JP2560464Y2 - Slat angle adjustment device for horizontal blind - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slat angle adjusting device for a horizontal blind.

[0002]

2. Description of the Related Art Generally, a slat angle adjusting device, also called a blind opening / closing device for a horizontal blind, is provided with a ladder cord suspended from a head box so as to suspend a number of slats at intervals up and down. A rotary shaft (generally a rod having a polygonal cross section) is connected to a rotary shaft (generally a rod having a polygonal cross section) extending in the head box via a drum or the like, and the rotary shaft is connected to the rotary shaft via, for example, a worm-worm wheel meshing mechanism. Is known to be driven to rotate by operating means extended outside the head box,
This slat angle adjusting device can arbitrarily select a light-shielding state in which the slat is rotated forward or backward from a light-transmitting state in which the slat takes a substantially horizontal attitude.

In this slat angle adjusting device, it is necessary to rotate the slat group in a range of approximately 180 °, and since the rotary shaft or the drum has a small diameter, the rotary shaft is rotated in a range of 180 ° or more. On the other hand, if the rotation is more than necessary, the blinds may be damaged. Therefore, it is desirable to provide a stopper mechanism for restricting the rotation of the rotating shaft at a required position. In general, it is relatively easy to provide a rotation limit position if the rotation of the rotation shaft is within one rotation. Therefore, most conventional slat angle adjustment devices are provided so that rotation is performed within a range of 360 ° or less. I was

However, for example, in order to ensure that the slat is rotated by 180 ° with a smaller diameter rotating shaft or drum to obtain a desired light shielding state, it is necessary to rotate the rotating shaft in a range of 360 ° or more. There is also. In this case, it is not always easy to provide a compact mechanism for giving a rotation limit position while allowing one or more rotations.

[0005] Such a device is disclosed in
No. 87895 proposes a mechanism for providing a limit position of forward / reverse rotation while allowing the rotation axis to rotate in a range of 360 ° or more (for example, about 400 °).

[0006]

However, in the configuration proposed above, a rotating member provided rotatably with the worm gear and having an engaging projection, and a locking projection engageable with the engaging projection are provided. an annular member capable and predetermined angle rotational displacement have a need, as can be seen structures or these those shown as examples, it is necessary to combine a plurality of components of complex shape Therefore, there is a mold required to manufacture each part, the burden of managing tolerances of the manufactured parts, the complexity of assembling work, and since there are many rotating members, the contact area with the casing etc. that supports them is large, There is a problem to be solved further in order to supply inexpensively a horizontal blind, which usually sells a large number of products of the same standard, such as a large operation load due to resistance or the like.

In view of the above-mentioned current state of the art, the present inventor has made it possible to easily rotate the rotation shaft in a range of 360 ° or more while easily setting the limit positions of the forward and reverse rotations. The present invention proposes to provide a slat angle adjusting device that can be provided.

In addition, the present invention simplifies the configuration of the above-described apparatus, thereby facilitating the manufacture of each component, and greatly reducing the burden of component tolerance management. It is an object of the present invention to provide a slat angle adjusting device having a structure suitable for a slat.

Still another object of the present invention is to provide a slat angle adjusting device which has a small number of parts and has a simple shape of each part, so that an assembling operation is easy.

[0010] Another object of the present invention is to achieve the above-mentioned various objects and to make the assembled mechanism inconvenient when performing the operation of adjusting the slat angle, which is the original purpose. It is an object of the present invention to provide a device having a configuration devised so as not to cause a large frictional resistance.

[0011]

SUMMARY OF THE INVENTION A feature of the horizontal blind slat angle adjusting device of the present invention that achieves the above object is that it is disposed in a head box, and a group of slats is suspended from the head box. A slat group tilting rotation shaft to which the upper end of the suspended ladder cord is attached, and this rotation shaft is rotated by rotation of a rotary operation rod outside the head box, for example, through engagement of a worm and a worm wheel. In a horizontal blind provided with rotation driving means connected to rotate in the reverse direction and a stopper mechanism provided in a head box to give a limit position of forward and reverse rotation of the rotation shaft, the stopper mechanism is said axial radial provided in a part of the rotary shaft projection, a circular hollow portion formed in the diameter to allow rotation of more than one round of axial center of the projection Bo formed by expanding the diameter stepped radially outwardly in a certain range of circumferential lengths of the circular hollow portion
Between the ball receiving portion and the ball receiving portion from the circular hollow portion.
Both the Ru can freely move in the circumferential direction within a predetermined circumferential length of the ball receiving part is accommodated I, a positive rotation before Symbol projections
And it is in the reverse rotation pushed at constituted by a roller or ball is provided so as to move in the ball housing portion.

In the above configuration, the projection of the rotating shaft may be provided directly on the rotating shaft, or may be provided on a sleeve fitted to the rotating shaft.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on an embodiment shown in the drawings.

FIG. 4 shows a slat angle adjusting device 1 according to the present invention.
As shown in FIG. 5, a worm shaft which is installed so as to penetrate a rotary shaft 3 having a hexagonal cross section which is extended inside the head box 2 and which extends obliquely downward from the slat angle adjusting device 1. The operation rod 10 is hooked on the lower end of the rotation shaft 11. By rotating the operation rod 10, the worm wheel 14 of the sleeve 13 fitted to the rotation shaft 3 is rotated by the rotation of the worm shaft 11. It is designed to rotate. Reference numeral 4 denotes a drum (not shown) provided so as to integrally rotate at an appropriate position on the rotating shaft 3.
Is a ladder cord having an upper end connected to the slat 5 and having a suitable vertical spacing as shown in FIG. Are the same as known horizontal blinds, and their illustration and description are omitted.

The detailed structure of the slat angle adjusting device 1 of the present embodiment is shown in FIG.

The slat angle adjusting device 1 of the present embodiment is composed of two plastic molded casing plates 1 each formed by molding.
The heads 7 and 18 are formed by mounting predetermined parts therein, positioning them by fitting the holes 20 and 20 with the notches 19 and 19 provided on the respective mating surfaces, and tightening and fixing them with bolts 21. As shown in FIGS. 4 and 5, it is fitted into a predetermined position of the box 2 and assembled. 22 is a bolt hole.

One of the components incorporated in the casings 17 and 18 is the sleeve 13 having a worm wheel 14 and a projection 15. The sleeve 13 has a hexagonal shaft hole through which the rotating shaft 3 passes. Are formed.
In the casings 17, 18, circular bearing openings 17a, 1 for rotatably supporting the sleeve 13 are provided.
8a, worm wheel 13 and circular hollow portions 17b and 18b having a predetermined diameter for rotatably housing protrusions, casing 1
Ball reception portion 18c of the circular hollow portion 18b was extended diameter in a certain range of circumferential lengths of 8 provided respectively, the circular in
Across the sky section 17b, 18b from the ball storage portion 18c
The ball 23 is accommodated as shown in FIG. These round hollow
Parts, ball housings, balls, and protrusions on the sleeve.
Thus, the limits of forward rotation and reverse rotation of the rotating shaft 3
A stopper mechanism for providing a position is configured. The button
A roller that rolls the ball housing in the circumferential direction in place of the
B may be used.

The worm 12 is incorporated into the casings 17 and 18 so as to mesh with the worm wheel 13. The casings 17 and 18 are provided with semi-circular worm housing portions 17d and 18d (which together form a circular hollow portion) in which the worm shaft 11 having the worm 12 is freely rotatable around the axis. Warm storage portions 17e, 18e of a semi-circular longitudinally elongated shaft portion that accommodates the extended shaft portion (together form a circular hollow portion)
Are provided respectively.

Next, FIG. 2 is a longitudinal sectional view showing the function of the slat angle adjusting device 1 having the above configuration, and FIGS. 3 (a) to 3 (c) show the operation state in relation to the slat angle.
It will be described based on.

Assume now that the projection 15 of the sleeve 13 is at the position shown in FIG. 2, and the operation rod 10 is rotated so that the projection 15 rotates counterclockwise in FIG.

The rotation of the operation rod 10 causes the worm shaft 11 to rotate.
Are rotated, and thus the worm wheel 14 meshing with the worm 12 is rotated, so that the protrusion rotates counterclockwise. At this time, it goes without saying that the rotating shaft 3 that is angularly coupled to the sleeve also rotates in the same direction.

When the projection rotates in the counterclockwise direction in FIG. 2, the ball 23 is pressed by the projection 15. When the ball reaches the step of the ball storage portion 18c whose diameter has been expanded, further movement of the ball is restricted (see FIG. 3A), so that the operating rod 10 can be further rotated. Can not. At this time, the posture of the slat 5 is shown in FIG.
(A) It becomes a fully closed state like the lower side.

Next, when the operation rod 10 is rotated in a direction opposite to the above so that the projection 15 rotates clockwise from the state shown in FIG. 3A, the projection shown in FIG. Fifteen
The slat 5 is fully opened in a state in which
When the operation rod 10 is rotated so as to rotate in the clockwise direction, when the ball 23 reaches the step portion on the opposite side of the ball storage portion 18c whose diameter has been expanded, the ball 23 Movement is restricted (see FIG. 3C). At this time, the slat 5 is fully closed.

By repeating the above operation, the angle adjustment of the slat group in this embodiment is surely performed.

[0025]

According to the present invention, a slat angle adjusting device capable of easily providing a limit position for forward and reverse rotations while enabling the rotation shaft to rotate in a range of 360 ° or more. Can be provided.

The device of the present invention has a simple structure,
Therefore, the production of each component is easy and the burden of component tolerance management is extremely small, so that there is an effect that it is suitable for mass-producing the horizontal blind having the slat angle adjusting device of the same standard.

Furthermore, the slat angle adjusting device of the present invention has an effect that the assembling work is easy because the number of parts is small and the shape of each part is simple.

Further, in addition to the various effects described above,
Since the assembled mechanism does not have a structure that causes a large frictional resistance, there is an effect that even when a large number of products are used, the slat angle adjustment operation can be performed smoothly without variation.

[Brief description of the drawings]

FIG. 1 is an exploded view showing an example of a slat angle adjusting device for a horizontal blind according to the present invention;

FIG. 2 is a longitudinal sectional side view showing an assembled state of the slat angle adjusting device.

3A and 3B are diagrams illustrating the operation of a stopper mechanism of the slat angle adjusting device, wherein FIG. 3A is a diagram in which a ball is pressed to a limit position on one side, and FIG.
FIG. 4C is a diagram in which the ball is pressed to the limit position on the other side,

FIG. 4 is a view for explaining a connection state of the slat angle adjusting device and a rotary operation rod of a rotary shaft.

FIG. 5 is a view for explaining the relationship between the slat angle adjusting device, the ladder cord, the slat, and the rotary operation rod;

[Explanation of symbols]

1: Slat angle adjusting device, 2: Head box, 3:
Rotary axis, 4: rudder cord, 5: slat, 11: worm axis, 12: worm, 13: sleeve, 14: worm wheel, 15: protrusion, 17: casing plate, 1
8: Casing plate, 19: Botto, 20: Hole, 21: Bolt, 22: Bolt hole, 23: Ball.

Claims (3)

(57) [Scope of request for utility model registration] 1. A slat group tilting rotation shaft, which is disposed in a head box, and to which an upper end of a ladder cord hanging from the head box is hung, and the slat group is hung. A rotation drive means for a rotation shaft operatively connected to enable forward and reverse rotation operations from outside the head box, and provided in the head box so as to provide a limit position for forward rotation and reverse rotation of the rotation shaft. in horizontal blind that includes a stopper mechanism which is, diameter of the stopper mechanism, permits the projection of the axial provided in part the radial direction of the rotary shaft, the rotation of more than one round of axial center of the projection a circular hollow portion formed to the dimensions, the ball receiving portion which diameter was formed by extending the stepped radially outwardly in a certain range of circumferential lengths of the circular hollow portion, the circular hollow
And the ball
And <br/> both Ru can freely move in the circumferential direction within a predetermined circumferential length of the volume part, is pushed by the forward rotation and reverse rotation of the front Symbol projections
Roller or ball provided so as to move in the ball reception portion
And a slat angle adjusting device for a horizontal blind characterized by comprising: 2. The horizontal blind slat angle adjusting device according to claim 1, wherein the operative connection between the rotary shaft and the rotary drive means is provided through engagement of a worm and a worm wheel. 3. The horizontal blind slat angle adjusting device according to claim 1, wherein the projection of the rotating shaft is provided on a sleeve assembled so as to rotate integrally with the rotating shaft.