Table-chair lifting device easy for height adjustment

Abstract

The invention relates to a table-chair lifting device easy for height adjustment. A table-chair outer support leg is provided with connection holes corresponding to connection holes reserved on a table-chair inner support leg, a bolt can be inserted into two mutually corresponding connection holes, the position of the table-chair inner support leg which is lifted up or lowered is fixed through the bolt, the bolt is hinged to the table-chair outer support leg, a bolt return spring is mounted between the bolt and the table-chair outer support leg, a head of the bolt can penetrate into one connection hole of the table-chair outer support leg and penetrate into the corresponding connection hole on the table-chair inner support leg, the head of the bolt is kept being inserted into the corresponding connection holes of the table-chair inner support leg and the table-chair outer support leg under the action of the bolt return spring, and the a lower contact face, in contact with the corresponding connection hole, of the head of the bolt is a sloping face. The table-chair lifting device has the advantages of simple structure, economization, practicality, easiness for adjustment, high efficiency, safety, reliability and low cost.

Description

technical field [0001] The invention relates to a height-adjustable table and chair lifting device used on a study table, a computer table, a desk, a study chair or other tables and chairs, which can simply and conveniently adjust the height of the table and chairs. Background technique [0002] At present, during the use of study desks, computer desks, desks, study chairs or other tables and chairs, it is sometimes necessary to adjust the height of the desk or chair according to the sitting height of the user, especially as the height of students changes with age. Soon, it is necessary to constantly adjust the height of the table and chair during the use of the table and chair, so as to protect the eyesight of the students. At the same time, during the use of the table and chair, people of different heights have different requirements for the height of the table or chair. All need to adjust the height of table or chair when using. [0003] At present, the table or chair he...

AI Technical Summary

Problems solved by technology

[0003] At present, the table or chair height adjusting device generally has corresponding holes on the double row connecting plates on the two supporting legs connected to each other, and connecting bolts are fixed in the connecting holes between the two supporting legs. height, it is necessary to unscrew the connecting bolts, and install the connecting bolts again between the new connecting holes between the two support legs according to the new height. This table or chair height adjustment device has the disadvantages of complicated operation, difficult adjustment, laborious Defects of time-consuming, high cost, and complex structure; in response to this defect, an automatic height-adjusting device has appeared on the market, but the device is difficult to be accepted by consumers because of its high cost and complex structure.

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