Cordless window covering suspension power device

Abstract

A cordless window curtain suspension device includes a tubular shaft with a first end connector and a second end connector at both ends. A central shaft is located at one end of the first end connector, and at least one power module and a braking module are continuously connected in series on the central shaft. The user can flexibly increase or decrease the number of power modules according to the size and weight of the curtain. In use, pulling down the curtain causes the coil springs in the power modules to store energy; when released, the torsion spring in the braking module generates static friction to balance the weight of the curtain, thus suspending it. Pushing up the curtain releases the torque of the coil springs to assist in its recovery. This invention, through modular design, effectively improves assembly efficiency and reduces production cost pressures.

Claims

1. A cordless window material suspension device, comprising: a tube shaft, including a receiving space, a curtain fixing groove and a braking protrusion, the tube shaft being hollow tube-shaped, so that the receiving space is formed inside, the curtain fixing groove being formed on the outer peripheral surface of the tube shaft and being arranged parallel to the axial direction of the tube shaft, and the braking protrusion being formed on the inner peripheral surface of the tube shaft and also being arranged parallel to the axial direction of the tube shaft; A first end connector is disposed at one end of the tube shaft. The first end connector includes a first outer snap-fit ​​portion, a first bearing, and a first inner snap-fit ​​portion. The first outer snap-fit ​​portion includes a first engagement surface, a first engagement groove, and a plurality of engagement pins. The first engagement surface is formed at one end of the first outer snap-fit ​​portion, and the first engagement groove is formed on its surface. The first bearing is disposed in the first engagement groove, and the first inner snap-fit ​​portion is disposed in the first bearing. The engagement pins are formed by extending along the axial direction of the tube shaft from the outer edge of the first outer snap-fit ​​portion relative to the first engagement surface. A second end connector is disposed at the other end of the tube shaft. A central shaft has its two ends respectively fixed to one end of the second end connector and one end of the first outer snap-fit ​​portion relative to the first engagement surface. At least one power module is provided, each power module comprising a power housing, a power module recess, a plurality of socket pins, a plurality of socket slots, and a coil spring. The power housing is fitted onto the central shaft. The power module recess is formed on the outer peripheral surface of the power housing and is parallel to the axial direction of the power housing. The power module recess is used to fit onto the brake protrusion. One end edge of the power housing extends outward along its axial direction to form the socket pins, and the other end edge of the power housing is recessed inward along its axial direction to form the socket slots. The socket pins and socket slots are respectively located on the same axial direction. The coil spring is disposed inside the power housing. One inner end of the coil spring is fixed to the central shaft, and one outer end of the coil spring is fixed to the inner wall of the power housing. Each of the power module's sockets allows insertion of the socket pins of another power housing or the engagement pins of the first end connector; A brake module includes a brake housing, a brake module recess, an inner pivot block, a torsion spring, and a stop block. The brake housing is hollow inside. The brake module recess is formed on the outer peripheral surface of the brake housing and is parallel to the axial direction of the brake housing. The brake module recess is used to fit onto the brake protrusion. The inner pivot block is pivotally mounted inside the brake housing and is also fitted and fixed to the central shaft. The torsion spring is fitted onto the outer peripheral surface of the inner pivot block, and the two are tightly fitted together. The torsion spring has two end feet at both ends, which extend outward from the outer peripheral surface of the inner pivot block. The stop block is also protruding from the inner wall of the brake housing and is located between the end feet. The power module is fitted onto the central shaft and disposed inside one end of the tube shaft along with the first end fitting.

2. The cordless window material suspension device as claimed in claim 1, wherein the first end connector includes a first outer latching portion, the first outer latching portion includes a plurality of support ribs and a fitting space, the support ribs are formed on the outer peripheral surface of the first outer latching portion, the fitting space is formed between the support ribs, when the first outer latching portion is inserted into one end of the tube shaft, the outer edges of the support ribs are attached to the inner wall of the tube shaft, and the braking protrusion is inserted into the fitting space.

3. The cordless window material suspension device as claimed in claim 1, wherein a first bracket hole is formed on the outer surface of the first inner buckle portion, the first bracket hole being used to engage with a tab of a curtain bracket.

4. The cordless window material suspension device as claimed in claim 1, wherein the first inner latch extends radially outward to form a rotating plate, the outer edge of the rotating plate having a non-slip edge.

5. The cordless window material suspension device as claimed in claim 1, wherein the second end connector includes a second outer latching portion, a second bearing, and a second inner latching portion. The second outer latching portion includes a second engagement surface, a plurality of support ribs, a second engagement groove, and a fitting space. The second engagement surface is formed at one end of the second outer latching portion, and the second engagement groove is formed on its surface. The support ribs are formed on the outer peripheral surface of the second outer latching portion, and the fitting space is formed between the support ribs. When the second outer latching portion is inserted into one end of the tube shaft, the outer edges of the support ribs are attached to the inner wall of the tube shaft, and the braking protrusion is inserted into the fitting space. The second bearing is disposed in the second engagement groove, and the second inner latching portion is disposed in the second bearing.

6. The cordless window material suspension device as claimed in claim 5, wherein a second bracket hole is formed on the outer surface of the second inner buckle portion, the second bracket hole being used to engage with a tab of a curtain bracket.

7. The cordless window material suspension device as claimed in claim 1, wherein the central shaft includes a plurality of grooves formed on the outer circumferential surface of the central shaft and arranged parallel to the axial direction of the central shaft, and a brake module through hole is passed through both ends of the inner pivot block, and a plurality of fitting protrusions are provided on the inner edge of the brake module through hole, the fitting protrusions being used to fit into the grooves, so that when the central shaft rotates, the inner pivot block can rotate along with it.

8. The cordless window material suspension device as claimed in claim 1, wherein the central shaft includes a plurality of pin holes, the pin holes being arranged equidistantly along the axial direction of the central shaft and extending through the central shaft radially, the pin holes being used to insert a plurality of pins.

9. The cordless window suspension power device as claimed in claim 8, wherein the spacing of the pin holes is the same as the length of the power module or the brake module.

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