CN108378993B

CN108378993B - Falling prevention bed for orthopedic operation

Info

Publication number: CN108378993B
Application number: CN201810142753.4A
Authority: CN
Inventors: 毛佳
Original assignee: Yongchuan Hospital of Chongqing Medical University
Current assignee: Yongchuan Hospital of Chongqing Medical University
Priority date: 2018-02-11
Filing date: 2018-02-11
Publication date: 2020-04-03
Anticipated expiration: 2038-02-11
Also published as: CN108378993A

Abstract

The invention belongs to the technical field of medical equipment, and mainly relates to an orthopedic operation anti-falling bed which comprises a bed body, a first bed plate and a second bed plate, wherein the bed body comprises a bed body frame with a groove, a support plate and a support, the support is arranged on the support plate, the support plate is detachably connected with the bottom of the bed body frame, the two side groove walls of the bed body frame are provided with limiting plates, the inner walls of the two sides of the bed body frame are provided with a first connecting groove and a second connecting groove, the middle part of one end of the bed tail of the bed body frame is provided with a shaft hole, the middle part of the bottom of the bed body frame is provided with a support column, the top end of the support column is provided with a shaft hole, the bottom end of the first bed plate is provided with a support column mounting groove, the support column mounting groove is sleeved on the support column, the two sides of the first, the bed can effectively protect the patient to prevent the patient from falling down, so that the patient is effectively prevented from being injured by collision, and meanwhile, the manufacturing cost is low, and the popularization is facilitated.

Description

Falling prevention bed for orthopedic operation

Technical Field

The invention belongs to the technical field of medical equipment, and particularly relates to an orthopedic operation anti-falling bed.

Background

The hospital bed can also be called a medical bed, a nursing bed and the like, is used when patients are in rest, and is mainly used in various hospitals, health hospitals, community health service centers and the like.

Sickbeds are classified into ABS sickbeds, all-stainless steel sickbeds, semi-stainless steel sickbeds, all-steel plastic-sprayed sickbeds and the like according to the material. The hospital beds can be classified into medical hospital beds and household hospital beds according to purposes. Sickbeds are classified into electric sickbeds and manual sickbeds according to functions, wherein the electric sickbeds can be classified into five-function electric sickbeds, three-function electric sickbeds and the like, and the manual sickbeds can be classified into double-rocking sickbeds, single-rocking sickbeds and flat-plate sickbeds.

For patients waiting for treatment or receiving treatment in hospital departments, hospital beds are the main activity places of the patients, and hospital management parties and patient families hope that the patients can lie stably on the hospital beds for rest or receive treatment, so that the patients can normally live through a treatment period and a rehabilitation period on the hospital beds to wait for the arrival of treatment ending dates.

For example, after the orthopedic surgery, a patient needs to lie in bed for a long time to rest, if the patient falls from a sickbed carelessly, the injury to the patient cannot be measured, the condition of the patient is aggravated, the secondary injury occurs at the bone surgery part, and the operation needs to be performed again; it is also possible that some patients fall under the bed during observation, while in case of a fall they are physically carrying a medical device, such as a breathing mask, etc., and if they fall they are likely to be in an extremely dangerous situation because the medical device falls off.

Generally, a patient can have a rest or receive treatment safely on a hospital bed, on one hand, medical staff can carry out medical work uninterruptedly, or family members of the patient can take care of the patient for a long time, even at night, special nursing staff can be arranged to take care of the patient, unattended time of the patient is shortened, on the other hand, some patients have certain mobility, self-regulation is carried out on the patients, and probability of falling from the bed is reduced. However, medical staff, patient family members and even paid nursing staff are not only manually nursed but also have the time of eating and resting, and the patients cannot be cared for 24 hours without interruption, so that the patients still have certain unattended time, and some patients have complete incapacity of moving, and the patients are likely to have a fall-off event due to an unintentional turn-over.

In order to avoid the occurrence of a patient falling from the bed, in the prior art, a hospital management party also takes a lot of active measures, for example, a border-crossing alarm device and an emergency call device are arranged on a bed body of a hospital bed to reduce the possibility of falling from the bed of the patient, a triggering device, a sensing device, a judging device, a protecting device and the like for falling from the bed and alarming are arranged on the bed body, and the occurrence of the patient falling from the bed is reduced to a certain extent by the modified hospital bed device. Meanwhile, the hospital management side also takes measures, such as increasing interaction and communication with the family members of the patients, so as to reduce the time that the patients are unattended.

However, the transformation mechanism of the existing sickbed bodies is too complex, because the patient falls down to the bed and the interval is short, the sensing device judging device can hardly make judgment in a very short time and control the protection device to protect the patient, and most importantly, the bed body provided with the sensing device, the judging device and the protection device is complex in structure and extremely high in cost.

Therefore, a new technical scheme for preventing falling of hospital bed is needed, which can effectively protect patients and is convenient for popularization with low manufacturing cost, so as to effectively avoid the patients from being injured by collision.

Disclosure of Invention

Based on the problems mentioned in the background art, the invention provides an orthopedic operation anti-falling bed which can effectively protect a patient from falling down so as to effectively prevent the patient from being injured by impact, and has low manufacturing cost and convenient popularization.

The technical scheme adopted by the invention is as follows:

an orthopedic operation anti-falling bed comprises a bed body, a first bed plate and a second bed plate, wherein the bed body comprises a bed body frame with a groove, a support plate and a support, the support is arranged on the support plate, the support plate is detachably connected with the bottom of the bed body frame, the bed body frame is provided with a limiting plate on two side groove walls, the inner walls of two sides of the bed body frame are provided with a first connecting groove and a second connecting groove, the middle part of one end of a bed tail of the bed body frame is provided with a shaft hole, the middle part of the bottom of the bed body frame is provided with a support column, the top end of the support column is provided with a shaft hole, the bottom end of the first bed plate is provided with a support column mounting groove, the support column mounting groove is sleeved on the support column, two sides of the first bed plate are provided with first connecting plates corresponding to the position of the first connecting groove, a keel shaft is arranged in the shaft hole of the first bed, the second bed board is slidably clamped on one side of the first bed board in the bed body frame, the two sides of the second bed board are provided with second connecting plates corresponding to the positions of the second connecting grooves, the top end of the bed body frame is provided with a first mounting groove on the two sides of the first bed board and a second mounting groove on the two sides of the second bed board, a plurality of supporting springs are uniformly arranged among the first bed board, the second bed board and the bottom of the bed body frame groove, a transmission mechanism is arranged in the first mounting groove and comprises a first lever, a first gear, a second gear and a jacking piece, the first lever comprises a left rod body, a right rod body and a first hinge ring, the left rod body and the right rod body are positioned on the two sides of the first hinge ring and are integrally formed with the first hinge ring, the left end of the left rod body is integrally formed with an arc-shaped toothed plate, the arc-shaped toothed plate is meshed with the first gear, one side of the first gear, the second gear is meshed with the jacking piece, and the top end of the jacking piece is movably arranged in the first mounting groove in a penetrating mode and provided with a guardrail.

Further, a second hinge column is arranged on the right side of the second connecting groove in the second mounting groove, a traction mechanism is arranged in the second mounting groove and comprises a second hinge ring, a pressing plate and a traction plate, the second hinge ring, the pressing plate and the traction plate are integrally formed and are located between the second hinge ring and the pressing plate, the second hinge ring is sleeved on the second hinge column, the pressing plate is located at the bottom end of the second connecting plate, a rope hole is formed in the bed frame between the second mounting groove and the second mounting groove, a traction rope is fixedly connected to the free end of the traction plate and penetrates through the rope hole, the jacking piece comprises a U-shaped toothed plate groove with a closed bottom end, a straight toothed plate is arranged in the U-shaped toothed plate groove, a limiting bulge is arranged on the side wall of the straight toothed plate, a limiting groove matched with the limiting bulge is arranged on the inner wall of the U-shaped toothed plate groove, and sliding blocks are arranged on, the utility model discloses a horizontal bed board, including first mounting groove, slider sliding card, U-shaped pinion rack groove outer wall, haulage rope free end and slider, first mounting groove inner wall seted up with slider assorted movable groove, the slider sliding card is located the movable groove, second gear one end is kept away from to U-shaped pinion rack groove outer wall is installed spacing spring, the haulage rope free end is connected with the slider, the spur-teeth plate is in the separation state with the second gear during spacing spring free state, second bed board top level is greater than the level on first bed board top.

Furthermore, the distance between the top end of the limiting plate and the top end of the bed body frame is 6-12 mm, and the ratio of the distance between one end of the first connecting groove close to the first hinge ring and the circle center of the first hinge ring to the distance between the free end of the left rod body and the circle center of the first hinge ring is 1: 10.

Furthermore, the top end of the support column is of a round angle structure.

Further, the guardrail includes integrated into one piece's guardrail pole, the spacing post of guardrail, guardrail support column and guardrail backup pad, the spacing post of guardrail is located guardrail pole bottom both ends, bed body frame in first mounting groove outside seted up with the spacing post assorted spacing hole of guardrail, the guardrail support column is located between the spacing post of two guardrails, the backup pad is connected with the support column bottom, the backup pad is located second gear top, bed body frame top seted up with guardrail pole assorted railing groove.

Further, the ratio of the length dimension of the first bed board to the second bed board is 3: 1.

Further, the total spring force of the supporting springs between the second bed board and the bed body frame is 46-98 newtons.

Further, first gear and second gear are plastic construction, arc pinion rack and spur rack are metal construction.

Further, a reinforcing rib is welded between the arc toothed plate and the left rod body.

The invention has the following beneficial effects:

1. the middle part of the first bed board is provided with a keel shaft, the bottom of the first bed board is provided with a plurality of supporting springs, the first bed board is connected with the guardrail through a transmission mechanism, the balance of the first bed board is broken when a human body moves on the first bed board, the first bed board deflects along the rolling side of the human body, and the first bed board drives the guardrail to ascend through the transmission mechanism during deflection, so that the bed is protected against falling;

2. second bed board activity card is established on the bed body frame, second bed board level is greater than the level of first bed board and passes through drive mechanism, the haulage rope is connected with the jacking piece, be equipped with spacing spring and spacing spring jacking piece and second gear in the separation state when free state on the jacking piece, accessible drive mechanism and haulage rope pulling jacking piece in the meshing of second gear when the second bed board is forced to move down, first bed board skew can make the guardrail rise, jacking piece loses the haulage rope pulling force and separates with the second gear when the second bed board return, will not lead to the guardrail to rise when first bed board rotates again, it causes the human activity to avoid the inconvenient back guardrail of human body to rise.

Drawings

The invention can be further illustrated by the non-limiting examples given in the accompanying drawings:

FIG. 1 is a schematic structural view of an embodiment of the fall-preventing bed for orthopedic surgery of the invention;

FIG. 2 is a first schematic view of the longitudinal cross-sectional structure of FIG. 1;

FIG. 3 is a schematic structural view of a bed frame in an embodiment of the fall-preventing bed for orthopedic surgery of the invention;

FIG. 4 is a schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic view of the structure at B in FIG. 3;

FIG. 6 is a second schematic diagram of the longitudinal cross-sectional structure of FIG. 1;

FIG. 7 is a schematic view of the structure at C in FIG. 6;

FIG. 8 is a schematic view of the structure of FIG. 6 at D;

FIG. 9 is a schematic view of the structure at E in FIG. 7;

FIG. 10 is a schematic view of a jacking member of an embodiment of the fall arrest bed for orthopedic surgery of the present invention;

FIG. 11 is a schematic structural view of a guardrail in an embodiment of the fall-preventing bed for orthopedic surgery according to the invention;

FIG. 12 is a schematic view of a partial structure of a bed frame in an embodiment of the fall-preventing bed for orthopedic surgery according to the present invention;

the main element symbols are as follows:

the bed body 1, the bed body frame 11, the support plate 12, the support 13, the first connecting groove 141, the second connecting groove 142, the movable groove 143, the rail groove 15, the first mounting groove 161, the second mounting groove 162, the shaft hole 17, the limiting plate 18, the support column 19, the shaft groove 191, the first bed plate 21, the first connecting plate 211, the support column mounting groove 212, the second bed plate 22, the second connecting plate 221, the pressing plate 231, the second hinge ring 232, the traction plate 233, the second hinge column 234, the guardrail 3, the guardrail limiting column 31, the guardrail supporting column 32, the guardrail supporting plate 33, the rail 34, the supporting spring 4, the first hinge ring 51, the left rod body 52, the right rod body 53, the arc toothed plate 54, the first gear 55, the second gear 56, the U-shaped toothed plate groove 57, the sliding block 571, the straight toothed plate 58, the limiting protrusion 581, and the limiting spring 59.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

Example (b):

as shown in fig. 1 to 12, an orthopedic operation anti-falling bed comprises a bed body 1, a first bed plate 21 and a second bed plate 22, the bed body 1 comprises a bed body frame 11 with a groove, a support plate 12 and a support 13, the support 13 is mounted on the support plate 12, the support plate 12 is detachably connected with the bottom of the bed body frame 11, the bed body frame 11 is provided with a limiting plate 18 on two side walls, the bed body frame 11 is provided with a first connecting groove 141 and a second connecting groove 142 on two side walls, the bed body frame 11 is provided with a shaft hole 17 in the middle of one end of a bed tail, a support column 19 is provided in the middle of the bottom of the bed body frame 11, the top end of the support column 19 is provided with a shaft groove 191, the middle of the first bed plate 21 is also provided with a shaft hole 17, the bottom end is provided with a support column mounting groove 212, the support column mounting groove 212 is sleeved on the support column 19, two sides of, the two ends of the keel shaft are respectively arranged in the shaft hole 17 on the bed body frame 11 and the shaft groove 191 of the support column 19 in a penetrating manner, the second bed plate 22 is arranged at one side of the first bed plate 21 in the bed body frame 11 in a sliding and clamping manner, the positions of the two sides of the second bed plate 22 corresponding to the second connecting grooves 142 are provided with second connecting plates 221, the top end of the bed body frame 11 is provided with first mounting grooves 161 at the two sides of the first bed plate 21 and second mounting grooves 162 at the two sides of the second bed plate 22, and a plurality of support springs 4 are uniformly arranged among the first bed plate 21, the second bed plate 22 and the bottom of the bed body frame 11. according to the structural design, the first bed plate 21 is kept horizontal under the action of the support springs 4, and when a human body lies on the first bed plate 21, the; the first installation groove 161 is internally provided with a transmission mechanism, the transmission mechanism comprises a first lever, a first gear 55, a second gear 56 and a jacking piece, the first lever comprises a left rod body 52, a right rod body 53 and a first hinge ring 51, the left rod body 52 and the right rod body 53 are positioned at two sides of the first hinge ring 51 and are integrally formed with the first hinge ring 51, the left end of the left rod body 52 is integrally formed and connected with an arc-shaped toothed plate 54, the arc-shaped toothed plate 54 is meshed with the first gear 55, one side of the first gear 55, far away from the arc-shaped toothed plate 54, is meshed with the second gear 56, the second gear 56 is meshed with the jacking piece, the top end of the jacking piece is movably penetrated with a guardrail 3 in the first installation groove 161, through the structural design, when the first bed board 21 deflects, the first connection plate 211 presses the right rod body 53 to lift the free end of the left rod body 52, when the left rod body 52 lifts, the arc-shaped toothed plate 54 drives the first gear 55 to rotate, when the second gear 56 rotates, the lifting piece is driven to lift up to lift out the guardrail 3.

Preferably, a second hinge column 234 is arranged on the right side of the second connecting groove 142 in the second mounting groove 162, a traction mechanism is arranged in the second mounting groove 162, the traction mechanism includes a second hinge ring 232, a pressing plate 231 and a traction plate 233, the second hinge ring 232, the pressing plate 231 and the traction plate 233 are integrally formed and located therebetween, the second hinge ring 232 is sleeved on the second hinge column 234, the pressing plate 231 is located at the bottom end of the second connecting plate 221, a rope hole is formed between the bed frame 11 and the second mounting groove 161, a traction rope is fixedly connected to the free end of the traction plate 233, the traction rope 161 is inserted into the rope hole, the jacking member includes a U-shaped toothed plate groove 57 with a closed bottom end, a straight toothed plate 58 is arranged in the U-shaped toothed plate groove 57, a limit protrusion 581 is arranged on the side wall of the straight toothed plate 58, a limit groove matched with the limit protrusion 581 is arranged on the inner wall of the U-shaped toothed plate groove 57, sliding, the inner wall of the first mounting groove 161 is provided with a movable groove 143 matched with the sliding block 571, the sliding block 571 is slidably clamped in the movable groove 143, one end, away from the second gear 56, of the outer wall of the U-shaped toothed plate groove 57 is provided with a limiting spring 59, the free end of a traction rope is connected with the sliding block 571, when the limiting spring 59 is in a free state, the straight-tooth plate 58 is separated from the second gear 56, the horizontal height of the top end of the second bed plate 22 is larger than the horizontal height of the top end of the first bed plate 21, when a human body lies on the bed, the second bed plate 22 is pressed downwards under the action of the body weight, the second connecting plate 221 presses the pressing plate 231 to drive the traction plate 233 to rotate, when the traction plate 233 rotates, the U-shaped toothed plate groove 57 is pulled by the traction rope to enable the straight-tooth plate 58 to be meshed with the; when the human body stands up, the second bed board 22 loses pressure and returns under the effect of the supporting spring 4 to remove the pulling force on the traction rope, the U-shaped toothed plate groove 57 returns under the effect of the limiting spring 59 to enable the straight-tooth plate 58 to be disengaged from the gear 56, and the second gear 56 rotates to prevent the straight-tooth plate 58 from lifting.

Preferably, the distance between the top end of the limiting plate 18 and the top end of the bed body frame 11 is 6-12 mm, the ratio of the distance from one end of the first connecting groove 141 close to the first hinge ring 51 to the circle center of the first hinge ring 51 to the distance from the free end of the left rod body 52 to the circle center of the first hinge ring 51 is 1:10, and by adopting the structural design, the deflection angle range of the first bed plate 21 is smaller, discomfort caused by the inclination of the first bed plate to a human body is reduced, and meanwhile, the lifting height of the free end of the left rod body 52 is ensured according to the principle of similarity of triangles, so that the jacked guardrail 3 can play an effective protection role.

Preferably, the top end of the supporting column 19 is a rounded structure, and the top end of the supporting column 19 is designed to be smooth, so that the influence of the first bed plate 21 on the deflection of the first bed plate 21 is small.

Preferably, guardrail 3 includes integrated into one piece's guardrail pole 34, the spacing post 31 of guardrail, guardrail support column 32 and guardrail backup pad 33, the spacing post 31 of guardrail is located guardrail pole 34 bottom both ends, bed body frame 11 in first mounting groove 161 outside seted up with the spacing post 31 assorted spacing hole of guardrail, guardrail support column 32 is located between the spacing post 31 of two guardrails, backup pad 33 is connected with support column 32 bottom, backup pad 33 is located second gear 56 top, bed body frame 11 top seted up with guardrail pole 34 assorted railing slot 15, such structural design, guardrail 3 can be accomodate in railing slot 15 completely, avoid 3 guardrail to cause the interference to the human body when need not to use guardrail 3.

Preferably, the ratio of the length dimension of the first bed board 21 to the length dimension of the second bed board 22 is 3:1, and the structural design ensures that the head and the shoulder of the human body are positioned on the second bed board 22 when the human body lies on the bed, so that the second bed board 22 can move downwards against the spring force of the supporting spring 4, and simultaneously, the human body is completely separated from the second bed board 22 when the human body stands up.

Preferably, the total spring force of the support springs 4 between the second bed board 22 and the bed frame 11 is 46-98 newtons, and such a structural design ensures that the support springs 4 under the second bed board 22 have enough spring force to jack up the second bed board 22 after the human body gets up and is separated from the second bed board 22.

Preferably, the first gear 55 and the second gear 56 are of plastic structures, and the arc-shaped toothed plate 54 and the straight toothed plate 57 are of metal structures, so that the structure design can reduce noise generated during transmission to a greater extent by meshing transmission of plastic teeth and metal teeth during use, and avoid influencing sleep of patients; simultaneously, the arc-shaped toothed plate 54 is of a metal structure, so that the rigidity strength is high, and the arc-shaped toothed plate 54 is not easy to deform, so that the transmission effect is reduced.

Preferably, the welding has the strengthening rib between arc pinion rack 54 and the left body of rod 52, and such structural design supports arc pinion rack 54 through the strengthening rib, further mentions the bending resistance of arc pinion rack 54, avoids appearing the transmission failure and leads to the unable condition of rising of guardrail 3.

The orthopedic operation anti-falling bed provided by the invention is described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a bone surgery prevents weighing down bed, includes lathe bed (1), first bed board (21) and second bed board (22), its characterized in that: the lathe bed (1) comprises a grooved bed body frame (11), a support plate (12) and a support (13), the support (13) is installed on the support plate (12), the support plate (12) is detachably connected with the bottom of the bed body frame (11), limiting plates (18) are arranged on groove walls on two sides of the bed body frame (11), a first connecting groove (141) and a second connecting groove (142) are formed in inner walls on two sides of the bed body frame (11), a shaft hole (17) is formed in the middle of one end of the bed tail of the bed body frame (11), a support column (19) is arranged in the middle of the bottom of the bed body frame (11), a shaft groove (191) is formed in the top end of the support column (19), a support column mounting groove (212) is formed in the middle of the first bed plate (21), a support column mounting groove (212) is formed in the bottom of the first bed plate (21), first connecting plates (211) corresponding to the position of the first connecting groove (141) are arranged on, wear to be equipped with the keel axle in shaft hole (17) of first bed board (21), the both ends of keel axle are worn to locate shaft hole (17) on bed body frame (11) and axle box (191) of support column (19) respectively in, second bed board (22) slide the card in bed body frame (11) and locate first bed board (21) one side, second bed board (22) both sides are equipped with second connecting plate (221) corresponding second spread groove (142) position, bed body frame (11) top is equipped with first mounting groove (161) in first bed board (21) both sides, is equipped with second mounting groove (162) in second bed board (22) both sides, evenly be equipped with a plurality of supporting spring (4) between first bed board (21), second bed board (22) and bed body frame (11) tank bottom, be equipped with drive mechanism in first mounting groove (161), drive mechanism includes first lever, first gear (55), Second gear (56) and jacking piece, first lever includes the left body of rod (52), the right body of rod (53) and first articulated ring (51), the left side body of rod (52), the right body of rod (53) are located first articulated ring (51) both sides and with first articulated ring (51) integrated into one piece, the left side body of rod (52) left end integrated into one piece is connected with arc pinion rack (54), arc pinion rack (54) and first gear (55) meshing, arc pinion rack (54) one side and second gear (56) meshing are kept away from in first gear (55), second gear (56) and jacking piece meshing, guardrail (3) are worn to be equipped with in first mounting groove (161) internalization in jacking piece top.

2. The orthopedic operation fall-prevention bed according to claim 1, characterized in that: a second hinged column (234) is arranged on the right side of the second connecting groove (142) in the second mounting groove (162), a traction mechanism is arranged in the second mounting groove (162) and comprises a second hinged ring (232), a pressing plate (231) and a traction plate (233), the second hinged ring (232), the pressing plate (231) and the traction plate (233) are integrally formed and located between the second hinged ring and the traction plate, the second hinged ring (232) is sleeved on the second hinged column (234), the pressing plate (231) is located at the bottom end of the second connecting plate (221), a rope hole is formed in the bed frame (11) between the first mounting groove (161) and the second mounting groove (162), a traction rope is fixedly connected to the free end of the traction plate (233), the traction rope (161) is arranged in the rope hole in a penetrating manner, the jacking piece comprises a U-shaped tooth plate groove (57) with a closed bottom end, a straight-tooth plate (58) is arranged in the U-shaped tooth plate groove (57), be equipped with spacing arch (581) on spur-tooth plate (58) lateral wall, U-shaped pinion rack groove (57) inner wall is equipped with spacing arch (581) assorted spacing groove, U-shaped pinion rack groove (57) both sides lateral wall is equipped with slider (571), first mounting groove (161) inner wall seted up with slider (571) assorted movable groove (143), slider (571) slip card is located in movable groove (143), second gear (56) one end is kept away from to U-shaped pinion rack groove (57) outer wall is installed spacing spring (59), the haulage rope free end is connected with slider (571), spur-tooth plate (58) are in the separation state with second gear (56) during spacing spring (59) free state, second bed board (22) top level is greater than the level on first bed board (21) top.

3. The orthopedic operation fall-prevention bed according to claim 2, characterized in that: the distance between the top end of the limiting plate (18) and the top end of the bed body frame (11) is 6-12 mm, and the ratio of the distance between one end of the first connecting groove (141), which is close to the first hinge ring (51), and the circle center of the first hinge ring (51) to the distance between the free end of the left rod body (52) and the circle center of the first hinge ring (51) is 1: 10.

4. The orthopedic operation fall-prevention bed according to claim 3, characterized in that: the top end of the supporting column (19) is of a round angle structure.

5. The orthopedic operation fall-prevention bed according to claim 4, characterized in that: guardrail (3) are including integrated into one piece's guardrail bar (34), the spacing post of guardrail (31), guardrail support column (32) and guardrail backup pad (33), the spacing post of guardrail (31) is located guardrail bar (34) bottom both ends, bed body frame (11) in first mounting groove (161) outside offer with the spacing post of guardrail (31) assorted spacing hole, guardrail support column (32) are located between two spacing posts of guardrail (31), backup pad (33) are connected with support column (32) bottom, backup pad (33) are located second gear (56) top, bed body frame (11) top seted up with guardrail bar (34) assorted guardrail bar groove (15).

6. The orthopedic operation fall-prevention bed according to claim 5, characterized in that: the ratio of the length sizes of the first bed board (21) and the second bed board (22) is 3: 1.

7. The orthopedic operation fall-prevention bed according to claim 6, characterized in that: the total spring force of the supporting springs (4) between the second bed board (22) and the bed body frame (11) is 46-98 newtons.