| CPC A61G 7/015 (2013.01) [A61G 7/008 (2013.01); A61G 7/018 (2013.01)] | 7 Claims |
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1. A semi-recumbent position adjustable nursing bed with a large lateral tilting angle, comprising a bed frame, a back support and a leg support, the back support and the leg support being arranged on the bed frame, a back side-tilt for lateral tilting of the back support being arranged on the bed frame, a leg side-tilt for lateral tilting of the leg support being further arranged on the bed frame, wherein the semi-recumbent position adjustable nursing bed with a large lateral tilting angle further comprises a leveling adjuster;
the leveling adjuster is arranged between the bed frame and the leg side-tilt, the leveling adjuster enabling the leg side-tilt to move in a horizontal direction relative to the bed frame;
the back support comprises a left back portion, a right back portion and a middle back portion in a width direction of the bed frame, the middle back portion connecting the left back portion and the right back portion, and the back side-tilt acts on the middle back portion;
the leg support comprises a left leg portion, a right leg portion and a middle leg portion in the width direction of the bed frame, the middle leg portion connecting the left leg portion and the right leg portion, the leg side-tilt acts on the middle leg portion, the left back portion corresponds to the left leg portion, the right back portion corresponds to the right leg portion, and the middle back portion corresponds to the middle leg portion;
the leg side-tilt comprises a lateral tilting motor, an output end of the lateral tilting motor is connected to a left side of the bed frame through the leveling adjuster, an opposite end of the lateral tilting motor is hinged to a first swing arm, and one end of the first swing arm is hinged to a right side of the bed frame through a first supporting block; a second swing arm is fixedly connected to the first swing arm, one end of the second swing arm is hinged to a right side of the middle leg portion through a first connecting rod, a second supporting block is fixedly connected to a middle portion of the bed frame, and an upper end of the second supporting block is hinged to a middle position of the middle leg portion; a left end of the middle leg portion is hinged to a third swing arm, a right side of the left leg portion is hinged to the third swing arm, and the third swing arm is hinged to the second supporting block through a second connecting rod; and a right end of the middle leg portion is hinged to a fourth swing arm, a left side of the right leg portion is hinged to the fourth swing arm, and the fourth swing arm is hinged to the second supporting block through a third connecting rod;
a cavity is formed in the middle leg portion, two toothed blocks are slidably arranged at a left end and a right end of the cavity, respectively, a counterweight is further arranged in the middle of the cavity, each of the two toothed blocks is connected to the counterweight through a elastic rope, two tilting boards are arranged in the cavity, each corresponding to a respective one of the two toothed blocks;
a center point of each of the two tilting boards is hinged to the middle leg portion, a hinge point being provided with a first elastic member, an elastic force of the first elastic member allows an end of each of the two tilting boards close to the center of the cavity to always have a downward deflection trend, a limiting groove is formed at a bottom of the center of the cavity, and when the counterweight is located at the center of the cavity, an end of each of the two tilting boards close to the center of the cavity abuts against the bottom of the center of the cavity under the elastic force of the first elastic member, so that a protrusion on the counterweight is plugged to the limiting groove;
a first gear is rotatably arranged on a left side of the middle leg portion, a second gear is fixedly connected to a right side of the left leg portion, the first gear is meshed with the second gear, a third gear is rotatably arranged on the right side of the middle leg portion, a fourth gear is fixedly connected to the left side of the right leg portion, the third gear is meshed with the fourth gear, and when the counterweight is plugged to the limiting groove, the two toothed blocks are away from the first gear and the third gear respectively;
a third supporting block is slidably arranged on the third swing arm, a second elastic member is connected between the third swing arm and the third supporting block in a sliding direction of the third supporting block, a fourth supporting block is slidably arranged on the fourth swing arm, a third elastic member is connected between the fourth swing arm and the fourth supporting block in a sliding direction of the fourth supporting block, when the left side of the middle leg portion swings downward, the third supporting block supports the right side of the left leg portion, and when the right side of the middle leg portion swings downward, the fourth supporting block supports the left side of the right leg portion; and
a fifth supporting block is slidably arranged on each of the two toothed blocks, the fifth supporting block is in sliding contact with a respective one of the two tilting boards, a fourth elastic member is connected between the fifth supporting block and a respective one of the two toothed blocks in a sliding direction of the fifth supporting block, a first non-elastic rope is connected between the third supporting block and the adjacent respective fifth supporting block, a second non-elastic rope is connected between the fourth supporting block and the adjacent respective fifth supporting block, a stiffness coefficient of the fourth elastic member is smaller than a stiffness coefficient of the second elastic member, a stiffness coefficient of the fourth elastic member is smaller than a stiffness coefficient of the third elastic member, and the stiffness coefficient of the second elastic member and the stiffness coefficient of the third elastic member are both smaller than a stiffness coefficient of the elastic rope.
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