Unfolding structure of full-automatic stick umbrella

Abstract

The invention provides an unfolding structure of a full-automatic stick umbrella. The unfolding structure of the full-automatic stick umbrella is used in cooperation with a central rod assembly, an umbrella framework, an umbrella cloth, an upper sleeve, a middle sleeve and an umbrella handle, wherein the central rod assembly, the umbrella framework, the umbrella cloth, the upper sleeve, the middle sleeve and the umbrella handle are arranged in the umbrella, the umbrella cloth is fixed to the umbrella framework, the upper sleeve is fixed to the top end of the central rod assembly, and the central rod assembly is sleeved with the middle sleeve. An unfolding and folding drive mechanism comprises a lead screw and a push tube which is driven by the lead screw to vertically move. The lower end of the lead screw is connected to a power source, used for forward drive and reverse drive, located in the umbrella handle. The central rod assembly comprises a central tube and a movable outer tube, wherein the two ends of the central tube are connected with the umbrella handle and the upper sleeve respectively, the central tube is sleeved with the movable outer tube, and the push tube penetrates through the central tube to be connected with the outer tube. The push tube comprises a lower nut portion, an upper connection portion and a deformation portion, wherein the lower nut portion is matched with the lead screw, the upper connection portion is connected with the outer tube, and the deformation portion is connected with the lower nut portion and the upper connection portion. Due to the fact that the torsion potential energy of the nut portion can be counteracted by the deformation energy of the deformation portion, the connection portion is not influenced by the rotation tendency of the nut portion, the stability of operation of the outer tube is guaranteed, the phenomenon that a central rod of an umbrella vibrates is avoided, the use comfort of the umbrella is guaranteed, and the service life of the umbrella is guaranteed.

Description

technical field [0001] The present invention relates to an umbrella, in particular to a fully automatic straight-bone umbrella opening structure capable of fully opening and fully retracting control. Background technique [0002] In recent years, due to the erratic climate, everyone has the habit of carrying an umbrella to prevent the sudden heavy rain from being drenched. But the early stage umbrellas need to push the umbrella frame up to a certain position by hand to open the umbrella. In case of a sudden rain, it is often too late to open the umbrella and get wet. Therefore, someone has just designed a kind of umbrella, is provided with a button at the handle, presses this button and can automatically open umbrella and does not have automatic umbrella closing function, still needs both hands to fold umbrella and just can enter when wanting to take a car. In the car, it is still vulnerable to rain in this short period of time, so it loses the convenience of the umbrella i...

AI Technical Summary

Problems solved by technology

[0004] But this full-automatic straight-bone umbrella still has some imperfections, that is, when the driving mechanism of opening and closing the umbrella drives the outer tube to move upwards relative to the middle tube to the fully expanded position of the umbrella, the rod in the umbrella will vibrate, causing the user to hold the umbrella while holding it. Discomfort when holding an umbrella handle

The reason for this vibration is that when the screw rod in the driving mechanism drives the push tube to move up to the limit position, the nut in the push tube is driven by the inertial force driven by the screw rod to drive the outer tube fixed with the push rod to the middle tube. There is a tendency to rotate, and the push tube is an integral pipe fitting. The lower part of the nut is affected by the torsional force, and the upper part is transmitted to the outer tube at the same time. A torsional force causes the vibration of the entire umbrella rod. This vibration problem is a problem in long-term use. The existence will inevitably affect the service life of the parachute

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