TWI534337B - No curtain curtain curtain body positioning mechanism and the use of the curtain body positioning mechanism without rope curtains - Google Patents

Description

Curtain body positioning mechanism without drawstring curtain and cordless curtain using the curtain body positioning mechanism

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

The general curtains can be divided into a drawstring type and a no drawstring type in the structure. Among them, the drawstring type curtain mainly uses a pull cord to drive the curtain body to expand or fold, and the pull cord type curtain is utilized. The hand applies a pull-down or push-up force to the lower beam to enable the curtain to 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 foregoing object, the curtain body positioning mechanism of the present invention comprises a fixing seat, two resistance units, two first transmission wheels, two transmission ropes, two second transmission wheels, and a coil spring. The resistance unit has a one-way ratchet and a resistance wheel, and the one-way ratchet is pivotally disposed on the fixed seat. The resistance wheel has a resistance wheel axle and a one-way toothed disk, and the resistance wheel axle is rotatably disposed on the fixed wheel And the one-way toothed disc is connected to one end of the resistance wheel shaft and is engaged with the one-way ratchet; the two first transmission wheels are rotatably and spaced apart from each other. One of the two transmission wheels is rotatably disposed between the two first transmission wheels, and the second transmission wheels are Interacting with each other and respectively engaging a first transmission wheel; the coil spring is connected to the two second transmission wheels and can be wound around one of the second transmission wheels by the rotation of the two second transmission wheels.

Thereby, the curtain body of the present invention is used for unfolding and collapsing by utilizing the frictional resistance generated between each of the transmission ropes and the resistance wheel surrounded by the same and the engagement relationship between the resistance wheel and the one-way ratchet. Good positioning results can be obtained in the process.

Preferably, each of the resistance units further has a resistance elastic piece disposed on the fixing base and having a spring arm and a friction portion disposed on the elastic arm, the resistance wheel has a friction disk, and the friction disk is connected At the other end of the resistance axle and abutting against the friction portion of the resistance elastic piece, the resistance effect provided by the resistance unit can be improved.

Preferably, the fixing seat has a first blocking wall and a second blocking wall, and the one-way ratchet is interposed between the first and second blocking walls and has an arc portion elastically resisting Connected to the first barrier wall, the one-way ratchet enables the one-way toothed disc to maintain one-way rotation.

In addition, a secondary object of the present invention is to provide a cordless curtain comprising an upper beam, a lower beam opposite the upper beam, and a curtain body disposed between the upper and lower beams, A fixing seat of the curtain positioning mechanism is installed in the upper beam, and the other end of the driving rope of the curtain positioning mechanism is connected to the lower beam through the curtain body, so that the lower beam can be synchronized with the two transmission ropes.

Please refer to Figures 1 and 4 first. The cordless curtain 10 shown in the figure comprises an upper beam 12, a lower beam 14 opposite the upper beam 12, and a curtain disposed between the upper and lower beams 12, 14. Body 16. Referring to FIG. 2 again, the curtain body positioning mechanism 18 of the first embodiment of the present invention includes a fixing base 20, two resistance units 30, two first transmission wheels 41, two transmission cables 44, and two second transmission wheels 51, and A coil spring 54.

The fixing base 20 is mounted in the upper beam 12 and has an upper fixing plate 21 and a lower fixing plate 23, and the upper and lower fixing plates 21, 23 are joined to each other.

Each of the resistance units 30 has a one-way ratchet 31, a resistance elastic piece 32, and a resistance wheel 33. The one-way ratchet 31 is interposed between the first retaining wall 25 of the fixed seat 20 and the second retaining wall 26 of the fixed seat 20 and is pivoted on the fixed seat 20 at one end thereof and the lower fixing plates 21 and 23 One side of the one-way ratchet 31 has an arcuate portion 312 that abuts against the first retaining wall 25 of the fixed seat 20 so that the one-way ratchet 31 can be first when subjected to an external force. The resisting elastic piece 32 has a fixed arm 321 , a resilient arm 322 and a friction portion 324 . The two ends of the fixed arm 321 are fixed on the fixed seat 20 and the lower fixing plate 21 . Between the two ends 23, the elastic arm 322 extends from one end of the fixed arm 321 , and the friction portion 324 is disposed at the end of the elastic arm 322 . The resistance wheel 33 has a resistance wheel shaft 34 and a one-way toothed disk 35 in this embodiment. And a friction disc 36, the resistance wheel shaft 34 is rotatably disposed on the fixed seat 20 and between the lower fixing plates 21, 23. The one-way toothed disc 35 is coupled to the bottom end of the resisting wheel shaft 34 and is engaged with the one-way ratchet The teeth 31 are such that the one-way toothed disc 35 can only be rotated in one direction, and the friction disk 36 is connected to the top end of the resistance wheel shaft 34 and abuts against the friction portion 324 of the resistance elastic piece 32.

Each of the first transmission wheels 41 has two first transmission spurs 42 (actually only one at least one) and a first transmission axle 43 connected between the two first transmission spurs 42. A transmission axle 43 is disposed between the fixed seat 20 and the lower fixing plates 21, 23. After the assembly is completed, the two first transmission wheels 41 are disposed between the two resistance wheels 33 at a distance from each other.

As shown in FIGS. 3 and 4, one end of each of the drive cables 44 is fixed to the first transmission wheel shaft 43 of the first transmission wheel 41, and surrounds the resistance wheel shaft 34 of the resistance wheel 33 one turn and then passes through the curtain body 16 at the other end. And fixed to the lower beam 14.

Each of the second transmission wheels 51 has two second transmission spurs 52 (actually only at least one) and a second transmission axle 53 connected between the two second transmission spurs 52, by assembly The second transmission wheel shaft 53 is disposed on the fixing base 20 and between the lower fixing plates 21 and 23, so that the second transmission toothed disks 52 of the two second transmission wheels 51 are meshed with each other, and the second and second The second drive sprocket 52 of the drive wheel 51 is re-engaged with the first drive sprocket 42 of the first drive wheel 41 such that the first drive wheel 41 can rotate synchronously with the second drive wheel 51.

The coil spring 54 connects the second transmission axle 53 of the two second transmission wheels 51 and is selectively wound around the second transmission axle 53 of one of the second transmission wheels 51.

When the curtain body 16 is to be unfolded, as shown in Fig. 4, the lower beam 14 is first pulled downward to force the respective transmission ropes 44 to be stretched by the lower beam 14, and the transmission rope 44 is stretched. First, the resistance wheel 33 is driven to rotate with the first transmission wheel 41, and then the first transmission wheel 41 drives the second transmission wheel 51 to rotate, so that the coil spring 54 is retracted from one of the second transmission wheels 51 to the other second transmission wheel. 51, while accumulating its own elastic restoring force, on the other hand, during the rotation of the resistance wheel 33, the curtain body 16 can be stably operated by the friction effect generated between the friction disk 36 and the friction portion 324 of the resistance elastic piece 32. Once the curtain 16 is fully deployed, the tension applied to the lower beam 14 is released, and the resistance wheel 33 at this time stops the rotation by the meshing relationship between the one-way ratchet 31 and the one-way toothed disc 35. As a result, the drive cord 44 is in a state of static balance with the elastic restoring force of the coil spring 54 by the frictional resistance with the resistance wheel 33, so that the curtain body 16 can be maintained in the unfolded state.

When the curtain body 16 is to be folded, as shown in Fig. 5, first, the lower beam 14 is pushed upward to apply force to lower the transmission rope 44 to reduce the frictional resistance with the resistance wheel 33. The elastic restoring force of the coil spring 54 forces the two second transmission wheels 51 to rotate in the opposite direction at the same time by the user's thrust. During the rotation of the second transmission wheel 51, the first transmission wheel 41 is further rotated to make the first The transmission wheel 41 retracts the transmission rope 44 until the curtain 16 is fully folded, and then releases the thrust applied to the lower beam 14, so that the transmission rope 44 is again wound around the resistance wheel 33, and the elastic restoring force of the coil spring 54 at this time. Between the frictional resistance between the drive rope 44 and the resistance wheel 33, a state of static balance is again exhibited, so that the curtain body 16 is kept in the folded state.

It should be additionally noted that the present invention may have different variations in structure. As shown in Fig. 6, the resistance wheel shaft 64 of the resistance wheel 63 is surrounded by two transmission ropes 44, and the two transmission ropes 44 are resisted. The friction discs 65 of the wheel 63 are spaced apart, and one end of the two transmission ropes 44 are commonly connected to a first transmission wheel 61. In addition, the two second transmission wheels 62 are connected by two coil springs 54. Together, such a structural configuration can be used with a large-sized curtain.

In summary, the curtain body positioning mechanism 18 of the present invention mainly utilizes the frictional resistance generated between the transmission rope 44 and the resistance wheel 33 and the meshing relationship between the one-way ratchet 31 and the resistance wheel 33 to the curtain body 16. The invention provides a good positioning effect, so as to effectively solve the problem that the curtain body is lifted after unfolding and the drooping problem during folding, thereby achieving the purpose of increasing the convenience of use.

10‧‧‧Without drawstring curtains

12‧‧‧上梁

14‧‧‧Lower beam

16‧‧ ‧ curtain body

18‧‧ ‧ Curtain positioning mechanism

20‧‧‧ Fixed seat

21‧‧‧Upper fixing plate

23‧‧‧Under the fixed plate

25‧‧‧First barrier

26‧‧‧ second barrier

30‧‧‧resistance unit

31‧‧‧ one-way ratchet

312‧‧‧ Curved Department

32‧‧‧Resistance shrapnel

321‧‧‧Fixed Arm

322‧‧‧Bounce arm

324‧‧‧ Friction Department

33‧‧‧Resistance wheel

34‧‧‧Resistance axle

35‧‧‧ one-way toothed disc

36‧‧‧ friction disk

41‧‧‧First transmission wheel

42‧‧‧First transmission toothed disc

43‧‧‧First transmission axle

44‧‧‧Drive rope

51‧‧‧second transmission wheel

52‧‧‧Second drive toothed disc

53‧‧‧Second transmission axle

54‧‧‧ coil spring

61‧‧‧First transmission wheel

62‧‧‧second drive wheel

63‧‧‧Resistance wheel

64‧‧‧Resistance axle

65‧‧‧ friction disk

Fig. 1 is a perspective view showing a curtain body positioning mechanism according to a first embodiment of the present invention attached to a cordless curtain. Fig. 2 is a partially exploded perspective view showing the first embodiment of the present invention. Fig. 3 is a plan view showing a first embodiment of the present invention. Fig. 4 is a plan view showing the first embodiment of the present invention in combination with a cordless curtain, mainly showing the state in which the drive cord is stretched. Figure 5 is similar to Figure 4 and mainly shows the state of the drive rope after it is retracted. Figure 6 is a partially exploded perspective view showing a second embodiment of the present invention.

18 Curtain positioning mechanism 20 fixing seat 21 fixing plate 23 lower fixing plate 25 first blocking wall 26 second blocking wall 30 resistance unit 31 one-way ratchet 312 curved portion 32 resistance elastic piece 321 fixed arm 322 elastic arm 324 friction portion 33 resistance wheel 34 resistance wheel shaft 35 one-way toothed disc 36 friction disc 41 first transmission wheel 42 first transmission toothed disc 43 first transmission wheel shaft 44 transmission rope 51 second transmission wheel 52 second transmission toothed disc 53 second transmission wheel shaft 54 Coil spring

Claims (8)

A curtain body positioning mechanism for a cordless curtain comprises: a fixing base; two resistance units respectively having a one-way ratchet and a resistance wheel, wherein the one-way ratchet is pivotally disposed on the fixing seat, the resistance wheel has a resistance wheel axle and at least one one-way toothed disk, the resistance wheel axle is rotatably disposed on the fixing seat, the one-way toothed disk is connected to one end of the resistance wheel axle and is engaged with the one-way ratchet; Rotatingly and spaced apart from each other on the fixing base; two driving ropes respectively surrounding a resistance wheel shaft of the resistance wheel and respectively connecting one of the first transmission wheels with one end thereof; and two second transmission wheels rotatably Provided in the fixing seat and located between the two first transmission wheels, the two second transmission wheels mesh with each other and respectively engage a first transmission wheel; and a coil spring connecting the second transmission wheels and Optionally wound on one of the two second transmission wheels. The curtain body positioning mechanism of the cordless curtain according to claim 1, wherein each of the resistance units further has a resistance elastic piece disposed on the fixing base and having a spring arm and a friction provided on the elastic arm. And the friction wheel has a friction disc disposed on the resistance wheel shaft and abutting against the friction portion of the resistance elastic piece. The curtain body positioning mechanism of the cordless curtain according to claim 1, wherein the fixing seat has a first blocking wall and a second blocking wall, and the one-way ratchet is interposed between the first and second blocking walls. There is an arc portion that abuts against the first barrier wall. The curtain body positioning mechanism of the cordless curtain according to claim 1, wherein each of the first transmission wheels has a first transmission toothed disc and a first transmission wheel shaft connecting the first transmission toothed disc, the transmission rope One end is fixed to the first transmission wheel shaft, and each of the second transmission wheels has a second transmission toothed disc and a second transmission wheel shaft connected to the second transmission toothed disc. The second transmission toothed disc engages the first transmission wheel a first drive toothed disk, the coil spring connecting the second drive wheel shafts of the two second drive wheels and optionally winding the second drive wheel shaft of one of the second drive wheels. A cordless curtain comprising: an upper beam; a lower beam located below the upper beam; a curtain body disposed between the upper and lower beams; and a curtain positioning mechanism as claimed in claim 1 The fixing seat is disposed in the upper beam, and the other end of each of the driving ropes passes through the curtain body and is connected to the lower beam. The cordless curtain according to claim 5, wherein each of the resistance units further has a resistance elastic piece disposed on the fixing base and having a spring arm and a friction portion disposed on the elastic arm, the resistance wheel There is a friction disc connected to the other end of the resistance wheel shaft and abutting against the friction portion of the resistance elastic piece. The cordless curtain according to claim 5, wherein the fixing seat has a first blocking wall and a second blocking wall, and the one-way ratchet is interposed between the first and second blocking walls and has an arc a curved portion that abuts against the first blocking wall. The cordless curtain according to claim 5, wherein each of the first transmission wheels has a first transmission toothed disc and a first transmission wheel shaft connected to the first transmission toothed disc, and one end of the transmission rope is fixed to the first transmission shaft a transmission wheel shaft, each of the second transmission wheels has a second transmission toothed disc and a second transmission wheel shaft connected to the second transmission toothed disc, the second transmission toothed disc meshing with the first transmission tooth of the first transmission wheel And a coil spring connecting the second transmission wheel shafts of the two second transmission wheels and optionally winding the second transmission wheel shaft of one of the second transmission wheels.