Bead chain holding device for blind

A bead chain holding device, provided for a blind, and the bead chain holding comprising a holder, a bead chain wheel and a knob, wherein,

• the holder comprises a space therein, wherein the space is provided for the bead chain wheel corresponding to a movement of a bead chain, a first side of the holder is connected to a protruding frame comprising an accommodating portion, and a second side of the holder comprises a hollow portion, a first lock portion adjacent the hollow portion and facing the first side, and an engage portion protruding toward the knob;
• the bead chain wheel comprises a spring presser at a side of the bead chain wheel and a second lock portion at an other side of the bead chain wheel, wherein the spring presser is disposed in the accommodating portion, and the second lock portion is configured to engage or disengage with the first lock portion;
• and
• the knob comprises a protruding body at a side of the knob near the holder, wherein the protruding body is configured to engage or disengage with the engage portion,
• wherein the bead chain holding device is configured to unlock the bead chain wheel to enable the bead chain to be pulled by pressing and rotating the knob to compress the spring presser to disengage the second lock portion from the first lock portion and engage the protruding body with the engage portion;
• and the bead chain holding device is configured to lock the bead chain wheel to prevent the bead chain from being pulled by rotating and releasing the knob to disengage the protruding body from the engage portion and releasing the spring presser to push the bead chain wheel to engage the second lock portion with the first lock portion.