JPS58210295A - Rising speed control apparatus of roll blind - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling the screen winding speed of a roll blind, which winds up a drawn-out screen by the force of a spring built into a roll pipe, using an eddy electric wire.

An initial torque is applied to the spring that winds up the screen of a roll blind, and when the screen is pulled out, a tightening torque corresponding to the length of the screen that is pulled out is added to that initial torque. In order to ensure that the screen is wound up even when the screen is pulled out a little, the initial torque cannot be made too small.Therefore, when a long screen is pulled out to its limit, the spring winding torque is quite high. The resulting rise in tip-lean speed and impact were extremely large, causing wear and tear on the roll blind. To prevent this, deceleration devices that utilize fluid or friction have been used in the past, but fluid-based devices are expensive and relatively inexpensive friction-based devices tend to wear out easily.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device for controlling the screen winding speed of a roller blind, which has a simple structure, has no parts that wear out, and can be manufactured at a relatively low cost.

In order to achieve the above object, the device of the present invention incorporates a planetary gear mechanism in the roll pipe of the roll blind so that the sun float rotates together with the roll pipe when the screen is lowered, and rotates in the opposite direction to the roll pipe when the screen is rolled up. A magnet is fixed to the shaft of the sun float, and an electric conductor provided integrally with the roll pipe is brought close to the magnet, and the rotational speed l of the roll pipe is controlled by the eddy current generated when the screen is rolled down. This is a characteristic feature.

The apparatus of the present invention will be explained based on embodiments shown in the drawings.

As shown in FIGS. 1 and 2, a core wire 2 is extended 17L along the axis of the roll pipe 1 from a stator (not shown), and a spring 3 is fitted to the core.

One end of the spring 3 is connected to the core wire 2, and the other end is connected to a rotator integrated with a roll pipe (not shown).

A brake drum 4 is fixed to the end of the mandrel 2 via a pin 5, and a brake spring 6 is fitted to the drum.The protruding portions at both ends of the brake spring 6 are inserted into the slots iL of the clutch sleeve 7. The clutch sleeve 7 freely rotates in the direction of lowering the screen 15, but even if it tries to rotate once in the direction of lowering the screen 15, it rotates because the brake spring 6 is tightened to the brake drum 4. I can't do it.

A revolution shaft 8 is fixed to the clutch sleeve 7 with a female screw 9, and a revolution plate 10 is fixed to the revolution shaft.

A plurality of planetary gears 12 are connected to the revolution plate lO via the rotation axis 11.
be installed so that it can rotate freely. The planetary gear 12 is connected to the inner gear body 13
Then, the inner circumferential groove 23 of the inner circumferential gear body is fitted into the inner circumferential protrusion 25 of the roll pipe 1, and both are rotated together. Hollow disc @ on one side of the internal gear body 13! 24 is provided, and a lid 14 is attached to the opposite side. The planetary gear 12 is meshed with the sun gear 16, and the shaft portion 17 of the sun gear is connected to the circular wall 2.
Make it stick out from 4. A square shaft portion 18 is attached to the protruding shaft portion 17.
A disk magnet 20 having a square hole 19 is attached to the square shaft portion.The disk magnet 20 is fastened to the square shaft portion 18 with a washer 26 and a nib 21, and a disk wall facing the disk magnet is attached. Attach the hollow aluminum circle Jlii22 to 24 with the screw I.

When the screen is pulled out and the roll pile l is rotated, a torque corresponding to the screen pull-out length is applied to the spring 3.
is accumulated in At this time, since the clutch sleeve 7 rotates integrally with the roll pipe l, the sun gear 16 also rotates integrally with the roll pipe l.

Therefore, since there is no relative movement between the aluminum disk 22 and the disk magnet 20, no eddy current is generated in the aluminum disk 22 that acts as a rotational brake.

When the pulled out screen is released and the torque accumulated in the spring 3 is released, the spring 3 attempts to rotate the roll pipe 1 at high speed in the direction of winding up the screen. At this time, the craft sleeve 7 is prevented from rotating in the direction of the screen aLlf by the brake spring 6 and remains stationary, so the sun gear 16 is rotated in the direction opposite to the roll pipe l by the intimation foot Ik wheel 12. rotates at a rotational speed of Since a difference in rotational speed of three to four times occurs between the aluminum disk 22 and the disk magnet 2o across I, eddy currents are generated in the aluminum disk 22 that try to reduce the difference between the two. do. As a result, the rotational speed of the loaf 1 vibrator l is controlled by the eddy current 1k and decelerates, so the screen winding I
The winding speed is not so high, and damage to the roll blind due to the high speed and # lock when winding up the screen is prevented.

As shown in FIGS. 3 and 4, the conductor that generates the eddy current may be provided on the inner peripheral surface of the roll pipe.Similar to the embodiment described above, the shaft portion 17 of the sun gear 18 is connected to the inner peripheral gear body 13. A corner portion 18 is provided on the shaft portion. Fit the square hole 31 in the center of the square column magnet 3o into the corner 18.

The magnet 3o is fastened to the shaft portion 17 using a screwdriver 2+ and a washer 28. An aluminum ring 32 is fitted onto the inner peripheral surface of the roll pipe l around the prismatic magnet 30. The inner circumferential protrusion of the roll pipe l is fitted into the outer circumferential groove of the aluminum ring 32, and both are rotated together. As in the previous embodiment, when lowering the screen, the relative 11 (no movement, roll pipe l) is placed between the magnet 30 and the aluminum ring 32.
Vortex '+li that brakes the rotation of: i& is not generated. However, when the screen cracks, 30 magnets and 1 ff of aluminum are used.
32 rotate in opposite directions.

Since the roller blind does not rotate very fast, wear and tear caused by the roller blind's high speed and damage caused by hair can be prevented.

As described in 1, the device of the present invention that uses eddy current to control the L rising speed of the screen has excellent durability because it does not use eddy current, and has a simple structure, so it can be manufactured at a relatively low cost. can.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part of a roll blind equipped with a device according to one embodiment of the present invention, Fig. 2 is an exploded perspective view of the device shown in Fig. 1, and Fig. 3 is a sectional view of a roll blind equipped with a device according to an embodiment of the present invention. The corresponding figure, FIG. 4, is a sectional view taken along line IV-IV in FIG. 3. 1: Roll pipe, 2: Mandrel 3 Spring 7
: Clutch sleeve (brake rotation axis) 8: Revolution axis +2: MJ4 gear 13; Inner gear body 16: Sun gear 17; Shaft 20: Circular magnet 22 Ni-aluminum disc (
Conductor) 30: fit '4 + borostone 32 aluminum boron Applicant Tosoichi Co., Ltd.

Claims (1)

[Claims] l) A spring is wound around a fixedly supported core rod, and the spring is inserted into a roll pipe, one end of the spring is connected to the roll pipe, the other end is connected to the core wire, and the other end of the spring is connected to the core wire, and the spring is inserted into the roll pipe. In a roll blind in which the lowered screen is raised @L by the torque of the spring, a one-sided brake is provided on the core wire that does not brake the rotation of the screen in the lowering direction but brakes the rotation in the winding direction, and the rotation axis of the one-sided brake is provided with The revolution shafts of the planetary gears are connected, and an internal gear body that engages with the planetary gears is integrally attached to the roll pipe. A rising speed control device for a roll blind or the like, characterized in that a magnet is fixed to the shaft of a sun gear that engages with the planetary gear, and a conductor provided integrally with the roll pipe is brought close to the magnet. 2) A rising speed control device for a door blind or the like as set forth in claim 1, characterized in that a disc-shaped conductor is provided on the wall surface of the internal gear body. 3) The rising speed IW control device for a roll blind or the like as set forth in claim 1, characterized in that a II-shaped conductor is provided on the inner peripheral surface of the roll pipe.