Slat fixture for blind and blind

Abstract

To provide a slat fixture for a blind that is difficult for a ladder cord to get caught and can maintain smooth operation of slats, and a blind.SOLUTION: In a slat fixture for a blind, a slat clip 100 and a blind 10 are attached to a slat 16, thereby fixing the slat to a ladder cord 14. The slat fixture for a blind comprises: a base 110 positioned facing one surface of the slat; a locking claw 120 that locks the other surface of the slat from both edges of the slat in a short direction; a wall 130 rising from the base to face both edges of the slat in the short direction and connecting the base and the locking claw; and a guide portion 140 formed around an outer periphery of the base and having a first guide surface 142 extending in an inclined manner that is capable of guiding the ladder cord to the outside of the wall. Such a configuration makes it difficult for the ladder cord to get caught and enables smooth operation of the slat to be maintained.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a blind slat fixing device and a blind. [Background technology]

[0002] A conventional blind slat fastener is known from JP 2016-180219 A (Patent Document 1). The blind slat fastener, a slat clip, shown in the document is substantially H-shaped and includes two parallel bases and a connecting part connecting the bases. At both ends of each base, a claw part is formed that can engage with the edge of the slat. In addition, a notch having an inclined part at the edge is formed at the center of each base.

[0003] According to this configuration, by attaching the blind slat fixing device to the slat, the slat can be fixed to the ladder cord, and the lifting cord can be guided into the cutout portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-180219 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional blind slat fasteners as described above, the vertical cords of the ladder cords are folded back to the left and right as the slats are raised. Therefore, when the slats are lowered from the raised and folded state, the vertical cords that have been folded back to the left and right tend to return to the position where they are fixed to the slats. However, at this time, there is a problem that the vertical cords may get caught in the blind slat fasteners, hindering the smooth lowering and rotating movements of the slats.

[0006] The present invention has been made in consideration of such problems, and its object is to provide a blind slat fixing device and a blind that are less likely to get caught on the ladder cord and that can maintain smooth operation of the slats. [Means for solving the problem]

[0007] In order to solve the above problems, according to a first aspect of the present invention, there is provided a blind slat fastener capable of fixing a slat to a ladder cord, characterized in that it comprises a base arranged facing one side of the slat, a locking claw portion that locks the other side of the slat from both short edges of the slat, a wall portion that rises from the base so as to face both short edges of the slat and connects the base and the locking claw portion, and a guide portion formed on the outer periphery of the base and having a first guide surface extending at an angle that is capable of guiding the ladder cord to the outside of the wall portion.

[0008] This configuration improves the effect of preventing the ladder cord from getting caught, thereby maintaining smooth operation of the slats. In particular, when the slats are lowered from their folded state, the ladder cord is less likely to get caught on the blind slat fixing device when the ladder cord, which has been folded back to the left and right, attempts to return to the position where it is fixed to the slat, so that the lowering and rotating operations of the slats can be maintained appropriately.

[0009] The present invention can be applied in various ways. For example, the first guide surface may be formed continuously from the position where the wall portion stands to the position where it overlaps with the surface of the slat. With this configuration, a thick wall (step) that restricts the guiding of the ladder cord is not formed at the position where the edge of the slat and the blind slat fastener intersect, so that the effect of preventing the ladder cord from getting caught is further improved.

[0010] The guide portion may further include a second guide surface formed on the wall portion, and the second guide surface may be an inclined surface formed continuously from an upper end of the wall portion to the first guide surface so as to allow the ladder cord to move while sliding against the wall portion. With this configuration, the ladder cord can be guided along the wall portion so as to escape while sliding against the second guide surface, and therefore the ladder cord can be guided more smoothly without getting caught.

[0011] The second guide surface may be a curved surface. With this configuration, the ladder cord is less likely to get caught, and can be guided more smoothly.

[0012] Furthermore, according to a second aspect of the present invention, there can be provided a blind comprising the blind slat fastener according to the first aspect of the present invention.

[0013] This configuration improves the effect of preventing the ladder cord from getting caught, thereby maintaining smooth operation of the slats. In particular, when the ladder cord is folded back to the left and right and returns to the position where it is fixed to the slat when the slat is lowered from the folded state, the ladder cord is less likely to get caught on the blind slat fixing device, making it possible to provide a blind that can maintain the lowering and rotating operations of the slats in an optimal manner.

[0014] The blind slat fixing device may further include a drum device capable of rotating and raising and lowering the slats, and a drive shaft for driving the drum device, and the drum device may raise and lower the slats while rotating them when the slats start to rise and fall. This configuration can also be applied to blinds in which the ladder cords are likely to get caught in the blind slat fixing device when the slats are raised and lowered. Effect of the Invention

[0015] According to the blind slat fastener and blind of the present invention, the ladder cord is less likely to get caught, and the smooth operation of the slats can be maintained. Other effects of the present invention will be described in the detailed description of the invention below. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a front view of a blind 10 incorporating a slat clip 100. [Diagram 2] 1 is a perspective view showing a state in which a slat 16 is fixed to a ladder cord 14 by a slat clip 100, as viewed from above. [Diagram 3] 1 is a perspective view of a slat clip 100 attached to a slat 16, as viewed from below. [Figure 4] FIG. 2 is a perspective view of the slat clip 100. [Diagram 5] FIG. 2 is a front view of the slat clip 100. [Figure 6] FIG. 1 is a perspective view showing a slat clip 200 of a first comparative example. [Figure 7] 1A and 1B are diagrams for explaining the movement of the ladder cord 14 relative to the slat clip 100 in comparison with the slat clip 200 of the first comparative example, where (a) is a front view showing the slat clip 200 of the first comparative example, and (b) is a front view showing the slat clip 100 of the present embodiment. [Figure 8] FIG. 2 is a front view for explaining the operation of a blind 10 using a slat clip 200 of a first comparative example when the blind 10 is lowered. [Figure 9] FIG. 2 is a front view for explaining the operation of the blind 10 using the slat clip 100 when lowering. [Figure 10] FIG. 11 is a perspective view showing a slat clip 300 of a second comparative example. [Figure 11] 1A and 1B are bottom views of a slat clip 300 of a second comparative example and the slat clip 100 of this embodiment, where (a) is the slat clip 300 of the second comparative example and (b) is the slat clip 100 of this embodiment. [Figure 12] 1A and 1B are front views of a slat clip 300 of a second comparative example and the slat clip 100 of this embodiment, where (a) is the slat clip 300 of the second comparative example and (b) is the slat clip 100 of this embodiment. [Figure 13] 1A and 1B are perspective views of a slat clip 300 of a second comparative example and the slat clip 100 of this embodiment, where (a) is the slat clip 300 of the second comparative example and (b) is the slat clip 100 of this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals, and duplicated explanations will be omitted.

[0018] A blind 10 incorporating a slat clip 100 according to one embodiment of the present invention will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a front view of the blind 10 incorporating a slat clip 100 (a blind slat fastener) according to this embodiment. Fig. 2 is a perspective view of a long slat 16 fixed to a ladder cord 14 by the slat clip 100, as viewed from above.

[0019] As shown in Figure 1, the blind 10 is composed of a head box 12 fixed to a window frame or the like (not shown) with brackets 11, a ladder cord 14 hanging down from the head box 12 so as to be tiltable, a number of slats 16 supported in an aligned state on the ladder cord 14, a slat clip 100 attached to the uppermost slat 16 supported by the ladder cord 14 and fixing the ladder cord 14 and the slats 16, a bottom rail 18 to which the lower end of the ladder cord 14 is connected, a lifting cord 20 hanging down from the head box 12 along the side edge of the slat 16 so as to be liftable and whose lower end is connected to the bottom rail 18, and an operating member 22 hanging down from one end of the head box 12 for operating the ladder cord 14 and the lifting cord 20.

[0020] 1, a drive shaft 24 that is rotated by an operating member 22 is provided in the head box 12 in the longitudinal direction. The drive shaft 24 can operate a drum device 26 that raises and lowers the slats 16 and rotates them.

[0021] The upper end of the ladder cord 14 is connected to the drum device 26. The slats 16 tilt as the ladder cord 14 is wound around and unwound from the drum device 26. The ladder cord 14 tilts in response to a certain range of rotation of the drum device 26, and slips and does not follow any further rotation of the drum device 26. The upper end of the lifting / lowering cord 20 is connected to the drum device 26. The slats 16 rise and fall as the lifting / lowering cord 20 is wound around and unwound from the drum device 26.

[0022] As shown in Fig. 2, the ladder cord 14 is composed of front and rear vertical cords 14a and a middle cord 14b that connects the front and rear vertical cords 14a together. The front and rear vertical cords 14a are arranged along the short edge of the slat 16. The middle cord 14b is composed of two cords, one above and one below, and supports the slat 16 inserted between the two middle cords 14b. The lifting cord 20 is arranged along one of the front and rear vertical cords 14a.

[0023] As shown in Fig. 2, the slat 16 is inserted between the upper and lower middle cords 14b and supported by the ladder cord 14. One of the short edges of the slat 16 is formed with a notch 16a through which the ladder cord 14 and the lift cord 20 are inserted. The slat 16 supported by the uppermost middle cord 14b of the ladder cord 14 is fixed to the ladder cord 14 by a slat clip 100 as shown in Fig. 1.

[0024] When the slat 16 rises or falls, the tilting of the ladder cord 14 and the lifting / lowering cord 20 are started simultaneously by the drum device 26. That is, when the slat 16 is raised, the ladder cord 14 is tilted in one direction so that the slat 16 is in the incompletely closed state, while the lifting / lowering cord 20 is raised. On the other hand, when the slat 16 is lowered, the ladder cord 14 is tilted in the other direction so that the slat 16 is in the incompletely closed state so that the slat 16 is in the fully closed state, while the lifting / lowering cord 20 is lowered. When the slat 16 starts to lower, the slat 16 is lowered while remaining in a substantially horizontal state while the slat 16 is rotating from the incompletely closed state to the fully closed state. At this time, the vertical cord 14a of the ladder cord 14 is loosened due to the winding and unwinding of the ladder cord 14 accompanying the above-mentioned operation.

[0025] (Slat Clip 100) Next, the slat clip 100, which is a characteristic component of this embodiment, will be described with reference to Figs. 3 to 5 in addition to Fig. 2. Fig. 3 is a perspective view of the slat clip 100 attached to the slat 16, as viewed from below. Fig. 4 is a perspective view of the slat clip 100. Fig. 5 is a front view of the slat clip 100.

[0026] As shown in Figures 2 and 3, the slat clip 100 is a blind slat fastener capable of fixing the slat 16 to the ladder cord 14 by being attached to the slat 16. As shown in Figures 3 and 4, the slat clip 100 includes a base 110 disposed facing one side of the slat 16, locking claws 120 that lock the other side of the slat 16 from both edges of the slat 16 in the short side direction, a wall 130 that stands up from the base 110 so as to face both edges of the slat 16 in the short side direction and connects the base 110 and the locking claws 120, and a guide 140 that can guide the ladder cord 14 to the outside of the wall 130. The slat clip 100 is configured symmetrically in the length direction and the width direction.

[0027] (base 110) As shown in Fig. 3, the base 110 is configured in a substantially I-shape and has a length that spans the entire width of the slat 16. As shown in Fig. 4, the base 110 has a groove 112 formed in the center in the width direction over substantially the entire length in the length direction. As shown in Fig. 2, one of the two middle cords 14b is disposed in the groove 112, and the middle cord 14b is sandwiched between the groove 112 and one surface of the slat 16 to restrict movement of the slat 16 in the longitudinal direction. In addition, notches 114 are formed at both ends of the groove 112 in the longitudinal direction. The vertical cord 14a and the lift cord 20 are inserted into the notch 114.

[0028] (Latching claw portion 120) As shown in Fig. 4, two locking claws 120 are provided on each of both longitudinal ends of the base 110, sandwiching the groove 112 therebetween. As shown in Fig. 2, the locking claws 120 lock the other surface of the slat 16 from both short edge portions of the slat 16.

[0029] (Wall part 130) As shown in FIG. 2, the walls 130 rise from the base 110 at both longitudinal ends of the base 110 so as to face both lateral edges of the slat 16 , and connect the base 110 and the locking claws 120 .

[0030] (Guide part 140) 5, the guide portion 140 has a first guide surface 142 and a second guide surface 144, and is configured to be able to guide the ladder cord 14 to the outside of the wall portion 130. The first guide surface 142 is formed so as to extend continuously in an inclined manner on the outer periphery of the base portion 110 from the position where the wall portion 130 stands to the position where it overlaps with the surface of the slat 16. The second guide surface 144 is a curved inclined surface that is continuously formed from the upper end of the wall portion 130 to the first guide surface 142. The second guide surface 144 allows the vertical cord 14a of the ladder cord 14 to move while being in sliding contact with the wall portion 130.

[0031] The configuration of the slat clip 100 of this embodiment has been described above. Next, the operation of the slat clip 100 of this embodiment will be described while comparing it with a slat clip 200 of a first comparative example, which is a known slat clip.

[0032] (First Comparative Example) First, the configuration of the slat clip 200 of the first comparative example will be described with reference to FIG. 6. FIG. 6 is a perspective view showing the slat clip 200 of the first comparative example. The slat clip 200 does not include the guide portion 140 of the slat clip 100 of this embodiment. The other components, the base portion 210, the groove portion 212, the notch portion 214, the locking claw portion 220, and the wall portion 230, are also included in the slat clip 200 of the first comparative example, and have the same functions as the slat clip 100 of this embodiment. Therefore, detailed descriptions of the configuration of each portion will be omitted. The slat clip 200 is configured symmetrically in the length direction and the width direction.

[0033] The functions of the slat clip 100 of this embodiment and the slat clip 200 of the first comparative example will be described with reference to Fig. 7. Fig. 7 is a diagram for explaining the movement of the ladder cord 14 relative to the slat clip 100 in comparison with the slat clip 200 of the first comparative example.

[0034] (a) Comparison of configurations 7(a), in the slat clip 200 of the first comparative example, the vertical cord 14a that has moved to the side in the width direction of the slat clip 200 is likely to get caught on the wall portion 230 because the position where the wall portion 230 and the slat 16 intersect is a vertical and high wall. Therefore, the movement of the vertical cord 14a is restricted, and it is difficult for the vertical cord 14a to move to the position of the notch 214.

[0035] On the other hand, in the slat clip 100 of this embodiment, as described above and shown in Fig. 7(b), the first guide surface 142 is continuously formed from the position where the wall portion 130 stands to the position where it overlaps with the surface of the slat 16, and the second guide surface 144 is a curved inclined surface continuously formed from the upper end of the wall portion 130 to the first guide surface 142. Therefore, the vertical cord 14a that has moved laterally in the width direction of the slat clip 100 is guided to the wall portion 130 along the first guide surface 142 and the second guide surface 144 that continue from the slat 16, and easily moves along the wall portion 130 to the position of the notch 114.

[0036] (b) Comparison of movements during descent Next, the operation of the blind 10 when it is lowered in the case where the slat clip 100 of this embodiment is used and in the case where the slat clip 200 of the first comparative example is used will be described with reference to Figs. 8 and 9. Fig. 8 is a front view for explaining the operation of the blind 10 when it is lowered in the case where the slat clip 200 of the first comparative example is used. Fig. 9 is a front view for explaining the operation of the blind 10 when it is lowered in the case where the slat clip 100 is used.

[0037] First, the lowering operation of the blind 10 using the slat clip 200 of the first comparative example will be described. When the blind 10 starts to lower, the slats 16 stacked on a bottom rail (not shown) are lowered in a substantially horizontal state as shown in Fig. 8(a). In this state, the vertical cord 14a is folded so as to go around the side in the width direction of the slat clip 200. Also, as described above, the vertical cord 14a is loosened due to the winding and unwinding of the ladder cord 14.

[0038] As the slat 16 descends, as shown in Fig. 8(b), the vertical cord 14a stretches and moves toward the notch 214 of the slat clip 200 where the vertical cord 14a is fixed to the slat 16. At this time, the vertical cord 14a may get caught on the wall 230, and as shown in Fig. 8(c), the catch may not be easily resolved even if the slat 16 continues to descend.

[0039] Even if the slat 16 is released from the caught state while it is descending, the sudden release of tension will cause the slat 16 to vibrate, which is not aesthetically pleasing. In addition, the slat 16 starts to rotate from the state shown in Fig. 8(c), but the caught vertical cord 14a is still not released, which may hinder smooth descent and rotation.

[0040] Next, the lowering operation of the blind 10 using the slat clip 100 of this embodiment will be described. When the blind 10 starts to lower, as in the first comparative example, the slats 16 stacked on the bottom rail 18 (not shown) are lowered in a substantially horizontal state as shown in Fig. 9(a). In this state, the vertical cord 14a is folded so as to go around the side of the slat clip 100 in the width direction.

[0041] 9(b), as the slat 16 descends, the vertical cord 14a stretches and moves toward the notch 114 of the slat clip 100, where the vertical cord 14a is fixed to the slat 16. At this time, the vertical cord 14a is guided by the first guide surface 142 and the second guide surface 144 to the outside of the wall portion 130 without being caught by the slat clip 100.

[0042] When the slat 16 further descends, as shown in FIG. 9(c), the vertical cord 14a further moves in the direction of the notch 114 of the slat clip 100, but moves smoothly along the wall portion 130.

[0043] Even if the vertical cord 14a gets caught in the state shown in Fig. 9(c), when the slat 16 starts to rotate from the state shown in Fig. 9(c), the vertical cord 14a is guided by the first guide surface 142 and the second guide surface 144 to the outside of the wall portion 130. That is, the slat clip 100 of this embodiment has a shape that makes it easy to eliminate the catch of the vertical cord 14a not only during the downward movement of the slat 16 but also during the rotation of the slat 16. As a result, the smooth downward movement and rotation of the slat 16 can be more suitably maintained.

[0044] The above has been a description of the slat clip 100 of this embodiment compared with the slat clip 200 of the first comparative example. Next, a description will be given of the slat clip 100 compared with the slat clip 300 of the second comparative example.

[0045] (Second Comparative Example) First, the slat clip 300 of the second comparative example will be described with reference to FIG. 10. FIG. 10 is a perspective view showing the slat clip 300 of the second comparative example. As shown in FIG. 10, the slat clip 300 has a third guide surface 342 and a fourth guide surface 344 that constitute a guide portion 340 having a different configuration from the guide portion 140 of the slat clip 100 of this embodiment. The other components, that is, the base portion 310, the groove portion 312, the notch portion 314, the locking claw portion 320, and the wall portion 330, are also provided in the slat clip 300 of the second comparative example, and have the same functions as the slat clip 100 of this embodiment. Therefore, detailed explanations of the configurations of each portion will be omitted. The slat clip 300 is configured symmetrically in the length direction and the width direction.

[0046] The configurations of the guide portion 140 of the slat clip 100 of this embodiment and the guide portion 340 of the slat clip 300 of the second comparative example will be described with reference to Figs. 11 to 13. Fig. 11 is a bottom view of the slat clip 300 of the second comparative example and the slat clip 100 of this embodiment, (a) being the slat clip 300 of the second comparative example, and (b) being the slat clip 100 of this embodiment. Fig. 12 is a front view of the slat clip 300 of the second comparative example and the slat clip 100 of this embodiment, (a) being the slat clip 300 of the second comparative example, and (b) being the slat clip 100 of this embodiment. Fig. 13 is a perspective view of the slat clip 300 of the second comparative example and the slat clip 100 of this embodiment, (a) being the slat clip 300 of the second comparative example, and (b) being the slat clip 100 of this embodiment.

[0047] As shown in FIG. 11(a), when the slat clip 300 of the second comparative example is attached to the slat 16, the end of the third guide surface 342 of the guide portion 340 is disposed on the edge of the slat 16. That is, the third guide surface 342 is formed only on the outer periphery of the wall portion 330, and is not formed to a position where it overlaps with the surface of the slat 16. Also, as shown in FIG. 12(a), the fourth guide surface 344 is a curved inclined surface that is continuously formed from the upper end of the wall portion 330 to the third guide surface 342. In this way, since the end of the third guide surface 342 is disposed on the edge of the slat 16, the height of the slat clip 300 intersecting with the edge of the slat 16 is the height obtained by adding the thickness of the third guide surface 342 to the thickness of the fourth guide surface 344. Therefore, the slat clip 300 is configured as a vertical and tall wall at the position where it intersects with the slat 16. 13(a), in such a slat clip 300, the vertical cord 14a of the ladder cord 14 is likely to get caught at a position where it intersects with the slat 16. As a result, similar to the slat clip 200 of the first comparative example described above with reference to FIG. 8, the vertical cord 14a may get caught on the slat clip 300 while the slat 16 is descending, which may hinder the smooth descending and rotating motion of the slat 16.

[0048] On the other hand, in the slat clip 100 of this embodiment, as described above, as shown in FIG. 11(b), the first guide surface 142 is continuously formed from the position where the wall portion 130 stands to the position where it overlaps with the surface of the slat 16. Also, as shown in FIG. 12(b), the second guide surface 144 is a curved inclined surface continuously formed from the upper end of the wall portion 130 to the first guide surface 142. In this way, since the end of the first guide surface 142 is continuously formed to the position where it overlaps with the surface of the slat 16, the height of the slat clip 300 intersecting with the edge of the slat 16 is approximately the same height as the other surface of the slat 16. Therefore, as shown by the arrow a in FIG. 12(b) and the arrow b in FIG. 13(b), the slat clip 300 is guided by the wall portion 130 by the first guide surface 142 and the second guide surface 144, and is movable along the wall portion 130.

[0049] (Effects of this embodiment) As described above, according to this embodiment, the effect of preventing the ladder cord 14 from getting caught is improved, thereby maintaining smooth movement of the slat 16. In particular, when the slat 16 is lowered from the folded up state, the ladder cord 14 is less likely to get caught on the slat clip 100, so that the lowering and rotating movements of the slat 16 can be favorably maintained.

[0050] Furthermore, since no thick wall (step) that would restrict the guidance of the ladder cord 14 is formed at the position where the edge of the slat 16 and the slat clip 100 intersect, the effect of preventing the ladder cord 14 from getting caught is further improved.

[0051] Furthermore, since ladder cord 14 can be guided along wall portion 130 so as to be released while being in sliding contact with second guide surface 144, ladder cord 14 can be guided more smoothly without getting caught.

[0052] Furthermore, by making second guide surface 144 a curved surface, ladder cord 14 is less likely to get caught, and ladder cord 14 can be guided more smoothly.

[0053] Furthermore, since the effect of preventing the ladder cord 14 from getting caught is improved, it is possible to provide a blind 10 that can maintain smooth movement of the slats 16. In particular, since the ladder cord 14 is less likely to get caught on the slat clips 100 when the slats 16 are lowered from the folded up state, it is possible to provide a blind 10 that can optimally maintain the lowering and rotating movements of the slats 16.

[0054] It can also be applied to blinds 10 in which the ladder cords 14 are likely to get caught on the slat clips 100 when the slats 16 are raised or lowered. It is particularly advantageous for blinds 10 configured such that when the slats 16 are lowered from the folded up state, the slats 16 descend a predetermined distance while remaining substantially horizontal, and then continue to descend as they rotate.

[0055] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an example. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0056] For example, in the above embodiment, the first guide surface 142 is configured to be continuously formed from the position where the wall portion 130 stands to the position where it overlaps with the surface of the slat 16, but the present invention is not limited to this example. As long as the ladder cord is not easily caught and the smooth operation of the slat can be maintained, it can be designed arbitrarily. For example, it does not have to be configured to overlap with the surface of the slat.

[0057] In the above embodiment, the guide portion 140 further has the second guide surface 144 formed on the wall portion 130, and the second guide surface 144 is an inclined surface formed continuously from the upper end of the wall portion 130 to the first guide surface 142 so that the ladder cord 14 can move while sliding against the wall portion, but the present invention is not limited to this example. Any design can be used as long as the ladder cord is not likely to get caught and the smooth operation of the slats can be maintained. For example, the second guide surface does not necessarily have to be provided.

[0058] In the above embodiment, the second guide surface 144 is a curved surface, but the present invention is not limited to this example. As long as the ladder cord is not easily caught and the smooth operation of the slats can be maintained, the second guide surface can be designed arbitrarily. For example, the second guide surface may be a flat surface.

[0059] In the above embodiment, the slat clip 100 is applied to a blind 10 that includes a drum device 26 capable of rotating and raising and lowering the slats 16, and a drive shaft 24 that drives the drum device 26, and that, when the slats 16 start to rise or fall, the drum device 26 raises or lowers the slats 16 while rotating them, but the present invention is not limited to this example. For example, the slat clip 100 may be applied to a blind that raises or lowers after the slats have rotated.

[0060] In the above embodiment, the slat clip 100 is applied to the manual blind 10 in which the slats 16 are raised, lowered, and rotated by operating the operating member 22, but the present invention is not limited to this example. For example, the slat clip 100 may be applied to an electric blind. [Explanation of symbols]

[0061] 10 Blinds 11 Bracket 12 Head Box 14 Ladder Code 14a Vertical Code 14b middle chord 16 Slats 16a Notch 18 Bottom Rail 20 Lifting cord 22 Operating member 24 Drive shaft 26 Drum unit 100 Slat Clip (Slat Fixing Device) 110, 210, 310 base 112, 212, 312 Groove 114, 214, 314 Notch 120, 220, 320 Locking claw 130, 230, 330 wall section 140, 340 Guide part 142 First guide surface 144 Second guide surface 200 Slat clip of the first comparative example 300 Slat clip of second comparative example 342 Third guide surface 344 4th guide surface

Claims

1. A blind slat fastener capable of fastening a slat to a ladder cord, A base portion disposed facing one surface of the slat; A locking claw portion that locks the other surface of the slat from both edges of the slat in the short side direction; a wall portion that rises from the base portion so as to face both edges of the slat in a short side direction and connects the base portion and the locking claw portion; a guide portion having a first guide surface formed on an outer periphery of the base portion and extending in an inclined manner so as to be capable of guiding the ladder cord to the outside of the wall portion; A blind slat fixing device comprising:

2. The blind slat fastener according to claim 1, wherein the first guide surface is formed continuously from a position where the wall portion stands to a position where the first guide surface overlaps with the surface of the slat.

3. The guide portion further includes a second guide surface formed on the wall portion, The blind slat fastener according to claim 1 or 2, characterized in that the second guide surface is an inclined surface formed continuously from the upper end of the wall portion to the first guide surface so as to allow the ladder cord to move while sliding against the wall portion.

4. 4. The blind slat fastener according to claim 3, wherein the second guide surface is a curved surface.

5. A blind comprising the blind slat fixing device according to claim 1.

6. A drum device capable of rotating and raising and lowering the slats; A drive shaft that drives the drum device; Further comprising:

6. The blind according to claim 5, wherein the drum device raises and lowers the slats while rotating them when the slats start to rise and fall.

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