Lifting and locking device for table and chair legs

Abstract

The invention discloses a lifting locking device of a table and chair foot, and belongs to the technical field of table and chair devices. The lifting locking device includes supporting legs. Each supporting leg includes an outer supporting column and an inner supporting column which are in pulling insertion connection with each other; a locking mechanism is arranged between a lower end of the outer supporting column and the inner supporting column; a pre-tensioning spring is arranged between an upper end of the inner supporting column and a bottom surface of a table and chair board; a steel wire rope is fixed on the upper end of the inner supporting column; the other end of the steel wire rope penetrates an upper part of the outer supporting column, passes a synchronous rope combination mechanism, and finally is stored in a rope collection drive mechanism; the rope collection drive mechanism includes a second winding shaft and a second fixing barrel sleeving the second winding shaft in a clearance manner, and a tail end of the second winding shaft is connected to a rocking handle; the synchronous rope combination mechanism includes a big gear and four small gears which are evenlyengaged with a surface of the big gear; one end of the winding shaft is fixed and sleeved with the small gears; and the winding shaft is sleeved with a fixing barrel in a clearance manner. Lifting adjustment of the table and chair board can be performed from top to bottom, can save effort, and is easy to perform; synchronous motion of the four supporting legs can be effectively ensured; and the lifting locking device is skillful in structural design, and is easy to operate.

Description

technical field [0001] The invention relates to the technical field of table and chair equipment, in particular to a lifting and locking device for table and chair legs. Background technique [0002] A large number of adjustable desks are used in European and American countries, and the common ones are mostly used for learning, office work, and surfing the Internet. And domestic gradually recognized and began to be widely used. Its value is to help office workers bid farewell to sedentary and realize standing office. After the investigation of the development history of furniture in the world by research scholars, it is found that after walking upright, human beings find that sitting down is beneficial to reduce fatigue in daily activities, thus inventing the seat. This way of sitting and working has been passed down, but as people sit and work for longer and longer, people gradually realize that sitting for a long time is not conducive to the improvement of work efficienc...

AI Technical Summary

Problems solved by technology

When lifting and adjusting, open the locking device one by one and lift the inner pillars upwards. Due to the gravity pressure of the table and chair panel, the adjustment process is laborious and inconvenient; in this way, the height of each leg is adjusted separately, and the lifting adjustment process is slow. , and it is difficult to maintain the flatness of the table and chair panel during the adjustment process

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