Curtain and bearing rope winding and unwinding device thereof

Abstract

The embodiment of the utility model provides a curtain and a bearing rope winding and unwinding device thereof. The bearing rope winding and unwinding device comprises a base provided with a rope outlet; the rope winding wheel is pivoted on the base and is provided with at least two rope winding grooves; the rope guide mechanism is arranged on the base; one end of each bearing rope is wound in the corresponding rope winding groove in the same direction, and the other opposite end of each bearing rope extends out of the rope outlet under the guide of the rope guide mechanism after being led out of the rope winding groove; the rope guide mechanism comprises a synchronous guide assembly, and the synchronous guide assembly comprises a mandrel arranged beside the rope winding wheel in parallel with the rope winding wheel; the core shaft is sleeved with the sliding sleeve in an axial sliding mode, at least two annular guide grooves are formed in the outer side face of the sliding sleeve, the width of the groove bottom of each annular guide groove is matched with the diameter of the corresponding bearing rope, and the center distance between any two adjacent annular guide grooves is equal to the distance between the leading-out positions of the bearing ropes in any two adjacent rope winding grooves. The embodiment can ensure that the two ends of the curtain body of the curtain synchronously ascend and descend.

Description

Technical Field

[0001] This utility model relates to the field of curtain accessories technology, and in particular to a curtain and its carrying rope receiving and dispatching device. Background Technology

[0002] Currently, existing curtains typically include a top beam, a cord winding device assembled on the top beam, and a curtain body located below the top beam. The cord winding device includes a base, a cord winding wheel pivotally mounted on the base, a cord wound around the cord winding wheel at its top end and connected to the curtain body at its bottom end, and a power mechanism for driving the cord winding wheel to rotate. Typically, at least two cords are symmetrically connected to the curtain body in its width direction to support the curtain body, ensuring balanced force and preventing the curtain from tilting during lifting and lowering.

[0003] Therefore, a curtain carrying rope receiving and dispatching device has a rope winding wheel that typically has at least two rope winding grooves arranged side by side along the axial direction on its outer side. Each of the rope winding grooves has a corresponding carrying rope wound in it. Each of the carrying ropes led out from each rope winding groove of the rope winding wheel passes through the corresponding guide rod and then passes down through the upper beam from the corresponding position on the upper beam before being symmetrically connected to the curtain body.

[0004] However, the inventors discovered during implementation that when the winding wheel winds up the carrying rope, the winding position of each carrying rope in the corresponding winding groove moves one turn at a time along the axis of the winding wheel. The winding contact point of the carrying rope on the guide rod also undergoes axial change. However, since there is no structure on the guide rod to guide the axial movement of the carrying rope, it is difficult to keep the axial movement of each carrying rope on the guide rod synchronized. This easily leads to inconsistent winding lengths of each carrying rope on the winding wheel. Consequently, when releasing the carrying rope from the winding wheel, the lengths of each carrying rope released will also be inconsistent. It is evident that the existing carrying rope winding and unwinding device cannot guarantee the synchronicity of the winding and unwinding of each carrying rope, which easily causes the curtain to tilt at one end higher than the other when it is raised or lowered. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is to provide a curtain support rope raising and lowering device that can ensure that the two ends of the curtain body rise and fall synchronously.

[0006] The technical problem to be solved by this utility model embodiment is to provide a curtain that can ensure that both ends of the curtain rise and fall synchronously.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a curtain cord retraction device, comprising:

[0008] A base with a rope outlet at a predetermined location;

[0009] A winding wheel is pivotally arranged on the base and has at least two winding grooves arranged side by side along the axial direction;

[0010] A guide mechanism is arranged on the base and between the winding wheel and the rope outlet;

[0011] At least two carrying ropes are arranged in one-to-one correspondence with the winding grooves, one end of each of the carrying ropes is wound in the corresponding winding groove in the same direction, and the other end is drawn out of the winding groove and then extends out of the rope outlet under the guidance of the guide mechanism.

[0012] The guide mechanism comprises a synchronous guiding assembly, and the synchronous guiding assembly comprises:

[0013] A mandrel is arranged on the side of the winding wheel parallel to the winding wheel; and

[0014] A sliding sleeve is axially slidably sleeved on the mandrel, and the outer side of the sliding sleeve is provided with at least two annular guide grooves arranged in one-to-one correspondence with the winding grooves and distributed side by side in the axial direction, the groove bottom width of the annular guide groove is matched with the diameter of the carrying rope, and the center distance of any two adjacent annular guide grooves is the same as the interval of the drawing-out positions of the carrying ropes in any two adjacent winding grooves.

[0015] Further, the synchronous guiding assembly is provided with at least two and is arranged in the corresponding corners of the base in parallel to each other, the carrying ropes drawn out of the winding wheel are sequentially wound through each of the synchronous guiding assemblies and then extend to the rope outlet, the winding wheel is arranged at one end of the base and is located inside the travel path of the carrying ropes sequentially between each of the synchronous guiding assemblies.

[0016] Further, the guide mechanism further comprises a plurality of guide rods arranged between the synchronous guiding assembly and the rope outlet and having smooth outer surfaces, the guide rods are parallel to the mandrel, and the carrying ropes sequentially extend around the outer surfaces of the guide rods after extending out of the synchronous guiding assembly and then extend out of the rope outlet.

[0017] Further, the cross section of the annular guide groove is V-shaped or U-shaped.

[0018] Further, the rope outlet is arranged at one end of the base away from the winding wheel, one of the guide rods is arranged on the inner side of the rope outlet, and a partition rod is assembled in the rope outlet, the partition rod separates the rope outlet into a plurality of passages in the axial direction of the guide rod, and the number of the passages is the same as the number of the carrying ropes, and each of the carrying ropes corresponds to one of the passages.

[0019] Further, the base is provided with one of the rope outlets at each of the opposite ends.

[0020] Further, the base comprises a bottom shell and a shell cover which are buckled to each other to form a mounting space for accommodating the winding wheel and the guide rope mechanism, and the rope outlet is arranged on the bottom shell.

[0021] Further, the device further comprises a planar spiral spring mechanism assembled in the mounting space for driving the winding wheel to rotate to wind the load-bearing rope, a driving gear is coaxially arranged on an output shaft of the planar spiral spring mechanism, a driven gear is coaxially arranged on the winding wheel, and the driving gear and the driven gear are meshed with each other.

[0022] Further, a fixing hole for fixing the end of the load-bearing rope is arranged in each winding groove, and the fixing holes arranged in each winding groove are arranged in a straight line at equal intervals in the axial direction of the winding wheel, and the interval between any two adjacent fixing holes is the same as the center distance between any two adjacent annular guide grooves.

[0023] On the other hand, in order to solve the above-mentioned further technical problem, the utility model embodiment provides the following technical scheme: a window curtain, comprising: an upper beam, a load-bearing rope winding and unwinding device assembled on the upper beam, and a curtain body arranged below the upper beam and connected with the load-bearing rope of the load-bearing rope winding and unwinding device and rising correspondingly under the driving of the load-bearing rope winding and unwinding device, wherein the load-bearing rope winding and unwinding device is any one of the load-bearing rope winding and unwinding devices mentioned above.

[0024] After the above technical scheme is adopted, the utility model embodiment at least has the following beneficial effects: the utility model embodiment adds a synchronous guide assembly on the side of the winding wheel, and the synchronous guide assembly comprises a mandrel and a sliding sleeve slidingly arranged on the mandrel, an annular guide groove corresponding to the winding groove and arranged in parallel in the axial direction is arranged on the outer side of the sliding sleeve to accommodate each load-bearing rope, the groove bottom width of the annular guide groove is designed to be matched with the diameter of the load-bearing rope, the axial sliding of the load-bearing rope in the corresponding annular guide groove can be effectively prevented, and only the axial sliding of the sliding sleeve can be driven, in the process of winding and unwinding the load-bearing rope, the load-bearing rope is wound and unwound in the winding groove along the axial direction of the winding wheel, and the sliding sleeve is axially slid on the mandrel synchronously, and in addition, the center distance of any two adjacent annular guide grooves is designed to be the same as the interval of the lead-out positions of the load-bearing rope in any two adjacent winding grooves, so that the winding and unwinding lengths of each load-bearing rope remain consistent, and the curtain body connected with the other end of each load-bearing rope can be balanced and lifted, and skewing does not occur. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a split structure schematic view of an optional embodiment of the load-bearing rope winding and unwinding device of the utility model window curtain.

[0026] Figure 2It is a split structure schematic view of another angle of the optional embodiment of the bearing rope take-up and pay-off device of the curtain.

[0027] Figure 3 It is an assembly structure schematic view of the optional embodiment of the bearing rope take-up and pay-off device of the curtain.

[0028] Figure 4 It is a cross-sectional structure schematic view of the optional embodiment of the bearing rope take-up and pay-off device of the curtain along the plane of the central axis of the core shaft and the winding rope wheel.

[0029] Figure 5 It is a cross-sectional structure schematic view of the optional embodiment of the bearing rope take-up and pay-off device of the curtain along the central axis of the shell length.

[0030] Figure 6 It is a cross-sectional structure schematic view of the optional embodiment of the bearing rope take-up and pay-off device of the curtain along the central axis of the partition rod length.

[0031] Figure 7 It is a split structure schematic view of the optional embodiment of the curtain.

[0032] Figure 8 It is an assembly structure schematic view of the optional embodiment of the curtain. DETAILED DESCRIPTION

[0033] The application will be further described below in conjunction with the drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the application and are not intended to limit the application, and the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0034] As shown in Figures 1-6 , the application provides a bearing rope take-up and pay-off device 1 of a curtain, which comprises:

[0035] a base 10 provided with a rope outlet 101 at a predetermined position;

[0036] a winding rope wheel 12 pivotally arranged on the base 10 and provided with at least two winding rope grooves 121 arranged side by side along the axial direction of the outer wheel surface;

[0037] a rope guide mechanism 14 arranged on the base 10 and located between the winding rope wheel 12 and the rope outlet 101; and

[0038] At least two load bearing ropes 16 are arranged in correspondence with the winding grooves 121, one end of each of the load bearing ropes 16 is wound in the corresponding winding groove 121 in the same direction, and the other end is drawn out of the winding groove 121 and then stretched out of the rope outlet 101 under the guidance of the rope guiding mechanism 14;

[0039] The rope guiding mechanism 14 comprises a synchronous guiding assembly 141, and the synchronous guiding assembly 141 comprises:

[0040] A mandrel 141a is arranged in parallel with the winding wheel 12 on the side of the winding wheel 12; and

[0041] A sliding sleeve 141b is axially slidably sleeved on the mandrel 141a, and the outer side of the sliding sleeve 141b is provided with at least two annular guide grooves 1410 which are arranged in correspondence with the winding grooves 121 and distributed in parallel in the axial direction, the groove bottom width of the annular guide groove 1410 is matched with the diameter of the load bearing rope 16, and the center distance of any two adjacent annular guide grooves 1410 is the same as the interval of the drawing positions of the load bearing ropes 16 in any two adjacent winding grooves 121.

[0042] In the embodiment of the utility model, the synchronous guiding assembly 141 is additionally arranged on the side of the winding wheel 12, the synchronous guiding assembly 141 comprises the mandrel 141a and the sliding sleeve 141b which is slidably sleeved on the mandrel 141a, the outer side of the sliding sleeve 141b is provided with the annular guide groove 1410 which is arranged in correspondence with the winding groove 121 and distributed in parallel in the axial direction to be correspondingly arranged for each load bearing rope 16, the groove bottom width of the annular guide groove 1410 is matched with the diameter of the load bearing rope 16, the axial sliding of the load bearing rope 16 in the corresponding annular guide groove 1410 can be effectively prevented, and only the axial sliding of the sliding sleeve 141b can be driven, in the process of winding and unwinding the load bearing rope 16, the load bearing rope 16 is wound and unwound in the winding groove 121 along the axial direction of the winding wheel 12, and the sliding sleeve 141b is synchronously axially slid on the mandrel 141a, and in addition, the center distance of any two adjacent annular guide grooves 1410 is matched with the interval of the drawing positions of the load bearing ropes 16 in any two adjacent winding grooves 121, so that the winding and unwinding lengths of each load bearing rope 16 are always consistent, and the curtain body connected with the other end of each load bearing rope 16 can always be balanced and lifted, and skewing does not occur.

[0043] In specific implementation, the winding grooves 121 on the winding wheel 12 can be two, three or more, and the corresponding number of load bearing ropes 16 are assembled to adapt to different widths of the curtain. Figures 1-6 In the embodiment shown in the drawing, two winding grooves 121 are arranged on the winding wheel 12, and two load bearing ropes 16 are correspondingly arranged.

[0044] In an optional embodiment of the utility model, as shown in the drawing,Figure 1 and Figure 6 As shown in the figure, the synchronous guide assembly 141 is provided with at least two and is arranged in the corresponding corner of the base 10 in parallel, the carrying rope 16 drawn out from the winding wheel 12 is sequentially wound through each synchronous guide assembly 141 and then extends to the rope outlet 101, and the winding wheel 12 is arranged at one end of the base 10 and is located inside the travel path of the carrying rope 16 sequentially between each synchronous guide assembly 141. In this embodiment, by arranging the synchronous guide assembly 141 in the corresponding corner of the base 10, the distance between adjacent carrying ropes 16 can be effectively maintained on the moving path of the carrying rope 16, which is beneficial to maintaining the consistent length of each carrying rope 16.

[0045] In an optional embodiment of the utility model, as shown in the figure, Figures 1-3 and Figure 6 As shown in the figure, the rope guide mechanism 14 further includes a plurality of guide rods 143 arranged in sequence along the moving path of the carrying rope 16 between the synchronous guide assembly 141 and the rope outlet 101 and having smooth outer surfaces, and the carrying rope 16 sequentially winds through the outer surfaces of each guide rod 143 after being drawn out from the synchronous guide assembly 141 and then is drawn out from the rope outlet 101. In this embodiment, by arranging a plurality of guide rods 143 with smooth outer surfaces between the synchronous guide assembly 141 and the rope outlet 101, the travel path of the carrying rope 16 is gradually guided by the guide rods 143, avoiding interference between the carrying rope 16 and other structures of the base 10 during the travel process.

[0046] In an optional embodiment of the utility model, the cross section of the annular guide groove 1410 is V-shaped or U-shaped (as shown in the figure). Figure 4 In this embodiment, the cross section of the annular guide groove 1410 can be designed in V-shaped or U-shaped, so as to effectively position the carrying rope 16 and prevent the carrying rope 16 from axially slipping in the annular guide groove 1410 and from being pulled out of the annular guide groove 1410.

[0047] In an optional embodiment of the utility model, as shown in the figure, Figure 2 , Figures 5-6As shown, the rope outlet 101 is arranged on the base 10 away from one end of the rope winding wheel 12, and an inner side of the rope outlet 101 is provided with a guide rod 143, and the rope outlet 101 is also assembled with a separation rod 103, the separation rod 103 separates the rope outlet 101 in the axial direction of the guide rod 143 into a plurality of passages 101a with the same number as the number of the bearing ropes 16, and each of the bearing ropes 16 corresponds to the passage 101a and extends out from the passage 101a. In the embodiment, the guide rod 143 arranged on the inner side of the rope outlet 101 facilitates the change of the direction of the bearing rope 16, and the separation rod 103 separates the rope outlet 101 into a plurality of passages 101a, so that each of the bearing ropes 16 extends out from the different passage 101a, and interference between the bearing ropes 16 in the rope outlet 101 is avoided.

[0048] In an optional embodiment of the utility model, the base 10 is provided with the rope outlet 101 at each of opposite ends. In the embodiment, the rope outlet 101 is arranged at each of opposite ends of the base 10, so that different bearing ropes 16 can extend out from the opposite ends of the base 10, and then connect the curtain body 5, and the bearing rope winding and unwinding device 1 can be conveniently assembled to the middle section of the top rail 3 of the window curtain. Moreover, when necessary, all the bearing ropes 16 can extend out from the rope outlet 101 at one end of the base 10, and the bearing rope winding and unwinding device 1 is arranged at one end of the top rail 3. It can be seen that the embodiment enriches the installation position of the bearing rope winding and unwinding device 1 on the top rail 3, and the installation position can be flexibly selected and adjusted according to actual application requirements.

[0049] In an optional embodiment of the utility model, as shown in Figures 1-6 The base 10 includes a bottom shell 10a and a shell cover 10b that are buckled to each other to form an installation space 10c for accommodating the rope winding wheel 12 and the rope guiding mechanism 14, and the rope outlet 101 is arranged on the bottom shell 10a. In the embodiment, the base 10 is buckled by the bottom shell 10a and the shell cover 10b to form the installation space 10c for accommodating the rope winding wheel 12 and the rope guiding mechanism 14, so that the internal structure can be effectively protected, and the protection effect is achieved.

[0050] In an optional embodiment of the utility model, as shown in Figures 1-6As shown, the device further comprises a planar spiral spring mechanism 18 assembled in the mounting space 10c for driving the winding rope wheel 12 to rotate to wind the load bearing rope 16, a driving gear 1810 is coaxially arranged on an output shaft 181 of the planar spiral spring mechanism 18, a driven gear 123 is coaxially arranged on the winding rope wheel 12, and the driving gear 1810 and the driven gear 123 are in meshing with each other. In this embodiment, the planar spiral spring mechanism 18, a common power mechanism, is adopted to drive the winding rope wheel 12, and the driving is achieved by the meshing of the driving gear 1810 on the output shaft 181 of the planar spiral spring mechanism 18 and the driven gear 123 on the winding rope wheel 12, so that the structure is simple and the driving is stable.

[0051] In an optional embodiment of the present application, as shown in Figures 1-5 each winding rope groove 121 is provided with a fixing hole 125 for fixing the end of the load bearing rope 16, each fixing hole 125 arranged in each winding rope groove 121 is arranged in a straight line at equal intervals in the axial direction of the winding rope wheel 12, and the interval between any two adjacent fixing holes 125 is the same as the center distance between any two adjacent annular guide grooves 1410. In this embodiment, the fixing hole 125 arranged in each winding rope groove 121 for fixing the end of the load bearing rope 16 is designed to be arranged in a straight line at equal intervals in the axial direction of the winding rope wheel 12, and the interval between any two adjacent fixing holes 125 is the same as the center distance between any two adjacent annular guide grooves 1410, so that the load bearing rope 16 can be wound synchronously in the corresponding annular guide groove 1410, and the interval between the leading positions of the load bearing rope 16 in any two adjacent winding rope grooves 12 is the same as the center distance between any two adjacent annular guide grooves 1410, so that the lengths of the load bearing ropes 16 that are wound synchronously are always consistent.

[0052] On the other hand, as shown in Figures 7-8 the present application provides a window curtain, which comprises an upper beam 3, a load bearing rope winding and unwinding device 1 assembled on the upper beam 3, and a curtain body 5 arranged below the upper beam 3 and connected with the load bearing rope 16 of the load bearing rope winding and unwinding device 1 to be lifted correspondingly under the driving of the load bearing rope winding and unwinding device 1, and the load bearing rope winding and unwinding device 1 is the load bearing rope winding and unwinding device 1 in any of the above embodiments. In this embodiment, the window curtain provided by the load bearing rope winding and unwinding device 1 in any of the above embodiments can effectively realize the stable lifting of both ends of each curtain body 5. Figures 7-8 In the embodiment, the window curtain is a venetian window curtain, and it can be understood that the window curtain can also be a roman curtain, a honeycomb curtain or other window curtain products that use load bearing ropes to suspend and drive the curtain body 5 to lift.

[0053] The embodiments of the present application are described above with reference to the drawings; however, the present application is not limited to the specific embodiments described above, but the specific embodiments described above are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these all belong to the protection scope of the present application.

Claims

1. A carrier cord winding and unwinding device of a window curtain, comprising: a base provided with a cord outlet at a predetermined position; a winding wheel pivotally arranged on the base and provided with at least two winding grooves arranged side by side along an axial direction; a guide mechanism arranged on the base and between the winding wheel and the cord outlet; and at least two carrier cords corresponding to the winding grooves, one end of each of the carrier cords being wound in the corresponding winding groove in the same direction and the other end being led out of the winding groove and then being led out of the cord outlet under the guidance of the guide mechanism. The device is characterized in that the guide mechanism comprises a synchronous guiding assembly, which comprises: a mandrel arranged on the side of the winding wheel in parallel with the winding wheel; and a sliding sleeve axially slidably sleeved on the mandrel, the outer side of the sliding sleeve being provided with at least two annular guide grooves corresponding to the winding grooves and arranged side by side along the axial direction, the groove bottom width of the annular guide grooves being matched with the diameter of the carrier cord, and the center distance between any two adjacent annular guide grooves being the same as the distance between the leading positions of the carrier cords in any two adjacent winding grooves. The synchronous guiding assembly is provided with at least two synchronous guiding assemblies arranged in parallel with each other at the corresponding corners of the base, the carrier cords led out of the winding wheel are sequentially wound around each of the synchronous guiding assemblies and then extended towards the cord outlet, the winding wheel is arranged at one end of the base and located inside the path of the carrier cords sequentially passing through each of the synchronous guiding assemblies.

2. A carrier cord retraction device for a window shade as defined in claim 1, wherein, The guide mechanism further comprises a plurality of guide rods arranged between the synchronous guiding assemblies and the cord outlet and having smooth outer surfaces, the guide rods are parallel to the mandrel, and the carrier cords sequentially pass through the outer surfaces of the guide rods and then are led out of the cord outlet after being led out of the synchronous guiding assemblies.

3. A carrier cord retraction device for a window shade as defined in claim 2, wherein, The cross section of the annular guide groove is V-shaped or U-shaped.

4. The carrier cord retraction device of claim 1, wherein, The cord outlet is arranged at one end of the base away from the winding wheel, one of the guide rods is arranged on the inner side of the cord outlet, and a partition rod is assembled in the cord outlet, the partition rod divides the cord outlet into a plurality of passages in the axial direction of the guide rod, and the number of the passages is the same as the number of the carrier cords, each of the carrier cords is led out of the passage one by one.

5. A carrier cord retraction device for a window shade as defined in claim 3, wherein, Each of the opposite ends of the base is provided with one of the cord outlets.

6. A carrier cord retraction device for a window shade as defined in claim 3, wherein, The base comprises a bottom shell and a shell cover which are buckled to each other to form a mounting space for accommodating the winding wheel and the guide mechanism, and the cord outlet is arranged on the bottom shell.

7. The carrier cord retraction device of claim 1, wherein, The device further comprises a planar spiral spring mechanism assembled in the mounting space for driving the winding wheel to rotate and wind the carrier cords, a driving gear is coaxially arranged on the output shaft of the planar spiral spring mechanism, a driven gear is coaxially arranged on the winding wheel, and the driving gear and the driven gear are engaged with each other.

8. A carrier cord retraction device for a window shade as defined in claim 7, wherein, Each of the winding grooves is provided with a fixing hole for fixing the end of the carrier cord, and each of the fixing holes arranged in each of the winding grooves is arranged in a straight line at equal intervals in the axial direction of the winding wheel, and the interval between any two adjacent fixing holes is the same as the center distance between any two adjacent annular guide grooves.

9. The cord winding and unwinding device of claim 1, wherein ​ 10. A window covering comprising: The upper beam, the load rope winding and unwinding device assembled on the upper beam, and the curtain body arranged below the upper beam and connected with the load rope of the load rope winding and unwinding device and corresponding raised under the driving of the load rope winding and unwinding device, characterized in that the load rope winding and unwinding device is the load rope winding and unwinding device according to any one of claims 1-9.

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