Umbrella handle with raised bars lined with copper pipe

Abstract

The invention relates to an umbrella handle lining copper tube with strip grid bulges. An inner handle tube and an outer handle tube which are sleeved together and can be drawn and shrunk are arranged on an umbrella handle; the copper tube is fixedly arranged on the inner wall of the outer handle tube and is close to one end where the inner handle tube is sleeved; the outer wall of the inner handle tube can be sleeved in the copper tube in a relatively sliding way; a section of arc-shaped guide groove which is inwards concave is formed in the periphery direction of the copper tube with a circular cross section; the extension direction of the guide groove and the axis of the copper tube are parallel; the shape of the guide groove formed in the copper tube and the shapes of the cross sections of the inner handle tube and the outer handle tube are matched; a plurality of strip bugles with the directions consistent with the axis of the copper tube are arranged on the inner wall of the copper tube. According to the umbrella handle lining copper tube with the strip grid bulges, the strip bulges are arranged along the periphery direction of the inner wall of the copper tube, the friction between the inner wall of the copper tube and the outer wall of the inner handle tube is effectively reduced, the harsh noise which is produced when the inner handle tube and the outer handle tube are drawn and shrunk is better reduced by virtue of ductility of copper, the stabilization and softness of the friction are effectively realized in the drawing and pulling process, and the drawing and pulling abrupt feeling is reduced.

Description

technical field [0001] The invention relates to a lined copper pipe, in particular to an umbrella handle lined copper pipe with lattice protrusions. Background technique [0002] Folding umbrellas are relatively common daily necessities. The umbrella handles of folding umbrellas are usually made of tubular structures that can be inserted into each other and stretched. When the stainless steel outer handle tube is inserted into the inner handle tube, the inner wall of the outer handle tube and the outer wall of the inner handle tube will form The friction is high, and the outer handle tube and the inner handle tube made of stainless steel with high hardness will produce an abnormally harsh sound when they are pulled and rubbed against each other. Umbrella handles are prone to damage due to friction over time. In the prior art, a copper tube with better friction performance is usually arranged between the inner handle tube and the outer handle tube wall. Due to the high price...

AI Technical Summary

Problems solved by technology

However, in the prior art, the friction force between the copper tube and the inner handle tube is relatively large, and it is difficult to fix the copper tube on the inner wall of the outer handle tube, as well as the shape of the guide groove on the copper tube and the cross-sectional shape of the umbrella handle. matching problem

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