Variable force spring device and roller shutter

CN224338890UActive Publication Date: 2026-06-09CHENGBAO CURTAIN ALLIANCE (GUANGDONG) SHADING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGBAO CURTAIN ALLIANCE (GUANGDONG) SHADING TECH CO LTD
Filing Date
2025-04-15
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing cordless curtains require the production of various specifications of coil spring devices to accommodate different users' window sizes and curtain materials, increasing production complexity and inconvenience for users.

Method used

A variable coil spring device was designed, including a coil spring fixing frame, a spiral spring, and a vertical partition. The spiral spring and the vertical partition can be adjusted by moving along the axial direction of the fixed shaft. The flexible installation and disassembly of the coil spring device are achieved by a limiting crossbar and a one-way locking structure, which reduces production costs.

Benefits of technology

This technology allows for the adjustment of the number of spiral springs according to actual needs, adapting to curtains of different weights, simplifying the production process, reducing production costs, and improving the convenience and safety of operation.

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Abstract

The utility model provides a kind of variable volume spring device and roller shutter, wherein variable volume spring device includes spring fixed frame, multiple spiral springs and multiple vertical partitions for separating spiral spring, spring fixed frame includes fixed shaft and the spring end portion of being arranged in one end of fixed shaft, and spring end portion can rotate relative to fixed shaft;Limiting cross bar corresponding with fixed shaft is extended and arranged on spring end portion, limiting through-hole corresponding with limiting cross bar is equipped on vertical partition;Spiral spring and vertical partition are sequentially and spacedly sleeved on fixed shaft, and limiting cross bar penetrates limiting through-hole when vertical partition is sleeved, and spiral spring and vertical partition can be moved and adjusted along the axial direction of fixed shaft;One end of spiral spring is fixed on fixed shaft, and the other end of spiral spring is connected on limiting cross bar.The utility model can meet the needs of different users without producing multiple specifications of spring device, and reduce production cost.
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