Self-locking drawbar and draw-bar box

Abstract

The invention relates to a self-locking drawbar and a draw-bar box. The self-locking drawbar comprises an outer pipe and an inner pipe, wherein the outer pipe sleeves the inner pipe, a plurality of outer pipe stop and receive buckle keyholes are formed in the side surface of the outer pipe, a stop and receive buckle is fixed to the bottom of the inner pipe, when the drawbar is inclined, the stop and receive buckle is inclined by gravity, bottom protrusions slide into the outer pipe stop and receive buckle keyholes to clamp the inner pipe, and thus the inner pipe cannot go down; when the innerpipe is pulled upwards, the stop and receive buckle slides out of the outer pipe stop and receive buckle keyholes by the downward force of the side wall of the outer pipe, and the inner pipe is pulledupwards freely. Self-locking of the drawbar is accomplished through matching of the stop and receive buckle with the outer pipe and the inner pipe, manifold components and parts of a traditional drawbar such as a button, a spring, a sliding block, a pressing rod and a pressing foot are not needed, the structure is simple, the weight of the drawbar is reduced, the manufacturing cost is reduced, the production process is simplified, the overall design sense of the drawbar is enhanced, and the self-locking drawbar is convenient for users to use.

Description

technical field [0001] The invention relates to the technical field of pull rods, more specifically, to a self-locking pull rod and a pull rod case. Background technique [0002] At present, the pull rod mechanism of the trolley box is a combination of inner and outer tubes. The button on the top controls the slider at the lower part, and the spring is used to pop the slider out of the hole on the tube wall to block the outer tube. Then press the button, the slider shrinks, and the outer tube The tube can be drawn and slid freely, and the whole tie rod structure has many parts, and the structure and production process are complicated. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a self-locking trolley and trolley case, which has a simple structure and does not require many parts such as buttons, springs, and sliders of the traditional trolley, thereby reducing manufacturing costs and simplifying the production...

AI Technical Summary

Problems solved by technology

[0002] At present, the pull rod mechanism of the trolley box is a combination of inner and outer tubes. The button on the top controls the slider at the lower part, and the spring is used to pop the slider out of the hole on the tube wall to block the outer tube. Then press the button, the slider shrinks, and the outer tube The tube can be drawn and slid freely, and the whole tie rod structure has many parts, and the structure and production process are complex

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