WO2014178465A1 - Free falling type slim roll blind for preventing child accident - Google Patents

Abstract

The present invention relates to a roll blind apparatus which stores a blind fabric by winding the blind fabric on a winding rod, or is used to shield light by unwinding the blind fabric from the winding rod, the roll blind apparatus comprising: a housing disposed, at the upper portion of the winding rod on which the blind fabric is wound, in parallel to the winding rod; a raising portion for raising the blind fabric by rotating the winding rod by pulling a raising string; a returning portion for returning the raising string to an original location thereof; a lowering portion for lowering the blind fabric by pulling a lowering string; and a connection portion for transferring powers of both the raising portion and the lowering portion to the winding rod. According to the present invention, the roll blind apparatus has a structure in which the two strings are used, so that an indoor accident related to a pulling string can be completely prevented beforehand, and need not use a chain pulley conventionally used at the lateral side of the roll blind apparatus, so that an interval between components at the lateral side is minimized, thereby minimizing introduction of light from the outside when the roll blind apparatus is installed.

Description

Free Fall Slim Roll Blinds for Child Safety

The present invention relates to a roll blind device that can block the inflow of sunlight through a window and prevent exposure of indoor privacy. More specifically, the present invention relates to a roll belt device having a strap for lifting and lowering the blind fabric. After the rising string of the blind fabric is pulled to the lower side, the returning operation is automatically performed so that the blind fabric can be easily raised continuously, and when the descending string of the blind fabric is pulled to the lower side, It is possible to descend, and at the same time, it is very convenient to use as it is possible to freely adjust the descending speed by adjusting the pulling force of the descending strap, and to minimize light leakage from the outside by minimizing the gap between parts on the side of the roll blind. Improved, free-fall slim to prevent child safety accidents Type roll blinds.

In general, roll blinds are installed in windows of various buildings, and are used as means for preventing light from outside, controlling lighting in a room, or invading privacy in a room.

Such roll blinds typically have one or a plurality of blind fabrics installed in the horizontal direction, which are rolled up on the upper winding rods and stored or rolled up from the winding rods to prevent windows.

Such conventional roll blinds are provided with a driving bracket and a driven bracket on both sides of a frame fixed to a wall, etc., between each of the brackets, a pipe-shaped winding rod is rotatably mounted, and a blind fabric is wound around the winding rod. At the lower end, the weight is fixed so that the blind fabric is unloaded downward from the winding rod by the weight of the weight.

And the inside of the drive bracket is provided with a chain pulley which is integrally connected to the winding rod is rotated, such a pulley is wound around the pulley is pulled on one side of the pull string such that the winding rod is rotated through the chain pulley, blind The fabric is wound up on a winding rod.

In addition, when the other side of the pull string is pulled, the chain pulley is rotated in the opposite direction while the winding rod is rotated in the opposite direction so that the blind fabric is released from the winding rod and lowered.

On the other hand, the pull string used to operate the user to roll up or down the blind fabric as described above is an endless track type, wound on the chain pulley, the lower end of which is long down. Thus, such a pull string can cause a very dangerous situation.

In order to fundamentally prevent such a problem, there is a serious demand in the art for technology development that separates the lower end of a conventional pulling string that is stretched into an endless track, shortens its length, and places it at a height that cannot be reached by children. It was a situation.

The technique which effectively solved such a problem was made by the "roll blind with a noiseless two-way clutch" of Korean Patent Application No. 2011-0122135 proposed by the applicant of the present invention.

This prior art separates the lower end of the pulling string which raises and lowers the blind fabric, and shortens the length of the cord so that the blind fabric can be moved up and down smoothly even when placed in a high position out of reach of young children. Regarding the use of the system, it has been improved to completely prevent indoor safety accidents.

In addition, one side of the safety strap with the bottom separated is used as a descending strap for lowering the blind fabric, and the other side is used as a rising strap for pulling the blind fabric, and once the lowering strap or one side of the climbing strap is pulled downward through the bidirectional clutch, By automatically returning the strap to its original position, the user can easily lower and lower the blind fabric continuously by using the lowering strap or the rising strap and improved the convenience of use.

However, such a conventional technology is provided with a chain pulley that is operated by hanging the falling string and the rising string, so that the width is structurally formed on the chain pulley component side, through which the external light is partially leaked into the room Occurred.

That is, in the conventional technology, the descending string and the rising string are composed of one chain string, and the chain pulley on which the chain string is caught is used for the stability of operation, thereby improving its operational stability and convenience in use. The unexpected problem that some light is introduced into the room through the space between the pulleys is generated.

In addition, such a conventional structure is that when the operation of the lowering of the blind fabric, the blind fabric is pulled down by pulling the descending strap several times in sequence, so that when the user wants to lower the blind fabric quickly, the lowering of the blind fabric There was a hassle to pull the string. In addition, the user also has a problem that it is difficult to freely adjust the falling speed in adjusting the falling speed of the blind fabric.

An object of the present invention is to solve the conventional problems as described above, can be completely prevented in advance the indoor safety accident associated with the pull string through the two-line structure in relation to the use of the roll blind, the side of the roll blind Free fall-type slim roll blinds to prevent child safety accidents, improved to minimize the leakage of light from the outside when installing roll blinds by replacing the use of chain pulleys in In providing.

And another object of the present invention, when the user is lowering the blind fabric, when the user pulls down the lower strap, it is possible to rapidly descend by the weight of the blind fabric, the user can freely control the descending speed by adjusting the pulling force of the lower strap The present invention provides a free-fall slim roll blind for preventing child safety accidents, which has been improved to obtain convenience in use.

In order to achieve the above object, the present invention, in the roll blind device that the blind fabric is wound around the winding rod, or released from the winding rod to be used for shading,

A housing disposed side by side with the winding rod on the upper side of the winding rod to which the blind fabric is wound;

The lifting pulley is formed on one side of the inner side of the housing, the lifting pulley is wound on one side, the side ratchet is connected to the side through the first one-way ratchet coupling, the side ratchet is connected to enable the power transmission to the winding rods An upward actuating unit for raising the blind fabric by the rotation of the winding rod by a pulling operation of the upward strap;

And a return spring connected to the lift pulley on the side opposite to the side ratchet of the lift operation portion, and when the lift pulley is pulled and the lift pulley rotates, the torsion restoring force is accumulated, and when the pulled state of the lift strap is released, A return operation unit which reversely rotates the lift pulley and lifts the lift strap back to its original position;

The other end of the housing has a lowering lever is fixed to the lower end of the lower lever, and the other end of the lower lever is connected to the brake spring to control the rotation of the winding rod, when the lowering string is pulled, the brake release of the brake spring Falling operation is made by the fall made of the blind fabric; And

And a connecting portion having a main shaft rotatably mounted with respect to the housing, the connecting portion having a first gear connected to one end of the main shaft and a second gear connected to one end of the winding rod. When pulled, it can automatically return to the original position, so that the blind fabric can be continuously raised, and when the descending string is pulled to the lower side, it can be lowered by the weight of the blind fabric, and at the same time, the lowering speed can be adjusted by adjusting the pulling force of the descending string. It provides a free fall slim roll blind for preventing child safety accident, characterized in that it is configured to be freely adjustable.

According to the free-fall type slim roll blinds for preventing child safety accidents according to the present invention, the conventional pulling string is divided into a rising string and a falling string, and when the rising string is pulled to the lower side, the rising edge of the blind fabric is automatically raised. The in-situ return operation of the string can be made to continuously raise the blind fabric.

In addition, when the lowering string is pulled to the lower side, the brake spring is released and the rapid lowering is possible by the weight of the blind fabric, and at the same time configured to enable the free adjustment of the lowering speed by adjusting the pulling force of the lowering string.

Therefore, according to the free-fall-type slim roll blind for preventing child safety accidents of the present invention, it is possible to completely prevent the indoor safety accident related to the pull string through the two-row structure in connection with the use of the roll blind.

In addition, it is possible to minimize the gap between the side parts by replacing the use of a chain pulley that has been conventionally used on the side of the roll blind, thereby minimizing light leakage from the outside during installation of the roll blind.

And, according to the present invention, when the user pulls down the lower strap when the blind fabric is lowered, it is possible to rapidly descend by the weight of the blind fabric, the user can freely adjust the lowering speed by adjusting the pulling force of the lower strap By doing so, the user can use the blind fabric very conveniently.

1 is a side cross-sectional view showing a free-fall slim roll blind for preventing a child safety accident of the present invention.

Figure 2 is an exploded perspective view showing a free-fall slim roll blind for preventing child safety accidents of the present invention.

Figure 3 is a cross-sectional view showing a free-fall slim roll blinds for the prevention of child safety accidents of the present invention.

Figure 4a is a side cross-sectional view of the lifting pulley, side ratchet and the first one-way ratchet provided in the free-fall slim roll blind for preventing child safety accident of the present invention.

Figure 4b is a side cross-sectional view of the brake shaft, the brake ratchet and the second one-way ratchet provided in the free-fall slim roll blind of the present invention.

Figure 5a is a side view of the combination of the lifting pulley, guide pulley and the lifting strap provided in the free-fall slim roll blind of the present invention.

Figure 5b is a side view of the combination of the square main shaft, the first and second gear provided in the free-fall slim roll blind for preventing child safety accidents of the present invention.

Figure 6a is a side view coupling of the lowering lever, lowering straps, hinges and support springs provided in the free-fall slim roll blind for preventing child safety accidents of the present invention.

Figure 6b is a side view of the combination of the second and second annular member, the brake spring, the brake rotation shaft provided in the free-fall slim roll blind for preventing child safety accident of the present invention.

Figure 7 is a detailed structural diagram of the second and second annular member, the lower lever provided in the free-fall slim roll blind for preventing child safety accident of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Free fall-type slim roll blind 100 for preventing child safety accidents according to the present invention, as shown in Figure 1, wound the blind fabric 102 wound around the winding rod 104, or winding rod 104 It is a device intended to be used for shading by releasing from the

The winding rod 104 has a cylindrical structure, each end of which is inserted into the fitting hole 104a, and is a conventional structure in which the blind fabric 102 is wound around the winding rod 104.

The free fall type slim roll blind 100 for preventing child safety accident according to the present invention includes a housing disposed in parallel with the winding rod 104 on the upper side of the winding rod 104 on which the blind fabric 102 is wound. 110).

As shown in detail in the exploded view in FIG. 2, the housing 110 has a rectangular cylindrical shape having a hollow space therein, and the first and second covers 114a and 114b are coupled through a plurality of screws 112. And is integrally connected to the upper side of the winding rod 104 via the side plate 116.

The housing 110 is provided with a lifting operation unit 120 for achieving the rise of the blind fabric 102 on one side thereof.

As shown in detail in FIG. 3 and FIG. 4A, the lifting operation part 120 forms a rising pulley 124 on one side of which the lifting string 122 is wound inside the housing 110, and at the side thereof. The side ratchet 126 is connected through the first one-way ratchet 130 is coupled.

In addition, the side ratchet 126 is connected to allow the power transmission to the winding rod 104 wound the blind fabric 102 to achieve the rotation of the winding rod 104 by the pulling operation of the lifting strap 122, blind The fabric 102 is configured to be raised.

The rising operation unit 120 is such that the flat strap-shaped lifting straps 122 are wound on the pulley 124. Such a lifting strap 122 has a flat belt-like structure, thereby increasing the pulley ( Even if the long length is wound around 124, the diameter can be prevented from being greatly expanded, which is useful.

In addition, as shown in FIG. 5A, the lifting straps 122 are moved outwardly of the housing 110 through guide pulleys 128 rotatably mounted to the housing 110 at one side of the lifting pulley 124. Extending, this guide pulley 128 allows the lifting straps 122 to rise and fall smoothly without friction with respect to the housing 110.

In addition, the upward actuating part 120 is inserted into the inner diameter part 124a of the lifting pulley 124 so as to be rotatable to the outer diameter part 126a of the side ratchet 126, and the side ratchet 126 is The inner diameter portion 126b is fitted to the square main shaft 182 to be described later, and rotates together integrally.

That is, the lift pulley 124 is rotatable on the side ratchet 126, the side ratchet 126 is a structure that is rotated with the square main shaft 182.

In addition, the side ratchet 126 is in close contact with the lifting pulley 124 by the first pushing spring 134 located on the opposite side of the lifting pulley 124, as shown in FIG. 130 are coupled to each other.

The first one-way ratchet 130 rotates the side ratchet 126 simultaneously in the forward direction through the first one-way ratchet 130 when the pulley 124 rotates in the forward direction by pulling the lifting strap 122. Is connected to.

In this forward rotation, the side ratchet 126 is wound around the winding rod 104 by rotating the square main shaft 182 through the first and second gears 202 and 204 of the connecting portion 200 described later. The blind fabric 102 is raised.

In addition, the free fall type slim roll blind 100 for preventing child safety accidents according to the present invention, the lifting strap 122 is lifted back to the original position on the opposite side of the side ratchet 126 of the lifting operation unit 120 And a return actuator 140.

As shown in FIGS. 1 and 3, the return operation unit 140 includes a return spring 142 connected to the lift pulley 124, and the lift strap 122 is pulled to lift the pulley 124. When to rotate to accumulate the torsional restoring force, and when the pulled state of the lifting string 122 is released to reverse rotation of the lifting pulley 124 by using the torsional restoring force.

That is, the return operation unit 140 is one end of the return spring 142 made of a torsion spring is connected to the lifting pulley 124, the other end of the return spring 142 is the inner wall of the housing 110 It is an integrally fixed structure (see FIG. 3).

Therefore, when the lifting pulley 124 is pulled and the lifting pulley 124 rotates, the return spring 142 accumulates the torsion restoring force, and when the pulled state of the lift cord 122 is released, the torsion restoring force is used. Reverse lift pulley 124 is rotated.

In this reverse rotation, the first one-way ratchet 130 is raised pulley 124 in a state in which the side ratchet 126 is stopped by contact between the inclined surfaces between the lift pulley 124 and the side ratchet 126. ) Only reverses and lifts the lift strap 122 back to its original position.

In addition, the free fall-type slim roll blind 100 for preventing child safety accident according to the present invention, the lower operation unit 150 is adjustable to make the descending of the blind fabric 102 in the other side of the housing 110. It is provided.

As shown in FIGS. 3, 6A, and 7, the lowering operation unit 150 includes a lowering lever 154 having a lowering strap 152 fixed to one end thereof.

The other end of the lowering lever 154 is connected to the brake spring 156 for intermittent rotation of the winding rod 104, and when the lowering string 152 is pulled, the brake spring 156 is released. To allow the rotation of the take-up rod 104 through the built-in second one-way ratchet 160, the blind fabric 102 operates to be lowered.

That is, as shown in Figure 3, the lower operation unit 150, one end of the lower lever 154 is connected to the inner surface of the housing 110 to be rotatable about the hinge 154a, the lower lever A support spring 154b is provided at the center lower portion of 154 to elastically support the lower lever 154 to the upper side with respect to the bottom surface of the housing 110 (see FIG. 6A).

The lower lever 154 is closely connected to the brake lever 170 whose hinge side end 154d is configured to operate the brake spring 156, and an end opposite the hinge 154a of the lower lever 154 A hole 154c is formed so that the lower strap 152 having one end fixed to the bottom surface of the housing 110 through the knot 152a passes through the hole 154c and passes through the bottom surface of the housing 110. It extends to the bottom of the housing 110.

In this structure, the descending string 152 may be formed as a general string having a round cross section, unlike the rising string 122.

Such a lower operation unit 150 is a user pulls the lower strap 152 to the lower side, the lower strap 152 while pressing the support spring 154b to the lower rotation of the lower lever 154 around the hinge 152a. This causes the hinge side end 154d to rise.

The hinge end portion 154d of the lowering lever 154 opens the brake spring 156 through the brake lever 170 which will be described in detail later, and releases the brake to allow the winding rod 104 to rotate. The lowering of the blind fabric 102 is made.

However, when the pulling operation of the lowering string 152 is released, the lower end of the hinge side end 154d is caused by the downward rotation of the lowering lever 154 around the hinge 152a through the restoring force of the support spring 154b. As it descends, the brake spring 156 is locked through the brake lever 170 to block rotation of the winding rod 104 to stop the blind fabric 102 from descending.

In the lowering operation unit 150 as described above, the brake lever 170 is a protrusion 172a to enable power transfer to the hinge side end 154d of the lower lever 154, as shown in detail in FIG. Is connected to the first annular member 172 and the first annular member 172, and the second annular member has an arm 176a connected to one end of the brake spring 156. Member 176.

The first and second annular members 172 and 176 are configured to be coupled to the spline 174. Such spline 174 coupling is used to adjust the engagement angle of the second annular member 176 to the first annular member 172. As a result, the angle θ of the arm 176a of the second annular member 176 is connected to the end of the brake spring 156.

The engagement angle adjustment of the second annular member 176 with respect to the first annular member 172 is convenient because it can appropriately accommodate the brake angle (θ) changed in accordance with the standard variation of the brake spring 156.

That is, the brake spring 156 is a conventional structure for controlling the lowering of the blind fabric 102 in the conventional roll blind device, as shown in detail in Figure 3, one end 156a is the housing 110 It is fixed to the inner wall of the other end 156b is in close contact with the arm 176a of the second annular member 176 is connected to perform the locking and unlocking operation.

This conventional brake spring 156 has an angle between one end 156a fixed to the inner wall of the housing 110 and the other end 156b in contact with the arm 176a of the second annular member 176. [theta] is maintained at the normal 110 degrees, and may be formed at different angles [theta] according to the specification.

As shown in FIG. 6B, when the brake spring 156 is rotated so that the other end 156b approaches the one end 156a, the brake spring 156 releases the lock state of the brake rotation shaft 180 located therein. Let's do it.

In general, however, the angle θ between the one end 156a and the other end 156b is maintained as it is to always keep the brake rotation shaft 180 located inside thereof locked.

Therefore, the adjustment of the engagement angle of the second annular member 176 with respect to the first annular member 172 is changed in accordance with the variation of the specification of the brake spring 156 when mass production of roll blinds 100 of various specifications is performed. The brake angle θ of the brake spring 156 can be accommodated through appropriate arrangement of the first and second annular members 172, 176 and can be used universally for convenience.

In addition, such a brake spring 156 has a cylindrical brake rotation shaft 180 rotatably connected to the rectangular main shaft 182 through the first bushing 184 therein, and the brake rotation shaft 180 The brake ratchet 186 is provided inside.

The brake rotation shaft 180 is rotatably mounted to the square main shaft 182 through the first bushing 184, and the brake ratchet 186 is connected to the brake rotation shaft 180 by the second pushing spring 188. The second one-way ratchet 160 is pushed in between.

As shown in FIG. 3, the second pushing spring 188 which closely contacts the brake ratchet 186 to the brake rotation shaft 180 has a second bushing 192 having one end thereof fitted into the square main shaft 182. The other end is connected to the brake ratchet 186 and configured to always push the brake ratchet 186 to the brake rotation shaft 180 to be coupled to the second one-way ratchet 160.

The second one-way ratchet 160 positioned at the coupling surface of the brake rotation shaft 180 and the brake ratchet 186 is rotated by the pull pulley 124 by the pulling operation of the lifting strap 122, so that the brake ratchet 186 Only allow rotation.

That is, since the brake spring 156 typically maintains the brake rotation shaft 180 in a locked state, when the lifting pulley 124 rotates and the square main shaft 182 rotates through the side ratchet 126, the brake spring 156 rotates. The brake ratchet 186 rotates through the main shaft 182, and the brake ratchet 186 rotates through the inclined surface coupling with respect to the brake rotation shaft 180 to allow the blind fabric 102 to rise.

Meanwhile, when the brake rotation shaft 180 is released from the brake spring 156 by the pulling operation of the lowering strap 152, the second one-way ratchet 160 releases the brake rotation shaft 180 and the brake ratchet 186. The orthogonal surface is meshed to rotate back together, and to rotate simultaneously with the square main shaft 182.

The lower operation unit 150 has a structure in which the lowering displacement of the lowering string 152 is amplified twice with respect to the lowering displacement of the lowering lever 154 during the pulling operation of the lowering string 152.

That is, as shown in Figure 6a, the lower end of the strap 152 is fixed to the bottom surface of the housing 110 through the knot 152a, and extended to the upper side of the hole 154c of the lower lever 154 Passing through, the direction is changed to the lower side so that the other end passes through the bottom surface of the housing 110 and extends to the lower portion of the housing 110.

Such a change in direction of the lower string 152 is a length that the user pulls the lower string 152 to the lower side when the lower operation of the blind fabric 102, the length longer than the downward movement distance of the lower lever 154 Allow them to pull. Therefore, the user can adjust the fine angle θ of the brake spring 156 through the length amplification structure.

And when the user pulls the lowering strap 152 to the middle of the maximum downward displacement, such as the lower operation unit 150, the brake spring 156 is opened only halfway and the brake spring 156 and the brake rotation shaft 180 and Friction is generated between the through, it is possible to slowly adjust the rate of falling of the blind fabric 102 through such friction.

However, when the user pulls the lowering strap 152 completely downward to its maximum displacement, the brake spring 156 fully opens the brake rotational shaft 180 to freely rotate the brake rotational shaft 180 within the brake spring 156. Make it possible.

Therefore, the winding rod 104 wound around the blind fabric 102 can be rotated without any restraint, thereby allowing free fall by the weight of the blind fabric 102.

In addition, the free fall type slim roll blind 100 for preventing child safety accident according to the present invention, the connection portion for transmitting the power of the lifting operation unit 120 and the lower operation unit 150 to the take-up rod 104 ( 200).

The connection part 200 has a rectangular main shaft having the rising actuator 120, the return actuator 140, and the falling actuator 150 disposed around and rotatably mounted to the housing 110. 182 is provided. In addition, as shown in FIGS. 1 and 5B, the square main shaft 182 is connected to a first gear 202, and one end of the winding rod 104 is connected to the first gear 202. The second gear 204 connected to the engagement structure.

Free fall-type slim roll blind 100 for preventing child safety accidents according to the present invention configured as described above, when the lifting strap 122 is pulled to the lower side automatically returns to the original operation is made blind fabric 102 continuously When the lowering strap 152 is pulled to the lower side, the lowering can be rapidly lowered by the weight of the blind fabric 102, and at the same time, the lowering speed can be freely controlled by adjusting the pulling force of the lowering strap 152. Adjustment is possible.

First, the rising operation of the blind fabric 102 will be described.

When the user pulls the lifting strap 122 downward, the side pulley 124 rotates forward and the side ratchet 126 that engages at a right angle through the first one-way ratchet 130 rotates with the square main shaft 182. The winding rod 104 is rotated forward through the first and second gears 202 and 204, and the lifting operation of the blind fabric 102 is achieved.

In this case, the brake rotation shaft 180 is locked by the brake spring 156 in the second one-way ratchet 160, but the brake ratchet 186 connected to the square main shaft 182 may be the second one-way ratchet 160. The rotation is made while the brake rotation shaft 180 is stopped while holding the inclined surface coupling through the hard surface. In this case the second pushing spring 188 is compressed to allow the brake ratchet 186 to rotate forward.

As such, once the lifting strap 122 is pulled downward, it is necessary to pull again, in which case the user releases the pulled state of the lifting strap 122. When the pulled state of the lifting string 122 is released as described above, the return spring 142 of the return operation unit 140 is operated, and the lift pulley 124 is reversely rotated through the accumulated torsional restoring force.

At this time, the raised pulley 124 is reversely rotated and returned to the side ratchet 126 through the first one-way ratchet 130, the first one-way ratchet 130 is the raised pulley 124 and the side ratchet 126 Only the lifting pulley 124 is reversed while the side ratchet 126 remains intact through the inclined surface coupling therebetween, and the lifting strap 122 is wound up to its original position.

Therefore, the user again pulls the lifting strap 122 to the lower side, and repeats the pulling operation and the release operation to be able to raise the blind fabric 102 to the desired height.

Next, the lowering operation of the blind fabric 102 will be described.

When the user pulls the down strap 152, it moves the down lever 154 downward to release the locking state of the brake spring 156 through the brake lever 170.

In this case, the arm 176a provided in the second annular member 176 of the brake lever 170 fixes the other end 156b of the brake spring 156 to one side end 156a fixed to the housing 110. The brake rotation shaft 180 is released by narrowing the angle θ by rotating to the side.

As such, when the locked state of the brake rotation shaft 180 by the brake spring 156 is released, the blind fabric 102 in the raised state is moved downward by its own weight, and the blind fabric 102 is wound on the winding rod 104. ) Is rotated in reverse, and the square main shaft 182 is reversed through the second gear 204 and the first gear 202.

At this time, the square main shaft 182 rotates the side ratchet 126 and the brake ratchet 186 at the same time, the side ratchet 126 is reversely rotated through the first one-way ratchet (130) by the rising pulley coupled It rotates firmly with respect to 124 and the ascending pulley 124 remains stationary as it is. At this time, the first pushing spring 134 is compressed to allow reverse rotation of the side ratchet 126 relative to the lifting pulley 124.

At the same time, the brake ratchet 186 of the lowering operation unit 150 simultaneously rotates the brake rotation shaft 180 through the second one-way ratchet 160 while the brake rotation shaft 180 is rotated from the brake spring 156. Since the locked state is released, the brake ratchet 186 simultaneously rotates backward with the brake rotation shaft 180 to allow the blind fabric 102 to descend.

In the lowering process of the blind fabric 102, when the user pulls the lowering strap 152 completely downward at its maximum displacement, the brake spring 156 completely opens the brake rotational shaft 180 to thereby operate the brake spring 156 in the brake spring 156. In the free rotation of the brake rotation shaft 180 is enabled, the winding rod 104 can be rotated without any restraint so that the free fall by the weight of the blind fabric 102 is possible.

However, when the user pulls the lowering strap 152 to the middle of its maximum downward displacement, the brake spring 156 opens only about the middle to generate friction between the brake spring 156 and the brake rotational shaft 180. Therefore, the falling speed of the blind fabric 102 can be slowly adjusted through such friction.

Accordingly, the operation of the lowering operation unit 150 is such that the user pulls the lowering string 152 strongly or gradually pulls the lowering string 152 between the brake spring 156 and the brake rotation shaft 180. By easily adjusting the size of the frictional resistance generated in, it is possible to conveniently adjust the descending speed of the blind fabric (102).

If the blind fabric 102 is lowered as described above, and then the user wants to raise the blind fabric 102 again, the user pulls the lift strap 122 of the lift operation unit 120 again to remove the blind fabric 102. The height can be adjusted again.

As described above, according to the free-falling slim roll blind 100 of the present invention, the conventional pulling string is divided into a rising string 122 and a falling string 152, and when the rising string 122 is pulled to the lower side, the blind Along with the rise of the fabric 102, the in-situ return operation of the lifting strap 122 can be made automatically to raise the blind fabric 102 in succession.

Therefore, the present invention can completely prevent the indoor safety accident related to the pull string through the two-row structure in relation to the use of the roll blind.

In addition, by replacing the use of the conventional chain pulley on the side of the roll blind can minimize the distance between the side parts, thereby minimizing light leakage from the outside during installation of the roll blind .

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such a specific structure. Those skilled in the art may variously modify or change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Nevertheless, such design modifications or variations are intended to be clearly understood as falling within the scope of the present invention.

Claims (7)

In a roll blind device in which a blind fabric is wound around a winding rod or unrolled from the winding rod to be used for shading, A housing disposed side by side with the winding rod on the upper side of the winding rod to which the blind fabric is wound; The lifting pulley is formed on one side of the inner side of the housing, the lifting pulley is wound on one side, the side ratchet is connected to the side through the first one-way ratchet coupling, the side ratchet is connected to enable the power transmission to the winding rods An upward actuating unit for raising the blind fabric by the rotation of the winding rod by a pulling operation of the upward strap; And a return spring connected to the lift pulley on the side opposite to the side ratchet of the lift operation portion, and when the lift pulley is pulled and the lift pulley rotates, the torsion restoring force is accumulated, and when the pulled state of the lift strap is released, the torsion restoring force is used. A return operation unit which reversely rotates the lift pulley and lifts the lift strap back to its original position; The other end of the housing has a lowering lever is fixed to the lower end of the lower lever, and the other end of the lower lever is connected to the brake spring to control the rotation of the winding rod, when the lowering string is pulled, the brake release of the brake spring Falling operation is made by the fall made of the blind fabric; And And a connecting portion having a main shaft rotatably mounted with respect to the housing, the connecting portion having a first gear connected to one end of the main shaft and a second gear connected to one end of the winding rod. When pulled, it can automatically return to the original position, so that the blind fabric can be continuously raised, and when the descending string is pulled to the lower side, it can be lowered by the weight of the blind fabric, and at the same time, the lowering speed can be adjusted by adjusting the pulling force of the descending string. Free-fall slim roll blinds for preventing child safety accidents, characterized by free adjustment. 2. The flattened pulley of claim 1, wherein the raised actuating portion is wound around the raised pulley, and the raised pulley is fitted such that an inner diameter thereof is rotatable to an outer diameter portion of the side ratchet. While being integrally fitted to the shaft, the side ratchets are pressed against the lifting pulleys by means of a first pushing spring located opposite the lifting pulleys and engaged with each other through a first one-way ratchet, wherein the first one-way ratchets As the pulley rotates in the forward direction by pulling, the side ratchet is simultaneously rotated in the forward direction through the first one-way ratchet, and the side ratchet rotates the square main shaft to wind the blind wound around the winding rod through the first and second gears of the connection portion. Free-fall type slim roll for preventing child safety accident, characterized in that it is configured to raise the fabric Rind. According to claim 1, wherein the return operation portion is one end of the return spring made of a torsion spring is connected to the lifting pulley, the other end of the return spring is fixed to the inner wall of the housing so that the return spring in accordance with the rotation of the lifting pulley The torsion restoring force is accumulated, and when the pulling state of the ascending strap is released, the ascending pulley is reversed by using the torsion restoring force, and the first one-way ratchet is a side ratchet through contact between the inclined surfaces between the ascending pulley and the side ratchet. The free fall slim roll blind for preventing child safety accident, characterized in that the lift pulley is reversed in the stationary state and configured to return the lift strap to its original position. The lower lever of claim 1, wherein the lower actuating part is connected to one end of the lower lever so as to be rotatable about a hinge, and a support spring is provided at the center lower part of the lower lever to support the lower lever of the housing. Is always elastically supported to the upper side, and the hinge end of the lower lever is tightly connected to the brake lever to operate the brake spring, and the opposite end of the lower lever is formed with a hole so that one end of the lower lever is formed at the bottom of the housing. As the fixed down strap passes through the hole and penetrates to the bottom of the housing and extends to the bottom of the housing, the pulling operation of the down strap causes the lowering pivot of the down lever around the hinge while pressing the support spring to the hinge side. The end is raised to open the brake spring through the brake lever, The release of the blind fabric is made by the release of the hook to allow the winding rod to be lowered, and when the pulling operation of the lowering string is released, the restoring force of the lowering lever is caused by the restoring force of the hinge through the restoring force of the support spring, thereby causing the hinge side end. Free fall type slim roll blinds for preventing child safety accidents, characterized in that configured to stop the fall of the blind fabric by lowering and locking the brake spring through the brake lever to stop the rotation of the winding rod. According to claim 1 or 4, The lowering operation portion is splined to the first annular member and the first annular member, the brake lever is connected to enable power transmission to the hinge side end of the lower lever, one side An end portion having a second annular member having an arm connected to an end of the brake spring, the brake spring having one end thereof fixed to an inner wall of the housing, the other end being in close contact with an arm of the second annular member, and It is connected to the release operation, the inside of the brake spring is provided with a cylindrical brake rotational shaft rotatably connected to the square main shaft through the first bushing, the inside of the brake rotation shaft is mounted to the square main shaft, the second The brake ratchet engaging the second one-way ratchet with the brake rotation shaft by the pushing spring On the other hand, the second pushing spring is a child characterized in that the one end is in close contact with the second bushing fitted in the square main shaft, the other end is configured to engage the second one-way ratchet by pushing the brake ratchet to the brake rotation axis. Free fall slim roll blinds to prevent accidents. The angle of the brake spring as set forth in claim 5, wherein the lower actuating part adjusts the angle at which the arm of the second annular member is connected to the end of the brake spring by adjusting the spline coupling angle of the second annular member to the first annular member. The second one-way ratchet is configured to enable universal application according to the change, and when the pulley is rotated by the pulling operation of the lifting strap, the brake ratchet is inclined through the rotation of the square main shaft while the brake rotation shaft is locked by the brake spring. Allowing to rotate through the coupling, the brake rotation shaft and the brake ratchet is configured to rotate together with the square main shaft when the brake rotation axis is unlocked from the brake spring by the pull operation of the lowering strap for preventing child safety accidents Free Fall Slim Roll Blinds . The method of claim 6, wherein the lowering operation portion is a pull operation of the lowering strap, the lowering displacement of the lowering strap is amplified twice with respect to the lowering displacement of the lowering lever to allow fine adjustment of the brake spring during the lowering operation of the blind fabric, Pulling down the strap in the middle of its maximum displacement causes the brake spring to open halfway, creating friction between the brake spring and the brake rotation axis, through which friction adjusts the descending speed of the blind fabric, When fully pulled to the lower side with the maximum displacement, the brake spring completely opens the brake rotation shaft to allow free rotation of the brake rotation shaft within the brake spring, so that free fall due to the weight of the blind fabric is prevented. Free-fall slim roll Rind.

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