Rehabilitation safety bed for orthopedics department

Abstract

The invention relates to the field of nursing beds, in particular to an orthopedic rehabilitation safety bed. Comprising a support, a lifting structure, a safety device and an adjusting structure, the lifting structure comprises a winding wheel and a lifting wire, the adjusting structure comprises an adjusting sliding groove and a synchronizing part, when the winding wheel overspeeds to enable a lifted object to fall, a wire pressing wheel is made to be away from the lower end of a rotating rod along the adjusting sliding groove while pressing the lifting wire downwards, and when the winding wheel overspeeds to enable the lifted object to rush, the synchronizing part is made to be away from the adjusting sliding groove. The adjusting sliding groove is formed in the lower end of the rotating rod, the line pressing wheels are close to the lower end of the rotating rod along the adjusting sliding groove while pressing the lifting line downwards, and the displacement amounts of the two line pressing wheels in the adjusting sliding groove are equal under driving of the synchronizing piece, so that the two line pressing wheels rotate downwards around the hinge point to abut against each other and then quickly lock the lifting line. And the speed can be adjusted in time when falling or jacking suddenly occurs, so that accidents are avoided, and the safety in the lifting process is improved.

Description

Technical Field

[0001] The invention relates to the field of nursing beds, and in particular to an orthopedic rehabilitation safety bed. Background Art

[0002] Orthopedic rehabilitation bed is a nursing device for physical therapy and rehabilitation. When medical staff conduct rehabilitation treatment on surgical patients, they need to use orthopedic rehabilitation nursing bed. Traditional nursing bed, patients cannot operate independently, so it is not conducive to the patient's autonomous recovery. In the later treatment, because the patient's legs cannot be placed on the bed, they need to be set up to ensure a fixed position to ensure that they will not be injured due to accidental squeezing, etc., so it is necessary to lift the patient's legs to a certain height away from the bed surface, but the patient needs to go to the toilet and need to get out of bed, which is very inconvenient. A lifting device is pressed on the nursing bed to lift the patient's legs and other parts that need to be lifted to meet the requirements of nursing rehabilitation. For example, the publication number CN109157356A is called a kind of orthopedic medical auxiliary leg hanging device. By setting a first screw, a second screw, a base, an electric push rod, an air cushion, a hinged shaft, and a cross plate structure, the problem that the leg hanging fixing mechanism cannot be lifted and cannot be applied to all leg types and is not easy to shrink and fold is solved. However, during the lifting process, it is easy to cause the power device to lose control due to various factors. When overspeed occurs, it cannot be stopped in time and accidents are easy to occur. In serious cases, safety accidents will occur. Summary of the invention

[0003] The invention provides an orthopedic rehabilitation safety bed to solve the problem that an overspeed lifting device cannot be timely adjusted in case of an accident.

[0004] An orthopedic rehabilitation safety bed of the present invention adopts the following technical scheme: an orthopedic rehabilitation safety bed, comprising a lifting safety device, the lifting safety device comprising a bracket, a lifting structure, a safety device and an adjustment structure. The bracket comprises a mounting platform arranged in front and back. The lifting structure is arranged at the rear end of the mounting platform, comprising a winding wheel arranged on the left and right sides of the axis and a lifting line arranged in front and back. The rotation direction of the winding wheel is set to a first direction and a second direction in opposite directions. The front end of the lifting line is connected to the lifting object, and the rear end is fixed on the winding wheel, which is used to realize lifting and descending when the winding wheel rotates in the first direction, and to realize lifting and ascending when the winding wheel rotates in the second direction. The safety device is arranged in front of the lifting device, including a wire pressing structure and a driving structure. The wire pressing structure includes two rotating rods. The two rotating rods are symmetrically arranged on the bracket in front and back. The rotating rod is arranged up and down, the lower end is hinged on the bracket, and the two rotating rods are meshed at the hinge end. A wire pressing wheel is rotatably installed on the upper end of the rotating rod. The wire pressing wheel is above the lifting line. The driving structure is configured to drive the two rotating rods to rotate around the hinge point when the speed of the winding wheel is too large, and to press the lifting line downward while moving the two wire pressing wheels away from each other. The adjustment structure includes an adjustment chute and a synchronous member. The adjustment chute is arranged at the upper end of the rotating rod and is arranged along the length direction of the rotating rod. The adjustment structure is configured so that when the winding wheel overspeeds and causes the object to be lifted to fall, the pressing wheel moves away from the lower end of the rotating rod along the adjustment chute while pressing the lifting line downward; when the winding wheel overspeeds and causes the object to be lifted to hit the top, the pressing wheel moves toward the lower end of the rotating rod along the adjustment chute while pressing the lifting line downward, and the two pressing wheels are driven by the synchronous member to have equal displacement in the adjustment chute, so that the two pressing wheels rotate downward around the hinge point until they abut against each other and lock the lifting line.

[0005] Furthermore, the driving structure includes a driving wheel and a driven member. The driving wheel is rotatably mounted on the bracket and is located at the lower side of the two rotating rods, and the driven member is arranged between the rotating rods and the driving wheel, and is used for driving the two rotating rods to move away from each other around the hinge point when the driving wheel rotates in a first direction, and driving the two rotating rods to move away from each other around the hinge point when the driving wheel rotates in a second direction.

[0006] Further, the driven member includes a driven wheel and an arc groove. The arc groove is provided between the rotating rod and the driving wheel, and its center coincides with the center of the driving wheel. The driven wheel is rotatably and slidably installed in the arc groove. The driven wheel and the driving wheel are meshed. The driven wheel and the groove wall of the arc groove are frictionally driven, and the driven wheel is meshed with the hinged end of the rotating rod away from the winding wheel. When the driving wheel rotates in the second direction, the driven wheel slides along the arc groove and meshes with the hinged end of the rotating rod close to the winding wheel.

[0007] Further, the adjustment structure also includes a first gear, a second gear, a first adjustment wheel, a second adjustment wheel, two matching racks and an adjustment rack. The first gear is rotatably mounted on the bracket and is located at the hinge point of the rotating rod close to the winding wheel. The first adjustment wheel is coaxially arranged at one end of the first gear. A one-way tooth is arranged between the first adjustment wheel and the first gear to realize one-way transmission, and the first adjustment wheel drives the first gear to rotate when and only when the first adjustment wheel rotates in the first direction. A first belt is arranged between the first adjustment wheel and the driving wheel for synchronous rotation. The second gear is rotatably mounted on the bracket and is located at the hinge point of the rotating rod away from the winding wheel. The second adjustment wheel is coaxially fixedly connected to one end of the second gear. A second belt is arranged between the adjustment wheel and the driving wheel for synchronous rotation. Two matching racks are symmetrically arranged on both sides of the first gear. The matching racks are arranged up and down, and the upper end can be rotatably mounted on the corresponding pressing wheel shaft. A one-way tooth is arranged between the matching rack and the first adjustment wheel. When the first adjusting wheel rotates in the first direction, the one-way teeth make the matching rack close to the winding wheel approach and mesh with the first gear, and make the matching rack far away from the winding wheel move away from the first gear, so as to drive the pressing wheel close to the winding wheel away from the hinged end of the rotating rod. When the first adjusting wheel rotates in the second direction, the one-way teeth make the matching rack close to the winding wheel move away from the first gear, and make the matching rack far away from the winding wheel approach and mesh with the first gear. The adjusting rack is arranged up and down and is located on one side of the second gear, the upper end of which is rotatably mounted on the corresponding pressing wheel shaft, and the lower end is meshed with the second gear, and when the second gear rotates in the first direction with the second adjusting wheel, the adjusting rack drives the corresponding pressing wheel away from the corresponding hinged end of the rotating rod, and when the second gear rotates in the second direction, on the one hand, the corresponding pressing wheel is driven to approach the corresponding hinged end of the rotating rod, and on the other hand, the first gear is driven to rotate in the second direction through the synchronous member, and the pressing wheel close to the winding wheel is approached to the hinged end of the rotating rod through the matching rack far away from the winding wheel.

[0008] Further, the synchronous member includes a synchronous wheel, a synchronous shaft and a synchronous rack. The synchronous shaft is rotatably arranged on the bracket and is between the first adjusting wheel and the second adjusting wheel. The synchronous wheel is coaxially arranged at one end of the synchronous shaft. A one-way tooth is arranged between the synchronous wheel and the synchronous shaft to realize one-way transmission, and the synchronous wheel drives the synchronous shaft to rotate synchronously when and only when the synchronous wheel rotates in the first direction. The synchronous wheel and the first belt are frictionally driven, and when the driving wheel drives the first belt to rotate in the second direction, the first belt drives the synchronous wheel to rotate in the first direction. The synchronous rack is arranged front and back and can be slidably arranged on the synchronous shaft front and back, the front end is arranged on the upper side of the second gear, and the rear end is arranged on the lower side of the first gear, so that when the synchronous wheel drives the synchronous shaft to rotate in the first direction, the synchronous shaft rotates in the first direction with the synchronous rack and then meshes with the first gear and the second gear.

[0009] Furthermore, the bracket is provided with power shafts arranged on the left and right. The power shaft is rotatably mounted on the rear end of the bracket. The winding wheel is mounted on the power shaft. A rotatable pulley is provided at the front end of the bracket, and the lifting line is connected to the lifting object after contacting the pulley.

[0010] Furthermore, the driving device also includes a centrifugal wheel. The centrifugal wheel is coaxially arranged at one end of the winding wheel. A centrifugal block is arranged on the power shaft. The centrifugal block can slide unidirectionally along the radial direction of the power shaft, and when the power shaft rotates at an overspeed, the centrifugal block is stuck between the centrifugal wheel and the winding wheel under the action of centrifugal force, so that the winding wheel drives the centrifugal wheel to rotate. A third belt is arranged between the centrifugal wheel and the driving wheel for synchronous rotation.

[0011] Furthermore, it also includes a medical bed, and the lifting safety device is installed on the medical bed.

[0012] Furthermore, a support plate is provided at one end of the medical bed. The support plate is arranged vertically, with the lower end fixed on the medical bed and the upper end fixed on the lower side of the mounting platform.

[0013] Furthermore, a curved lifting plate is provided at the front end of the lifting line, and the lifting plate is a flexible plate.

[0014] The beneficial effects of the present invention are as follows: in an orthopedic rehabilitation safety bed of the present invention, when the winding wheel overspeeds and causes the lifting object to fall or rise, the winding wheel triggers the driving structure to drive the two rotating rods to rotate around the hinge point and move the two pressing wheels away from each other while pressing the lifting wire downward, and when the winding wheel overspeeds and causes the lifted object to fall, the adjusting structure causes the pressing wheel to move away from the lower end of the rotating rod along the adjusting chute while pressing the lifting wire downward, so that the lifted object can descend smoothly. When the winding wheel overspeeds and causes the lifted object to hit the top, the adjusting structure causes the pressing wheel to move closer to the lower end of the rotating rod along the adjusting chute while pressing the lifting wire downward to reduce the rotation resistance of the rotating rod, and under the drive of the synchronous member, the displacement of the two pressing wheels in the adjusting chute is equal, so that the two pressing wheels rotate downward around the hinge point until they abut against each other and quickly lock the lifting wire, thereby avoiding the occurrence of danger and improving the safety of the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an orthopedic rehabilitation safety bed of the present invention; Figure 2 It is a structural schematic diagram of a lifting safety device according to an embodiment of the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 It is a structural schematic diagram of a wire pressing structure, a synchronous member, a driven wheel and a driving wheel in an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a synchronizer according to an embodiment of the present invention; Figure 6 It is a state diagram of an embodiment of the present invention when working at a normal lifting speed; Figure 7 It is a state diagram of two rotating rods and two pressing wire wheels when an embodiment of the present invention falls at an overspeed; Figure 8 It is a state diagram of two rotating rods and two pressing wheels of an embodiment of the present invention during overspeed rising; In the figure: 100, bracket; 110, mounting table; 120, power shaft; 130, pulley; 140, centrifugal wheel; 150, third belt; 200, lifting structure; 210, winding wheel; 220, lifting line; 300, safety device; 310, pressing line structure; 311, rotating rod; 312, pressing line wheel; 320, driving structure; 321, driving wheel; 322, driven wheel; 323, arc groove; 331, adjusting slide groove; 332, first gear; 333, second gear; 334, first adjusting wheel; 335, second adjusting wheel; 336, matching rack; 337, first belt; 338, second belt; 339, adjusting rack; 340, synchronous member; 341, synchronous wheel; 342, synchronous shaft; 343, synchronous rack; 400, medical bed; 410, support plate; 420, lifting plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] An embodiment of an orthopedic rehabilitation safety bed, such as Figures 1 to 8 As shown: an orthopedic rehabilitation safety bed, including a medical bed 400, on which a lifting safety device is installed. The lifting safety device includes a bracket 100, a lifting structure 200, a safety device 300 and an adjustment structure. The bracket 100 includes a mounting platform 110 arranged at the front and rear.

[0019] The lifting structure 200 is arranged at the rear end of the mounting platform 110, and includes a winding wheel 210 arranged on the left and right sides of the axis and a lifting line 220 arranged in front and back. The rotation direction of the winding wheel 210 is set to a first direction and a second direction that are opposite in direction. The first direction is set to be clockwise, and the second direction is set to be counterclockwise. The front end of the lifting line 220 is connected to the lifting object, and the rear end is fixed on the winding wheel 210, and is used to achieve lifting and lowering when the winding wheel 210 rotates in the clockwise direction, and to achieve lifting and rising when the winding wheel 210 rotates in the counterclockwise direction.

[0020] The safety device 300 is arranged in front of the lifting device, and includes a wire pressing structure 310 and a driving structure 320. The wire pressing structure 310 includes two rotating rods 311. The two rotating rods 311 are symmetrically arranged on the bracket 100. The rotating rods 311 are arranged up and down, and the lower ends are hinged on the bracket 100, and the two rotating rods 311 are meshed at the hinged ends. A wire pressing wheel 312 is rotatably installed on the upper end of the rotating rod 311. The wire pressing wheel 312 is above the lifting line 220. The driving structure 320 is configured to drive the two rotating rods 311 to rotate around the hinge point when the speed of the winding wheel 210 is too large, and the two wire pressing wheels 312 are moved away from each other while pressing the lifting line 220 downward.

[0021] The adjustment structure includes an adjustment chute 331 and a synchronous member 340. The adjustment chute 331 is arranged at the upper end of the rotating rod 311 and is arranged along the length direction of the rotating rod 311. The adjustment structure is configured so that when the winding wheel 210 is overspeeding and the object being lifted falls, the pressing wheel 312 moves away from the lower end of the rotating rod 311 along the adjustment chute 331 while pressing the lifting line 220 downwards; when the winding wheel 210 is overspeeding and the object being lifted hits the top, the pressing wheel 312 moves toward the lower end of the rotating rod 311 along the adjustment chute 331 while pressing the lifting line 220 downwards; and under the drive of the synchronous member 340, the displacements of the two pressing wheels 312 in the adjustment chute 331 are equal, so that the two pressing wheels 312 rotate downward around the hinge point until they abut against each other and lock the lifting line 220. When the winding wheel 210 is overspeeding and causes the lifting object to fall or rise, the winding wheel 210 triggers the driving structure 320 to drive the two rotating rods 311 to rotate around the hinge point and make the two pressing wire wheels 312 move away from each other while pressing the lifting wire 220, and when the winding wheel 210 is overspeeding and causes the lifted object to fall, the adjusting structure makes the pressing wire wheel 312 move away from the lower end of the rotating rod 311 along the adjusting chute 331 while pressing the lifting wire 220 downward, so that the lifted object can be steadily lowered. When the winding wheel 210 is overspeeding and causes the lifting object to top, the adjusting structure makes the pressing wire wheel 312 move toward the lower end of the rotating rod 311 along the adjusting chute 331 while pressing the lifting wire 220 downward to reduce the rotation resistance of the rotating rod 311, and under the driving of the synchronous member 340, the displacement of the two pressing wire wheels 312 in the adjusting chute 331 is equal, so that the two pressing wire wheels 312 rotate downward around the hinge point until they are in contact and then quickly lock the lifting wire 220, thereby avoiding the occurrence of danger and improving the safety of the device.

[0022] In this embodiment, the driving structure 320 includes a driving wheel 321 and a driven member. The driving wheel 321 is rotatably mounted on the bracket 100 and is located at the lower side of the two rotating rods 311. The driven member is disposed between the rotating rods 311 and the driving wheel 321, and is used to drive the two rotating rods 311 to move away from each other around the hinge point when the driving wheel 321 rotates in the clockwise direction. When the driving wheel 321 rotates in the counterclockwise direction, the driven member drives the two rotating rods 311 to move away from each other around the hinge point. Through the transmission of the driven member, when the driving wheel 321 rotates counterclockwise or clockwise, the driving wheel 321 drives the two rotating rods 311 to move away from each other.

[0023] In this embodiment, the driven member includes a driven wheel 322 and an arc groove 323. The arc groove 323 is provided between the rotating rod 311 and the driving wheel 321, and its center coincides with the center of the driving wheel 321. The driven wheel 322 is rotatably and slidably installed in the arc groove 323. The driven wheel 322 and the driving wheel 321 are meshed. The driven wheel 322 and the groove wall of the arc groove 323 are frictionally driven, and the driven wheel 322 is meshed with the hinged end of the rotating rod 311 away from the winding wheel 210. When the driving wheel 321 rotates in the counterclockwise direction, the driven wheel 322 slides along the arc groove 323 and meshes with the hinged end of the rotating rod 311 close to the winding wheel 210. After the driving wheel 321 switches the direction, it drives the driven wheel 322 to slide in the arc groove 323 away from one of the rotating rods 311 and then meshes with the lower end of the other rotating rod 311 to transmit.

[0024] In this embodiment, the adjustment structure further includes a first gear 332 , a second gear 333 , a first adjustment wheel 334 , a second adjustment wheel 335 , two matching racks 336 and an adjustment rack 339 .

[0025] The first gear 332 is rotatably mounted on the bracket 100 and is located near the hinge point of the rotating rod 311 of the winding wheel 210. The first adjusting wheel 334 is coaxially arranged at one end of the first gear 332. A one-way tooth is arranged between the first adjusting wheel 334 and the first gear 332 to realize one-way transmission, and is used for the first adjusting wheel 334 to drive the first gear 332 to rotate when and only when the first adjusting wheel 334 rotates in the clockwise direction. A first belt 337 is arranged between the first adjusting wheel 334 and the driving wheel 321 to rotate synchronously.

[0026] The second gear 333 is rotatably mounted on the bracket 100 and is located at a hinge point of the rotating rod 311 away from the winding wheel 210. The second adjusting wheel 335 is coaxially fixedly connected to one end of the second gear 333. A second belt 338 is provided between the adjusting wheel and the driving wheel 321 for synchronous rotation.

[0027] Two matching racks 336 are symmetrically arranged on both sides of the first gear 332. The matching racks 336 are arranged up and down, and the upper ends are rotatably mounted on the corresponding wire pressing wheel 312 shaft. A one-way tooth is arranged between the matching rack 336 and the first adjusting wheel 334. When the first adjusting wheel 334 rotates in the clockwise direction, the matching rack 336 close to the winding wheel 210 is moved closer to and meshed with the first gear 332 through the one-way tooth, and the matching rack 336 away from the winding wheel 210 is moved away from the first gear 332, so as to drive the wire pressing wheel 312 close to the winding wheel 210 away from the hinged end of the rotating rod 311. When the first adjusting wheel 334 rotates in the counterclockwise direction, the matching rack 336 close to the winding wheel 210 is moved away from the first gear 332 through the one-way tooth, and the matching rack 336 away from the winding wheel 210 is moved closer to and meshed with the first gear 332.

[0028] The adjusting rack 339 is arranged up and down and is located on one side of the second gear 333. The upper end is rotatably mounted on the corresponding pressing wheel 312 shaft, and the lower end is meshed with the second gear 333. When the second gear 333 rotates in the clockwise direction with the second adjusting wheel 335, the adjusting rack 339 drives the corresponding pressing wheel 312 away from the corresponding hinged end of the rotating rod 311. When the second gear 333 rotates in the counterclockwise direction, on the one hand, the corresponding pressing wheel 312 is driven to approach the hinged end of the corresponding rotating rod 311. On the other hand, the first gear 332 is driven to rotate in the counterclockwise direction through the synchronous member 340, and the pressing wheel 312 close to the winding wheel 210 is made to approach the hinged end of the rotating rod 311 through the matching rack 336 away from the winding wheel 210. When the winding wheel 210 overspeeds and causes the lifting plate 420 to fall, the driving wheel 321 drives the first adjusting wheel 334 to rotate clockwise through the first belt 337. When the first adjusting wheel 334 rotates clockwise, it will drive the first gear 332 to rotate in the same direction. When the first gear 332 rotates clockwise, it meshes with the matching rack 336 near the winding wheel 210 to drive the pressing wheel 312 near the winding wheel 210 away from the hinged end of the rotating rod 311. The driving wheel 321 drives the second adjusting wheel 335 to rotate clockwise through the second belt 338. When the second gear 333 rotates clockwise, it meshes with the adjusting rack 339 to drive the pressing wheel 312 away from the winding wheel 210 away from the hinged end of the rotating rod 311. Since the rotation direction of the rotating rod 311 close to the winding wheel 210 is opposite to the rotation direction of the first gear 332, and the rotation direction of the rotating rod 311 far from the winding wheel 210 is the same as the rotation direction of the second gear 333, the displacement value of the pressing wheel 312 close to the winding wheel 210 on the rotating rod 311 is greater than the displacement value of the pressing wheel 312 far from the winding wheel 210 on the rotating rod 311. Figure 7When the lifting line 220 is pressed down at the position, it will not get stuck, so that when the lifted object falls at an excessive speed, the safety device 300 and the adjustment structure will cause the lifted object to slowly land on the medical bed 400.

[0029] In this embodiment, the synchronous member 340 includes a synchronous wheel 341, a synchronous shaft 342 and a synchronous rack 343. The synchronous shaft 342 is rotatably disposed on the bracket 100 and is located between the first adjustment wheel 334 and the second adjustment wheel 335. The synchronous wheel 341 is coaxially disposed at one end of the synchronous shaft 342. A one-way tooth is disposed between the synchronous wheel 341 and the synchronous shaft 342 to realize one-way transmission, and the synchronous wheel 341 drives the synchronous shaft 342 to rotate synchronously when and only when the synchronous wheel 341 rotates in the clockwise direction. The synchronous wheel 341 and the first belt 337 are frictionally driven, and when the driving wheel 321 drives the first belt 337 to rotate in the counterclockwise direction, the first belt 337 drives the synchronous wheel 341 to rotate in the clockwise direction. The synchronous rack 343 is disposed front and back and is slidably disposed on the synchronous shaft 342 front and back. The front end of the synchronous rack 343 is arranged on the upper side of the second gear 333, and the rear end of the synchronous rack 343 is arranged on the lower side of the first gear 332, so that when the synchronous wheel 341 drives the synchronous shaft 342 to rotate in the clockwise direction, the synchronous shaft 342 rotates in the clockwise direction with the synchronous rack 343 and then meshes with the first gear 332 and the second gear 333. When the winding wheel 210 overspeeds and causes the lifting plate 420 to rise and top, the driving wheel 321 drives the second adjusting wheel 335 to rotate counterclockwise through the second belt 338. When the second gear 333 rotates counterclockwise, it meshes with the adjusting rack 339 to drive the pressing wheel 312 away from the winding wheel 210 to approach the hinged end of the rotating rod 311. The driving wheel 321 drives the first adjusting wheel 334 to rotate counterclockwise through the first belt 337. At this time, the first belt 337 drives the synchronous wheel 341 to rotate clockwise, and the synchronous shaft 342 drives the synchronous rack 343 to rotate clockwise until the synchronous rack 343 is meshed with the first gear 332 and the second gear 333. Since the first adjusting wheel 334 will not rotate with the first gear 332 when rotating counterclockwise, the second gear 333 drives the first gear 332 to continue to rotate clockwise through the adjusting rack 339. At this time, the first gear 332 is meshed with the matching rack 336 far away from the winding wheel 210 to drive the pressing wheel 312 close to the winding wheel 210 to approach the hinged end of the rotating rod 311. Since the rotation direction of the rotating rod 311 close to the winding wheel 210 is opposite to the rotation direction of the first gear 332, and the rotation direction of the rotating rod 311 far from the winding wheel 210 is also opposite to the rotation direction of the second gear 333, the displacement value of the pressing wheel 312 close to the winding wheel 210 on the rotating rod 311 is equal to the displacement value of the pressing wheel 312 far from the winding wheel 210 on the rotating rod 311. Figure 8When the lifting wire 220 is at the position of the lifting wire 220, the two pressing wire wheels 312 rotate in the same direction under the friction of the lifting wire 220. When the two pressing wire wheels 312 collide and get stuck to lock the lifting wire 220, when the lifting object rises at an excessive speed and reaches the top, the lifting object will stop rising under the action of the safety device 300 and the adjustment structure to avoid straining the injured part of the patient, thereby avoiding accidents that may cause secondary injuries to the patient and improving the safety of rehabilitation after orthopedic surgery.

[0030] In this embodiment, a power shaft 120 is provided on the bracket 100 along the left-right direction. The power shaft 120 is rotatably mounted at the rear end of the bracket 100. The winding wheel 210 is mounted on the power shaft 120. A rotatable pulley 130 is provided at the front end of the bracket 100, and the lifting line 220 is connected to the lifting object after contacting the pulley 130. The power shaft 120 is used to drive the winding wheel 210 to rotate.

[0031] In the present embodiment, the driving device further comprises a centrifugal wheel 140. The centrifugal wheel 140 is coaxially arranged at one end of the reel 210. A centrifugal block is arranged on the power shaft 120. The centrifugal block can slide radially in one direction along the power shaft 120, and when the power shaft 120 is overspeeded, the centrifugal block is stuck between the centrifugal wheel 140 and the reel 210 under the action of centrifugal force, so that the reel 210 drives the centrifugal wheel 140 to rotate. A third belt 150 is arranged between the centrifugal wheel 140 and the driving wheel 321 to rotate synchronously. When the reel 210 is overspeeded, the centrifugal block is stuck between the centrifugal wheel 140 and the reel 210 under the action of centrifugal force to trigger the safety device 300 and the regulating structure to decelerate or stop the overspeed lifting line 220.

[0032] In this embodiment, a support plate 410 is provided at one end of the medical bed 400. The support plate 410 is vertically arranged, with the lower end fixed on the medical bed 400 and the upper end fixed on the lower side of the mounting platform 110. The support plate 410 enables the lifting safety device to be at a suitable height.

[0033] In this embodiment, a curved lifting plate 420 is provided at the front end of the lifting line 220. The lifting plate 420 is a flexible plate to make the injured part of the patient to be lifted more comfortable.

[0034] In combination with the above embodiments, the use principle and working process of the present invention are as follows: when in use, the patient lies flat on the medical bed 400, places the legs that need to be lifted on the lifting plate 420 and fixes them, and then adjusts the lifting plate 420 to a suitable height by rotating the winding wheel 210.

[0035] When the winding wheel 210 overspeeds and causes the lifting plate 420 to fall, the centrifugal wheel 140 rotates clockwise along with the winding wheel 210. The centrifugal wheel 140 drives the driven wheel 322 to rotate counterclockwise in the arc groove 323 while driving the driving wheel 321 clockwise through the third belt 150, and approaches the rotating rod 311 away from the winding wheel 210 and engages with the transmission, so that the two rotating rods 311 rotate around their respective hinge points and move away from each other.

[0036] At the same time, the driving wheel 321 drives the first adjusting wheel 334 to rotate clockwise through the first belt 337. Since the first adjusting wheel 334 rotates clockwise, it will drive the first gear 332 to rotate in the same direction. When the first gear 332 rotates clockwise, it meshes with the matching rack 336 close to the winding wheel 210 to drive the pressing wheel 312 close to the winding wheel 210 away from the hinged end of the rotating rod 311. The driving wheel 321 drives the second adjusting wheel 335 to rotate clockwise through the second belt 338. When the second gear 333 rotates clockwise, it meshes with the adjusting rack 339 to drive the pressing wheel 312 away from the winding wheel 210 away from the hinged end of the rotating rod 311.

[0037] Since the rotation direction of the rotating rod 311 close to the winding wheel 210 is opposite to the rotation direction of the first gear 332, and the rotation direction of the rotating rod 311 far from the winding wheel 210 is the same as the rotation direction of the second gear 333, the displacement value of the pressing wheel 312 close to the winding wheel 210 on the rotating rod 311 is greater than the displacement value of the pressing wheel 312 far from the winding wheel 210 on the rotating rod 311. Figure 7 When the lifting line 220 is pressed down at the position, it will not get stuck, so that when the lifted object falls at an excessive speed, the safety device 300 and the adjustment structure will cause the lifted object to slowly land on the medical bed 400.

[0038] When the winding wheel 210 overspeeds and causes the lifting plate 420 to rise and hit the top, the centrifugal wheel 140 rotates counterclockwise along with the winding wheel 210. The centrifugal wheel 140 drives the driven wheel 322 to rotate clockwise in the arc groove 323 while driving the driving wheel 321 through the third belt 150 to approach the rotating rod 311 close to the winding wheel 210 and engage the transmission, so that the two rotating rods 311 rotate around their respective hinge points and move away from each other.

[0039] At the same time, the driving wheel 321 drives the second adjusting wheel 335 to rotate counterclockwise through the second belt 338. When the second gear 333 rotates counterclockwise, it meshes with the adjusting rack 339 to drive the pressing wheel 312 away from the winding wheel 210 to approach the hinged end of the rotating rod 311.

[0040] The driving wheel 321 drives the first adjusting wheel 334 to rotate counterclockwise through the first belt 337. At this time, the first belt 337 drives the synchronous wheel 341 to rotate clockwise, and the synchronous shaft 342 drives the synchronous rack 343 to rotate clockwise until the synchronous rack 343 is engaged with the first gear 332 and the second gear 333. Since the first adjusting wheel 334 does not rotate with the first gear 332 when rotating counterclockwise, the second gear 333 drives the first gear 332 to continue to rotate clockwise through the adjusting rack 339. At this time, the first gear 332 is engaged with the matching rack 336 away from the winding wheel 210 to drive the pressing wheel 312 close to the winding wheel 210 to approach the hinged end of the rotating rod 311.

[0041] Since the rotation direction of the rotating rod 311 close to the winding wheel 210 is opposite to the rotation direction of the first gear 332, and the rotation direction of the rotating rod 311 far from the winding wheel 210 is also opposite to the rotation direction of the second gear 333, the displacement value of the pressing wheel 312 close to the winding wheel 210 on the rotating rod 311 is equal to the displacement value of the pressing wheel 312 far from the winding wheel 210 on the rotating rod 311. Figure 8 When the lifting wire 220 is at the position of the lifting wire 220, the two pressing wire wheels 312 rotate in the same direction under the friction of the lifting wire 220. When the two pressing wire wheels 312 collide and get stuck to lock the lifting wire 220, when the lifting object rises at an excessive speed and reaches the top, the lifting object will stop rising under the action of the safety device 300 and the adjustment structure to avoid straining the injured part of the patient, thereby avoiding accidents that may cause secondary injuries to the patient and improving the safety of rehabilitation after orthopedic surgery.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An orthopedic rehabilitation safety bed, including a lifting safety device, characterized in that: Lifting safety devices include: A bracket, including mounting platforms arranged at the front and rear; The lifting structure is arranged at the rear end of the mounting platform, and includes a winding wheel arranged on the left and right sides of the axis and a lifting line arranged at the front and back sides; the rotation direction of the winding wheel is set to a first direction and a second direction which are opposite to each other; the front end of the lifting line is connected to the lifting object, and the rear end is fixed on the winding wheel, and is used to realize lifting and lowering when the winding wheel rotates in the first direction, and to realize lifting and rising when the winding wheel rotates in the second direction; The safety device is arranged in front of the lifting device, and includes a wire pressing structure and a driving structure; the wire pressing structure includes two rotating rods; the two rotating rods are symmetrically arranged on the bracket; the rotating rods are arranged up and down, the lower ends of the rotating rods are hinged on the bracket, and the two rotating rods are meshed at the hinged ends; a wire pressing wheel is rotatably installed on the upper end of the rotating rod; the wire pressing wheel is above the lifting line; the driving structure is configured to drive the two rotating rods to rotate around the hinge point when the speed of the winding wheel is too large, and the two wire pressing wheels are moved away from each other while pressing the lifting line downward; The adjusting structure comprises an adjusting slot and a synchronizing member; the adjusting slot is arranged at the upper end of the rotating rod and is arranged along the length direction of the rotating rod; the adjusting structure is configured so that when the winding wheel overspeeds and causes the lifted object to fall, the pressing wheel moves away from the lower end of the rotating rod along the adjusting slot while pressing the lifting line downward, and when the winding wheel overspeeds and causes the lifted object to hit the top, the pressing wheel moves toward the lower end of the rotating rod along the adjusting slot while pressing the lifting line downward, and driven by the synchronizing member, the displacements of the two pressing wheels in the adjusting slot are equal, so that the two pressing wheels rotate downward around the hinge point until they abut against each other and lock the lifting line.

2. The orthopedic rehabilitation safety bed according to claim 1, characterized in that: The driving structure includes a driving wheel and a follower; the driving wheel is rotatably mounted on the bracket and is located at the lower side of the two rotating rods, and the follower is arranged between the rotating rods and the driving wheel. When the driving wheel rotates in a first direction, the follower drives the two rotating rods to move away from each other around the hinge point, and when the driving wheel rotates in a second direction, the follower drives the two rotating rods to move away from each other around the hinge point.

3. The orthopedic rehabilitation safety bed according to claim 2, characterized in that: The driven member includes a driven wheel and an arc-shaped groove; the arc-shaped groove is arranged between the rotating rod and the driving wheel, and its center coincides with the center of the driving wheel; the driven wheel is rotatably and slidably installed in the arc-shaped groove; the driven wheel and the driving wheel are meshed; the driven wheel and the groove wall of the arc-shaped groove are frictionally transmitted, the driven wheel is meshed with the hinged end of the rotating rod away from the winding wheel, and when the driving wheel rotates along the second direction, the driven wheel slides along the arc-shaped groove and meshes with the hinged end of the rotating rod close to the winding wheel.

4. The orthopedic rehabilitation safety bed according to claim 3, characterized in that: The adjustment structure also includes a first gear, a second gear, a first adjustment wheel, a second adjustment wheel, two matching racks and an adjustment rack; The first gear is rotatably mounted on the bracket and is located near the hinge point of the rotating rod of the winding wheel; The first adjusting wheel is coaxially arranged at one end of the first gear; a one-way tooth is arranged between the first adjusting wheel and the first gear to realize one-way transmission, and the first adjusting wheel drives the first gear to rotate when and only when the first adjusting wheel rotates in the first direction; a first belt is arranged between the first adjusting wheel and the driving wheel to rotate synchronously; The second gear is rotatably mounted on the bracket and is located at a hinge point of the rotating rod away from the winding wheel; The second adjusting wheel is coaxially fixedly connected to one end of the second gear; a second belt is provided between the adjusting wheel and the driving wheel for synchronous rotation; Two matching racks are symmetrically arranged on both sides of the first gear; the matching racks are arranged up and down, and the upper ends are rotatably mounted on the corresponding wire pressing wheel shaft; a one-way tooth is arranged between the matching rack and the first adjusting wheel; when the first adjusting wheel rotates along the first direction, the matching rack close to the winding wheel is made to approach and mesh with the first gear through the one-way tooth, and the matching rack far away from the winding wheel is made to move away from the first gear, so as to drive the wire pressing wheel close to the winding wheel away from the hinged end of the rotating rod; when the first adjusting wheel rotates along the second direction, the matching rack close to the winding wheel is made to move away from the first gear through the one-way tooth, and the matching rack far away from the winding wheel is made to approach and mesh with the first gear; The adjusting rack is arranged up and down and is on one side of the second gear. The upper end is rotatably mounted on the corresponding wire pressing wheel shaft, and the lower end is meshed with the second gear. When the second gear rotates along the first direction with the second adjusting wheel, the adjusting rack drives the corresponding wire pressing wheel away from the corresponding hinged end of the rotating rod. When the second gear rotates along the second direction, on the one hand, it drives the corresponding wire pressing wheel close to the corresponding hinged end of the rotating rod, and on the other hand, drives the first gear to rotate in the second direction through the synchronous member, and makes the wire pressing wheel close to the winding wheel approach the hinged end of the rotating rod through the matching rack away from the winding wheel.

5. The orthopedic rehabilitation safety bed according to claim 4, characterized in that: The synchronous parts include synchronous wheels, synchronous shafts and synchronous racks; The synchronization shaft is rotatably arranged on the bracket and is located between the first adjustment wheel and the second adjustment wheel; The synchronous wheel is coaxially arranged at one end of the synchronous shaft; a one-way tooth is arranged between the synchronous wheel and the synchronous shaft to realize one-way transmission, and the synchronous wheel drives the synchronous shaft to rotate synchronously when and only when the synchronous wheel rotates in the first direction; the synchronous wheel and the first belt are frictionally driven, and when the driving wheel drives the first belt to rotate in the second direction, the first belt drives the synchronous wheel to rotate in the first direction; The synchronous rack is arranged front and back and can be slidably arranged on the synchronous shaft front and back. The front end is arranged on the upper side of the second gear, and the rear end is arranged on the lower side of the first gear. When the synchronous wheel drives the synchronous shaft to rotate in the first direction, the synchronous shaft rotates in the first direction with the synchronous rack and then engages with the first gear and the second gear.

6. The orthopedic rehabilitation safety bed according to claim 1, characterized in that: The bracket is provided with power shafts arranged on the left and right; the power shaft is rotatably installed at the rear end of the bracket; the winding wheel is installed on the power shaft; a rotatable pulley is provided at the front end of the bracket, and the lifting line is connected to the lifting object after contacting the pulley.

7. The orthopedic rehabilitation safety bed according to claim 6, characterized in that: The driving device also includes a centrifugal wheel; the centrifugal wheel is coaxially arranged at one end of the winding wheel; a centrifugal block is arranged on the power shaft; the centrifugal block can slide unidirectionally along the radial direction of the power shaft, and when the power shaft rotates at an overspeed, the centrifugal block is stuck between the centrifugal wheel and the winding wheel under the action of centrifugal force, so that the winding wheel drives the centrifugal wheel to rotate; a third belt is arranged between the centrifugal wheel and the driving wheel for synchronous rotation.

8. The orthopedic rehabilitation safety bed according to claim 7, characterized in that: The invention also comprises a medical bed, on which a lifting safety device is arranged.

9. The orthopedic rehabilitation safety bed according to claim 8, characterized in that: A support plate is provided at one end of the medical bed; the support plate is arranged vertically, the lower end of the support plate is fixed on the medical bed, and the upper end of the support plate is fixed on the lower side of the mounting platform.

10. The orthopedic rehabilitation safety bed according to claim 8, characterized in that: An arc-shaped lifting plate is arranged at the front end of the lifting line; the lifting plate is a flexible plate.

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