JPS6030397Y2 - Bottom cord connection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connecting device for the bottom cord of a vertical blind.

In vertical blinds, in order to maintain the mutual spacing between the bottoms of the slats, the bottom frame of each slat must be connected with a cord, etc. Until now, the cords were rather firmly fixed, so There was a problem where the cord would break immediately if you stepped on it.

The purpose of this invention is to provide a bottom cord connecting device that does not come off during normal use, but will come off before the bottom cord breaks when stepped on. A shaft is provided, a bottom cord fixture is rotatably and detachably fitted onto the shaft, and the fixture and the bottom cord are integrally connected.

The device of this invention will be explained based on the embodiment shown in the drawings.

As shown in FIG. 1, the slat cloth piece 2 of each slat 1 of a vertical blind is inserted into a flat box-shaped lower frame 3.

A headed shaft 4 protrudes from the upper surface of both ends of the lower frame 3, a fixture 5 is rotatably fitted onto the shaft, and the fixture is integrally connected to a bottom cord 6.

The lower frame 3 and the headed shaft 4 are integrally molded products made of synthetic resin.

The fixture 5 is also made of synthetic resin, and as shown in FIG. 2, the side that fits into the headed shaft 4 is an open hollow cylindrical part 7, and the side that is to be integrally molded with the bottom cord 6 passing therethrough is a prismatic part 8. Form.

The inner diameter of the open hollow cylindrical portion 7 is the same as or larger than the diameter of the shaft portion 12 of the headed shaft 4, and the width of the opening 9 is smaller than that.

When molding the fixture 5, the bottom cord 6 is passed through the mold, and the prismatic portion 8 is inserted into the connecting portion 1 passing through the mold of the bottom cord 6.
0 and molded together.

The height of the shaft portion 12 of the headed shaft 4 standing upright from the lower frame 3 is higher than that of the fixture 5, and the head 11 has a length whose short axis is equal to the diameter of the shaft portion 12 and whose long axis is equal to the depth of the lower frame 3. It is desirable to make it circular to facilitate manufacturing and to make it easier to remove the fixture 5 appropriately.

Under normal usage conditions such as opening, closing, and rotating the blind, no unreasonable force is applied to the bottom cord 6, so the fixture 5 will not come off the headed shaft 4. However, when the bottom cord 6 is stepped on, the fixture 5 is pulled very strongly by the bottom cord 6, so that the opening 9 expands elastically and the fixture 5 comes off the headed shaft 4 before the bottom cord 6 is cut.

If the detached fixture 5 is pressed a little forcefully by applying its opening 9 to the shaft portion 12 of the headed shaft 4, it will immediately fit back into the headed shaft 4.

The device of this invention not only prevents the bottom cord from being cut, but also greatly facilitates the connection of the bottom cord, which is useful for streamlining construction work such as installing vertical blinds and replacing slats.

[Brief explanation of drawings]

FIG. 1 is an elevational view showing the essential parts of a vertical blind equipped with a device according to an embodiment of the invention, and FIG. 2 is a perspective view showing the attachment of the lower frame and fixing device shown in FIG. 3: Lower frame, 4: Headed shaft, 5: Fixture, 6: Bottom cord, 7: Opening hollow cylindrical part, 8: Prismatic part, 9: Opening, 10
: Connecting part, 11: Head part, 12: Shaft part.

Claims (1)

[Claims for Utility Model Registration] 1. A headed shaft is provided in the lower frame, a fixture is rotatably fitted onto the shaft of the headed shaft, a bottom cord is passed through the fixture and fixed, and an elastic cord is attached to the fixture. 1. A bottom cord connecting device characterized in that an opening is provided that widens to facilitate attachment to and detachment from the shaft portion. 2. The lower frame and the headed shaft are integrally molded from synthetic resin, and the head of the headed shaft is formed into an oval shape whose minor axis is equal to the diameter of the shaft portion and whose major axis is equal to the depth of the lower frame. is molded from a synthetic resin into a shape consisting of an open hollow cylindrical part and a prismatic part lower than the shaft part, and the inner diameter of the open hollow cylinder part is equal to the diameter of the shaft part. Yoriya)
Utility model registration claim 1 characterized in that it has a small size and that the prismatic portion and the bottom cord are integrally connected.
The bottom cord connecting device described in Section 1.