KR20160095331A - Electromotive blind apparatus - Google Patents

Abstract

The present invention relates to a blind device of which structure is improved to make the elevation operation and inclination angle operation of each of multiple light shielding wings sequential while overlapping odd lines and even lines of the light shielding wings with each other by comprising an operating unit of which the structure is simple by using a motor and an operating shaft. According to the present invention, the electric blind device includes: an operating shaft placed in a case and normally or reversely operated by the rotation of an operating motor; a tilting drum inserted into the operating shaft to be rotated with the rotation of the operating shaft; a winding drum combined with the operating shaft to be moved in a longitudinal direction of the operating shaft by rotational force of the operating shaft; a support bracket fixed to the case, and guiding the movement of the winding drum; a center string elevating the light shielding wings, vertically placed in multiple lines in the bottom of the case, by being wound on or unwound from the outer surface of the winding drum; a first clip member elastically combined with the outer surface of the tilting drum, and of which both end parts are connected with first and second control strings; a second clip member elastically combined with the outer surface of the tilting drum, of which both end parts are connected with third and fourth control strings; an interlocking unit operating the light shielding wings depending on a rotation angle of the first and second clip members to the winding drum; and a holding bracket fixed to the case, holding the tilting drum, and guiding the first, second, third, and fourth control strings.

Description

[0001] ELECTROMOTIVE BLIND APPARATUS [0002]

The present invention relates to an electric blind apparatus, and more particularly, to an electric blind apparatus having a simple structure using a single driving motor and a driving shaft, a plurality of shading blades being individually controlled in operation, or a shading angle of light- The present invention relates to an electric blind device having a structure that is improved in the structure of the present invention so as to reduce user's convenience and cost by adjusting the light shielding efficiency of the sunlight according to the user's choice by finely adjusting the shading angle .

In general, blinds are important for the beauty of harmony with interiors in buildings, but development trends are also clear in order to reduce energy consumption based on the shading function. For example, there has been a steady increase in interest and demand for blinds that can adjust the degree of sun altitude according to the season or the degree of opening and closing partly in accordance with living conditions in the living room.

Korean Patent Laid-Open Publication No. 2004-0022628 discloses a "sectional blind", which includes upper and lower rails provided on the upper side and lower side of a window, a lift rail which is installed horizontally between the upper and lower rails and is movable up and down, Are provided in the upper and lower rails and extend in the lateral direction of the raising and lowering rails respectively and then extend in the longitudinal direction along the upper or lower side of the raising and lowering rails Or an elastic member which is folded and has the same quantity as the above-mentioned region.

Accordingly, it is possible to adjust the proportions of at least two stretching zones divided into upper and lower zones, thereby revealing that the functions of the blinds are more diversified and the usage method is relatively agile.

"Horizontal blind with upper and lower ends operated" in Korean Registered Utility Model No. 0364683, comprises an upper support provided on the upper part of the horizontal blind wing bundle; An upper support tow line connected to the upper support to adjust the angle of the upper end of the bundle of wings; A lower support tow line connected to the lower support and pulling the bottom of the bundle of wings; A pull rod stopping device for pulling the lower support pull string to stop at one side of the upper housing to pull the lower end; And a top pulling failure which is installed on one side of the upper housing to pull the upper end and winds the shading adjustment line (front) and the shading adjustment line (rear).

Accordingly, it is possible to effectively shield light from top to bottom or from bottom to top according to the will of the user, and in particular to protect the top of the room from the outside without blocking the top.

Other prior art related to the blinds is to be mounted inside the case, as disclosed in Korean Patent Laid-Open Publication No. 10-2012-076049 entitled " Blind Driving Device and Blind Including It, " The driving device of the blind is coupled to a drive shaft rotated by a user's operation and winds up or unwinds the center line connected to the blinds provided at the lower part of the case to raise and lower the blind blades, A slider connected to the drive shaft and rotatable in place and having a thread protruding from a part of an outer circumferential surface thereof, a slider coupled to the thread, slidable in a longitudinal direction of the case, and a part of the blades, And a setting line fixed to the slider after the direction is changed in the case.

However, the above-mentioned prior arts are complicated in the overall structure of the blinds, so that they are large in appearance and high in fear of malfunction. Furthermore, it is difficult to adjust the light-shielding functions of the upper and lower areas after the blinds are installed, thereby deteriorating the efficiency of energy saving. In other words, there is a high possibility that unnecessary cold flood demand will be caused if the sunlight level of the vertical blinds is not changed according to the sun height in the summer season and the winter season.

In addition, in the prior art, it is necessary to individually control the inclination angle of the light-shielding blades and the up-and-down adjustment of the light-shielding blades separately from each other, and in the case of the light-shielding wings in which the overlapping operation of the light- The respective shading blades can not be individually tilted as described above. As a result, the distance between the overlapping light-shielding blades increases greatly, so that the degree of shading decreases. In addition, There is a disadvantage that it can not be controlled and maintained.

Korean Registered Utility Model No. 0364683 entitled "Horizontal type blind operated by upper and lower ends" (registered on October 4, 2004) Korean Patent Laid-Open No. 10-2012-076049 entitled " Blind Driving Device and Blind Including the Blind "

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to provide a driving device of a simple structure using one driving motor and a driving shaft, The blind apparatus having a structure in which the lifting and lowering operation of each light-shielding blade and the tilt angle adjusting operation are sequentially performed by the stepwise pulling operation of the string member.

It is another object of the present invention to provide an electric blind apparatus having an improved structure so that the inclination angle of each of the light-shielding blades can be finely adjusted individually.

According to an aspect of the present invention, there is provided a driving apparatus including a driving shaft disposed in a case and rotated forward and backward in response to rotation of a driving motor, a tilting drum inserted in the driving shaft and rotated in conjunction with rotation of the driving shaft, A support bracket fixed in the case and guiding the movement of the winding drum, and a support bracket that is wound or unwound on the outer circumferential surface of the winding drum at the time of rotation of the winding drum, A first clip member having a center line for lifting and lowering a plurality of light-shielding blades arranged upward and downward in a plurality of rows, a first clip member elastically coupled to an outer circumferential surface of the tilting drum and having first and second adjustment straps connected to both ends thereof, A second clip member elastically coupled to the outer circumferential surface of the drum and having third and fourth adjusting straps connected to both end portions thereof, Interlocking means for operating the light-shielding blades in accordance with the rotation angle of the clip member, and a mounting bracket fixed to the case, for mounting the tilting drum and guiding the first, second, .

The interlocking means may include a first connection cord provided to connect the first and fourth adjustment straps to each other to operate the operation of the light shielding vanes corresponding to odd rows of the light shielding vanes, And a second connecting cord for operating the operation of the light-shielding blades corresponding to the even-numbered columns among the light-shielding blades.

The first connection string connects the first and fourth adjustment straps to each other so as to couple both sides of the light-shielding vanes corresponding to the odd-numbered rows of the light-shielding vanes, and the second connection string connects the both sides of the light- The second and third adjustment straps are connected to each other.

Wherein the mounting bracket has an extension surface extending from one side of the mounting bracket to an upper side to limit an angle of rotation of the first and second clip members in a reverse direction and protruding upward from a bottom end of the mounting bracket on the other side, A stopper portion for restricting the stopper portion is formed.

A hollow that is formed on the outer circumferential surface of the drive shaft and is recessed in the longitudinal direction, a hollow that is formed in the tilting drum so as to sandwich the drive shaft and has a locking protrusion corresponding to the fitting groove on an inner circumferential surface thereof, And a through hole formed in the inner circumferential surface to form an interlocking protrusion corresponding to the fitting groove so that the tilting drum and the winding drum are rotated together when the driving shaft rotates.

 The present invention has a simple structure using one driving motor and a driving shaft, and can control a plurality of light-shielding blades individually, or can finely control the shading angle of light-shielding blades in a pair of overlapping states, So that the efficiency of light shielding of the sunlight can be adjusted according to the user's selection, thereby increasing the convenience of the user and saving the cost.

1 is a perspective view showing a configuration of an electric blind apparatus according to the present invention;
FIG. 2 is a perspective view showing a combined state of a tilting drum and a winding drum with respect to a drive shaft of the present invention. FIG.
3 is an exploded perspective view of a tilting drum and a winding drum of the present invention.
4 is an exploded perspective view showing a state before coupling of the tilting drum and the mounting bracket of the present invention.
5 is a perspective view showing the interlocking means of the present invention.
FIGS. 6A, 6B, 6C, and 6D are views schematically illustrating the operation of the light-shielding blades according to the phase difference of both ends of the first and second clip members when the drive shaft is driven in the forward direction. FIGS. 2 schematically shows the operation of the light-shielding blades according to the phase difference of both ends of the clip member.

1 to 6, the electric blind apparatus according to the present invention includes a drive shaft 155 disposed in the case 10 and rotated in forward and reverse directions by the rotational force of the drive motor 150, A tilting drum 200 that is inserted into the driving shaft 155 and is rotated in conjunction with rotation of the driving shaft 155, a winding drum 300 coupled to the driving shaft and moved in the longitudinal direction of the driving shaft 155 when the driving shaft 155 rotates, A support bracket 400 fixed in the case 10 and guiding the movement of the winding drum 300 and a support bracket 400 wound around or wound on the outer circumferential surface of the winding drum 300 during rotation of the winding drum 300, A center line 650 for raising and lowering the light shielding blades 20 disposed on the lower side of the tilting drum 200 in a plurality of rows and columns, A first clip member 230 to which the 1,2 adjustment straps 610 and 620 are connected, A second clip member 240 elastically coupled to the outer circumferential surface and having third and fourth adjustment straps 630 and 640 connected to both ends thereof and a second clip member 240 connected to the first and second clip members 230 and 240 The tilting drum 200 is fixed to the case 10 and the first, second, third and fourth adjusting straps 610, 620, 630 and 640 are guided by the interlocking means, And a bracket 500.

The driving shaft 155 is cylindrical in shape and has a fitting groove 155a in the longitudinal direction on the outer circumferential surface thereof and is fitted into the tilting drum 200 and the winding drum 300 to be inserted therethrough, And the winding drum 300 are rotated in the forward and reverse directions.

The drive shaft 155 is formed such that the fitting protrusion 155b protrudes in the longitudinal direction on the inner peripheral surface thereof.

The coupling between the drive shaft 155 and the drive motor 150 is interposed between the couplers 160 to transmit the rotational force of the drive motor 150 to the drive shaft 155.

To this end, a coupling groove 162 corresponding to the fitting protrusion 155b is formed on the outer circumferential surface of the coupler 160 in a concave shape.

The tilting drum 200 is provided with a hollow 202 so that a screw thread is formed on an outer circumferential surface thereof and a drive shaft 155 is inserted into the hollow shaft 202. The inner circumferential surface of the hollow 202 is engaged with the fitting groove 155a of the drive shaft 155, (205) is formed to protrude.

The tilting drum 200 is formed with first and second guide grooves 210 and 220 for guiding the first and second clip members 230 and 240 to be rotatable along the outer circumference, respectively.

The first and second clip members 230 and 240 are resiliently coupled to the outer periphery of the first and second guide recesses 210 and 220 and are interlocked and rotated when the tilting drum 200 rotates.

The first clip member 230 is provided with a first binding portion 235 in the form of a knot facing one another so that the first adjusting strap 610 and the second adjusting straps 620 are connected to one end and the other end, The second clip member 240 has a structure in which a knot-shaped second coupling portion 245 is provided at one side and the other end of the second clip member 240 so as to connect the third control strap 630 and the fourth control strap 640.

The first and second binding portions 235 and 245 of the first and second clip members 230 and 240 are formed such that both ends of the knot shape are opposed to each other.

The winding drum 300 is formed with a male thread to be screwed with the inner circumferential surface of the support bracket 400 on the outer circumferential surface and a through hole 302 is formed in the center so that the drive shaft 155 penetrates and is coupled. And an interlocking protrusion 305 corresponding to the fitting groove 155a protrudes.

Since the support bracket 400 is fixed to the case 10 and the female screw is formed on the inner peripheral surface of the support bracket 400 and is screwed to the outer circumference of the winding drum 300, And performs a function of guiding the movement.

The center line 650 has a structure in which one end portion is connected to be fixed to the winding drum 300 and the other end portion is fixed to the lower end portion of the lowermost light blocking blade 20 through each of the light blocking blades 20, 300 so as to be wound around the outer circumferential surface of the winding drum 300.

The light-shielding vane 20 is composed of a plurality of odd-numbered rows and even-numbered rows as seen from the side, and is arranged on the lower side of the case 10 in the up and down directions.

The mounting bracket 500 is formed at one side with an extending surface 510 extending upward from the bottom and restricting a rotation angle of the first and second clip members 230 and 240 in a reverse direction, And a stopper portion 515 for limiting the forward rotation angle of the first clip member 230 is formed.

The receiving bracket 500 is provided at a position where the bottom of the case 10 communicates with the receiving bracket 500. The receiving bracket 520 is formed on the bottom surface of the receiving bracket 500 to penetrate through the second and fourth adjusting straps 620 and 640, And a plurality of connection holes 530 are formed in the bottom surface spaced apart from the bottom surface 520 of the main body 500 so that the first and third adjustment straps 610 and 630 are perforated.

The first and third adjustment straps 610 and 630 are arranged in an X-shaped shape which is staggered once after passing through the connection holes 530 of the mounting bracket 500.

The first, second, third and fourth adjustment straps 610, 620, 630, 640 can manipulate the operation of the respective light-shielding blades 20 by the interlocking means, and the interlocking means can connect the first and fourth adjustment straps 610, A first connection cord 710 for operating the operation of the light shielding blades 20 corresponding to odd rows of the light shielding blades 20 and a second connection string 710 for connecting the second and third control straps 620 and 630 to each other, And a second connection cord 720 for operating the operation of the light-shielding blades 20 corresponding to the even-numbered columns among the light-shielding blades 20.

The first connecting strap 710 connects the first and fourth adjusting straps 610 and 640 to each other in a knot shape so as to connect the both sides (one side, the other side) of the light shielding blades 20a corresponding to the odd rows, Has a structure in which the second and third adjusting straps 620 and 630 are connected to each other in a knot shape so as to bind both sides of the light shielding blades 20b corresponding to the even-numbered columns.

Thus, the first and second connection strings 710 and 720 can adjust the shading angle by rotating the light-shielding blades 20 according to the phase difference of the first, second, third, and fourth adjustment straps 610, 620, 630, and 640, And has a function of operating the corresponding shading blades 20a and 20b to overlap each other.

When the user drives the driving motor 150, the driving shaft 155 is rotated in the forward and reverse directions. When the driving shaft 155 is driven in the forward and reverse directions, And is rotated in the reverse direction.

When the tilting drum 200 rotates, the first and second clip members 230 and 240 tightly coupled to the outer circumferential surface of the tilting drum 200 are rotated in conjunction with each other. In accordance with the rotation of the first and second clip members 230 and 240, The first, second, third, and fourth adjustment straps 610, 620, 630, and 640 connected to both ends of the clip members 230 and 240 are different from each other.

For example, when the first and second clip members 230 and 240 are positioned on the same axial line with respect to the outer circumferential length direction of the tilting drum 200, as shown in FIGS. 6A and 6B, the second and fourth adjusting straps 620 and 640 And the first and third control straps 610 and 630 have the same phase, so that the light-shielding blades 20a corresponding to the odd-numbered columns and the light-shielding blades 20b corresponding to the even-numbered columns overlap each other.

The first and second clip members 230 and 240 are rotated in the same direction in conjunction with the tilting drum 200 when the tilting drum 200 rotates in the forward direction according to the rotation of the drive shaft 155. The first and second clip members 230 and 240 Shielding blades 20a corresponding to the odd-numbered rows and the light-shielding blades 20b corresponding to the even-numbered columns are overlapped with each other in a pair, the shading angle is adjusted.

6A, when the first and second clip members 230 and 240 are in contact with the upper end of the extension surface 510 of the mounting bracket 500, the light shielding blade 20a (corresponding to the odd-numbered column and the even- And 20b are kept in a standing state with respect to the lower surface of the case 10 in a state where they are overlapped with each other in a pair.

When the drive shaft 155 is rotated in the forward direction, the tilting drum 200 is rotated in the forward direction and the first and second clip members 230 and 240 are rotated in conjunction with each other. As shown in FIG. 6B, The first and second clip members 230 and 240 are rotated in the state of being close to each other until the light shielding blades 20 are brought into contact with the stopper portion. At this time, the light shielding blades 20 are overlapped on the lower side of the case 10 Thereby maintaining a horizontal state.

The first clip member 230 has a structure in which the rotation angle of the first clip member 230 is interfered with the stopper portion 515 during the rotation operation so that the first clip member 230 is rotated by the stopper piece The rotation of the first and second clip members 230 and 240 is restricted by the interference between the first and second coupling parts 235 and 245 of the first and second clip members 230 and 240.

When the first and second binding portions 235 and 245 of the first and second clip members 230 and 240 are spaced apart from each other as shown in FIG. 6C due to the rotation of the tilting drum 200, The adjustment straps 620 and 640 and the first and third adjustment straps 610 and 630 have different phase differences (different elevations) so that the odd-numbered light-shielding blades 20a and the even-numbered light-shielding blades 20b, which are overlapped with each other, As the distance between the first and second coupling parts 235 and 245 of the first and second clip members 230 and 240 is varied, the shading angle can be adjusted while the respective light-shielding blades 20 are spaced apart from each other. .

Each of the light shielding blades 20 is positioned at the bottom of the case 10 as shown in FIG. 6C until the second clip member 240 reaches the bottom of the mounting bracket 500 when the second clip member 240 rotates, So that it has an inclination angle with respect to the side surface. In this case, it is possible to partially block the sunlight.

At this time, according to the rotation of the driving shaft 155 and the tilting drum 200, the interval between the first and second binding portions 235 and 245 of the first and second clip members 230 and 240 can be adjusted, ) Can be finely adjusted.

The second clip member 240 is rotated by the rotational force when the tilting drum 200 is rotated in the forward direction by the drive shaft 155 and then is caught by the bottom surface of the mounting bracket 500 and is no longer rotated. 6D, the light-shielding blades 20a and 20b corresponding to the odd-numbered columns and the even-numbered columns are positioned perpendicular to the lower surface of the case 10, As shown in FIG.

At this time, the rotation operation of the light-shielding blades 20a corresponding to the odd-numbered columns is controlled by the first connection string 710 bound to both sides of the light-shielding blades 20a corresponding to the odd rows, Are variable according to the phase difference of the first and fourth adjustment straps 610 and 640, respectively, so that the angle of the light-shielding vanes 20a corresponding to the odd-numbered columns can be finely adjusted.

On the other hand, the rotation operation of the light-shielding blades 20b corresponding to the even-numbered columns is controlled by the second connection string 720 bound to both sides of the light-shielding blades 20b corresponding to the even- Has the advantage that the angles of the light-shielding blades 20b corresponding to the even-numbered rows can be finely adjusted according to the height difference of the second and third control straps 620 and 630 as described above.

When the driving shaft 155 is rotated in the opposite direction, the tilting drum 200 is rotated in the reverse direction to rotate the first and second binding portions 235 and 245 of the first and second clip members 230 and 240 by the stopper portion 515 The first and second clip members 230 and 240 are rotated in the reverse direction. During the rotation of the first and second clip members 230 and 240 while the gap between the first and second coupling parts 235 and 245 is rotated, The rotation of the member 230 is interrupted by interfering with the end of the extension surface of the mounting bracket 500 and then the rotation of the second clip member 240 continues to gradually increase the distance between the first and second binding portions 235 and 245 .

That is, until the first clip member 230 interfered with the stopper portion 515 is brought into contact with the upper end of the extended surface 510 during the backward driving of the tilting drum 200, And the first clip member 230 is first brought into contact with the upper end of the extended surface 510 to limit the rotation angle.

6E and 6F, when the interval between the first and second coupling parts 235 and 245 of the first and second clip members 230 and 240 is wide, the reverse driving of the tilting drum 200 is performed in the odd- The shading blades 20a and 20b are adjusted by the first and second connecting straps 710 and 720 to be adjusted to be close to the horizontal angle with respect to the lower surface of the case 10, Gradually becomes closer to the first clip member 230, and is variably adjusted so as to be close to the vertical state.

Accordingly, the range of the rotation angle of the first clip member 230 of the present invention is restricted by the stopper piece 410 and the extension surface 510 of the mounting bracket 500 when the tilting drum 200 rotates, The range of the rotation angle of the clip member 240 is restricted by the bottom surface of the mounting bracket 500 and the extending surface 510 when the tilting drum 200 rotates.

When the driving shaft 155 is further driven in the normal direction with the rotation angle of the first and second clip members 230 and 240 being restricted, the tilting drum 200 is idly rotated, and the winding drum is rotated by the driving shaft, The light shielding blades 20 are lowered by the weight of the light shielding blade 20 while the center line 650 wound on the tilting drum 200 is loosened and the driving shaft 155 is driven in the reverse direction, The center line 650 is wound around the outer periphery of the winding drum 300 so that the light shielding blades 20 are lifted.

At this time, the winding drum 300 rotates like the tilting drum 200 when the driving shaft rotates, but when the tilting drum 200 is rotated in the forward and reverse directions, the first and second clip members 230 and 240 are rotated The rotation of the tilting drum 200 is idled and the rotational force of the driving shaft 155 acts on the rotational movement of the winding drum 300 to rotate the center line 650 Or moves the center line 650 up and down.

That is, according to the present invention, the driving shaft 155 is rotated in the forward and reverse directions by the rotational force of the driving motor 150, and the first and second The clip members 230 and 240 are rotated and a phase difference occurs between the first, second, third and fourth control straps 610, 620, 630 and 640 during rotation of the first and second clip members 230 and 240, And the second and third control straps 620 and 630 are coupled to be able to operate the respective light shielding blades 20 by the first and second connection straps 710 and 720, The angle adjustment in the state where the pair of the light-shielding blades 20 are overlapped can be performed in a stepwise manner, so that the light-shielding angle of the light-shielding blades 20 can be finely adjusted.

Accordingly, in the present invention, a plurality of light-shielding blades can be individually controlled with a simple structure using one driving motor 150 and a driving shaft, or the light-shielding angle of the light-shielding blades can be finely adjusted in a stepwise manner The light shielding efficiency of the sunlight can be adjusted according to the user's choice by finely adjusting the shading angle, thereby improving the convenience of the user and reducing the cost.

10: Case 20: Shading blade
20a, 20b: Shading blades corresponding to odd columns and even columns
150: drive motor 155: drive shaft
155a: fitting groove 155b: fitting projection
160: coupler 162: connection groove
200: tilting drum 202: hollow
205: engaging protrusion 210, 220: first and second guide grooves
230, 240: first and second clip members 235: first binding portion
245: second binding portion 300: winding drum
302: through hole 305: cooperating projection
400: Support bracket 500: Mounting bracket
510: extension surface 515: stopper portion
520: receiving ball 530: connecting ball
610, 620, 630, 640: 1st,
650: center line 710, 720: first and second connecting straps

Claims (5)

A driving shaft 155 disposed in the case 10 and rotated forward and backward in accordance with the rotation of the driving motor 150 and a tilting drum 200 inserted in the driving shaft 155 and rotated in conjunction with rotation of the driving shaft 155, A take-up drum 300 coupled to the drive shaft 155 and moved in the longitudinal direction of the drive shaft 155 by a rotational force of the drive shaft 155, a support bracket 150 fixed in the case and guiding the movement of the take- A plurality of light shielding blades 20 are disposed on the lower side of the case 10 so that the light shielding blades 20 are moved up and down by a plurality of rows in the case of rotating the winding drum 300 And a center line 650,
A first clip member 230 elastically coupled to an outer peripheral surface of the tilting drum 200 and having first and second adjustment straps 610 and 620 connected to both ends thereof,
A second clip member 240 elastically coupled to the outer peripheral surface of the tilting drum 200 and having third and fourth adjusting straps 630 and 640 connected to both ends thereof,
Interlocking means for operating the light shielding blades 20 according to the rotation angle of the first and second clip members 230 and 240 relative to the winding drum 300,
And a mounting bracket (500) fixed to the case (10) and guiding the first, second, third, and fourth adjustment straps (610, 620, 630, 640) with the tilting drum (200) mounted thereon. The method according to claim 1,
The interlocking means includes a first connection cord 710 provided to connect the first and fourth adjustment straps 610 and 640 to each other to operate the operation of the light shielding vanes 20a corresponding to odd rows of the light shielding vanes 20,
And a second connection cord 720 provided to connect the second and third control straps 620 and 630 to each other to control the operation of the light-shielding vanes 20b corresponding to the even-numbered columns of the light- Electric blind device. The method of claim 2,
The first connection cord 710 connects the first and fourth adjustment straps 610 and 640 to each other so as to couple both sides of the light shielding vanes 20a corresponding to the odd rows of the light shielding vanes 20,
And the second connecting strap 720 connects the second and third adjusting straps 620 and 630 to each other so as to couple the both sides of the light shielding blades 20b corresponding to the even numbered rows of the light shielding blades 20. [ Device. The method according to claim 1,
The mounting bracket 500 is formed at one side with an extended surface 510 extending upward from the bottom to limit the reverse rotation angle of the first and second clip members 230 and 240,
And a stopper portion (515) protruding upward from the bottom end of the other end to limit a rotation angle of the first clip member (230). The method according to claim 1,
A fitting groove 155a formed on the outer circumferential surface of the driving shaft 155 to be concave in the longitudinal direction,
A hollow 202 formed in the tilting drum 200 to fit the drive shaft 155 and having an engagement protrusion 205 corresponding to the fitting groove 155a formed on an inner circumferential surface thereof,
And a through hole 302 formed in the winding drum 300 so as to fit the drive shaft 155 and having an inner peripheral surface formed with an interlocking protrusion 305 corresponding to the fitting groove 155a,
Wherein the tilting drum (200) and the winding drum (300) are rotated together when the drive shaft (155) is rotated.

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