TW201621147A - Shutter body positioning mechanism of rope-free curtain - Google Patents

Abstract

A shutter body positioning mechanism of a rope-free curtain is provided and characterized by using two clutch units to control the positioning effect of a shutter body in the process of unfolding and folding, the clutch unit has a shaft, two brake pads, a clutch wheel and two planetary gears, the two brake pads are spaced apart and connected to the periphery of the shaft, so as to form a rolling groove between the two brake pads, the clutch wheel is sheathed on the shaft and has an inner ring tooth portion surrounding the two brake pads, the planetary gear is disposed in the rolling groove and engaged with the inner ring tooth portion of the clutch wheel so that the planetary gears can be driven by the inner ring tooth portion of the clutch wheel to mutually engage or disengage with the brake pads, whereby, when the planetary gears are engaged with the brake pads, the shutter body is unable to be driven and the positioning is completed.

Description

Curtain body positioning mechanism without drawstring curtain

The invention relates to a cordless curtain, in particular to a curtain body positioning mechanism without a drawstring curtain.

The general curtains can be divided into a drawstring type and a no drawstring type. Among them, the pull cord type curtain mainly uses a pull cord to drive the curtain body to perform unfolding or folding, and the pull cord type curtain is Using the force of the hand to pull down or push the lower beam, the curtain can achieve the effect of unfolding or folding.

However, although the cordless curtain can allow the user to easily adjust the unfolding or folding of the curtain body, the structural configuration often lacks a good positioning design, and the curtain body tends to have an automatic rebound after being fully deployed. Or the problem of automatic sagging after the full collapse, which will cause the user to be troubled by the actual operation.

The main object of the present invention is to provide a curtain body positioning mechanism without a drawstring curtain, which has a simple structure and good positioning effect, so as to increase the convenience of operation.

In order to achieve the above object, the curtain body positioning mechanism of the present invention comprises a base, two coil springs, a coil spring, two rope pulleys, two clutch units, and two ropes. Each of the coil springs is rotatably disposed on the base and meshed with each other; the coil spring is coupled to the two coil springs and optionally wound around a coil spring such that the two coil springs can be synchronized Rotating; the two rope pulleys are rotatably disposed on the base and respectively engage the coil springs, so that the rope pulleys can rotate synchronously with the coil springs that are engaged with them; each of the clutch units respectively Adjacent to one of the rope pulleys and having an axle, at least two brake pads, a clutch wheel, and at least two planetary gears, the axle is fixed to the base, and the two brake pads are fixed to the base at intervals Connecting to the circumference of the axle, a rolling groove is formed between the two brake blocks, the clutch wheel has a shaft hole and an inner ring tooth portion adjacent to the shaft hole, and the shaft hole is rotatably sleeved on the axle The inner ring tooth portion surrounds the two brake pads, each of the planetary gears is rollably disposed in a rolling groove and engages an inner ring tooth portion of the clutch wheel, so that each of the planetary gears can be The inner ring of the clutch wheel is driven to be engaged or separated from the brake block Respectively surrounding each of the cord, and a clutch wheel which are fixed at one end thereof a wheel of the rope to drive the clutch wheel rotates during deployment of the shutter body.

Thereby, when the planetary gear is engaged with the inner ring portion of the clutch wheel, the clutch wheel cannot rotate, and the curtain body cannot be unfolded or folded to complete the positioning, when the planetary gear is disengaged from the When the inner ring portion of the wheel is disengaged, the clutch wheel can be freely rotated, and the curtain body can be deployed at this time.

Referring to Figures 1 and 7, the curtain body positioning mechanism 12 of the present invention is mainly used with a cordless curtain 10, and the cordless curtain 10 shown in the drawing comprises an upper beam 14, a lower beam 16, and a set. The curtain 18 between the upper and lower beams 14, 16. Referring to FIGS. 2 and 3 , the curtain positioning mechanism 12 of the present invention includes a base 20 , two coil springs 30 , a coil spring 40 , two rope pulleys 50 , two clutch units 60 , and two ropes 70 . .

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

The coil springs 30 are rotatably disposed on the base 20 and are engaged with each other.

The two ends of the coil spring 40 are respectively connected to the coil spring 30 so that the two coil springs 30 can be synchronously rotated by the coil spring 40.

The rope pulley 50 is rotatably disposed on the base 20 and respectively engages a coil spring 30 so that the rope pulley 50 can rotate in synchronization with the coil spring 30 that is engaged therewith.

The clutch unit 60 is disposed adjacent to the rope pulley 50 and has an axle 61, a three brake block 62, a clutch wheel 63, and three planetary gears 64. The axle 61 is fixed to the bottom plate 24 of the base 20; the three brake pads 62 are fixed to the bottom plate 24 of the base 20 and are connected to the outer circumference of the axle 61 in an equiangular manner so that an adjacent two brake blocks 62 are formed. An arcuate rolling groove 65, as shown in Figs. 4 and 5, the curvature of one end of the arcuate rolling groove 65 is greater than the curvature of the other end of the arcuate rolling groove 65, since both ends of each of the arcuate rolling grooves 65 are Adjacent to the different brake pads 62, the two ends of each of the brake pads 62 respectively form a braking portion 66 and a receiving portion 67 along the curvature difference between the two ends of the arcuate rolling groove 65, and the curvature of the braking portion 66 is greater than The clutch wheel 63 has a shaft hole 68 and an inner ring tooth portion 69 adjacent to the shaft hole 68. The clutch wheel 63 is sleeved on the wheel shaft 61 through the shaft hole 68, and the clutch wheel 63 is sleeved on the wheel axle. 61 thereafter, the inner ring tooth portion 69 is surrounded by the brake block 62; the planetary gear 64 is disposed in the rolling groove 65 and is engaged with the inner ring tooth portion 69 of the clutch wheel 63 so that the planetary gear 64 can be at the clutch wheel 63. During the rotation, the inner ring tooth portion 69 of the clutch wheel 63 is driven to roll along the rolling groove 65.

The pull cord 70 surrounds the clutch wheel 63 one turn and is fixed to the lower beam 16 and the rope pulley 50 at both ends thereof respectively, so that the pull rope 70 can drive the clutch wheel 63 together with the rope pulley 50 by the pulling of the lower beam 16. Turn.

When the curtain 18 is to be unfolded, as shown in Fig. 6, firstly, the lower beam 14 is pulled downward to force the drawstring 70 to be stretched by the lower beam 14, and the drawstring 70 is first stretched. The clutch wheel 63 and the rope pulley 50 are driven to start to rotate. During the rotation of the clutch wheel 63, as shown in FIG. 4, the clutch wheel 63 drives the planetary gear 64 to roll along the rolling groove 65 by the inner ring tooth portion 69. The receiving portion 67 of the block 62, at this time, the planetary gear 64 will assume an idling state, so that the clutch wheel 63 can be freely rotated by the pulling rope 70, and on the other hand, the spinning wheel 50 will be driven during the rotation. The engaged coil spring 30 rotates, causing the coil spring 40 to be retracted from one of the coil springs 30 to the other coil spring 30 to accumulate its own elastic restoring force.

Once the curtain 18 is unfolded to the proper position and then the tension applied to the lower beam 14 is released, the coil spring 30 at this time is subjected to the elastic restoring force of the coil spring 40 to drive the rope pulley 50 to generate a slight reverse rotation. Then, during the reverse rotation of the rope pulley 50, a small portion of the rope 70 is wound, so that the clutch wheel 63 can be pulled by the rope 70 to generate a slight reverse rotation, and the clutch wheel 63 rotates in the opposite direction. During the process, the inner ring gear 69 drives the planetary gear 64 to roll along the rolling groove 65 to form a catch with the braking portion 66 of the brake block 62, as shown in FIG. 5, so that the planetary gear 64 will stop immediately. Rotation, after the planetary gear 64 stops rotating, the clutch wheel 63 is stopped to rotate. At this time, the pull cord 70 exerts a static balance with the elastic restoring force of the coil spring 40 by the frictional resistance with the clutch wheel 63. The state of the curtain 16 can be maintained in an unfolded state.

When the curtain body 16 is to be folded, as shown in Fig. 7, first, the lower beam 14 is pushed upward to apply force to make the rope 70 become slack and reduce the frictional resistance with the clutch wheel 63. The elastic restoring force of the coil spring 40 forces the coil spring wheel 30 to rotate in the opposite direction at the same time by the user's thrust. During the rotation of the coil spring wheel 30, the rope pulley 50 is further rotated to make the rope pulley 50 pair pull the rope. 70 is retracted until the curtain 18 is fully folded, and then the thrust applied to the lower beam 14 is released, so that the drawstring 70 is again tightly wound around the clutch wheel 63. At this time, the elastic restoring force of the coil spring 40 and the pull cord 70 are separated from each other. A state of static balance is again exhibited between the frictional resistances between the wheels 63, so that the curtain body 16 is kept in the folded state.

It should be additionally noted that the present invention may have different changes in structure. As shown in FIG. 8, the number of the brake pads 62 does not have to be three, and may actually be reduced to two. In this case, the brake is used. The blocks 62 are connected to the outer periphery of the axle 61 in such a manner that a rolling groove 65 is formed between the two ends of the two brake blocks 62, and a planetary gear 64 is disposed in each of the rolling grooves 65. When the clutch wheel 63 is driven by the pull cord 70, the planetary gear 64 can also be driven to roll along the rolling groove 65, so that the clutching effect can also be generated between the planetary gear 64 and the brake block 62.

In summary, the curtain body positioning mechanism 12 of the present invention provides a good positioning effect on the curtain body 18 by the clutch unit 60. The overall structure has a simple structural configuration, and the stability of operation is also very good, so that the curtain can be effectively solved. The lifting effect of the body 18 after unfolding and the sag problem at the time of folding achieve the purpose of increasing the convenience of operation.

10‧‧‧Without drawstring curtains
12‧‧ ‧ Curtain positioning mechanism
14‧‧‧上梁
16‧‧‧Lower beam
18‧‧ ‧ curtain body
20‧‧‧ Pedestal
22‧‧‧ top board
24‧‧‧floor
30‧‧‧Wind wheel
40‧‧‧ coil spring
50‧‧‧Drawing wheel
60‧‧‧ clutch unit
61‧‧‧Axle
62‧‧‧ brake pads
63‧‧‧Clutch wheel
64‧‧‧ planetary gear
65‧‧‧ rolling trough
66‧‧‧Brake
67‧‧‧Receiving Department
68‧‧‧Axis hole
69‧‧‧ Inner ring tooth
70‧‧‧Drawstring

Fig. 1 is a perspective view of a curtain according to a first embodiment of the present invention. Fig. 2 is an exploded perspective view showing the first embodiment of the present invention. Fig. 3 is a cross-sectional view showing the clutch unit according to the first embodiment of the present invention. Figure 4 is a plan view of the clutch unit of the present invention, mainly showing the planetary gear being engaged with the braking portion of the brake block. Fig. 5 is similar to Fig. 4 and mainly shows that the planetary gear abuts against the receiving portion of the brake block. Fig. 6 is a front view of the present invention in combination with the curtain, mainly showing the unfolded state of the curtain. Figure 7 is similar to Figure 6, which mainly shows the collapsed state of the curtain. Figure 8 is a cross-sectional view showing the clutch unit of the second embodiment of the present invention.

12‧‧ ‧ Curtain positioning mechanism

20‧‧‧ Pedestal

22‧‧‧ top board

24‧‧‧floor

30‧‧‧Wind wheel

40‧‧‧ coil spring

50‧‧‧Drawing wheel

61‧‧‧Axle

62‧‧‧ brake pads

63‧‧‧Clutch wheel

64‧‧‧ planetary gear

65‧‧‧ rolling trough

66‧‧‧Brake

67‧‧‧Receiving Department

68‧‧‧Axis hole

70‧‧‧Drawstring

Claims (5)

A curtain body positioning mechanism for a cordless curtain comprises: a base; two coil springs rotatably disposed on the base and meshed with each other; a coil spring connecting the two coil springs and Optionally wound on a coil spring; two rope pulleys are rotatably disposed on the base and respectively engage a coil spring wheel; two clutch units are respectively disposed adjacent to one of the rope pulleys and have respectively a wheel axle, at least two brake pads, a clutch wheel, and at least two planet gears, the axle is fixed to the base, the brake pads are fixed to the base at intervals and connected to a circumference of the axle, so that the two brakes Forming a rolling groove between the blocks, the clutch wheel has a shaft hole and an inner ring tooth portion adjacent to the shaft hole, the shaft hole is rotatably sleeved on the wheel shaft, and the inner ring tooth portion surrounds the two brakes Around the block, each of the planetary gears is rotatably disposed in a rolling groove and engages an inner ring tooth portion of the clutch wheel, so that each of the planetary gears can be driven by the inner ring tooth portion of the clutch wheel One of the brake pads is snapped or separated from each other; and two drawstrings are respectively wrapped around The clutch wheel and respectively fixed to one end thereof to the rope wheel. The curtain body positioning mechanism of the cordless curtain according to claim 1, wherein each of the rolling grooves has an arc shape. The curtain body positioning mechanism of the cordless curtain according to claim 2, wherein a curvature of one end of each of the rolling grooves is greater than a curvature of the other end of each of the rolling grooves, so that a braking portion is formed at each end of each of the braking blocks And a receiving portion, the curvature of the braking portion is greater than the curvature of the receiving portion, and when the planetary gears are engaged with the braking portion of the braking block, the clutch wheel cannot rotate, and when the planetary gears abut the braking block The receiving portion is capable of freely rotating. The curtain body positioning mechanism of the cordless curtain according to claim 3, wherein the number of the brake blocks of each of the clutch units is two, and the two brake blocks are disposed opposite to each other around the axle. The curtain body positioning mechanism of the cordless curtain according to claim 3, wherein the number of the brake blocks of each of the clutch units is three, and the three brake blocks are disposed at equal angles around the axle, so that the two adjacent brakes are provided. A rolling groove is formed between the blocks.