Furniture hinge spring connecting structure and method for prolonging service life thereof

Abstract

The invention relates to a furniture hinge spring connecting structure and a method for prolonging service life thereof. The furniture hinge spring connecting structure comprises a fixed arm and a movable cup seat, wherein the movable cup seat is connected with the fixed arm at least by an outer swinging arm and an inner swinging arm; the front end of the outer swinging arm is articulated with the movable cup seat, and the rear end is articulated with the fixed arm in a direct way or by more than one connecting arm; a torsion spring which applies closed acting force on the movable cup seat is also arranged below the rear end of the outer swinging arm; the upper end of the torsion spring is connected with the outer swinging arm, and the lower end is connected with parts except for the outer swinging arm; and when the movable cup seat is closed, an included angle alpha of the installation plane of the movable cup seat and a connecting line between a connecting contact point of the upper end of the torsion spring as well as the outer swinging arm and a central point of the torsion spring is between negative 0 degree and 70 degrees. The invention achieves the aim of improving the service life of the torsion spring by reducing the diameter of a steel wire of the torsion spring and the position of the contact point of the torsion spring and the outer swinging arm without changing the outer diameter of the torsion spring and ensures that a hinge is automatically completely opened or completely closed by the acting force of the torsion spring when opened or closed to a certain angle.

Description

technical field [0001] The invention relates to a furniture hinge, in particular to a furniture hinge spring connection structure and a method for extending its service life. Background technique [0002] Existing furniture hinge spring connection structure see Figure 1-Figure 3 , comprising a fixed arm 21 , an inner swing arm 22 , an outer swing arm 24 and a movable cup holder 25 . The front and rear ends of the outer swing arm 24 are respectively hinged with the movable cup holder and the fixed arm through pin shafts; A torsion spring 23 that generates a closing force to the movable cup holder is sheathed on the hinged pin of the outer swing arm and the fixed arm. The outer swing arm 24 is channel-shaped, and a cover plate 24.1 for covering the torsion spring is extended from the top surface of the rear end, and a step 24.2 is formed between the two sides of the cover plate and the two sides of the outer swing arm; the upper end of the torsion spring 23 rests on the step...

AI Technical Summary

Problems solved by technology

In the process of continuously opening and closing the life test of the hinge, when the ratio is greater than 4, the torsion spring can withstand more than 50,000 opening and closing tests, which can meet the index; when the ratio is less than 4, the torsion spring will be damaged by metal Disconnect due to fatigue, resulting in product scrap

For the hinge in the above structure, because the torsion spring is limited by the installation position, its outer diameter cannot be increased; in addition, because the utilization rate of the force when the spring is released is low, the diameter of the steel wire of the torsion spring must be more than 1mm; comprehensive two aspects In the continuous working life test, the torsion spring will generally be scrapped within 50,000 times.

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