KR101422998B1 - Roll blind apparatus of slim type having two cords for prevention of child's accident - Google Patents

Abstract

The present invention relates to a roll blind apparatus capable of preventing sunlight from penetrating a window and capable of preventing exposure of indoor privacy. According to the present invention, the roll blind apparatus is a two-string slim roll blind which comprises: a descending operation part wound with a descending string, and descending a blind fabric; an ascending operation part wound with an ascending string, and ascending the blind fabric; a power transmitting part having the descending operation part and the ascending operation part symmetrically mounted to be parallel to each other; a returning operation part returning the descending string or the ascending string to an original position respectively using an accumulated elastic restoring force when a descending gear part or an ascending gear part is rotated by the pulling of the descending string or the ascending string; and a cover covering the descending operation part, the ascending operation part, the power transmitting part, and the returning operation part, and separately positioned at the upper side of a winding bar on which the blind fabric is wound, wherein the blind fabric has a vertical height which is continuously adjusted when a user repetitively pulls the descending string or the ascending string respectively. According to the present invention, one of the descending string and the ascending string is returned to the original position automatically and smoothly after pulled down, thereby continuously and easily ascending or descending the blind fabric. In addition, according to the present invention, a distance between parts at the side of the roll blind is minimized to minimize the penetration of a light from the outside.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roll blind,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll blind apparatus capable of preventing the entry of sunlight through a window and preventing exposure to privacy in the room. More specifically, the present invention relates to a rolled blind apparatus for raising and lowering a blind fabric, The blind fabric can be easily moved up and down in a continuous manner by automatically and smoothly returning to the original position after any one of the lower string and the upper string is pulled to the lower side, The present invention relates to a two-row slim roll blind for minimizing the leakage of light from the outside by minimizing the interval between components in a child's safety accident.

In general, a roll blind is installed on windows of various buildings and is used as a means for preventing shading from outside, controlling illumination of the room, or preventing invasion of privacy in the room.

Such roll blinds typically have one or a plurality of blind fabrics installed in the horizontal direction and are used to wind up the wind-up bar on the upper wind-up bar, to store it, or to unwind it from the wind-up bar to block the window.

In such a conventional roll blind, a drive bracket and a follower bracket are provided on both sides of a frame fixed to a wall or the like, and a pipe-shaped take-up rod is rotatably mounted between the brackets, and a blind fabric is wound around the take- , And the weight is fixed to the lower end thereof, so that the weight of the blind fabric from the winding rod is loosened downward by the weight.

In addition, the drive bracket is provided with a chain pulley which is integrally connected to the take-up bar and rotates. A pulling cord is wound on the chain pulley. When one side of the pulling strap is pulled, the winder is rotated through the chain pulley, The fabric is wound around the winding rod and raised.

When the other side of the pulling string is pulled, the chain pulley rotates in the reverse direction while rotating the winding rod in the opposite direction, so that the blind fabric is loosened from the winding rod and lowered.

On the other hand, the pulling string used for the user to wind up or down the blind fabric is an endless track type, which is wound around the chain pulley, and the lower end thereof is elongated downward. Therefore, such a pull cord can lead to a very dangerous situation.

In order to fundamentally prevent such a problem, development of a technique of separating the lower end of a conventional pull-up cord that has been stretched in an infinite track shape and shortening the length thereof and placing it at a height not reachable by children, .

A technique for effectively solving such a problem has been made by Korean patent application No. 2011-0122135 proposed by the applicant of the present invention, "Roll blind with silent two-way clutch ".

In such a conventional technique, the lower end of the pull string which moves up and down the blind fabric is separated and the length of the string is shortened so that the blind fabric can be smoothly moved up and down even if it is positioned at a high position out of reach of children, In order to prevent the safety accident in the room in advance.

One side of the lower safety strap is used as a lowering strap for lowering the blind fabric and the other side is used as a lifting strap for pulling the blind fabric. Once one side of the lowering strap or the upper strap is pulled down through the bidirectional clutch, So that the user can easily raise and lower the blind fabric continuously by using a descent strap or a lifting strap, and the convenience of use can be obtained.

However, such a conventional technique has a structure in which the chain pulley is structurally formed to have a large width on the side of the chain pulley component by having a chain pulley which is operated by hanging a downward strap and a lifting strap, .

That is, in the conventional technology, the downward strap and the upward strap are formed of a single chain string, and the operation stability and the usability and the like are improved by using the chain pulleys for the stability of operation, An unexpected problem occurred that some light entered the room through the space between the pulleys.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a blind fabric, The present invention provides a two-row slim-type roll blind for preventing a child safety accident, which is improved so as to obtain the convenience of use.

It is another object of the present invention to provide a roller blind which is capable of minimizing the gap between side parts by replacing the use of a chain pulley at the side of the roll blind, And a two-row slim roll blind for preventing child safety accidents.

In order to accomplish the above object, the present invention provides a roll blind apparatus for wrapping a blind fabric around a winding rod or using the blind fabric for shading by unloading it from a winding rod,

A lowering operation portion having a lowering gear pulley having a lowering pulley formed at one side thereof and a lowering gear pulley having a lowering gear portion integrally formed at one side thereof and a lowering ratchet portion elastically unidirectionally ratchetically coupled to a side surface of the lowering gear pulley;

And a lifting pulley having a lifting pulley wound around the lifting operation portion at one side thereof and a lifting gear pulley having a lifting gear portion integrally formed at the other side of the lifting pulley, An elevating operation portion having a ratchet portion;

And wherein the lower operation portion and the upward operation portion are symmetrically arranged to be parallel to each other and have a rectangular main axis that rotates in accordance with the operation of the lower operation portion and the upward operation portion and that the rotation of the rectangular main axis is transmitted to the winding rod side A power transmission unit having an auxiliary gear for rotating the winder rod in normal and reverse directions;

And an elastic restoring member for restoring an elastic restoring force through a downward return gear or an upward return gear engaged with the downward gear portion or the upward gear portion when the downward gear portion or the upward gear portion is rotated by the pulling of the downward strap or the upward strap The lower gear portion or the upper gear portion rotates the lower gear portion or the upper gear portion in a reverse direction by the accumulated elastic restoring force of the elastic restoring member so that the position of the blind fabric is shifted A restoring operation portion for restoring the descending strap or the lifting strap respectively; And

And a cover separately surrounding the lower operation portion, the upward operation portion, the power transmission portion, and the return operation portion, and separately disposed on the upper side of the winding rods around which the blind fabric is wound, The present invention provides a two-row slim roll blind for preventing child safety accidents, which is configured to continuously adjust the up-and-down movement of the blind fabric by repeating the pulling operation.

Preferably, the lowering operation portion is mounted such that a lowering gear pulley is rotatable on a rectangular main shaft of the power transmitting portion through a lower gear bushing, and a lowering ratchet portion adjacent to the lowering gear pulley is mounted on the rectangular main shaft Wherein the lower gear portion is engaged with the lower gear portion of the lower gear portion by a downward support spring so as to be always in close contact with the side surface of the lower gear portion so as to be unidirectionally ratchet- The lower gear pulley rotates reversely through the resilient restoring force of the elastic restoring member stored in the return actuating unit when the pulling of the lowering cord is released, The lifting strap is wound up on the lifting pulley, Reverse rotation of the gear pulley provides a 2-line slim roll blind for a child safety accidents, characterized in that the winding rod falling through rotating parts of the power transmission yirueojyeoseo the idling state of the rotation stop parts of the falling latch is prevented.

Preferably, the lifting operation portion is mounted such that a lifting gear pulley is rotatable through a lifting gear bushing on a quadrangular main shaft of the power transmitting portion, and an uplifting ratchet portion adjacent to the lifting gear pulley is mounted on the quadrangular main shaft Wherein the upper ratchet portion is rotated in one direction simultaneously through the up gear pulley when the lifting rope is pulled, and the ratchet portion is rotated by the rotation of the power transmitting portion The lifting rod is rotated to rotate the auxiliary gear so as to wind up the blind fabric. When the pulling of the lifting strap is released, the lifting gear pulley rotates reversely through the resilient restoring force of the elastic restoring member accumulated in the returning operating portion Up hoist on the rising pulley, Rising gear reverse rotation of the pulley there is provided a two-line slim roll blind for a child safety accidents, characterized in that the protection is wound rod take-up rotation through portion yirueojyeoseo power transmission to the idling state rotates the Rising ratchet parts stationary.

Preferably, the downward tether and the upward tether are each formed of a band in the form of a flat strip, and the direction in which the downward tether is wound on the downward pulley of the downward gear pulley is such that the upward tether is wound The lower gear bushing and the lowering ratchet portion, and when the rising operation of the blind fabric is performed by the pulling operation of the lifting strap in the middle of the lowering string, 1 stopper is mounted on the main shaft, and when the lowering operation of the blind fabric is performed by the pulling operation of the lifting strap in the middle of the lifting strap, And the first and second stoppers are engaged with the cover so that a descending strap or a raised strap It provides a two-line Slim Roll blinds for children's safety accident prevention configured to prevent colds or increase the gear pulley gear pulley.

In the present invention, preferably, the power transmitting portion is mounted in the cover with the H-shaped bushing at the center of the rectangular main shaft and the side bushes at the left and right sides thereof rotate together with the operation of the lower operating portion or the upward operating portion, The present invention provides a two-row slim roll blind for preventing a child safety accident that is integrally rotated by being press-fitted to the rectangular main axis.

Further, according to the present invention, preferably, the return operation portion is fitted at regular intervals so as to oppose each other such that the downward return gear and the upward return gear are rotatable on a spring axis of a fixed circular cross section, And both ends of the coil spring are fixed to the lower return gear and the upward return gear, respectively, so that any one of the lower return gear and the upward return gear is rotated on the spring axis, A two-row slim roll for prevention of child safety accident which is operated to restore elasticity restoring force by restraining the elastic restoring member when the elastic restoring member is twisted at the down gear portion and the up gear portion, Provide blinds.

Preferably, the downward tether and the upward tether are wound on the downward and upward pulleys through the downward guide pulleys and the uptight guide pulleys adjacent to the downward pulley and the upward pulley, respectively, And a two-row slim roll blind for preventing child safety accidents, each of which has a handle stick, is provided at the end thereof.

According to the two-row slim type roll blind for preventing a child safety accident of the present invention, the user can repeatedly perform the operation of pulling the downward strap or the upward strap so as to continuously and easily adjust the vertical height of the blind fabric, It is possible to prevent the safety accident in advance in advance, and the user can conveniently use the roll blind.

According to the present invention, the lowering string and the upper string made of a conventional chain string are replaced by the lower string and the upper string, each consisting of a band having a width of about 3 mm in the form of a flat strip wound around the lower pulley and the upper pulley, By eliminating the chain pulleys, the spacing between the side parts of the roll blinds can be minimized. Accordingly, when the roll blind is installed, the leakage of light from the outside into the parts of the roll blind is minimized, and an improved effect of obtaining a more stable indoor shading effect can be obtained.

1 is an external perspective view of a two-row slim type roll blind for preventing child safety accidents according to the present invention.
2 is a vertical sectional view showing a lower operation portion, a lift operation portion, a power transmission portion, and a winding rod of a two-row slim type roll blind for preventing a child safety accident according to the present invention.
3 is a plan sectional view showing a lower operation portion, a lift operation portion, a power transmission portion, and a return operation portion of a two-row slim type roll blind for preventing a child safety accident according to the present invention.
FIG. 4A shows a downward gear pulley and a downward ratchet portion of a lowering operation portion provided in a two-row slim roll blind for preventing a child safety accident according to the present invention. In the downward gear pulley and the downward ratchet portion, Fig. 3 is an exploded perspective view showing the ratchet structure.
FIG. 4B is a perspective view illustrating a unidirectional ratchet structure of a downward gear pulley and a downward ratchet portion of a lowering operation portion provided in a two-row slim roll blind for preventing a child safety accident according to the present invention, or a rising gear pulley and an upward ratchet portion of the upward operation portion; Fig.
FIG. 5A is a view showing a coupling structure of a lowering gear pulley of the lowering operation part and a lowering return gear of the returning operation part provided in the two-row slim roll blind for preventing child safety accident according to the present invention, Sectional view showing a structure applied to a coupling structure of a negative ascending return gear.
5B is a side cross-sectional view illustrating a state in which the auxiliary gear of the power transmitting portion provided in the two-row slim roll blind for preventing child safety accident according to the present invention is engaged with the driving gear of the take-up rod.
6 is a side cross-sectional view illustrating a state in which a descent strap and a lifting strap provided on a two-row slim roll blind for preventing a child safety accident according to the present invention are wound on a descending pulley and a lifting pulley through a descending guide pulley and a lifting guide pulley .
FIG. 7 is a cross-sectional view showing a cross-section of a take-up rod provided in a two-row slim roll blind for preventing a child safety accident according to the present invention, and operates in a conventional structure.

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

1 and 2, a two-row slim roll blind 100 for preventing a child safety accident according to the present invention is constructed such that a blind fabric 102 is wound around a winding rod 106 and stored, (106) and used for shading.

In the two-row slim type roll blind 100 for preventing a child safety accident according to the present invention, a cover 390 separately positioned on the upper side of the wind-up bar 106 on which the blind fabric 102 is wound is positioned The lower cover 300 includes a lower cover 300 and a lower cover 300. The cover 390 includes a lowering operation part 120, a lift operation part 220, the power transmission part 300 and a return operation part 340 described later.

The lower operating portion 120 is a portion that operates to lower the blind fabric 102 and includes a lowering pulley 132 wound around the circumference of the lowering string 122 as shown in FIGS. And a lower gear portion 130 having a lower gear portion 134 integrally formed on the other side thereof. The lower operation portion 120 includes a lower ratchet portion 150 elastically coupled to a side surface of the lower gear pulley 130 in a unidirectional manner.

The lower operation part 120 is mounted on the rectangular main shaft 310 of the power transmitting part 300 to be rotatable through the lower gear bushing 160, The downward ratchet 150 adjacent to the gear pulley 130 is urged downward by the lower support spring 170 fitted on the rectangular main shaft 310 of the power transmission part 300, Tightly coupled and unidirectionally ratchet-coupled.

As shown in FIGS. 4A and 4B, the downward gear pulley 130 and the downward ratchet 150 have a structure in which angled ratchet teeth 138 and 158 formed on one side are engaged with each other. The downward gear pulley 130 and the downward ratchet part 150 are moved in the direction in which the vertical surface 138a of the angled ratchet 138 of the lower ratchet part 130 and the vertical surface 158a of the angled ratchet 158 of the lower ratchet part 150 face each other, The down gear pulley 130 and the downward ratchet 150 rotate integrally with each other.

However, if the inclined surface 138b of the angled ratchet 138 of the downward gear pulley 130 is rotated in the direction in which the inclined surface 158b of the angled ratchet 158 of the downward ratchet portion 150 are opposed to each other, Rotation connection between the lower gear pulley 130 and the lower ratchet part 150 is not achieved and only one of the lower gear pulley 130 and the lower ratchet part 150 is rotated on the inclined surfaces 138b and 158b , And the other one is not rotated. Therefore, the ratchet coupling formed on the downward gear pulley 130 and the downward ratchet 150 is a unidirectional ratchet coupling in which rotation is transmitted only in one direction.

The ratchet coupling formed on the lowering gear pulley 130 and the lowering ratchet part 150 may be performed by the ratchet coupling formed on the up gear pulley 230 and the up ratchet part 250 of the up operation part 220, The same principle of operation is applied to the ratchet coupling direction of the down gear pulley 130 and the downward ratchet part 150, and the operation principle thereof is the same.

The two-row slim type roll blind 100 for preventing a child safety accident according to the present invention includes a rising operation part 220 disposed adjacent to the lower operation part 120 and moving up the blind fabric 102, Respectively.

2 and 3, the lifting operation unit 220 includes a lifting pulley 232 on one side thereof and a lifting gear unit 234 on the other side. And an up gear pulley 230 integrally formed therewith. The lifting operation part 220 includes a lift ratchet part 250 elastically and unidirectionally coupled to a side surface of the lifting gear pulley 230.

The lifting operation part 220 is mounted such that the lifting gear pulley 230 is rotatably mounted on the rectangular main shaft 310 of the power transmitting part 300 through the lifting gear bushing 260, Is always brought into close contact with the side surface of the up gear portion 234 by the upward support spring 270 fitted on the rectangular main shaft 310 of the power transmitting portion 300 so that the unidirectional ratchet It is a structure to be combined.

4A and 4B, the lifting gear pulley 230 and the lifting ratchet part 150 have the same structure, and the lifting gear pulley 230 and the lifting ratchet part 250 have the same structure as the lifting gear pulley 130 and the lifting ratchet part 150, The ratchet coupling direction is the opposite direction to the ratchet coupling formed in the downward gear pulley 130 and the downward ratchet part 150. Since the operation principle of the ratchet coupling is the same as that of the unidirectional ratchet coupling, A detailed description will be omitted.

The two-row slim roll blind 100 for preventing a child safety accident according to the present invention has a power transmission unit 300. The power transmission unit 300 is connected to the lower operation unit 120 And a rectangular main axis 310 which is integrally rotated in accordance with the operation of the lower operation part 120 and the upward operation part 220. [ An auxiliary gear 312 is provided to transmit rotation of the rectangular main shaft 310 from the one side of the rectangular main shaft 310 to the side of the winding rod 106 to perform normal and reverse rotation of the winding rod 106 .

2 and 3, the H-shaped bushing 314 is mounted at the center of the rectangular main shaft 310 and the side bushings 316 are attached to the left and right sides of the cover 320 390 and rotates in the cover 390 together with the operation of the lower operation portion 120 or the upward operation portion 220. [

The auxiliary gear 312 mounted on one side of the rectangular main shaft 310 is integrally rotated by being press-fitted into the rectangular main shaft 310. As described later, And coupled to the associated drive gear 108 (see FIG. 5B).

The two-row slim type roll blind 100 for preventing child safety accidents according to the present invention includes a return operation portion (not shown) for restricting the downward strap 122 or the upward strap 222, respectively, without moving the blind end 102 340).

When the lowering gear portion 134 or the upper gear portion 234 is rotated by the pulling of the lowering string 122 or the upper string 222, And an elastic restoring member 360 for restoring an elastic restoring force through a descending return gear 352 or an ascending return gear 354 that engage with each other.

3, a return return gear 352 and a return return gear 354 rotate on a spring shaft 358 having a circular section fixed to the inside of the cover 390, And a coil spring 362, which is an elastic restoring member 360, is sandwiched coaxially on the spring shaft 358 in between.

The coil spring 362 serving as the elastic restoring member 360 is fixed to the inner side of the lower return gear 352 and the upward return gear 354 at both sides thereof so that the lower end of the lower return gear 352, When any one of the gears 354 is rotated on the spring shaft 358 and the other is fixed, the elastic restoring member 360 is twisted between the lower return gear 352 and the upward return gear 354 The elastic restoring force is accumulated, and such elastic restoring force is actuated to return the descending strap 122 or the lifting strap 222, as will be described later.

Meanwhile, in the two-row slim type roll blind 100 for preventing a child safety accident according to the present invention, the downward strap 122 and the upright strap 222 are each formed of a flat band-shaped band, And is rolled in the opposite direction in the form of a roll to the lower pulley 132 of the lower gear pulley 130 and the upper pulley 232 of the up gear pulley 230, respectively.

That is, the direction in which the lowering string 122 is wound on the lowering pulley 132 of the lowering gear pulley 130 is opposite to the direction in which the rising string 222 is wound on the rising pulley 232 of the upward gearing pulley 230 A first stopper 122a is integrally mounted in the middle of the descending strap 122 and a second stopper 222a is integrally mounted in the middle of the clamping strap 222. [

The first stopper 122a of the descent strap 122 is moved in a direction in which the rectangular main shaft 310 and the descending gear bushing 160 are rotated when the ascending operation of the blind fabric 102 is performed by pulling- And the lowering gear pulley 130 is prevented from being reversely rotated through the lowering ratchet part 150.

The second stopper 222a of the lifting strap 222 is urged by the pulling action of the lifting strap 122 to lower the rectangular main shaft 310 and the lifting gear bushing 260 And the rising ratchet portion 250 to prevent the up gear pulley 230 from being reversely rotated.

The first and second stoppers 122a and 222a are caught by the cover 390 during the lifting so that the lifting strap 122 or the lifting strap 222 is engaged with the lifting gear pulley 130 or the lifting gear pulley 230 Thereby preventing the downward gear pulley 130 and the up gear pulley 230 from rotating in the reverse direction, respectively. The first and second stoppers 122a and 222a may be formed of enlarged protrusions, but may be formed of other types of clips or the like.

The descending strap 122 and the lifting strap 222 are connected to the lifting pulley 132 and the lifting pulley 132 through a descending guide pulley 133 and a lifting guide pulley 233 adjacent to the lifting pulley 132 and the lifting pulley 232, And can be lifted smoothly without friction with the cover 390 by winding the lifting pulley 232 (see FIGS. 3 and 6), and a handle stick (not shown) can be provided at each end thereof.

In the two-row slim type roll blind 100 according to the present invention, the wind-up rod 106 to which the blind fabric 102 is wound includes a driving gear 108 that is engaged with the auxiliary gear 312 of the power transmitting portion 300 As shown in FIG. 2, a brake spring 410 and a push rod 420 as shown in FIG. 7 and the like are provided in the inside, and the structure of such a winding rod 106 is as shown in FIG. And therefore, a detailed description thereof will be omitted.

In the two-row slim type roll blind 100 for preventing child safety accident according to the present invention, the user repeats the operation of pulling the downward tether 122 or the upward tether 222, It is operated so as to easily adjust the up and down elevation continuously.

First, for example, when the descending strap 122 is pulled downward, the descending strap 122 rotates the descending ratchet part 150 in one direction through the descending gear pulley 130.

Since the vertical surface 138a of the angled ratchet 138 of the downward gear pulley 130 and the vertical surface 158a of the angled ratchet 158 of the downward ratchet 150 are rotated in opposite directions, Rotation transmission is performed. When the downward ratchet part 150 is rotated, the rectangular main shaft 310 rotates to rotate the auxiliary gear 312 of the power transmitting part 300 so that the blind fabric 102 is lowered, (Not shown).

At the same time, the rotation of the rectangular main shaft 310 simultaneously rotates the lift ratchet part 250 of the lift operation part 220 in the same direction at the same time when the lift ratchet part 250 is inclined 258b are rotated in the direction facing each other on the inclined surface 238b of the inclined ratchet 238 of the up gear pulley 230. [

The upward rotation of the ratchet part 250 causes the upward gear pulley 230 to rotate together with the friction of the inclined surfaces 238b and 258b. The upward movement of the up gear pulley 230 is prevented by the second stopper 222a from entering the inside of the cover 390 so that the up gear pulley 230 can not rotate together with the upright ratchet part 250,

In this case, the inclined surface 258b of the inclined ratchet 258 of the ascending ratchet part 250 makes an idle rotation over the inclined surface 238b of the inclined ratchet 238 of the up gear pulley 230, The rising support spring 270 is compressed and its length is reduced. However, when the rising support spring 270 moves beyond the inclined surface 238b, the inclined ratchet 258 of the upright ratchet part 250 is moved upwardly to the up gear pulley 230, And then the inclined surface 258b of the inclined ratchet 258 of the ascending ratchet part 250 rides over the inclined surface 238b of the next inclined ratchet 238 of the raised gear pulley 230 To make idle.

A plurality of inclined surfaces 258b of the angled ratchet 258 of the raised ratchet portion 250 are engaged with the raised gear pulley 230 Of the slant surface 238b of the slanting ratchet 238 of the tiltable ratchet 238. [

When the lower gear portion 134 rotates in accordance with the rotation of the lower gear pulley 130, the downward pulling of the lowering string 122 causes the lowering gear portion 134 to move downward The downward return gear 352 of the return operation portion 340 engaged with the gear portion 134 rotates but the upward return gear 354 engaged with the up gear portion 234 of the up gear pulley 230 in the stopped state, The coil spring 362, which is the resilient restoring member 360 positioned therebetween, is twisted between the downward return gear 352 and the upward return gear 354 to accumulate the elastic restoring force.

The elastic restoring force of the return operation portion 340 causes reverse rotation of the descending return gear 352 when the pulling string 122 is released.

The reverse rotation of the downward return gear 352 of the return operation portion 340 reversely rotates the downward gear portion 134 of the downward gear pulley 130 coupled with the reverse rotation of the downward return gear 352, And the lifting strap 122 is wound around it. At this time, the length of the descending strap 122 wound up through the descending pulley 132 corresponds to the length drawn by the user.

The downward ratchet portion 150 of the downward gear pulley 130 is rotated in the reverse direction so that the inclined surface 158b of the downward ratchet 158 abuts the downward gear pulley 130, And is connected to the up gear pulley 230 in a stopped state through the rectangular main shaft 310 and the upright ratchet part 250, , And can not be reversely rotated together with the downward gear pulley (130), thus maintaining the stopped state.

When the downward ratchet part 150 is stopped, the inclined surface 138b of the inclined ratchet 138 of the downward gear pulley 130 rises over the inclined surface 158b of the downward ratchet part 150, And the sloped surface 138b of the sloped ratchet 138 of the downward gear pulley 130 is rotated in a reverse idle state in which many of the sloped surfaces 138b of the sloped ratchet 158 of the downward ratchet portion 150 ride over the sloped surface 158b do.

As a result, the downward tether 122 pulled down by the user is rewound to the lowering pulley 132 through the reverse rotation of the lowering gear pulley 130, and the user pulls it back to lower the blind fabric 102 And the pulling operation of the descending strap 122 is repeated to lower the blind fabric 102 to a desired height.

When the downward blind fabric 102 is to be lifted again, the user pulls the lifting strap 222 in a state where the lifting strap 122 is kept still. In this way, the lifting strap 222 is pulled The auxiliary gear 312 of the power transmitting portion 300 is rotated through the rotation of the rectangular main shaft 310 to rotate the auxiliary gear 312 of the power transmitting portion 300, The winding rod 106 is rotated to wind up the blind fabric 102.

The direction in which the lifting strap 222 is wound on the lifting pulley 232 of the lifting gear pulley 230 is such that the lifting strap 122 is moved in a direction opposite to the direction in which the lifting pulley 130 is wound on the lifting pulley 132 The downward pulling of the lifting strap 222 is caused by the vertical surface 238a of the angled ratchet 238 of the up gear pulley 230 and the vertical surface 258a of the angled ratchet 258 of the upstanding ratchet 250, The rotation is made in the facing direction, and the rotation transmission is performed therebetween.

Thus, when the upright ratchet part 250 is rotated, the rectangular main axis 310 rotates in the same direction, which rotates the auxiliary gear 312 of the power transmitting part 300 so that the blind fabric 102 rises The winding rod 106 is rotated.

At the same time, the rotation of the rectangular main shaft 310 simultaneously rotates the lowering ratchet part 150 of the lowering operation part 120 in the same direction. At this time, the lowering ratchet part 150 is inclined with respect to the inclined surface 158b are rotated in the direction in which they face each other on the inclined surface 138b of the inclined ratchet 138 of the downward gear pulley 130. [

Therefore, the lowering ratchet part 150 tries to rotate the lowering gear pulley 130 together by friction between the inclined surfaces 138b and 158b, but the lowering string 122 wound around the lowering gear pulley 130 The downward gear pulley 130 can not be rotated together with the downward ratchet 150 because the first stopper 122a prevents the cover 390 from entering the inside of the cover 390.

In this case, the inclined surface 158b of the inclined ratchet 158 of the downward ratchet part 150 makes an idle rotation over the inclined surface 138b of the inclined ratchet 138 of the downward gear pulley 130, The downward support spring 170 is compressed and its length is reduced. However, if the downward support spring 170 moves beyond the inclined surface 138b, the angled ratchet 158 of the downward ratchet part 150 is returned to the downward gear pulley 130, And then the inclined surface 158b of the inclined ratchet 158 of the descending ratchet part 150 abuts against the inclined surface 138b of the inclined ratchet 138 next to the descending gear pulley 130 Make the idle turn.

A plurality of beveled surfaces 158b of the angled ratchet 158 of the downward ratchet portion 150 engage the lower gear teeth of the downward gear pulleys 130. As a result, Of the sloped ratchet 138 of the sloped ratchet 138. [0064] As shown in Fig.

On the other hand, the lower pulling of the lifting straps 222 accumulates the elastic restoring force in the return actuating portion 340. This is because when the lifting gear portion 234 rotates in accordance with the rotation of the lifting gear pulley 230, The upward return gear 354 of the return operation portion 340 meshed with the gear portion 234 rotates but the downward return gear 352 engaged with the downward gear portion 134 of the downward gear pulley 130 in the stopped state, The coil spring 362 as the elastic restoring member 360 positioned therebetween is twisted between the upward return gear 354 and the downward return gear 352 to accumulate the elastic restoring force.

The elastic restoring force of the return operation portion 340 causes the reverse rotation of the upward return gear 354 when the pulling string 222 is released.

The reverse rotation of the upward return gear 354 of the return operation portion 340 reversely rotates the upward gear portion 234 of the up gear pulley 230 engaged with the reverse rotation gear 354, And the lifting strap 222 is wound around it. At this time, the length of the lifting strap 222 wound up through the lifting pulley 232 corresponds to the length drawn by the user.

The upward ratchet portion 250 is configured such that the sloped surface 258b of the sloped ratchet 258 is engaged with the raised gear pulley 230, And is connected to the down gear pulley 130 in a stopped state through the rectangular main shaft 310 and the downward ratchet part 150, , It can not be reversely rotated together with the up gear pulley (230) and remains in a stopped state.

When the upright ratchet part 250 is stopped as described above, the inclined surface 238b of the inclined ratchet 238 of the up gear pulley 230 rises over the inclined surface 258b of the upright ratchet part 250, And the sloped surface 238b of the sloped ratchet 238 of the raised gear pulley 230 is rotated in a reverse idle state that rides over the sloped surface 258b of the sloped ratchet 258 of the raised ratchet portion 250 do.

As a result, the lifting strap 222 pulled down by the user is rewound to the lifting pulley 232 through the reverse rotation of the lifting gear pulley 230, and the user pulls it back downward, And the pulling operation of the lifting strap 222 can be repeated to raise the blind fabric 102 to a desired height.

As described above, according to the two-row slim type roll blind 100 for preventing a child safety accident of the present invention, when the user repeats the operation of pulling the downward tether 122 or the upward tether 222 downward, Can be continuously and easily adjusted. Therefore, the present invention can completely prevent an indoor safety accident related to the conventional endless track chain related to the use of the roll blind 100, and the user can conveniently adjust the height of the blind fabric 102.

According to the present invention, the lower band 122 and the upper band 222, which are the conventional chain strings, are wound in the lower and upper pulleys 132 and 232, respectively, It is possible to minimize the interval between the side parts of the roll blind 100 and to prevent the roll blind 100 from being moved from the outside to the roll blind 100. [ It is possible to obtain a more stable indoor light shielding effect by minimizing the leakage of light into the parts of the light emitting device.

Although the present invention has been described in detail with reference to specific embodiments thereof with reference to the accompanying drawings, the present invention is not limited to such specific structures. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the following claims. However, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: Two-row slim roll blinds for child safety accidents
102: blind fabric
106: Winding rod 108: Driving gear
120: descending operation part 122: descending strap
122a: first stopper 130: descending operation part
134: Lower gear portion 138, 158: Angle ratchet
138a, 158a, 238a, 258a: vertical surfaces 138b, 158b, 238b, 258b:
150: descent ratchet 160: descent gear bushing
170: descending support spring 220:
222: lifting strap 222a: second stopper
230: lifting gear pulley 232: lifting pulley
234: up gear portion 250: up ratchet portion
260: Up gear bushing 270: Upward support spring
300: Power transmission unit 310: Rectangular main axis
312: Auxiliary gear 314: H type bushing
316: Side bushing 340: Return operation part
352: descending return gear 354:
358: spring shaft 360: elastic restoring member
362: coil spring 390: cover
410: Brake spring 420:

Claims (7)

A roll blind apparatus in which a blind fabric is wrapped around a winding rod and used for shading by being stored or unwound from a winding rod,
A lowering operation portion having a lowering gear pulley having a lowering pulley formed at one side thereof and a lowering gear pulley having a lowering gear portion integrally formed at one side thereof and a lowering ratchet portion elastically unidirectionally ratchetically coupled to a side surface of the lowering gear pulley;
And a lifting pulley having a lifting pulley wound around the lifting operation portion at one side thereof and a lifting gear pulley having a lifting gear portion integrally formed at the other side of the lifting pulley, An elevating operation portion having a ratchet portion;
And wherein the lower operation portion and the upward operation portion are symmetrically arranged to be parallel to each other and have a rectangular main axis that rotates in accordance with the operation of the lower operation portion and the upward operation portion and that the rotation of the rectangular main axis is transmitted to the winding rod side A power transmission unit having an auxiliary gear for rotating the winder rod in normal and reverse directions; And
And an elastic restoring member for restoring an elastic restoring force through a downward return gear or an upward return gear engaged with the downward gear portion or the upward gear portion when the downward gear portion or the upward gear portion is rotated by the pulling of the downward strap or the upward strap The lower gear portion or the upper gear portion rotates the lower gear portion or the upper gear portion in a reverse direction by the accumulated elastic restoring force of the elastic restoring member so that the position of the blind fabric is shifted A restoring operation portion for restoring the descending strap or the lifting strap respectively;
Wherein the two-row slim roll blind for preventing child safety accidents. 2. The apparatus according to claim 1, further comprising a cover which surrounds the lower operation portion, the upward operation portion, the power transmission portion, and the return operation portion, and is separately disposed on the upper side of the wind- 2-line slim roll blind for safety accident prevention. [2] The apparatus according to claim 1, wherein the lowering operation portion is mounted such that a lowering gear pulley is rotatable on a quadrangular main shaft of the power transmitting portion through a lowering gear bushing, and a lowering ratchet portion adjacent to the lowering gear pulley is supported by a lowering support And the lower gear portion of the lower gear portion is rotated in the same direction through the lower gear pulley in one direction, and when the lower gear portion is pulled by the lower gear portion, The lowering gear pulley is rotated through the elastic restoring force of the elastic restoring member stored in the returning operation unit to rotate the winding rod so that the lowering pulley rotates, And a lifting strap is wound on the lifting gear pulley Wherein the reverse rotation is performed by idling in a state where the rotation of the lowering ratchet part is stopped and the lowering rotation of the winding rod is prevented through the power transmission part. 2. The apparatus according to claim 1, wherein the lifting actuating portion is mounted such that a lifting gear pulley is rotatably mounted on a quadrangular main shaft of the power transmitting portion through a lifting gear bushing, and an upstanding ratchet portion adjacent to the lifting gear pulley is mounted on the quadrangular main shaft, Wherein when the lifting rope is pulled, the lifting gear pulley is simultaneously rotated in one direction through the lifting gear pulley, and the auxiliary gears of the power transmission unit are rotated through the rotation of the main gear in one direction, And when the pulling of the lifting strap is released, the lifting gear pulley rotates reversely through the elastic restoring force of the elastic restoring member stored in the returning operating part, Hoist a hoop on the pulley, wherein the hoist gear pulley Wherein the reverse rotation of the lifting ratchet is made by idling while the rotation of the lifting ratchet is stopped, so that the winding rod is prevented from being wound around the power transmitting portion. [5] The apparatus according to claim 3 or 4, wherein the lowering string and the upper string are each formed of a band in the form of a flat strip, and a direction in which the lower string is wound on the lowering pulley of the lowering gear pulley, When the raising operation of the blind fabric is performed by the pulling operation of the lifting strap in the middle of the lowering strap, the lowering gear pulley is prevented from being reversely rotated through the rectangular main shaft, the lower gear bushing and the lowering ratchet portion And when the lowering operation of the blind fabric is performed by the pulling operation of the lowering string in the middle of the rising string, the rising gear pulley is prevented from being reversely rotated through the rectangular main shaft, the upward gear bushing and the rising ratchet part And the first and second stoppers are engaged with the cover so that the descending strap or the rising strap descends Uh pulley or rising 2 Slim-line roll blinds for child accident prevention according to claim that is configured to prevent a cold gear pulley. The power transmission unit according to claim 1, wherein the power transmitting portion is mounted in the cover at the center of the quadrangular main shaft and the side bushes are mounted on the left and right sides, respectively, and rotates together with the operation of the lower operation portion or the upward operation portion, Wherein the two-row slim-type roll blind is for preventing child safety accidents. 2. The spool according to claim 1, wherein the return actuating part is fitted on the spring axis of the fixed circular section so that the lower return gear and the upward return gear are rotatably opposed to each other at regular intervals, coaxial with each other, and both side ends thereof are fixed to the descending return gear and the ascending return gear, respectively, so that any one of the descending return gear and the ascending return gear is rotated on the spring axis, The resilient restoring member is twisted at the downward gear portion and the upward gear portion to accumulate the resilient restoring force and to return the downward strap or the upward strap. Slim roll blinds.

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