JPH044476Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a lift cord winding device for a blind that is capable of winding and storing the lift cord of a blind inside a bottom rail.

<Prior art and its problems> For example, as shown in Figure 2A, the lower ends of two lift cords are connected to the bottom rail, and the other end is connected to the upper part of the blind. The lift cords are passed through the box-shaped case arranged in the box-shaped case, and are brought out from the side of the box-shaped case, and these two lift cords are combined into one, and the other end of this lift cord is connected to the end of the bottom rail. It is connected to the section. By pulling or returning the lift cord, the bottom rail can be raised or lowered, and the slats can be expanded or contracted. In addition, as shown in Figure 3A, the lower ends of the two lift cords are connected to the bottom rail, and the other ends are passed through the box-shaped case placed above the blind. Extrude from the side, and without connecting this end to the bottom rail, simply hang it in a position where the person operating it can reach it while standing on the floor of the room when the blind is unfolded. There were also things to keep.

By the way, both of the blinds shown in FIG. 2A and FIG. The drooping lower end hangs down to the position of the bottom rail when the blind is unfolded. And the longer the length of the blind in the vertical direction, the longer the lift cord or lift cord will be.

However, the existence of such a condition, especially when raising the slats of the blind, means that this lift cord, or only the lift cord of the blind, is hanging down along the window frame. In addition, it not only spoils the aesthetic appearance, but also
For example, when touched by a child, there was a problem in that the blinds could inadvertently expand (blinds are lowered).

In general, in order to operate a lift cord, the lift cord must be within reach when the operator is in a normal state, that is, standing on the floor of the room. Even if it is a conventionally used one,
Although designed to be the shortest length, these lift cords are forced to fit the blind in its longest unfolded position, so they are inevitably longer, and it is important to ensure that these cords do not sag. Since there was no device for this, the above-mentioned problem did not exist.

<Means for solving the problem> Therefore, in order to solve the above-mentioned problem, the lift cord winding device for a blind according to the present invention has the bottom rail of the blind formed hollow, and the inside of this bottom rail or this A gear that is always urged to rotate in one direction by a spring is arranged vertically inside a hollow body connected to the bottom rail, and the end of the lift cord of the blind is attached to a shaft fixed to this gear. fix the part,
A rotating piece that can be freely engaged and detached from the tooth surface of the gear inside the bottom rail is arranged so that the tip of the rotating piece is biased by a spring so that it engages with the tooth surface of the gear during normal times. At the same time, when one lift cord of the blind is connected to the other end of this rotating piece and the lift cord is pulled upward to raise the bottom rail, the rotating piece is moved by the traction force generated by the lift cord generated at this time. is rotated to release the engagement with the gear, and the gear and its shaft are rotated, so that the lift cord is wound around the shaft of the gear and stored.

<Embodiment> Next, an embodiment of the lift cord winding device for a blind according to this invention will be described based on the drawings. 1 is a hollow bottom rail, and 2 is a bottom rail inside the bottom rail 1. This is an axis arranged vertically. 3 is a gear fixed to the shaft 2, and a spring 4 is disposed on the shaft 2, and the gear 3 is attached to the shaft 2 together with the spring 4.
is biased to rotate in one direction. However, this urging is due to the rotational force of the spring 4, and it is possible to reverse the rotation against the elasticity of the spring 4. Reference numeral 5 denotes a rotating piece that is detachably disposed on the tooth surface of the gear 3, and this rotating piece 5
is rotatably pivoted by a pin 6 at approximately the center thereof, and the other end is tilted via a spring 7 so that the tip of the rotary piece 5 engages with the tooth surface of the gear 3 during normal operation. It is energized. 8 is a lift cord connected to the end of the rotating piece 5, and the other lift cord 8' is directly connected to the bottom rail 1.
Reference numeral 9 denotes a lift cord in which the lift cords 8 and 8' are connected together into one lift cord, and 10 denotes a stopper tightly disposed on a part of this lift cord 9. This lift cord 9 is the bottom rail 1
The stopper 10 is fixed to the shaft 2 of the gear 3 through an elongated hole 12 drilled in the bottom rail cap 11 at the side end of the stopper 10 . long hole 12
must be larger than the diameter of

〈Operation〉 However, the entire blind is now spread out on the board. In other words, it is assumed that the bottom rail 1 is in a downwardly descending state. From this stage, the bottom rail 1 is raised, but in this case, the lift cord 9 is first pulled, and the lift cords 8 and 8' connected to the lift cord 9 are then pulled upward. However, especially due to the upward traction force of the lift cord 8, the rotating piece 5 rotates against the spring 7, and its tip separates from the tooth surface of the gear 3. Then, the shaft 2 of the gear 3 rotates in one direction together with the gear 3 by the action of the spring 4, and by continuing this rotation, the lift cord 9 is gradually pulled down from the long hole 12 of the bottom rail cap 11 to the bottom. It is pulled inside the rail 1 and wound around the shaft 2 of the gear 3. Eventually, the stopper 10 disposed on a part of the lift cord 9 reaches the elongated hole 12 of the bottom rail cap 11, and the action of the stopper 10 prevents the lift cord 9 from moving further inside the bottom rail 1. However, by further pulling down the lift cord 9, the bottom rail 1 is raised further. When the bottom rail 1 reaches the desired height, the lift cord 9 stops being pulled down, and the bottom rail 1 stops at that height (the stopping mechanism of the lift cords 8, 8' is the same as the conventional No change). In this state, the lift cord 9 may have a portion that hangs downward compared to the position of the bottom rail 1. This is because the lift cord 9 must be within reach of the operator, so it is natural that it must be located below the top edge of the blind.
The hanging length becomes very short. In this way, the hanging length of the lift cord 9 is ultimately determined by the position of the stopper 10, so in order to shorten the hanging length, the position of the stopper 10 should be set closer to the lift cord 9. All you have to do is set it upwards.

Also, when lowering the bottom rail 1,
By once pulling the lift cord 9 downward, the rotating piece 5 is slightly rotated, and the engagement of the rotating piece 5 with the gear 3 is released. The lift cord 9 is then extracted from the contents of the bottom rail 1. In this case, when the lift cord 9 is pulled out from the bottom rail 1, the gear 3 and the shaft 2 rotate in the opposite direction against the spring 4, and the bottom rail 1 gradually descends.

<Effects of the invention> As described above, according to the lift cord winding device for a blind according to this invention, the gear and the shaft rotated by the spring are arranged inside the bottom rail, so that the lift cord can be moved around the bottom rail. As the lift rises, it is wrapped around this shaft and stored without hanging excessively on the outside, and the rotating piece is configured to engage the tooth surface of the gear, so that once it is wrapped around the shaft, the lift The cord does not accidentally come out outside, and even when the bottom rail is raised to the top, the length of the lift cord hanging outside can be kept to the minimum necessary, which is a great effect.

[Brief explanation of drawings]

The drawing shows an embodiment of the lift cord winding device for a blind according to this invention.
Figure 1 is a partially omitted sectional view, Figures 2A and 3A are front views showing the conventional example in its unfolded state, and Figures 2B and 3B are the conventional example with the bottom rail raised. FIG. 1...bottom rail, 2...shaft, 3...gear,
4, 7... Spring, 5... Rotating piece, 6... Pin, 8, 8', 9... Lift cord, 10... Stopper, 11... Bottom rail cap, 12
...Long hole.

Claims (1)

[Scope of utility model registration request] A gear formed on the bottom rail of the blind and vertically disposed inside the bottom rail or inside a hollow body connected to the bottom rail, which is always biased by a spring to rotate in one direction, The end of the lift cord of the blind is fixed to the shaft fixed to this gear, and a rotating piece that can be freely engaged and detached from the tooth surface of the gear inside the bottom rail is attached. A lift cord for a blind, characterized in that the lift cord is disposed so as to be biased by a spring so as to engage with a tooth surface, and the vertical movement cord of one of the blinds is connected to the other end of the rotating piece. Winding device.