JP3065207B2 - Blind operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind operating device.

[0002]

2. Description of the Related Art Conventional blind operating devices include the following. For example, JP-A-60-11382
In the structure disclosed in Japanese Patent Publication No. 3 (1995) -3, a bifurcated piece is provided at each end of a hollow driving shaft and a hollow driven shaft, and both bifurcated pieces are respectively pivotally connected to one hollow connecting piece. ing. The pivotal connection between the two forks and the connecting piece is performed by fitting the projections formed at each of the connecting points of the connecting piece into the receiving holes formed at the respective connecting points of the respective fork pieces. Done. Further, the two fork pieces and the connecting piece are pivotally connected so that the center line of the two axes and the line connecting the pivot points of the connecting piece and the fork piece all pass through the center of the connecting piece.

[0003]

However, the above-mentioned conventional blind operating device has the following problems. That is, since the driving shaft, the driven shaft, the bifurcated piece and the connecting piece are hollow, the bifurcated piece is bent by a downward load applied to the operating rod, and the projection of the connecting piece is engaged with the receiving hole of the bifurcated piece. There is a problem that comes off. Further, in the above-mentioned conventional example, there is also shown one in which a washer is fitted to the tip of the projection of the connecting piece so that the projection of the connecting piece and the receiving hole of the bifurcated piece do not come off. However, there is a problem that the work is very troublesome because a washer must be fitted to each convex portion. An object of the present invention is to solve such a problem.

[0004]

According to the present invention, a projecting portion is formed at the head of a connecting pin connected to a tilter input shaft of a connecting piece so as to protrude in the axial direction of the connecting piece. The above-mentioned problem is solved by forming the one-pin receiving hole so that the radial dimension increases conically toward the outer diameter portion.
That is, the blind operating device of the present invention includes a head box (12), a plurality of slats (10) supported in alignment by a ladder cord (16), and a bottom rail disposed at a lower end of the row of slats (10). (14)
A hollow tilter input shaft (22), which extends downward from one end of the head box (12) and whose inclination of the slat (10) is variable by rotation thereof, and a tilter input shaft (2).
2) and a hollow rotary operating rod (24) that is integrally rotatable by a universal joint (28) and is connected so as to be able to change the connecting angle, and has one end connected to the bottom rail (14) and the other end. Slats (10)
A lifting / lowering cord (18) which is introduced into the head box (12) through the row, is inserted through the tilter input shaft (22) and the rotary operation rod (24) and is led out from the lower end of the rotary operation rod (24); The universal joint (28) is provided at one end of the tilter input shaft (22) so as to protrude in the axial direction at a position facing each other, and has a first pin receiving hole (50, 52) respectively. First formed
The bifurcated protruding pieces (22a, 22b) and the rotary operation rod (2
4) are provided at one end of each of the four ends so as to protrude in the axial direction, and are respectively provided with second pin receiving holes (56,
58) are formed on the second forked protruding pieces (54a, 54).
b) and coupling pins (42, 46, 4) formed thereon.
4, 48) are the first and second pin receiving holes (50, 52, 5).
6, 58) so as to be freely rotatable, and a hollow connecting piece (40) for connecting the tilter input shaft (22) and the rotary operation rod (24) integrally and for changing the connecting angle. And the connecting piece (40) connected to the tilter input shaft (22).
The coupling pins (42, 46) have projecting portions (42a, 46) projecting from their heads in the axial direction of the connecting piece (40).
a) are formed, and the tilter input shaft (2)
2) The first pin receiving holes (50, 52) are formed such that the radial dimension increases conically toward the outer diameter portion. Also, the connecting pins (42, 46) of the connecting piece (40) connected to the tilter input shaft (22) are connected to the opposite sides of the projecting portions (42a, 46a) of these heads. Alternatively, an inclined surface (42b, 46b) may be formed which inclines in the axial direction of the coupling pin (42, 46) toward the tip. In addition, the code | symbol in the said parenthesis shows the corresponding member of an Example.

[0005]

An overhanging portion is formed at the head of the connecting pin of the connecting piece connected to the tilter input shaft so as to protrude in the axial direction of the connecting piece. Each of the first pin receiving holes is formed so that the radial dimension increases in a conical shape toward, and the coupling pin having the projecting portion of the connecting piece is fitted into the first pin receiving hole of the tilter input shaft. Accordingly, even when the first bifurcated protruding piece of the tilter input shaft bends due to a downward load applied to the universal joint when the rotating operation rod is rotated, the projecting portion of the coupling pin has the first pin. Since the first pin receiving hole is caught on the conical surface of the receiving hole, it is prevented from coming out of the first pin receiving hole. Further, since the connecting pin does not come out of the first pin receiving hole without attaching a washer or the like, assembly is easy.

[0006]

1 shows a blind embodying the present invention.
A plurality of slats 10 are arranged at predetermined intervals in the vertical direction.
2 are arranged, and the bottom rail 14 is arranged on the lower end side. A ladder cord 16 is provided between the head box 12 and the bottom rail 14 to support each slat 10. The upper end of the ladder cord 16 is connected to a rotating drum (not shown) rotatably provided in the head box 12 so as to be wound and unwound. By rotating the rotating drum, slat 1
0 indicates that the inclination angle can be changed. At one end of the head box 12, a hollow tilter input shaft 22 is led out.
At the lower end of the tilter input shaft 22, a hollow grip 3 is provided at the lower end.
The hollow rotation operation rod 24 provided with 2 is integrally rotatable by a universal joint 28 and is connected so that the connection angle can be changed. Rotating operation stick 2
The rotation of 4 is transmitted to a tilter 20 provided near one end of the headbox 12 via a tilter input shaft 22. The rotation transmitted to the tilter 20 rotates a rotary drum integrally connected thereto via a rotary shaft 23.
One end of the lifting cord 18 is connected to the bottom rail 14, and the other end is inserted into an insertion hole (not shown) provided in the slat 10 and introduced into the head box 12. Through the stopper (not shown) provided near one end of the gripper, the rotation input shaft 22, the rotation operation rod 24, and the inside of the grip 32 are respectively inserted into the knobs 26 disposed below the grip 32. It is connected to be able to move up and down. The rotation operation rod 24 is provided with a cord hook 34 that can hook the elevating cord 18 derived from the lower end of the rotation operation rod 24.

FIG. 2 is an exploded perspective view of the universal joint 28. The universal joint 28 includes first forked protrusions 22 a and 22 b of the tilter input shaft 22, second forked protrusions 54 a and 54 b of the rotary operation rod 24,
And a connecting piece 40. The connecting piece 40 has 9
The coupling pins 42, 44, 46, and 48 protrude from the outer periphery of this at every 0 degree. 2 at the symmetric position of the connecting piece 40
Protrusions 42a and 46a projecting in the axial direction of the connecting piece 40 are formed on the heads of the two coupling pins 42 and 46, respectively. On the side of the heads of the coupling pins 42 and 46 opposite to the protruding parts 42a and 46a, an inclined surface 42b inclined in the axial direction of the coupling pins 42 and 46 toward the tip end.
And 46b are formed respectively. The connecting pins 44 and 48 of the connecting piece 40 do not have any overhangs or inclined surfaces. The tilter input shaft 22 has a first forked protruding piece 22a protruding in the axial direction at a lower end of the tilter input shaft 22 opposed to each other.
And 22b are formed. First forked protruding piece 22a
And 22b have a first pin receiving hole 50 whose diameter in the radial direction increases conically in a direction toward which the coupling pins 42 and 46 of the coupling piece 40 can be rotatably fitted.
And 52 are respectively formed. Thereby, when the rotation operation rod 24 is rotated, the universal joint 2
Even if the first forked protruding pieces 22a and 22b of the tilter input shaft 22 are bent by the downward load applied to the tilting shaft 8, the coupling pins 42 and 46 fitted in the first pin receiving holes 50 and 52 retain the first pins. Since the first pin receiving holes 50 and 52 are hooked on the conical surfaces of the receiving holes 50 and 52, they do not fall out of the first pin receiving holes 50 and 52. At the upper end of the rotary operation rod 24, a hollow connecting member 54 having second forked protruding pieces 54a and 54b protruding in the axial direction at positions facing each other is attached. The second forked protruding pieces 54a and 54b are provided with second pin receiving holes 56 and 58 into which the connecting pins 44 and 48 of the connecting piece 40 can be rotatably fitted, respectively. The assembly of the universal joint 28
The coupling pins 44 and 48 of the connecting piece 40 are fitted into the second pin receiving holes 56 and 58 of the rotary operation rod 24, respectively, and the coupling pins 42 and 46 are fitted into the first pin receiving holes 50 and 52 of the tilter input shaft 22, respectively. This is done by: When the connecting pins 42 and 46 of the connecting piece 40 are fitted into the first pin receiving holes 50 and 52 of the tilter input shaft 22, the connecting pins 42 and 46 have inclined surfaces 42b and 46b.
Is formed, it is easy to fit into the first pin receiving holes 50 and 52.

[0008]

According to the present invention, an extension projecting in the axial direction of the connecting piece is formed at the head of the connecting pin of the connecting piece connected to the tilter input shaft, and the first and second portions of the tilter input shaft are formed. Also, first pin receiving holes are formed in the protruding piece so that the radial dimension increases in a conical shape toward the outer diameter portion, and a coupling pin having a projecting portion on the head is fitted into the first pin receiving hole. Thus, the connecting piece is connected to the tilter input shaft. Accordingly, even when the first bifurcated protruding piece of the tilter input shaft bends due to a downward load applied to the universal joint when the rotary operation rod is rotated, the projecting portion of the coupling pin has the first protrusion.
Since the pin is caught on the conical surface of the pin receiving hole, the pin does not fall out of the first pin receiving hole. Therefore, it is possible to prevent the rotation operation rod from coming off the tilter input shaft. Further, even if a washer or the like is not attached to the tip of the coupling pin, the coupling pin does not come out of the first pin receiving hole, so that assembly is easy and workability can be improved. In addition, by forming an inclined surface on the head of the coupling pin on which the overhang is formed on the side opposite to the overhang, it is easier to fit the coupling pin into the first pin receiving hole. Properties can be further improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a blind embodying the present invention.

FIG. 2 is an exploded perspective view of a universal joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Slat 12 Head box 14 Bottom rail 16 Ladder code 18 Elevating cord 22 Tilter input shaft 22a, 22b First forked protruding piece 24 Rotating operation rod 28 Universal joint 40 Connecting piece 42, 44, 46, 48 Connecting pin 42a, 46a Overhang portions 54a, 54b Second forked protruding pieces 56, 58 Second pin receiving holes

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E06B 9/306 E06B 9/307 F16D 3/40

Claims (2)

(57) [Claims] 1. A head box (12), a number of slats (10) supported in alignment by a ladder cord (16), and a bottom rail (14) arranged at the lower end of the row of slats (10). A hollow tilter input shaft (22), which extends downward from one end of the head box (12) and whose inclination can be varied by rotation of the head box (12); a tilter input shaft (22) and a universal joint (2);
8) a hollow rotary operating rod (24) connected at one end to the bottom rail (14) and the other end inserted through the row of slats (10) to form a head box (1).
A lifting / lowering cord (18) which is introduced into 2), is inserted through the tilter input shaft (22) and the rotary operation rod (24), and is led out from the lower end of the rotary operation rod (24). The joint (28) is provided at one end of the tilter input shaft (22) so as to protrude in the axial direction at a position facing each other, and has a first forked shape in which first pin receiving holes (50, 52) are formed respectively. A projecting piece (22a, 22b), and a second pin receiving hole (56, 58), which is provided at one end of the rotary operation rod (24) so as to protrude in the axial direction at a position facing each other and has a second pin receiving hole (56, 58) formed therein. Forked protruding pieces (54a, 54b) and connecting pins (42, 46, 44, 48) formed thereon
Are the first and second pin receiving holes (50, 52, 56, 58)
To the tilter input shaft (2
The hollow connection piece (4) that can rotate the rotation operation rod (24) integrally with the rotation operation rod (24) and can change the connection angle.
0) and the blind operating device comprising: the connecting piece (4) connected to the tilter input shaft (22).
The coupling pins (42, 46) of (0) have projecting portions (42a, 42a,
46a) are formed respectively, and the first pin receiving hole (5) of the tilter input shaft (22) is formed.
0, 52) are each formed so that the radial dimension increases conically toward the outer diameter portion. 2. The connecting pins (42, 46) of the connecting piece (40) connected to the tilter input shaft (22) are connected to the projecting portions (42a, 46a) of these heads. The blind operating device according to claim 1, wherein an inclined surface (42b, 46b) that is inclined in an axial direction of the coupling pin (42, 46) toward the distal end is formed on the opposite side.