CN112353415A

CN112353415A - Ultrasonic department examination bed with freely adjustable length and adjusting method thereof

Info

Publication number: CN112353415A
Application number: CN202011251080.XA
Authority: CN
Inventors: 代慧
Original assignee: Individual
Current assignee: Guangdong Keyouyun Intelligent Household Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-02-12
Anticipated expiration: 2040-11-11
Also published as: CN112353415B

Abstract

The invention belongs to the field of medical instruments, and particularly relates to a length-freely-adjustable ultrasonic department examination bed and an adjusting method thereof, aiming at the problems that the existing ultrasonic department examination bed is fixed in use size, inconvenient for freely adjusting the length of a bed body, poor in universality and not suitable for patients of different body types, the invention provides a scheme that the length-freely-adjustable ultrasonic department examination bed comprises a first bed plate, a second bed plate, a drawing plate, a headrest plate, a base and a connecting column, wherein an auxiliary plate is fixedly arranged on one side of the first bed plate, an auxiliary groove is formed in one side of the second bed plate, the auxiliary plate is slidably arranged in the auxiliary groove, and a fixing groove is formed in one side of the first bed plate close to the second bed plate. The ultrasonic examination bed is convenient to operate, flexible in use size, good in universality and suitable for patients of different body types, and the length of the bed body, the use position of the headrest plate and the use height of the whole body can be freely adjusted.

Description

Ultrasonic department examination bed with freely adjustable length and adjusting method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a length-freely-adjustable ultrasonic examination bed and an adjusting method thereof.

Background

The medical apparatus refers to instruments, equipment, appliances, in-vitro diagnostic reagents, calibrators, materials and other similar or related articles which are directly or indirectly used for a human body, and comprises required computer software, the medical bed is urgently needed by a hospital, a patient needs to be treated on the medical bed no matter in emergency treatment or maintenance, the ultrasonic examination is a diagnostic examination which is commonly used by pregnant women, the pregnant women need to lie on a B ultrasonic bed, and a doctor operates the ultrasonic instrument at one side to examine the pregnant women;

prior patent CN211485463U discloses an examining bed for obstetrics and gynecology department, which realizes the length adjustment according to the pregnant women with different heights by pulling the supporting plate, however, the prior device has at least the following technical problems not solved: 1) the device simply lengthens the examination bed by pulling the supporting plate, but a weighing part is lacked below the lengthening part, so that the device has poor weighing capability and is easy to bend; 2) after the existing examining bed is lengthened, the gravity center of the whole device is changed, at the moment, the pregnant woman can easily topple over the examining bed due to unstable gravity center and serious potential safety hazards are generated by the turning over, sitting up and other movements of the pregnant woman on the examining bed and the operation of lifting bed feet or a headrest plate.

Disclosure of Invention

The invention aims to solve the defects that the ultrasonic department examining bed in the prior art is fixed in use size, inconvenient to freely adjust the length of the bed body, poor in universality and not suitable for patients of different body types, and provides the ultrasonic department examining bed with freely adjustable length and an adjusting method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

an ultrasonic examination bed with freely adjustable length comprises a first bed board, a second bed board, a drawing board, a headrest board, a base and a connecting column, wherein an auxiliary board is fixedly arranged on one side of the first bed board, an auxiliary groove is formed in one side of the second bed board, the auxiliary board is slidably arranged in the auxiliary groove, a fixed groove is formed in one side of the first bed board close to the second bed board, the drawing board is fixedly arranged on one side of the second bed board, the drawing board is slidably arranged in the fixed groove, the headrest board is arranged on one side of the first bed board, a mounting groove is formed in one side of the headrest board close to the first bed board, a connecting board is fixedly arranged on one side of the first bed board close to the headrest board, the connecting board is slidably arranged in the mounting groove, the base and the connecting column are respectively and fixedly arranged at the bottoms of the first bed board and the second bed board, a movable, the movable column is slidably mounted in the groove, the connecting column is provided with an adjusting mechanism, the adjusting mechanism is matched with the movable column, the other side of the base is provided with a movable groove, a movable plate is slidably mounted in the movable groove, the bottom of the headrest plate is fixedly provided with a supporting seat, one end of the movable plate is fixedly connected to one side of the supporting seat, one side of the movable plate is fixedly provided with a rack, the inner wall of the bottom of the movable groove is provided with a round hole, a round rod is rotatably mounted in the round hole, one end of the round rod is fixedly provided with a gear, the gear is meshed with the rack, the other end of the round rod is fixedly provided with a turntable, the top of the turntable is provided with a control groove, an inserting block is slidably mounted in the control groove, the bottom of the base is provided with a plurality of inserting grooves, the inserting block is mounted, the first screw rod is connected with a nut in a threaded mode, and the nut is rotatably installed at the bottom of the base.

Preferably, adjustment mechanism includes first lead screw, two fixture blocks, connecting strip, second lead screw and rotates the wheel, and first thread groove has been seted up to the one end of removal post, and first lead screw threaded connection has seted up the rotation hole on the inner wall of one side of recess in first thread groove, and first lead screw rotates to be installed in rotating the downthehole, and the one end fixed mounting of first lead screw has the rotation seat, rotates one side of seat and has seted up two standing grooves, fixture block slidable mounting in the standing groove that corresponds.

Preferably, a plurality of draw-in grooves have been seted up to the one end of spliced pole, and the fixture block is installed in the draw-in groove that corresponds, has seted up same fixed orifices on one side inner wall of two standing grooves, and connecting strip slidable mounting is in the fixed orifices, and the both ends of connecting strip are fixed connection respectively on two fixture blocks.

Preferably, one side of the connecting strip is provided with a threaded hole, the inner wall of one side of the fixing hole is provided with a control hole, the second screw rod is rotatably installed in the control hole and is in threaded connection with the threaded hole, and one end of the second screw rod is fixedly connected to the rotating wheel.

Preferably, the equal fixed mounting in bottom of supporting seat, base and spliced pole has the connecting seat, and the bottom of three connecting seat all is equipped with the regulation post, and the adjustment tank has all been seted up at the top of three regulation post, and connecting seat slidable mounting all installs two universal wheels in the adjustment tank that corresponds, the bottom of three regulation post.

Preferably, a plurality of locked grooves have been seted up to one side of connecting seat, have seted up square groove on one side inner wall of adjustment tank, and slidable mounting has the locking piece in square groove, and the locking piece is installed in the locked groove, and the second thread groove has been seted up to one side of locking piece, has seted up the connecting hole on one side inner wall of square groove, and the second screw rod is installed to the connecting hole internal rotation.

Preferably, second screw rod threaded connection is in the second thread groove, and the sliding sleeve is equipped with the control wheel on the second screw rod, and the cover is equipped with the spring on the second screw rod, and one side fixed mounting of control wheel has the stopper, and a plurality of spacing grooves have been seted up to one side of adjusting the post, and the stopper is installed at the spacing inslot.

The invention also provides an adjusting method of the ultrasonic department examining table with the freely adjustable length, which comprises the following steps:

s1: firstly, rotating a rotating wheel, wherein the rotating wheel drives a second screw rod to rotate, the second screw rod drives a connecting strip to move, so that the connecting strip drives two clamping blocks to move, the clamping blocks slide out of corresponding clamping grooves, the fixed limit of a rotating seat can be cancelled, then, the rotating seat is rotated, so that the rotating seat drives a first screw rod to rotate, the first screw rod drives a moving column to move, the moving column drives a base to move, the base drives a first bed board to move, the use lengths of the first bed board and the second bed board can be adjusted, meanwhile, a drawing plate slides in a fixed groove, and an auxiliary plate slides in an auxiliary groove;

s2: the nut is rotated to drive the first screw to move, the first screw drives the insert block to move, the insert block slides out of the slot, the rotation limit of the gear can be cancelled, the headrest plate is moved to drive the support seat to move, the support seat drives the movable plate to move, the movable plate can drive the gear to rotate, and the use size of the headrest plate can be adjusted;

s3: the reverse rotation nut can drive the inserted block and insert in another slot, the pulling control wheel, and control wheel extrusion spring, control wheel drive stopper roll-off spacing groove, can cancel the fixed restriction of control wheel, rotate the control wheel for the control wheel drives the second screw rod and rotates, and the second screw rod drives the locking piece and removes, and locking piece roll-off locked groove can cancel the fixed restriction of connecting seat, can adjust the height of first bed board, second bed board and headrest board.

Compared with the prior art, the invention has the beneficial effects that:

1) according to the invention, through the matching of the first bed board, the second bed board, the auxiliary plate, the pull board, the connecting board, the moving board and the like, the bed boards and the connecting board are still mutually supported after the length of the examining bed is increased, the bearing capacity is good, and the danger caused by the hanging of the examining bed after the length of the examining bed is increased in the prior art without support is avoided.

2) The connecting seats are fixedly arranged at the bottoms of the supporting seat, the base and the connecting column, the adjusting columns are arranged at the bottoms of the three connecting seats, and the universal wheels are arranged at the bottoms of the three adjusting columns, so that when the length of the examination bed is increased, the positions of the longitudinal supporting points are correspondingly changed, the gravity center of the examination bed after being lengthened is stable, and the phenomenon that the examination bed is dangerous to overturn due to unstable gravity center after being lengthened in the prior art is avoided.

Drawings

FIG. 1 is a schematic perspective view of a length-adjustable ultrasound examination bed according to the present invention;

FIG. 2 is a schematic front view of an ultrasonic examination bed with freely adjustable length according to the present invention;

FIG. 3 is a schematic structural view of part A of a freely adjustable length ultrasound examination bed according to the present invention;

FIG. 4 is a schematic structural view of part B of a freely adjustable length ultrasound examination bed according to the present invention;

fig. 5 is a schematic structural diagram of part C of an ultrasound examination bed with freely adjustable length according to the present invention.

In the figure: 1. a first bed plate; 2. a second bed board; 3. an auxiliary plate; 4. fixing grooves; 5. a drawing plate; 6. a headrest plate; 7. a connecting plate; 8. a base; 9. connecting columns; 10. moving the column; 11. a first lead screw; 12. a rotating seat; 13. a clamping block; 14. a card slot; 15. a connecting strip; 16. a second lead screw; 17. a rotating wheel; 18. a moving groove; 19. moving the plate; 20. a gear; 21. a round bar; 22. a turntable; 23. a slot; 24. inserting a block; 25. a first screw; 26. a nut; 27. a supporting seat; 28. an adjustment column; 29. a connecting seat; 30. a second screw; 31. a control wheel; 32. a spring; 33. a limiting block; 34. locking the groove; 35. and (6) locking the block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this patent does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

Referring to fig. 1-5, an ultrasonic examination bed with freely adjustable length comprises a first bed board 1, a second bed board 2, a drawing board 5, a headrest board 6, a base 8 and a connecting column 9, wherein an auxiliary board 3 is fixedly installed on one side of the first bed board 1, an auxiliary groove is formed on one side of the second bed board 2, the auxiliary board 3 is slidably installed in the auxiliary groove, a fixing groove is formed on one side of the first bed board 1 close to the second bed board 2, the drawing board 5 is fixedly installed on one side of the second bed board 2, the drawing board 5 is slidably installed in the fixing groove 4, the headrest board 6 is positioned on one side of the first bed board 1, a mounting groove is formed on one side of the headrest board 6 close to the first bed board 1, a connecting board 7 is fixedly installed on one side of the first bed board 1 close to the headrest board 6, the connecting board 7 is slidably installed in the mounting groove, the base 8 and the connecting column 9 are respectively fixedly, one side of the base 8 is fixedly provided with a movable column 10, one end of the connecting column 9 is provided with a groove, the movable column 10 is slidably arranged in the groove, the connecting column 9 is provided with an adjusting mechanism, the adjusting mechanism is matched with the movable column 10, the other side of the base 8 is provided with a movable groove 18, a movable plate 19 is slidably arranged in the movable groove 18, the bottom of the headrest plate 6 is fixedly provided with a supporting seat 27, one end of the movable plate 19 is fixedly connected with one side of the supporting seat 27, one side of the movable plate 19 is fixedly provided with a rack, the inner wall of the bottom of the movable groove 18 is provided with a round hole, a round rod 21 is rotatably arranged in the round hole, one end of the round rod 21 is fixedly provided with a gear 20, the gear 20 is meshed with the rack, the other end of the round rod is fixedly provided with a turntable 22, the insert block 24 is installed in the slot 23, a first screw rod 25 is fixedly installed at the bottom of the insert block 24, a through hole is formed in the inner wall of the bottom of the control groove, the first screw rod 25 is slidably installed in the through hole, a nut 26 is connected to the first screw rod 25 through threads, and the nut 26 is rotatably installed at the bottom of the base 8.

In this embodiment, adjustment mechanism includes first lead screw 11, two fixture blocks 13, connecting strip 15, second lead screw 16 and rotating wheel 17, first thread groove has been seted up to the one end of removal post 10, first lead screw 11 threaded connection is in first thread groove, the rotation hole has been seted up on one side inner wall of recess, first lead screw 11 rotates and installs at rotating downtheholely, the one end fixed mounting of first lead screw 11 has rotating seat 12, two standing grooves have been seted up to one side of rotating seat 12, fixture block 13 slidable mounting is in the standing groove that corresponds, rotating seat 12 drives first lead screw 11 and rotates, first lead screw 11 drives removal post 10 and removes, make removal post 10 drive base 8 and remove.

In this embodiment, a plurality of draw-in grooves 14 have been seted up to spliced pole 9's one end, and fixture block 13 is installed in corresponding draw-in groove 14, has seted up same fixed orifices on one side inner wall of two standing grooves, and connecting strip 15 slidable mounting is in the fixed orifices, and the both ends of connecting strip 15 fixed connection respectively are on two fixture blocks 13, and connecting strip 15 drives two fixture blocks 13 and removes, and the fixture block 13 roll-off corresponds draw-in groove 14, just can cancel the fixed restriction of rotating seat 12.

In this embodiment, a threaded hole is formed in one side of the connecting strip 15, a control hole is formed in the inner wall of one side of the fixing hole, the second lead screw 16 is rotatably installed in the control hole, the second lead screw 16 is in threaded connection with the threaded hole, one end of the second lead screw 16 is fixedly connected to the rotating wheel 17, the rotating wheel 17 drives the second lead screw 16 to rotate, and the second lead screw 16 drives the connecting strip 15 to move.

In this embodiment, the equal fixed mounting in bottom of supporting seat 27, base 8 and spliced pole 9 has connecting seat 29, and the bottom of three connecting seat 29 all is equipped with adjusts post 28, and the adjustment tank has all been seted up at the top of three regulation post 28, and connecting seat 29 slidable mounting is in the adjustment tank that corresponds, and two universal wheels are all installed to the bottom of three regulation post 28, the universal wheel all sets up by the locking component, avoids skidding.

In this embodiment, a plurality of locked grooves 34 have been seted up to one side of connecting seat 29, has seted up square groove on one side inner wall of adjustment tank, and slidable mounting has locking piece 35 in square groove, and locking piece 35 installs in locked groove 34, and the second thread groove has been seted up to one side of locking piece 35, has seted up the connecting hole on one side inner wall of square groove, and second screw rod 30 is installed to the connecting hole internal rotation.

In this embodiment, second screw rod 30 threaded connection is in the second thread groove, and the cover is equipped with control wheel 31 on second screw rod 30, and the cover is equipped with spring 32 on the second screw rod 30, and one side fixed mounting of control wheel 31 has stopper 33, and a plurality of spacing grooves have been seted up to one side of adjusting post 28, and stopper 33 is installed at the spacing inslot.

The embodiment also provides an adjusting method of the ultrasonic department examining table with the freely adjustable length, which comprises the following steps:

s1: firstly, rotating a rotating wheel 17, wherein the rotating wheel 17 drives a second screw rod 16 to rotate, the second screw rod 16 drives a connecting strip 15 to move, so that the connecting strip 15 drives two clamping blocks 13 to move, the clamping blocks 13 slide out of corresponding clamping grooves 14, the fixing limit of a rotating seat 12 can be cancelled, then, the rotating seat 12 is rotated, so that the rotating seat 12 drives a first screw rod 11 to rotate, the first screw rod 11 drives a moving column 10 to move, the moving column 10 drives a base 8 to move, the base 8 drives a first bed board 1 to move, a pull plate 5 slides in a fixing groove 4, an auxiliary plate 3 slides in an auxiliary groove, and the use lengths of the first bed board 1 and the second bed board 2 can be adjusted;

s2: the nut 26 is rotated, the nut 26 drives the first screw rod 25 to move, the first screw rod 25 drives the insert block 24 to move, the insert block 24 slides out of the slot 23, the rotation limitation of the gear 20 can be cancelled, the headrest plate 6 is moved, the headrest plate 6 drives the supporting seat 27 to move, the supporting seat 27 drives the moving plate 19 to move, the moving plate 19 can drive the gear 20 to rotate, the use size of the headrest plate 6 can be adjusted, and the length of the examination bed can be integrally adjusted;

s3: the nut 26 is rotated reversely, the insert block 24 can be driven to be inserted into another slot 23, the length of the examination bed is fixed, the control wheel 31 is pulled, the control wheel 31 extrudes the spring 32, the control wheel 31 drives the limit block 33 to slide out of the limit groove, the fixed limit of the control wheel 31 can be cancelled, the control wheel 31 is rotated, the control wheel 31 drives the second screw rod 30 to rotate, the second screw rod 30 drives the lock block 35 to move, the lock block 35 slides out of the lock groove 34, the fixed limit of the connecting seat 29 can be cancelled, and the height of the first bed plate 1, the height of the second bed plate 2 and the height of the headrest plate 6 can be adjusted.

Compared with the prior art, the invention has the technical progress that: the ultrasonic examination bed is convenient to operate, flexible in use size, good in universality and suitable for patients of different body types, and the length of the bed body, the use position of the headrest plate 6 and the use height of the whole body can be freely adjusted.

Claims

1. An ultrasonic examination bed with freely adjustable length comprises a first bed board (1), a second bed board (2), a drawing board (5), a headrest board (6), a base (8) and a connecting column (9), and is characterized in that an auxiliary board (3) is fixedly arranged on one side of the first bed board (1), an auxiliary groove is formed in one side of the second bed board (2), the auxiliary board (3) is slidably arranged in the auxiliary groove, a fixing groove is formed in one side, close to the second bed board (2), of the first bed board (1), the drawing board (5) is fixedly arranged on one side of the second bed board (2), the drawing board (5) is slidably arranged in the fixing groove (4), the headrest board (6) is positioned on one side of the first bed board (1), a mounting groove is formed in one side, close to the first bed board (1), a connecting board (7) is fixedly arranged on one side, close to the headrest board (6), of the first bed board (1), connecting plate (7) slidable mounting is in the mounting groove, and base (8) and spliced pole (9) are fixed mounting respectively in the bottom of first bed board (1) and second bed board (2), one side fixed mounting of base (8) has removal post (10), and the one end of spliced pole (9) is seted up flutedly, and removal post (10) slidable mounting is in the recess, is equipped with adjustment mechanism on spliced pole (9), and adjustment mechanism and removal post (10) looks adaptation, the opposite side of base (8) has been seted up and has been removed groove (18), and slidable mounting has movable plate (19) in removal groove (18), and the bottom fixed mounting of headrest board (6) has supporting seat (27), the one end fixed connection of movable plate (19) is in one side of supporting seat (27), and one side fixed mounting of movable plate (19) has the rack, has seted up the round hole on the bottom inner wall of removal groove (18, round bar (21) are installed to the round hole internal rotation, the one end fixed mounting of round bar (21) has gear (20), gear (20) and rack toothing, the other end fixed mounting of round bar has carousel (22), the control flume has been seted up at the top of carousel (22), slidable mounting has inserted block (24) in the control flume, a plurality of slots (23) have been seted up to the bottom of base (8), inserted block (24) are installed in slot (23), the bottom fixed mounting of inserted block (24) has first screw rod (25), the through-hole has been seted up on the bottom inner wall of control flume, first screw rod (25) slidable mounting is in the through-hole, threaded connection has nut (26) on first screw rod (25), nut (26) rotate the bottom of installing in base (8).

2. The ultrasonic examination bed with freely adjustable length as claimed in claim 1, wherein the adjusting mechanism comprises a first screw rod (11), two clamping blocks (13), a connecting bar (15), a second screw rod (16) and a rotating wheel (17), a first thread groove is formed in one end of the moving column (10), the first screw rod (11) is in threaded connection with the first thread groove, a rotating hole is formed in the inner wall of one side of the groove, the first screw rod (11) is rotatably installed in the rotating hole, a rotating seat (12) is fixedly installed at one end of the first screw rod (11), two placing grooves are formed in one side of the rotating seat (12), and the clamping blocks (13) are slidably installed in the corresponding placing grooves.

3. The ultrasonic examination bed with freely adjustable length as claimed in claim 2, wherein one end of the connecting column (9) is provided with a plurality of clamping grooves (14), the clamping blocks (13) are installed in the corresponding clamping grooves (14), one inner wall of one side of each of the two placing grooves is provided with the same fixing hole, the connecting strip (15) is slidably installed in the fixing holes, and two ends of the connecting strip (15) are respectively and fixedly connected to the two clamping blocks (13).

4. The ultrasonic examination bed with freely adjustable length as claimed in claim 3, wherein one side of the connecting bar (15) is provided with a threaded hole, one side of the inner wall of the fixing hole is provided with a control hole, the second screw rod (16) is rotatably installed in the control hole, the second screw rod (16) is in threaded connection with the threaded hole, and one end of the second screw rod (16) is fixedly connected to the rotating wheel (17).

5. The ultrasonic examination bed with freely adjustable length as claimed in claim 1, wherein the bottom of each of the support base (27), the base (8) and the connecting column (9) is fixedly provided with a connecting base (29), the bottom of each of the three connecting bases (29) is provided with an adjusting column (28), the top of each of the three adjusting columns (28) is provided with an adjusting groove, the connecting bases (29) are slidably mounted in the corresponding adjusting grooves, and the bottom ends of the three adjusting columns (28) are provided with two universal wheels.

6. The ultrasonic examination bed with freely adjustable length as claimed in claim 5, wherein a plurality of locking grooves (34) are formed in one side of the connecting seat (29), a square groove is formed in an inner wall of one side of the adjusting groove, a locking block (35) is slidably mounted in the square groove, the locking block (35) is mounted in the locking groove (34), a second threaded groove is formed in one side of the locking block (35), a connecting hole is formed in an inner wall of one side of the square groove, and a second screw (30) is rotatably mounted in the connecting hole.

7. The ultrasonic examination bed with freely adjustable length as claimed in claim 6, wherein the second screw (30) is in threaded connection with the second thread groove, the second screw (30) is slidably sleeved with a control wheel (31), the second screw (30) is sleeved with a spring (32), a limit block (33) is fixedly installed on one side of the control wheel (31), a plurality of limit grooves are formed in one side of the adjusting column (28), and the limit block (33) is installed in the limit grooves.

8. An adjusting method of an ultrasonic department examining table with freely adjustable length is characterized by comprising the following steps:

s1: firstly, a rotating wheel (17) is rotated, the rotating wheel (17) drives a second screw rod (16) to rotate, the second screw rod (16) drives a connecting strip (15) to move, the connecting strip (15) drives two clamping blocks (13) to move, the clamping blocks (13) slide out of corresponding clamping grooves (14), the fixed limit of a rotating seat (12) can be cancelled, then the rotating seat (12) is rotated, the rotating seat (12) drives a first screw rod (11) to rotate, the first screw rod (11) drives a moving column (10) to move, the moving column (10) drives a base (8) to move, the base (8) drives a first bed board (1) to move, the use lengths of the first bed board (1) and the second bed board (2) can be adjusted, meanwhile, a drawing plate (5) slides in a fixed groove (4), and an auxiliary plate (3) slides in an auxiliary groove;

s2: the nut (26) is rotated, the nut (26) drives the first screw rod (25) to move, the first screw rod (25) drives the insert block (24) to move, the insert block (24) slides out of the slot (23), so that the rotation limitation of the gear (20) can be cancelled, the headrest plate (6) is moved, the headrest plate (6) drives the supporting seat (27) to move, the supporting seat (27) drives the moving plate (19) to move, the moving plate (19) can drive the gear (20) to rotate, and the use size of the headrest plate (6) can be adjusted;

s3: reverse rotation nut (26), can drive inserted block (24) and insert in another slot (23), pulling control wheel (31), control wheel (31) extrusion spring (32), control wheel (31) drive stopper (33) roll-off spacing groove, the fixed restriction of control wheel (31) can be cancelled, rotate control wheel (31), make control wheel (31) drive second screw rod (30) and rotate, second screw rod (30) drive locking piece (35) and remove, locking piece (35) roll-off locked groove (34), can cancel the fixed restriction of connecting seat (29), can adjust the height of first bed board (1), second bed board (2) and headrest board (6).