JP3306853B2 - Venetian blind gearbox - Google Patents

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 via a hollow operating rod, and more particularly, to transmitting rotation between a tilting shaft and an operating rod. The present invention relates to improvement of a gear box of a gear.

[0002]

2. Description of the Related Art In a head box, a pinion is fixed to a tilting shaft, an internal gear is engaged with the pinion, an outer periphery of the internal gear is fitted into a gear box, and a hollow bevel gear is similarly mounted on the gear box. Attach, 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 gearbox and the headbox, and connect the hollow operating rod to the lower end of the hollow universal joint. A venetian blind in which one end of a lifting 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. Sho 62-37915. The gear box containing the internal gear of the blind and the hollow bevel gear is fixed at a predetermined position on the head box, but the gear box of the left-hand blind and the right-hand blind has a tilting shaft whose protruding relation position of the hollow bevel gear is the tilting shaft. Since it is symmetrical about the vertical plane including the heart, the shape is different and each one has to be prepared separately.

[0003]

In some cases, it is desired to change left and right in the direction of blind operation depending on the surrounding conditions and the user's preference. However, conventional blinds cannot cope with this. The parts other than the gear box of the internal gear and the hollow bevel gear are common to the right and left, or it is extremely easy to form them into a shape for both the left and the right. Therefore, it has been strongly demanded that the gear box of the internal gear and the hollow bevel gear be also common to the right and left. The present invention is intended to meet this demand, and the object thereof is to provide an internal gear and a hollow which can be attached to a left-handed blind or a right-handed blind without detaching a hollow operation rod. An object of the present invention is to provide a bevel gear box.

[0004]

In order to achieve the above object, the present invention employs a head box, a tilt shaft passing through the head box, a gear ring for transmitting rotation to the tilt shaft, A gear box fixed to a head box to house 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 having a hollow operation rod connected to a hollow universal joint and a lifting / lowering cord passing from the inside of a head box through a hollow input shaft end and a hollow universal joint to a hollow operation rod, a gear box is tilted in a head box. When the gear box can be swung around the axis and the gear box is fixed to the head box at one swing position, a hollow bevel 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]

[Function] The gear box can be swung back and forth around the tilt axis without attaching and 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 be the head. The operation is left-handed (or right-handed) by protruding from the lower front corner of the box. When the head is swung backward and fixed to the head box, the end of the hollow bevel gear shaft protrudes from the rear lower corner of the headbox and the operation is right-handed (or Left hand). The gear box can be fixed directly to the head box by screws or the like, or can be fixed to the head box via a spacer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outer garment of the present invention will be described based on an embodiment 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. The internal gear 14 that meshes with the pinion 12
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 meshes with the bevel gear 16 in the gear box 14 protrudes from the opening 13 of the head box 10, and further the shaft end of the hollow bevel gear 17 protrudes therefrom. 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. The lifting cord 20 for hanging the blinds is a hollow bevel gear inside the headbox 10.
Then, it enters the hollow shaft portion of 17, and then passes from the hollow universal joint 18 to the hollow operating rod 19, and is pulled out from the grip 21 provided at the lower end thereof.

A tilt drum (not shown) is attached to the tilt shaft 11, and the front and rear upper ends of the ladder cord 22 are hung on the tilt drum. The slat 23 supports the ladder code 21. Operation stick 19
Is transmitted to the tilt 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 slat 23 via the ladder cord 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 of the grip 21 is pulled, the blind rises.

In the blind shown in FIG. 1, the gear box 14 is in one swing position, and the axis of the hollow bevel gear 17 is inclined forward from the tilt shaft 11 with respect to a vertical plane. To reverse the operation of the blind, as shown in FIG. 3, the gear box 15 is turned to the other swing position and fixed, and the axis of the hollow bevel gear 17 is inclined backward with respect to the vertical plane. .
Then, when the head box 10 is reversed, the operation 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 via a spacer 30, the set screw 29 becomes only the bottom of the head box. And 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 an internal gear 14 integral with a bevel gear 16 is installed and a hollow bevel gear chamber 25 in which a hollow bevel gear 17 is installed. The outer wall is cylindrical. A pinion is attached to a bearing 27 protruding from the pinion side end surface of the inner gear chamber outer wall 26.
Bearing 12 shaft ends. Bearing 27 is composed of tilting shaft 11 and internal gear
It has an oval cross section containing 24 axes. Gear box
The outer wall 28 of the 15 hollow bevel gear interior room 25 is the outer wall of the inscribed gear room
It deviates in the axial direction 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 tilt shaft 11 to the outer wall of the inscribed gear chamber is smaller than the height of the tilt shaft 11 in the head box 10. Therefore, the gear box 15 can be swung freely within a range of approximately 90 degrees around the tilt shaft 11.

The spacer 30 shown in FIG. 4 is made of synthetic resin, and is provided between a long long bottom 31 extending along one lower corner of the head box 10 and exceeding the opening 13 and a short short bottom 32 extending along the other lower corner. The gear box fixing portion 33 has an oval shaft hole 34 into which the bearing 27 of the gear box 15 is fitted. The spacer 30 and the gear box 15 are fixed by passing a set screw 35 below the shaft hole 34. Long bottom 31
The arcuate surface provided on the upper surface of the short bottom portion 32 fits perfectly with the outer peripheral surface of the inner wall 26 of the gear box 15. Spacer
When the swinging position of the gear box 15 is changed from one side to the other side by reversing 30 as shown by the arrow B, the operating convenience of the blind can be easily changed from left to right or from right to left. The present invention is not limited to the gear ring shown in the embodiment and the gear box accommodating the same.
For example, the bevel gear is omitted by omitting the pinion 12 and the inscribed gear 24.
It is also possible to attach the coaxial 16 to the tilt shaft 11.

[0011]

As described above, the gear box in which the gear ring of the present invention is mounted has a structure common to the left and right hands, unlike the conventional gear box exclusively used for the left or right hand, and the hollow operation rod is attached and detached. Since it is possible to swing back and forth around the tilting axis without using a single hollow operation rod, the operation of the venetian blind that performs tilting operation and lifting operation of the slat from left to right or from right to left, or On the contrary, there is an excellent effect that it can be easily changed.

[Brief description of the drawings]

FIG. 1 is a side view of a blind provided with a gear box according to one embodiment of the present invention;

FIG. 2 is a sectional view taken along the line II-II of FIG. 1,

FIG. 3 is a view showing a state in which the operation of FIG. 1 is reversed;

FIG. 4 is an exploded perspective view showing a 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: Lifting cord, 21: Grip, 22: Ladder cord, 23: Slat , 24: inscribed gear chamber, 25: hollow bevel gear chamber, 26: inscribed gear chamber outer wall, 28: hollow bevel gear chamber outer wall, 30: spacer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-37286 (JP, A) JP-A-63-129096 (JP, U) JP-A-63-111600 (JP, U) JP-A-6-111600 U.S. Pat. No. 4,818,736 (US, A) (58) Field of investigation (Int. Cl. ⁷ , DB name) E06B 9/323

Claims (3)

(57) [Claims] 1. A head box (10), a tilt shaft (11) passing through the head box, a gear ring for transmitting rotation to the tilt shaft, and a gear box fixed to the head box to receive the gear ring. (15), a hollow input shaft end of the gear ring protruding from an opening (13) provided in the head box, a hollow universal joint (18) connected to the hollow input shaft end, and a hollow universal joint. In a venetian blind comprising: a hollow operating rod (19) to be connected; and a lifting cord (20) that passes through the hollow operating rod from inside the head box through the hollow input shaft end and the hollow universal joint. A box is formed so as to be at least partially rotatable back and forth about the tilt axis, and the gear box is rotated forward and fixed to the head box via a spacer (30) . Then, the hollow operation rod hangs down to the front side of the head box, and the gear box is turned backward, turned upside down, and fixed to the head box via the spacer (30). A venetian blind gear box that hangs down the back of the headbox. 2. A pinion (12) attached to a tilt shaft (11) so as to rotate integrally therewith, an internal gear (14) engaged with the pinion, and a bevel gear (16) formed integrally with the internal gear. ) And a hollow bevel gear (17) engaged with the bevel gear to form a gear ring, and a gear box (15)
An internal gear chamber (24) and a hollow bevel gear chamber (25), which respectively house the internal gear and the hollow bevel gear,
The outer surface (28) of the hollow bevel gear chamber can protrude from the opening in the gear box (15), and the outer wall (26) of the inscribed gear chamber can rotate the head in a front and rear rotation position around the tilt axis. The venetian blind gear box according to claim 1, wherein the gear box is formed so as to be fixable to the box. 3. The spacer (30) is provided on the head box (10).
Long bottom (31) along one lower corner and beyond opening (13)
And a short short bottom (32) along the lower corner of the other
Gear box fixing part (33).
The fixed part (33) fits inside the bearing part (27) of the gear box ( 15).
Oval shaft hole (34) for
3. The venetian blind gear box according to claim 1, wherein the pacer (30) and the gear box (15) are fixed .