JP7210159B2 - BLIND - Google Patents

Description

The present invention relates to blinds.

A conventional blind is disclosed in Japanese Patent Application Laid-Open No. 2014-218827 (Patent Document 1). The document includes a plurality of first and second ladder cords depending from the headbox, the first ladder cord being engaged with the notch of the slat and the second ladder cord being engaged with the notch of the slat. It is disclosed that the second lifting cord is not engaged and depends on the opposite side of the slat, the second lifting cord being movable into a second connection provided on the second ladder cord.

According to this, in the first ladder cord, the notch of the slat and the ladder cord are less likely to disengage, and in the second ladder cord, the opening of the slat is suppressed, thereby preventing lateral displacement of the slat. It has the effect of simultaneously preventing the opening of the slats.

JP 2014-218827 A

However, in the conventional blind as disclosed in Patent Document 1, when the slats are horizontal, the width of the uppermost slat is larger than the position where the ladder cord is led out from the head box. A force that tries to approach each other acts on the slats due to the weight of the slats. Therefore, the uppermost slat has a problem in that the slat edges are subject to a pressing force from the longitudinal direction due to the warp threads of the ladder cords, impairing the rotational performance, and the slats do not rotate smoothly.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of such problems, and an object of the present invention is to provide a blind in which the slats can be smoothly rotated.

In order to solve the above problems, according to the present invention, a plurality of ladder cords suspended from a head box and having a plurality of middle cords between a pair of front and rear vertical cords, and an aligned state by the middle cords of the ladder cords. A blind comprising a plurality of slats supported by and an elevating cord for elevating the slats, and at least at the edge of the uppermost slat, at all locations where the ladder cord is arranged, Provided is a blind characterized by having a retraction portion for suppressing pressure from the vertical cord.

According to this configuration, at least one of the front and rear longitudinal cords is arranged so as to overlap the retraction portion by providing the retraction portion at all locations where the vertical cords of the ladder cord hang down at least on the uppermost slat. becomes. Therefore, it is possible to reduce the pressing force of the front and rear longitudinal cords on the slat edges, and to smoothly rotate the slats. In addition, since at least one of the front and rear longitudinal cords is arranged in the retracted portion when the slat is lowered, the resistance to the slat edge is reduced, and the slat can be lowered smoothly.

Various applications are possible for the present invention. The following application examples can be combined as appropriate.
For example, the middle cord may be fixed to the slats by slat clips at all locations where the retraction portions are provided. Since the middle cord and the slat are fixed by the slat clip at the position of the retraction portion, the ladder cord and the slat are fixed by the slat clip without being displaced.

Further, the retraction portion may be a recess formed in at least one of the front and rear edge portions of the slat, and the vertical cord may be inserted through the recess. By forming the retraction portion on at least one of the front and rear edges of the slat (on the exterior side), when the slat is rotated to the fully closed angle, the retraction portion overlaps with the adjacent slat or the flange of the head box. It is possible to prevent light from leaking from the opening and improve the shielding property.

Further, the retraction portion may be formed such that the opening widens from the bottom toward the rear edge of the uppermost slat. Since the opening is formed so that it widens from the bottom toward the rear edge of the uppermost slat, even if the ladder cord once enters the retraction portion while the slat is being assembled to the ladder cord, it will not come out of the retraction portion. Cheap.

Further, the retraction portion may be formed in a shape in which the edge portion on the opening side is rounded. In this way, by forming the edge of the opening side of the retraction portion into a shape with rounded corners, such as a sloped surface or a curved surface, the ladder cord is less likely to get caught in the retraction portion when the slat is assembled to the ladder cord. improve sexuality.

In addition, the lower slats other than the slats provided with the retraction portions are formed with notches through which the lifting cords or the middle cords are inserted in order to prevent the lateral displacement of the slats. The width of the slat in the longitudinal direction or the lateral direction may be larger than that of the notch. By making the retraction portion larger than the notch portion, alignment adjustment for inserting the vertical cord through the retraction portion is facilitated.

Further, the retraction portions include first retraction portions provided at both ends of the slat and second retraction portions provided at other portions, and the first retraction portion is closer to the slat than the second retraction portion. The width in the longitudinal direction or the lateral direction may be increased. When the ladder cord and the slat are assembled, the second retraction portion is less likely to get caught on the ladder cord, thereby improving the ease of assembly.

Further, the retraction portion may be formed with a slope portion along the angle of the vertical cord hanging down from the headbox. With such a configuration, it is possible to reduce the pressing force on the uppermost slats, and it is possible to perform the rotation of the slats more smoothly.

ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the blind by which the rotational motion of a slat is performed smoothly. Other effects of the present invention will also be described in the mode for carrying out the invention, which will be described later.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the whole blind 100 structure which concerns on 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 2 is a cross-sectional view taken along the line BB of FIG. 1; FIG. 4 is a diagram for explaining the slats 140, (a) is a plan view of the uppermost slat 140-1, and (b) is a lower slat 140-2 excluding the uppermost slat 140-1. It is a top view. FIG. 10 is a plan view showing the state in which the slat 140 and the ladder cord 120 are assembled, (a) showing the uppermost slat 140-1, and (b) lower than the uppermost slat 140-1. is a diagram showing a slat 140-2 of . 1 is a cross-sectional view of a conventional blind 600; FIG. It is a figure for demonstrating operation|movement of the blind 100. FIG. FIG. 12 is a diagram for explaining the blind 200 according to the second embodiment, (a) is a plan view of the uppermost slat 240-1, and (b) is the uppermost slat 240-1 and the ladder. 4 is a plan view showing a state in which the cord 220 is assembled; FIG. FIG. 13 is a diagram for explaining a blind 300 according to a third embodiment, (a) is a plan view of the uppermost slat 340-1, and (b) is the uppermost slat 340-1 and the ladder. 4 is a plan view showing a state in which the cord 320 is assembled; FIG. FIG. 10 is a diagram for explaining the uppermost slat 440-1 of the blind 400 of the fourth embodiment, (a) is a plan view of the retraction portion 442, and (b) is a cross-sectional view of the retraction portion 442; is. It is a sectional view of blind 400 of a 4th embodiment. FIG. 10 is a diagram for explaining the arrangement of ladder cords 520 and lifting cords 560 on the uppermost slat 540-1 according to the numbers.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

(First embodiment)
First, the overall configuration of the blind 100 according to the first embodiment will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a diagram showing the overall configuration of a blind 100 according to this embodiment. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a cross-sectional view along BB in FIG.

The blind 100 of this embodiment has a plurality of ladder cords 120 suspended from a head box 110 and having a plurality of middle cords 126 between a pair of front and rear longitudinal cords 122 and 124, and the middle cords 126 of the ladder cords 120 are aligned. a plurality of slats 140 supported on the slats 140 and a lifting cord 160 for lifting the slats 140. At least at the edges of the uppermost slat 140-1, at all locations where the ladder cords 120 are arranged, a retraction portion 142 for suppressing pressure from the vertical cords 122 and 124 is provided. Each component will be described in detail below.

(Headbox 110)
The headbox 110 is fixed to a window frame, ceiling, or the like via a bracket 112 . Inside the head box 110, as shown in FIG. 1, a rotating shaft 114 is rotatably arranged over substantially the entire length in the longitudinal direction. In the head box 110, winding drums 116 capable of winding and unwinding the ladder cord 120 and the lifting cord 160 are arranged at regular intervals in the longitudinal direction. A rotating shaft 114 is inserted through the winding drum 116 so as to rotate integrally therewith.

An operation unit 118 is provided at one end of the headbox 110 . The operation unit 118 operates the opening/closing and elevation of the slats 140 . One end of the rotary shaft 114 is connected to the operation unit 118 . The operation unit 118 has an operation code 119 and can rotate the rotating shaft 114 by operating the operation code 119 .

(Ladder code 120)
Ladder cord 120 rotatably supports slat 140 . As shown in FIG. 1, the ladder cords 120 are arranged at five locations in the longitudinal direction of the headbox 110 and support the plurality of slats 140 in alignment. As shown in FIG. 2, the ladder cord 120 has a plurality of intermediate cords 126 between a pair of front and rear vertical cords 122, 124. As shown in FIG. The upper ends of the longitudinal cords 122 , 124 are connected to the winding drum 116 . The construction of the vertical cords 122, 124 and the winding drum 116 is similar to that of a general blind.

Middle cords 126 of each ladder cord 120 support slats 140 . The longitudinal cords 122 , 124 are led in a figure eight from the headbox 110 toward the top slat 140 - 1 supported by the top middle cord 126 . Therefore, the pressing force from the vertical cords 122 and 124 is mainly applied to the uppermost slat 140-1. The lower ends of the longitudinal cords 122, 124 are connected to a bottom rail 180 positioned below the row of slats 140 as shown in FIG.

At positions where the ladder cords 120 at both ends and the ladder cord 120 in the center are arranged, as shown in FIG. The lifting cords 160 are arranged on the rear side (outdoor side) of the slats 140 at the positions of the ladder cords 120 at both ends, and on the front side (inside the room) of the slats 140 at the positions of the central ladder cords 120 . Lifting cords 160 are arranged along the longitudinal cords 122 , 124 . For example, the positions of the ladder cords 120 at both ends are arranged along the rear longitudinal cords 124 as shown in FIG.

(Slat 140)
The slat 140 is a shielding material that shields or opens the opening. As shown in FIG. 1, the plurality of slats 140 are supported in alignment by the ladder cords 120, and rotate as the ladder cords 120 tilt. The slats 140 are mounted on the middle cords 126 of all the ladder cords 120 arranged in the longitudinal direction of the head box 110, or assembled with the ladder cords 120 by being inserted between the upper and lower middle cords 126. attached.

As shown in FIG. 4, the slats 140 have different shapes between the uppermost slat 140-1 and the lower slats 140-2 except for the uppermost stage. FIG. 4 is a diagram for explaining the slats 140, (a) is a plan view of the uppermost slat 140-1, and (b) is a lower slat excluding the uppermost slat 140-1. 140-2 is a plan view.

As described above, the uppermost slat 140-1 is pressed by the vertical cords 122 and 124. As shown in FIG. Therefore, as shown in FIG. 4(a), the uppermost slat 140-1 has recesses that suppress pressure from the vertical cords 122 and 124 at all locations where the rear edge ladder cords 120 are arranged. (Retreat part) 142 is provided. The recessed portion 142 is configured to have a larger width in the longitudinal direction or the lateral direction of the slat 140 than the notch portion 144 provided in the lower slat 140-2 except for the uppermost stage, which will be described later. The width of the slat 140-1 is narrowed at the position where the recess 142 is provided.

In this embodiment, the width of the concave portion 142 in the lateral direction of the uppermost slat 140-1 is set in consideration of the light shielding properties (light leakage) of the blind 100. FIG. That is, the width of the recessed portion 142 is such that when the slat 140 overlaps the slat 140-2 located second from the top when the slat 140 is fully closed, or when it overlaps the flange portion of the head box 110 when the slat 140 is fully closed reversely, It is set so that there is no light leakage from the concave portion 142 .

Lower slats 140-2 excluding the uppermost tier, as shown in FIG. 4(b), are formed with notches 144 through which the lifting cord 160 or middle tier cord 126 is inserted in order to prevent lateral displacement of the slats 140-2. It is The notches 144 are provided at both ends of the slat 140-2, and are arranged so that the lifting cord 160 or the middle cord 126 can be inserted therethrough. ing. Also, the opening end of the notch 144 is formed into a curved surface. By providing the cutouts 144 only at both ends of the slats 140-2 and making the cutouts 144 in such a size and shape, when assembling the ladder cord 120 and the slats 140-2, which will be described later, , the catching of the ladder cord 120 on the notch 144 can be suppressed as much as possible, and the ease of assembly can be improved.

A state in which the slat 140 constructed in this manner is assembled to the ladder cord 120 will be described with reference to FIGS. 2 to 4 and further to FIG. FIG. 5 is a plan view showing the state in which the slat 140 and the ladder cord 120 are assembled, (a) showing the top slat 140-1, and (b) showing the top slat 140-1. Figure 1 shows lower slat 140-2 except 1;

When assembling the uppermost slat 140-1 to the ladder cords 120, the slats 140-1 are sequentially placed on the middle cords 126 of all the ladder cords 120 as described above. In the uppermost slat 140-1 placed on the middle cord 126 in this way, the rear vertical cord 124 is arranged in each concave portion 142 as shown in FIG. 5(a). Since the recessed portion 142 is configured to have a larger width in the longitudinal direction or the lateral direction of the slat 140 than the notch portion 144, it is easy to adjust the alignment for inserting the vertical cord 124 later. 3, in addition to the rear vertical cords 124, the lifting cords 160 that hang down along the rear vertical cords 124 are arranged in the concave portions 142 at both ends.

The uppermost slat 140-1 is simply placed on each middle cord 126 and slides on the middle cord 126 to move. Therefore, each middle cord 126 and the uppermost slat 140-1 are fixed by a slat clip 190 at the position of the recess 142, as shown in FIG. 5(a). A common slat clip can be used for the slat clip 190 .

The slat clip 190 is arranged such that the narrower portion in the front-rear direction is located inside the uppermost slat 140-1 in the width direction than the recess 142. As shown in FIG. For example, when the lateral width of the recess 142 is 3.5 to 4.0 mm, the slat clip 190 is positioned about 4.0 mm from the edge of the uppermost slat 140-1. Thus, the slat clip 190 fixes the ladder cord 120 and the uppermost slat 140-1 without positional deviation.

When the ladder cord 120 and the uppermost slat 140-1 are assembled in this way, the rear vertical cord 124 is accommodated in the recess 142 as shown in FIGS. The interval between the front and rear vertical cords 122, 124 is narrowed accordingly. Therefore, the angle formed by the vertical cords 122, 124 and the uppermost slat 140-1 is increased, and the pressing of the uppermost slat 140-1 is suppressed.

Here, the angle formed by the vertical cords and the uppermost slats of the blind 100 of this embodiment and the conventional blind 600 will be described with reference to FIGS. 2 and 6. FIG. FIG. 6 is a cross-sectional view of a conventional blind 600. As shown in FIG. In addition, the conventional blind 600 is assumed to be a blind in which the recess 142 is not provided in the uppermost slat 140-1 of the blind 100 of this embodiment, and the size of each part is the same as that of the blind 100 of this embodiment. Assume that there is In the conventional blind 600, the ladder cord 620 is fixed to the uppermost slat 640-1 by slat clips 690, as shown in FIG. The angle between the front and rear longitudinal cords 622, 624 led out from the head box 610 and the uppermost slat 640-1 is 69 degrees.

On the other hand, in the blind 100 of this embodiment, as shown in FIG. The angle formed by the vertical cords 122, 124 and the uppermost slat 140-1 is 75 degrees. As described above, in the blind 100 of the present embodiment, the pressure exerted by the vertical cords 122, 124 on the uppermost slat 140-1 is reduced. In both the present embodiment and the conventional blind, the value of the angle between the vertical cord and the uppermost slat is an example.

When the lower slats 140-2 other than the uppermost slat 140-1 are assembled to the ladder cords 120, the ladder cords 120 at both ends are placed between the upper and lower middle cords 126 as described above. 2 is inserted, and the other middle cords 126 are sequentially inserted between the front and rear longitudinal cords 122 and 124 so as to be placed on top. The lower slats 140-2 assembled in this way, except for the uppermost slat 140-1, have lifting cords 160 through which middle cords 126 are inserted, as shown in FIG. 5(b). placed. Lateral longitudinal cords 124 are positioned outside cutouts 144 as shown in FIG.

(lifting code 160)
The lifting cord 160 lifts the slat 140 . The lift cords 160 are located at the ends and center of the slats 140 as previously described, as shown in FIG. The lifting cords 160 at both ends are arranged on the rear side of the slats 140 , and the central lifting cords 160 are arranged on the front side of the slats 140 . The lifting cord 160 is connected to the winding drum 116 at its upper end so that it can be wound up and unwound. A lower end of the lifting cord 160 is connected to the bottom rail 180 . The lifting cord 160 is wound up or unwound on the lifting cord 160 by the rotation of the winding drum 116, and the bottom rail 180 moves up and down, thereby moving up and down the slat 140. As shown in FIG.

The overall configuration of the blind 100 has been described above. The operation of the blind 100 will be described below with reference to FIG. FIG. 7 is a diagram for explaining the operation of the blind 100. FIG.

When the slat 140 is rotated, the operation unit 118 is operated by the operation cord 119 to rotate the winding drum 116 via the rotation shaft 114 to wind or wind the longitudinal cords 122, 124 before and after the ladder cord 120. solve. For example, when the slats 140 are tilted from the horizontal state shown in FIG. 3 to the fully closed state shown in FIG. Lateral longitudinal cord 124 is unwound.

As shown in FIG. 7, when the slats 140 are tilted so that the blind 100 is fully closed, the front side of the slats 140 is tilted upward and the rear side thereof is tilted downward. At this time, the front side of the lower slat 140 overlaps the front side of the rear side of the upper slat 140 , and the rear side of the upper slat 140 is hidden by the front side of the lower slat 140 . Therefore, since the concave portion 142 of the uppermost slat 140-1 is hidden by overlapping with the front side of the lower slat 140-2, light leakage is prevented.

(Effect of the first embodiment)
As described above, according to the present embodiment, at least the uppermost slat 140-1 is provided with recesses (retraction portions) 142 at all locations where the vertical cords 122 and 124 of the ladder cord 120 hang down. At least one of the vertical cords 122 and 124 is arranged so as to overlap the recess 142 . Therefore, the front and rear longitudinal cords 122 and 124 are less likely to press the edge of the slat 140, and the slat 140 can be rotated smoothly.

At least one of the front and rear longitudinal cords 122 and 124 is arranged in the concave portion 142 when the slat 140 is lowered, so that the resistance to the edge of the slat 140 is reduced, and the slat 140 can be lowered smoothly. .

In addition, since each middle cord 126 and the uppermost slat 140-1 are fixed by the slat clip 190 at the position of the recess 142, the ladder cord 120 and the uppermost slat 140-1 are displaced by the slat clip 190. fixed without

In addition, by forming the recess 142 in at least one of the front and rear edges of the uppermost slat 140-1 (in this embodiment, formed on the rear side, which is the outdoor side), the slat 140 can be rotated to a fully closed angle. When the slat 140 overlaps with the adjacent slat 140, leakage of light from the recess 142 can be prevented, and the shielding property can be improved. In addition, when the concave portion 142 is formed at the front edge of the uppermost slat 140-1 (on the front side, which is the interior side), light leakage from the concave portion 142 can be prevented by overlapping with the flange portion of the head box 110. can be done.

Further, by making the recessed portion 142 larger than the cutout portion 144 , it becomes easy to adjust the alignment for inserting the later vertical cord 124 into the recessed portion 142 .

(Second embodiment)
A configuration of a blind 200 according to the second embodiment will be described with reference to FIG. 8A and 8B are diagrams for explaining the blind 200 according to the present embodiment, where (a) is a plan view of the uppermost slat 240-1, and (b) is a plan view of the uppermost slat 240-1. and a ladder cord 220 are assembled. The blind 200 of this embodiment differs from that of the first embodiment in the shape of the retraction portion 242 of the uppermost slat 240-1. In this embodiment, the points different from the first embodiment will be mainly described. Constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

The ladder cord 220, the front vertical cord 222, the rear vertical cord 224, the lifting cord 260, and the slat clip 290 of the present embodiment are the ladder cord 120, the front vertical cord 122, and the rear vertical cord 124 of the first embodiment. , the lifting cord 160, and the slat clip 190, the description is omitted.

The retraction portion 242 provided on the uppermost slat 240-1 is, as shown in FIG.
It is a recess formed so that the opening widens from the bottom 242a toward the rear edge of the uppermost slat 240-1, and both ends and the opening of the lowermost slat 240-1 in the longitudinal direction of the uppermost slat 240-1. Both ends of 242b are formed into curved surfaces.

The uppermost slat 240-1 configured in this manner is sequentially inserted between the longitudinal cords 222 and 224 before and after each ladder cord 220 when assembled to the ladder cord 220, as in the first embodiment. and place it on the middle cord 226 . At this time, the retraction portion 242 is formed such that the opening widens from the bottom portion 242a toward the rear edge portion of the uppermost slat 240-1, and both ends of the bottom portion 242a and both ends of the opening portion 242b are curved surfaces. , the vertical cords 222 and 224 are prevented from being caught in the retracted portion 242, and the assembling efficiency is improved.

The uppermost slat 240-1 assembled to the ladder cord 220 in this way, as shown in FIG. Lateral vertical cords 224 are arranged in the portions 242, and lifting cords 260 are also arranged in the retracted portions 242 at both ends.

(Effect of Second Embodiment)
As described above, according to the present embodiment, when the ladder cord 220 and the uppermost slat 240-1 are assembled, the retraction portion 242 is less likely to get caught on the ladder cord 220, thereby improving assembling efficiency.

(Third embodiment)
A configuration of a blind 300 according to the third embodiment will be described with reference to FIG. 9A and 9B are diagrams for explaining the blind 300 according to the present embodiment, where (a) is a plan view of the uppermost slat 340-1, and (b) is a plan view of the uppermost slat 340-1. and a ladder cord 320 are assembled. The blind 300 of this embodiment differs from that of the first embodiment in the shape of the retraction portion 342 of the uppermost slat 340-1. In this embodiment, the points different from the first embodiment will be mainly described. Constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

The ladder cord 320, the front vertical cord 322, the rear vertical cord 324, the lifting cord 360, and the slat clip 390 of the present embodiment are the ladder cord 120, the front vertical cord 122, and the rear vertical cord 124 of the first embodiment. , the lifting cord 160, and the slat clip 190, the description is omitted.

As shown in FIG. 9A, the retraction portions 342 provided on the uppermost slat 340-1 consist of first retraction portions 342-1 provided at both ends and second retraction portions 342 provided at the other portions. -2, and the width of the uppermost slat 340-1 in the longitudinal direction or the width direction of the first retracted portion 342-1 is larger than that of the second retracted portion 342-2. In this embodiment, the first retracted portion 342-1 has the same shape as the retracted portion 142 of the first embodiment, and the second retracted portion 342-2 has the same shape as the notch portion 144 of the first embodiment. .

The uppermost slat 340-1 configured in this manner is sequentially inserted between the longitudinal cords 322, 324 before and after each ladder cord 320 when assembled to the ladder cord 320, as in the first embodiment. and place it on the middle cord 326 . At this time, since the first retraction portion 342-1 is wide, it is easy to position the vertical cord 324 later. Further, since the second retracting portion 342-2 has a narrow width and a curved surface at the opening end, the vertical cord 324 can be prevented from being caught later. Therefore, assemblability is improved.

When the uppermost slat 340-1 configured in this manner is attached to the ladder cord 320, the rear vertical cord 324 is attached to the first retraction portion 342-1 as shown in FIG. 9(b). and the lifting cord 360 are arranged, and only the rear vertical cord 324 is arranged in the second retraction portion 342-2.

(Effect of the third embodiment)
As described above, according to the present embodiment, when the ladder cord 320 and the uppermost slat 340-1 are assembled, the second retraction portion 342-2 is less likely to get caught on the ladder cord 320, which improves the ease of assembly. improves.

(Fourth embodiment)
A configuration of a blind 400 according to the fourth embodiment will be described with reference to FIGS. 10 and 11. FIG. 10A and 10B are diagrams for explaining the uppermost slat 440-1 of the blind 400 of the present embodiment. It is a sectional view. FIG. 11 is a cross-sectional view of the blind 400 of this embodiment. The blind 400 of this embodiment differs from the blind 100 of the first embodiment in the shape of the retraction portion 442 . In this embodiment, the points different from the first embodiment will be mainly described. Constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

Since the headbox 410, vertical cords 422, 424, slats 440, and slat clips 490 of the present embodiment correspond to the headbox 110, vertical cords 122, 124, slats 140, and slat clips 190 of the first embodiment, the description is omitted. omitted.

As shown in FIG. 10, the retracting portion 442 provided on the uppermost slat 440-1 projects in the direction of the trailing edge from the upper surface to the lower surface in the thickness direction of the uppermost slat 440-1. A slant surface 442a is formed so as to incline as shown in FIG. The slope portion 442a is formed at an angle formed by the vertical cords 422, 424 led from the head box 410 to the retraction portion 442 of the uppermost slat 440-1 and the uppermost slat 440-1, or at an angle close to this angle. It is preferable to form the slope along. An example of this angle is 75 degrees shown in FIG. 2 or an angle near 75 degrees.

In this way, by forming the slant portion 442a along the angle of the vertical cords 422 and 424 hanging down from the head box 410, the vertical cords 422 and 424 are formed on the slant portion 442a as shown in FIG. placed along. Therefore, the force with which the vertical cords 422 and 424 press the uppermost slat 440-1 is reduced.

(Effect of the fourth embodiment)
As described above, according to the present embodiment, the slope portion 442a is formed along the angle of the vertical cords 422 and 424 hanging from the retraction portion 442, so that the uppermost slat 440-1 is pressed. can be reduced, and the rotational motion of the slats 440 can be performed more smoothly.

(Fifth embodiment)
The length of the slats, the number of ladder cords and lifting cords, and the arrangement of the lifting cords are not limited to the example shown in the first embodiment. In this embodiment, another example will be described with reference to FIG. FIG. 12 is a diagram for explaining the arrangement of the number of ladder cords 520 and lifting cords 560 on the uppermost slat 540-1. In this embodiment, as an example, a case where there are seven ladder cords 520 and five lifting cords will be described.

The uppermost slat 540 - 1 is provided with retraction portions 542 corresponding to the number of ladder cords 520 . Therefore, in the case of this embodiment, as shown in FIG. 12, the uppermost slat 540-1 is provided with seven retraction portions 542. As shown in FIG. Seven ladder cords 520 are arranged in each retraction portion 542 in one-to-one correspondence.

Further, when there are five lifting cords 560, two lifting cords 560 can be arranged on the front side and three on the rear side of the uppermost slat 540-1, as shown in FIG. In such a case, the two lifting cords 560 arranged on the front side can be arranged together with the front vertical cords 522 on both sides of the center of the uppermost slat 540-1. In addition, the lifting cords 560 arranged on the rear side can be arranged together with the rear vertical cords 524 at both ends of the uppermost slat 540-1 and at the central retraction portion 542. As shown in FIG.

Thus, the length of the slats, the number of ladder cords and lifting cords, and the arrangement of the lifting cords are not limited to the example shown in the first embodiment. The length of the uppermost slat 540-1, the number of the ladder cords 520 and the lifting cords 560, and the arrangement of the lifting cords 560 in this embodiment are examples. Depending on the length of the slats and the number of ladder cords and lifting cords, the number of retraction portions and the arrangement of the lifting cords can be appropriately designed.

(Effect of the fifth embodiment)
As described above, according to this embodiment, the vertical cords 524 behind all the ladder cords 520 are arranged in the retracted portion 542 regardless of the size of the blind. Therefore, the front and rear longitudinal cords 522, 524 are less likely to press the edges of the uppermost slat 540-1, and the uppermost slat 540-1 can be rotated smoothly.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope described in the claims, and these also belong to the technical scope of the present invention. Understood.

For example, in the above embodiment, the intermediate cords are fixed to the slats by slat clips at all locations where the retraction portions are provided. Any configuration can be appropriately designed.

In the above embodiment, the lower slats, excluding the slats provided with the retraction portions, are configured to have notches through which the lifting cords or the middle cords are inserted in order to prevent lateral displacement of the slats. The present invention is not limited to this example, and can be designed as appropriate as long as it is configured to prevent lateral slippage of the slats. For example, it may be fixed with a slat clip without providing a notch.

The above-described embodiments, application examples, and modifications can be implemented in arbitrary combinations.

100, 200, 300, 400 Blind 110, 410 Headbox 112 Bracket 114 Rotating shaft 116 Winding drum 118 Operation unit 119 Operation code 120, 520 Ladder code 122, 222, 322, 422, 522 Front longitudinal code 124, 224, 324, 424, 524 Rear longitudinal cord 126 Middle cord 140, 340, 440, 640 Slats 140-1, 240-1, 340-1, 440-1, 540-1 Top slat 140-2 Lower slat 142 Recess (retraction part)
144 Notches 160, 260, 360, 460, 560 Lifting cord 180 Bottom rails 190, 290, 390, 490, 590 Slat clips 242, 342, 442, 542 Retreat portion 242a Bottom portion 242b Opening 342-1 First retraction portion 342 -2 Second retraction portion 442a Slope portion

Claims (8)

a plurality of ladder cords suspended from a headbox and having a plurality of middle cords between a pair of front and rear vertical cords;
a plurality of slats supported in alignment by the middle cord of the ladder cord;
an elevating cord for elevating the slat;
A blind comprising
At least only the rear edge of the front and rear edges of the uppermost slat is provided with a retraction portion for suppressing pressure from the vertical cord at all locations where the ladder cord is arranged. and blinds. 2. A blind according to claim 1, wherein said middle cord is fixed to said slats by slat clips at all locations where said retractions are provided. 3. The retracting portion is a recess formed in at least one of the front and rear edges of the slat, and the vertical cord is inserted through the recess. BLIND. 4. The blind according to claim 3, wherein the recess is formed so that the opening widens from the bottom toward the rear edge of the uppermost slat. 5. The blind according to claim 3, wherein the recess has a rounded edge on the opening side. The lower slats other than the slats provided with the retraction portions are formed with notches through which the lifting cords or the middle cords are inserted in order to prevent the lateral displacement of the slats, and the retraction portions are the notches. A blind according to any one of claims 1 to 5 , characterized in that the width of the slats in the longitudinal direction or the width direction is greater than that of the portion. The blind according to any one of claims 1 to 6 , wherein the retraction portion has a sloped portion formed along an angle of the vertical cord hanging from the head box. a plurality of ladder cords suspended from a headbox and having a plurality of middle cords between a pair of front and rear vertical cords;
a plurality of slats supported in alignment by the middle cord of the ladder cord;
an elevating cord for elevating the slat;
A blind comprising
At least the edges of the uppermost slat are provided with retraction portions for suppressing pressure from the vertical cords at all locations where the ladder cords are arranged,
The retraction portions include first retraction portions provided at both ends of the slat and second retraction portions provided at the other portions, and the first retraction portion is located longer in the longitudinal direction of the slat than the second retraction portion. Or a blind characterized by having an increased width in the transverse direction.

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