WO2018018727A1 - Retractable/extensible shade - Google Patents

Abstract

A retractable/extensible shade, comprising a bracket (300) and a retraction/extension device. The retraction/extension device comprises a synchronous pulley set (1) and winding assemblies (3). The synchronous pulley set (1) comprises at least one coil spring (12) and at least two synchronous pulleys (11) rotatably disposed on a mounting base (400), both ends of each coil spring (12) being fixedly connected to the two synchronous pulleys (11) respectively, so as to be wound on the two synchronous pulleys (11) in opposite directions. Each winding assembly (3) comprises a fixed base (31), a winding shaft (32) rotatably disposed on the fixed base (31), and a transmission shaft (33). The transmission shaft (33) is connected to at least one of the synchronous pulleys (11) directly or by means of a transmission assembly (2). The winding shaft (32) passes through the transmission shaft (33) and is coaxial with the transmission shaft (33. The extension directions of the axes of the transmission shafts (33) of the winding assemblies (2) are the same. The mounting base (400) and the fixed base (31) are separately and fixedly connected to the bracket (300). A limiting groove (301) is provided on the bracket (300). The extension direction of the central line of the limiting groove (301) is the same as that of the central line of the transmission shaft (33). Limiting protrusions (401, 312) matching the limiting groove (301) are provided on the mounting base (400) and the fixed base (31) respectively. The limiting protrusions (401, 312) are engaged in the limiting groove (301). By means of the mutual matching between the limiting protrusions and the limiting groove on the bracket, it is ensured that the synchronous pulley set and winding assemblies can be arranged along extension directions of the axes of the transmission shafts after being mounted, thereby avoiding staggering and facilitating mounting.

Description

 Retractable curtain

Technical field

The invention relates to the field of curtains, in particular to a retractable curtain.

Background technique

Curtains such as Roman blinds are generally retracted by a drawstring, and the drawstring is driven to be wound or unwound by a retracting device. In the prior art, the retracting device comprises a synchronous wheel set for driving the rope to wind up, a winding shaft for winding the rope, the winding shaft and one of the synchronous wheels are directly connected or connected by a transmission component, and the synchronous wheel set is connected. The coil is provided with a coil spring which provides a restoring force, and the drawstring is laminated and wound on the bobbin. The drawstring is inserted into the curtain body from the upper end of the curtain body, and passes through a plurality of wire wheel stacking rolls after being passed out from the upper end of the curtain body. Wrap around the bobbin. Since the curtain generally has a certain width, more than one drawstring is required, generally two or more, so that two or more spools are required correspondingly. In order to ensure the balance of the curtain body, these winding shafts and synchronous wheel sets should be installed as far as possible along a straight line extending in the width direction of the curtain to avoid misalignment between the winding shaft and the synchronous wheel set.

Summary of the invention

In order to solve the above technical problems, the present invention provides a retractable curtain that is easy to install.

In order to achieve the above object, the present invention adopts the following technical solutions:

A retractable curtain comprising a bracket for mounting a curtain body, a retracting device for retracting the curtain cord, the retracting device comprising at least one synchronizing wheel set, at least two winding assemblies; The synchronous wheel set includes at least one coil spring, at least two synchronous wheels rotatably disposed on the mounting seat, and two ends of each of the coil springs are fixedly coupled to the two synchronous wheels to be wound on the two synchronous wheels. The winding directions on the two synchronous wheels are opposite; each of the winding assemblies includes a fixing base, a winding shaft rotatably disposed on the fixing seat, and a transmission shaft, and the transmission shaft and the at least one synchronous wheel are directly Connected or connected by a transmission assembly, the winding shaft is disposed through the transmission shaft and coaxial, and the axis of the transmission shaft of each winding assembly extends in the same direction, and is characterized in that: the mounting seat and the The fixing group is fixedly connected to the bracket, and the bracket is provided with a finite slot, and the center line of the limiting slot and the center line of the transmission shaft extend in the same direction, and the mounting seat and the fixing seat are Separately set and limit Limiting protrusion cooperating grooves, each of the limiting projections disposed in the limiting slot card.

Preferably, the retracting device comprises a synchronous wheel set, a transmission assembly on both sides of the synchronous wheel set for changing a transmission direction, and each of the transmission components of each side is connected with one of the winding assemblies Each of the transmission assemblies includes a first bevel gear and a second bevel gear that mesh with each other, and the first bevel gears of the two transmission assemblies are coupled to at least one of the synchronization wheels; each of the winding assemblies The drive shaft is coupled to the corresponding second bevel gear.

Preferably, the retracting device comprises a synchronous wheel set, a transmission assembly on both sides of the synchronous wheel set for changing a transmission direction, and the winding assembly respectively connected to the transmission components on both sides. The transmission assembly of at least one side of the synchronous wheel set is coupled to at least two of the winding assemblies; each of the transmission assemblies includes a first bevel gear and a second bevel gear that mesh with each other, and the two transmission assemblies The first bevel gear is coupled to at least one of the synchronizing wheels; the drive shaft of each of the winding assemblies and the corresponding second bevel gear are coupled, and the drive shaft of the same side is coaxial.

Preferably, the retracting device comprises a plurality of the synchronous wheel sets and a plurality of the winding assemblies, and two sides of each of the synchronous wheel sets are respectively provided with a transmission component for changing a transmission direction, and each of the synchronous wheels The transmission assemblies on both sides of the group are respectively connected to at least one of the winding assemblies; each of the transmission assemblies respectively includes a first bevel gear and a second bevel gear that mesh with each other, the first of the two transmission assemblies a bevel gear is coupled to at least one of the synchronous wheels; each of the winding assemblies includes a fixed seat, a bobbin rotatably disposed on the fixed seat, and a drive shaft, the drive shaft and the corresponding The two bevel gears are connected.

Preferably, the rotation axis of the synchronous wheel and the axis of the transmission shaft extend in different directions.

More preferably, the axis of rotation of the synchronous wheel and the axis of the drive shaft are perpendicular to each other.

Preferably, an outer wall of the bobbin extends obliquely outward along an axial line of the drive shaft, and an end of the fixing seat corresponding to a larger outer diameter of the bobbin is provided for A threading hole through which the drawstring passes, the drawstring being connected to an end of the bobbin having a smaller outer diameter.

Preferably, the fixing seat is provided with a threading hole and a wire hole, the wire hole is a plurality of and is disposed at different positions of the fixing seat, the threading hole is located at an outer wall of the winding shaft and a plurality of the Between the wire holes.

In combination with the above, the present invention adopts the above structure, and has the following advantages compared with the prior art: the mutual cooperation of the limiting protrusion and the limiting groove on the bracket ensures the rear axle of the synchronous wheel set and the winding assembly along the axis of the transmission shaft. The lines are arranged in the direction of extension to avoid misalignment between each other for easy installation.

DRAWINGS

Figure 1 is a front elevational view showing the curtain of the first embodiment of the present invention after being opened;

Figure 2 is a side view showing the curtain of the first embodiment of the present invention after being opened;

Figure 3 is a front elevational view showing the curtain of the first embodiment of the present invention after being wound up;

Figure 4 is a side view showing the curtain of the first embodiment of the present invention after winding;

Figure 5 is a schematic view of a retracting device according to Embodiment 1 of the present invention;

Figure 6 is a cross-sectional view of the retracting device of Figure 5;

Figure 7 is an exploded perspective view of the winding assembly of Embodiment 1 of the present invention;

8 and 9 are schematic views of two perspectives of a synchronous wheel set according to Embodiment 1 of the present invention;

10-13 are schematic views of other synchronous wheel sets of the present invention;

Figure 14 is a schematic view of a retracting device of Embodiment 2 of the present invention;

Figure 15 is a schematic view of a retracting device of Embodiment 3 of the present invention.

In the above figures,

100, curtain body; 200, drawstring; 300, bracket; 301, mounting groove; 400, mounting seat; 401, limiting protrusion;

1. Synchronous wheel set; 11, synchronous wheel; 12, coil spring; 13, gear teeth;

2. Transmission component; 21, cylindrical gear; 22, first bevel gear; 23, second bevel gear;

3, winding assembly; 31, fixed seat; 310, threading hole; 311, wire hole; 312, limiting protrusion; 32, winding shaft; 33, transmission shaft.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which the advantages and features of the invention can be more readily understood by those skilled in the art.

Example 1

1-8 illustrate a retractable window covering of the present invention, in particular a retractable roman shade. Referring to Figures 1-8, the retractable curtain comprises a curtain body 100, a cord 200 for driving the curtain body 100, and a retracting device for retracting the curtain cord 200. The drawstring 200 is disposed in the curtain body 100, and the lower end of the drawstring 200 is fixedly coupled to the lower end of the curtain 100, and the upper end portion is fixedly coupled to the retracting device. The upper end of the curtain body 100 has a horizontally extending bracket 300, and the retracting device comprises a mounting seat 400 mounted on the bracket 300, a synchronous wheel set 1, a transmission assembly 2 and a winding assembly 3, and the left and right sides of each synchronous wheel set 1 are respectively A transmission assembly 2 is connected for changing the direction of the drive, and each of the winding assemblies 3 is connected via a transmission assembly 2 and at least one synchronous wheel set 1, respectively. The retractable device has the following three settings:

A, the synchronous wheel set 1 is one, the transmission component 2 on the left side of the synchronous wheel set 1 is connected with one winding assembly 3, and the transmission component 2 on the right side of the synchronous wheel set 1 is connected with the other winding assembly 3, this embodiment For example, adopt mode A, see Figures 1-6;

B. The synchronous wheel set 1 is one, and the transmission component 2 on the left side and/or the right side of the synchronous wheel set 1 is connected to at least two winding assemblies 3;

C. There are a plurality of synchronous wheel sets 1 and a plurality of winding assembly 3, and the transmission components 2 on the left and right sides of each synchronous wheel set 1 are respectively connected with at least one winding assembly 3, wherein two adjacent synchronous wheel sets are connected. There is at least one winding assembly 3 between 1.

The synchronizing wheel set 1 includes at least one coil spring 12 and at least two synchronizing wheels 11, and the synchronizing wheel 11 is rotatably disposed on the mount 400. Both ends of each of the coil springs 12 are fixedly coupled to the two synchronizing wheels 11 to be wound around the two synchronizing wheels 11 and the winding directions on the two synchronizing wheels 11 are opposite. Each of the transmission assemblies 2 includes a first bevel gear 22 and a second bevel gear 23 that mesh with each other, and the first bevel gears 22 of the two transmission assemblies 2 on both sides of the synchronous wheel set 1 are connected to at least one synchronous wheel 11, wherein A bevel gear 22 and a second bevel gear 23 are rotatably disposed on the mount 400, respectively, and the rotational axis of the first bevel gear 22 and the rotational axis of the second bevel gear 23 are perpendicular to each other. Referring to FIG. 7, each of the winding assemblies 3 includes a fixing base 31 fixedly disposed at an upper end of the curtain body 100, a winding shaft 32 rotatably provided on the fixing base 31, and a transmission shaft 33, a transmission shaft 33 and a corresponding second portion. The bevel gears 23 are connected, the bobbin 32 and the transmission shaft 33 are connected and coaxial, and the outer wall of the bobbin 32 extends obliquely outward along the axis line of the transmission shaft 33, and the upper end of the cable 200 is fixedly connected to An end of the bobbin 32 having a smaller outer diameter is provided with a threaded hole 310 through which the drawstring 200 passes, corresponding to a larger outer diameter of the bobbin 32. However, in the above mode B, if there are a plurality of winding assemblies 3 on the same side of the synchronous wheel 11, the transmission shafts 3 of the three winding assemblies 3 may be the same axis, or may be three axes connected in sequence.

5 and 6, the rotation axis line of the synchronous wheel 11 and the axis line of the transmission shaft 33 are perpendicular to each other, and the axis line of the transmission shaft 33 extends in the left-right direction. Specifically, in the present embodiment, the rotation axis line of the synchronous wheel 11 and the axis line of the transmission shaft 33 are both horizontal, and the rotation axis line of the synchronous wheel 11 extends in the front-rear direction.

Referring to FIG. 7, the fixing base 31 is further provided with a plurality of wire holes 311 respectively located at different positions of the fixing base. The threading holes 310 are located between the guiding holes 311 and the outer wall of the winding shaft 32, and the upper end portions of the cable 200 are sequentially Since one of the wire holes 311 and the threading hole 310 passes through and is connected to one end portion of the bobbin 32 having a smaller outer diameter, the drawstring 200 has different tension when worn through different wire holes 311, and can be adjusted according to the weight of the curtain body. The tension of the rope 200.

The transmission shaft 33 has a polygonal cross section, specifically a regular hexagon, and the bobbin 32 has a hole matching the regular hexagon, and the bobbin 32 is sleeved on the transmission shaft 33. A hole matching the regular hexagon is also formed on the second bevel gear 23, and one end of the bobbin 32 is inserted into the hole of the second bevel gear 23, the second bevel gear 23, the transmission shaft 33, and the bobbin 32 coaxial.

The synchronizing wheel 11 and the coil spring 12 have various combinations, such as:

Referring to Figures 8 and 9, there are two synchronous wheels 11, and the outer wall of the synchronous wheel 11 is provided with a ring of teeth 13, which are meshed with each other by the teeth 13, and a coil spring 12 is wound around the two. On the synchronous wheel 11, two synchronous wheels 11 are respectively connected to the two first bevel gears 22;

Referring to FIG. 10, the synchronous wheels 11 are two groups, and each set of synchronous wheels 11 includes two synchronous wheels 11, and the two synchronous wheels 11 of each set of synchronous wheels 11 are coaxial and arranged along their axis lines, and each group of synchronous wheels The outer wall of at least one of the synchronous wheels 11 is provided with a ring of teeth 13, and the two sets of synchronous wheels 11 are meshed with each other by the teeth 13, and one of the two sets of synchronous wheels 11 has a synchronous wheel 11 and two of the first coil springs 12, respectively. The ends are connected, and the first coil spring 12 is wound around the two synchronous wheels 11, and the two ends of the second coil spring 12 are fixedly connected to the other synchronous wheels 11 of the two sets of synchronous wheels 11, respectively, and can be rolled. Wrap around the two synchronous wheels 11, the first bevel gear 22 on the left side is connected to one of the synchronous wheels 11 of the left set of synchronous wheels 11, and the first bevel gear 22 on the right side and the right set of synchronous wheels One of the synchronous wheels 11 of 11 is connected;

Referring to Figure 11, the synchronizing wheels 11 are three, and the outer walls of the three synchronizing wheels 11 are provided with a ring of teeth 13, which are sequentially engaged by the teeth 13, the leftmost synchronous wheel 11 and the left side. The first bevel gear 22 is correspondingly connected, the rightmost synchronous wheel 11 and the right first bevel gear 22 are correspondingly connected, and the coil spring 12 is two, and one end of one coil spring 12 is fixedly connected to the middle. The synchronous wheel 11 and the synchronous wheel 11 on the left side, the two ends of the other coil spring 12 are fixedly connected to the intermediate synchronous wheel 11 and the right synchronous wheel 11, respectively, and the two coil springs 12 are stacked on the intermediate synchronous wheel 11 Winding

Referring to FIG. 12, the synchronous wheels 11 are three groups, and each set of synchronous wheels 11 includes two synchronous wheels 11, and the two synchronous wheels 11 of each set of synchronous wheels 11 are coaxial and arranged along their axis lines, and each group of synchronous wheels At least one of the synchronous wheels 11 is provided with gear teeth 13, and the three sets of synchronous wheels 11 are meshed with each other by the teeth 13, and four coil springs 12 are wound around the three sets of synchronous wheels 11, and the winding manner is the same as that shown in FIG. The way;

Referring to Figure 13, the difference from the manner shown in Figure 12 is that three coil springs 12 are wound around the three sets of synchronous wheels 11, respectively, on the two synchronous wheels 11 of the two sets of synchronous wheels 11, respectively. There is no winding coil spring 12; the above several methods can be applied to curtains of different weights by adjusting the number of synchronous wheels or the number of coil springs, that is, the weight of the curtain body can be adjusted.

The timing wheel 11 and the first bevel gear 22 are different shafts, and the rotation axis line of the synchronization wheel 11 and the axis line of the first bevel gear are parallel to each other, and the synchronization wheel 11 and the first bevel gear 22 are connected by the spur gear 21. Specifically, the synchronous wheel 11 is in mesh with the spur gear 22, and the spur gear 21 is coaxial with the first bevel gear 22. Specifically, in the embodiment, the spur gear 21 and the first bevel gear 22 are integrally injection molded or One-piece casting. In the present embodiment, the first bevel gear 22 and the second bevel gear 23 are both 90-degree bevel gears.

Referring to Figures 6, 7, and 9, the upper surface of the bracket 300 is provided with a mounting slot 301 extending in the left-right direction of the window covering. The mounting slot 301 is a rectangular slot, and the lower surface of the mounting bracket 400 has a matching width of the mounting slot 301. The limiting protrusion 401, the lower surface of the fixing base 31 also has a limiting protrusion 312 that cooperates with the width of the mounting groove 301. The mounting base 400 and the fixing base 31 are fixedly connected to the bracket 300 by screws, and each limiting convex The 401, 312 are just caught in the mounting groove 301, so that after installation, all of the mounting base 400 and the fixing base 31 are linearly arranged along the center line of the mounting groove 301 to prevent the transmission shaft 33 and the transmission assembly 2 from being offset.

The working process of the retractable curtain is as follows: the curtain 100 is pulled down, the cable 200 is unwound, the winding shaft 32 is rotated, the transmission shaft 33 is rotated, and the transmission direction is converted by 90 degrees through the transmission assembly 2, and the synchronous wheel 11 is rotated. After the rotation, the coil spring 12 is gradually unwound from one of the synchronous wheels 11 and wound onto the two synchronous wheels 11, and the deformation has an elastic force. Since the elastic force is insufficient to overcome the gravity of the curtain 100 itself, the curtain body 100 is rotated. In the open position, as shown in Figures 1, 2.

Lifting or pushing the curtain body 100 upwards, that is, applying a small thrust to the curtain body 100, the combined force of the thrust force and the spring force of the coil spring 12 is sufficient to overcome the gravity of the curtain body 100, the coil spring 12 is reset, and the synchronous wheel 11 is reversely rotated. The bobbin 32 is rotated to wind the drawstring 200, and the curtain 100 is wound up, as shown in Figures 3 and 4.

Since the outer wall of the bobbin 32 is a beveled surface, the windings first wound on the bobbin 32 are sequentially pushed forward by the rewinding bobbin, and the single layer is wound, so that the lamination of the drawstring 200 is avoided. The winding or knotting is smooth and retractable; and the transmission direction is changed by the transmission component 2, so that the layout of the retracting device is reasonable and the structure is compact.

Example 2

Referring to Figure 14, the present embodiment differs from Embodiment 1 only in that the axis of rotation of the synchronizing wheel 11 is vertical, i.e., extends in the up and down direction.

Example 3

Referring to FIG. 15, the difference between this embodiment and the first embodiment is that the retracting device is set in the above manner C, that is, there are a plurality of synchronizing wheel sets 1, and a plurality of winding components 3, each of which is synchronous. The transmission assemblies 2 on the left and right sides of the group 1 are respectively connected to at least one winding assembly 3, wherein one or more winding assemblies 3 are arranged between two adjacent synchronous wheel groups 1. Specifically, in the present embodiment, each of the left and right sides of each of the synchronous wheel sets 1 is provided with a winding assembly 3, wherein the drive shaft 33 of the winding assembly 3 between the opposite transmission assemblies 2 of the two synchronous wheel sets 1 Both ends are connected to the second bevel gears 23 of the two transmission assemblies 2, respectively.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and are a preferred embodiment for those skilled in the art to understand the contents of the present invention and to implement the present invention. protected range. Equivalent transformations or modifications made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

Claims (8)

A retractable curtain comprising a bracket for mounting a curtain body, a retracting device for retracting the curtain cord, the retracting device comprising at least one synchronizing wheel set, at least two winding assemblies; The synchronous wheel set includes at least one coil spring, at least two synchronous wheels rotatably disposed on the mounting seat, and two ends of each of the coil springs are fixedly coupled to the two synchronous wheels to be wound on the two synchronous wheels. The winding directions on the two synchronous wheels are opposite; each of the winding assemblies includes a fixing base, a winding shaft rotatably disposed on the fixing seat, and a transmission shaft, and the transmission shaft and the at least one synchronous wheel are directly Connected or connected by a transmission assembly, the winding shaft is disposed through the transmission shaft and coaxial, and the axis of the transmission shaft of each winding assembly extends in the same direction, and is characterized in that: the mounting seat and the The fixing group is fixedly connected to the bracket, and the bracket is provided with a finite slot, and the center line of the limiting slot and the center line of the transmission shaft extend in the same direction, and the mounting seat and the fixing seat are Separately opened and described The limiting protrusions are matched with the limiting protrusions, and each of the limiting protrusions is disposed in the limiting slot. The retractable curtain according to claim 1, wherein said retracting means comprises a synchronous wheel set, and a transmission assembly on both sides of said synchronous wheel set for changing a transmission direction, each side The transmission assembly is coupled to one of the winding assemblies; each of the transmission assemblies includes a first bevel gear and a second bevel gear that mesh with each other, and the first bevel gear and at least one of the two transmission assemblies The synchronous wheels are connected; the drive shaft of each of the winding assemblies and the corresponding second bevel gear are connected. The retractable curtain according to claim 1, wherein the retracting device comprises a synchronous wheel set, a transmission component on both sides of the synchronous wheel set for changing a transmission direction, and two The winding assembly to which the side transmission assembly is coupled, the transmission assembly on the one side is coupled to at least two of the winding assemblies; each of the transmission assemblies includes a first bevel gear and a second meshing with each other a bevel gear, the first bevel gears of the two transmission assemblies are coupled to at least one of the synchronous wheels; the drive shaft of each of the winding assemblies and the corresponding second bevel gear are connected, the same The side drive shaft is coaxial. The retractable curtain according to claim 1, wherein the retracting device comprises a plurality of the synchronous wheel sets and a plurality of the winding assemblies, and two sides of each of the synchronous wheel sets are respectively provided with useful And at least one of the winding assemblies of each of the synchronous wheel sets is connected to the transmission assembly for changing the direction of the transmission; each of the transmission assemblies respectively includes a first bevel gear and a second cone that mesh with each other a gear, the first bevel gears of the two transmission assemblies are coupled to at least one of the synchronization wheels; each of the winding assemblies includes a fixing base, a winding shaft rotatably disposed on the fixing base, and a drive shaft, the drive shaft and the corresponding second bevel gear are connected. The retractable curtain according to claim 1, wherein a rotation axis line of the synchronous wheel and an axis line of the transmission shaft extend in different directions. The retractable curtain according to claim 5, wherein the rotation axis line of the synchronous wheel and the axis line of the transmission shaft are perpendicular to each other. The retractable curtain according to claim 1, wherein an outer wall of the bobbin extends obliquely outward along an axial line of the transmission shaft, and the fixing seat corresponds to the bobbin A threaded hole for the passage of the drawstring is opened at one end of the larger outer diameter, and the drawstring is connected to the smaller outer end of the spool. The retractable curtain according to claim 1, wherein the fixing seat is provided with a threading hole and a wire hole, and the wire hole is formed in a plurality of positions at different positions of the fixing seat, the threading A hole is located between an outer wall of the bobbin and a plurality of the wire holes.