TWI863651B - Madane one-way damping mechanism for ropeless curtains - Google Patents

Abstract

The present invention provides a one-way damping mechanism in a motor of a rope-free curtain. The rope-free curtain comprises an upper beam, a lower beam, and a plurality of blades connected in series between the upper beam and the lower beam by a plurality of retractable belts. The motor is arranged inside the lower beam and connected to the retractable belt. The motor can control the release and retraction of the retractable belt to make the lower beam horizontal. The retractable belt can be retracted and the lower beam can be stopped at any position by using elastic force. The one-way damping mechanism is arranged inside the motor to enhance the braking force of the motor.

Description

Madane one-way damping mechanism for rope-free curtains

The present invention relates to a ropeless curtain, and more specifically, to a one-way damping mechanism of a motor inside a ropeless curtain.

According to the structure, the known curtains can be divided into two types: drawstring curtains and non-drawstring curtains. For the drawstring curtains, a drawstring on the outside of the curtain is mainly used to pull the curtain to open or close the curtain; in contrast, the non-drawstring curtain uses manpower to push up or press down the lower beam of the curtain to open or close the curtain.

Generally speaking, the ropeless curtain is usually wound up or released by a wire-retracting device in the upper beam, and the lower beam can rise or fall with the winding or releasing of the winding or releasing belts. Usually, the movement of the lower beam is controlled by the user pushing up or pulling down the lower beam with both hands. However, under normal operation, due to human error or uneven winding of the retractable belts in the take-up device, the lower beam may be slightly tilted and non-horizontal when it stops rising and falling. As the stop position of the lower beam is closer to the upper beam, the non-horizontal state of the lower beam becomes more unsightly. In order to allow the curtain to be folded smoothly, the user often needs to pull down the lower beam again and then push it up again to adjust the horizontality of the lower beam, which is not only inconvenient but also time-consuming and labor-intensive.

To this end, it is known that many companies have developed technologies that can maintain the horizontality of the lower beam. Most of them are to set friction elements or mechanisms in the take-up device of the upper beam to control the retraction and release of the retractable belt to maintain the horizontality of the lower beam and prevent the curtain from sliding down at the highest point or rebounding at the lowest point. Although these technologies can indeed solve the above problems, the take-up device that controls the retractable belt is set on the upper beam and has not changed much over the years. In addition, the effect of using friction to control the movement of the retractable belt is not stable and there is still room for improvement.

Based on this, the inventor has developed the invention application No. 112124723 of the Republic of China. As shown in the first and second figures, the invention mainly comprises a retractable belt box 2 for retracting each retractable belt 1 being arranged in the lower beam 3, and a motor 4 connected to each retractable belt box 2 is arranged in the lower beam 3, so that the retractable belts 1 can be retracted and released by the motor 4 at the same time, so that the lower beam 3 can maintain a horizontal state at any time and can stay at any position, thereby replacing the conventional take-up device of the upper beam 5. Specifically, the motor 4 is used to control the retractable belt 1. 4 is composed of a base 6, a first rope drum 7, a second rope drum 8, a spring mechanism 9, a connecting rope 10 and other components. The base 6 is fixedly mounted on the inner top side of the lower beam 3, and a rotating shaft 11 and a connecting shaft 12 are mounted on the base 6 in parallel. The two ends of the rotating shaft 11 are connected to a reel 13 inside the two retractable tape boxes 2. Each reel 13 is used to reel in the retractable tape 1. The first rope drum 7 and the second rope drum 8 are in the shape of cones, and a rope groove 14 is provided on the surface of the first rope drum 7 and the second rope drum 8. When the drum 7 rotates, the reel 13 can reel in or release the reel 1. The spring mechanism 9 is connected to one end of the first rope drum 7 and the second rope drum 8, and includes a first roller 15, a second roller 16 and an elastic member 17. The first roller 15 and the second roller 16 are arranged at one end of the shaft 11 and the connecting shaft 12. The elastic member 17 is a spiral spring with opposite winding directions at both ends. The two ends are connected to the first roller 15 and the second roller 16, and can be applied to make the first roller The elastic force of the reverse rotation of the first roller 15 and the second roller 16 causes the rotating shaft 11 and the connecting shaft 12 to rotate reversely. The two ends of the connecting rope 10 are connected to different ends of the first rope drum 7 and the second rope drum 8 (one end is connected to the large diameter end 18 of the first rope drum 7, and the other end is rolled up in the rope groove 14 and then extends from the small diameter end to the large diameter end 19 of the second rope drum 8), and can be entangled in the rope groove 14 of the first rope drum 7 or the second rope drum 8 when the first rope drum 7 and the second rope drum 8 rotate reversely. Based on this, the motor 4 can control the rotation of the first rope 7 and the second rope 8 through the elastic force of the elastic member 17 and the torque change of the connecting rope 10 on the first rope 7 and the second rope 8 (the radius change of the connecting rope 10 at different positions of the first rope 7 and the second rope 8 causes the torque to change accordingly), thereby providing the retracting and extending power of each retracting and extending belt 1, and allowing the lower beam 3 to stay at any position.

Although the technology disclosed in the aforementioned invention application can indeed keep the lower beam horizontal at any time and stay in any position, the bearing capacity of the lower beam when the curtain is fully retracted and fully extended is very different. After many tests and actual operations, the elastic parts of the motor have to cope with such different bearing capacities. The load is very high in the long run. Its material properties and durability must meet the requirements and must be specially manufactured, which will result in a higher manufacturing cost for the ropeless curtain.

The main purpose of the present invention is to provide a one-way damping mechanism for a rope-free curtain with a motor, which can solve the problem of the large difference in the bearing capacity of the lower beam when the curtain is fully retracted and fully extended, and has more practical value.

Therefore, in order to achieve the above-mentioned purpose, the present invention provides a one-way damping mechanism in a motor of a rope-free curtain. The rope-free curtain comprises an upper beam, a lower beam, and a plurality of blades connected in series between the upper beam and the lower beam by a plurality of retractable belts. The motor is arranged inside the lower beam and connected to the retractable belt, and can control the release and retraction of the retractable belt to make the lower beam horizontal. The elastic force is used to provide the retraction and retraction of the retractable belt and allow the lower beam to stay at any position. The one-way damping mechanism is arranged in the motor to enhance the braking force of the motor.

Preferably, the motor comprises a first rope drum, a second rope drum, a spring mechanism and a connecting rope. The surfaces of the first rope drum and the second rope drum are respectively provided with a rope groove in a spiral manner. The first rope drum is connected to the receiving and releasing belt and can reel in or release the receiving and releasing belt when rotating. The spring mechanism is connected to one opposite end of the first rope drum and the second rope drum and can provide elastic force for the first rope drum and the second rope drum to rotate in opposite directions. The two ends of the connecting rope are connected to The first rope and the second rope are at different ends, and can be wound around the rope groove of the first rope or the second rope when the first rope and the second rope rotate in opposite directions. The one-way damping mechanism is used to increase the damping force of the motor and prevent the lower beam from sliding down. It includes a clutch device and a torsion spring. The clutch device is provided at one end of the second rope connecting the spring mechanism. One end of the torsion spring is tightened on the clutch device, and the other end is connected to the motor.

Preferably, the motor further comprises a base, which is fixed inside the lower beam, the first rope drum is sleeved on a rotating shaft and mounted on the base, the second rope drum is sleeved on a connecting shaft and mounted on the base and parallel to the first rope drum, the connecting shaft is connected to the receiving belt, the clutch device comprises a sleeve and a plurality of clutch steel balls, the sleeve is sleeved on the connecting shaft and located inside the second rope drum, the clutch steel ball is between a concave hole provided inside the second rope drum and a slide groove provided at one end of the sleeve, and can move along the slide groove, one end of the torsion spring is tightened to the other end of the sleeve, and the other end is connected to the base.

Preferably, the first rope drum and the second rope drum are cone-shaped, each including a large diameter end and a small diameter end. The first rope drum and the second rope drum are arranged alternately with the large diameter end and the small diameter end facing each other, and the clutch device is arranged at the large diameter end of the second rope drum.

Preferably, a slot is recessed on the base, and the other end of the torsion spring is inserted into the slot.

Preferably, the spring mechanism is disposed on the base, and includes a first roller and a second roller, the first roller and the second roller are respectively connected to one end of the rotating shaft and the connecting shaft, and an elastic member, the two ends of which are connected to the first roller and the second roller, and can exert an elastic force to make the first roller and the second roller rotate in opposite directions, so as to cause the rotating shaft and the connecting shaft to rotate in opposite directions, and the one-way damping mechanism corresponds to the first roller.

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

Preferably, the slide groove is wavy and surrounds one end of the sleeve.

Preferably, the other end of the torsion spring inserted into the slot is in a bent shape.

The present invention:

22: Clutch device

24: Torsion spring

26: Bushing

28: Clutch ball

30: Concave hole

32: Chute

34: Slot

Usage:

1: Retractable belt

2: Retract and place the tape box

3: Lower beam

4: Motor

5: Upper beam

6: Base

7: First rope reel

8: Second rope drum

9: Spring mechanism

10: Connecting rope

11: Rotating axis

12: Connecting shaft

13: Reel

14: Rope trough

15: First roller

16: Second roller

17: Elastic parts

18, 19: Large diameter end

20: Leaves

The first figure is a partially exploded schematic diagram of a known non-cord curtain.

The second picture is a 3D exploded view of the motor in the ropeless curtain.

The third figure is a three-dimensional combination diagram of a preferred embodiment of the present invention and a motor.

The fourth figure is a schematic diagram of the interior of the large diameter end of the second rope drum in a preferred embodiment of the present invention.

The fifth figure is a schematic diagram of the motor base in a preferred embodiment of the present invention.

Figure 6 is a schematic diagram of a preferred embodiment of the present invention, in which the second rope drum and the shaft sleeve rotate in a direction opposite to the first rope drum.

Figure 7 is a schematic diagram of the second rope drum and the shaft sleeve rotating toward the first rope drum in a preferred embodiment of the present invention.

Below, a preferred embodiment of the present invention is given, and further detailed description is given with the help of drawings as follows:

As shown in the first and second figures, the drawstring-free curtain comprises an upper beam 5 and a lower beam 3 in parallel, a plurality of blades 20, which are connected by two retractable belts 1 and are located between the upper beam 5 and the lower beam 3. The motor 4 is arranged inside the lower beam 3 and connected to two retractable belt boxes 2 for retracting the two retractable belts 1, so as to control the retraction of the two retractable belts 1, so that the lower beam 3 can be in a horizontal state, and the elastic force is used to provide the retraction of each retractable belt 1 and the lower beam 3 can stay at any position. The one-way damping mechanism of a preferred embodiment of the present invention is arranged on the motor. 4, used to increase the braking force of the motor 4 and prevent the lower beam 3 from sliding down; the aforementioned upper beam 5, lower beam 3, blade 20, retractable belt 1, motor 4 and retractable belt box 2 are all the same as the components of the known ropeless curtain, and all belong to the known technology. The detailed structure and operation of each component will not be described here (of course, the structure related to the motor 4 and the one-way damping mechanism is not known, as described later); the characteristics of the present invention are: As shown in Figures 3 to 6, the one-way damping mechanism includes a clutch device 22 and a torsion spring 24. The clutch device 22 includes a sleeve 26 and two clutch balls 28. The sleeve 26 is sleeved on the connecting shaft 12 and located inside the large diameter end 19 of the second rope drum 8 and corresponds to a spring mechanism 9. Each clutch ball 28 is between two recessed holes 30 provided inside the second rope drum 8 and a wave-shaped slide groove 32 surrounded by one end of the sleeve 26, and can move along the slide groove 32. One end of the torsion spring 24 is tightened on the sleeve 26, and the other end is inserted into a slot 34 recessed on the base 6 in a bent shape.

Thus, when the user pushes the lower beam 3 upward to retract the ropeless curtain, the torsion spring 24 and the shaft sleeve 26 are both in a fixed state, and the motor 4 drives the second rope drum 8 (through the second roller 16 and the connecting shaft 12) to rotate in the direction opposite to the first rope drum 7 under the elastic force of the elastic member 17, and the concave holes 30 in the second rope drum 8 can drive the clutch steel ball 28 to slide in the slide groove 32 of the shaft sleeve 26, so that the shaft sleeve 26 has a tendency to rotate in the direction opposite to the first rope drum 7, as shown in the sixth figure, and then the lower beam 3 can be smoothly pushed against the upper beam to retract the ropeless curtain.

Secondly, in the absence of external force and the hand not pulling the lower beam 3, the drawstring curtain has a tendency to unfold under the action of its own weight, which will drive the second rope drum 8 to rotate toward the first rope drum 7, as shown in Figure 7, and then the second rope drum 8 will drive the clutch steel ball 28 to move and cause the shaft sleeve 26 to rotate toward the first rope drum 7. However, these trends cannot overcome the tightening force of the torsion spring 24 and the surface of the shaft sleeve 26 and the rotation force of the elastic member 17. Therefore, the drawstring curtain will be in a static state and the lower beam 3 will not slide down.

On the contrary, when there is an external force and the lower beam 3 is pulled by hand, as long as the pulling force overcomes the tightening force of the torsion spring 24 and the surface of the shaft sleeve 26 and the rotational force of the elastic member 17, the no-string curtain can be smoothly unfolded. When letting go, the lower beam 3 is in the aforementioned situation where there is no external force, and the curtain will immediately be in a stopped state, and the lower beam 3 can be fixed at any position.

In summary, the present invention can effectively solve the problem of the huge difference in the bearing capacity of the lower beam when the drawstring curtain is fully folded and fully unfolded through the cooperation of the one-way damping mechanism and the motor, so that the lower beam will not slide down and can be fixed at any position, and there is no need to specially manufacture the elastic parts of the motor, which can reduce the manufacturing cost of the drawstring curtain and make it more practical.

The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Anyone with common knowledge in the relevant technical field may make some modifications, changes and embellishments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of the attached patent application.

22: Clutch device

24: Torsion spring

26: Bushing

28: Clutch ball

32: Chute

Claims (8)

A motor-internal one-way damping mechanism for a rope-free window curtain, the rope-free window curtain comprising an upper beam, a lower beam and a plurality of blades connected in series between the upper beam and the lower beam by a plurality of retractable belts, the motor being arranged inside the lower beam and connected to the retractable belt, being able to control the release and retraction of the retractable belt so that the lower beam is in a horizontal state, and utilizing elastic force to provide the retraction and retraction of the retractable belt and to enable the lower beam to stay at any position, the motor comprising a first rope drum, a second rope drum, a spring mechanism and a connecting rope, the surfaces of the first rope drum and the second rope drum being respectively spirally provided with a rope groove, the first rope drum being connected to the retractable belt and being able to retract or release the retractable belt when rotating, the spring mechanism The spring mechanism is connected to one of the opposite ends of the first rope and the second rope, and can provide elastic force for the first rope and the second rope to rotate in the opposite direction. The two ends of the connecting rope are connected to different ends of the first rope and the second rope, and can be wound around the rope groove of the first rope or the second rope when the first rope and the second rope rotate in the opposite direction. The one-way damping mechanism is arranged in the motor to enhance the braking force and damping force of the motor and prevent the lower beam from sliding down. It includes a clutch device and a torsion spring. The clutch device is arranged at one end of the second rope connected to the spring mechanism. One end of the torsion spring is tightened to the clutch device, and the other end is connected to the motor. The one-way damping mechanism in the motor of the rope-free window curtain as described in claim 1, wherein the motor further comprises a base, the base is fixedly mounted inside the lower beam, the first rope drum is sleeved on a rotating shaft and mounted on the base, the second rope drum is sleeved on a connecting shaft and mounted on the base and parallel to the first rope drum, the connecting shaft is connected to the retractable belt, the The coupling device includes a sleeve and a plurality of clutch steel balls. The sleeve is sleeved on the connecting shaft and located inside the second rope drum. The clutch steel balls are located between a recessed hole provided inside the second rope drum and a slide groove provided at one end of the sleeve and can move along the slide groove. One end of the torsion spring is tightened to the other end of the sleeve and the other end is connected to the base. The motor-type one-way damping mechanism of the rope-free window curtain as described in claim 1, wherein the first rope drum and the second rope drum are conical, each including a large diameter end and a small diameter end, the first rope drum and the second rope drum are arranged alternately in such a way that the large diameter end and the small diameter end are opposite to each other, and the clutch device is arranged at the large diameter end of the second rope drum. As described in claim 2, the motor inner one-way damping mechanism of the rope-free window curtain, wherein a slot is recessed on the base, and the other end of the torsion spring is inserted into the slot. The one-way damping mechanism of the motor inner of the ropeless window curtain as described in claim 2, wherein the spring mechanism is arranged on the base, and comprises a first roller and a second roller, wherein the first roller and the second roller are respectively connected to one end of the rotating shaft and the connecting shaft, and an elastic member, the two ends of which are connected to the first roller and the second roller, and can exert an elastic force to make the first roller and the second roller rotate in opposite directions relative to each other, thereby causing the rotating shaft and the connecting shaft to rotate in opposite directions, and the one-way damping mechanism corresponds to the first roller. The one-way damping mechanism of the motor inner of the ropeless window curtain as described in claim 5, wherein the elastic member is a spiral spring with opposite winding directions at both ends. The one-way damping mechanism of the motor inside the ropeless window curtain as described in claim 2, wherein the slide groove is wavy around one end of the sleeve. The motor inner one-way damping mechanism of the ropeless window curtain as described in claim 4, wherein the other end of the torsion spring inserted into the slot is bent.