A medical transfer bed

Abstract

The present invention discloses a medical transfer bed, comprising a vehicle body and a movable bed plate mechanism; the movable bed plate mechanism is mounted on a vehicle frame of the vehicle body; the movable bed plate mechanism comprises an upper movable plate, an upper movable cloth, a lower movable plate, and a lower movable cloth; the lower movable plate is arranged below the upper movable plate, and the upper movable plate and the lower movable plate move forward or backward synchronously and laterally; the upper movable cloth is coated on the outer periphery of the upper movable plate, and a locking strip is longitudinally fixed to the upper movable cloth, and the locking strip is locked on the receiving and delivering side of the upper movable cloth or moves with the upper movable cloth after being released; the lower movable cloth is coated on the outer periphery of the lower movable plate, and both ends of the lower movable cloth are fixed on the vehicle frame of the vehicle body and are located on the receiving and delivering side of the lower movable plate. The present invention replaces the method of rotating the transmission cloth by driving a rubber roller in the prior art by arranging a locking strip, simplifies the structure of the movable bed plate mechanism, has no friction coefficient requirement for the movable cloth, has smaller movement resistance, and consumes less power.

Description

Technical Field

[0001] The present invention relates to a transportation tool technology for loading and unloading patients, and in particular to a medical patient transfer bed suitable for transporting post-operative patients in hospitals or transporting patients who are easily injured again during the transport process. Background Art

[0002] At present, medical transfer beds are used to move and transfer patients who are unable to move before and after surgery, and to move patients from beds to transfer beds, and then from transfer beds to operating tables or equipment that requires examination / treatment, or vice versa. Especially for patients with wounds or patients who have undergone serious spinal, cervical, or thoracic spine surgeries, the birth of medical transfer beds reduces the labor intensity of medical staff and avoids the secondary injuries that may be caused by moving patients several times during the transfer period before and after surgery, such as the possibility of affecting wounds or lesions, which not only causes great pain to patients, but is also not conducive to the healing of wounds after surgery.

[0003] The medical transfer beds currently sold or used on the market mainly consist of two parts, one part is the body for movement, and the other part is the movable bed plate mechanism for lateral movement to pick up and drop off patients; such as the "medical patient transport vehicle" disclosed in Chinese Patent 98205338.X, which includes a body and a conveyor bed table (movable bed plate mechanism), the conveyor bed table consists of a conveyor roller, a driven roller and a conveyor cloth belt installed on the conveyor roller and the driven roller, and the conveyor bed table can be translated horizontally forward and backward under the action of a motor. Another example is the "medical patient transfer vehicle" disclosed in Chinese Patent 200610052776.3, in which the movable bed plate mechanism adopts a double-layer combination structure of an upper moving frame / upper moving cloth and a lower moving frame / lower moving cloth, specifically including a cloth rolling shaft frame, a cloth rolling shaft, an end joint seat, a clutch gear, an upper moving frame / upper moving cloth, a lower moving frame / lower moving cloth and other components. However, these medical transfer beds have the following defects:

[0004] 1. Structural issues

[0005] The above-mentioned transmission cloth belt (Chinese Patent 98205338.X) or upper moving cloth (Chinese Patent 200610052776.3) drives the rubber roller to rotate, thereby driving the transmission cloth belt or upper moving cloth set on the rubber roller to move forward and backward horizontally to get close to or away from the operating table / bed. Since the transmission of the cloth surface requires a certain tension, the tension of the cloth surface needs to be adjusted after a long time of use; the cloth surface must be replaced when it is stretched to a certain extent, otherwise the guardrails set on both sides of the vehicle body cannot be closed; the cloth surface of this structure is easy to move left and right and needs to be adjusted; in addition, the setting of the rubber roller will also cause many problems, such as the attachment to the instruction manual of the "medical patient transfer vehicle" disclosed in Chinese Patent 200610052776.3 Fig.16The gap between the middle rubber roller 15 and the end joint seat 16 can easily cause clothes to be rolled into the rubber roller, and hair may be caught during the patient's transportation. In addition, there may be problems such as aging of the rubber roller, which requires replacement of the rubber roller and re-adjustment of the equipment operation status.

[0006] For example, the transmission mechanism of Chinese Patent 200610052776.3 adopts clutch transmission, and the clutch adopts a mechanical control structure of two clutch gears engaging and disengaging. Its disadvantage is that the design structure is complex and prone to failure; especially the clutch part, when it needs to be engaged, when the two teeth of the two clutch gears are not coordinated, it will cause unsmooth engagement, and when it needs to be separated, there will be separation resistance when the two teeth are engaged, resulting in large differences in movement and positioning, and the patient transfer work cannot be completed perfectly.

[0007] In addition, the transmission cloth belt or the upper and lower moving cloths are all annular closed conveying cloths, which are in direct contact with the patient's body and are the main components for directly transporting patients. Due to the needs of medical hygiene, the disinfection of the transmission cloth belt or the upper and lower moving cloths can easily lead to cracking of the cloth surface interface and insufficient structural strength.

[0008] 2. Hygiene issues

[0009] The transmission cloth belt or the upper and lower moving cloths are in direct contact with the patient's body, and the cloth surface is easily dirty, including stains such as blood, human exudate, and therapeutic drug exudate. Since the transmission cloth belt or the upper and lower moving cloths are all circular closed conveyor cloths, it is difficult to clean them when they are hidden in the machine, and it is also difficult to replace the conveyor cloth. The workload of disassembling and assembling the conveyor cloth to replace it is no less than the workload of assembling a new machine. Therefore, the problem of dirty cloth surface cannot be solved.

[0010] 3. Security issues

[0011] The method of driving the rubber roller to rotate by the driving mechanism, thereby driving the transmission cloth mounted on the rubber roller to move back and forth, may result in misoperation, resulting in the patient hitting the end joint seat 16 or even crossing the end joint seat 16 and falling onto the transfer bed frame. Under normal conditions, when a person lies on the transmission cloth, the driving mechanism stops driving the rubber roller to rotate, and the transmission cloth is in a stationary state. It only needs to move the up and down moving plates to complete the transfer to the desired location. If the patient is already on the transfer bed and the button for inserting the bed is pressed by mistake, the patient will hit the end joint seat 16 or even cross the end joint seat 16 and fall onto the transfer bed frame, resulting in a medical accident. Summary of the invention

[0012] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a medical transfer bed.

[0013] The objective of the present invention is achieved by adopting the following technical scheme: a medical transfer bed, comprising a vehicle body with a lifting mechanism and equipped with universal casters, and a movable bed board mechanism for transversely moving to pick up and drop off patients; the movable bed board mechanism is installed on the vehicle frame of the vehicle body; the movable bed board mechanism comprises an upper movable plate, an upper movable cloth, a lower movable plate, and a lower movable cloth; the lower movable plate is arranged below the upper movable plate, and the upper movable plate and the lower movable plate move forward or backward transversely synchronously; the upper movable cloth is coated on the outer periphery of the upper movable plate, and a locking strip is longitudinally fixed to the upper movable cloth, and the locking strip is locked on the pick-up and drop-off side of the upper movable cloth or moves with the upper movable cloth after being released; the lower movable cloth is coated on the outer periphery of the lower movable plate, and the two ends of the lower movable cloth are fixed on the vehicle frame and located on the pick-up and drop-off side of the lower movable plate.

[0014] Preferably, the upper moving cloth is a circular closed conveying cloth.

[0015] Preferably, the upper moving cloth and / or the lower moving cloth are provided with a longitudinal opening.

[0016] Preferably, the medical transfer bed further comprises fixing parts for fixing the cloth openings at both ends of the lower moving cloth.

[0017] Preferably, the locking strip is one-piece or split; the split locking strip includes an upper clamping strip, a lower clamping strip arranged below the upper clamping strip, and a locking switch that clamps and locks the upper clamping strip and the lower clamping strip; the upper movable cloth is arranged between the upper clamping strip and the lower clamping strip.

[0018] Preferably, the locking switch includes a spring, a spring seat, a hinge shaft, and an eccentric cam handle; the spring sleeve is arranged on the spring seat, the spring seat passes through the lower clamping strip and the upper clamping strip in sequence, and extends from the surface of the upper clamping strip, and the eccentric cam handle is hinged to the top of the spring sleeve through the hinge shaft.

[0019] Preferably, the upper movable plate and / or the lower movable plate are provided with wave patterns.

[0020] Preferably, the upper movable plate and the lower movable plate are driven by a movable plate driving mechanism to synchronously move forward or backward laterally, and the movable plate driving mechanism includes a first connecting rod shaft longitudinally arranged at the bottom of the frame of the vehicle body, a first main sprocket installed in the middle of the first connecting rod shaft, a first power output sprocket connected to the first main sprocket through a first roller chain, and a movable plate motor sleeved on the first power output sprocket; first sprocket assemblies are installed at both ends of the first connecting rod shaft; each group of first sprocket assemblies includes a first outer main sprocket, a first slave sprocket, and a first transmission roller chain; the first outer main sprocket is sleeved on the first connecting rod shaft, and the first slave sprocket is respectively installed at the front end and the rear end of the frame, the first outer main sprocket and the first slave sprocket are adapted with a first transmission roller chain, and the two ends of the upper and lower movable plates are respectively fixed on the first transmission roller chain through a first connecting block.

[0021] Preferably, the locking strip is locked by a locking strip driving mechanism at the receiving and delivering side of the upper moving cloth or moves with the upper moving cloth after being unlocked; the locking strip driving mechanism includes a second connecting rod shaft longitudinally arranged at the bottom of the frame of the vehicle body, a second main sprocket installed in the middle of the second connecting rod shaft, a second power output sprocket connected to the second main sprocket through a second roller chain, and a locking strip motor sleeved on the second power output sprocket; a second sprocket assembly is installed at both ends of the second connecting rod shaft; each group of second sprocket assemblies includes a second outer main sprocket, a second slave sprocket, and a second transmission roller chain; the second outer main sprocket is sleeved on the second connecting rod shaft, and the second slave sprocket is respectively installed at the front end and the rear end of the frame, the second outer main sprocket and the second slave sprocket are respectively equipped with a second transmission roller chain, and the two ends of the locking strip are respectively fixed on the second transmission roller chain through a second connecting block.

[0022] Preferably, the locking strip driving mechanism is selected from one or a combination of two or more of a motor, a ratchet, a brake mechanism, and an electromagnetic device.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The locking bar is driven by the locking mechanism to move the locking bar laterally so as to pull the upper moving cloth to move laterally forward and backward on the upper moving plate. When the moving bed plate mechanism needs to retract the upper and lower moving plates when receiving a patient and to extend the upper and lower moving plates when delivering a patient (i.e., when the upper moving plate is loaded with a patient), the upper and lower moving plates move laterally under the driving of the moving bed driving mechanism, and the locking bar driving mechanism drives the locking bar and the upper moving plate to move synchronously forward and backward laterally. The patient lying on the upper moving plate and the locking bar are relatively stationary. This process overcomes the friction force generated by the passive rotation of the lower moving cloth relative to the lower moving plate and the friction force at the contact surface of the upper and lower moving cloth, so that the upper moving plate, the upper moving cloth and the patient are relatively stationary. The lower moving cloth moves relative to the lower moving plate and the upper moving plate, but the contact portion of the lower moving cloth with the bed surface and the bed surface is still relatively stationary, so the resistance is still relatively small, and there is no problem of rolled-up bed sheet. When the moving bed board mechanism needs to extend the upper and lower moving boards to receive a patient or retract the upper and lower moving boards to send a patient, the locking bar driving mechanism self-locks the locking bar and fixes the locking bar in the initial position. At this time, the upper and lower moving boards move forward and backward transversely at the same time (forward transverse movement refers to the gradual insertion of the upper and lower moving boards between the patient and the bed, and backward transverse movement refers to the gradual withdrawal of the upper and lower moving boards between the patient and the bed), the lower moving cloth moves relative to the lower moving board, and the contact portion of the lower moving cloth with the bed surface remains relatively still, and the upper moving cloth The contact surface with the lower moving cloth also remains relatively still, and the contact part of the upper moving cloth with the patient also remains relatively still. Therefore, during the overall movement of the upper and lower moving plates, except for the relative movement between the moving cloth and the corresponding moving plate, there is no other relative movement. In other words, there is no sliding friction such as between the moving cloth and the bed surface / patient, so the resistance is very small, and the bed and the patient are relatively still with the moving cloth in contact with them, so it can be ensured that the moving plate is smoothly inserted under the patient, and the bed sheet will not be driven, and the patient will not be pushed or pulled. The whole pick-up process is very smooth, with low friction and resistance.

[0025] In general, the present invention replaces the method of driving rubber rollers to rotate the transmission cloth in the prior art by providing a locking strip and a power mechanism for the locking strip, thereby simplifying the structure of the movable bed board mechanism. No rubber rollers are required, that is, there are no problems related to rubber rollers, such as no need to adjust the tension of the cloth surface, the movement of the cloth surface, the clipping of hair, the rolling of clothes, the aging of the rubber rollers that need to be replaced, the complex transmission of the clutch, and medical accidents caused by falls due to misoperation. At the same time, the present invention makes it smoother to pick up and drop off patients. Compared with the prior art, the resistance and friction in the process of picking up and dropping off patients are greatly reduced, and the movable plate can be inserted under the patient very smoothly without human intervention. There is no requirement for the friction coefficient of the movable cloth, the moving resistance is smaller, the power consumption is smaller, a smaller power drive motor can be used, the transmission is simpler, and it is more conducive to increasing the load capacity of the whole vehicle and reducing the production cost.

[0026] (2) The upper movable cloth and / or the lower movable cloth is designed to be in an open form, which can meet the needs of disassembly and replacement, achieve the purpose of infection prevention, and will not affect the strength after disinfection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of a medical transfer bed according to a preferred embodiment of the present invention;

[0028] Figure 2 It is a partial three-dimensional schematic diagram of a medical transfer bed according to a preferred embodiment of the present invention;

[0029] Figure 3 It is a three-dimensional schematic diagram of the movable bed board mechanism of a preferred embodiment of the present invention (the movable bed board mechanism is not extended forward);

[0030] Figure 4 for Figure 3 A magnified schematic diagram of the middle A area;

[0031] Figure 5 It is a three-dimensional schematic diagram of the movable bed board mechanism of a preferred embodiment of the present invention (the movable bed board mechanism is in a state of extending forward);

[0032] Figure 6 This is a schematic diagram of the connection structure of the upper moving plate and the lower moving plate of a preferred embodiment of the present invention (including the upper and lower moving cloths);

[0033] Figure 7 for Figure 6 A magnified schematic diagram of the middle B area;

[0034] Figure 8 This is a schematic diagram of the connection structure of the upper moving plate and the lower moving plate in a preferred embodiment of the present invention (excluding the upper and lower moving cloths);

[0035] Fig. 9 for Figure 8 Enlarged schematic diagram of the middle C area;

[0036] Fig.10 for Figure 8 A magnified schematic diagram of the middle D area;

[0037] Fig.11 This is a schematic diagram of the bottom structure of the upper moving plate and the lower moving plate of a preferred embodiment of the present invention (excluding the upper and lower moving cloths);

[0038] Fig.12 for Fig.11 A magnified schematic diagram of the middle E region;

[0039] Fig.13 It is a three-dimensional schematic diagram of a movable bed board mechanism without a frame in a preferred embodiment of the present invention (the movable bed board mechanism is in a state of extending forward);

[0040] Fig.14 for Fig.13 Enlarged schematic diagram of the middle F area;

[0041] Fig.15 for Fig.13 Enlarged schematic diagram of the middle G region;

[0042] Fig.16 It is a three-dimensional schematic diagram of another angle of the movable bed board mechanism without a frame in a preferred embodiment of the present invention (the movable bed board mechanism is in a state of extending forward);

[0043] Fig.17 for Fig.16 Enlarged schematic diagram of the middle H region;

[0044] Fig.18 This is a schematic diagram of the three-dimensional structure of a locking strip according to a preferred embodiment of the present invention;

[0045] Fig.19 for Fig.18 A magnified schematic diagram of the middle I region;

[0046] Fig. 20 This is a schematic diagram of the connection structure of the bed frame, the lower moving cloth and the fixing member in a preferred embodiment of the present invention;

[0047] Fig.21 This is a schematic diagram of the connection structure between the moving cloth and the fixing member in a preferred embodiment of the present invention;

[0048] Fig. 22 This is a schematic diagram of the working process of a medical transfer bed according to a preferred embodiment of the present invention;

[0049] Fig.23 This is a schematic structural diagram of the medical transfer bed in the initial state of the present invention;

[0050] In the figure: 100, movable bed plate mechanism; 1, upper movable plate; 2, upper movable cloth; 3, lower movable plate; 4, lower movable cloth; 5, locking strip; 51, upper clamping strip; 52, lower clamping strip; 53, locking switch; 531, spring seat; 532, hinge shaft; 533, eccentric cam handle; 54, limit groove; 6, movable plate driving mechanism; 61, first connecting rod shaft; 62, first main sprocket; 63, first roller chain; 64, first power output sprocket; 65, movable plate motor; 66, first outer main sprocket; 67, first slave sprocket; 68, first transmission roller chain; 69, first connecting block; 7, locking strip driving mechanism; 71, second connecting rod shaft; 72, second main sprocket; 73 , second roller chain; 74, second power output sprocket; 75, locking strip motor; 76, second outer main sprocket; 77, second slave sprocket; 78, second transmission roller chain; 79, second connecting block; 8, sliding plate; 9, small roller; 10, guide roller; 11, rigid limit strip; 12, fixing piece; 121, fixing seat; 1211, through groove; 122, rigid fastening strip; 1221, groove; 13, wave pattern; 200, vehicle body; 21, base; 22, vehicle frame; 221, long strip notch; 23, lifting bracket; 24, universal caster; 25, brake pedal; 26, lifting motor; 27, telescopic rod; a, horizontal direction; b, longitudinal direction; Z, initial position. DETAILED DESCRIPTION

[0051] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0052] Example 1

[0053] Embodiment 1 is one of the preferred embodiments of the present invention. Figure 1-23 As shown, the medical transport bed of this embodiment comprises a vehicle body 200 with a lifting mechanism and universal casters, and a movable bed board mechanism 100 for lateral movement to transport patients; the movable bed board mechanism is installed on a vehicle frame 22 of the vehicle body. In this embodiment, the moving direction of the movable bed board mechanism to extend and retract to transport patients is the lateral direction. Figure 1 a direction as shown; on the same plane, the direction perpendicular to the lateral movement direction is the longitudinal direction, such as Figure 1 b direction shown; Figure 1 The movable bed board mechanism is installed on the vehicle body and does not perform telescopic operation, which is the normal state of the medical transfer bed; the movable bed board mechanism is extended forward to form the front side, and the movable bed board mechanism is retracted backward to form the rear side.

[0054] The vehicle body 200 is composed of a base 21, a frame 22, and a lifting bracket 23 connected between the base and the frame. A universal caster 24 is installed below the base, and a brake pedal 25 is also provided on the guide caster and the universal caster on the rear side of the vehicle body, so that the operator can easily brake the transfer vehicle. The lifting bracket 23 is driven by a lifting motor 26 installed at the bottom of the frame and a telescopic rod 27 connected between the lifting motor and the lifting bracket to complete the lifting action. The left and right ends of the frame are vehicle end frames, and the front and rear sides of the frame are equipped with reversible guardrails (not shown in the figure). A wire is also drawn out from the rear side of the frame, and the end of the wire is connected to a handheld controller (not shown in the figure) for controlling the actions of each motor on the medical patient transfer vehicle.

[0055] like Figure 3-5 As shown, the movable bed board mechanism 100 includes an upper movable plate 1, an upper movable cloth 2, a lower movable plate 3, and a lower movable cloth 4; the lower movable plate is arranged below the upper movable plate, and is driven by a movable plate driving mechanism 6 to synchronously move forward or backward laterally; the upper movable cloth is coated on the outer periphery of the upper movable plate, and a locking strip 5 is longitudinally fixed to the upper movable cloth, and the locking strip is locked by a locking strip driving mechanism 7 on the pick-up and delivery side of the upper movable cloth or moves with the upper movable cloth after being unlocked; the lower movable cloth is coated on the outer periphery of the lower movable plate, and both ends of the lower movable cloth are fixed on the frame of the vehicle body and are located on the pick-up and delivery side of the lower movable plate.

[0056] Preferably, the two ends of the lower moving cloth can be fixed in a variety of ways, and can be fixed in an integral manner, such as fixing it to the bottom of the frame of the vehicle body with a clamping piece or fixing it to the bottom of the frame of the vehicle body with a riveting method, that is, this method is suitable for the lower moving cloth to be a circular closed conveying cloth; or a split fixing method can be adopted, that is, using two fixing parts to correspond to the cloth openings at the two ends of the lower moving cloth respectively, and this method is suitable for an open conveying cloth. The fixing part is a fastener that can realize the fixing of the cloth material in the prior art, and the structure and form of the fastener are not limited.

[0057] There are two main functions of the medical transfer bed for picking up and dropping off patients, namely picking up patients and dropping off patients. Picking up patients means transferring patients from a sickbed to a medical transfer bed; dropping off patients means transferring patients from a medical transfer bed to a sickbed. No matter picking up patients or dropping off patients, two actions are required, one is to extend the upper and lower movable plates, and the other is to retract the upper and lower movable plates.

[0058] The core of the present invention is to longitudinally arrange a locking strip on the receiving and delivering side of the upper moving cloth, and fix the locking strip on the upper moving cloth, and the locking strip driving mechanism drives the locking strip to move horizontally to pull the upper moving cloth to move horizontally back and forth on the upper moving plate; when the moving bed plate mechanism needs to retract the upper and lower moving plates when receiving a patient or extends the upper and lower moving plates when delivering a patient (that is, when the upper moving plate is loaded with a patient), the locking strip is released and locked, the upper moving cloth, the upper moving plate, the lower moving plate and the patient are all relatively still, and the lower moving cloth moves relative to the lower moving plate and the upper moving cloth, but the part of the lower moving cloth that contacts the hospital bed / operating bed is still relatively still with the hospital bed / operating bed; therefore, the resistance is still relatively small, and there is no problem of rolled-up sheets. When the moving bed board mechanism needs to extend the upper and lower moving boards to receive a patient or retract the upper and lower moving boards to send a patient, the locking strip driving mechanism self-locks the locking strip and fixes the locking strip in the initial position. At this time, the upper and lower moving boards simultaneously make forward and backward lateral movements (forward lateral movement refers to the gradual insertion of the upper and lower moving boards between the patient and the hospital bed, and backward lateral movement refers to the gradual withdrawal of the upper and lower moving boards between the patient and the hospital bed), the lower moving cloth moves relative to the lower moving board, and the contact portion between the lower moving cloth and the hospital bed surface and the hospital bed surface remains relatively stationary, and the contact surface between the upper moving cloth and the lower moving cloth also remains relatively stationary, and the contact portion between the upper moving cloth and the patient and the patient also remains relatively stationary. Therefore, during the overall movement of the upper and lower moving boards, except for the relative movement between the moving cloth and the corresponding moving boards, there is no other relative movement. It can be said that there is no sliding friction such as between the moving cloth and the hospital bed surface, so the resistance is very small, and the hospital bed and the patient are relatively stationary with the moving cloth in contact with them, so it can be ensured that the moving board is smoothly inserted under the patient, and the bed sheet will not be driven. The entire pick-up and drop-off process is very smooth, with very little friction and resistance.

[0059] In general, the present invention replaces the method of driving rubber rollers to rotate the transmission cloth in the prior art by setting a locking strip and a power mechanism of the locking strip, thereby simplifying the structure of the movable bed board mechanism. No rubber rollers are required, that is, there are no problems related to rubber rollers, such as no need to adjust the tension of the cloth surface, the movement of the cloth surface, the clipping of hair, the rolling of clothes, the aging of rubber rollers that need to be replaced, the complex transmission of the clutch, collisions due to misoperation, and even medical accidents such as falling off the bed; at the same time, the present invention makes it smoother to pick up and drop off patients. Compared with the prior art, the resistance and friction in the process of picking up and dropping off patients are greatly reduced, and the movable plate can be inserted under the patient very smoothly without human intervention; there is no requirement for the friction coefficient of the movable cloth, the moving resistance is smaller, the power consumption is smaller, a smaller power drive motor can be used, the transmission is simpler, and it is more conducive to increasing the load capacity of the whole vehicle and reducing the production cost.

[0060] In this embodiment, if Figure 6-12As shown, the connection mode of the upper movable plate and the lower movable plate can be various, and it only needs to be able to realize that the upper and lower movable plates can move forward or backward synchronously. The connection mode of the upper movable plate and the lower movable plate can be directly connected together in an articulated manner through the two ends on the same side of the plate body, and the movable plate driving mechanism directly drives the two plate bodies to move laterally. It is also possible to set the end joint seat body (referring to the end joint seat body 16 of Chinese Patent 200610052776.3) at the two ends on the same side of the plate body and indirectly connect together, and the movable plate driving mechanism indirectly drives the two plate bodies to move laterally by driving the end joint seat body to move. But the above two methods adopt end point contact, and its strength is slightly weak. In the present embodiment, the sliding plate 8 is set on the same side of the plate body, which can solve the shortcoming of insufficient strength, and the sliding smoothness is high. Among them, a plurality of small rollers 9 are provided at the bottom of the sliding plate; the upper moving plate is hinged or pivoted on the top surface of the sliding plate, and the lower moving plate is hinged or pivoted on the side of the sliding plate; the length of the sliding plate matches the longitudinal length of the two plate bodies, and the width of the sliding plate plus the width of the lower moving plate matches the width of the upper moving plate, so that the upper and lower moving plates and the sliding plate form a "flat moving bed plate", and the combined structure of the upper and lower moving plates and the sliding plate can greatly reduce the thickness of the moving bed plate. The power output end of the moving plate driving mechanism is directly fixedly connected to the sliding plate, or fixedly connected through the first connecting blocks 69 fixed at both ends of the sliding plate, so as to realize power transmission and drive the upper and lower moving plates to move forward or backward synchronously.

[0061] As a preferred embodiment, the front and rear longitudinal edges of the upper moving plate and the front and rear longitudinal edges of the lower moving plate are provided with longitudinal guide rollers 10, and small rollers 9 are installed on the guide rollers. The design of the guide rollers and the small rollers can reduce the resistance when the moving cloth and the moving plate move relative to each other, making the lateral movement of the entire flat moving bed board smoother.

[0062] As a further preferred solution, the upper movable plate and / or the lower movable plate are provided with a wave pattern 13, such as Fig.10 The advantage of the wave pattern design is that it reduces the friction between the moving cloth and the moving plate. In addition, the setting of the wave pattern has a certain guiding effect on the cloth surface.

[0063] In this embodiment, if Figure 3-4 , Figure 18-19 , Figure 21-22As shown, the movable plate driving mechanism 6 includes a first connecting rod shaft 61 longitudinally arranged at the bottom of the frame of the vehicle body, a first main sprocket 62 installed in the middle of the first connecting rod shaft, a first power output sprocket 64 connected to the first main sprocket through a first roller chain 63, and a movable plate motor 65 mounted on the first power output sprocket; first sprocket assemblies are installed at both ends of the first connecting rod shaft; each group of first sprocket assemblies includes a first outer main sprocket 66, a first slave sprocket 67, and a first transmission roller chain 68; the first outer main sprocket is mounted on the first connecting rod shaft, and the first slave sprocket is respectively installed at the front end and the rear end of the frame, the first outer main sprocket and the first slave sprocket are adapted with a first transmission roller chain, and the two ends of the upper and lower movable plates are respectively fixed on the first transmission roller chain through a first connecting block 69.

[0064] In the present invention, the function of the locking strip is to fix the upper moving cloth and pull it to rotate. Therefore, any component in the prior art that can achieve the function of fixing the upper moving cloth should be included in the protection scope of the locking strip described in the present invention. For example, the locking strip can be designed to be integrated, such as a steel strip or a locking strip made of other materials, fixed under the upper moving cloth by existing fixing methods such as riveting. In addition, the locking strip can also be designed to be separate, clamping and fixing the upper moving cloth from the top and bottom. Figure 18-19 As shown, the split locking strip 5 as a preferred embodiment of the present invention includes an upper clamping strip 51, a lower clamping strip 52 arranged below the upper clamping strip, and a locking switch 53 for clamping and locking the upper clamping strip and the lower clamping strip; the upper movable cloth is arranged between the upper clamping strip and the lower clamping strip. Preferably, the locking switch 53 includes a spring (not shown in the figure), a spring seat 531, a hinge shaft 532, and an eccentric cam handle 533; the spring sleeve is arranged on the spring seat, one end of the spring abuts against the upper clamping strip, and the other end abuts against the lower clamping strip, the spring seat passes through the lower clamping strip and the upper clamping strip in turn, and extends from the surface of the upper clamping strip, and the eccentric cam handle is hinged to the top of the spring sleeve through the hinge shaft.

[0065] The advantage of using the locking strip of this embodiment is that it is highly removable, especially when the cloth surface is dirty and the upper moving cloth needs to be replaced, it only needs to flip the locking switch to loosen the upper clamping strip and the lower clamping strip to remove it.

[0066] The upper moving cloth of this embodiment is a closed annular conveying cloth, and the seams of the upper moving cloth are pressed by the upper clamping strip and the lower clamping strip. This design can prevent the cloth surface interface from cracking due to cloth surface disinfection, thereby reducing the structural strength of the upper moving cloth. The lower moving cloth of this embodiment is an open conveying cloth, which is fixed to the bottom of the vehicle body frame by two fixing parts. Preferably, as Figure 20-21As shown, the fixing parts 12 of this embodiment include two sets, each set of the fixing parts includes a fixing seat 121 and a rigid fastening strip 122; each of the fixing seats is provided with a through slot 1211 for the lower moving cloth to pass through, and the width of the rigid fastening strip is greater than the width of the through slot. In addition, two long strip notches 221 are provided on the frame of the vehicle body, and after the lower moving cloth covers the periphery of the lower moving plate, the cloth openings at both ends of the lower moving cloth respectively pass through the long strip notches of the frame and the through slots of the fixing seat, and then are respectively fixed to the rigid fastening strip and limited outside the through slots of the fixing seat. Preferably, a groove 1221 is provided on the rigid fastening strip, and after the cloth opening of the lower moving cloth is inserted into the groove, it is fixed to the rigid fastening strip by rivets.

[0067] Of course, as a preferred solution, in order to facilitate the replacement of the moving cloth and meet the needs of medical infection prevention, the upper moving cloth can be designed as an open conveying cloth; the two sides of the longitudinal opening of the upper moving cloth are respectively connected with rigid limiting strips 11, and its structure is similar to that of the rigid fastening strip 122, see Figure 20-21 The upper clamping strip and the lower clamping strip are provided with a limit groove 54, see Fig.19 ; The rigid limit strip is installed in the limit groove.

[0068] In the present invention, the main function of the locking strip driving mechanism is to lock the locking strip on the pick-up and delivery side of the upper moving cloth or to release the locking strip to allow it to move with the upper moving cloth. When the upper and lower moving plates need to be extended to pick up a patient or retracted to deliver a patient, the locking strip needs to be locked in the initial position Z (the pick-up and delivery side of the transfer bed) and does not move. At this time, the upper and lower moving plates move forward and backward laterally at the same time (forward lateral movement refers to the gradual insertion of the upper and lower moving plates between the patient and the bed, and backward lateral movement refers to the gradual withdrawal of the upper and lower moving plates between the patient and the bed) to achieve the function of picking up or delivering patients. In this embodiment, if Figure 3-4 , Fig.18 , Figure 20-22 As shown, the locking strip driving mechanism adopts a motor self-locking locking locking strip, and the locking strip driving mechanism 7 includes a second connecting rod shaft 71 longitudinally arranged at the bottom of the frame of the vehicle body, a second main sprocket 72 installed in the middle of the second connecting rod shaft, a second power output sprocket 74 connected to the second main sprocket through a second roller chain 73, and a locking strip motor 75 sleeved on the second power output sprocket; both ends of the second connecting rod shaft are installed with a second sprocket assembly; each set of second sprocket assemblies includes a second outer main sprocket 76, a second slave sprocket 77, and a second transmission roller chain 78; the second outer main sprocket is sleeved on the second connecting rod shaft, and the second slave sprocket is respectively installed at the front and rear ends of the frame, and the second outer main sprocket and the second slave sprocket are adapted with a second transmission roller chain, and the two ends of the locking strip are respectively fixed on the second transmission roller chain through a second connecting block 79. This locking strip driving mechanism controls the locking and releasing locking functions of the locking strip through a motor alone.

[0069] As a further preferred solution, the first transmission roller chain 68 and the second transmission roller chain 78 are parallel to each other; the first slave sprocket of the moving plate driving mechanism and the second slave sprocket of the locking strip driving mechanism are arranged on the same connecting rod through a bearing sleeve. This design can save the installation space of the two transmission devices of the locking strip driving mechanism and the moving plate driving mechanism, and is more suitable for the transportation process of the transfer bed.

[0070] The working process of the medical transfer bed in the preferred embodiment of the present invention is as follows:

[0071] like Figure 22-23 As shown, the initial state of the medical transport bed before transporting patients is that the movable bed board mechanism is parked on the frame of the vehicle body, and the right side of the medical transport bed is an operating bed or a hospital bed; the locking strip of the movable bed board mechanism is locked on the transport side of the upper movable board, and the fixing piece is fixed on the frame;

[0072] (1) The process of extending the upper and lower moving plates when receiving a patient: the locking bar motor of the locking bar driving mechanism is self-locked, the motor does not rotate, and the second transmission roller chain is also stationary, fixing the locking bar at the initial position. At this time, the upper moving plate and the lower moving plate are driven by the moving plate driving mechanism to move forward horizontally, and the lower moving cloth moves relative to the lower moving plate, while the contact portion of the lower moving cloth with the bed surface remains relatively stationary, and the contact surface of the upper moving cloth with the lower moving cloth also remains relatively stationary, and the contact portion of the upper moving cloth with the patient and the patient also remains relatively stationary. Therefore, during the overall movement of the upper and lower moving plates, there is no other relative movement except the relative movement between the moving cloth and the corresponding moving plate; that is to say, there is no sliding friction between the moving cloth and the operating bed or the bed surface, and between the patient and the upper moving cloth, so the resistance is very small, and the contact surface between the bed sheet or disposable mattress on the bed and the lower moving cloth is relatively static, so it can be ensured that the moving plate can be smoothly inserted under the patient, and the bed sheet or disposable mattress will not be driven, and the patient will not be pushed; the patient can be connected to the upper moving bed without human intervention;

[0073] (2) The process of retracting the upper and lower moving plates when receiving a patient: After the upper moving plate is loaded with the patient, the locking bar motor rotates, and through the linkage action of the second connecting rod shaft, the second outer main sprockets on both sides of the moving bed plate mechanism on the longitudinal direction are synchronously driven to rotate. At this time, the locking bar fixed on the second transmission roller chain is pulled and relatively moved, and the locking bar is transferred to the side away from the receiving side; when the moving bed driving mechanism drives the upper and lower moving plates to retract backward in a lateral direction, the locking bar moves synchronously with the upper moving plate, and the cloth surface of the upper moving cloth is stationary relative to the upper moving plate; that is, the upper moving cloth, the upper moving plate, the lower moving plate and the patient are all relatively stationary, and the lower moving cloth moves relative to the lower moving plate and the upper moving cloth, but the part of the lower moving cloth that contacts the hospital bed / operating bed and the hospital bed / operating bed is still relatively stationary;

[0074] (3) The process of extending the upper and lower moving plates when transporting a patient: the patient is transferred to the medical transfer bed, that is, the upper moving plate is still loaded with the patient, and the moving bed driving mechanism drives the upper and lower moving plates to extend forward laterally; since the locking bar motor is still rotating, the locking bar moves synchronously with the upper moving plate; at this time, the upper moving cloth, the upper moving plate, the lower moving plate and the patient are all relatively stationary, and the lower moving cloth moves relative to the lower moving plate and the upper moving cloth, but the part of the lower moving cloth that contacts the bed / operating bed and the bed / operating bed is still relatively stationary;

[0075] (4) The process of retracting the upper and lower moving plates when transporting the patient: When the patient is transported to the top of the hospital bed / operating bed, the locking bar motor of the locking bar driving mechanism is self-locked, the motor does not rotate, and the second transmission roller chain is also stationary, fixing the locking bar in the initial position. At this time, the upper and lower moving plates are driven by the moving plate driving mechanism to move horizontally backward, and the lower moving cloth moves relative to the lower moving plate, while the contact portion of the lower moving cloth with the hospital bed / operating bed and the bed surface remains relatively still, and the contact surface of the upper moving cloth with the lower moving cloth also remains relatively still, and the contact portion of the upper moving cloth with the patient and the patient also remains relatively still. Therefore, during the overall movement of the upper and lower moving plates, except for the relative movement between the moving cloth and the corresponding moving plate, there is no other relative movement, and one transfer is completed.

[0076] Example 2

[0077] Compared with the first embodiment, the medical transport bed of the second embodiment is different in the locking strip driving mechanism. In the present embodiment, the locking strip driving mechanism adopts one of the existing locking mechanisms such as a ratchet, a structure similar to the ratchet principle, a brake mechanism, or an electromagnetic device. When the locking mechanism such as the ratchet or the electromagnetic device is unlocked (i.e. the upper moving plate is loaded with a patient), since the patient is pressed on the upper moving cloth, the friction between the upper moving cloth and the upper moving plate is large enough to overcome the friction generated by the passive movement of the lower moving cloth, resulting in the upper moving cloth, the patient and the upper moving plate being relatively stationary.

[0078] The working process of the medical transfer bed in the preferred embodiment of the present invention is as follows:

[0079] like Figure 22-23 As shown, the initial state of the medical transport bed before transporting patients is that the movable bed board mechanism is parked on the frame of the vehicle body, and the right side of the medical transport bed is an operating bed or a hospital bed; the locking strip of the movable bed board mechanism is locked on the transport side of the upper movable board, and the fixing piece is fixed on the frame;

[0080] (1) The process of extending the upper and lower movable plates when receiving a patient: the locking strip driving mechanism (such as a ratchet or electromagnetic device, etc.) self-locks the locking strip and fixes the locking strip in the initial position. At this time, the upper movable plate and the lower movable plate are driven by the movable plate driving mechanism to move forward horizontally, and the lower movable cloth moves relative to the lower movable plate, while the contact portion of the lower movable cloth with the bed surface and the bed surface remain relatively still, and the contact surface between the upper movable cloth and the lower movable cloth also remains relatively still, and the contact portion of the upper movable cloth with the patient and the patient also remains relatively still. Therefore, during the overall movement of the upper and lower movable plates, except for the relative movement between the movable cloth and the corresponding movable plate, there is no other relative movement; that is, there is no sliding friction between the movable cloth and the operating bed or bed surface, and between the patient and the upper movable cloth, so the resistance is very small, and the contact surface between the bed sheet or disposable mattress on the bed and the lower movable cloth is relatively still, so it can be ensured that the movable plate is smoothly inserted under the patient, and the bed sheet or disposable mattress will not be driven, and the patient will not be pushed; without human intervention, the patient can be connected to the upper movable bed;

[0081] (2) The process of retracting the upper and lower moving plates when receiving a patient: After the upper moving plate is loaded with the patient, the ratchet is released and locked, and the moving bed driving mechanism drives the upper and lower moving plates to retract horizontally backward; under normal circumstances, because the patient is pressed on the upper moving cloth, the friction between the upper moving cloth and the upper moving plate is large enough to overcome the friction caused by the passive movement of the lower moving cloth, resulting in the upper moving cloth and the upper moving plate being relatively stationary, and the locking strip is moved to the side away from the receiving side; at this time, the upper moving cloth, the upper moving plate, the lower moving plate and the patient are all relatively stationary, and the lower moving cloth moves relative to the lower moving plate and the upper moving cloth, but the part of the lower moving cloth that contacts the hospital bed / operating bed and the hospital bed / operating bed is still relatively stationary;

[0082] (3) The process of extending the upper and lower movable plates when transporting a patient: the patient is transferred to the medical transport bed, that is, the upper movable plate is still loaded with the patient, the ratchet is still unlocked, and the movable bed driving mechanism drives the upper and lower movable plates to extend forward laterally; because the patient is still pressed on the upper movable cloth, the friction between the upper movable cloth and the upper movable plate is large enough to overcome the friction generated by the passive movement of the lower movable cloth, resulting in the upper movable cloth and the upper movable plate being relatively still; at this time, the upper movable cloth, the upper movable plate, the lower movable plate and the patient are all relatively still, and the lower movable cloth moves relative to the lower movable plate and the upper movable cloth, but the part of the lower movable cloth in contact with the hospital bed / operating bed and the hospital bed / operating bed is still relatively still;

[0083] In steps (2)-(3), for thin and light patients, even if the patient presses on the upper moving cloth, the friction force generated is small and insufficient to overcome the friction generated by the passive movement of the lower moving cloth, which may lead to the movement of the lower moving cloth. Therefore, in order to avoid this situation, in steps (2)-(3), a clutch is added to achieve synchronous movement of the moving plate and the locking strip to ensure that the upper moving cloth does not move; and compared with the two driving mechanisms of embodiment 1, power is consumed only when the ratchet and clutch states are switched, and its power consumption is reduced, while in embodiment 1, the locking strip motor consumes power during the entire process (2)-(3).

[0084] (4) The process of retracting the upper and lower movable plates when transporting the patient: When the patient is transported to the top of the hospital bed / operating bed, the ratchet locks the locking strip. At this time, the upper and lower movable plates are driven by the movable plate driving mechanism to move horizontally backward, and the lower movable cloth moves relative to the lower movable plate, while the contact portion between the lower movable cloth and the hospital bed / operating bed and the bed surface remains relatively still, and the contact surface between the upper movable cloth and the lower movable cloth also remains relatively still, and the contact portion between the upper movable cloth and the patient and the patient also remains relatively still. Therefore, during the overall movement of the upper and lower movable plates, except for the relative movement between the movable cloth and the corresponding movable plate, there is no other relative movement, and one transfer is completed.

[0085] Example 3

[0086] In the prior art, the upper and lower moving cloths are both closed circular conveying cloths, and once installed, they cannot be disassembled and replaced with new ones, and can only be disinfected with alcohol. Therefore, if the disinfection is not sufficient, cross infection is likely to occur. It can be seen that the moving cloth of the existing medical transfer bed cannot be disassembled and cleaned, and it is difficult to achieve the purpose of complete infection prevention. Therefore, this embodiment 3 provides a medical transfer bed with an easy-to-replace moving cloth. The difference of this medical transfer bed is that the upper moving cloth and / or the lower moving cloth are designed in an open form, which can meet the needs of disassembly and replacement and achieve the purpose of infection prevention.

[0087] Specifically, compared with Example 1, the medical transfer bed of Example 3 is different in that the upper movable cloth is provided with a longitudinal opening; rigid limit strips 11 are respectively connected to both sides of the longitudinal opening of the upper movable cloth; a limit groove is provided between the upper clamping strip and the lower clamping strip; and the rigid limit strip is installed in the limit groove.

[0088] The two ends of the lower moving cloth are preferably fixed to the bottom of the frame of the vehicle body by two fixing members to fix the two ends of the lower moving cloth respectively. Figure 20-21 As shown, the fixing parts 12 of this embodiment include two sets, and each set of the fixing parts includes a fixing seat 121 and a rigid fastening strip 122; each of the fixing seats is provided with a through slot 1211 for the lower moving cloth to pass through, and the width of the rigid fastening strip is greater than the width of the through slot. In addition, two long strip notches 221 are provided on the frame of the vehicle body. After the lower moving cloth covers the periphery of the lower moving plate, the cloth openings at both ends of the lower moving cloth respectively pass through the long strip notches of the frame and the through slots of the fixing seat in turn, and then are respectively fixed to the rigid fastening strip, and are limited outside the through slots of the fixing seat. Preferably, a groove 1221 is provided on the rigid fastening strip, and after the cloth opening of the lower moving cloth is inserted into the groove, it is fixed to the rigid fastening strip by rivets. As a further preferred embodiment, each set of the fixing parts can also be arranged in sections, such as Fig.21 As shown, in this embodiment, it is divided into three sections, but it can also be divided into two sections. The advantage of the segmented fixing member is that it improves the rigidity of the vehicle body frame.

[0089] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A medical transfer bed, comprising a vehicle body with a lifting mechanism and universal casters, and a movable bed plate mechanism for lateral movement to pick up and transport patients; the movable bed plate mechanism is installed on the frame of the vehicle body; characterized in that: The movable bed plate mechanism comprises an upper movable plate, an upper movable cloth, a lower movable plate and a lower movable cloth; the lower movable plate is arranged below the upper movable plate, and the upper movable plate and the lower movable plate move forward or backward synchronously and laterally; the upper movable cloth is coated on the outer periphery of the upper movable plate, and a locking strip is longitudinally fixed to the upper movable cloth, and the locking strip is locked on the pick-up and delivery side of the upper movable cloth or moves with the upper movable cloth after being released; the lower movable cloth is coated on the outer periphery of the lower movable plate, and the two ends of the lower movable cloth are fixed on the frame of the vehicle body and are located on the pick-up and delivery side of the lower movable plate; The locking strip is locked by a locking strip driving mechanism at the pick-up and delivery side of the upper moving cloth or moves with the upper moving cloth after being unlocked; the locking strip driving mechanism comprises a second connecting rod shaft longitudinally arranged at the bottom of the frame of the vehicle body, a second main sprocket installed in the middle of the second connecting rod shaft, a second power output sprocket connected to the second main sprocket through a second roller chain, and a locking strip motor sleeved on the second power output sprocket; a second sprocket assembly is installed at both ends of the second connecting rod shaft; each group of second sprocket assemblies comprises a second outer main sprocket, a second slave sprocket, and a second transmission roller chain; the second outer main sprocket is sleeved on the second connecting rod shaft, and the second slave sprocket is respectively installed at the front end and the rear end of the frame, the second outer main sprocket and the second slave sprocket are respectively equipped with a second transmission roller chain, and the two ends of the locking strip are respectively fixed on the second transmission roller chain through a second connecting block.

2. The medical transfer bed according to claim 1, characterized in that: The upper moving cloth is a circular closed conveying cloth.

3. The medical transfer bed according to claim 1, characterized in that: The upper moving cloth and / or the lower moving cloth are provided with longitudinal openings.

4. The medical transfer bed according to any one of claims 1 to 3, characterized in that: It also includes fixing pieces for fixing the cloth openings at both ends of the lower moving cloth.

5. The medical transfer bed according to claim 2 or 3, characterized in that: The locking strip is one-piece or split; the split locking strip includes an upper clamping strip, a lower clamping strip arranged below the upper clamping strip, and a locking switch for clamping and locking the upper clamping strip and the lower clamping strip; the upper movable cloth is arranged between the upper clamping strip and the lower clamping strip.

6. The medical transfer bed according to claim 5, characterized in that: The locking switch includes a spring, a spring seat, a hinge shaft, and an eccentric cam handle; the spring sleeve is arranged on the spring seat, the spring seat passes through the lower clamping strip and the upper clamping strip in sequence, and extends out from the surface of the upper clamping strip, and the eccentric cam handle is hinged to the top of the spring sleeve through the hinge shaft.

7. The medical transfer bed according to claim 1, characterized in that: The upper movable plate and / or the lower movable plate are provided with wave patterns.

8. The medical transfer bed according to claim 1, characterized in that: The upper movable plate and the lower movable plate are driven by the movable plate driving mechanism to synchronously move forward or backward laterally. The movable plate driving mechanism includes a first connecting rod shaft longitudinally arranged at the bottom of the frame of the vehicle body, a first main sprocket installed in the middle of the first connecting rod shaft, a first power output sprocket connected to the first main sprocket through a first roller chain, and a movable plate motor sleeved on the first power output sprocket; first sprocket assemblies are installed at both ends of the first connecting rod shaft; each group of first sprocket assemblies includes a first outer main sprocket, a first slave sprocket, and a first transmission roller chain; the first outer main sprocket is sleeved on the first connecting rod shaft, and the first slave sprocket is respectively installed at the front end and the rear end of the frame; the first outer main sprocket and the first slave sprocket are adapted with the first transmission roller chain, and the two ends of the upper and lower movable plates are respectively fixed on the first transmission roller chain through a first connecting block.

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