TWM650686U - Retracting mechanism for cordless curtain - Google Patents

Abstract

This invention provides a retraction mechanism for cordless curtains. The retraction mechanism is arranged inside the lower beam and includes two retractable belt boxes, a rotating shaft and a driving braking device. The two retractable belt boxes are opposite to each other. The rotating shaft is disposed inside the lower beam and connected to the retractable belts respectively. The retractable belts can be rolled up or released. The rotating shaft is rotatably extended and installed in the lower beam and connected to the two retractable belt boxes to drive the two retractable belts. The retractable belt box synchronously retracts or releases the two retractable belts to raise or lower the lower beam. The driving and braking device includes a first and a second conical cylinder, a connecting rope and a spring motor. The rotating shaft system Passing through the axis center of the first conical cylinder, the first conical cylinder can be driven to rotate. The spring motor is connected to one end of the first and second conical cylinders and can exert a reverse elastic force on the first conical cylinder. The first and second cone-shaped tubes are used to provide power for retracting and retracting each blade and lifting and lowering the lower beam.

Description

Retractable and retractable mechanism for cordless curtains

This creation is related to cordless curtains, and more specifically, it refers to a retractable and retractable mechanism for cordless curtains.

According to the structure, conventional curtains can be divided into two types: cord-type curtains and cord-less curtains. As for cord-type curtains, a cord outside the curtain body is mainly used to pull the curtain. The curtain body is used to expand or close the curtain body; in contrast, cordless curtains use human power to push up or down the lower beam of the curtain to expand or close the curtain body.

Generally speaking, conventional cordless curtains use a take-up device installed in the upper beam to retract or release the cord (or retraction belt), so that the lower beam rises or falls relative to the upper beam. Usually, the movement of the lower beam is controlled by the user pushing up or pulling down the lower beam with both hands. However, even under normal operation, it is still possible that due to human operating deviation or the uneven winding of the stay rope in the take-up device, the lower beam will be slightly tilted when it stops lifting and not be in a completely horizontal state. As the stop position of the lower beam gets closer to the upper beam, this slight tilt of the lower beam becomes visually unsightly. Secondly, when the curtain body is completely closed, if the lower beam is slightly tilted, the user often needs to move it sharply again. Pull down the lower beam to a certain degree to release the pull cord self-retracting device, and then push up the lower beam again to adjust the level of the lower beam. This operation is inconvenient and time-consuming and labor-intensive.

For this reason, it is known that many manufacturers have developed related technologies that can maintain the level of the lower beam. Most of them install friction elements or mechanisms in the take-up device of the upper beam to control the movement of the pull rope to maintain the level of the lower beam. degree, and can prevent the curtain from sliding down at the highest point or rebounding at the lowest point. There are many related patents, such as US patents US9366077, US9482049 and US7228797, etc., which will not be detailed here.

Although the aforementioned patents and related technologies that can maintain the level of the lower beam can indeed solve the aforementioned problems, the take-up devices for controlling the pull rope are all located on the upper beam and have not changed much over the years. Moreover, friction is used to control the pull rope. The movement effect is not stable and there is still room for improvement.

The main purpose of this invention is to provide a cordless curtain retraction mechanism that can provide the power to retract and retract the curtain, and can keep the height of the left and right ends of the lower beam consistent at all times, without causing the problem of imbalance or tilt of the lower beam. , and when no pulling or force is applied to the lower beam, the lower beam can be positioned at the required position.

The reason is that, in order to achieve the aforementioned purpose, this invention provides a retractable and retractable mechanism for a cordless curtain. The cordless curtain includes an upper beam, a lower beam, and a plurality of blades between the upper beam and the lower beam. And pass through each of the blades to connect the two retractable belts of the upper beam and the lower beam. The retractable mechanism is arranged inside the lower beam and includes a number of retractable belt boxes, which are relatively arranged inside the lower beam and are respectively Each retractable belt is connected to be able to retract or release each retractable belt; a rotating shaft is rotatably extended in the lower beam and connected to two retractable belt boxes, and can drive the two retractable belt boxes to synchronize when rotated Retract or release the two retraction belts to raise or lower the lower beam; a plurality of driving braking devices include a first and a second conical cylinder, a connecting rope and a spring motor, and the rotating shaft passes through the first cone The axis of the conical cylinder can drive the first conical cylinder to rotate. The first and second conical cylinders are staggeredly installed in the lower beam. One end of the connecting rope is connected to one end of the first conical cylinder. The other end is rolled up and then extended to connect to one end of the second conical cylinder. The spring motor is connected to one end of the first and second conical cylinders and can apply reverse elastic force to the first and second conical cylinders. Two conical tubes are used to provide the power for retracting and unfolding each blade and lifting and lowering the lower beam.

Preferably, the two retractable belts are sheet-shaped belts, the two retractable belt boxes each include a runner, and each of the retractable belts is connected to each runner.

Preferably, the two retractable tape boxes each include a box body, and the two box systems are fixed inside the lower beam, and each of the runners is placed in each box body and connected in series by the rotating shaft.

Preferably, the extension direction of the rotating shaft is parallel to each blade and the upper and lower beams, and the axial direction of the first and second conical tubes is parallel to the opposite blades and the upper and lower beams.

Preferably, the driving and braking device further includes a connecting shaft that rotatably passes through the axis center of the second conical tube and is parallel to the rotating axis. The first and second conical tubes are installed in the lower beam, respectively. Contains a large diameter end and a small diameter ends, the first and second conical cylinders are arranged with large and small diameter ends facing each other, and the surfaces of the first and second conical cylinders are respectively spirally provided with a rope groove, and one end of the connecting rope is connected The other end of the large-diameter end of the first conical tube is rolled up in the rope groove and then extends from the small-diameter end to the large-diameter end of the second conical tube.

Preferably, the spring motor includes a first and a second roller, the first and second rollers are respectively connected to one end of the first and second cone-shaped cylinders, an elastic member, and the two ends are connected to the first and second conical cylinders. roller, and can exert an elastic force to reversely rotate the first and second rollers.

Preferably, the elastic member is a scroll spring leaf with two ends winding in opposite directions.

Preferably, the rotating shaft is connected to the first conical cylinder, and the first roller is sleeved on the rotating shaft without being connected to the rotating shaft. The elastic force at one end of the elastic member is transmitted to the first conical cylinder and the rotating shaft through the first roller. The second roller is connected to the connecting shaft, and the elastic force at the other end of the elastic member is transmitted to the connecting shaft and the second conical cylinder through the second roller.

Preferably, the driving braking device further includes a base, which is fixed on the top side of the inside of the lower beam, and the first and second conical tubes, spring motors, connecting shafts and rotating shafts are mounted on the base.

Preferably, the spring motor further includes a cover, which is provided on the base to cover the first and second rollers and the elastic member.

This creation:

10: Retracting and retracting mechanism

12:Retract and retract the tape box

14:Rotating axis

16: Drive braking device

22:Box body

24:Runner

26:Pedestal

28:Connecting shaft

30: First cone

32:Second conical cylinder

34:Connecting rope

36:Spring motor

38: Large diameter end

40: Trail end

41: Rope groove

42:First roller

44:Second roller

46: Elastic parts

48: cover slip

Idiom:

1: cordless curtains

2: Top beam

3: Lower beam

4: Blades

5:Retract and retract belt

The first picture is an appearance and partially exploded schematic diagram of a preferred embodiment of this invention.

The second figure is a bottom side and partially exploded perspective view of the retractable mechanism in a preferred embodiment of the present invention.

The third figure is a schematic diagram of the action of a preferred embodiment of this invention, showing the state of raising the lower beam.

The fourth picture shows the state of the retractable mechanism when the lower beam is raised in a preferred embodiment of this invention.

The fifth figure is a schematic diagram of the action of a preferred embodiment of this invention, showing the state of pulling down the lower beam.

The sixth figure shows the state of the retraction mechanism when the lower beam is lowered in a preferred embodiment of this invention.

Below, a preferred embodiment of the present invention is cited, and further detailed description is given with reference to the drawings: First, please refer to the first and second figures showing the cordless curtains of a preferred embodiment of the present invention. The retractable and retractable mechanism 10, the cordless curtain 1, includes a parallel upper beam 2 and a lower beam 3, and a plurality of blades 4, which are connected between the upper beam 2 and the lower beam 3 through the connection of the two retractable belts 5. The retraction mechanism 10 is connected to two retraction belts 5 for controlling the retraction and retraction of the two retraction belts 5 so that the lower beam 3 can be pulled up or down, as well as a plurality of ladder belts and other components; The upper beam 2, the lower beam 3, the plurality of blades 4, the two retractable and retractable belts 5 and the retractable and retractable mechanism 10 are all components of conventional cordless blinds. The structure and operation method of each of these components will not be described in detail here. The characteristic of this invention is that the retracting and retracting mechanism 10 is arranged inside the lower beam 3 and includes two retracting and retracting tape boxes 12, a rotating shaft 14 and a driving braking device 16.

The two retractable belt boxes 12 are arranged at two inner ends of the lower beam 3 and are respectively connected to the retractable belts 5. The two retractable belts 5 are metal sheet-shaped belts, but not limited to. The tape boxes 12 respectively include a box body 22 and a runner 24. Each box body 22 is fixed on the top side of the interior of the lower beam 3. Each of the runner 24 is pivotally mounted in each box body 22, and each of the boxes 22 should be received. The unwinding belts 5 are respectively connected to each of the wheels 24, so that when each of the rotating wheels 24 rotates, each of the retracting and unwinding belts 5 can be retracted or released.

The rotating shaft 14 is connected in series with the runner 24 of the two retractable belt boxes 12. When rotating, the runner 24 can be driven to retract or release the two retractable belts 5 synchronously to raise or lower the lower beam 3.

The driving braking device 16 is composed of a base 26, a connecting shaft 28, a first conical cylinder 30 and a second conical cylinder 32, a connecting rope 34 and a spring motor 36. The base 26 is fixed on the top side inside the lower beam 3 . The connecting shaft 28 is rotatably mounted on the base 26 and parallel to the rotating shaft 14 . The first cone-shaped cylinder 30 is pivoted on the base 26 by the rotating shaft 14 passing through its axis. The second cone-shaped cylinder 32 is pivoted on the base 26 by the connecting shaft 28 passing through its axis and is parallel to the base 26 . The first conical cylinder 30, and the first and second conical cylinders 30, 32 respectively have a large diameter end 38 and a small diameter end 40. The first and second conical cylinders 30, 32 are connected by a large diameter end. , small diameter ends 38, 40 are staggeredly arranged on the rotating shaft 14 and the connecting shaft 28 in a relatively opposite manner. In addition, the surfaces of the first and second conical cylinders 30, 32 are respectively spirally provided with a rope groove. 41. When the rotating shaft 14 rotates, it can drive the first conical cylinder 30 to rotate. One end of the connecting rope 34 is connected to the large-diameter end 38 of the first conical cylinder 30 , and the other end is rolled up in the rope groove 41 and then extended from the small-diameter end 40 to the large-diameter end 38 of the second conical cylinder 32 . . The spring motor 36 has a first roller 42 and a second roller 44, an elastic member 46 and a cover 48. The first and second rollers 42 and 44 are respectively sleeved on the rotating shaft 14 and the connecting shaft 28 and connected to the second roller. One end of the second conical cylinder 30 and 32 (one end of the first roller 42 is connected to the small diameter end 40 of the first conical cylinder 30, and one end of the second roller 44 is connected to the large diameter end 38 of the second conical cylinder 32 , and the first roller 42 is not connected to the rotating shaft 14, and the second roller 44 is connected to the connecting shaft 28). The elastic member 46 is a conventional scroll spring piece with two ends winding in opposite directions, and the two ends are respectively connected to the third 1. The second rollers 42 and 44 are used to impart elastic force to the first and second rollers 42 and 44 in reverse rotation, whereby the elastic force at one end of the elastic member 46 can be transmitted through the first roller 42 To the first cone-shaped cylinder 30 and the rotating shaft 14, the elastic force at the other end of the elastic member 46 can be transmitted to the connecting shaft 28 and the second cone-shaped cylinder 32 through the second roller 44 to provide the retractable, lowering, and lowering of each blade 4. The cover 48 is provided on the base 26 to cover the first and second rollers 42, 44 and the elastic member 46 due to the power of the beam lifting.

In this way, the retraction mechanism 10 of the cordless curtain of the present invention uses the elastic member 46 to provide the retraction power of the curtain, each retraction belt box 12 provides the storage and release of the retraction belt 5, and the rotating shaft 14 is a series of Connecting the axis center of the runner 24 and the first cone-shaped cylinder 30 of each retractable tape box 12, the axis center of each runner 24, the first cone-shaped cylinder 30 and the rotating shaft 14 can rotate synchronously, so that the lower position can be maintained at any time. The left and right ends of the beam 3 have the same height, and the lower beam 3 will not tilt due to being pulled down or pushed up.

Secondly, as shown in the third and fourth figures, when the cordless curtain 1 needs to be folded, the connecting ropes 34 in the driving braking device 16 are all wound around the first tapered cylinder 30. The other end of the groove 41 is connected to the large diameter end 38 of the second tapered cylinder 32 . When the lower beam 3 is pushed up by hand, each blade 4 is retracted. At this time, the second roller 44 can rotate under the spring power of the elastic member 46, and synchronously drives the connecting shaft 28 and the second conical cylinder 32 to rotate. The second cone-shaped cylinder 32 can gradually unwind the connecting rope 34 from the first cone-shaped cylinder 30, and then wind it around the rope groove 41 of the second cone-shaped cylinder 32, and can drive the first cone-shaped cylinder 30 to rotate. , and then synchronously drive the wheels 24 and the rotating shafts 14 of the retractable belt boxes 12 to rotate. Finally, the wheels 24 of the retractable belt boxes 12 roll up the retractable belt 5, and the cordless curtain 1 can be Put away.

Furthermore, as shown in the fifth and sixth figures, when the cordless curtain 1 needs to be unfolded, the connecting ropes 34 in the driving braking device 16 are all ropes wound around the second conical cylinder 32. The other end of the groove 41 is connected to the large diameter end 38 of the first tapered cylinder 30 . When the lower beam 3 is pulled down by hand, each retractable belt 5 is gradually pulled out of each retractable belt box 12, and each blade 4 also gradually unfolds, and at the same time, the wheel 24 of each retractable belt box 12 is prompted to rotate. Then, the rotating shaft 14 and the first conical cylinder 30 are driven to rotate synchronously, and the connecting rope 34 is driven to rotate the second conical cylinder 32. The connecting rope 34 is gradually released from the second conical cylinder 32 and wound around the first cone. on the rope groove 41 of the cone-shaped cylinder 30, and the rotation of the second cone-shaped cylinder 32 synchronously drives the connecting shaft 28 and the second roller 44 to rotate, so as to overcome the spring force of the elastic member 46 and roll the elastic member 46 in the second cone-shaped cylinder 30. By pressing the roller 44, the cordless curtain 1 can be pulled down.

In addition, when the user's hand releases the lower beam 3 or there is no external force acting on the lower beam 3, the lower beam 3 has a tendency to slide down or rise, and the elastic member 46 of the driving braking device 16 can maintain the force under the spring force. Balance to ensure that the lower beam 3 cannot rise or fall: when the lower beam 3 has a downward trend, the first conical tube 30 can drive the second conical tube 32 to rotate. At this time, the weight of each blade 4 is superimposed. The total weight of the upper and lower beams 3 and the retracting and retracting mechanism 10 can be prevented by the torsion moment of the connecting rope 34 on the second cone-shaped cylinder 32 being smaller than the torsion moment of the elastic member 46 on the second cone-shaped cylinder 32 through the connecting shaft 28. The lower beam 3 slides down. On the contrary, when the lower beam 3 has an upward trend, the second conical tube 32 drives the first conical tube 30 to rotate. At this time, the weight of each blade 4 is added to the total weight of the lower beam 3 and the retraction mechanism 10 Because the torsional moment of the rotating shaft 14 on the first conical tube 30 is greater than the torsional moment of the elastic member 46 on the second conical tube 32 through the connecting rope 34, the lower beam 3 can be prevented from rising.

Based on this, the tapered design of the first and second tapered tubes 30, 32 and the relative staggered arrangement of the large and small diameter ends 38, 40 have their own moments (the connecting rope 34 is in the first and second tapered tubes 30 , 32 The radius changes at different positions cause the moment to change accordingly) considerations and effects, and as long as the hand leaves the lower beam 3 or there is no external force acting on the lower beam 3, the lower beam 3 can stay at the required position.

In addition, in order to prevent the rotational force load of the elastic member 46 from being too high, a one-way damping mechanism (not shown in the figure) can also be added to the spring motor 36 to connect the second roller 44 of the spring motor 36. The one-way damping mechanism Mechanisms such as springs and clutch mechanisms, but not limited to, are used when there is no external force or pull cord. When the curtain 1 tends to expand due to its own weight, the second cone-shaped tube 32 tends to rotate toward the first cone-shaped tube 30, but it cannot overcome the rotational force and single force of the elastic member 46. The damping force is exerted to make the cordless curtain 1 in a balanced static state. When the lower beam 3 is pulled by hand, the rotation force and one-way damping force of the elastic member 46 are overcome, and the cordless curtain 1 can be smoothly unfolded. After letting go, the rotation force of the elastic member 46 is used. The one-way damping force causes the cordless curtain 1 to stop immediately, thereby better solving the problem of the huge difference in the load-bearing capacity of the lower beam 3 when the cordless curtain 1 is fully retracted and when it is fully deployed. The problem is to keep the curtain from sliding down under its own weight.

To sum up, the retractable and retractable mechanism of the cordless curtain provided by this invention can utilize the retractable and retractable belt boxes, the rotating shaft and the driving and braking device of the retracting and retracting mechanism in the lower beam. The elastic member provides the power to retract and unfold the curtain, and each retractable belt box provides the storage and release of the retractable belt. Moreover, the rotating shaft is connected in series with the runner axis of each retractable belt box and the structure of the first conical tube. , the axis center of each runner, the first cone-shaped tube and the rotating shaft can be rotated synchronously, not only the height of the left and right ends of the lower beam can be kept consistent at any time, but also when the lower beam is not pulled or no force is exerted on the lower beam, the lower beam It can be positioned at the required position, which is of great practical value. The reason is that this creation does meet the requirements for a new patent, and the application must be filed in accordance with the law.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can Slight modifications, changes, and embellishments may be made without departing from the spirit and scope of this invention. Therefore, the scope of protection of this invention shall be determined by the appended patent application scope.

10: Retracting and retracting mechanism

12:Retract and retract the tape box

14:Rotating axis

16: Drive braking device

1: cordless curtains

2: Top beam

3: Lower beam

4: Blades

5:Retract and retract belt

Claims (10)

A retraction mechanism for a cordless curtain. The cordless curtain includes an upper beam, a lower beam, a plurality of blades between the upper beam and the lower beam, and passes through each blade to connect the upper beam and the lower beam. 2. The retractable belt. The retractable mechanism is installed inside the lower beam and includes: A plurality of retractable belt boxes are relatively arranged inside the lower beam and are respectively connected to the retractable belts, and can retract or release the respective retractable belts; A rotating shaft is rotatably extended in the lower beam and connected to two retractable belt boxes. When rotating, the two retractable belt boxes can be driven to retract or release the two retractable belts simultaneously, so that the lower beam rises or falls; and A plurality of driving braking devices include a first and a second conical cylinder, a connecting rope and a spring motor. The rotating shaft passes through the axis center of the first conical cylinder and can drive the first conical cylinder to rotate. The first and second conical tubes are staggeredly installed in the lower beam. One end of the connecting rope is connected to one end of the first conical tube, and the other end is rolled up and extended to connect to one end of the second conical tube. , the spring motor is connected to one end of the first and second conical tubes, and can apply reverse elastic force to the first and second conical tubes to provide retraction and expansion of each blade and lifting and lowering of the lower beam. of motivation. The retractable and retractable mechanism for cordless curtains as described in claim 1, wherein the two retractable belts are sheet-shaped belts, the two retractable belt boxes respectively include a runner, and each of the retractable belts is connected to each wheel. The retractable and retractable mechanism for cordless curtains as described in claim 2, wherein the two retractable belt boxes each include a box body, the two box system is fixed inside the lower beam, and each of the runners is placed in each box. The body is connected in series with the rotating shaft. The retracting and retracting mechanism of cordless curtains as described in claim 1, wherein the extending direction of the rotating shaft is parallel to the blades and the upper beam and the lower beam, and the axial directions of the first and second conical tubes are parallel to each other. Blades and upper and lower beams. The retracting and retracting mechanism of cordless curtains as described in claim 4, wherein the driving and braking device further includes a connecting shaft that rotatably passes through the axis center of the second conical tube and is parallel to the rotating axis, and the first The first and second conical tubes are installed in the lower beam and respectively include a large diameter end and a small diameter end. The first and second tapered tubes are arranged in such a manner that the large and small diameter ends face each other, and the third A rope groove is spirally provided on the surface of the first and second conical cylinders respectively. One end of the connecting rope is connected to the large diameter end of the first conical cylinder, and the other end is rolled up in the rope groove and then extended from the small diameter end to the The large diameter end of the second conical tube. The retraction and retraction mechanism of cordless curtains as claimed in claim 5, wherein the spring motor includes a first and a second roller, and the first and second rollers are respectively connected to one end of the first and second conical tubes. , an elastic member, with two ends connected to the first and second rollers, and can exert an elastic force to cause the first and second rollers to rotate in reverse. The retracting and retracting mechanism for cordless curtains as described in claim 6, wherein the elastic member is a scroll spring leaf with two ends winding in opposite directions. The retracting and retracting mechanism of cordless curtains as described in claim 7, wherein the rotating shaft is connected to the first conical tube, the first roller is sleeved on the rotating shaft without being connected to the rotating shaft, and the elastic force at one end of the elastic member is The elastic force at the other end of the elastic member is transmitted to the connecting shaft and the second conical cylinder through the second roller. The retracting and retracting mechanism of cordless curtains as described in claim 8, In the invention, the driving braking device further includes a base, which is fixed on the top side of the inside of the lower beam, and the first and second conical tubes, spring motors, connecting shafts and rotating shafts are mounted on the base. The retracting and retracting mechanism of cordless curtains according to claim 9, wherein the spring motor further includes a cover that is provided on the base to cover the first and second rollers and the elastic member.