Ambulance Stretcher System

Abstract

The present invention relates to a bed system for an ambulance comprising a transfer bed (100) for transferring a patient and a base (200) on which the transfer bed is placed. The transfer bed (100) comprises a main frame (110) on which a mattress (M) is placed, a first leg frame (120) rotatably connected to a lower side of one side of the main frame (110) and composed of a pair of first legs (121) that are folded or unfolded on the main frame (110) and a first connecting bar (122) connecting the lower ends of the first legs (121), a first caster (130) for movement that supports the pair of first legs (121), and a first folding support bar (140) that connects the front side of the main frame (110) and the first connecting bar (122) and causes the first leg frame (120) to be folded on the main frame (110) or maintains an unfolded state. It is characterized by including a second leg frame (150) composed of a pair of second legs (151) that are rotatably connected to the lower side of the main frame (110) and are folded or unfolded on the main frame (110), and a second connecting bar (152) that connects the lower ends of the second legs (151); a second caster (160) for movement that supports the pair of second legs (151); and a second folding support bar (170) that connects the main frame (110) and the second connecting bar (152) between the first leg frame (120) and the second leg frame (150), thereby allowing the second leg frame (150) to be folded on the main frame (110) or maintained in an unfolded state.

Description

Technology Field

[0001] The present invention relates to a bed system for an ambulance, and more specifically, to a bed system for an ambulance that can quickly load a patient into an ambulance and reduce pain by dampening vibrations and shocks applied to the patient during transport. Background Technology

[0002] Generally, an ambulance bed system is a special piece of equipment designed to safely and quickly transport a patient to a hospital. It consists of a transport bed that can be adjusted in height to be upright or flattened for transporting the patient, and a base installed in the ambulance on which the flattened transport bed rests.

[0003] With this bed system, in the event of an emergency, the transport bed was taken out of the ambulance, unfolded upright, moved to the emergency location, and the patient was laid on it. Afterward, the transport bed that had been moved to the ambulance was folded flat, placed on the base, and transported to the hospital.

[0004] Meanwhile, since the transport bed is very heavy, weighing about 40 to 50 kg, the total weight with the patient seated on the transport bed was at least 100 kg.

[0005] However, in emergency situations, it is very important to transport the patient to the hospital quickly, but since the weight of the transport bed with the patient on it is over 100 kg, multiple people were required to flatten it to load it onto the ambulance, and a lot of time was wasted.

[0006] In addition, while the ambulance is transporting the patient to the hospital, vibrations or shocks from the road surface are transmitted to the patient through the base and the transport bed, causing the patient great pain and, in severe cases, even life-threatening situations. Prior art related to this is disclosed in Registered Utility Model Publication No. 20-0268435 under the name "Improved Stretcher." The problem to be solved

[0007] The present invention was created to solve the above-mentioned problems and provides an ambulance bed system that can quickly load a transport bed with a patient on it into an ambulance, thereby minimizing the waste of the golden time.

[0008] Another objective of the present invention is to provide an ambulance bed system that can minimize the transmission of vibrations or shocks to the patient through the ground when the transport bed is loaded onto an ambulance and moved.

[0009] Another objective of the present invention is to provide an ambulance bed system that can minimize the transmission of vibration shocks applied through the ground to the patient when the patient is transported lying on the transport bed. means of solving the problem

[0010] To achieve the above objectives, the ambulance bed system according to the present invention comprises a transport bed (100) whose height is adjustable so that it can be loaded onto an ambulance (E) for transporting a patient, and a base (200) installed in the ambulance (E) on which the flattened transport bed (100) rests. In the ambulance bed system, the transport bed (100) comprises a main frame (110) on which a mattress (M) rests, a first leg frame (120) composed of a pair of first legs (121) rotatably connected to the lower side of one side of the main frame (110) and which are stacked or unfolded on the main frame (110), and a first connecting bar (122) connecting the lower ends of the first legs (121), a first caster (130) for movement that supports the pair of first legs (121), and the front side of the main frame (110) and the A first folding support bar (140) that connects between the first connecting bars (122) and allows the first leg frame (120) to be overlapped or maintained in an unfolded state on the main frame (110); a second leg frame (150) composed of a pair of second legs (151) that are rotatably connected to the lower side of the main frame (110) and overlap or unfold on the main frame (110), and a second connecting bar (152) that connects the lower ends of the second legs (151); a second caster (160) for movement that supports the pair of second legs (151); and a mechanism that connects between the main frame (110) and the second connecting bar (152) between the first leg frame (120) and the second leg frame (150) and allows the second leg frame (150) to be overlapped or maintained in an unfolded state on the main frame (110). It is characterized by including a second folding support bar (170).

[0011] In the present invention, a fixed damper part (300) is further included, which is installed between the ambulance and the transport bed (100) to dampen the vibration shock applied to the transport bed (100) through the ambulance.

[0012] In the present invention, the fixed damper part (300) comprises a frame rod (310) protruding from the lower front side of the main frame (110), a cap block (320) fixed to the floor (E) of the ambulance and having a fitting hole (321) formed therein into which the frame rod (310) is fitted on the upper side, a damper head (330) installed so as to be vertically movable inside the cap block (320) and supporting the lower end of the frame rod (310) fitted into the fitting hole (321), and an elastic part (340) that elastically supports the damper head (330) on the upper side inside the cap block (320).

[0013] In the present invention, the transfer bed (100) further includes a moving damper part (400) installed on the first and second leg frames (120) (150) of the transfer bed (100) to dampen vibration shock applied to the transfer bed (100) through the ground during patient transfer.

[0014] In the present invention, the movable damper part (400) comprises: a damper part body (410) coupled to the first and second legs (121) (151) of the first and second leg frames (120) (150), having a downwardly open lifting fitting groove (411) formed and an inner mounting end (412) formed at the bottom; and a tubular support end (420) positioned on the upper side of the first and second casters (130) (160) and fitted so as to be vertically movable into the lifting fitting groove (411), having a mounting groove (422) formed on its outer surface to mount the mounting end (412). It includes a main spring (430) that is sandwiched between the damper body (410) and the tubular support end (420) inside the lifting groove (411) and absorbs vibration shocks generated from the first and second casters (130) (160).

[0015] In the present invention, the apparatus further includes a damper (440) installed inside the main spring (430) to absorb vibration shock generated when the first and second casters (130) (160) pass over an uneven surface, wherein the damper (440) comprises a damper housing (441) in which viscous oil is contained and which is connected to the upper end of the lifting groove (411) inside the main spring (430), a housing cap (442) that is sealedly coupled to one side of the damper housing (441), an operating rod (443) that is connected to the tubular support end (420) inside the main spring (430) and is slidably coupled to the through hole (442a) of the housing cap (442) to move in and out of the damper housing (441), and the operating rod (443) inside the damper housing (441). It includes a mounting nut (444) fixed at the end, a rod fixing plate (445) fixed to an operating rod (443) on the side of the housing cap (442) within the damper housing (441), a damper piston (446) slidably coupled to the operating rod (443) between the mounting nut (444) and the rod fixing plate (445) and having first and second oil holes (446a, 446a') (446b) (446b') formed therein through which the oil enters and exits while resisting, and a damper spring (447) installed between the rod fixing plate (445) and the damper piston (446). Effects of the invention

[0016] According to the present invention, the transfer bed (100) comprises first and second leg frames (120) (150) that are stacked on or unfolded on a main frame (110), a first folding support bar (140) connected between the front side of the main frame (110) and a first connecting bar (122) to allow the first leg frame (120) to be stacked on the main frame (110) or maintained in an unfolded state, and a second folding support bar (170) connected between the main frame (110) and a second connecting bar (152) between the first leg frame (120) and the second leg frame (150) to allow the second leg frame (150) to be stacked on the main frame (110) or maintained in an unfolded state, thereby allowing the first and second leg frames (120) (150) to be stacked on the main frame (110) by pushing the transfer bed (100) on which the patient is seated from the rear side of the ambulance. There is, and accordingly, the transport bed (100) can be quickly loaded into the ambulance, thereby minimizing the waste of golden time.

[0017] In addition, by employing a fixed damper unit (300) installed between the ambulance and the transport bed (100), vibration shocks applied to the transport bed (100) through the ambulance while the ambulance is transporting the patient can be dampened, thereby alleviating the patient's pain.

[0018] And by installing a moving damper part (400) on each of the first and second leg frames (120) (150), the transmission of vibration shock through the ground to the patient during the process of laying the patient on the transfer bed (100) can be reduced, and accordingly, the suffering of the patient being transferred due to vibration shock can be minimized. Brief explanation of the drawing

[0019] FIG. 1 is a perspective view of an ambulance bed system according to the present invention. FIG. 2 is a perspective view showing the transfer bed of FIG. 1 extracted. FIG. 3 is a side view of the transfer bed of FIG. 2, FIG. 4 is a perspective view illustrating the state in which the transport bed of FIG. 2 is stacked flat so that it can be loaded onto an ambulance. FIG. 5 is a drawing for explaining the configuration of a fixed damper unit installed between the ambulance and the transport bed of FIG. 1, by extracting it. FIG. 6 is a diagram for explaining the operation of the fixed damper part of FIG. 5. FIG. 7 is a drawing for explaining another embodiment of the fixed damper part of FIG. 5, FIG. 8 is a drawing for explaining a movable damper unit installed on the transfer bed of FIG. 1. FIG. 9 is a diagram illustrating a general vibration damping operation performed in the moving damper section of FIG. 8. FIG. 10 is a diagram illustrating the vibration damping operation when a sudden shock is applied to the movable damper part of FIG. 8. Specific details for implementing the invention

[0020] Hereinafter, an ambulance bed system according to the present invention will be described in detail with reference to the attached drawings.

[0021] In the following, terms designated as "upper" or "upper" may include not only those directly above in contact but also those above non-contact. Terms such as "first," "second," etc., may be used to describe various components, but the components should not be limited by these terms. Terms are used solely for the purpose of distinguishing one component from another. A singular expression includes a plural expression unless the context clearly indicates otherwise. Furthermore, when a part is described as "comprising" a component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, terms such as "...part," "module," etc., as used in the specification refer to a unit that performs at least one function or operation.

[0022] FIG. 1 is a perspective view of an ambulance bed system according to the present invention, FIG. 2 is a perspective view showing a portion of the transport bed of FIG. 1, FIG. 3 is a side view of the transport bed of FIG. 2, and FIG. 4 is a perspective view to explain the state in which the transport bed of FIG. 2 is stacked flat so that it can be loaded into an ambulance.

[0023] The ambulance bed system according to the present invention is characterized by comprising: a transport bed (100) whose height is adjustable so that it can be loaded onto an ambulance for transporting a patient; and a base (200) installed in an ambulance (E) on which the flattened transport bed (100) is placed.

[0024] The transfer bed (100) comprises a main frame (110) on which a mattress (M) is placed, a first leg frame (120) composed of a pair of first legs (121) rotatably connected to the lower side of one side of the main frame (110) to be folded or unfolded on the main frame (110) and a first connecting bar (122) connecting the lower ends of the first legs (121), a first caster (130) for movement that supports the pair of first legs (121), a first folding support bar (140) that connects the front side of the main frame (110) and the first connecting bar (122) to allow the first leg frame (120) to be folded or unfolded on the main frame (110), a pair of second legs (151) rotatably connected to the lower side of the other side of the main frame (110) to be folded or unfolded on the main frame (110), and It includes a second leg frame (150) composed of a second connecting bar (152) connecting the lower part of the second leg (151), a second caster (160) for movement that supports a pair of second legs (151), and a second folding support bar (170) that connects the main frame (110) between the first leg frame (120) and the second leg frame (150) and the second connecting bar (152), thereby allowing the second leg frame (150) to be folded over the main frame (110) or maintained in an unfolded state.

[0025] The main frame (110) is a structure that forms the frame of the transport bed (100) and maintains its shape so as not to twist or bend during transport, thereby safely protecting the patient. A mattress (M) on which the patient can lie is installed on the main frame (110), and on the sides, side rails (111) are installed to prevent the transported patient from falling, safety belts (112) are installed to secure the chest, waist, and legs to prevent shaking or falling of the patient during transport, and a stand (not shown) for hanging an IV drip is installed. Since this main frame (110) is a common configuration in the industry, further detailed description is omitted.

[0026] The mattress is made of a waterproof material that is easy to wash and disinfect, so that it is not easily contaminated by bodily fluids or contaminants generated by the patient.

[0027] The first leg frame (120) is rotatably connected to one side of the main frame (110) and, when placed on the bottom of the main frame (110), flattens the shape of the transport bed (100) so that it can be loaded onto an ambulance (E).

[0028] The first caster (130) supports a pair of first legs (121) so that they can rotate 360°, allowing the transfer bed (100) to move in any direction.

[0029] As shown in FIGS. 2 and 3, the first folding support bar (140) is composed of a pair of first lower bars (141) rotatably connected to the first connecting bar (122) and a first upper bar (142) rotatably connected to the rear side of the main frame (110) while hinged to the end of the first lower bar (141). These first lower bars (141) and first upper bars (142) allow the first leg frame (120) to remain upright from the main frame (110) when unfolded, and allow the first leg frame (120) to be folded over the main frame (110).

[0030] The second leg frame (150) is rotatably connected to the other side of the main frame (110) and, when placed on the bottom of the main frame (110), flattens the shape of the transport bed (100) so that it can be loaded onto an ambulance (E).

[0031] The second caster (160) supports a pair of second legs (151) so that they can rotate 360˚, allowing the transfer bed (100) to move in any direction.

[0032] As shown in FIGS. 2 and 3, the second folding support bar (170) is composed of a pair of second lower bars (171) rotatably connected to the second connecting bar (152) and a second upper bar (172) rotatably connected to the main frame (110) between the first leg frame (120) and the second leg frame (150) while hinged to the end of the second lower bar (171). These second lower bars (171) and second upper bars (172) allow the second leg frame (150) to remain upright from the main frame (110) when unfolded, and allow the second leg frame (150) to be folded over the main frame (110).

[0033] As illustrated in FIG. 1, the base (200) is configured to prevent the transport bed (100) from moving to the left or right within a narrow ambulance, thereby allowing medical personnel to secure a treatment space. It includes a guide frame (210) fixed to the floor of the ambulance and a slide platform (220) rotatably installed on the rear side of the guide frame (210). Since this base (200) is a common configuration in the industry, further detailed description is omitted.

[0034] The slide platform (220) is rotatably installed on the rear side of the base frame (210), so that when rotated and unfolded, it protrudes toward the rear side of the ambulance to guide the transfer bed (100) on which the patient is seated into the interior of the ambulance, and when rotated and erected, it fixes the position so that the transfer bed (100) does not move.

[0035] FIG. 5 is a drawing for explaining the configuration of a fixed damper unit installed between the ambulance and the transport bed of FIG. 1, FIG. 6 is a drawing for explaining the operation of the fixed damper unit of FIG. 5, and FIG. 7 is a drawing for explaining another embodiment of the fixed damper unit of FIG. 5.

[0036] The ambulance bed system of the present invention further includes a fixed damper unit (300) installed between the ambulance and the transport bed (100) to dampen vibration shocks applied to the transport bed (100) through the ambulance.

[0037] The fixed damper section (300) includes a frame rod (310) protruding from the lower front side of the main frame (110), a cap block (320) fixed to the floor of the ambulance (E) and having a fitting hole (321) formed therein into which the frame rod (310) is fitted, a damper head (330) installed to be vertically movable inside the cap block (320) and having the lower end of the frame rod (310) fitted into the fitting hole (321) supported, and an elastic section (340) that elastically supports the damper head (330) upward from inside the cap block (320).

[0038] The frame rod (310) is installed so as to protrude from the lower surface of the main frame (110) corresponding to the patient's head side.

[0039] The cap block (320) is bolted to the floor of the ambulance corresponding to the frame rod (310).

[0040] The damper head (330) is installed so as to be vertically movable inside the cap block (320) and supports the lower end of the frame rod (310) that is fitted into the fitting hole (321).

[0041] The elastic member (340) elastically supports the frame rod (310) supported by the damper head (330) upward. This elastic member (340) is a spring installed between the bottom of the cap block (320) and the damper head (330), as shown in FIGS. 5 and 6. However, the elastic member (340) may be a common one formed inside the damper head (330), as shown in FIG. 7.

[0042] delete

[0043] FIG. 8 is a drawing for explaining a movable damper unit installed on the transfer bed of FIG. 1, FIG. 9 is a drawing for explaining a general vibration damping operation performed by the movable damper unit of FIG. 8, and FIG. 10 is a drawing for explaining a vibration damping operation when a sudden shock is applied to the movable damper unit of FIG. 8.

[0044] The ambulance bed system of the present invention further includes a movable damper part (400) that is installed on the first and second leg frames (120) (150) of the transport bed (100) and dampens vibration shock applied to the transport bed (100) through the ground during patient transport.

[0045] The moving damper unit (400) is installed between the first and second legs (121)(151) and the first and second casters (130)(160) to dampen vibration shocks applied through the ground during the process of transporting a patient to an ambulance so that they are not transmitted to the patient.

[0046] As shown in FIG. 8, the movable damper unit (400) is coupled to the first and second legs (121) (151) and comprises: a damper unit body (410) having a downwardly open lifting fitting groove (411) and an inner mounting end (412) formed at the bottom; a tubular support end (420) positioned on the upper side of the first and second casters (130) (160) and fitted so as to be vertically movable into the lifting fitting groove (411), having a mounting groove (422) formed on its outer surface to mount the mounting end (412); and a main spring (430) fitted between the damper unit body (410) and the tubular support end (420) inside the lifting fitting groove (411) to absorb vibration shocks generated from the first and second casters (130) (160). It includes a damper (440) installed inside the main spring (430) to absorb vibration shock generated when the first and second casters (130) (160) pass over a severely uneven surface.

[0047] The main spring (430) absorbs vibration shocks applied from the ground when the transport bed (100) transporting the patient moves over a normal ground, thereby reducing pain applied to the patient being transported.

[0048] As shown in FIGS. 9 and 10, the damper (440) comprises: a damper housing (441) in which viscous oil is contained and which is connected to the upper end of the lifting groove (411) inside the main spring (430); a housing cap (442) which is sealedly coupled to one side of the damper housing (441); an operating rod (443) which is connected to the tubular support end (420) inside the main spring (430) and is slidably coupled to the through hole (442a) of the housing cap (442) to move in and out of the damper housing (441); a mounting nut (444) which is fixed to the end of the operating rod (443) inside the damper housing (441); and a rod fixing plate (445) which is fixed to the operating rod (443) on the housing cap (442) side inside the damper housing (441). It includes a damper piston (446) that is slidably coupled to an operating rod (443) between a mounting nut (444) and a rod fixing plate (445) and has first and second oil holes (446a, 446a') (446b) (446b') formed therein through which the oil enters and exits while resisting, and a damper spring (447) installed between the rod fixing plate (445) and the damper piston (446).

[0049] The housing cap (442) has an annular shape, and a sealing member is installed in the housing cap through hole (442a) to ensure a secure seal with the outer surface of the operating rod (443).

[0050] In the damper piston (446), a first hole (446a, 446a') and a second hole (446b, 446b') are formed through which oil having a predetermined viscosity enters and exits. The first hole (446a, 446a') and the second hole (446b, 446b') are holes formed in an alternating manner with a small predetermined diameter, so that the oil flows only in a certain amount while receiving resistance. That is, when the damper piston (446) moves upward from the inside of the damper housing (441), the oil passes through the first hole 446a → the first hole 446a', and when the damper piston (446) moves downward, the oil passes through the second hole 446b' → the second hole 446b.

[0051] A sealing (446c) is installed on the outer surface of the damper piston (446) to be in close contact with the inner surface of the damper housing (441) during transport.

[0052] The damper spring (447) is installed between the damper piston (446) and the rod fixing plate (445) and maintains a constant gap between the damper piston (446) and the rod fixing plate (445) when the operating rod (443) moves smoothly into the damper housing (441). However, when a strong impact (force) is applied to the operating rod (443) instantaneously and it moves rapidly into the damper housing (441), the damper spring (447) is instantaneously compressed, causing the gap between the damper piston (446) and the rod fixing plate (445) to narrow. The elastic modulus of this damper spring (447) is greater than the elastic modulus of the main spring (430).

[0053] The operation of the main spring (430) and damper (440) is described as follows.

[0054] When the first and second casters (130) (160) pass over a gentle slope while the transfer bed (100) carries the patient, as shown in FIG. 9, the tubular support member (420) rises inside the lifting groove (411) of the damper body (410), compressing the main spring (430) sandwiched between the damper body (410) and the tubular support member (420), and the operating rod (443) supported by the tubular support member (420) is pushed into the inside of the damper housing (441), causing the damper piston (446) to move into the inside of the damper housing (441). Then, the oil moves toward the damper spring (447) through the first hole (446a) → first hole (446a'). At this time, the oil has viscosity and moves in a constant amount through the first holes (446a, 446a'), so the damper piston (446) and the operating rod (443) are gradually immersed into the damper housing (441).

[0055] When the transfer bed (100) completely crosses the embankment, the main spring (430) expands due to its own elasticity, and in this process, the operating rod (443) retracts and protrudes from the damper housing (441). Then, the damper piston (446) coupled to the operating rod (443) moves in the opposite direction, and in this process, the oil on the damper spring (447) side moves through the second hole (446b') → second hole (446b). At this time, since the oil has viscosity and moves in a constant amount through the second hole (446b') (446b), the damper piston (446) and the operating rod (443) eventually protrude slowly from the damper housing (441).

[0056] Afterwards, the main spring (430) attempts to be compressed again by its own elasticity, and the force generated during compression causes the damper piston (446) and the operating rod (443) to be immersed into the damper housing (441). In this process, the elastic force transmitted to the damper piston (446) is gradually absorbed by the oil moving through the first and second holes, and thus the main spring (430) immediately returns to its initial state, so that no residual vibration is applied to the first and second legs (121) (151).

[0057] Meanwhile, when the transfer bed (100) moves quickly or passes over protrusions on the ground, a large impact is applied to the first and second casters (130) (160) for a very short time, and this impact is applied in a direction that causes the operating rod (443) to be immersed into the damper housing (441) instantaneously.

[0058] However, since the oil itself has viscosity, a certain amount of time is required while passing through the first and second holes (446a, 446a') (446b, 446b'), and accordingly, the movement of the damper piston (446) is suppressed by the oil for a short time. However, the above impact causes the operating rod (443) to be immersed into the damper housing (441) for a short time, and since the damper piston (446) is in a stationary state within the oil, as shown in FIG. 10, the operating rod (443) passes through the damper piston (446) and is immersed into the damper housing (441) while compressing the damper spring (447). That is, the damper piston (446) does not move, and only the operating rod (443) moves when compressing the damper spring (447). This is possible because the elastic modulus of the damper spring (447) is greater than that of the main spring (430).

[0059] That is, when a gentle vibration is applied to the moving transfer bed (100) by means of the main spring (430) and the damper (440), as shown in the figure, the damper spring (447) is not compressed and moves together with the damper piston (446) and the operating rod (443) to absorb the vibration, and when a sudden shock is applied to the transfer bed (100), as shown in the figure, the damper piston (446) does not move and the damper spring (447) is compressed to absorb the shock. Therefore, even if the transfer bed moves in any environment such as a gentle bump or a puddle, the vibration or shock transmitted to the patient can be reduced, so the patient can be prevented from suffering pain due to the vibration or shock.

[0060] Thus, according to the present invention, a transfer bed (100) comprises first and second leg frames (120) (150) that are stacked on or unfolded on a main frame (110), a first folding support bar (140) connected between the front side of the main frame (110) and a first connecting bar (122) to allow the first leg frame (120) to be stacked on the main frame (110) or maintained in an unfolded state, and a second folding support bar (170) connected between the main frame (110) and a second connecting bar (152) between the first leg frame (120) and the second leg frame (150) to allow the second leg frame (150) to be stacked on the main frame (110) or maintained in an unfolded state, thereby allowing the first and second leg frames (120) (150) to be placed on the main frame (110) by pushing the transfer bed (100) on which the patient is seated from the rear side of the ambulance. It can be stacked, and accordingly, the transport bed (100) can be quickly loaded into an ambulance, thereby minimizing the waste of golden time.

[0061] In addition, by employing a fixed damper unit (300) installed between the ambulance and the transport bed (100), vibration shocks applied to the transport bed (100) through the ambulance while the ambulance is transporting the patient can be dampened, thereby alleviating the patient's pain.

[0062] And by installing a moving damper part (400) on each of the first and second leg frames (120) (150), the transmission of vibration shock through the ground to the patient during the process of laying the patient on the transfer bed (100) can be reduced, and accordingly, the suffering of the patient being transferred due to vibration shock can be minimized.

[0063] The present invention has been described with reference to one embodiment illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Explanation of the symbols

[0064] 100 ... transfer bed 110 ... main frame 111 ... side rail 112 ... seat belt 120 ... 1st leg frame 121 ,.. 1st leg 122 ... 1st connecting bar 130 ... 1st caster 140 ... 1st folding support bar 141 ... 1st lower bar 142 ... 1st upper bar 150 ... 2nd leg frame 151 ... 2nd bridge 152 ... 2nd connecting bar 160 ... 2nd caster 170 ... 2nd folding support bar 171 ... 2nd lower bar 172 ... 2nd upper bar 200 ... Base 210 ... Guide Frame 220 ... slide platform 300 ... fixed damper section 310 ... Frame Load 320 ... Cap Block 321 ... insertion hole 330 ... damper head 340 ... elastic section 400 ... movable damper section 410 ... damper body 411 ... elevator fitting groove 412 ... mounting section 420 ... tubular support section 422 ... mounting groove 430 ... mainspring 440 ... damper 441 ... damper housing 442 ... Housing cap 442a ... Through hole 443 ... operating rod 444 ... mounting nut 445 ... rod fixing plate 446 ... damper piston 446a, 446a' ... 1st oil hole 446b, 446b' ... 2nd oil hole 446c ... sealing 447 ... damper spring

Claims

Claim 1 An ambulance bed system comprising a height-adjustable transfer bed (100) for transporting a patient so as to be loaded onto an ambulance (E), and a base (200) installed on the ambulance (E) on which the flattened transfer bed (100) rests, wherein the transfer bed (100) comprises a main frame (110) on which a mattress (M) rests, a first leg frame (120) composed of a pair of first legs (121) rotatably connected to the lower side of one side of the main frame (110) so as to be folded or unfolded on the main frame (110), and a first connecting bar (122) connecting the lower ends of the first legs (121), a first caster (130) for movement that supports the pair of first legs (121), and a connecting bar (122) that connects the front side of the main frame (110) and the first connecting bar (122). It includes a first folding support bar (140) that causes the first leg frame (120) to be folded or maintained in an unfolded state on the main frame (110), a second leg frame (150) composed of a pair of second legs (151) that are rotatably connected to the lower side of the main frame (110) and are folded or unfolded on the main frame (110), and a second connecting bar (152) that connects the lower ends of the second legs (151), a second caster (160) for movement that supports the pair of second legs (151), and a second folding support bar (170) that connects the main frame (110) and the second connecting bar (152) between the first leg frame (120) and the second leg frame (150) and causes the second leg frame (150) to be folded or maintained in an unfolded state on the main frame (110). It further includes a fixed damper unit (300) installed between the ambulance and the transport bed (100) to dampen vibration shocks applied to the transport bed (100) through the ambulance, wherein the fixed damper unit (300) comprises a frame rod (310) protruding from the lower front side of the main frame (110) corresponding to the patient's head side, andThe device comprises a cap block (320) fixed to the floor (E) of the ambulance and having a fitting hole (321) formed therein for detachably fitting the frame rod (310) toward the upper side, a damper head (330) installed vertically inside the cap block (320) and supporting the lower end of the frame rod (310) fitted into the fitting hole (321), and an elastic part (340) that elastically supports the damper head (330) toward the upper side inside the cap block (320), and further comprises a movable damper part (400) installed on the first leg frame (120) and the second leg frame (150) of the transfer bed (100) to dampen vibration shock applied to the transfer bed (100) through the ground during patient transfer, wherein the movable damper part (400) is of the first leg frame (120). A damper body (410) composed of a lifting fitting groove (411) that is open downward and formed to be coupled to the first leg (121) and the second leg (151) of the second leg frame (150), and a mounting end (412) formed to protrude inwardly at the bottom of the lifting fitting groove (411); a tubular support end (420) positioned on the upper side of the first caster (130) and the second caster (160) and fitted so as to be vertically movable into the lifting fitting groove (411), with a mounting groove (422) formed on its outer surface for mounting the mounting end (412); and a main spring (430) fitted between the damper body (410) and the tubular support end (420) inside the lifting fitting groove (411) to absorb vibration shocks generated from the first and second casters (130) (160); It includes a damper (440) installed inside the main spring (430) to absorb vibration shock generated when the first and second casters (130) (160) pass over an uneven surface; wherein the damper (440) comprises a damper housing (441) connected to the upper end of the lifting groove (411) inside the main spring (430) and containing viscous oil, and a housing cap (442) sealedly coupled to one side of the damper housing (441).An operating rod (443) connected to the tubular support end (420) inside the main spring (430) and slidably coupled to the through hole (442a) of the housing cap (442) to move in and out of the damper housing (441); a mounting nut (444) fixed to the end of the operating rod (443) inside the damper housing (441); a rod fixing plate (445) fixed to the operating rod (443) on the housing cap (442) side inside the damper housing (441); a damper piston (446) slidably coupled to the operating rod (443) between the mounting nut (444) and the rod fixing plate (445), having a first oil hole (446a, 446a') and a second oil hole (446b) (446b') formed therein through which the oil enters and exits while resisting; and the An ambulance bed system characterized by including a damper spring (447) installed between a load fixing plate (445) and a damper piston (446). Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete

Images