JPH06200685A - Gear box of venetian blind - Google Patents

Abstract

PURPOSE:To change the manipulating mode of a blind without replacing of the parts and attaching or detaching of a suspended manipulating rod, in a venetian blind which can operate the inclining movement and the lifting movement by means of a hollow manipulating rod. CONSTITUTION:A hollow bevel gear 17 is connected to a hollow manipulating rod 19 and the revolution of the hollow manipulating rod is transmitted to a slant shaft 11 through the gearing including the hollow bevel gear 17. The gearing is contained in a gear box 15 which is formed to swing around the slant shaft 11. When the gear box 15 is fixed to a head box 10 at the almost furthermost limit position in one side of the swing motion, the shaft end of the hollow bevel gear 17 protrudes from one corner of the opening 13 of the head box 10. When it is fixed to the head box 10 at the almost furthermost limit position in the other side of the swing motion, the shaft end of the hollow bevel gear 17 protrudes from the other corner of the opening 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a venetian blind for raising and lowering and tilting a slat through a hollow operating rod. More specifically, it transmits rotation between a tilting shaft and an operating rod. It relates to the improvement of the gear box of the gear.

[0002]

2. Description of the Related Art In a headbox, a pinion is fixed to a tilting shaft, an internal gear is engaged with the pinion, the outer periphery of the internal gear is fitted to the gearbox, and a hollow bevel gear is also attached to the gearbox. Install it, engage the hollow bevel gear with the bevel gear integrated with the internal gear, connect the upper end of the hollow universal joint to the end of the hollow bevel gear protruding from the gear box and headbox, and connect the hollow operating rod to the lower end of the hollow universal joint. A venetian blind in which one end of an elevating cord is fixed to a head rail and the other end is passed from a hollow bevel gear to a hollow operating rod through a hollow universal joint is known from Japanese Utility Model Publication No. 62-37915. The gearbox that houses the blind internal gear and the hollow bevel gear is fixed in place on the headbox, but the left-hand blind and right-hand blind gearboxes have a hollow bevel gear whose protruding relationship is the axis of the tilting shaft. Since they were symmetric with respect to the vertical plane containing the heart, they had different shapes and had to prepare different ones.

[0003]

In some cases, it is desired to change the left and right directions of blind operation depending on the surrounding conditions and user's preference. However, the conventional blind cannot handle this. Parts other than the gearbox of the internal gear and the hollow bevel gear are common to the left and right hands, or it is extremely easy to make the shape for both the left and right hands. Therefore, it has been strongly demanded that the gearboxes of the internal gear and the hollow bevel gear be commonly used on the left and right. The present invention is intended to respond to this demand, and its object is to provide a hollow operation rod that can be directly attached to a left-handed blind or a right-handed blind without attaching or detaching an operating gear and a hollow. It is to provide a gear box for bevel gears.

[0004]

In order to achieve the above object, the means adopted by the present invention are a head box, a tilting shaft passing through the head box, a gear ring for transmitting rotation to the tilting shaft, and A gear box fixed to the head box to accommodate the gear ring, a hollow input shaft end of the gear ring protruding from an opening provided in the head box, and a hollow universal joint connected to the hollow input shaft end, In a Venetian blind equipped with a hollow operating rod connected to the hollow universal joint and an elevating cord passing from the inside of the headbox through the hollow input shaft end and the hollow universal joint to the hollow operating rod, the gearbox is tilted in the headbox. When the gearbox is fixed to the headbox at one of the swing positions, the hollow bevel can be used. Ya protrudes from one corner of the front and rear of the head box and fixed to the head box in the other swing position, the hollow bevel gear is to have so as to protrude from the front and rear of the other corners of the headbox.

[0005]

[Operation] Since the gear box can be swung back and forth around the tilting shaft without attaching or detaching the hollow operation rod, if the gear box is swung forward and fixed to the head box, the end of the hollow bevel gear shaft will move to the head. The operation is left-handed (or right-handed) by protruding from the lower front corner of the box, and when swinging backward and fixed to the headbox, the hollow bevel gear shaft end protrudes from the lower rear corner of the headbox and operation is right-handed (or Left handed). The gear box can be directly fixed to the head box with screws or the like, or can be fixed to the head box via a spacer.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The outer garment of the present invention will be described based on the embodiments shown in the drawings. As shown in FIGS. 1 and 2, a tilting shaft 11 having a hexagonal cross section passes through the inside of the head box 10 in the longitudinal direction,
The pinion 12 is attached to the tilt shaft 11 so as to rotate integrally. Replace the internal gear 14 that meshes with the pinion 12 with the gear box 15
And the bevel gear 16 is formed integrally with the internal gear. A part of the gear box 14 in which the hollow bevel gear 17 is engaged with the bevel gear 16 in the gear box 14 projects from the opening 13 of the head box 10, and the shaft end portion of the hollow bevel gear 17 further projects from there. The upper end of the hollow universal joint (18) is connected to the shaft end of the hollow bevel gear (17), and the hollow operating rod (19) is connected to the lower end thereof. The lifting cord 20 for suspending the blinds is a hollow bevel gear in the head box 10.
Enter the hollow shaft portion 17 and then pass through the hollow universal joint 18 to the hollow operating rod 19 and pull out from the grip 21 provided at the lower end thereof.

A tilting drum (not shown) is attached to the tilting shaft 11, and the front and rear upper ends of the ladder cord 22 are hung on the tilting drum. The slats 23 are supported by the ladder cord 21. Operating rod 19
Is transmitted to the tilting shaft 11 via the hollow universal joint 18, the hollow bevel gear 17, the bevel gear 16, the internal gear 15, and the pinion 12, and tilts the slats 23 via the ladder cords 22. When the grip 21 is loosened, the blind descends by its own weight, when the grip 21 is released, the blind stops, and when the lifting cord 20 pulled out from the grip 21 is pulled, the blind rises.

In the blind of FIG. 1, the gear box 14 is in one swinging position, and the axis of the hollow bevel gear 17 is tilted forward from the tilt shaft 11 with respect to the vertical plane. In order to reverse the operation convenience of this blind, as shown in FIG. 3, the gear box 15 is rotated and fixed to the other swing position, and the axis of the hollow bevel gear 17 is tilted rearward with respect to the vertical plane. .
Then, when the head box 10 is inverted, the operability is reversed. The gear box 15 may be directly fixed to the head box 10 with a set screw or the like. However, as shown in FIGS. 1 and 3, when the gear box 15 is fixed to the head box through the spacer 30, the set screw 29 is only on the bottom surface of the head box. Therefore, the front surface of the set screw can be prevented from being exposed.

As shown in FIG. 2, the gear box 15 comprises an internal gear chamber 24 in which the internal gear 14 integrated with the bevel gear 16 and a hollow bevel gear chamber 25 in which the hollow bevel gear 17 is embedded. The outer wall is cylindrical. The pinion is attached to the bearing portion 27 protruding from the end face of the inner wall of the internal gear chamber 26 on the pinion side.
12 Bearing the shaft end. The bearing portion 27 includes the tilting shaft 11 and the internal gear.
It has an oval cross section including 24 axes. Gear box
The outer wall 28 of the hollow bevel gear internal chamber 25 of 15 is the outer wall of the inscribed gear chamber
It is axially displaced from 26 and partially projects from an opening 13 extending from the front surface to the rear surface of the head box 10. The distance from the axis of the tilting shaft 11 to the outer wall of the inscribed gear chamber is smaller than the height of the tilting shaft 11 inside the head box 10. Therefore, the gear box 15 can be freely swung about the tilting shaft 11 within a range of about 90 degrees in the front-back direction.

The spacer 30 shown in FIG. 4 is made of a synthetic resin and is provided along one lower corner of the head box 10 with a long long bottom portion 31 extending beyond the opening 13 and a short short bottom portion 32 along the other lower corner thereof. The gear box fixing portion 33 has an oval shaft hole 34 into which the bearing portion 27 of the gear box 15 is fitted. A set screw 35 is passed under the shaft hole 34 to fix the spacer 30 and the gear box 15. Long bottom 31
The arcuate surface provided on the upper surface of the short bottom portion 32 fits exactly on the outer peripheral surface of the inscribed gear chamber outer wall 26 of the gear box 15. Spacer
When 30 is reversed as shown by arrow B and the swing position of the gear box 15 is changed from one to the other, the blind operation can be easily changed from left to right or right to left. The present invention is not limited to the gear ring and the gear box that houses the gear ring shown in the embodiments.
For example, omitting the pinion 12 and the internal gear 24, the bevel gear
It is also possible to attach 16 to the tilt axis 11 coaxially.

[0011]

As described above, the gear box incorporating the gear ring of the present invention has a structure common to left and right hands, and has a hollow operating rod attached and detached, unlike the conventional gear box for left hand or right hand use only. It is possible to swing back and forth around the tilt axis without doing so, so that the operation of the Venetian blind that tilts and raises and lowers the slat through one hollow operation rod is operated from left to right, or On the contrary, it has an excellent effect that it can be easily changed.

[Brief description of drawings]

FIG. 1 is a side view of a blind including a gear box according to an embodiment of the present invention,

2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a diagram showing a state in which the operation of FIG. 1 is reversed,

4 is an exploded perspective view showing the relationship between the gear box and the spacer of FIG. 1,

[Explanation of symbols]

10: Head box, 11: Tilt axis, 12: Pinion, 13:
Opening, 14: Internal gear, 15: Gear box, 16: Bevel gear, 17: Hollow bevel gear, 18 Hollow universal joint, 19: Hollow operating rod, 20: Lift code, 21: Grip, 22: Ladder code, 23: Slat , 24: internal gear chamber, 25: hollow bevel gear chamber, 26: internal gear chamber outer wall, 28: hollow bevel gear chamber outer wall, 30: spacer

Claims (3)

[Claims] 1. A head box (10), a tilting shaft (11) passing through the head box, a gear ring for transmitting rotation to the tilting shaft, and a gear box fixed to the head box and housing the gear ring. (15), the hollow input shaft end of the gear ring protruding from the opening (13) provided in the head box, the hollow universal joint (18) connected to the hollow input shaft end, and the hollow universal joint. The gear blind in a venetian blind including a hollow operating rod (19) to be connected, and an elevating cord (20) passing from the inside of the head box to the hollow operating rod through the hollow input shaft end and the hollow universal joint. When the box is formed so as to be rotatable at least partially back and forth around the tilt axis, and the gear box is rotated forward and fixed to the head box, the hollow operation is performed. Is hung on the front side of the head box, and when the gear box is rotated backward and fixed to the head box, the hollow operation rod hangs on the rear side of the head box. Chamblind gearbox. 2. A pinion (12) mounted so as to rotate integrally with a tilting shaft (11), an internal gear (14) engaging with the pinion, and a bevel gear (16) integrally formed with the internal gear. ) And a hollow bevel gear (17) engaging with the bevel gear, a gear ring is formed, and a gear box (15)
An internal gear chamber (24) and a hollow bevel gear chamber (25) that house the internal gear and the hollow bevel gear, respectively,
In the gear box (15), the outer wall (28) of the hollow bevel gear chamber can project from the opening, and the outer wall (26) of the inscribed gear chamber is at the front and rear rotation positions about the tilt axis. The gearbox for a Venetian blind according to claim 1, wherein the gearbox is formed so as to be fixed to the box. 3. The Venetian blind gearbox according to claim 1, wherein the gearbox (15) is fixed to the headbox (10) through a spacer (30).