Floor spring with function of delaying door opening

Abstract

The invention discloses a floor spring with the function of delaying door opening. The floor spring comprises a shell, a piston, a connecting rod, a spring body, a cam, rolling wheels and a supporting plate; the piston, the connecting rod, the spring body, the cam, the rolling wheels and the supporting plate are all arranged in the shell; the two ends of the connecting rod are fixed to the piston and the supporting plate respectively, and the connecting rod is sleeved with the spring body; the cam is installed on the supporting plate, the cam rotates to drive the supporting plate to move and is matched with the rolling wheels, and a door rotates to drive the cam to rotate; when the opening angle of the door is within the range of 0 to 65 degrees, the curvature of the contact points of the cam and the rolling wheels is gradually increased. The curvature of the contact points of the cam and the rolling wheels is gradually increased when the opening angle of the door is within the range of 0 to 65 degrees; accordingly, when the door is opened within the range of 0 to 65 degrees, the resistance to the cam during rotating is increased; when the door is opened under the effect of uniform force, the resistance to the door is increased; accordingly, the opening speed of the door is reduced, the effect of delaying door opening is achieved, the situations that the door is opened too fast and the door collides with interference objects are avoided, and the safety performance is improved.

Description

[0001] This application is a divisional application of "mechanical door-opening delay floor spring". The filing date of the original application is 2015.08.07, and the application number is 201510483173.8. The invention and creation name of the original application is: mechanical door-opening delay floor spring. technical field [0002] The invention belongs to a door closing device, in particular to a floor spring with a door opening delay. Background technique [0003] When the floor spring is in use, the rotation of the door drives the rotation of the cam in the floor spring, and the floor spring bears the load on the door, and the door can rotate on the floor spring to realize opening and closing. But the existing floor springs only have the function of closing the door delay, that is, the inside of the floor spring has a buffer force within a certain angle range before the door is completely closed, so that the cam rotates slowly, so that the closing speed of the door is...

AI Technical Summary

Problems solved by technology

But the existing floor spring only has the function of closing the door delay, that is, the inside of the floor spring has a buffer force within a certain angle range before the door is completely closed, so that the cam rotates slowly, so that the closing speed of the door is relatively slow; because there is no BC function ( Door opening delay function), so that when the door does not have the door opening delay function, it is easy to collide with interfering objects when opening the door, and the safety performance is reduced

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