Curtain folding and unfolding mechanism

Abstract

The utility model provides a curtain folding and unfolding mechanism. The curtain folding and unfolding mechanism comprises a curtain frame, a curtain body, a curtain sliding block fixed on the curtain body, a folding and unfolding driving source and a folding and unfolding transmission unit, the folding and unfolding transmission unit comprises a traction assembly, a first traction rope and a second traction rope, the first traction rope and the second traction rope are connected between curtain sliding blocks on the two sides of the curtain body, the first traction rope is provided with a first anchoring point, the second traction rope is provided with a second anchoring point, and the folding and unfolding driving source is connected with the first anchoring point and the second anchoring point through the traction assembly. And one part of the first traction rope and / or the second traction rope is bent and accommodated in a curtain movable guide rail on the outer side of the curtain body. When the curtain movable guide rails rotate to switch the forms, the traction structure formed by the first traction rope and the second traction rope can be matched with the curtain movable guide rails in different forms, and the traction structure can be used for driving the curtain sliding block to ascend and descend and can be assembled in the curtain movable guide rails in the switching forms.

Description

Technical Field

[0001] The utility model relates to the technical field of curtain folding and unfolding, in particular to a curtain folding and unfolding mechanism. Background Art

[0002] In order to meet the needs of the automotive market for more and more advanced passenger experience, some models of vehicles are equipped with a mobile screen system exclusively for rear passengers. However, the research and development cost of the mobile screen system is high, and the development difficulty of the screen moving mechanism of the mobile screen system is also high. Based on this, a projection screen system exclusively for rear passengers is launched on the market as a substitute for the mobile screen system.

[0003] Usually, the mobile screen system includes a screen rolling mechanism and a projector, such as a projection device for the interior of a vehicle disclosed in the Chinese utility model patent with application number 202320608041.3, which sets the projection screen between the left and right B-pillars of the vehicle and sets the projector under the roof of the vehicle; and the projection screen is wound on a rolling curtain shaft tube, and the two ends of the rolling curtain shaft tube are rotatably set on a U-shaped frame, and the two ends of the U-shaped frame include vertically set curtain guide rails, which are connected to the B-pillar of the vehicle body through a connecting plate, and the free end of the projection screen is provided with a sliding foot that is slidably connected to the curtain guide rail, and the U-shaped frame is provided with a driving mechanism for driving the sliding foot to slide back and forth along the curtain guide rail; the driving mechanism includes a motor, a gear driven by the motor, and two flexible shafts meshing with the gear. The sliding foot is driven by the driving mechanism to move along the curtain guide rail to realize the storage and unfolding of the projection screen.

[0004] The above-mentioned delivery device inside the vehicle occupies a large space in the vehicle interior environment, which is extremely abrupt and very unsightly. Based on this, the curtain guide can be set as a rotatable movable guide structure: when the mobile screen system is not in use, the curtain guide is in a storage state tilted outward to reduce the occupied space in this state; when the mobile screen system is in use, the curtain guide rotates inward to a vertical state. However, when the curtain guide rotates to switch the form, the length of the flexible shaft will change, and the flexible shaft is meshed with the gear, so that the above-mentioned drive mechanism cannot be used for the curtain guide with switchable form. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a curtain retracting and extending mechanism which is better suitable for a curtain movable guide rail with switchable forms.

[0006] To achieve the above-mentioned purpose, the utility model provides a curtain folding and unfolding mechanism, comprising a fixed curtain frame, a curtain body foldably mounted on the curtain frame, curtain sliders fixed on both sides of the curtain body along the width direction of the curtain body, a folding and unfolding driving source, and a folding and unfolding transmission unit, wherein the folding and unfolding driving source is connected to the curtain sliders through the folding and unfolding transmission unit; the folding and unfolding transmission unit comprises a traction assembly, and a first traction rope and a second traction rope both connected between the curtain sliders on both sides of the curtain body, a first anchoring point is provided on the first traction rope, and a second anchoring point is provided on the second traction rope, the folding and unfolding driving source is respectively connected to the first anchoring point and the second anchoring point through the traction assembly, and a part of the first traction rope and / or the second traction rope is used to be bent and accommodated in a curtain movable guide rail outside the curtain body;

[0007] When the retraction and extension driving source is activated, the movement directions of the first anchor point and the second anchor point are opposite.

[0008] Further, the traction assembly includes a retracting component that can rotate around a fixed axis, and a third traction rope and a fourth traction rope that are both wound around the retracting component, the retracting and unfolding driving source is transmission-connected to the retracting component, an end of the third traction rope is fixed to the first traction rope via a first anchor point, and an end of the fourth traction rope is fixed to the second traction rope via a second anchor point;

[0009] When the retracting and extending driving source drives the retracting component to rotate, the third traction rope and the fourth traction rope are respectively in a retracted state and a released state.

[0010] Furthermore, the retracting and extending transmission unit further comprises a first fixed pulley, and a fifth traction rope wound around the first fixed pulley, and two ends of the fifth traction rope are respectively fixed to the first anchor point and the second anchor point;

[0011] Along the width direction of the curtain body, the first anchor point and the second anchor point are movably distributed between the retraction and extension driving source and the first fixed pulley.

[0012] Further, the traction assembly includes a retracting component that can rotate around a fixed axis, a fixed support pulley that can rotate around the fixed axis, and a sixth traction rope that passes over the fixed support pulley, the retracting and unfolding driving source is transmission-connected to the retracting component, both ends of the sixth traction rope are wound around the retracting component, the section of the sixth traction rope distributed on one side of the fixed support pulley is fixed to the first traction rope through a first anchor point, and the section of the sixth traction rope distributed on the other side of the fixed support pulley is fixed to the second traction rope through a second anchor point;

[0013] When the retracting and extending driving source drives the retracting component to rotate, the two ends of the sixth traction rope on the retracting component are respectively in a retracted state and a released state.

[0014] Furthermore, the retractable and extendable driving source is a fixedly installed motor, the retractable component is a cylinder and is fixed on the output shaft of the retractable and extendable driving source, and a wire groove is provided on the outer periphery of the retractable component.

[0015] Furthermore, the retraction and extension transmission unit also includes a second fixed pulley and a third fixed pulley symmetrically installed in the top interior space, and a fourth fixed pulley and a fifth fixed pulley symmetrically installed in the movable guide rail of the curtain. The first traction rope distributed on one side of the first anchor point is supported by the second fixed pulley, and the first traction rope distributed on the other side of the first anchor point is supported by the third fixed pulley and the fifth fixed pulley. The second traction rope distributed on one side of the second anchor point is supported by the second fixed pulley and the fourth fixed pulley, and the second traction rope distributed on the other side of the second anchor point is supported by the third fixed pulley.

[0016] Furthermore, the retraction and extension transmission unit also includes a traction rope pre-tensioning spring extending up and down, and there are two traction rope pre-tensioning springs, which are respectively installed on the fourth fixed pulley and the fifth fixed pulley, and the two traction rope pre-tensioning springs act on the first traction rope and the second traction rope respectively.

[0017] Furthermore, the retraction and extension transmission unit also includes a traction rope pre-tensioning spring extending along the width direction of the curtain body, and there are two traction rope pre-tensioning springs, which are respectively fixed on each curtain slider; the first traction rope and the second traction rope are both: one end of the rope is fixed to a curtain slider, and the other end of the rope is fixed to the traction rope pre-tensioning spring on the other curtain slider.

[0018] Furthermore, the retraction and extension transmission unit also includes a traction rope pre-tensioning spring extending up and down, and there are two traction rope pre-tensioning springs, which are respectively installed in the vertical rope sections of the first traction rope and the second traction rope close to the curtain slider.

[0019] Furthermore, the curtain retracting and extending mechanism also includes a curtain reel rotatably mounted on the curtain frame, and a curtain bottom strip fixed at the lower edge of the curtain body, the curtain reel extends straight along the width direction of the curtain body, the upper edge of the curtain body is fixed to the curtain reel, the curtain bottom strip covers the lower edge of the curtain body along the width direction of the curtain body, and there are two curtain sliders, which are symmetrically fixed at both ends of the curtain bottom strip.

[0020] Furthermore, the curtain reel is a hollow shaft, and a rewinding spring is installed inside the curtain reel.

[0021] Furthermore, spring plates are fixed at both edges of the curtain body in the width direction, and the spring plates are used to be accommodated and clamped in the curtain movable guide rails. The width of the curtain body is smaller than the spacing between a pair of curtain movable guide rails.

[0022] As described above, the curtain retracting and extending mechanism of the utility model has the following beneficial effects:

[0023] The retracting and extending driving source of the present application drives the curtain slider to move up or down through the retracting and extending transmission unit, and accordingly drives the curtain body to be retracted into the curtain frame, or drives the curtain body to be extended from the curtain frame to be unfolded. In particular, the present application uses the first traction rope and the second traction rope to pull the curtain slider to achieve the lifting and lowering of the curtain slider. When the curtain movable guide rail rotates to switch its form, the traction structure composed of the first traction rope and the second traction rope can be adapted to different forms of curtain movable guide rails, so that the present application can be used to drive the lifting and lowering of the curtain slider, and can also be assembled in the curtain movable guide rail of the switching form. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a diagram of the storage status of the vehicle projection screen system of this application.

[0025] Figure 2 This is a diagram of the unfolded state of the vehicle projection screen system of this application.

[0026] Figure 3 for Figure 1 Cross-sectional view at the curtain retraction and extension mechanism.

[0027] Figure 4 for Figure 3 Schematic diagram of the structure of the vehicle projection screen system.

[0028] Figure 5 for Figure 7 main view.

[0029] Figure 6 for Figure 2 Cross-sectional view at the curtain retraction and extension mechanism.

[0030] Figure 7 for Figure 6 Schematic diagram of the structure of the vehicle projection screen system.

[0031] Figure 8 for Figure 7 main view.

[0032] Fig. 9 This is a front view of the first embodiment of the curtain folding and unfolding mechanism in the present application, in which the curtain body is in a folded state.

[0033] Fig.10 for Fig. 9 Action diagram of the curtain slider being driven downward by the middle retraction and extension drive source.

[0034] Fig.11 for Fig. 9 Schematic diagram of the fully unfolded center curtain body.

[0035] Fig.12 for Fig. 9 Schematic diagram of the assembly of the middle reeling component, the third traction rope and the fourth traction rope.

[0036] Fig.13 for Fig.12 Schematic diagram of the structure after omitting the retracting components.

[0037] Fig.14 for Fig. 9 Vertical cross-section of .

[0038] Fig.15 for Fig. 9 Horizontal cross section.

[0039] Fig.16 This is a front view of the second embodiment of the curtain folding and unfolding mechanism in the present application, in which the curtain body is in a folded state.

[0040] Fig.17 for Fig.16 Schematic diagram of the fully unfolded center curtain body.

[0041] Fig.18 This is a front view of the third embodiment of the curtain folding and unfolding mechanism in the present application, in which the curtain body is in a folded state.

[0042] Fig.19 for Fig.18 Schematic diagram of the fully unfolded center curtain body.

[0043] Fig. 20 This is a front view of the fourth embodiment of the curtain retracting and unfolding mechanism in the present application, in which the curtain body is in a fully unfolded state.

[0044] Fig.21 This is a front view of the fifth embodiment of the curtain retracting and unfolding mechanism in the present application, in which the curtain body is in a fully unfolded state.

[0045] Component number description

[0046] 10 Curtain frame

[0047] 20 Screen body

[0048] 30 Curtain Sliders

[0049] 40 Development drivers

[0050] 50 Retracting parts

[0051] 61 Third traction rope

[0052] 62 Fourth traction rope

[0053] 63 First Tow Rope

[0054] 64 Second traction rope

[0055] 65 First anchor point

[0056] 66 Second anchor point

[0057] 67 First fixed pulley

[0058] 68 Fifth traction rope

[0059] 69 Second fixed pulley

[0060] 610 Third fixed pulley

[0061] 611 Fourth fixed pulley

[0062] 612 Fifth fixed pulley

[0063] 613 Fixed support pulley

[0064] 614 Sixth Tow Rope

[0065] 70 Traction rope preload spring

[0066] 80 Curtain Scroll

[0067] 90 Curtain bottom strip

[0068] 110 Rewind spring

[0069] 120 Shrapnel

[0070] 130 Curtain fixing rail

[0071] 141 Roof

[0072] 142 Body Interior

[0073] 143 Body B-pillar

[0074] 144 Top interior space

[0075] 145 Side interior space

[0076] 151 Curtain movable rail

[0077] 152 Rotation axis

[0078] 153 Form switching drive source

[0079] 160 Projector DETAILED DESCRIPTION

[0080] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0081] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0082] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0083] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0084] The utility model provides a curtain folding and unfolding mechanism, comprising a fixed curtain frame 10, a curtain body 20 foldably mounted on the curtain frame 10, curtain sliders 30 fixed on both sides of the curtain body 20 along the width direction of the curtain body 20, curtain fixing guide rails 130 distributed on the outer side of the curtain body 20 along the width direction of the curtain body 20, a folding and unfolding driving source 40, and a folding and unfolding transmission unit; the folding and unfolding driving source 40 is connected to the curtain slider 30 through the folding and unfolding transmission unit, drives the curtain slider 30 to move up or down, and correspondingly drives the curtain body 20 to be folded into the curtain frame 10, or drives the curtain body 20 to extend from the curtain frame 10 to unfold, so as to realize the folding and unfolding drive of the curtain body 20; the curtain frame 10 is fixed to the vehicle roof 141, the curtain fixing guide rails 130 are fixed to the curtain frame 10, and are provided with a first slide groove extending up and down. The screen retracting and extending mechanism can be used in the fields of automobiles, offices, etc., and the following description will be given by taking the screen retracting and extending mechanism used in the automobile field as an example. Based on this, the utility model also provides a vehicle projection screen system, which includes a screen retracting and extending mechanism.

[0085] For ease of description, in the following embodiments, the width direction of the vehicle is defined as the left-right direction, the length direction of the vehicle is defined as the front-back direction, and the height direction of the vehicle is defined as the up-down direction. The curtain body 20 is rectangular, and the width direction of the curtain body 20 is consistent with the width direction of the vehicle.

[0086] like Figures 1 to 3 ,as well as Figure 6 As shown, the vehicle projection screen system is installed in the interior space of the vehicle, and the interior space includes a top interior space 144 formed between the roof 141 and the vehicle body interior 142, and a side interior space 145 formed between the vehicle body B-pillar 143 and the vehicle body interior 142. Figure 3 and Figure 6 As shown, the vehicle body B-pillar 143 is tilted and extended outward and downward, so that the left and right B-pillars of the vehicle are in an eight-shaped shape, or in a trapezoidal shape. The vehicle projection screen system includes a projector 160, a screen folding and unfolding mechanism, and a bending guide rail mechanism. The projector 160 is stored in the top interior space 144 above the rear seat. The screen folding and unfolding mechanism is arranged between the left and right body B-pillars 143 in the vehicle and installed in the top interior space 144. There are two bending guide rail mechanisms, which are respectively installed in the side interior spaces 145 on the left and right sides of the screen body 20, that is, the bending guide rail mechanism is arranged on the inner side of the body B-pillar 143 and is arranged close to the body B-pillar 143.

[0087] like Figures 3 to 8As shown, the bending guide rail mechanism includes a rotating shaft 152 that is fixed and extends forward and backward, a curtain movable guide rail 151 whose upper end is rotatably mounted on the rotating shaft 152, a form switching driving source 153, and a switching transmission unit. The rotating shaft 152 is fixed to the roof 141 or the curtain frame 10, and a second slide groove is provided in the curtain movable guide rail 151. The form switching driving source 153 is connected to the curtain movable guide rail 151 through the switching transmission unit, and drives the curtain movable guide rail 151 to rotate outward around the rotating shaft 152 toward the direction of the vehicle body B-pillar 143, or to rotate inward toward the direction away from the vehicle body B-pillar 143. In this way, the form switching driving source 153 drives the curtain movable guide rail 151 to be stored in the side interior space 145, or to extend inward from the side interior space 145.

[0088] Furthermore, the vehicle body interior 142 has a first opening at the screen retracting and unfolding mechanism, the first opening is connected to the top interior space 144, and the first opening allows the screen body 20 to pass through. The vehicle body interior 142 has a second opening at the bending guide rail mechanism, the second opening is connected to the side interior space 145, and the second opening allows the screen movable guide rail 151 to pass through. The vehicle body interior 142 has a third opening, and the third opening allows the lens at the front end of the projector 170 to be exposed.

[0089] Furthermore, the curtain folding and unfolding mechanism of the present invention has multiple preferred embodiments. The following provides four preferred embodiments of the curtain folding and unfolding mechanism.

[0090] Embodiment 1 of the curtain retracting and extending mechanism

[0091] like Fig. 9 As shown, the retracting and extending transmission unit of the first embodiment of the curtain retracting and extending mechanism includes a retracting component 50, a third traction rope 61, a fourth traction rope 62, a first traction rope 63 and a second traction rope 64; the retracting component 50, the third traction rope 61 and the fourth traction rope 62 constitute a traction assembly. The retracting component 50 is fixedly installed and can rotate around a fixed axis extending up and down. The retracting and extending driving source 40 is connected to the retracting component 50 to drive the retracting component 50 to rotate. Fig.12 and 13As shown, the third traction rope 61 and the fourth traction rope 62 are both wound around the retracting component 50, and the winding directions of the third traction rope 61 and the fourth traction rope 62 are opposite; thus, when the retracting and unfolding driving source 40 drives the retracting component 50 to rotate, the third traction rope 61 and the fourth traction rope 62 are respectively in the retracting state and the releasing state. The two ends of the first traction rope 63 are respectively connected to the curtain sliders 30 on the left and right sides of the curtain body 20, and the two ends of the second traction rope 64 are also respectively connected to the curtain sliders 30 on the left and right sides of the curtain body 20; and the end of the third traction rope 61 is fixed to the first traction rope 63 through the first anchor point 65 on the first traction rope 63, and the end of the fourth traction rope 62 is fixed to the second traction rope 64 through the second anchor point 66 on the second traction rope 64. The first anchor point 65 and the second anchor point 66 are distributed on the same side of the retracting and unfolding driving source 40 in the left-right direction. In this embodiment, the first anchor point 65 and the second anchor point 66 are both distributed on the left side of the retracting and unfolding driving source 40. A portion of the first traction rope 63 is bent and accommodated in the movable curtain rail 151 on the left side of the curtain body 20 , and a portion of the second traction rope 64 is bent and accommodated in the movable curtain rail 151 on the right side of the curtain body 20 .

[0092] like Figures 3 to 5 As shown, when the form switching driving source 153 drives the movable curtain guide rail 151 to rotate outward through the switching transmission unit so that the movable curtain guide rail 151 is stored in the side interior space 145, the first slide groove and the second slide groove intersect, and the curtain body 20 is stored in the top interior space 144; at this time, due to the first slide groove and the second slide groove, the outer end of the curtain slider 30 is disengaged from the second slide groove, and the retraction and extension driving source 40 cannot drive the curtain slider 30 to move downward along the first slide groove and the second slide groove, so the curtain body 20 always remains stored in the top interior space 144. At the same time, the bending guide rail mechanism is stored as a whole between the vehicle body B-pillar 143 and the vehicle body interior 142, and does not extend out of the vehicle body interior 142 to be exposed in the vehicle interior environment, so that the space occupied by the bending guide rail mechanism at this time is very small, especially it does not additionally occupy the vehicle interior environment inside the vehicle body interior 142; the curtain retracting and extending mechanism is stored as a whole between the vehicle roof 141 and the vehicle body interior 142, and does not extend out of the vehicle body interior 142 to be exposed in the vehicle interior environment; finally, the bending guide rail mechanism and the curtain retracting and extending mechanism do not additionally occupy the vehicle interior environment inside the vehicle body interior 142 when in the stored state, thereby greatly improving the aesthetics of the vehicle interior environment in this state.

[0093] When the form switching driving source 153 drives the curtain movable guide rail 151 to rotate inward to a vertical state through the switching transmission unit, the curtain movable guide rail 151 extends from the side interior space 145, and the second slide groove is in line with the first slide groove, and the two are aligned and connected. At this time, the curtain slider 30 can slide with the first slide groove and the second slide groove. The retraction and extension driving source 40 can drive the curtain slider 30 to move up or down in the first slide groove and the second slide groove through the retraction and extension transmission unit.

[0094] Figures 3 to 5 In the curtain retracting and unfolding mechanism shown in FIG. 1 , the curtain body 20 is in the retracted state, and the curtain slider 30 is at the upper end of its travel range. Fig. 9 As shown, the third traction rope 61 is wound around the retracting component 50 with fewer turns, while the fourth traction rope 62 is wound around the retracting component 50 with more turns. In addition, since the curtain movable guide rail 151 is also in the storage state at this time, part of the first traction rope 63 and part of the second traction rope 64 accommodated in the curtain movable guide rail 151 are both in a state of being deflected outwards. Fig. 9 When the retracting and unfolding driving source 40 drives the retracting component 50 to rotate clockwise, the third traction rope 61 is in the retracted state, and the fourth traction rope 62 is in the released state; the third traction rope 61 drives the first anchor point 65 to move rightward, such as Fig.10 As shown in FIG. 1 , the first traction rope 63 distributed on the left side of the first anchor point 65 pulls the left curtain slider 30 downward, and the left curtain slider 30 pulls the second traction rope 64 thereon downward, and then the right curtain slider 30 is pulled downward by the second traction rope 64. During this process, the second anchor point 66 moves to the left. The curtain sliders 30 on the left and right sides drive the lower edge strip 90 of the curtain to move downward together until the curtain body 20 is fully unfolded, as shown in FIG. Fig.11 As shown, the implementation will Figures 3 to 5 The curtain body 20 in the storage state is switched to Figures 6 to 8 The curtain body 20 is in the unfolded state.

[0095] on the contrary, Figures 6 to 8 In the curtain retracting and unfolding mechanism shown in FIG. 1 , the curtain body 20 is in the unfolded state, and the curtain slider 30 is at the lower end of its travel range. Fig.11 As shown, the third traction rope 61 is wound around the retracting component 50 with more turns, while the fourth traction rope 62 is wound around the retracting component 50 with fewer turns. Fig.11When the retracting and extending driving source 40 drives the retracting component 50 to rotate counterclockwise, the third traction rope 61 is in a released state and the fourth traction rope 62 is in a retracted state; the fourth traction rope 62 drives the second anchor point 66 to move rightward, and the second traction rope 64 distributed on the left side of the second anchor point 66 pulls the left curtain slider 30 upward, and then pulls the right curtain slider 30 upward through the first traction rope 63. During this process, the first anchor point 65 moves leftward. The curtain sliders 30 on the left and right sides drive the lower edge strips 90 of the curtain to move upward together until the curtain body 20 is stored in the top interior space 144, realizing the Figures 6 to 8 The curtain body 20 in the unfolded state is switched to Figures 3 to 5 The curtain body 20 is in the stored state.

[0096] Therefore, the curtain retracting and extending mechanism involved in the present application uses the first traction rope 63 and the second traction rope 64 to pull the curtain slider 30 to achieve the lifting and lowering of the curtain slider 30, while the third traction rope 61 and the fourth traction rope 62 are only wound around the retracting component 50, and there is no situation where the traction ropes are engaged with other components. In this way, when the curtain movable guide rail 151 rotates to switch its form, the traction structure composed of multiple traction ropes can be adapted to the curtain movable guide rail 151 of different forms, so that the present application can be used to drive the lifting and lowering of the curtain slider 30, and can also be assembled in the curtain movable guide rail 151 of the switched form.

[0097] Furthermore, the retracting and extending driving source 40 is fixedly arranged, and the retracting and extending driving source 40 is a motor, and is fixed to the roof 141 or the curtain frame 10, and the output shaft of the retracting and extending driving source 40 is controlled by the ECU to rotate forward or reverse. Fig.12 As shown, the retracting component 50 is preferably a cylinder extending up and down and fixed on the output shaft of the retracting and extending driving source 40. The outer circumference of the cylinder is provided with a wire groove for accommodating the third traction rope 61 and the fourth traction rope 62 for winding.

[0098] Furthermore, if Fig. 9As shown, the curtain retracting and extending mechanism further includes a curtain lower edge strip 90 fixed at the lower edge of the curtain body 20. The curtain lower edge strip 90 is a tubular structure. The curtain lower edge strip 90 covers the lower edge of the curtain body 20 along the width direction of the curtain body 20, and the length of the curtain lower edge strip 90 is not less than the width of the curtain body 20. There are two curtain sliders 30, which are symmetrically fixed at the left and right ends of the curtain lower edge strip 90. The part of the curtain slider 30 close to the curtain lower edge strip 90 is inserted into and fixed in the tube hole of the curtain lower edge strip 90. The curtain slider 30 is fixedly connected to the curtain body 20 through the curtain lower edge strip 90. The curtain retracting and extending mechanism also includes a curtain reel 80 extending left and right along the width direction of the curtain body 20. The curtain reel 80 is rotatably supported in the curtain frame 10, and the curtain reel 80 is stored in the top interior space 144. The upper edge of the curtain body 20 is fixed on the curtain reel 80, and the curtain body 20 can be wound on the curtain reel 80.

[0099] Furthermore, if Fig. 9As shown, the retracting and extending transmission unit further includes a second fixed pulley 69 and a third fixed pulley 610 symmetrically installed in the top interior space 144, and a fourth fixed pulley 611 and a fifth fixed pulley 612 symmetrically installed at the lower end of each curtain movable guide rail 151, the first traction rope 63 distributed on the right side of the first anchor point 65 is supported by the second fixed pulley 69, the first traction rope 63 distributed on the left side of the first anchor point 65 is supported by the third fixed pulley 610 and the fifth fixed pulley 612, the second traction rope 64 distributed on the right side of the second anchor point 66 is supported by the second fixed pulley 69 and the fourth fixed pulley 611, and the second traction rope 64 distributed on the left side of the second anchor point 66 is supported by the third fixed pulley 610. The second fixed pulley 69 and the third fixed pulley 610 are rotatably installed on the roof 141 or the curtain frame 10, and the central axes of the second fixed pulley 69, the third fixed pulley 610, the fourth fixed pulley 611 and the fifth fixed pulley 612 all extend forward and backward. Specifically, the first traction rope 63 distributed on the right side of the first anchor point 65 extends downward after bypassing the second fixed pulley 69 and is connected to the right curtain slider 30; the first traction rope 63 distributed on the left side of the first anchor point 65 extends downward after bypassing the third fixed pulley 610, and then extends upward after bypassing the fifth fixed pulley 612 and is connected to the left curtain slider 30; the second traction rope 64 distributed on the right side of the second anchor point 66 extends downward after bypassing the second fixed pulley 69, and then extends upward after bypassing the fourth fixed pulley 611 and is connected to the right curtain slider 30; the second traction rope 64 distributed on the left side of the second anchor point 66 extends downward after bypassing the third fixed pulley 610 and is connected to the left curtain slider 30. Through the provision of a plurality of fixed pulleys, the first traction rope 63 and the second traction rope 64 are more reliably supported, so that the traction loop formed by them operates stably and reliably, and the stability of the upward or downward movement of the curtain slider 30 is improved. In addition, in other embodiments, the second fixed pulley 69, the third fixed pulley 610, the fourth fixed pulley 611 and the fifth fixed pulley 612 are all replaced with U-shaped fixed slide groove components to play a guiding and supporting role. In addition, the second fixed pulley 69 used to support the first traction rope 63 and the second traction rope 64 can be the same fixed pulley, or two coaxial fixed pulleys, or staggered in height, or staggered in front and back; similarly, the third fixed pulley 610 used to support the first traction rope 63 and the second traction rope 64 can be the same fixed pulley, or two coaxial fixed pulleys, or staggered in height, or staggered in front and back.

[0100] Furthermore, if Figures 9 to 11As shown, the retracting and unfolding transmission unit also includes two traction rope pre-tightening springs 70, both of which extend left and right along the width direction of the curtain body 20; one end of one traction rope pre-tightening spring 70 is fixed to the left curtain slider 30, and the other end of the traction rope pre-tightening spring 70 is fixed to the left end of the first traction rope 63, while the right end of the first traction rope 63 is directly fixed to the right curtain slider 30; one end of the other traction rope pre-tightening spring 70 is fixed to the right curtain slider 30, and the other end of the traction rope pre-tightening spring 70 is fixed to the right end of the second traction rope 64, while the left end of the second traction rope 64 is directly fixed to the left curtain slider 30. Due to the dimensional tolerance of the traction rope, thermal expansion and contraction due to temperature, and the deformation side length after long-term use, the length of the traction rope will change slightly; at the same time, when the curtain movable guide rail 151 switches between the storage and unfolding states, the length of the traction rope will also change. The setting of the traction rope pre-tightening spring 70 can absorb the length change of this part of the traction rope, tighten the first traction rope 63 and the second traction rope 64 at all times, and then keep the third traction rope 61, the fourth traction rope 62, the first traction rope 63 and the second traction rope 64 in a taut state, thereby improving the accuracy of driving the curtain slider 30 to move up or down, and also driving the accuracy of the curtain body 20 to be stored and unfolded. In addition, the arrangement structure of the traction rope pre-tightening spring 70 in this embodiment enables the traction rope pre-tightening spring 70 to rigidly pull the first traction rope 63 and the second traction rope 64, and the effect is good.

[0101] Furthermore, if Fig. 9 As shown, the curtain reel 80 is a hollow shaft, and a rewinding spring 110 is installed inside the curtain reel 80. The rewinding spring 110 applies a rewinding force to the curtain reel 80 to drive the curtain reel 80 to rewind. Fig.14 As shown, the curtain reel 80 is used as a power shaft. In this way, during the rewinding process of the curtain body 20, the curtain body 20 is conveniently wound on the curtain reel 80 and stored in a roll shape under the action of the rewinding force constantly applied by the rewinding spring 110 to the curtain reel 80; during the unfolding process of the curtain body 20, the curtain body 20 can also be ensured to be flat in the vertical direction under the action of the rewinding force constantly applied by the rewinding spring 110 to the curtain reel 80.

[0102] Furthermore, if Fig.15As shown, the curtain retracting and unfolding mechanism further includes a spring piece 120 fixed at the left and right edges of the curtain body 20, the upper end of the spring piece 120 is fixed on the curtain reel 80, and the lower end of the spring piece 120 is fixed on the curtain slider 30. The spring piece 120 is unfolded with the unfolding of the curtain body 20, and is retracted with the retraction of the curtain body 20. When the spring piece 120 is unfolded with the unfolding of the curtain body 20, the spring piece 120 is accommodated in the curtain movable guide rail 151, and the outer edge of the spring piece 120 is clamped in the curtain movable guide rail 151. With the slightly smaller width design of the curtain body 20 (that is, the width of the curtain body 20 is less than the spacing between a pair of curtain movable guide rails 151) and the elasticity of the material of the curtain body 20, the curtain body 20 is constantly tightened in the horizontal direction, thereby ensuring the flatness of the curtain body 20 in the horizontal direction.

[0103] Embodiment 2 of the curtain retracting and extending mechanism

[0104] Since the traction rope is only subjected to tension but not thrust, when the traction and extension transmission unit of the first embodiment of the curtain folding and unfolding mechanism drives the left and right curtain sliders 30 to move up or down, the curtain slider 30 connected to the traction rope subjected to tension moves first, which causes the left and right curtain sliders 30 to move up or down at different times, that is, the left and right curtain sliders 30 have a height deviation due to the time difference in movement. At the same time, when the curtain movable guide rail 151 switches between the storage and unfolding states, the traction rope preload spring 70 may actually absorb inconsistent changes in the length of the traction rope, which may also cause the height of the left and right curtain sliders 30 to be inconsistent. A combination of multiple factors can easily cause the curtain lower edge strip 90 at the lower end of the curtain body 20 to be uneven when moving.

[0105] In order to avoid the above undesirable phenomenon, the curtain retracting and extending mechanism embodiment 2 retracting and extending transmission unit is additionally provided with a first fixed pulley 67 and a fifth traction rope 68 on the basis of the curtain retracting and extending transmission unit of embodiment 1. Fig.16 As shown, in the second embodiment of the curtain retracting and extending mechanism, along the width direction of the curtain body 20, the first fixed pulley 67 is distributed on the left side of the retracting and extending driving source 40, and the first anchor point 65 and the second anchor point 66 are movably distributed between the retracting and extending driving source 40 and the first fixed pulley 67; at the same time, the first fixed pulley 67 is higher than the first anchor point 65 and the second anchor point 66. The fifth traction rope 68 is wound around the first fixed pulley 67, and the two ends of the fifth traction rope 68 are fixed to the first anchor point 65 and the second anchor point 66 respectively.

[0106] when Fig.16When the retracting and extending driving source 40 drives the retracting component 50 to rotate clockwise, the first anchor point 65 moves to the right, and the first anchor point 65 causes the first traction rope 63 on the left side to be pulled, directly pulling the left curtain slider 30 downward; the first anchor point 65 simultaneously pulls the second anchor point 66 to the left through the fifth traction rope 68, thereby causing the second traction rope 64 on the right side of the second anchor point 66 to be pulled, directly pulling the right curtain slider 30 downward, and finally the left and right curtain sliders 30 move downward at the same time, eliminating the time difference and height deviation. On the contrary, when Fig.17 When the retracting and extending driving source 40 drives the retracting component 50 to rotate counterclockwise, the second anchor point 66 moves to the right, and the second anchor point 66 causes the second traction rope 64 on the left side to be pulled, directly pulling the left curtain slider 30 upward; the first anchor point 65 simultaneously pulls the first anchor point 65 to the left through the fifth traction rope 68, thereby causing the first traction rope 63 on the right side of the first anchor point 65 to be pulled, directly pulling the right curtain slider 30 upward, and finally the left and right curtain sliders 30 move up at the same time, eliminating the time difference and height deviation.

[0107] Embodiment 3 of the curtain retracting and extending mechanism

[0108] The difference between the third embodiment of the curtain folding and unfolding mechanism and the first embodiment of the curtain folding and unfolding mechanism is that the structure of the traction assembly is different. Fig.18 and Fig.19 As shown, the traction assembly in the third embodiment of the curtain retracting and unfolding mechanism includes a retracting component 50 that can rotate around a fixed axis, a fixed support pulley 613 (i.e., a fixed pulley) that can rotate around a fixed axis, and a sixth traction rope 614 that is passed around the fixed support pulley 613; the retracting and unfolding driving source 40 is a motor and is in transmission connection with the retracting component 50; both ends of the sixth traction rope 614 are wound in the wire groove of the retracting component 50, and the section of the sixth traction rope 614 distributed on one side of the fixed support pulley 613 is fixed to the first traction rope 63 through a first anchor point 65, and the section of the sixth traction rope 614 distributed on the other side of the fixed support pulley 613 is fixed to the second traction rope 64 through a second anchor point 66. In the left-right direction, the first anchor point 65 and the second anchor point 66 are distributed between the fixed support pulley 613 and the retracting and unfolding driving source 40 so as to be movable left-right.

[0109] Fig.18In the curtain retracting and unfolding mechanism shown, the curtain body 20 is in the retracted state. When the retracting and unfolding driving source 40 drives the retracting component 50 to rotate clockwise, the sixth traction rope 614 wound on the lower part of the retracting component 50 is in the retracted state, driving the first anchor point 65 to move rightward, and directly pulling the left curtain slider 30 downward through the first traction rope 63; at the same time, the sixth traction rope 614 wound on the upper part of the retracting component 50 is in the released state, but under the action of the fixed support pulley 613 and the same sixth traction rope 614, the second anchor point 66 is driven to move leftward, and the right curtain slider 30 is directly pulled downward through the second traction rope 64. Since the rightward movement of the first anchor point 65 and the leftward movement of the second anchor point 66 are carried out simultaneously, the left and right curtain sliders 30 are moved downward at the same time, eliminating the time difference and height deviation.

[0110] when Fig.19 When the retracting and extending driving source 40 drives the retracting component 50 to rotate counterclockwise, the sixth traction rope 614 wound around the upper part of the retracting component 50 is in a retracted state, and the second anchor point 66 moves to the right, and the left curtain slider 30 is directly pulled upward by the second traction rope 64; at the same time, the sixth traction rope 614 wound around the lower part of the retracting component 50 is in a released state, but under the action of the fixed support pulley 613 and the same sixth traction rope 614, the first anchor point 65 is driven to move left, and the right curtain slider 30 is directly pulled upward by the first traction rope 63, so that the left and right curtain sliders 30 move up at the same time, eliminating the time difference and height deviation.

[0111] Furthermore, if Fig.18 As shown, the third embodiment of the curtain folding and extending mechanism is also provided with a second fixed pulley 69, a third fixed pulley 610, a fourth fixed pulley 611 and a fifth fixed pulley 612. The supporting and guiding structure of the second fixed pulley 69, the third fixed pulley 610, the fourth fixed pulley 611 and the fifth fixed pulley 612 for the first traction rope 63 and the second traction rope 64 is the same as that of the first embodiment of the curtain folding and extending mechanism, and will not be repeated here.

[0112] Embodiment 4 of the curtain retracting and extending mechanism

[0113] The difference between the fourth embodiment of the curtain retracting and extending mechanism and the first embodiment of the curtain retracting and extending mechanism is that the traction rope preload spring 70 is arranged differently. Fig. 20 As shown, the two traction rope pre-tensioning springs 70 extend up and down, the traction rope pre-tensioning spring 70 on the left is installed on the fifth fixed pulley 612 and acts on the first traction rope 63, and the traction rope pre-tensioning spring 70 on the right is installed on the fourth fixed pulley 611 and acts on the second traction rope 64.

[0114] Embodiment 5 of the curtain retracting and extending mechanism

[0115] The difference between the fifth embodiment of the curtain retracting and extending mechanism and the first embodiment of the curtain retracting and extending mechanism is that the traction rope preload spring 70 is arranged differently. Fig.21 As shown, both traction rope pre-tensioning springs 70 extend up and down, the traction rope pre-tensioning spring 70 on the left is installed in the vertical rope section of the second traction rope 64 close to the curtain slider 30, and the traction rope pre-tensioning spring 70 on the right is installed in the vertical rope section of the first traction rope 63 close to the curtain slider 30. The traction rope pre-tensioning springs 70 are distributed on the upper side of the curtain slider 30.

[0116] In summary, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0117] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A curtain folding and unfolding mechanism, comprising a fixed curtain frame (10), a curtain body (20) foldably mounted on the curtain frame (10), curtain sliders (30) fixed to both sides of the curtain body (20) along the width direction of the curtain body (20), a folding and unfolding driving source (40), and a folding and unfolding transmission unit, wherein the folding and unfolding driving source (40) is connected to the curtain sliders (30) via the folding and unfolding transmission unit; characterized in that: The retracting and extending transmission unit comprises a traction assembly, and a first traction rope (63) and a second traction rope (64) both connected between the curtain sliders (30) on both sides of the curtain body (20); the first traction rope (63) is provided with a first anchor point (65), the second traction rope (64) is provided with a second anchor point (66); the retracting and extending driving source (40) is connected to the first anchor point (65) and the second anchor point (66) respectively through the traction assembly; a portion of the first traction rope (63) and / or the second traction rope (64) is used to be bent and accommodated in a curtain movable guide rail (151) outside the curtain body (20); When the retraction and extension driving source (40) is activated, the moving directions of the first anchor point (65) and the second anchor point (66) are opposite.

2. The curtain retracting and extending mechanism according to claim 1, characterized in that: The traction assembly comprises a retracting component (50) that can rotate around a fixed axis, and a third traction rope (61) and a fourth traction rope (62) both wound around the retracting component (50); the retracting and unfolding driving source (40) is transmission-connected to the retracting component (50); an end of the third traction rope (61) is fixed to the first traction rope (63) via a first anchor point (65); and an end of the fourth traction rope (62) is fixed to the second traction rope (64) via a second anchor point (66); When the retracting and extending driving source (40) drives the retracting component (50) to rotate, the third traction rope (61) and the fourth traction rope (62) are respectively in a retracted state and a released state.

3. The curtain retracting and extending mechanism according to claim 2, characterized in that: The retracting and extending transmission unit further comprises a first fixed pulley (67) and a fifth traction rope (68) wound around the first fixed pulley (67), wherein two ends of the fifth traction rope (68) are respectively fixed to the first anchor point (65) and the second anchor point (66); Along the width direction of the curtain body (20), the first anchor point (65) and the second anchor point (66) are movably distributed between the retraction and extension driving source (40) and the first fixed pulley (67).

4. The curtain retracting and extending mechanism according to claim 1, characterized in that: The traction assembly comprises a reeling component (50) that can rotate around a fixed axis, a fixed support pulley (613) that can rotate around the fixed axis, and a sixth traction rope (614) that is wound around the fixed support pulley (613); the reeling and unfolding drive source (40) is transmission-connected to the reeling component (50); both ends of the sixth traction rope (614) are wound around the reeling component (50); the section of the sixth traction rope (614) distributed on one side of the fixed support pulley (613) is fixed to the first traction rope (63) via a first anchor point (65); and the section of the sixth traction rope (614) distributed on the other side of the fixed support pulley (613) is fixed to the second traction rope (64) via a second anchor point (66); When the retracting and extending driving source (40) drives the retracting component (50) to rotate, the two ends of the sixth traction rope (614) on the retracting component (50) are respectively in a retracted state and a released state.

5. The curtain retracting and extending mechanism according to claim 2 or 4, characterized in that: The retractable driving source (40) is a fixedly arranged motor, the retractable component (50) is a cylinder and is fixed on the output shaft of the retractable driving source (40), and a wire groove is provided on the outer periphery of the retractable component (50).

6. The curtain retracting and extending mechanism according to claim 1, characterized in that: The retracting and extending transmission unit further comprises a second fixed pulley (69) and a third fixed pulley (610) symmetrically installed in the top interior space (144), and a fourth fixed pulley (611) and a fifth fixed pulley (612) symmetrically installed in the curtain movable guide rail (151); the first traction rope (63) distributed on one side of the first anchor point (65) is supported by the second fixed pulley (69); the first traction rope (63) distributed on the other side of the first anchor point (65) is supported by the third fixed pulley (610) and the fifth fixed pulley (612); the second traction rope (64) distributed on one side of the second anchor point (66) is supported by the second fixed pulley (69) and the fourth fixed pulley (611); and the second traction rope (64) distributed on the other side of the second anchor point (66) is supported by the third fixed pulley (610).

7. The curtain retracting and extending mechanism according to claim 6, characterized in that: The retraction and extension transmission unit also includes a traction rope pre-tensioning spring (70) extending up and down, and there are two traction rope pre-tensioning springs (70) which are respectively installed on the fourth fixed pulley (611) and the fifth fixed pulley (612), and the two traction rope pre-tensioning springs (70) act on the first traction rope (63) and the second traction rope (64) respectively.

8. The curtain retracting and extending mechanism according to claim 1, characterized in that: The retraction and extension transmission unit also includes a traction rope pre-tensioning spring (70) extending along the width direction of the curtain body (20), and there are two traction rope pre-tensioning springs (70) which are respectively fixed on each curtain slider (30); the first traction rope (63) and the second traction rope (64) are both: one end of the rope is fixed to one curtain slider (30), and the other end of the rope is fixed to the traction rope pre-tensioning spring (70) on the other curtain slider (30).

9. The curtain retracting and extending mechanism according to claim 1, characterized in that: The retraction and extension transmission unit also includes a traction rope pre-tightening spring (70) extending up and down. There are two traction rope pre-tightening springs (70) which are respectively installed in the vertical rope sections of the first traction rope (63) and the second traction rope (64) close to the curtain slider (30).

10. The curtain retracting and extending mechanism according to claim 1, characterized in that: It also includes a curtain reel (80) rotatably mounted on the curtain frame (10), and a curtain bottom strip (90) fixed at the lower edge of the curtain body (20), the curtain reel (80) extends straight along the width direction of the curtain body (20), the upper edge of the curtain body (20) is fixed to the curtain reel (80), the curtain bottom strip (90) covers the lower edge of the curtain body (20) along the width direction of the curtain body (20), and the curtain sliders (30) are provided with two sliders (30) which are symmetrically fixed at the two ends of the curtain bottom strip (90).

11. The curtain retracting and extending mechanism according to claim 10, characterized in that: The curtain reel (80) is a hollow shaft, and a rewinding spring (110) is installed inside the curtain reel (80).

12. The curtain retracting and extending mechanism according to claim 1, characterized in that: Spring sheets (120) are fixed at both edges of the curtain body (20) in the width direction. The spring sheets (120) are used to be accommodated and clamped in the curtain movable guide rails (151). The width of the curtain body (20) is smaller than the distance between the pair of curtain movable guide rails (151).

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