly.

[0018] The pusher has an elongated opening through which the cord runs, driving the sliding block. The sliding block, driven by the cord, exerts a direct force on the top of the pusher. Additionally, a notch is formed on the side of the pusher, extending from the top to the bottom. The cord can be inserted from the side of the pusher, through the notch, directly into the elongated hole. This facilitates threading the cord through the pusher.

[0019] Further items, advantages and new features of the invention will become clearer from the following detailed description in conjunction with the accompanying drawings. In the drawings: Fig. Figure 1 is a first front view of an electric sunshade, comprising a first embodiment of coupling mechanisms according to the present invention, assembled on the electric sunshade, showing that a curtain fabric of the sunshade is retracted; Fig. Figure 2 is a first, partially enlarged front view of the electric sunshade in Fig. 1, which shows one of the coupling mechanisms; Fig. Figure 3 is a first, partially enlarged perspective view of the electric sunshade in Fig. 1, which shows one of the coupling mechanisms partially in exploded view; Fig. Figure 4 is a second, partially enlarged perspective view of the electric sunshade in Fig. 1; Fig. Figure 5 is a first side view of the electric sunshade in Fig. 1, which shows that the curtain fabric has been drawn in; Fig. Figure 6 is a second front view of the electric sunshade in Fig. 1, which shows that the curtain fabric is spread out; Fig. Figure 7 is a second, partially enlarged, front view of the electric sunshade in Fig. 1, which shows that the curtain fabric is spread out; Fig. Figure 8 is a second side view of the electric sunshade in Fig. 1, which shows that the curtain fabric is spread out; Fig. Figure 9 is a first front view of an electric sunshade with a second embodiment of the coupling mechanisms assembled thereon according to the present invention, showing that the curtain fabric of the sunshade is retracted; Fig. Figure 10 shows a first, partially enlarged front view of the electric sunshade in Fig. 9, which shows one of the coupling mechanisms; Fig. Figure 11 is a first, partially enlarged perspective view of the electric sunshade in Fig. 9; Fig. Figure 12 is a second, partially enlarged perspective view of the electric sunshade in Fig. 9; Fig. 13 is a first side view of the electric sunshade in Fig. 9, which shows that the curtain fabric has been drawn in; Fig. 14 is a second front view of the electric sunshade in Fig. 9, which shows that the curtain fabric is spread out; Fig. Figure 15 is a second, partially enlarged, front view of the electric sunshade in Fig. 9; and Fig. 16 is a second side view of the electric sunshade in Fig. 9, which shows that the curtain fabric is spread out.

[0020] A first embodiment and a second embodiment of the coupling mechanisms 60, 70 according to the present invention, which are assembled on an electric sunshade for a motorized vehicle, are each shown in Fig. 1 and Fig. Figure 9 shows the electric sunshade being installed in a door of the motorized vehicle to provide sun protection for the door window.

[0021] With reference to Fig. 1, Fig. 5, Fig. 9 and Fig. Figure 13 of the electric sunshade comprises a track assembly 10, a curtain receiving assembly 20, a retraction assembly 30, a curtain fabric 40, and a drive mechanism 50. The track assembly 10 has two curtain rails 11, each mounted on opposite sides of the door window. The curtain receiving assembly 20 is mounted below the door window and includes a curtain reservoir 21 and a cover 22. The curtain reservoir 21 has an opening 211 at its top. The cover 22 is pivotally connected to the top of the curtain reservoir 21 via a shaft to open and close the opening 211. One or more torsion springs are connected between the cover 22 and the top of the curtain reservoir 21 to provide torsional forces that drive the cover 22 upwards, thus exposing the opening 211 of the curtain reservoir 21.In the embodiments, the cover 22 has two connecting plates 221, each located at one of the two ends of the cover 22 and projecting downwards from an underside of the cover 22.

[0022] With reference to Fig. 1 to Fig. 5 and Fig. 9 to Fig. The retraction assembly 30 is mounted in the curtain holder 21. One of the two sides of the curtain fabric 40 is connected to the retraction assembly 30, and the curtain fabric 40 can be automatically retracted by the retraction assembly 30. The other of the two sides of the curtain fabric 40 is a movable side with a strip 41. The strip 41 has a length corresponding to the length of the other side, which is the movable side of the curtain fabric 40. Essentially, the curtain fabric 40 and the window correspond to the shape of the door. Since two sides of the window are curved, one top side of the curtain fabric 40 is narrower than one bottom side when the curtain fabric 40 is spread out. A section of the curtain fabric 40 between the upper ends of the two curtain tracks 11 is correspondingly narrower than a section between the lower ends of the two curtain tracks 11. One length of the strip 41 is less than one length of the curtain holder 21.Therefore, two laterally movable sliding blocks 43 are mounted at each end of the strip 41. The strip 41 moves up and down along the two curtain tracks 11 over the two sliding blocks 43 at the two ends of the strip 41. The curtain fabric 40 can be automatically drawn into the curtain container 21 and spread upwards from the curtain container 21 by the drawing assembly 30. The drawing assembly 30 can be selected from existing conventional products, and detailed structures of the drawing assembly 30 are not shown in the present invention.

[0023] With reference to Fig. 6 and Fig. In embodiments 14 of the present invention, the two ends of the strip 41 are each mounted by two laterally retractable extension rods 42. The two sliding blocks 43 are each connected to the two end ends of the two extension rods 42 and move laterally due to changes in length of the two laterally retractable extension rods 42. The two sliding blocks 43 are moved accordingly up and down in the two curtain tracks 11.

[0024] With reference to the Fig. 1 to Fig. 5 and Fig. 9 to Fig. In the embodiment 13, the drive mechanism 50 is mounted in the door of the motorized vehicle to move the two sliding blocks 43 at the two ends of the strip 41 up and down. In the embodiments, a drive mechanism with cords can be selected as the drive mechanism 50. The drive mechanism 50 has a pull device 51 and two cords 52. The pull device 51 is an existing conventional product, so specific structures of the pull device 51 are not shown in the present invention. The two cords 52 each surround the two curtain rails 11 and are each connected to the two sliding blocks 43. The two cords 52 are connected to the pull device 51 and are fully tensioned.The pulling device 51 is configured to pull the two cords 52 forwards and backwards to drive the two sliding blocks 43 at each of the two ends of the strip 41 along the two curtain rails 11, so that they move up and down simultaneously and the curtain fabric 40 is spread out and folded together.

[0025] With reference to Fig. 1 to Fig. 5 and Fig. 9 to Fig. 13 The coupling mechanism 60 / 70 is mounted in the door of the motorized vehicle and connected between the cover 22 of the curtain housing 21 and the drive mechanism 50. When the curtain fabric 40 is extended and folded by the drive mechanism 50, the cover 22 opens and closes automatically via the coupling mechanism 60 / 70. Specific structures of the coupling mechanism 60 / 70 are shown below.

[0026] With reference to Fig. 1 and Fig. 9 there are two coupling mechanisms 60 / 70. The two coupling mechanisms 60 / 70 are each assembled between the two ends of the curtain container 21 and the two lower sections of the two curtain rails 11.

[0027] With reference to Fig. 1 to Fig. 5 and Fig. 9 to Fig. Each coupling mechanism 60 / 70 comprises a coupling unit 61 / 71 and an elastic connector 62 / 72. The coupling unit 61 / 71 is pivotable, arranged between the curtain container 21 and one of the two curtain rails 11, and located under the cover 22. The coupling unit 61 / 71 has an arm 611 / 711 and a push element 612 / 713. The push element 612 / 713 is located on one side of the arm 611 / 711. The elastic connector 62 / 72 is connected between the arm 611 / 711 and the cover 22. Preferably, the elastic connector 62 / 72 can be an elastic component such as a tension spring, an elastic band, etc.

[0028] The push element 612 / 713 of the coupling unit 61 / 71 is inserted within a lower section of one of the two curtain rails 11. The push element 612 / 713 can be pressed by the sliding block 43 at one of the two ends of the strip 41 to lower its position, and the push element 612 / 713 can then return to its original position. The arm 611 / 711 swings downwards and pulls the cover 22 over the elastic connector 62 / 72 to close the opening 211 of the curtain reservoir 21, and the torsional springs between the curtain reservoir 21 and the cover 22 store torsional elasticity energy. When the sliding block 43 moves upwards and disengages from the push part 612 / 713, the torsion springs between the curtain reservoir 21 and the cover 22 provide elastic torsions to drive the cover 22 to rotate upwards to open.The coupling unit 61 / 71 with the sliding block 43 is driven by the elastic connector 62 / 72 to restore itself simultaneously.

[0029] Preferably, the printing unit 612 / 713 has, with reference to Fig. Figure 7 has an elongated opening 6121. One of the two cords 52, driving the sliding block 43, runs through the elongated opening 6121. The sliding block 43, driven by the cord 52, can press directly onto the pressure part 612 / 713, so that a force from the sliding block 43 pressing on the pressure part 612 / 713 is exerted directly on a top surface of the pressure part 612 / 713. In addition, the pressure part 612 / 713 also has a notch 6122 formed on one side of the pressure part 612 / 713, extending from the top surface of the pressure part 612 / 713 to a bottom surface of the pressure part 612 / 713. The cord 52 can be inserted from the side of the pressing part 612 / 713, via the notch 6122, directly into the elongated opening 6121 of the pressing part 612 / 713. This facilitates the passage of the cord 52 through the pressing part 612 / 713.

[0030] In the first embodiment, which is described in Fig. 1 to Fig. As shown in Figure 5, the coupling unit 61 is designed as an elongated rod structure and is suitable for situations requiring a larger installation space within the door of the motorized vehicle. The coupling unit 61 includes the arm 611, which is an elongated rod. The arm 611 is positioned laterally between the lower section of the curtain track 11 and the curtain housing 21. The arm 611 has two opposing ends. The push element 612 is located at one of the two ends of the arm 611, and the other end of the arm 611 has a pivot section 6111. The push element 612 extends into the lower section of the curtain track 11. The pivot section 6111 is laterally movable and pivotally connected to a lower section of a wall 212 of the curtain housing 21. The elastic connector 62 is located between the arm 611 and the cover 22.Preferably, the arm 611 has an assembly section that adjoins the pressing part 612 and projects upwards. One of the two ends of the elastic connector 62 is connected to the assembly section, and the other of the two ends of the elastic connector 62 is connected to the connecting plate 221 on the underside of the cover 22.

[0031] Two lateral guide grooves 213 are arranged on opposite sides of the lower section of the wall 212 of the curtain housing 21. The pivot section 6111 is inserted into one of the two lateral guide grooves 213. In the first embodiment, the lateral guide groove 213 on the wall 212 of the curtain housing 21 has an insertion opening 214, which is located at one end of the lateral guide groove 213 away from the curtain track 11. The insertion opening 214 has a diameter larger than the width of the lateral guide groove 213. A locking section 6112 is arranged at one end of the pivot section 6111 and has a size larger than the width of the lateral guide groove 213. The locking section 6112 at the end of the pivot section 6111 can be inserted through the insertion opening 214. The blocking section 6112 is blocked by the inside of the wall 212.The pivot section 6111 can move accordingly along the lateral guide groove 213 and is prevented from detaching from the lateral guide groove 213.

[0032] In the second embodiment, which is described in the Fig. As shown in Figures 9 to 13, the coupling unit 71 is selected as a short rod structure and is suitable for a small installation space within the door of the motorized vehicle. The coupling unit 71 comprises the arm 711 and an auxiliary coupling rod 712. One of the two ends of the arm 711 is a pivot end 7111, and the other of the two ends of the arm 711 is an assembly section 7112. The pivot end 7111 is pivotally connected to the lower section of the curtain track 11. Preferably, the pivot end 7111 is arranged below the push-fit part 713. One of the two ends of the elastic connector 72 is connected to the assembly section 7112, and the other of the two ends of the elastic connector 72 is connected to the connecting plate 221 on the underside of the cover 22. One of the two ends of the auxiliary coupling rod 712 is pivotably connected to the push part 713.The auxiliary coupling rod 712 tilts downwards, and the other of the two ends of the auxiliary coupling rod 712 is pivotably connected to the arm 711 and borders the assembly section 7112.

[0033] The operating principles of the 60 / 70 coupling mechanism, applied to the electric sunshade of the motorized vehicle, are described in Fig. 1 to Fig. 5 and Fig. 9 to Fig. Figure 13 shows that when the curtain fabric 40 is folded, the pulling device 51 pulls the two cords 52 backward to exert downward forces on the two sliding blocks 43 at the two ends of the strip 41 of the curtain fabric 40. The pulling device 51 works in conjunction with the automatic retraction force on the curtain fabric 40 from the retraction assembly 30 to retract the curtain fabric 40 into the curtain reservoir 21. The pulling device 51 stops pulling when the strip 41 enters the curtain reservoir 21. Meanwhile, the two sliding blocks 43 at the two ends of the strip 41, on which the downward forces act, each exert downward forces on the two push elements 612 / 713 of the two coupling units 61 / 71 on the two lower sections of the two curtain tracks 11.Each coupling unit 61 / 71 simultaneously drives the elastic connector 62 / 72 and pulls the cover 22 to close the opening 211 of the curtain container 21 via the elastic connector 62 / 72. The torsion springs store torsional elasticity energy accordingly.

[0034] As in the first embodiment mentioned above, with reference to Fig. 1 to Fig. As described in Figure 5, when the coupling unit 61 is configured as the elongated rod structure, the sliding block 43, driven by the cord 52, presses against the pressure element 612 inserted into the lower section of the curtain track 11. One of the two ends of the arm 611 moves downwards with the pressure element 612, while the other end of the arm 611 slides along the lateral guide groove 213 on the lower section of the wall 212 of the curtain housing 21. The arm 611 exerts a downward force on the cover 22 via the elastic connector 62 to overcome the torsional forces acting on the cover 22. The cover 22 is pulled downwards to close the opening 211 of the curtain housing 21.

[0035] With reference to Fig. 9 to Fig. When the coupling unit 71 is configured as the short rod structure, the sliding block 43, driven by the cord 52, presses against the pressure element 713 inserted into the lower section of the curtain track 11. The auxiliary coupling rod 712, pivotally connected to the pressure element 713, exerts a downward force on one of the two ends of the arm 711 with the assembly section 7112. The pivotable end 7111 of the arm 711, which is pivotally connected to the curtain track 11, is a pivot point for the arm 711 to rotate downwards. The arm 711 exerts a downward force on the cover 22 via the elastic connector 72 to overcome the torsional forces exerted on the cover 22. The cover 22 is pulled downwards to close the opening 211 of the curtain container 21 accordingly.

[0036] With reference to Fig. 6 to Fig. 8 and Fig. 14 to Fig.16. The curtain fabric 40 is spread out to screen the window of the motorized vehicle. The pulling device 51 of the drive mechanism 50 pulls the two cords 52 forward to drive the two sliding blocks 43 at the two ends of the strip 41 of the curtain fabric 40, causing them to move upward along the two curtain tracks 11. As each sliding block 43 moves upward, the downward force exerted on the pressure element 612 / 713 disappears. The cover 22, which closes the top of the curtain reservoir 21, rotates upward due to the torsional forces of the torsion springs. The cover 22 initially opens the opening 211 of the curtain reservoir 21 and maintains the open position. The push element 612 / 713 of the coupling unit 61 / 71, inserted into the lower section of the curtain rail 11, moves upwards with the upwardly rotating cover 22 and stops at a certain position.Upward forces from the cords 52 of the drive mechanism 50 act on the strip 41 of the curtain fabric 40, which is retracted into the curtain housing 21. The curtain fabric 40 overcomes the retraction force exerted by the retraction assembly 30 and moves upward through the opening 211 of the curtain housing 21. Until the curtain fabric 40 is fully extended, the drive mechanism 50 is switched off, and the curtain fabric 40 blocks sunlight on one side of the window of the motorized vehicle.

Claims

[1] Coupling mechanism for driving a cover (22) of a curtain reservoir (21) of an electric sunshade for a motor vehicle, wherein the coupling mechanism is configured to be assembled on an electric sunshade on a window of a motor vehicle, arranged between a lower section of a curtain track (11) next to the window and a curtain reservoir (21) below the window; wherein the coupling mechanism is connected to a cover (22) on a top of the curtain reservoir (21), driven by an elastic torsional force;wherein a strip (41) of a curtain fabric (40) of the electric sunshade is configured to be driven by a drive mechanism (50) to move up and down, wherein two cords (52) of the drive mechanism (50) are each connected to two sliding blocks (43) at two ends of the strip (41), one of the sliding blocks (43) moving along the curtain track (11), driving the curtain fabric (40) to spread and fold; wherein the coupling mechanism drives the cover (22) to close and open an opening at the top of the curtain container (21), and wherein the coupling mechanism comprises; a pivotable coupling unit (61 / 71) arranged between one end of the curtain container (21) and the curtain track (11), located under the cover (22) and comprising one arm (611 / 711); and a push-button part (612 / 713) arranged on one side of the arm (611 / 711) and on the lower section of the curtain track (11); and an elastic connector (62 / 72) which is connected between the arm (611 / 711) and the cover (22) in such a way that the pusher part (612 / 713) can be pressed by the sliding block (43) at one of the two ends of the strip (41) to lower and restore a position of the pusher part (612 / 713); wherein the elastic connector (62 / 72) is configured to pull the cover (22) to close the opening of the curtain container (21) when the arm (611 / 711) swings downwards; wherein the cover (22) rotates upwards by the elastic torsional force to open when the sliding block (43) moves upwards to detach from the pressing part (612 / 713). [2] Coupling mechanism according to claim 1, wherein the arm (611 / 711) is an elongated rod, arranged laterally between the lower section of the curtain track (11) and the curtain container (21), and has two ends; one of the two ends of the arm (611 / 711) is connected to the push part (612 / 713), and the other of the two ends of the arm (611 / 711) has a pivot section (6111), pivotably connected to a lower section of a wall of the curtain container (21), and is laterally movable; and the elastic connector (62 / 72) is connected between the arm (611 / 711) and the cover (22). [3] Coupling mechanism according to claim 2, wherein each of the two sides of the lower section of the curtain container (21) has a lateral guide groove (213); and the pivot section (6111) is pivotably connected to the lateral guide groove (213). [4] Coupling mechanism according to claim 3, wherein the lateral guide groove (213) on the wall of the curtain container (21) has an insertion opening (214) which is arranged at one end of the lateral guide groove (213), the end being away from the curtain track (11) and having a diameter that is larger than a width of the lateral guide groove (213); a blocking section (6112) is arranged at a termination end of the pivoting part (6111), has a size that is larger than the width of the lateral guide groove (213), and is configured so that it can be inserted into the insertion opening (214); and the pivot section (6111) is movable along the lateral guide groove (213), and the blocking section (6112) is limited on an inside side of the wall of the curtain container (21). [5] Coupling mechanism according to claim 4, wherein the arm (611 / 711) has an assembly section (7112) adjacent to the push-fit part (612 / 713) and projecting upwards; and one of the two ends of the elastic connector (62 / 72) is connected to the assembly section (7112), and the other of the two ends of the elastic connector (62 / 72) is connected to the cover (22). [6] Coupling mechanism according to claim 1, wherein the coupling unit (71) an arm (711) with two ends, one of which is a pivot end (7111), and the pivot end (7111) is pivotably connected to the lower section of the curtain track (11); and an assembly section (7112) which is arranged at the other of the two ends of the arm (711) and is connected to the elastic connector (72); and an auxiliary coupling rod (712) with two ends, wherein one of the two ends of the auxiliary coupling rod (712) is pivotably connected to the push part (713), the other of the two ends of the auxiliary coupling rod (712) is pivotably connected to the arm (711), and adjoins the assembly section (7112). [7] Coupling mechanism according to one of claims 1 to 6, wherein the push part (713) has an elongated opening (6121) through which one of the two cords (52) runs, each of which is connected to the two sliding blocks (43). [8] Coupling mechanism according to claim 7, wherein the push-in part (612 / 713) has a notch (6122) formed on one side of the push-in part (612 / 713), extending from a top to a bottom of the push-in part (612 / 713), and connected to the elongated opening (6121).

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