JPH0436395Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a slat angle adjustment device for adjusting the angle of the slats of a blind.

(Prior Art) Conventionally, a slat angle adjustment device has been proposed in which the angle of the slat is adjusted by rotating an angle adjustment shaft in a headbox by rotating an operating rod hanging down from one side of the headbox. As shown in the figure, a worm mechanism 3 is interposed between the operating rod 1 and the angle adjusting shaft 2 to transmit the rotational force of the operating rod 1 to the angle adjusting shaft 2.

(Problems to be solved by the invention) In recent years, there has been a trend for blinds to become thinner by reducing the width of the slats, and the head boxes of such blinds have also been made smaller to match the slats. However, the above-mentioned slat angle adjusting device does not have a head box 4 as shown in FIG.
A worm wheel 5 is fitted onto the angle adjustment shaft 2 located approximately in the center of the worm wheel 5, and a worm 6 is engaged with the side of the worm wheel 5. Therefore, when the head box 4 is downsized, such a worm mechanism 3 in the head box 4 became difficult. Therefore, the object of this invention is to provide a gear mechanism for a slat angle adjusting device that can be easily accommodated in a downsized head box 4 in place of the worm mechanism 3 as described above.

Structure of the invention (means for solving the problem) In order to solve the above problem, this invention rotates the angle adjustment shaft inside the headbox by operating an operating rod hanging from one side of the headbox. In a blind that adjusts the angle of a slat using a head box, a first gear shaft is located diagonally in the head box, and a second gear shaft is connected on the same axis in the extending direction of the angle adjustment shaft. A gear mechanism consisting of two bevel gears housed in a case inside the head box is connected, and the operating rod suspended from the first gear shaft and the angle adjustment shaft are operatively integrated, and the second gear The shaft is biased by a coil spring serving as a bullet, and the bevel gear attached to the second gear shaft of the gear mechanism is pressed against the inner surface of the case to apply frictional force.

(Function) When the operating rod 16 is rotationally driven by the above means, the first gear shaft 19 located diagonally within the head box 12 and the second gear shaft meshing with the first gear shaft 19 by a bevel gear are rotated. The angle adjustment shaft 32 is rotated via the shaft 28 to adjust the angle of the slat, and the adjusted angle is reliably maintained by the frictional force of the spring.

(Embodiment) An embodiment embodying this invention will be described below with reference to the drawings. As shown in FIG. Slut 1
4 is suspended and supported, and a bottom rail 15 is suspended and supported from the lowest stage of the ladder cord 13.
The upper end of the ladder cord 13 is the head box 1.
An operating rod 16 is supported by an angle adjustment shaft (to be described later) within the head box 12 and is suspended from one side of the head box 12.
By rotating the slats 14, the angles of each slat 14 can be adjusted in the same phase via the ladder cord 13.

A lifting cord 17 is passed through each slat 14 near the support portion of the ladder cord 13,
One end of the lifting cord 17 is connected to the bottom rail 15, and the other end is connected to the head box 12.
After being guided in one direction, it is suspended near the operating rod 16 at one end of the head box 12. Each slat 14 can be raised or lowered by operating the lift cord 17 to raise or lower the bottom rail 15.

A hook 18 is formed at the upper end of the operating rod 16, and the hook 18 is suspended and supported by a first gear shaft 19 of a gear mechanism, which will be described later, which is built into the head box 12. As shown in FIG. 3, the gear mechanism 20 has a case 21 molded from synthetic resin.
A fitting protrusion 22 is formed on the front side surface thereof and protrudes forward. Case 21 of Headbox 12
A mounting hole 23 is formed in the mounting portion from the lower side to the bottom surface, and when the fitting protrusion 22 of the case 21 is fitted into the mounting hole 23 from inside the head box 12, the case 21 is inserted into the head box 12 internally. has been done.

The first gear shaft 19 projects obliquely downward from a fitting projection 22 projecting outside the head box 12, and the hook 18 of the operating rod 16 is suspended and supported in a connecting hole 24 provided at the tip end of the first gear shaft 19. ing. Head boxes 12 on both sides and top of the fitting protrusion 22
A mounting groove 25 is formed along the outer surface, and a cap 26, which is also made of synthetic resin and molded in the same color as the head box 12 and slat 14, is fitted into the mounting groove 25. As shown in FIG. 5, the cap 26 is formed into a hollow shape and has a protrusion 27 formed on the back surface that engages with the mounting groove 25. Since the fitting protrusion 22 is prevented from being retracted into the head box 12 by the cap 26, the case 21 is prevented from moving in the same direction.

A second gear shaft 28 is rotatably supported in the case 21 along the longitudinal direction of the head box 12 and on the same axis as the angle adjustment shaft 32 in the extending direction.
Bevel gears 29 and 30 are integrally formed at the tips of the gear shaft 8 and the first gear shaft 19, respectively, and mesh with each other. Both bevel gears 29 and 30 are located along the diagonal line of the head box 12, as shown in FIG. A hexagonal hole 31 is passed through the axial center of the second gear shaft 28, and an angle adjustment shaft 32 is fitted into the hexagonal hole 31. Therefore, the operating rod 16
When rotated, the first gear shaft 19 and the bevel gear 2
9, 30, the angle adjustment shaft 32 is rotated via the second gear shaft 28.

The second gear shaft 28 has its base end projected outside the case 21 , a support plate 33 is fitted to the base end, and a coil spring 34 is disposed between the support plate 33 and the case 21 . There is. The second gear shaft 28 is always urged outward from the case 21 via the support plate 33 by the urging force of the coil spring 34 with the case 21 as a fulcrum, and the bevel gear 30 is pressed against the inner surface of the case 21. It is becoming more and more common. Therefore, the torque transmitted from the first gear shaft 19 causes the second gear shaft 28 to move its bevel gear 30 toward the case 2.
1. It rotates while rubbing against the inner surface.

Next, the operation of the slat angle adjusting device as described above will be explained.

Now, in order to adjust the angle of the slat 14 of the blind 11, when the operating rod 16 is rotated in one direction using an operating force that resists the friction between the bevel gear 30 and the case 21, the second gear shaft 28
is rotated, and the angle adjustment shaft 32 is rotated. Then, each slat 14 is tilted in the same phase via the ladder cord 13. When you let go of the operating rod 16 after adjusting each slat 14 to a desired angle, a slight rotational force acts on the angle adjustment shaft 32 via the ladder cord 13 due to the weight of the tilted slats 14. The rotation of the angle adjustment shaft 32 by the bevel gear 30 of the second gear shaft 28 and the case 21
Each slat 14 is stably held at a desired angle because of the frictional force with the inner surface.

As described above, the gear mechanism 20 of the slat angle adjustment device of this embodiment has a first gear shaft 19 that is rotationally driven by the operating force 16 and a second gear shaft 28 that is connected to the angle adjustment shaft 32. 29 and 30, both bevel gears 2 are connected as shown in Fig. 4.
9 and 30 can be positioned diagonally of the head box 12.
Such a gear mechanism 20 can be easily accommodated in the head box 12, which has been made smaller by effectively utilizing the space inside.

On the other hand, in the gear mechanism 20, the fitting protrusion 22 of the case 21 is inserted into the mounting hole 22 from the inside of the head box 12.
Since the case 21 is fitted in the mounting hole 23, the movement of the case 21 toward the outside of the head box 12 and in the left-right direction is restricted by the mounting hole 23. Further, movement of the case 21 inward of the head box 12 is restricted by a cap 26 fitted into the fitting protrusion 22. Therefore, the case 21 is immovably fixed to the head box 12 and will not be moved by the rotation of the operating rod 16. In addition, head box 1
The cap 26 that fits into the fitting protrusion 22 protruding from the head box 12 extends over the head box 12 and is molded in the same color as the slat 14.
2 can be covered to improve the aesthetic appearance of this blind 11.

In the above embodiment, the first and second gear shafts 19 and 28 were engaged with the bevel gears 29 and 30, but
It is also possible to use a gear, such as a screw gear, in which the first gear shaft 19 can be positioned diagonally to the headbox 12 and meshed with the second gear shaft 28. Further, in the embodiment described above, the fitting protrusion 22 of the gear mechanism 20 is covered with the cap 26, but it is also easy to cover the outlet from which the lifting cord 17 is drawn out from the head box 12 with such a cap.

Effects of the device As detailed above, this device not only makes effective use of the space inside the head box 12 and can be easily stored in the downsized head box 12, but also securely maintains the angle adjustment position. This provides an excellent effect of providing the gear mechanism 20 of the slat angle adjusting device.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a gear mechanism embodying this invention attached to a head box, Fig. 2 is a front sectional view thereof, Fig. 3 is a side view thereof,
Figure 4 is a side sectional view, Figure 5 is a perspective view of the cap,
Figure 6 is a front view of the blind related to this invention.
FIG. 7 is a schematic diagram showing a conventional example of this invention. Operation rod 16, first gear shaft 19, gear mechanism 2
0, case 21, second gear shaft 28, bevel gear 2
9, 30, angle adjustment shaft 32, coil spring 3
4.

Claims (1)

[Scope of utility model registration request] In a blind that adjusts the angle of the slat by rotating an angle adjustment shaft in the headbox by operating an operating rod hanging from one side of the headbox, a first gear located in the diagonal direction of the headbox 12 in the headbox 12 is used. Axis 19
and a second gear shaft 28 which is connected in series on the same axis in the direction of extension of the angle adjustment shaft 32, are connected to the head box 1.
The operating rod 16 suspended from the first gear shaft 19 and the angle adjustment shaft 32 are connected by a gear mechanism 20 consisting of two bevel gears 29 and 30 housed in a case 21 housed in the case 2, and are operationally integrated. At the same time, the second gear shaft 28 is biased by a coil spring 34 as a bullet, and the second gear mechanism 2 of the gear mechanism 20 is
8. A slat angle adjusting device for a blind, characterized in that a bevel gear 30 attached to a casing 21 is pressed against the inner surface of a case 21 to apply frictional force.