CN106032743A - Curtain body braking mechanism of curtain without pull rope - Google Patents

Abstract

A curtain body braking mechanism of a curtain without a pull rope mainly comprises two rope winding wheels, two one-way clutch units, two guide rods and two transmission ropes, wherein the one-way clutch units are adjacently arranged on the rope winding wheels and are provided with one-way clutch wheels, the guide rods are arranged on one sides of the rope winding wheels and are parallel to the axial direction of the rope winding wheels, the transmission ropes are spanned on the guide rods and surround the one-way clutch wheels, one ends of the transmission ropes are fixed on the rope winding wheels, and therefore the transmission ropes can be orderly wound on the rope winding wheels through the guide rods.

Description

Curtain brake mechanism for cordless curtains

technical field

The invention relates to a cordless curtain, in particular to a curtain braking mechanism for a cordless curtain.

Background technique

As far as the prior art of the cordless curtain is concerned, one end of the transmission rope 1 is mainly fixed on the rope receiving wheel 2 (as shown in Figure 1), and the other end of the transmission rope 1 passes through the curtain body and then fixed on the lower Beam, by applying downward pull or upward push to the lower beam, the transmission rope 1 can be released or retracted in accordance with the rotation of the rope pulley 2, thereby controlling the unfolding and retracting of the curtain body.

In order to keep the transmission rope 1 at a certain tension during the operation, a guide wheel will be provided in the structure to let the transmission rope 1 circle around, but the guiding effect that the guide wheel can provide is quite limited, so that the transmission rope 1 During the process of winding up the rope pulley 2, the transmission rope 1 of different turns may interfere with each other or become entangled with each other. Unsmooth or stuck problems may cause the curtain body to be highly asymmetrical during use, or even unable to fully unfold or fully retract, which will cause troubles for users.

Contents of the invention

The main purpose of the present invention is to provide a curtain body braking mechanism for a curtain without a drawstring, which can provide a good positioning effect and smooth operation for the curtain body.

In order to achieve the above purpose, the curtain braking mechanism of the present invention includes a base, a retracting unit, two retracting sheaves, two one-way clutch units, two guide rods, and two transmission ropes. The two rope retracting wheels are rotatably arranged on the base and adjacent to the retracting unit, so that each of the rope retracting wheels can be driven by the retracting unit to rotate; each of the one-way clutch units is adjacent to one of the retracting units. The rope wheel has a one-way clutch wheel; each of the guide rods is arranged on the base and located on one side of the rope receiving pulley, and the axial direction of each of the guide rods is parallel to the axial direction of each of the rope receiving pulleys; Each of the transmission ropes straddles a guide rod and wraps around a one-way clutch wheel, and is fixed to a rope receiving wheel with one end thereof.

Thus, when the transmission rope is stretched, the one-way clutch wheel will be driven to rotate through the frictional resistance with the one-way clutch wheel, so that the curtain body can be unfolded smoothly. When the transmission rope stops being stretched, the one-way clutch wheel will rotate. The one-way clutch wheel will stop rotating to keep the curtain body in position. When the transmission rope is loosened to reduce the frictional resistance between the transmission rope and the one-way clutch wheel, the rope take-up wheel will be driven by the retracting unit The transmission rope is rewound, and at this time, the transmission rope can be smoothly rewound on the rope take-up wheel through the guide rod.

Description of drawings

In order to further illustrate the technical content of the present invention, the following detailed description is as follows in conjunction with the embodiments and accompanying drawings, wherein:

Fig. 1 is a schematic cross-sectional view of the existing transmission rope after being retracted.

Fig. 2 is a perspective view of a curtain in accordance with the first embodiment of the present invention.

Fig. 3 is an exploded perspective view of the first embodiment of the present invention.

Fig. 4 is a top sectional view of the one-way clutch unit according to the first embodiment of the present invention.

FIG. 5 is a top view of the one-way clutch unit of the present invention, mainly showing the receiving portion where the planetary gear abuts against the brake block.

FIG. 6 is similar to FIG. 5 , mainly showing that the planetary gear is engaged with the brake part of the brake block.

Fig. 7 is a front view of the present invention with a curtain, mainly showing the unfolded state of the curtain body.

Fig. 8 is similar to Fig. 7, mainly showing the folded state of the curtain body.

Fig. 9 is a cross-sectional view of the rope take-up wheel of the present invention, mainly showing the state of the transmission rope after it is retracted.

Fig. 10 is a top sectional view of the one-way clutch unit according to the second embodiment of the present invention.

detailed description

Please refer to Fig. 2 and Fig. 8 first, the curtain body braking mechanism 12 of the present invention is mainly used with a cordless curtain 10, the cordless curtain 10 shown in the figure includes an upper beam 14, a lower beam 16, and a set The curtain body 18 between the upper and lower beams 14,16. Please refer to Fig. 3 and Fig. 4 again, the curtain braking mechanism 12 of the present invention comprises a base 20, a retracting unit 26, two retracting sheaves 50, two one-way clutch units 60, two guide rods 70, and two transmission Rope 80.

The base 20 is installed in the upper beam 14 and has a top plate 22 and a bottom plate 24 .

The retracting unit 26 has two coil spring wheels 30 and a coil spring 40, the two coil spring wheels 30 are rotatably arranged on the base 20 and engaged with each other, and the two ends of the coil spring 40 are respectively connected to the coil spring wheels 30, The two coil spring wheels 30 can rotate synchronously through the coil spring 40 .

The rope take-up wheels 50 are rotatably arranged on the base 20 and respectively engaged with one coil spring wheel 30 , so that the rope take-up wheel 50 can rotate synchronously with the spring coil wheel 30 engaged with it.

The one-way clutch unit 60 is adjacent to the rope receiving wheel 50 and has a wheel shaft 61 , three brake blocks 62 , one one-way clutch wheel 63 , and three planetary gears 64 . The wheel shaft 61 is fixed on the bottom plate 24 of the base 20; the three brake blocks 62 are fixed on the bottom plate 24 of the base 20 and connected to the outer periphery of the wheel shaft 61 in an equiangular arrangement, so that two adjacent brake blocks 62 An arc-shaped rolling groove 65 is formed between them, and as shown in Figure 5 and Figure 6, the curvature of one end of the arc-shaped rolling groove 65 is greater than the curvature of the other end of the arc-shaped rolling groove 65, because the two sides of each arc-shaped rolling groove 65 The ends are adjacent to different brake blocks 62, so the two ends of each brake block 62 will form a brake part 66 and a receiving part 67 respectively according to the curvature difference between the two ends of the arc-shaped rolling groove 65. The curvature of the moving part 66 is greater than the curvature of the receiving part 67; the one-way clutch wheel 63 has a shaft hole 68 and an inner ring tooth part 69 adjacent to the shaft hole 68, and the one-way clutch wheel 63 is sleeved on the wheel shaft through the shaft hole 68 61. After the one-way clutch wheel 63 is sheathed on the wheel shaft 61, the inner ring tooth portion 69 will surround the brake block 62. In addition, the one-way clutch wheel 63 has an equal-diameter body portion 632; the planetary gear 64 is set In the rolling groove 65 and meshed with the inner ring gear 69 of the one-way clutch wheel 63, the planetary gear 64 can be driven by the inner ring gear 69 of the one-way clutch wheel 63 during the rotation of the one-way clutch wheel 63. Roll along the rolling groove 65.

The guide rod 70 is positioned at one side of the rope receiving wheel 50, and the top and bottom ends of the guide rod 70 are respectively fixed on the top and bottom plates 22, 24 of the base 20, so that the axial direction of the guide rod 70 is parallel to the rope receiving wheel 50. axis.

The two ends of the transmission rope 80 are respectively fixed on the lower beam 16 and the rope take-up wheel 50, so that the transmission rope 80 can be stretched by the lower beam 16 on the one hand, and can be retracted by the rope take-up wheel 50 on the other hand. 80 straddles the guide rod 70 and circles around the isometric body 632 of the one-way clutch wheel 63, so that the transmission rope 80 can timely follow the axial direction of the guide rod 70 and the one-way clutch wheel 63 when it is released or retracted. The axis moves back and forth to improve the agility and smoothness of the transmission rope 80 in action.

When the curtain body 18 is to be unfolded, as shown in Figure 7 , first apply force to pull the lower beam 16 downwards, so that the transmission rope 80 is gradually stretched by the lower beam 16, and will first drive the transmission rope 80 in the process of being stretched. The rope take-up wheel 50 rotates, and then the coil spring wheel 30 engaged with it will be driven to rotate during the rotation of the rope take-up wheel 50, so that the coil spring 40 is retracted from one of the coil spring wheels 30 to another coil spring wheel 30. Accumulate its own elastic recovery force. On the other hand, the frictional resistance between the transmission rope 80 and the one-way clutch wheel 63 will also drive the one-way clutch wheel 63 to rotate during the stretching process. When the one-way clutch wheel 63 starts to rotate, as shown in the figure 5, the one-way clutch wheel 63 drives the planetary gear 64 to roll along the rolling groove 65 to the receiving part 67 of the brake block 62 through the inner ring gear 69. The wheel 63 can rotate freely, so that the curtain body 18 can be continuously expanded.

Once the curtain body 18 is unfolded to a proper position, the pulling force applied to the lower beam 16 is released, so that the transmission rope 80 stops being stretched. At this time, the coil spring wheel 30 will be driven by the elastic recovery force of the coil spring 40. The rope receiving wheel 50 produces a slight reverse rotation, and then a small part of the transmission rope 80 can be wound during the reverse rotation of the rope collection wheel 50, so that the one-way clutch wheel 63 can be pulled by the transmission rope 80 to produce a slight rotation. Reverse rotation, during the reverse rotation of the one-way clutch wheel 63, the inner ring gear 69 will drive the planetary gear 64 to roll along the rolling groove 65 until it is engaged with the brake part 66 of the brake block 62, as shown in the figure As shown in 6, in this way, the planetary gear 64 will stop rotating immediately, and the one-way clutch wheel 63 will stop rotating after the planetary gear 64 stops rotating. At this time, the transmission rope 80 will pass between the one-way clutch wheel 63 The frictional resistance and the weight of the lower beam 16 and the elastic restoring force of the coil spring 40 present a state of static force balance, so that the curtain body 16 can maintain its position.

When the curtain body 16 is to be folded, as shown in FIG. 8 , at first, force is applied to push the lower beam 16 upwards, so that the transmission rope 80 becomes a relaxed state and reduces the frictional resistance with the one-way clutch wheel 63. The elastic recovery force of the coil spring 40 at that time will force the coil spring wheel 30 to rotate simultaneously by means of the user's thrust, and in the process of the coil spring wheel 30 rotating, it will drive the rope receiving wheel 50 to rotate again, so that the rope receiving wheel 50 is aligned with the transmission rope 80. Start to roll up, and during the process of the transmission rope 80 being retracted, the transmission rope 80 will form an orderly arrangement (as shown in Figure 9 ) on the rope take-up wheel 50 through the guiding effect provided by the guide rod 70, and There will be no mutual interference or entanglement, so that the transmission rope 80 can maintain a smooth movement when it is stretched next time. When the curtain body 18 is retracted to a proper position, the thrust applied to the lower beam 16 is released, and the transmission rope 80 will be tightly wound around the one-way clutch wheel 63 again. The frictional resistance between the clutch wheels 63 and the weight of the lower beam 16 will again present a state of static force balance, so that the curtain body 16 can maintain its position.

What needs to be supplemented here is that the present invention can have different changes in structure. As shown in FIG. The moving block 62 is connected to the outer periphery of the wheel shaft 61 in a manner opposite to each other, so that a rolling groove 65 is respectively formed between the two ends of the two braking blocks 62, and a planetary gear 64 is arranged in each rolling groove 65. Therefore, when the one-way clutch wheel 63 is driven by the transmission rope 80 , it can also drive the planetary gear 64 to roll along the rolling groove 65 , so that the clutch effect can also be generated between the planetary gear 64 and the brake block 62 .

To sum up, the curtain body braking mechanism 12 of the present invention utilizes the one-way clutch unit 60 to control the actuation of the transmission rope 80, so that the curtain body 18 can produce a good braking effect during the process of unfolding and retracting. Utilizing the guiding function provided by the guide rod 70 to the transmission rope 80 , the transmission rope 80 can be smoothly and smoothly rolled up, and then the curtain body 18 can be stably unfolded and retracted.

Claims (8)

1. a curtain arrestment mechanism for curtain without stretching wire, includes:

One pedestal；

One retracting unit, is located at this pedestal；

Two rope closing wheels, are rotatably arranged in this pedestal and are adjacent to this retracting unit；

Two one-way clutch unit, are adjacent to this rope closing wheel respectively and are respectively provided with an one-way clutch wheel；

Two guide rods, are located at this pedestal and lay respectively at the side of this rope closing wheel, and respectively this guide rod is axial It is parallel to the axial of each this rope closing wheel；And

Two transmission ropes, are located at this guide rod respectively and are surrounded on this one-way clutch wheel, and with one End is fixed on this rope closing wheel.

2. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 1, wherein this retracting unit Have two wind springs wheel with wind springs, this two wind spring wheel be rotatably arranged in this pedestal and each other bridle joint one Rising, this wind spring connects this two wind spring wheel and is selectively wound in this wind spring wheel；Respectively this rope closing wheel is nibbled Connect this wind spring wheel.

3. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 1, respectively this unidirectional from Closing unit and also have a wheel shaft, at least two brake block, and at least two planetary gears, this wheel shaft is fixed In this pedestal, this two brake block is fixed on this pedestal and is connected to the periphery of this wheel shaft spaced reciprocally, Making to form a rolling groove between this two brake block, this one-way clutch wheel has an axis hole and and is adjacent to The internal ring teeth portion of this axis hole, this axis hole is sheathed on this wheel shaft rotationally, and this internal ring teeth portion is surrounded on this Around two brake block, respectively this planetary gear be rollably located in this rolling groove and bridle joint this is unidirectional The internal ring teeth portion of castle wheel so that the internal ring teeth portion that respectively this planetary gear can be taken turns by this one-way clutch Drive and with this mutual clamping of two brake block or separate.

4. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 3, respectively this unidirectional from Closing wheel and have an isometrical body portion, this isometrical body portion is by this transmission rope institute cincture.

5. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 3, respectively this rolling groove Curved.

6. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 5, respectively this rolling groove The curvature of one end more than the curvature of each other end of this rolling groove so that respectively the two ends of this brake block are divided Not forming a braking parts and a carrier, the curvature of this braking parts is more than the curvature of this carrier, when respectively When this planetary gear is connected in the braking parts of this brake block, this one-way clutch wheel cannot rotate, when respectively should Planetary gear is connected to the carrier of this brake block, and this one-way clutch wheel can be freely rotatable.

7. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 3, respectively this unidirectional from The number of brake block closing unit is two, this two brake block centered by this wheel shaft in being oppositely arranged.

8. the curtain arrestment mechanism of curtain without stretching wire as claimed in claim 3, respectively this unidirectional from The number of brake block closing unit is three, this three brake block centered by this wheel shaft in angularly arranging, Make to be formed between adjacent two these brake block this rolling groove.