Angle regulating device for blood-drawing chair back plate

Abstract

The present invention discloses an angle adjustment device for a blood collection chair backplane, comprising a seat rack and a backplane rack which are rotatablely connected with each other, an electric handspike which is arranged at the bottom of the backplane rack and is provided with an output shaft and a handspike plate which is rotatablely connected with the bottom of the seat rack. One end of the handspike plate is rotatablely connected with the seat rack. The bottom of the backplane rack is provided with a guide pole, the outer circle wall of which is mounted with a shaft cover which is sliding. The other end of the handspike is rotatablely connected with the shaft cover. The output shaft is rotatablely connected with shaft cover. The output shaft is connected with the shaft cover. The present invention has the advantages that: (1). the motion direction of the output shaft is the same as the motion direction of the shaft cover, the utilization rate of the force of the output shaft is high, the force does work by 100 percent in theory and the motion is more stable; (2). the angle adjustment rang of the structure is large, which can be plus or minus 90 degrees in theory and has low requirement towards the flexing range of the output shaft.

Description

technical field [0001] The invention relates to a device capable of adjusting the angle of the back board of the blood collection chair relative to the seat board. Background technique [0002] The angle adjustment device of the backboard of the existing blood collection chair usually includes a seat frame (1) and a back frame (2) which are rotatably connected, wherein the seat frame (1) is connected with the seat, and the back frame (2) Connected with the backrest, the bottom of the seat frame (1) is connected with a support (11), one end of the support (11) is fixedly connected with the seat frame (1), and the other end Located below the backboard frame (2), the bottom of the backboard frame (2) is rotatably connected with an electric push rod (4), and the electric push rod (4) has an output shaft (41 ), the output shaft (41) is rotationally connected with the other end of the support (11). When the output shaft (41) is extended, the back frame (2) is folded relative to ...

AI Technical Summary

Problems solved by technology

The angle adjustment device of the backboard of the blood collection chair with this structure, because the electric push rod (4) and the backboard frame (2) are connected in rotation, the connection is not stable, so the force of the whole device is not stable; see Figure (2) ), the schematic diagram of the angle adjustment device of the blood collection chair backboard of this structure, the meaning of the slider in the figure is that the output shaft (41) can be stretched, so the rod length of the electric push rod (4) is change, and the rod length corresponding to the backboard frame (2) is constant, because the length variation range of the electric push rod (4) will not exceed half of its own length, so the adjustment of the whole device Angle α range is limited

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