TWI654365B - Pull-free blinds outer friction retracting structure - Google Patents

Abstract

The invention discloses an outer friction retracting structure without a cord blind, comprising a lower cover, a driving gear, a driven gear, a scroll spring, a two-drawing gear, a two-way resistance wheel, and an upper cover, wherein the one-way resistance wheel can be pivoted The ground cover is disposed on the lower cover and is respectively disposed adjacent to the two rope pulleys. Each of the one-way resistance wheels is provided with a resistance block and an elastic component, the resistance block has a polygonal perforation, one end of the elastic component is fixed on the resistance block, and the two pull ropes are respectively fixed. At the two drawstring gears, the two drawstrings are respectively wound around at least one turn around the outer side of the one-way resistance wheel; the upper cover is detachably covered with the lower cover, and the drive gear, the driven gear, the scroll spring, and the one-way resistance are respectively The wheel is sandwiched therebetween, and the upper cover is provided with two polygonal protrusions, which are disposed corresponding to the polygonal holes.

Description

Pull-free blinds outer friction retracting structure

The present invention relates to the field of curtains, and more particularly to a cordless blinds outer friction retracting structure.

The friction structure used in the conventional cordless blinds can be referred to, for example, U.S. Patent No. 9,366,077 (hereinafter referred to as the first prior) and US Pat. No. 9,482,049 (the second prior), wherein the resistance wheel of the first predecessor is The resistance shrapnel is applied to the resistance shrapnel and the one-way claw member (pawl) disposed outside the resistance wheel; and the second front case is disposed in the resistance wheel for the planetary gear structure.

The structure of the first prior case is that the resistance elastic piece and the one-way claw piece are disposed outside the resistance wheel, which causes the overall structure to become large, thereby affecting the space of the device in the upper rail, and the friction force is difficult to stably control; Although the planetary gear structure of the previous case is disposed in the resistance wheel, the assembly thereof is difficult, and the friction force is difficult to stably control.

The invention provides an outer friction retracting structure of the cordless blinds, which provides a relatively stable friction force, prevents the curtain from sliding at the highest point, and prevents the curtain from rebounding at the lowest point.

The present invention provides a cordless blinds outer friction retracting structure, comprising a lower cover; a driving gear pivotally disposed on the lower cover; a driven gear pivotally disposed on the lower cover, And engaging with the driving gear; a scroll spring is disposed around the outer circumference of the driven gear, two ends of the scroll spring are respectively fixed at the driving gear and the driven gear; and two pulling rope gears are pivotable Positioned on the lower cover, the two cable gears respectively mesh with the driving gear and the driven gear; two unidirectional resistance wheels are pivotally disposed on the lower cover, the two The one-way resistance wheel is respectively disposed adjacent to the two rope pulleys. Each of the one-way resistance wheels is provided with a resistance block and an elastic component. The resistance block is disposed in the one-way resistance wheel, and the elastic component is disposed on the single In the resistance wheel, the resistance block has a polygonal perforation, and one end of the elastic component is fixed to the resistance block, and the two drawstrings are respectively fixed at the two drawstring gears, and the two drawstrings respectively wind the two At least one turn to the outer circumference of the resistance wheel; and an upper cover detachably covering the lower cover, and each of the pull gear, the drive gear, the driven gear, the scroll spring, and the one-way resistance wheel And being disposed between the upper cover and the lower cover, the upper cover is provided with two polygonal protrusions, corresponding to the corresponding polygonal holes of the two one-way resistance wheels, and the polygonal protrusions can be correspondingly disposed Each of the polygons is perforated.

In some embodiments, the resistance block is a C-type resistance block, and the elastic component is a compression spring disposed at an open end of the C-type resistance block.

In some embodiments, the resistance block is a ring-shaped resistance block having a groove around the outer circumference of the annular resistance block, and the elastic component is a ring-shaped elastic piece, and one end of the annular elastic piece is clamped to the ring-shaped resistance block. The groove is formed, and the other end of the annular elastic piece extends in the counterclockwise direction and contacts the inner circumference of the one-way resistance wheel.

In some embodiments, the resistance block includes a ring-shaped resistance block having an outer circumference of angularly spaced three slots, the elastic component being three arcuate spring pieces, each of the slots clamping each of the arcs One end of the shaped elastic piece, the other end of each of the curved elastic pieces extends in a counterclockwise direction and contacts the inner circumference of the one-way resistance wheel.

100‧‧‧Without drawstring blinds

200‧‧‧ external friction retracting structure

1‧‧‧Lower rail

2‧‧‧lower rail

3‧‧‧ leaves

4‧‧‧Ladder

5‧‧‧Drawstring

6‧‧‧Upper track

7‧‧‧ Roller seat

8‧‧‧Roller

9‧‧‧Rolling resistance wheel

10‧‧‧Resistance wheel core

11‧‧‧Drawing wire core

12‧‧‧ Ohm

13‧‧‧Double flat iron bars

14‧‧‧ rotating stick

15‧‧‧Under the cover

16‧‧‧Drawstring gear

17‧‧‧Drive gear

18‧‧‧passive gear

19‧‧‧Spring axle

20‧‧‧ Scroll spring

21‧‧‧ Pull rope to adjust the core

22‧‧‧Upper cover

23‧‧‧fixed pin

24‧‧‧ fixing screws

25‧‧‧One-way resistance wheel

26‧‧‧resistance block

261‧‧‧Polygonal perforation

27‧‧‧Flexible components

28‧‧‧Locking screws

29‧‧‧Polygonal stud

30‧‧‧ring type resistance block

301‧‧‧ slotting

302‧‧‧Polygonal perforation

31‧‧‧ ring shrapnel

32‧‧‧ring type resistance block

321‧‧‧ slotting

322‧‧‧Polygonal perforation

33‧‧‧Shaft shrapnel

Fig. 1 is a partially exploded perspective view showing the cordless blind of the present invention.

Figure 2 is a plan perspective view showing the cordless blind of the present invention.

Fig. 3 is an exploded perspective view showing a first embodiment of a one-way resistance wheel in the outer friction-retracting structure of the cordless blind of the present invention.

4 is a schematic exploded view showing only the upper cover, the lower cover, and the two one-way resistance wheels in the first embodiment of the one-way resistance wheel in the outer friction-retracting structure of the cordless blinds of the present invention.

Figure 5 is a view showing the outer friction-retracting structure of the cordless blind of the present invention. A schematic view of the first embodiment of a one-way resistance wheel.

Figure 6 is a plan view showing the first embodiment of the cordless blinds outer friction retracting structure of the present invention in a tensioned state.

Figure 7 is a plan view showing the first embodiment in a released state of the outer friction-free retracting structure of the cordless blind of the present invention.

Fig. 8 is a partial plan view showing the left side of Fig. 6.

Fig. 9 is a partial plan view showing the left side of Fig. 7.

Figure 10 is a schematic view showing a second embodiment of the one-way resistance wheel in the outer friction-retracting structure of the cordless blind of the present invention.

Figure 11 is a plan view showing the second embodiment of the cordless blinds outer friction retracting structure of the present invention in a released state.

Fig. 12 is a partial plan view showing the left side of Fig. 11.

Figure 13 is a view showing a third embodiment of the one-way resistance wheel in the outer friction-retracting structure of the cordless blind of the present invention.

Figure 14 is a plan view showing the third embodiment of the cordless blinds outer friction retracting structure of the present invention in a released state.

Fig. 15 is a partial plan view showing the left side of Fig. 14.

Referring to FIGS. 1 to 15 together, the cordless blind 100 of the present invention includes the upper rail 6, the lower rail 1, the two sets of ladder belts 4, a plurality of blades 3, two drawstrings 5, and an ohm. 12, a rotating rod 14, two roller seats 7, two rollers 8, two roller resistance wheels 9, and two lower rails 2, the cordless blinds outer friction retracting structure 200 of the present invention is installed in the upper rail 6 a plurality of blades 3 are stacked on each other, and the upper rails 6 are provided with double flat iron bars 13 which are sleeved in the upper rails 6 and which respectively correspond to the cordless louvers of the present invention. The two ends of the curtain outer friction retracting structure 200 are spaced apart, and the rollers 8 are sleeved on the double flat iron bars 13 in the corresponding roller seats 7, and each roller seat 7 is further provided with a cable guiding iron core 11 and a The resistance wheel core 10, the resistance wheel core 10 is used in combination with the corresponding roller 8, and the two drawstrings 5 are respectively connected to the two ends of the cordless blinds outer friction retracting structure 200 of the present invention, and the drawstrings 5 are outwardly And extending toward the corresponding roller seat 7, After passing the roller 8 of the corresponding roller seat 7, the rope guiding core 11 and passing the upper rail 6 downward, and then passing through the plurality of blades 3 to the lower rail 1, and finally using the corresponding lower rail 2 The fixing is carried out, and the two sets of ladder belts 4 are respectively arranged corresponding to the two drawstrings 5, the ohms 12 sets the double flat iron bars 13 disposed in the upper rail 6, and the rotating rod 14 is connected with the ohmic 12 to control the double flat iron bars 13 to rotate. In order to control the two sets of the ladder belts 4, the turning of the blades 3 is controlled. The above structure is a conventional structure except for the outer structure of the frictionless retracting structure 200 of the cordless blinds of the present invention, and therefore will not be described again.

Please refer to FIG. 3 to FIG. 9 , which is a first embodiment of the cordless blinds outer friction retracting structure 200 of the present invention, including a lower cover 15 , a driving gear 17 , a driven gear 18 , and a vortex The coil spring 20, the two-rope gear 16, the two-way resistance wheel 25, and an upper cover 22.

The drive gear 17 is pivotally disposed on the lower cover 15.

The driven gear 18 is pivotally disposed on the lower cover 15 and intermeshes with the drive gear 17.

The scroll spring 20 is disposed around the outer periphery of the driven gear 18, and the two ends of the scroll spring 20 are respectively fixed at the driving gear 17 and the driven gear 18; wherein the driven gear 18 is pivotally coupled with a spring wheel axle 19, The scroll spring 20 is wound around the spring hub 19.

The two cable gears 16 are pivotally disposed on the lower cover 15, and the two cable gears 16 are in mesh with the drive gear 17 and the driven gear 18, respectively.

The two-way resistance wheel 25 is pivotally disposed on the lower cover 15, and the two one-way resistance wheels 25 are respectively disposed adjacent to the two rope pulleys 16, and each of the one-way resistance wheels 25 is hollow, and a resistance block 26 is disposed therein. An elastic assembly 27, the resistance block 26 is disposed in the one-way resistance wheel 25 (the outer diameter of the resistance block 26 is approximately equal to the inner diameter of the one-way resistance wheel 25), and the elastic assembly 27 is disposed in the one-way resistance wheel 25, in the present embodiment In the example, the resistance block 26 is a C-type, and the elastic member 27 is a compression spring disposed at an open end of the C-type resistance block 26.

The C-type resistance block 26 has a polygonal perforation 261 (such as a square perforation), and the two drawstrings 5 are respectively fixed at the two drawstring gears 16, and the two drawstrings 5 are respectively wound around at least one of the outer circumferences of the two one-way resistance wheels 25. The two ends of the lower cover 15 respectively protrude upwardly with a pull cord adjusting iron core 21 for adjusting the position of each pull cord 5 to be calibrated.

The upper cover 22 is detachably covered with the lower cover 15, that is, the pins 23 can be fixed to each other In combination, the fixing screws 24 are used for fixing, and the plurality of locking screws 28 are correspondingly locked and fixed corresponding to the respective pulling rope gears 16, the driving gear 17, the driven gear 18, and the one-way resistance wheels 25, and the pulling ropes are respectively The gear 16, the driving gear 17, the driven gear 18, the spiral spring 20, and the one-way resistance wheel 25 are sandwiched between the upper cover 22 and the lower cover 15, and the upper cover 22 is provided with two polygonal protrusions 29 (such as square protrusions). Corresponding to each of the polygonal perforations 261 corresponding to the two one-way resistance wheels, each of the polygonal protrusions 29 can be disposed on the corresponding polygonal perforations 261 to fix the resistance block 26 to avoid rotation.

When the frictionless retracting structure 200 of the cordless blind 100 of the present invention is manufactured, the scroll spring 20 having a sufficiently large elastic force is selected so that the cordless blind 100 can be kept from falling when it is completely stowed.

Referring to FIGS. 6 to 15 , during the gradual unfolding of the cordless blind 100, the cordless blind 100 is pulled down by an external force, and the elastic component (compression spring 27) is only "slightly" compressed. The friction between the C-type resistance block 26 and the one-way resistance wheel 25 is made small, so that the one-way resistance wheel 25 can be rotated in synchronization with the cord 5 that is not intertwined thereon, so that the blind 100 can be easily deployed by the user.

Since the weight of the blade 3 of the cordless blind 100 is gradually shared by the ladder belt 4, the weight of the cordless blind 100 is gradually reduced, and when the cordless blind 100 is fully deployed, the downward gravity is only the lower rail 1 The weight of the scroll spring 20 may rebound, causing the cordless blind 100 to be stowed up (ie, rebounded). At this time, friction between the C-shaped resistance block 26 and the one-way resistance wheel 25 is generated, resulting in a single The resistance to the rotation of the resistance wheel 25, the one-way resistance wheel 25 cannot be rotated, the frictional force between the one-way resistance wheel 25 and the drawstring 5 is increased, and the drawstring 5 is obstructed in the outer friction-retracting structure 200 of the present invention. , to prevent the rebound of the cordless blinds 100.

While the foregoing is directed to the various embodiments of the present invention, further or further embodiments of the present invention may be devised without departing from the basic scope thereof, and the basic scope thereof is defined by the following claims. Although the present invention has been explained in connection with the preferred embodiments, it is not intended to limit the invention. It should be noted that many other similar embodiments can be constructed in accordance with the teachings of the present invention, which are within the scope of the present invention.

Claims (5)

An outer friction retracting structure for a cordless blinds, comprising: a lower cover; a driving gear pivotally disposed on the lower cover; a driven gear pivotally disposed on the lower cover, and the The driving gears are meshed with each other; a scroll spring is disposed around the outer circumference of the driven gear, and two ends of the scroll spring are respectively fixed at the driving gear and the driven gear; and two pulling rope gears are pivotally disposed at On the lower cover, the two cable gears respectively mesh with the driving gear and the driven gear; two unidirectional resistance wheels are pivotally disposed on the lower cover, and the two one-way resistance wheels respectively The sheaves are disposed adjacent to each other, and each of the one-way resistance wheels is provided with a resistance block and a resilient component, the resistance block has a polygonal perforation, and one end of the elastic component is fixed to the resistance block, and the two drawstrings are respectively fixed on the Two drawstring gears, and the two drawstrings are respectively wound around the outer circumference of the two one-way resistance wheels at least one turn; and an upper cover detachably covers the lower cover, and each of the drawstring gears, the active Gear, the driven gear, the vortex a spring, each of the one-way resistance wheels is interposed between the upper cover and the lower cover, the upper cover is provided with two polygonal protrusions, corresponding to the corresponding polygonal holes of the two one-way resistance wheels, each of the polygons The studs can be threaded through the corresponding perforations of the polygons. The cordless blinds outer friction retracting structure according to claim 1, wherein the resistance block is a C-type resistance block, and the elastic component is a compression spring, and the compression spring is disposed at the C-type resistance An open end of the block. The outer friction-retracting structure of the cordless blinds according to claim 1, wherein the resistance block is a ring-shaped resistance block, and the outer circumference of the annular resistance block has a groove, and the elastic component is a ring-shaped elastic piece. One end of the annular elastic piece is clamped to the slit of the annular resistance block, and the other end of the annular elastic piece extends in a counterclockwise direction and contacts the inner circumference of the one-way resistance wheel. The cordless blinds outer friction retracting structure according to claim 1, wherein the resistance block comprises a ring-shaped resistance block, and the outer circumference of the annular resistance block has an angle between The three elastic slots are three arc-shaped elastic pieces, each of which clamps one end of each of the curved elastic pieces, and the other end of each of the curved elastic pieces extends in a counterclockwise direction and contacts the one-way resistance wheel. Inside the surroundings. The pull cordless blind outer friction retracting structure according to claim 1, wherein the driven gear is pivotally coupled to a spring axle, and the scroll spring is wound around the spring axle.