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Locking structure for telescopic ladder

A technology for locking structures and telescopic ladders, applied in ladders, building structures, buildings, etc., can solve the problem of time-consuming folding of ladders, and achieve the effect of diverse unlocking methods and convenient operation.

Active Publication Date: 2012-09-12
NINGBO XINGFU TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A disadvantage of the aforementioned types of telescopic ladders is that the buttons on each rung must be pressed one at a time to collapse the ladder, which makes folding such ladders time consuming

Method used

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  • Locking structure for telescopic ladder
  • Locking structure for telescopic ladder
  • Locking structure for telescopic ladder

Examples

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Such as Figure 1-9 Shown is a preferred embodiment of the present invention.

[0029] A locking structure for telescopic ladders, including connecting sleeves 3 for connecting joint bars 1 and corresponding rungs 2,

[0030] The inner side of the connecting sleeve 3 has an insertion part 33 which is plugged with the crosspiece 2. The insertion part 33 has a cavity 331. The lower end of the cavity 331 is open, which is convenient for installing various components into the cavity 331. Insert the insertion part 33. The crosspiece 2 is fixed with the crosspiece 2, and the lower end surface of the crosspiece 2 shields the lower opening of the cavity 331; the outer side of the connecting sleeve 3 has an annular surface, and the annular surface forms a socket 34 that is socketed with the joint bar 1. The interface 34 is closely matched with...

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PUM

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Abstract

The invention relates to a locking structure for a telescopic ladder, comprising a connecting sleeve. The connecting sleeve is used for connecting a section rod and a corresponding rail, a bolt is arranged in the connecting sleeve and can horizontally and transversely move corresponding to the connecting sleeve, and the interior of the connecting sleeve is provided with a push knob for driving the bolt to transversely move, which is characterized in that the interior of the connecting sleeve is further provided with an automatically unlocking switch connected with the bolt. The automatically unlocking switch is rotationally arranged in the connecting sleeve, the rotation of the automatically unlocking switch can drive the bolt to transversely move, a jack is arranged on the lower end surface of the connecting sleeve, the upper end surface of the connecting sleeve is provided with a pushing part protruded upwards, and the pushing part can be inserted into a jack of the connecting sleeve in an adjacent higher locking structure so as to push the automatically unlocking switch to rotate. The locking structure for the telescopic ladder can be unlocked in single section step by step andalso automatically unlock the adjacent higher locking structure after a lower locking structure is unlocked.

Description

technical field [0001] The invention relates to a telescopic ladder with a plurality of ladder rods which can slide relative to each other and are nested together, in particular to a locking structure for the telescopic ladder. Background technique [0002] Ladders are often required when repair or maintenance tasks occur in homes, apartments, farms, factories and elsewhere. Ladders must be stowed away somewhere when not in use. Longer ladders allow people to reach higher heights, but are less portable and take up more space when stored. The retractable ladder can extend the ladder when in use, and fold the ladder when storing. [0003] There are a lot of patent documents about telescopic ladders at present, and the U.S. patent No. US7048094 discloses a kind of convenient and safe telescopic ladder like this, and this ladder comprises: the first ladder bar, the second ladder bar and extending between the first ladder bar and the Several crosspieces between the second ladd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E06C7/06
CPCE06C7/06E06C1/125
Inventor 王万兴
Owner NINGBO XINGFU TOOLS