TW201621144A - Curtain body positioning mechanism of rope-free window curtain - Google Patents

Abstract

A curtain body positioning mechanism of rope-free window curtain includes a fasten seat, two first transmission wheels, two second transmission wheels, two mobile shafts and two resistance wheels. The first transmission wheels are fastened on the fasten seat and mutually connected by utilizing a volute spring, the second transmission wheels are fastened on the fasten seat and engaged with the first transmission wheels, the second transmission wheels are connected to a transmission rope, the two mobile shafts are disposed on the fasten seat and capable of transversally moving and mutually connected by utilizing a tension spring, the resistance wheels are rotatably sleeved on the mobile shafts and reeled by the transmission rope, so that the resistance wheels can be connected and latched with a stopping member of the fasten seat through the elastic recovering force provided by the tension spring, and can be separated from the stopping member through a pulling force provided by the transmission rope. Accordingly, an excellent positioning effect can be provided during the folding and unfolding process of the curtain body.

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.

In the case of conventional techniques without a corded curtain, such as U.S. Patent No. 7,025,107, the use of a one-way tensioning mechanism to control the actuation of the first and second drawstrings, during the deployment of the curtain, one-way tensioning The mechanism will be driven to the disengaged position by the first and second drawstrings. At this time, the first and second drawstrings can be freely actuated. Once the curtains are stopped, the one-way tensioning mechanism will be pulled by the first and second pulls. The rope is brought to the engaged position, and the first and second drawstrings at this time cannot be retracted by the brake to complete the positioning of the curtain. However, in this conventional patent case, the brake and the one-way tensioning mechanism are individually disposed in the top rail, and in addition to increasing the complexity of the overall structure, due to the limited space in the top rail, it is bound to cause assembly trouble. problem.

The main object of the present invention is to provide a curtain body positioning mechanism without a drawstring curtain, which can simplify the structure and has a good positioning effect, thereby increasing the convenience of operation.

In order to achieve the above object, the curtain body positioning mechanism of the present invention comprises a fixing base, two first transmission wheels, one coil spring, two second transmission wheels, two transmission ropes, and a resistance unit. The two ends of the fixing seat respectively have an upper guiding groove and a lower guiding groove. The upper and lower guiding grooves are mutually corresponding to each other; the two first transmission wheels are rotatably disposed on the fixing seat and are meshed with each other; a coil spring is coupled to the two first transmission wheels and can be wound around one of the first transmission wheels by rotation of the two first transmission wheels; the second transmission wheels are rotatably disposed on the fixing base and are respectively engaged Connecting the first transmission wheel to enable the first and second transmission wheels to rotate synchronously; one end of each of the transmission ropes is connected to the second transmission wheel, so that each of the transmission ropes can drive the second when the tension is applied The transmission wheel rotates, and can be wound on the second transmission wheel when the second transmission wheel is driven by the first transmission wheel; the resistance unit has two movable shafts, one force spring, two stops, and two a resistance wheel, the top and bottom ends of each of the movable shafts are movably embedded in the upper and lower guide grooves, and the tension spring is connected to the two movable shafts for moving the two movable shafts to the second Pulling in the direction of the driving wheel, each of the stopping members is disposed on the fixing seat and located at the Between the two transmission wheels and the movable shaft, each of the resistance wheels is rotatably sleeved on a movable shaft and surrounded by a transmission rope, so that each of the resistance wheels can be pulled by the transmission rope The stoppers are separated from each other, and can be further engaged with the stopper by the elastic restoring force of the tension spring, so that a good positioning effect can be provided in the process of unfolding the curtain body and the folding curtain body.

More preferably, each of the top and bottom ends of each of the movable shafts has an upper guide block and a lower guide block, and the upper and lower guide blocks are respectively embedded in the upper and lower guide slots, the upper and lower portions. The length of the guiding block is smaller than the length of the upper and lower guiding grooves, so that the movable shaft can be assembled to the fixing seat in a movable manner.

More preferably, the stopping member is a rod body, and each of the resistance wheels has an upper sprocket wheel and a lower sprocket wheel, and each of the resistance wheels can be supported by the upper and lower spurs when receiving the elastic restoring force of the tension spring. The buckle is coupled to the stopper, so that each of the resistance wheels stops rotating to generate frictional resistance with the transmission rope.

Please refer to Figures 1 and 5 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 positioning mechanism 18 of the present invention includes a fixing base 20, two first transmission wheels 30, a coil spring 40, two second transmission wheels 50, two transmission ropes 60, and a resistance unit 70. .

The mount 20 is mounted within the upper beam 12. The fixing base 20 has an upper fixing plate 21 and a lower fixing plate 25, and the upper and lower fixing plates 21 and 25 are assembled in a vertically symmetrical manner. The bottom surface of the upper fixing plate 21 has four fixing posts 22 arranged at intervals. The two ends of the upper fixing plate 21 respectively have an upper guiding groove 23 and a fixing hole 24 adjacent to the upper guiding groove 23, wherein the upper guiding portion The groove 23 extends along the length direction of the upper fixing plate 21, and the top surface of the lower fixing plate 25 has four fixing posts 26 arranged at intervals, the top end of the lower fixing column 26 and the bottom end of the fixing column 22 above the upper fixing plate 21. Inserted together, the two ends of the lower fixing plate 25 respectively have a lower guiding groove 27 and a fixing hole 28 adjacent to the lower guiding groove 27, wherein the lower guiding groove 27 is along the length of the lower fixing plate 25. The direction extends and corresponds to the upper guide groove 23 of the upper fixing plate 21, and the lower fixing hole 28 corresponds to the fixing hole 24 of the upper fixing plate 21.

The first transmission wheel 30 has two first transmission spurs 31 and a first transmission axle 32 connected between the two first transmission spurs 31. The first transmission axle 32 is sleeved on the fixed seat 20 during assembly. Two of the upper and lower fixing posts 22, 26, after the assembly is completed, the first drive gears 31 of the two first transmission wheels 30 are engaged with each other, so that the two first transmission wheels 30 can rotate synchronously.

The two ends of the coil spring 40 are respectively connected to the first transmission wheel shaft 32 of the first transmission wheel 30, so that the coil spring 40 can be wound around the first one of the first transmission wheels 30 by the rotation of the two first transmission wheels 30. Transmission axle 32.

The second transmission wheel 50 has two second transmission gears 51 and a second transmission axle 52 connected between the two second transmission gears 51. The second transmission axle 52 is sleeved on the fixing base 20 during assembly. The other two upper and lower fixing posts 22, 26, after the assembly is completed, the second transmission toothed disc 51 of the second transmission wheel 50 will be engaged with the first transmission toothed disc 31 of the first transmission wheel 30, so that the first The second transmission wheels 30, 50 are capable of synchronous rotation.

One end of the drive rope 60 is fixed to the second transmission wheel shaft 52 of the second transmission wheel 50, and the other end of the transmission rope 60 passes through the curtain body 16 and is fixed to the lower beam 14.

The resistance unit 70 has two movable shafts 71, two tension springs 72, two stoppers 73, and two resistance wheels 74 as shown in FIGS. 2 to 4. The top and bottom ends of the movable shaft 71 respectively have a guide block 75. The movable shaft 71 is embedded in the upper and lower guide grooves 23 and 27 by the guide block 75. Since the length of the guide block 75 is smaller than the upper limit, The length of the lower guide grooves 23, 27 is such that the movable shaft 71 can move along the upper and lower guide grooves 23, 27 of the fixed seat 20; the two tension springs 72 are respectively connected between the guide blocks 75 of the two movable shafts 71, The movable shaft 71 is pulled toward the second transmission wheel 50. The stopper 73 is exemplified by the rod body. When assembling, the top and bottom ends of the stopper 73 are respectively inserted and fixed to the fixing base 20. In the upper and lower fixing holes 24, 28, after the assembly is completed, the stopper 73 will be located between the second transmission wheel 50 and the movable shaft 71; the resistance wheel 74 has two resistance toothed discs 76 connected to the two resistance teeth. The resistance wheel axle 77 between the discs 76, the resistance wheel 74 is sleeved on the movable shaft 71 by the resistance wheel axle 77 and surrounded by the transmission rope 60 during assembly, so that the resistance wheel 74 can be pulled by the transmission rope 60 on the one hand. The resistance toothed disc 76 is disengaged from the stopper 73, and on the other hand, the resistive toothed disc 76 can be made by the elastic restoring force of the tension spring 72 to the movable shaft 71. Contact with the stopper 73.

When the curtain 16 is to be unfolded, as shown in Fig. 5, the lower beam 14 is first pulled downward to force the respective transmission ropes 60 to be stretched by the lower beam 14, and the transmission rope 60 is stretched. The second transmission wheel 50 is driven to rotate, and then the second transmission wheel 50 will further drive the first transmission wheel 30 to rotate, so that the coil spring 40 is taken up from one of the first transmission wheels 30 to the other first transmission wheel 30 to accumulate its own The elastic restoring force, on the other hand, pulls the resisting wheel 74 while the driving rope 60 is being stretched, so that the resisting wheel 74 drives the movable shaft 71 to move away from the second transmitting wheel 50, once the movable shaft 71 is guided. When the block 75 abuts against the outer ends of the fixed seat 20 and the lower guide grooves 23, 27, as shown in Fig. 3, the resistance toothed disc 76 of the resistance wheel 74 and the stopper 73 are separated from each other to make the resistance The wheel 74 can be pulled by the drive rope 60 to rotate about the movable shaft 71, and the tension spring 72 is also stretched by the guide block 75 of the movable shaft 71 to accumulate its own elastic restoring force when the curtain body 16 is unfolded to one. After the predetermined position, the pulling force applied to the lower beam 14 is released, and the tension spring 72 is pulled by its own elastic restoring force. The moving shaft 71 moves the resisting wheel 74 in the direction of the second transmission wheel 50 with the movable shaft 71. When the guide block 75 of the movable shaft 71 abuts against the inner end of the fixed seat 20 and the lower guide grooves 23, 27 As shown in FIG. 4, the resistance toothed disc 76 of the resistance wheel 74 is engaged with the stopper 73, so that the resistance wheel 74 stops rotating. At this time, the transmission rope 60 can utilize the resistance wheel 74. The frictional resistance generated between them and the elastic restoring force of the coil spring 40 are in a state of static balance, so that the curtain body 16 can be stably maintained in the unfolded state.

When the curtain 16 is to be folded, as shown in Fig. 6, first, the lower beam 14 is pushed upward to apply force to make the transmission rope 60 loose to reduce the frictional resistance with the resistance wheel 74. The elastic restoring force of the coil spring 40 forces the two first transmission wheels 30 to rotate in the opposite direction at the same time by the user's thrust. During the reverse rotation of the first transmission wheel 30, the second transmission wheel 50 is again driven to rotate. The second transmission wheel 50 starts to retract the transmission rope 60. During the winding of the transmission rope 60, the resistance wheel 74 is biased by the tension spring 72 to the movable shaft 71 and the stopper 73. They are snapped together, that is, the resistance wheel 74 is kept in a state of stopping rotation. When the curtain body 16 is released, the thrust applied to the lower beam 14 is released, so that the transmission rope 60 is again wound around the resistance wheel 74, and the elastic restoring force of the coil spring 40 is between the transmission rope 60 and the resistance wheel 74. The static friction state is again exhibited between the frictional resistances, so that the curtain body 16 is stably maintained in the collapsed state.

In summary, the curtain body positioning mechanism 10 of the present invention is mainly configured to integrate the first and second transmission wheels 30, 50 for retracting the transmission rope 60 and the resistance wheel 74 for controlling the actuation of the transmission rope 60. Together, compared with the conventional technology, the structure can be simplified and the assembly difficulty can be reduced. In addition, the frictional resistance generated between the transmission rope 60 and the resistance wheel 74 and the resistance wheel 74 and the stopper 73 can be utilized in operation. The card-locking relationship provides a good positioning effect on the curtain body 16 to effectively solve the problem of the lifting of the curtain body 16 after deployment and the sagging problem during folding, thereby achieving the purpose of increasing usability.

10‧‧‧Without drawstring curtains
12‧‧‧上梁
14‧‧‧Lower beam
16‧‧ ‧ curtain body
18‧‧ ‧ Curtain positioning mechanism
20‧‧‧ Fixed seat
21‧‧‧Upper fixing plate
22‧‧‧Upper fixed column
23‧‧‧Upper channel
24‧‧‧Upper fixing hole
25‧‧‧Under the fixed plate
26‧‧‧lower fixed column
27‧‧‧ lower guide slot
28‧‧‧Under fixing hole
30‧‧‧First transmission wheel
31‧‧‧First transmission toothed disc
32‧‧‧First transmission axle
40‧‧‧ coil spring
50‧‧‧second drive wheel
51‧‧‧Second drive toothed disc
52‧‧‧Second transmission axle
60‧‧‧ drive rope
70‧‧‧resistance unit
71‧‧‧Activity axis
72‧‧‧tension spring
73‧‧‧stops
74‧‧‧Resistance wheel
75‧‧‧ Guide block
76‧‧‧Resistive toothed disc
77‧‧‧Resistance axle

Figure 1 is a perspective assembled view of the present invention. Figure 2 is an exploded perspective view of the present invention. Fig. 3 is a partial plan view of the present invention, mainly showing a state in which the resistance wheel and the stopper are separated from each other. Fig. 4 is a partial plan view of the present invention, mainly showing a state in which the resistance wheel and the stopper are engaged with each other. Figure 5 is a front view of the invention as it unfolds the curtain. Figure 6 is a front view of the present invention when the curtain is folded.

18‧‧ ‧ Curtain positioning mechanism

20‧‧‧ Fixed seat

21‧‧‧Upper fixing plate

22‧‧‧Upper fixed column

23‧‧‧Upper channel

24‧‧‧Upper fixing hole

25‧‧‧Under the fixed plate

26‧‧‧lower fixed column

27‧‧‧ lower guide slot

28‧‧‧Under fixing hole

30‧‧‧First transmission wheel

31‧‧‧First transmission toothed disc

32‧‧‧First transmission axle

40‧‧‧ coil spring

50‧‧‧second drive wheel

51‧‧‧Second drive toothed disc

52‧‧‧Second transmission axle

60‧‧‧ drive rope

70‧‧‧resistance unit

71‧‧‧Activity axis

72‧‧‧tension spring

73‧‧‧stops

74‧‧‧Resistance wheel

75‧‧‧ Guide block

76‧‧‧Resistive toothed disc

77‧‧‧Resistance axle

Claims (5)

The utility model relates to a curtain body positioning mechanism without a drawstring curtain, comprising: a fixing seat, the two ends of the fixing seat respectively have an upper guiding groove and a lower guiding groove, wherein the upper and lower guiding grooves correspond to each other; a wheel rotatably disposed on the fixing seat and meshed with each other; a coil spring connecting the two first transmission wheels and optionally winding one of the two first transmission wheels; a wheel rotatably disposed on the fixing seat and respectively engaging a first transmission wheel; two transmission ropes, one end of each of the transmission ropes is connected to the second transmission wheel; and a resistance unit having two movable axes, at least a tension spring, a second stop, and a second resistance wheel, wherein the top and bottom ends of each of the movable shafts are movably embedded in the lower seat and the lower guide groove, and the tension spring connects the two movable shafts. Each of the blocking members is disposed between the second transmission wheel and the movable shaft, and each of the resistance wheels is rotatably sleeved on a movable shaft and surrounded by a transmission rope, so that Each of the resistance wheels can be coupled to the stopper by the pulling force of the transmission rope And can be isolated by the elastic restoring force of the tension spring and the stop member with each snap. The curtain body positioning mechanism of the cordless curtain according to claim 1, wherein each of the top and bottom ends of each of the movable shafts respectively has a guide block, and the two guide blocks are respectively embedded on the fixed seat and the lower guide. In the slot, the length of each of the guiding blocks is smaller than the length of the upper and lower guiding grooves. The curtain body positioning mechanism of the cordless curtain according to claim 2, wherein the number of the tension springs is two, and the two tension springs are respectively connected between the guide blocks of the two movable shafts. The curtain body positioning mechanism of the cordless curtain according to claim 1, wherein the stopper is a rod, each of the resistance wheels has a second resistance toothed disc and a movable shaft connecting the two resistance toothed discs, the two The resistance sprocket is detachably engaged with the stopper, and the movable shaft is surrounded by the transmission rope. The curtain body positioning mechanism of the cordless curtain according to claim 4, wherein the two ends of the fixing seat respectively have an upper fixing hole and a lower fixing hole, and the upper and lower fixing holes correspond to each other, the stopper The top and bottom ends are respectively inserted and fixed in the upper and lower fixing holes.