A telescopic ladder

By installing a mounting base and an elastic body at the lower end of the inner tube of the telescopic ladder, and utilizing the different resistances between the suspended section and the inner wall of the outer tube, the damage and safety issues caused by the rapid extension and retraction of the telescopic ladder are solved. This achieves the functions of slow folding and rapid unfolding, improving the safety and stability of use.

CN224314897UActive Publication Date: 2026-06-02YONGKANG MAOHENG IND & TRADE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YONGKANG MAOHENG IND & TRADE CO LTD
Filing Date
2025-05-19
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

During the extension and retraction process, the rapid extension and retraction of adjacent columns of the existing telescopic ladder can easily damage the ladder and pose a safety hazard.

Method used

An mounting base and an elastic body are installed at the lower end of the inner tube. The elastic body includes a suspended section. The limiting part restricts the contact between the suspended section and the inner wall of the outer tube with high resistance or low resistance, so as to realize the slow downward movement and rapid upward movement of the inner tube. The elastic body at the arc corner evenly distributes stress to improve stability.

Benefits of technology

It effectively prevents safety hazards and ladder damage caused by rapid sliding of the inner tube, improves the safety and structural stability of the telescopic ladder, and enhances the ease of operation for users.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224314897U_ABST
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Abstract

A telescopic ladder includes two telescopic rods and multiple footrests connected between the two telescopic rods. Each telescopic rod includes a telescopically fitting inner tube and an outer tube, with the lower end of the inner tube movably fitted within the outer tube. The key feature is that the lower end of the inner tube is provided with a mounting base and an elastic body. The elastic body is fixedly mounted on the mounting base and includes a suspended section. The mounting base includes a limiting part located above the suspended section. The edge of the suspended section contacts the inner wall of the outer tube. When the inner tube descends relative to the outer tube, the suspended section makes contact with the inner wall of the outer tube with high resistance. When the inner tube rises relative to the outer tube, the suspended section can swing downwards to make contact with the inner wall of the outer tube with low resistance. This high-resistance contact ensures that the inner tube will not easily slide down, thus guaranteeing the overall stability of the telescopic ladder structure. During the extension of the telescopic ladder, the suspended section makes contact with the inner wall of the outer tube with low resistance, requiring less force. This allows the user to easily pull out the inner tube and quickly complete the extension operation of the telescopic ladder.
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