CN209984480U - A new type of nursing bed with lifting and back lifting functions - Google Patents

Abstract

The utility model discloses a novel nursing bed with go up and down and lift back of body function belongs to the nursing bed field. The utility model discloses a bed body mechanism, elevating system, self-locking mechanism, lift back of the body mechanism, prevent mechanism that sideslips. The bed body mechanism mainly realizes the integral supporting function; the lifting mechanism drives the nut to slide through the rotation of the screw rod, and meanwhile, the bed body mechanism fixedly connected with the clamping jaws slides up and down, so that the lifting function of the nursing bed is realized; the self-locking mechanism is combined with the transmission shaft, so that the safety of the nursing bed is ensured; the back lifting mechanism is used for driving the back plate to lift and simultaneously driving the back plate to move upwards along the frame, so that the back lifting function of the nursing bed is realized; the sideslip prevention mechanism drives the nuts symmetrically arranged on two sides of the sideslip prevention mechanism to move through the rotation of the lead screw, the connecting rod is pushed to drive the left back plate and the right back plate to rotate inwards, and a user is prevented from sideslipping when the nursing bed is lifted. The utility model discloses can realize nursing bed's lift and lift back of the body function to satisfy user's different needs, possess characteristics such as practicality is strong, the security is high.

Description

A new type of nursing bed with lifting and back lifting functions

technical field

The utility model belongs to the field of nursing beds, in particular to a novel nursing bed with lifting and back lifting functions.

Background technique

Nursing beds can effectively improve the comfort of the elderly or patients in bed. Judging from the existing patent searches, the existing patents have invented nursing beds with various functions, but in actual life, there are still many problems with nursing beds: (1) the height of the bed body cannot be adjusted accurately, (2) When the back panel is lifted, it is easy to cause the back of the user to be squeezed, and the anti-slip mechanisms on the left and right sides of the back panel cannot be adjusted synchronously. Therefore, the present invention is proposed.

SUMMARY OF THE INVENTION

The utility model proposes a novel nursing bed with lifting and back lifting functions to solve the problems involved in the above background technology. Its technical solution is: a new type of nursing bed with lifting and lifting functions, including a bed body mechanism, a lifting mechanism, a self-locking mechanism, a back lifting mechanism and an anti-side-slip mechanism, and is characterized in that: the sliding pillars of the bed body mechanism 14 slides along the inner wall of the external cavity of the head frame 11 or the bed end frame 12; the sliding rail block 27 of the lifting mechanism drives the longitudinal rod 16 of the bed body to move through the claws 28; the self-locking mechanism controls the cylinder through the sensor arranged on the sliding rail block 27 34 is opened and closed to realize the unlocking or reset of the self-locking mechanism; the worm wheel 41 and the worm 42 of the back-lifting mechanism constitute a self-locking mechanism, and the rotation of the gear 45 drives the middle back plate 47 fixedly connected with the rack 46 to move upward; The second nut 502 drives the fourth connecting rod 505 to rotate through the first hinge support 507 to realize the inward rotation of the left back plate 509 or the right back plate 510 .

The bed body mechanism includes a bed head frame 11, a bed end frame 12, a connection box 13, a sliding column 14, a bed body cross bar 15, and a bed body longitudinal bar 16. The connection box 13 is fixed to the bed head frame 11 or the bed end frame 12 by bolts. On the inner side, the sliding strut 14 is installed in the outer cavity of the head frame 11 or the bed end frame 12, and slides along the inner wall of the cavity. connect.

The lifting mechanism includes a first screw 21, a smooth screw 22, a first nut 23, a smooth screw slider 24, a first screw fixing seat 25, a slide rail 26, a slide rail block 27, a clamping claw 28, a first screw The screw fixing base 25 is fixed on the inner wall of the slide rail 26 by bolts, the first lead screw 21 and the light screw 22 are rotatably matched with the first screw fixing base 25 through the bearing, the first nut 23 is sleeved on the first lead screw 21, and the light The bar slider 24 is sleeved on the light bar 22, the slide rail block 27 is fixed on the first nut 23 or the upper end face of the light bar slider 24 by bolts, the claws 28 are connected with the slide rail block 27 by bolts, and the claws 28 are connected by bolts It is connected with the longitudinal bar 16 of the bed body.

Two smooth rods 22 are arranged symmetrically on both sides of the first lead screw 21; the first lead screw 21 rotates to drive the first nut 23 to move along the first lead screw 21, and the smooth rod slider 24 slides along the smooth rod 22. The nut 23 and the smooth bar slider 24 drive the slide rail block 27 to slide along the slide rail 26; the upper end of the slide rail 26 is fixed to the lower end surface of the beam of the head frame 11 or the bed end frame 12 by bolts; the lower end of the slide rail 26 is fixed to the connection box 13 by bolts The upper end face; the slide rail block 27 is equipped with a sensor to monitor the motion information of the slide rail block 27 and transmit the motion information to the control system, which controls the cylinder 34 to start or close.

The self-locking mechanism includes a first connecting rod 31, a second connecting rod 32, a third connecting rod 33, a cylinder 34, a first transmission shaft 35, an upper pawl 36, a lower pawl 37, a pawl mounting block 38, and a ratchet wheel. 39. The first link 31 is hinged with the push rod of the cylinder 34, the third link 33 is hinged with the pawl mounting block 38, the first link 31 and the third link 33 are hinged with the second link 32, and the upper pawl 36 And the lower pawl 37 is hinged with the pawl mounting block 38 , the ratchet wheel 39 is installed on the first transmission shaft 35 through a key, and the upper pawl 36 and the lower pawl 37 are in contact with the teeth of the ratchet wheel 39 .

The upper pawl 36, the lower pawl 37 and the ratchet 39 form a self-locking mechanism; the slide rail block 27 is lowered, the control system controls the cylinder 34 to start, the cylinder 34 pushes the third link 33 to move, the upper pawl 36 and the lower pawl 37 is out of contact with the teeth of the ratchet wheel 39, and the self-locking mechanism is unlocked; the slide rail block 27 rises or stops moving, the cylinder 34 is reset, the upper pawl 36 and the lower pawl 37 are re-contacted with the teeth of the ratchet wheel 39, and the self-locking mechanism is reset to prevent The first lead screw 21 and the first transmission shaft 35 are reversed, causing damage to the motor; the self-locking mechanism is arranged in the cavity of the connection box 13 .

The back lift mechanism includes a worm wheel 41, a worm 42, a second drive shaft 43, a back lift block 44, a gear 45, a rack 46, a middle back plate 47, and a middle frame 48. The worm wheel 41 is installed on the second drive shaft 43 by a key. On the upper side, the worm 42 is connected with the output shaft of the reduction box through a coupling, the back lift block 44 is installed on the second transmission shaft 43 by a key, the back lift block 44 is connected with the middle frame 48 by a bolt, and the gear 45 is installed on the second transmission shaft 48 by a key. On the transmission shaft 43 , the rack 46 is fixed to the lower end surface of the middle back plate 47 by bolts.

The worm wheel 41 and the worm 42 form a self-locking mechanism to prevent the user from leaning back too much, causing the motor shaft to reverse and causing damage to the motor; the rotation of the second transmission shaft 43 drives the back-lifting block 44 to rotate, and the back-lifting block 44 drives the The middle frame 48 rotates to lift the middle back plate 47; the middle back plate 47 slides up and down along the length direction of the middle frame 48; the gear 45 and the rack 46 form a rack and pinion transmission mechanism; the rotation of the second transmission shaft 43 drives the gear 45 to rotate, The rack 46 moves up along the middle frame 48 , and the rack 46 drives the middle back plate 47 to move upward to prevent the back of the user from being squeezed when the back is lifted;

The anti-slip mechanism includes a second lead screw 501, a second nut 502, a second lead screw fixing seat 503, a lead screw box 504, a fourth connecting rod 505, a fifth connecting rod 506, a first hinge support 507, The second hinge support 508, the left back plate 509, the right back plate 510, the left frame 511, the right frame 512, the hinge 513, the first sprocket 514, the second sprocket 515, the chain 516, the lead screw box 504 passes through the The five connecting rods 506 are connected to the middle frame 48 , the second lead screw fixing seat 503 is fixed on the inner wall of the lead screw box 504 by bolts, the second lead screw 501 is rotatably matched with the second lead screw fixing seat 503 through a bearing, and the second nut 502 is set Set on the second screw 501, the first hinge support 507 is fixed on the upper end surface of the second nut 502 by bolts, the fourth connecting rod 505 is hinged with the first hinge support 507, and the fourth connecting rod 505 is connected with the second hinge support The seat 508 is hinged, the second hinge support 508 is fixed to the lower end surface of the left back plate 509 or the right back plate 510 by bolts, the left back plate 509 is fixed to the left frame 511, the right back plate 510 is fixed to the right frame 512, the left frame 511 and the The right frame 512 is connected with the middle frame 48 through the hinge 513, the first sprocket 514 is installed on the second lead screw 501 through a key, and the second sprocket 515 is installed on the motor output shaft through a key.

The lead screw box 504 is parallel to the middle frame 48, and the distance remains unchanged; the two ends of the second lead screw 501 are provided with threads, both of which are trapezoidal threads, and have self-locking ability; the threads at both ends of the second lead screw 501 are reversed The second nut 502 moves along the second lead screw 501; the second nut 502 is symmetrically arranged at both ends of the second lead screw 501; the second lead screw 501 rotates to drive the second nut 502 to move in opposite directions respectively; The fourth link 505 is pushed to rotate by the first hinge support 507, and the fourth link 505 drives the left back plate 509 or the right back plate 510 to rotate inward.

Description of drawings

Fig. 1 is the schematic diagram of the bed body mechanism of the present utility model;

2 is a schematic diagram of the lifting mechanism of the present utility model;

3 is a schematic diagram of the self-locking mechanism of the present invention;

4 is a schematic diagram of the back-lifting mechanism of the present invention;

FIG. 5 is a schematic diagram of the anti-side-slip mechanism of the present invention.

The figure is marked as:

11—bed head frame; 12—bed end frame; 13—connection box; 14—sliding strut; 15—bed body crossbar; 16—bed body longitudinal bar;

21—the first screw; 22—the smooth rod; 23—the first nut; 24—the smooth rod slider; 25—the first screw fixing seat; 26—the slide rail; 27—the slide rail block; 28—the clamping jaw;

31—first connecting rod; 32—second connecting rod; 33—third connecting rod; 34—cylinder; 35—first drive shaft; 36—upper pawl; 37—lower pawl; 38—pawl mounting block ;39—ratchet;

41—worm gear; 42—worm; 43—second drive shaft; 44—back lift block; 45—gear; 46—rack; 47—middle back plate; 48—middle frame;

501—second screw; 502—second nut; 503—second screw holder; 504—screw box; 505—fourth connecting rod; 506—fifth connecting rod; 507—first hinge support; 508—Second hinge support; 509—Left back panel; 510—Right back panel; 511—Left frame; 512—Right frame; 513—Hinge; 514—First sprocket; 515—Second sprocket; 516 - Chains.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be described in further detail below with reference to FIGS. 1 , 2 , 3 , 4 and 5 . As can be seen from Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, a new type of nursing bed with lifting and back lifting functions includes a bed body mechanism, a lifting mechanism, a self-locking mechanism, a back lifting mechanism and an anti-slip mechanism. , which is characterized in that: the sliding pillar 14 of the bed body mechanism slides along the inner wall of the external cavity of the bed head frame 11 or the bed end frame 12; the sliding rail block 27 of the lifting mechanism drives the bed body longitudinal rod 16 to move through the claws 28; the self-locking mechanism The sensor arranged on the slide block 27 controls the opening and closing of the cylinder 34 to realize the unlocking or resetting of the self-locking mechanism; the worm gear 41 and the worm 42 of the back-lifting mechanism constitute a self-locking mechanism, and the gear 45 rotates to drive the middle back fixedly connected to the rack 46. The plate 47 moves up; the second nut 502 of the anti-sideslip mechanism drives the fourth connecting rod 505 to rotate through the first hinge support 507 to realize the inward rotation of the left back plate 509 or the right back plate 510 .

The bed body mechanism includes a bed head frame 11, a bed end frame 12, a connection box 13, a sliding column 14, a bed body cross bar 15, and a bed body longitudinal bar 16. The connection box 13 is fixed to the bed head frame 11 or the bed end frame 12 by bolts. On the inner side, the sliding strut 14 is installed in the outer cavity of the head frame 11 or the bed end frame 12, and slides along the inner wall of the cavity. connect.

The lifting mechanism includes a first screw 21, a smooth screw 22, a first nut 23, a smooth screw slider 24, a first screw fixing seat 25, a slide rail 26, a slide rail block 27, a clamping claw 28, a first screw The screw fixing base 25 is fixed on the inner wall of the slide rail 26 by bolts, the first lead screw 21 and the light screw 22 are rotatably matched with the first screw fixing base 25 through the bearing, the first nut 23 is sleeved on the first lead screw 21, and the light The bar slider 24 is sleeved on the light bar 22, the slide rail block 27 is fixed on the first nut 23 or the upper end face of the light bar slider 24 by bolts, the claws 28 are connected with the slide rail block 27 by bolts, and the claws 28 are connected by bolts It is connected with the longitudinal bar 16 of the bed body.

Two smooth rods 22 are arranged symmetrically on both sides of the first lead screw 21; the first lead screw 21 rotates to drive the first nut 23 to move along the first lead screw 21, and the smooth rod slider 24 slides along the smooth rod 22. The nut 23 and the smooth bar slider 24 drive the slide rail block 27 to slide along the slide rail 26; the upper end of the slide rail 26 is fixed to the lower end surface of the beam of the head frame 11 or the bed end frame 12 by bolts; the lower end of the slide rail 26 is fixed to the connection box 13 by bolts The upper end face; the slide rail block 27 is equipped with a sensor to monitor the motion information of the slide rail block 27 and transmit the motion information to the control system, which controls the cylinder 34 to start or close.

The self-locking mechanism includes a first connecting rod 31, a second connecting rod 32, a third connecting rod 33, a cylinder 34, a first transmission shaft 35, an upper pawl 36, a lower pawl 37, a pawl mounting block 38, and a ratchet wheel. 39. The first link 31 is hinged with the push rod of the cylinder 34, the third link 33 is hinged with the pawl mounting block 38, the first link 31 and the third link 33 are hinged with the second link 32, and the upper pawl 36 And the lower pawl 37 is hinged with the pawl mounting block 38 , the ratchet wheel 39 is installed on the first transmission shaft 35 through a key, and the upper pawl 36 and the lower pawl 37 are in contact with the teeth of the ratchet wheel 39 .

The upper pawl 36, the lower pawl 37 and the ratchet 39 form a self-locking mechanism; the slide rail block 27 is lowered, the control system controls the cylinder 34 to start, the cylinder 34 pushes the third link 33 to move, the upper pawl 36 and the lower pawl 37 is out of contact with the teeth of the ratchet wheel 39, and the self-locking mechanism is unlocked; the slide rail block 27 rises or stops moving, the cylinder 34 is reset, the upper pawl 36 and the lower pawl 37 are re-contacted with the teeth of the ratchet wheel 39, and the self-locking mechanism is reset to prevent The first lead screw 21 and the first transmission shaft 35 are reversed, causing damage to the motor; the self-locking mechanism is arranged in the cavity of the connection box 13 .

The back lift mechanism includes a worm wheel 41, a worm 42, a second drive shaft 43, a back lift block 44, a gear 45, a rack 46, a middle back plate 47, and a middle frame 48. The worm wheel 41 is installed on the second drive shaft 43 by a key. On the upper side, the worm 42 is connected with the output shaft of the reduction box through a coupling, the back lift block 44 is installed on the second transmission shaft 43 by a key, the back lift block 44 is connected with the middle frame 48 by a bolt, and the gear 45 is installed on the second transmission shaft 48 by a key. On the transmission shaft 43 , the rack 46 is fixed to the lower end surface of the middle back plate 47 by bolts.

The worm wheel 41 and the worm 42 form a self-locking mechanism to prevent the user from leaning back too much, causing the motor shaft to reverse and causing damage to the motor; the rotation of the second transmission shaft 43 drives the back-lifting block 44 to rotate, and the back-lifting block 44 drives the The middle frame 48 rotates to lift the middle back plate 47; the middle back plate 47 slides up and down along the length direction of the middle frame 48; the gear 45 and the rack 46 form a rack and pinion transmission mechanism; the rotation of the second transmission shaft 43 drives the gear 45 to rotate, The rack 46 moves up along the middle frame 48 , and the rack 46 drives the middle back plate 47 to move upward to prevent the back of the user from being squeezed when the back is lifted;

The anti-slip mechanism includes a second lead screw 501, a second nut 502, a second lead screw fixing seat 503, a lead screw box 504, a fourth connecting rod 505, a fifth connecting rod 506, a first hinge support 507, The second hinge support 508, the left back plate 509, the right back plate 510, the left frame 511, the right frame 512, the hinge 513, the first sprocket 514, the second sprocket 515, the chain 516, the lead screw box 504 passes through the The five connecting rods 506 are connected to the middle frame 48 , the second lead screw fixing seat 503 is fixed on the inner wall of the lead screw box 504 by bolts, the second lead screw 501 is rotatably matched with the second lead screw fixing seat 503 through a bearing, and the second nut 502 is set Set on the second screw 501, the first hinge support 507 is fixed on the upper end surface of the second nut 502 by bolts, the fourth connecting rod 505 is hinged with the first hinge support 507, and the fourth connecting rod 505 is connected with the second hinge support The seat 508 is hinged, the second hinge support 508 is fixed to the lower end surface of the left back plate 509 or the right back plate 510 by bolts, the left back plate 509 is fixed to the left frame 511, the right back plate 510 is fixed to the right frame 512, the left frame 511 and the The right frame 512 is connected with the middle frame 48 through the hinge 513, the first sprocket 514 is installed on the second lead screw 501 through a key, and the second sprocket 515 is installed on the motor output shaft through a key.

The lead screw box 504 is parallel to the middle frame 48, and the distance remains unchanged; the two ends of the second lead screw 501 are provided with threads, both of which are trapezoidal threads, and have self-locking ability; the threads at both ends of the second lead screw 501 are reversed The second nut 502 moves along the second lead screw 501; the second nut 502 is symmetrically arranged at both ends of the second lead screw 501; the second lead screw 501 rotates to drive the second nut 502 to move in opposite directions respectively; The fourth link 505 is pushed to rotate by the first hinge support 507, and the fourth link 505 drives the left back plate 509 or the right back plate 510 to rotate inward.

Working principle: the rotation of the first lead screw 21 drives the first nut 23 to move along the first lead screw 21. At the same time, the slide rail block 27 connected with the first nut 23 slides up and down along the slide rail 26, and the slide rail block 27 passes through The jaws 28 drive the bed body longitudinal rod 16 to rise or fall, and the bed body longitudinal rod 16 drives the sliding pillar 14 to slide along the inner wall of the outer cavity of the bedside frame 11 or the bed end frame 12 to realize the lifting function of the nursing bed; at the same time, the sliding rail block 27 is fixed on the The sensor is used to monitor the motion information of the slide block 27 and transmit the motion information to the control system. The control system controls the working condition of the self-locking mechanism by controlling the opening and closing of the air cylinder 34 to realize the self-locking function of the nursing bed. The worm 42 drives the second drive shaft 43 to rotate through the worm gear 41, the second drive shaft 43 drives the back lift block 44 to rotate, and the middle back plate 47 is lifted; at the same time, the gear 45 circumferentially fixed on the second drive shaft 43 drives the rack 46 moves up along the middle frame 48, and the rack 46 drives the middle back plate 47 to move up along the middle frame 48 to realize the function of raising the back of the nursing bed. The rotation of the second lead screw 501 drives the second nuts 502 symmetrically arranged on both sides to move in opposite directions, the second nut 502 pushes the fourth link 505 to rotate, and the fourth link 505 drives the left back plate 509 or the right back plate The 510 rotates inward to realize the anti-slip function of the nursing bed.

Claims (10)

1. a novel nursing bed with lifting and lifting functions, comprising a bed body mechanism, a lifting mechanism, a self-locking mechanism, a back lifting mechanism and an anti-side-slip mechanism, characterized in that: the sliding pillars (14) of the bed body mechanism are The inner wall of the external cavity of the bedside frame (11) or the bed end frame (12) slides; the sliding rail block (27) of the lifting mechanism drives the longitudinal rod (16) of the bed body to move through the claws (28); the self-locking mechanism is arranged on the The sensor of the slide rail block (27) controls the opening and closing of the cylinder (34) to realize the unlocking or resetting of the self-locking mechanism; the worm wheel (41) and the worm (42) of the back-lifting mechanism constitute a self-locking mechanism, and the rotation of the gear (45) drives the The middle backboard (47) fixedly connected by the bars (46) moves upward; the second nut (502) of the anti-sideslip mechanism drives the fourth connecting rod (505) to rotate through the first hinge support (507) to realize the left backboard (509) or the right back plate (510) turns inward. 2 . The novel nursing bed with lifting and back lifting functions according to claim 1 , wherein the bed body mechanism comprises a bed head frame ( 11 ), a bed end frame ( 12 ), and a connection box ( 13 ). 3 . , sliding struts (14), bed cross bars (15), bed longitudinal bars (16), the connecting box (13) is fixed to the inner side of the head frame (11) or the bed end frame (12) by bolts, and the sliding struts (14) ) is installed in the outer cavity of the head frame (11) or the end frame (12), and slides along the inner wall of the cavity. It is connected to the sliding strut (14) by means of bolts. 3. A new type of nursing bed with lifting and back lifting functions according to claim 1, wherein the lifting mechanism comprises a first lead screw (21), a smooth rod (22), a first nut (23) ), smooth screw slider (24), first screw fixing seat (25), slide rail (26), sliding rail block (27), clamping jaw (28), the first screw fixing seat (25) through the bolt It is fixed on the inner wall of the slide rail (26), the first lead screw (21) and the smooth lead screw (22) are rotatably matched with the first lead screw fixing seat (25) through the bearing, and the first nut (23) is sleeved on the first lead screw (21), the smooth bar slider (24) is sleeved on the smooth bar (22), and the slide rail block (27) is fixed on the first nut (23) or the upper end face of the smooth bar slider (24) by bolts, and the clamping The claw (28) is connected with the slide rail block (27) through bolts, and the clamping claw (28) is connected with the longitudinal rod (16) of the bed body through bolts. 4. The novel nursing bed with lifting and back lifting functions according to claim 3, characterized in that: two smooth bars (22) are symmetrically arranged on both sides of the first lead screw (21); The rotation of the rod (21) drives the first nut (23) to move along the first lead screw (21), the smooth rod slider (24) slides along the smooth rod (22), and the first nut (23) and the smooth rod slider (24) slide along the smooth rod (22). 24) Drive the slide rail block (27) to slide along the slide rail (26); the upper end of the slide rail (26) is fixed to the lower end surface of the cross beam of the head frame (11) or the bed end frame (12) by bolts; the lower end of the slide rail (26) passes through the The bolt is fixed on the upper end face of the connection box (13); the slide rail block (27) is installed with a sensor to monitor the motion information of the slide rail block (27), and transmit the motion information to the control system, which controls the cylinder (34) to start or closure. 5. The novel nursing bed with lifting and back lifting functions according to claim 1, wherein the self-locking mechanism comprises a first connecting rod (31), a second connecting rod (32), a third connecting rod (32), a connecting rod (33), cylinder (34), first transmission shaft (35), upper pawl (36), lower pawl (37), pawl mounting block (38), ratchet (39), first connecting rod (31) is hinged with the push rod of the cylinder (34), the third connecting rod (33) is hinged with the pawl mounting block (38), the first connecting rod (31) and the third connecting rod (33) are connected with the second connecting rod ( 32) Articulation, the upper pawl (36) and the lower pawl (37) are hinged with the pawl mounting block (38), the ratchet wheel (39) is installed on the first transmission shaft (35) through a key, and the upper pawl (36) And the lower pawl (37) is in contact with the teeth of the ratchet (39). 6. A new type of nursing bed with lifting and back lifting functions according to claim 5, characterized in that: the upper pawl (36), the lower pawl (37) and the ratchet (39) constitute a self-locking mechanism ; The slide block (27) descends, the control system controls the cylinder (34) to start, the cylinder (34) pushes the third connecting rod (33) to move, the upper pawl (36) and the lower pawl (37) and the ratchet (39) The gear teeth are out of contact, and the self-locking mechanism is unlocked; the slide rail block (27) rises or stops moving, the cylinder (34) is reset, the upper pawl (36) and the lower pawl (37) re-contact with the teeth of the ratchet (39), The self-locking mechanism is reset to prevent the reverse rotation of the first lead screw (21) and the first transmission shaft (35), resulting in damage to the motor; the self-locking mechanism is arranged in the cavity of the connection box (13). 7. The novel nursing bed with lifting and back lifting functions according to claim 1, wherein the back lifting mechanism comprises a worm wheel (41), a worm (42), a second transmission shaft (43), The back lift block (44), the gear (45), the rack (46), the middle back plate (47), the middle frame (48), the worm gear (41) is installed on the second transmission shaft (43) through the key, the worm (47) 42) It is connected with the output shaft of the reduction box through the coupling, the back lift block (44) is installed on the second transmission shaft (43) by the key, the back lift block (44) is connected with the middle frame (48) by bolts, and the gear ( 45) is mounted on the second transmission shaft (43) through a key, and the rack (46) is fixed on the lower end face of the middle back plate (47) through bolts. 8. A new type of nursing bed with lifting and lifting functions according to claim 7, characterized in that: the worm gear (41) and the worm (42) constitute a self-locking mechanism to prevent the user from leaning back too strongly , the motor shaft is reversed, causing damage to the motor; the rotation of the second drive shaft (43) drives the back lift block (44) to rotate, and the back lift block (44) drives the middle frame (48) to rotate to realize the middle back plate (47) Reverse; the middle back plate (47) slides up and down along the length direction of the middle frame (48); the gear (45) and the rack (46) form a rack-and-pinion transmission mechanism; the second transmission shaft (43) rotates to drive the gear (45) Rotating, the rack (46) moves up along the middle frame (48), and the rack (46) drives the middle back plate (47) to move up, so as to prevent the back of the user from being squeezed when the back is lifted; the back lifting mechanism is arranged on the middle frame (48) Left and right sides. 9 . The novel nursing bed with lifting and back lifting functions according to claim 1 , wherein the anti-sideslip mechanism comprises a second lead screw (501), a second nut (502), a second Screw fixing seat (503), screw box (504), fourth connecting rod (505), fifth connecting rod (506), first hinge support (507), second hinge support (508), left Back Plate (509), Right Back Plate (510), Left Frame (511), Right Frame (512), Hinge (513), First Sprocket (514), Second Sprocket (515), Chain (516) ), the lead screw box (504) is connected to the middle frame (48) through the fifth connecting rod (506), the second lead screw fixing seat (503) is fixed to the inner wall of the lead screw box (504) by bolts, and the second lead screw ( 501) The bearing is rotatably matched with the second lead screw fixing seat (503), the second nut (502) is sleeved on the second lead screw (501), and the first hinge support (507) is fixed to the second nut by bolts (502) On the upper end surface, the fourth link (505) is hinged with the first hinge support (507), the fourth link (505) is hinged with the second hinge support (508), and the second hinge support (508) The left back plate (509) is fixed to the left frame (511), the right back plate (510) is fixed to the right frame (512), and the left frame (511) and the right frame (512) are connected with the middle frame (48) through the hinge (513), the first sprocket (514) is installed on the second screw (501) through a key, and the second sprocket (515) Mounted on the motor output shaft by a key. 10. A new type of nursing bed with lifting and back lifting functions according to claim 9, characterized in that: the lead screw box (504) is parallel to the middle frame (48), and the distance remains unchanged; the second Both ends of the lead screw (501) are provided with threads, which are trapezoidal threads and have self-locking capability; the threads at both ends of the second lead screw (501) are reversed; the second nut (502) moves along the second lead screw (501). The second nut (502) is symmetrically arranged at both ends of the second lead screw (501); the second lead screw (501) rotates to drive the second nut (502) to move in opposite directions respectively; A hinge support (507) pushes the fourth connecting rod (505) to rotate, and the fourth connecting rod (505) drives the left backboard (509) or the right backboard (510) to rotate inward.

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