First-aid transfer accompanying equipment fixing structure and medical wheel stretcher

Abstract

The invention discloses a first-aid transfer accompanying equipment fixing structure which comprises a bottom plate, four side positioning assemblies and two side plates distributed on the left side and the right side of the bottom plate are arranged on the bottom plate, and locking and unlocking mechanisms are arranged at the upper ends of the two side plates correspondingly. The locking and unlocking mechanism can limit the up-down position of the first-aid transfer accompanying equipment which is positioned in the bottom plate placement area by the four-side positioning assembly so as to quickly lock and fix the first-aid transfer accompanying equipment to the bottom plate, and can quickly unlock the first-aid transfer accompanying equipment so that the first-aid transfer accompanying equipment can be taken away from the bottom plate. The invention further discloses a medical wheel stretcher which comprises a wheel stretcher body, and the first-aid transfer accompanying equipment fixing structure is installed on the wheel stretcher body. The stretcher has the advantages that the first-aid transfer accompanying equipment can be quickly locked, fixed and unlocked, so that the first-aid transfer accompanying equipment cannot shake on the stretcher in the transfer process along with the stretcher and a critical patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical emergency equipment, and in particular to an emergency transport accompanying equipment fixing structure and a medical stretcher which can effectively lock and fix the emergency transport accompanying equipment during the emergency transport process and can quickly unlock the locked emergency transport accompanying equipment so that the emergency transport accompanying equipment can be taken away. Background Art

[0002] During the emergency transfer of critically ill patients, emergency transfer accompanying equipment is required to ensure the stability of the patient's vital signs and the safety of the transfer. Emergency transfer accompanying equipment includes: ventilator, ECG monitor, defibrillator, infusion pump, baby warmer, emergency transfer accompanying equipment, etc.

[0003] At present, in the process of emergency transfer of critically ill patients on medical stretchers, the emergency transfer accompanying equipment is generally placed directly on the bed surface in the stretcher for the patient to lie on. Since the emergency transfer accompanying equipment is not fixed in any position during the transfer process, it is easy for the emergency transfer accompanying equipment to shake on the stretcher during the transfer process, resulting in the risk of related connecting pipes of the emergency transfer accompanying equipment loosening and falling off, or the emergency transfer accompanying equipment falling from the stretcher, which is not conducive to the safe transfer of patients. Summary of the invention

[0004] The first purpose of the present invention is to provide an emergency transport accompanying equipment fixing structure which can effectively lock and fix the emergency transport accompanying equipment during the emergency transport process to prevent the emergency transport accompanying equipment from shaking on the stretcher, and can quickly unlock the locked emergency transport accompanying equipment so that the emergency transport accompanying equipment can be taken away.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fixing structure of an emergency transport accompanying equipment, comprising a bottom plate for being installed on a stretcher, a placement area for placing the emergency transport accompanying equipment is arranged on the bottom plate, and four-side positioning components are arranged on the bottom plate, and the four-side positioning components can limit the front, rear, left and right positions of the emergency transport accompanying equipment on the bottom plate to position the emergency transport accompanying equipment in the placement area of ​​the bottom plate; two side plates distributed on the left and right sides of the placement area are vertically installed on the bottom plate, and locking and unlocking mechanisms are respectively arranged at the upper ends of the two side plates, and the locking and unlocking mechanisms can limit the upper and lower positions of the emergency transport accompanying equipment positioned in the placement area of ​​the bottom plate by the four-side positioning components to quickly lock and fix the emergency transport accompanying equipment to the bottom plate, and can quickly unlock the emergency transport accompanying equipment so that the emergency transport accompanying equipment can be taken away from the bottom plate; The structure of the locking and unlocking mechanism at the upper end of each side panel comprises: a shell body fixed to the upper end of the corresponding side panel, a locking portion entrance and exit communicating with the interior of the shell body is arranged on the shell body side panel close to the placement area of ​​the left and right shell body side panels of the shell body, a pressing block is arranged inside the shell body, and the pressing block can only be installed inside the shell body in a left-right translational direction relative to the shell body through a first guide mechanism, a locking portion penetrating the locking portion entrance and exit is arranged on the side wall of the pressing block, the height of the locking portion and the pressing block can ensure that when the pressing block is translated in the left-right direction until the locking portion extends out of the locking portion entrance and exit, it can be located directly above the emergency transport accompanying equipment placed in the placement area, an upper guide surface is arranged on the upper side of the locking portion to facilitate the smooth downward placement of the emergency transport accompanying equipment into the bottom plate placement area, and a A lower guide surface is provided to facilitate smooth upward removal of the emergency transfer accompanying device from the bottom plate placement area. A locking hole is provided at the top of the pressing block. A first elastic mechanism is provided between the pressing block and the shell. The first elastic mechanism enables the pressing block to always have a tendency to translate in the left and right directions to the locking portion and extend from the locking portion entrance and exit to above the emergency transfer accompanying device placed in the placement area to limit the upper and lower positions of the emergency transfer accompanying device. A support plate is fixed inside the shell above the pressing block. A guide hole is provided in the support plate that passes through the support plate from top to bottom. When the pressing block translates to the locking portion under the action of the first elastic mechanism and extends from the locking portion entrance and exit to above the emergency transfer accompanying device placed in the placement area to limit and lock the emergency transfer accompanying device, the locking hole of the pressing block just corresponds to the guide hole of the support plate upwards. A mounting opening connected to the interior of the shell is provided at the top of the shell, the locking and unlocking block is provided in the mounting opening and can only be installed on the shell in translation relative to the shell through a second guide mechanism, the locking and unlocking block can be moved to a locking position or an unlocking position in the mounting opening through the second guide mechanism, a toggle button located outside the shell is fixed on the top of the locking and unlocking block, a rising notch for inserting the guide block is provided at one end of the bottom of the locking and unlocking block, the bottom of the locking and unlocking block adjacent to the rising notch is a flat end surface, and the bottom surface of the rising notch smoothly transitions to the bottom of the locking and unlocking block through a guiding inclined surface. The guide block and the lock pin are arranged below the locking and unlocking block, the guide block is installed at the upper end of the lock pin, the lower end of the lock pin is inserted downward into the guide hole of the support plate, and a second elastic mechanism is connected between the lock pin and the support plate, the second elastic mechanism makes the lock pin always have the tendency to move upward to disengage from the locking hole of the pressure block and makes the guide block always press upward to contact the locking and unlocking block; when the locking and unlocking block is in the unlocking position, the rising notch of the locking and unlocking block just corresponds to the guide block downward, and when the locking and unlocking block is in the locking position, the bottom flat end surface of the locking and unlocking block just corresponds to the guide block downward; When the locking and unlocking block is in the unlocking position, the guide block and the locking pin will move together to the corresponding upward rising notch under the upward elastic force of the second elastic mechanism, so that the locking pin will be disengaged from the locking hole of the pressing block to unlock the pressing block, so that the pressing block is in an unlocking state that is convenient for the emergency transport accompanying equipment to be placed downward into the bottom plate placement area or taken upward from the bottom plate placement area; When the first aid transport accompanying device is placed downwardly in the bottom plate placement area and the pressing block is translated to the locking portion under the action of the first elastic mechanism, it extends from the locking portion entrance and exit to above the first aid transport accompanying device placed in the placement area to limit the upper and lower positions of the first aid transport accompanying device. The lock unlocking block is driven to move from the unlocking position to the locking position by toggling the button. During the movement of the lock unlocking block from the unlocking position to the locking position, the lock unlocking block gradually pushes the guide block and the locking pin downward together through the guiding inclined surface so that the locking pin is gradually inserted into the locking hole of the pressing block. When the lock unlocking block moves to the locking position, the locking pin is just inserted into the locking hole of the pressing block and at this time the lock unlocking block just moves to the bottom flat end surface thereof, pressing down and contacting the guide block so that the lock pin cannot move upward and remains in the locked state of being inserted downward into the locking hole of the pressing block, thereby making the pressing block maintain its locking portion extending from the locking portion entrance and exit to above the first aid transport accompanying device placed in the placement area to limit the first aid transport accompanying device to the locked state.

[0006] Furthermore, in the aforementioned fixing structure of an emergency transport accompanying device, a positioning mechanism is provided between the locking and unlocking block and the shell, and the positioning mechanism can assist in positioning the locking and unlocking block moved to a locking position or an unlocking position.

[0007] Furthermore, the aforementioned fixing structure of an emergency transport accompanying equipment, wherein: the structure of the positioning mechanism includes: a ball-end screw is arranged on the side wall of the locking and unlocking block, the positioning bead on the head of the ball-end screw extends out of the corresponding side wall of the locking and unlocking block, and a hemispherical groove in the unlocking position and a hemispherical groove in the locking position are arranged on the inner wall of the shell body opposite to the side wall of the corresponding locking and unlocking block where the ball-end screw is installed, and the positions of the hemispherical groove in the unlocking position and the hemispherical groove in the locking position can ensure that when the locking and unlocking block moves to the locking position, the positioning bead of the ball-end screw on the locking and unlocking block is just inserted into the corresponding hemispherical groove in the locking position, and when the locking and unlocking block moves to the unlocking position, the positioning bead of the ball-end screw on the locking and unlocking block is just inserted into the corresponding hemispherical groove in the unlocking position.

[0008] Furthermore, the aforementioned emergency transport accompanying equipment fixing structure, wherein: the four-side positioning components include: a plurality of blocks are respectively arranged on the bottom plate on the front, rear, left and right sides of the placement area, and the blocks cooperate to position the emergency transport accompanying equipment in the bottom plate placement area.

[0009] Furthermore, in the aforementioned fixing structure of the emergency transport accompanying equipment, a slope inclined from top to bottom toward the placement area is respectively provided on the top of each block.

[0010] Further, for the above-mentioned fixing structure of the first-aid transfer accompanying equipment, wherein: the structure of the first guiding mechanism includes: a guiding hole is respectively arranged at each of the four corners of the pressing block, and four guiding columns are arranged on the inner wall of the housing side plate closer to the placement area among the left and right housing side plates of the housing. Each guiding column is arranged in the left-right direction. The four guiding columns on the inner wall of the housing side plate correspond to the four guiding holes at the four corners of the pressing block one by one. The four guiding holes of the pressing block are respectively sleeved on the corresponding guiding columns on the inner wall of the housing side plate, and the pressing block is installed inside the housing in a manner that can only translate relative to the housing along the left-right direction through the cooperation of the guiding holes and the guiding columns.

[0011] Further, for the above-mentioned fixing structure of the first-aid transfer accompanying equipment, wherein: the structure of the first elastic mechanism includes: each guiding hole of the pressing block is a stepped hole. The large-diameter end of the stepped hole is arranged at the end face of the pressing block far from the placement area, and the small-diameter end is arranged at the end face of the pressing block close to the placement area. A first spring is sleeved outside each guiding column. One end of each first spring abuts against the housing side plate far from the placement area in the housing, and the other end abuts against the step surface of the corresponding guiding hole. Each first spring makes the pressing block always have a tendency to translate along the left-right direction until the locking part extends out from the entrance and exit of the locking part to above the first-aid transfer accompanying equipment placed in the placement area to limit the up-and-down position of the first-aid transfer accompanying equipment.

[0012] Further, for the above-mentioned fixing structure of the first-aid transfer accompanying equipment, wherein: the structure of the second guiding mechanism includes: a front-to-back sliding groove is respectively arranged on the left and right side walls of the locking and unlocking block, and two guide bars symmetrically arranged on the left and right sides of the locking and unlocking block are fixed inside the housing at the installation opening. Each guide bar is arranged in the front-to-back direction, and the two guide bars are respectively slidably embedded in the sliding grooves on both sides of the locking and unlocking block. The locking and unlocking block can only move back and forth relative to the housing in the installation opening through the limiting cooperation of the sliding grooves and the guide bars.

[0013] Further, for the above-mentioned fixing structure of the first-aid transfer accompanying equipment, wherein: a front positioning stop block fixed to the inner wall of the housing is arranged in front of the locking and unlocking block, and a rear positioning stop block fixed to the inner wall of the housing is arranged behind the locking and unlocking block. When the locking and unlocking block moves forward to the locking position, the locking and unlocking block just abuts against the front positioning stop block. When the locking and unlocking block moves backward to the unlocking position, the locking and unlocking block just abuts against the rear positioning stop block.

[0014] Further, for the above-mentioned fixing structure of the first-aid transfer accompanying equipment, wherein: a plurality of shock-absorbing pads for supporting the first-aid transfer accompanying equipment and a plurality of positioning columns that are inserted and positioned in cooperation with the positioning holes at the bottom of the first-aid transfer accompanying equipment are arranged on the bottom plate where the placement area is located.

[0015] Furthermore, the aforementioned fixing structure of an emergency transport accompanying equipment, wherein: the structure of the second elastic mechanism includes: a positioning boss is fixed on the outer wall of the locking pin below the guide block, a second spring is arranged between the positioning boss and the support plate, the second spring is sleeved on the locking pin, the upper end of the second spring abuts against the positioning boss, the lower end of the second spring abuts against the support plate, and the second spring enables the locking pin to always have a tendency to move upward to disengage from the locking hole of the pressure block and enables the guide block to always press upward to tightly contact the locking and unlocking block.

[0016] The second object of the present invention is to provide a medical stretcher that can effectively lock and fix the emergency transport accompanying equipment during the emergency transport process to prevent the emergency transport accompanying equipment from shaking on the stretcher, and can quickly unlock the locked emergency transport accompanying equipment so that the emergency transport accompanying equipment can be taken away.

[0017] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a medical stretcher comprises a stretcher body, on which a fixing structure of emergency transport accompanying equipment is installed.

[0018] Through the implementation of the above technical scheme, the beneficial effects of the present invention are: (1) the emergency transport accompanying device can be quickly locked and fixed, so that the emergency transport accompanying device will not shake on the stretcher during the transportation process with the medical stretcher, effectively avoiding the loosening and falling of related connecting pipes and the falling of the emergency transport accompanying device from the stretcher caused by the shaking of the emergency transport accompanying device, which is conducive to the safe transportation of patients and is suitable for the use conditions of the emergency transport accompanying device; (2) when the emergency transport accompanying device needs to be taken away, the emergency transport accompanying device can be quickly unlocked, and the locking and unlocking operations are very convenient; (3) the emergency transport accompanying device is installed inside the fixed structure of the emergency transport accompanying device, and the fixed structure of the emergency transport accompanying device can protect the emergency transport accompanying device to avoid direct collision with other equipment during the transportation process, further protect the emergency transport accompanying device, and is suitable for the use conditions of the emergency transport accompanying device, which is conducive to the safe transportation of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a fixing structure of an emergency transport accompanying device according to the present invention.

[0020] Figure 2 for Figure 1 Left view of .

[0021] Figure 3 for Figure 1 Top view of the .

[0022] Figure 4 for Figure 1 AA section view shown in .

[0023] Figure 5 is Figure 4 an enlarged schematic view of part B shown in

[0024] Figure 6 is Figure 1 a perspective view of

[0025] Figure 7 a schematic perspective view of the locking and unlocking mechanism

[0026] Figure 8 a schematic perspective view of the housing in the locking and unlocking mechanism

[0027] Figure 9 a schematic view of the structure of the housing with the outer side plate of the housing removed

[0028] Figure 10 a schematic view of the structure of the outer side plate of the housing in the housing

[0029] Figure 11 a schematic view of the structure of the locking and unlocking block

[0030] Figure 12 is Figure 11 the left view of

[0031] Figure 13 is Figure 11 a perspective view of

[0032] Figure 14 a perspective view of the pressing block

[0033] Figure 15 a schematic perspective view of the guide block connected to the locking pin

[0034] Figure 16 a schematic view of the structure of the locking and unlocking mechanism with the outer side plate of the housing removed

[0035] Figure 17 is Figure 2 a schematic view of the structure of the locking and unlocking mechanism shown in

[0036] Figure 18 is Figure 17 a schematic view of the structure of the C-C section shown in

[0037] Figure 19 a schematic view of the structure of the locking and unlocking block installed with a ball screw

[0038] Figure 20 a schematic view of the structure when the ECMO host is locked and fixed by the fixing structure of an emergency transport accompanying device described in the present invention

[0039] Figure 21 isFigure 20 Stereogram.

[0040] Figure 22 It is a stereogram of an ECMO mainframe.

[0041] Figure 23 It is a schematic diagram of the three-dimensional structure of the medical stretcher cart described in the present invention. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] Such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 20 , Figure 21 , Figure 22As shown, a fixing structure 600 for an emergency transfer accompanying device includes a bottom plate 1. An installation area for placing the emergency transfer accompanying device 100 is provided on the bottom plate 1. A four-side positioning component is arranged on the bottom plate 1. The four-side positioning component can limit the front, rear, left, and right positions of the emergency transfer accompanying device 100 on the bottom plate 1 to position the emergency transfer accompanying device 100 in the installation area of the bottom plate 1. In this embodiment, the four-side positioning component includes: a number of stoppers 2 are respectively arranged on the front, rear, left, and right sides of the bottom plate 1 in the installation area. Each stopper 2 cooperates to limit the front, rear, left, and right positions of the emergency transfer accompanying device 100 on the bottom plate 1, thereby positioning the emergency transfer accompanying device 100 in the installation area of the bottom plate 1, so that the emergency transfer accompanying device 100 can only be placed into or taken out from the installation area of the bottom plate in the up and down directions; in this embodiment, an inclined surface 211 inclined downward from top to bottom towards the installation area is respectively arranged on the top of each stopper 2. In this way, during the process of the emergency transfer accompanying device 100 being placed downward into the installation area, when the emergency transfer accompanying device 100 has a certain position deviation in any of the front, rear, left, and right directions and the emergency transfer accompanying device 100 is not completely aligned downward with the installation area of the bottom plate 1, during the downward movement of the emergency transfer accompanying device 100 in the state of not being completely aligned with the installation area, the emergency transfer accompanying device 100 will first contact the inclined surface 211 of the stopper 2. At this time, the inclined surface 211 of the stopper 2 in contact with the emergency transfer accompanying device 100 will automatically guide and center the emergency transfer accompanying device 100, guide the emergency transfer accompanying device 100 towards the installation area, and enable the emergency transfer accompanying device 100 to smoothly and accurately enter the installation area. The design of the inclined surface 211 allows a certain position deviation of the emergency transfer accompanying device 100 before placement, making the operation more convenient; in this embodiment, a number of shock-absorbing pads 25 for supporting the emergency transfer accompanying device and a number of positioning columns 26 that are inserted and positioned in cooperation with the positioning holes 200 at the bottom of the emergency transfer accompanying device 100 are arranged on the bottom plate 1 where the installation area is located.

[0044] Two side plates 3 are vertically installed on the bottom plate 1 and are distributed on the left and right sides of the installation area. Locking and unlocking mechanisms 400 are respectively arranged at the upper ends of the two side plates 3. The locking and unlocking mechanism 400 can limit the up and down position of the emergency transfer accompanying device 100 positioned in the bottom plate installation area by the four-side positioning component to quickly lock and fix the emergency transfer accompanying device 100 on the bottom plate 1, and can quickly unlock the emergency transfer accompanying device 100 so that the emergency transfer accompanying device 100 can be taken away from the bottom plate 1.

[0045] Since the structures of the locking and unlocking mechanisms 400 at the upper ends of the two side plates 3 are the same, only the structure of the locking and unlocking mechanism 400 at the upper end of one of the side plates 3 will be taken as an example for description below. As Figure 7 、 Figure 8, Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 As shown in FIG. Figure 19 , the structure of the locking and unlocking mechanism 400 includes: a housing 4 fixed to the upper end of the corresponding side plate 3. The housing 4 has an inner cavity 41. A locking part entrance and exit 7 communicating with the inner cavity 41 of the housing is provided on the housing side plate closer to the placement area among the left and right housing side plates of the housing 4. To better explain the present invention, for the left and right housing side plates of the housing 4, the housing side plate closer to the placement area is defined as the inner housing side plate 61, and the housing side plate farther from the placement area is defined as the outer housing side plate 62, that is: the locking part entrance and exit 7 is provided on the inner housing side plate 61. In this embodiment, the outer housing side plate 62 is detachably mounted on the housing 4; a pressing block 8 is provided in the inner cavity 41 of the housing 4. The pressing block 8 is mounted in the inner cavity 41 of the housing 4 so as to be translatable only in the left and right directions relative to the housing 4 through a first guiding mechanism. In this embodiment, the structure of the first guiding mechanism includes: a guiding hole 811 is respectively provided at the four corners of the pressing block 8. Four guide posts 9 are provided on the inner wall of the inner housing side plate 61 of the housing 4. Each guide post 9 is arranged in the left and right direction. The four guide posts 9 on the inner wall of the inner housing side plate 61 correspond to the four guiding holes 811 at the four corners of the pressing block 8 one by one. The four guiding holes 811 of the pressing block 8 are respectively sleeved on the corresponding guide posts 9 on the inner wall of the inner housing side plate 61. The pressing block 8 is mounted in the inner cavity 41 of the housing 4 so as to be translatable only in the left and right directions relative to the housing 4 through the cooperation of the guiding holes 811 and the guide posts 9.

[0046] A locking part 812 passing through the locking part entrance and exit 7 is provided on the side wall of the pressing block 8. The height of the locking part 812 and the pressing block 8 can ensure that when the pressing block 8 is translated in the left and right direction until the locking part 812 extends out of the locking part entrance and exit 7, it can be located directly above the emergency transport accompanying device 100 placed in the placement area. The size of the pressing block 8 is larger than the size of the locking part entrance and exit 7 on the inner housing side plate 61. An upper guiding surface 813 facilitating the smooth downward placement of the emergency transport accompanying device 100 into the bottom plate placement area is provided on the upper side of the locking part 812. In this embodiment, the upper guiding surface 813 is an inclined surface gradually inclined downward toward the placement area; a lower guiding surface 814 facilitating the smooth upward removal of the emergency transport accompanying device 100 from the bottom plate placement area is provided on the lower side of the locking part 812. In this embodiment, the lower guiding surface 814 is an arc surface adapted to the arc chamfer at the top of the corresponding side casing of the emergency transport accompanying device.

[0047] A locking hole 815 is provided at the top of the briquetting block 8. A first elastic mechanism is provided between the briquetting block 8 and the housing 4. The first elastic mechanism causes the briquetting block 8 to always have a tendency to translate in the left - right direction until the locking portion 812 extends out of the locking portion entrance - exit 7 and is placed above the first - aid transfer accompanying device 100 in the placement area to limit the up - down position of the first - aid transfer accompanying device 100. In this embodiment, the structure of the first elastic mechanism includes: each guiding hole 811 of the briquetting block 8 is a stepped hole. The large - diameter end of the stepped hole is arranged on the end face of the briquetting block away from the placement area, and the small - diameter end is arranged on the end face of the briquetting block close to the placement area. A first spring 11 is sleeved outside each guide post 9. One end of each first spring 11 abuts against the side plate 62 of the housing away from the placement area, and the other end abuts against the step surface of the corresponding guiding hole 811. Each first spring 11 causes the briquetting block 8 to always have a tendency to translate in the left - right direction towards the placement area until the locking portion 812 extends out of the locking portion entrance - exit 7 and is placed above the first - aid transfer accompanying device 100 in the placement area to limit the up - down position of the first - aid transfer accompanying device.

[0048] A support plate 10 is fixed in the inner cavity 41 of the housing 4 above the briquetting block 8. A guiding hole 101 that penetrates the support plate 10 up and down is provided in the support plate 10. When the briquetting block 8 translates under the action of the first spring 11 and abuts against the inner side plate 61 of the housing, the locking hole 815 of the briquetting block 8 is exactly upward corresponding to the guiding hole 101 of the support plate 10, and at this time, the locking portion 812 of the briquetting block 8 just extends out of the locking portion entrance - exit 7 and is placed above the first - aid transfer accompanying device 100 in the placement area to limit and lock the first - aid transfer accompanying device.

[0049] An installation opening 5 communicating with the inside is provided at the top of the housing 4. The locking and unlocking block 12 is arranged in the installation opening 5 and is installed in the housing 4 in a manner that can only translate relative to the housing through a second guiding mechanism. The locking and unlocking block 12 can move to the locking position or the unlocking position in the installation opening 5 through the second guiding mechanism. In this embodiment, the installation opening 5 is a long - strip - shaped opening in the front - rear direction. The structure of the second guiding mechanism includes: a front - rear - running sliding groove 121 is respectively provided on the left and right side walls of the locking and unlocking block 12. Two guide bars 13 symmetrically arranged on the left and right sides of the locking and unlocking block 12 are fixed inside the housing 4 at the installation opening 5. Each guide bar 13 is arranged in the front - rear direction. The two guide bars 13 are respectively slidably embedded in the sliding grooves 121 on both sides of the locking and unlocking block 12. Through the limiting cooperation between the sliding grooves 121 of the locking and unlocking block 12 and the guide bars 13, the locking and unlocking block 12 cannot move up and down relative to the housing and can only move back and forth relative to the housing 4 in the installation opening.

[0050] A toggle button 14 located outside the housing 4 is fixed to the top of the locking and unlocking block 12. An upward slot 16 into which the guiding block 15 can be inserted is provided at one end of the bottom of the locking and unlocking block 12. The bottom of the locking and unlocking block 12 adjacent to the upward slot 16 is a flat end face 122. The bottom surface 161 of the upward slot 16 smoothly transitions to the bottom flat end face 122 of the locking and unlocking block 12 through a guiding inclined surface 162. A guiding block 15 and a locking pin 17 are provided below the locking and unlocking block 12. The guiding block 15 is mounted on the upper end of the locking pin 17. The top surface 152 of the guiding block 15 is a flat end face. The side surface 153 of the guiding block near the unlocking position smoothly transitions to the top surface 152 of the guiding block 15 through an inclined surface 151 that gradually slopes upward from the unlocking position to the locking position. The inclined surface 151 is used to cooperate with the guiding inclined surface 162 of the upward slot 16 of the locking and unlocking block 12. The lower end of the locking pin 17 is inserted downward into the guiding hole 101 of the support plate 10. A second elastic mechanism is connected between the locking pin 17 and the support plate 10. The second elastic mechanism causes the locking pin 17 to always have a tendency to move upward and disengage from the locking hole 815 of the pressing block 8 and causes the guiding block 15 to always press upward and contact the locking and unlocking block 12. In this embodiment, the structure of the second elastic mechanism includes: a positioning shoulder 18 is fixed to the outer wall of the locking pin 17 below the guiding block 15. A second spring 19 is provided between the positioning shoulder 18 and the support plate 10. The second spring 19 is sleeved on the locking pin 17. The upper end of the second spring 19 abuts against the positioning shoulder 18, and the lower end of the second spring 19 abuts against the support plate 10. The second spring 19 causes the locking pin 17 to always have a tendency to move upward and disengage from the locking hole 815 of the pressing block 8 and causes the guiding block 15 to always press upward and contact the locking and unlocking block 12. When the locking and unlocking block 12 is in the unlocking position, the upward slot 16 of the locking and unlocking block 12 is exactly corresponding downward to the guiding block 15. When the locking and unlocking block 12 is in the locking position, the bottom flat end face 122 of the locking and unlocking block 12 is exactly corresponding downward to the guiding block 15.

[0051] When the locking and unlocking block 12 is in the unlocking position, the guiding block 15 and the locking pin 17 will move upward together to the corresponding upward slot 16 under the upward elastic force of the second spring 19, so that the locking pin 17 disengages from the locking hole 815 of the pressing block 8 to unlock the pressing block 8. After the pressing block 8 is unlocked, the pressing block 8 is only under the elastic force of the first spring 11. At this time, applying an external force to the emergency transport accompanying device 100 sufficient to overcome the elasticity of the first spring 11 can conveniently place the emergency transport accompanying device 100 downward into the bottom plate placement area or take it out upward from the bottom plate placement area.

[0052] When the emergency transport accompanying device 100 is placed downwardly in the placement area of ​​the bottom plate 1, and the pressing block 8 is translated to its locking portion 812 under the action of the first spring 11, extending from the locking portion entrance 7 to the lower guide surface 814 of the locking portion 812 and pressing on the top of the corresponding side casing of the emergency transport accompanying device 100, the locking and unlocking block 12 is driven to move from the unlocking position to the locking position by toggling the button 14. In the process of the locking and unlocking block 12 moving from the unlocking position to the locking position, the locking and unlocking block 12 gradually pushes the guide block 15 and the locking pin 17 to move downward together through the guiding inclined surface 162, so that the locking pin 17 is gradually inserted into the locking hole 815 of the pressing block 8. When the locking and unlocking block 12 moves to the locking position, the locking pin 17 is just inserted into the locking hole 815 of the pressing block 8 and at this time the locking and unlocking block 12 is just moved to its bottom flat end surface 122 to press down on the contact guide block 15, so that the locking pin 17 cannot move up and remains in the locked state of being inserted downward into the locking hole 815 of the pressing block, so that the pressing block 8 keeps its locking portion 812 extending from the locking portion entrance 7 and buckled on the top of the corresponding side casing of the emergency transport accompanying device 100 to limit the emergency transport accompanying device 100 to be locked in the locked state on the bottom plate 1.

[0053] In this embodiment, a positioning mechanism is provided between the locking and unlocking block 12 and the shell 4, and the positioning mechanism can assist in positioning the locking and unlocking block 12 moved to the locking position or the unlocking position, and the structure of the positioning mechanism includes: a ball screw 20 is provided on the side wall of the locking and unlocking block 12, and in this embodiment, a ball screw 20 is provided on the left and right side walls of the locking and unlocking block 12; the ball screw is a commonly used part, so its structure is not repeated here; the positioning bead at the head of each ball screw 20 extends out of the corresponding side wall of the locking and unlocking block 12, and the positioning bead of each ball screw 20 always has a tendency to protrude outward from the corresponding side wall of the locking and unlocking block 12 under the elastic force of its internal spring, and the inner wall of the inner plate 61 of the shell and the inner wall of the outer plate 62 of the shell are provided with a hemispherical groove 21 of the unlocking position and a hemispherical groove 22 of the locking position, each of which is provided with a hemispherical groove 21 of the unlocking position, and the inner wall of the inner plate 61 of the shell and the inner wall of the outer plate 62 of the shell are provided with a hemispherical groove 21 of the locking position, and the inner wall of each The positions of the locking position hemispherical groove 21 and the locking position hemispherical groove 22 can ensure that, when the locking and unlocking block 12 moves to the locking position, the positioning beads of the ball screws 20 on both sides of the locking and unlocking block 12 are just snapped into the corresponding locking position hemispherical grooves 22, and when the locking and unlocking block 12 moves to the unlocking position, the positioning beads of the ball screws 20 on both sides of the locking and unlocking block 12 are just snapped into the corresponding unlocking position hemispherical grooves 21; in this embodiment, a front positioning block 23 fixed to the inner wall of the shell is provided in front of the locking and unlocking block 12, and a rear positioning block 24 fixed to the inner wall of the shell is provided behind the locking and unlocking block 12, when the locking and unlocking block 12 moves forward to the locking position, the locking and unlocking block 12 just abuts against the front positioning block 23, and when the locking and unlocking block 12 moves backward to the unlocking position, the locking and unlocking block 12 just abuts against the rear positioning block 24.

[0054] likeFigure 23 As shown in Figure 23 , a medical stretcher cart includes a stretcher cart body 500, and a first-aid transfer accompanying equipment fixing structure 600 for installing and fixing the first-aid transfer accompanying equipment 100 is installed on the stretcher cart body 500.

[0055] Taking the ECMO host as an example of the first-aid transfer accompanying equipment, the working principle of the first-aid transfer accompanying equipment fixing structure will be described in detail as follows: In actual application, first fixedly install the bottom plate 1 of the first-aid transfer accompanying equipment fixing structure 600 on the stretcher cart body 500 of the medical stretcher cart; then place the first-aid transfer accompanying equipment 100 (ECMO host) in the first-aid transfer accompanying equipment fixing structure 600, and effectively lock and fix the first-aid transfer accompanying equipment 100 through the first-aid transfer accompanying equipment fixing structure 600, so that the first-aid transfer accompanying equipment 100 will not shake on the stretcher cart during the transfer with the stretcher cart.

[0056] The principle of locking and unlocking the first-aid transfer accompanying equipment fixing structure 600 for the first-aid transfer accompanying equipment 100 (ECMO host) is as follows: First, toggle the toggle button 14 in each locking and unlocking mechanism 400 on the first-aid transfer accompanying equipment fixing structure 600 to the unlocking position, synchronously driving the corresponding locking and unlocking block 12 to move to the unlocking position. When the locking and unlocking block 12 is in the unlocking position, the guide block 15 and the locking pin 17 will move upward to the corresponding upward notch 16 together under the upward elastic force of the second spring 19, so that the locking pin 17 disengages from the locking hole 815 of the pressing block 8 to unlock the pressing block 8. At this time, the pressing block 8 is only affected by the elastic force of the first spring 11; then align the first-aid transfer accompanying equipment 1 (ECMO host) downward with the placement area of the bottom plate and place it downward into the placement area of the bottom plate 1; during the downward movement of the first-aid transfer accompanying equipment 1 (ECMO host), the first-aid transfer accompanying equipment 1 (ECMO host) will first contact the upper guiding surface 813 of the pressing block locking part 812 of each locking and unlocking mechanism 400. As the first-aid transfer accompanying equipment 1 (ECMO host) continues to move downward, the first-aid transfer accompanying equipment 1 (ECMO host) will make the pressing blocks of each locking and unlocking mechanism 400 move into the inner cavity of the corresponding housing 4 against the elastic force of the corresponding first spring 11 through the upper guiding surface 813, that is: the pressing block 8 in the unlocked state will not prevent the first-aid transfer accompanying equipment 100 (ECMO host) from moving downward into the placement area of the bottom plate.

[0057] When the positioning holes 200 at the bottom of the first-aid transfer accompanying device 1 (ECMO main unit) are aligned downward and sleeved onto the corresponding positioning posts 26 in the placement area of the bottom plate and are completely placed on the placement area of the bottom plate 1, the pressing block 8 is exactly above the top of the corresponding side casing of the first-aid transfer accompanying device 1 (ECMO main unit). At this time, under the action of the first spring 11, the pressing block 8 will translate towards the first-aid transfer accompanying device until it abuts against the inner side plate 61 of the casing. At this time, the locking portion 812 of the pressing block 8 just extends out from the locking portion entrance and exit 7, and the lower guiding surface 814 of the locking portion 812 presses downwards on the top of the corresponding side casing of the first-aid transfer accompanying device 100 (ECMO main unit); then move the toggle button 14 of each locking and unlocking mechanism 400 from the unlocking position to the locking position, synchronously driving the locking and unlocking block 12 to move from the unlocking position to the locking position. During the process of the locking and unlocking block 12 moving from the unlocking position to the locking position, the locking and unlocking block 12 gradually pushes the guiding block 15 and the locking pin 17 to move downward together through the cooperation of the guiding inclined surface 162 and the inclined surface 151 of the guiding block 15, so that the locking pin 17 gradually inserts into the locking hole 815 of the pressing block 8. When the locking and unlocking block 12 moves to the locking position, the locking pin 17 just inserts into the locking hole 815 of the pressing block 8, and at this time, the locking and unlocking block 12 just moves to the position where its bottom flat end surface 122 corresponds to press down and contact the top flat end surface 152 of the guiding block 15, so that the locking pin 17 cannot move upward and remains in the locked state of being inserted downward into the locking hole 815 of the pressing block, so that the pressing block 8 keeps its locking portion 812 extending out from the locking portion entrance and exit 7 and pressing downwards on the top of the corresponding side casing of the first-aid transfer accompanying device 100 (ECMO main unit) to limit and lock the first-aid transfer accompanying device 100 on the bottom plate 1 (ECMO main unit), thus completing the locking and fixing of the first-aid transfer accompanying device 100 (ECMO main unit) and firmly installing the first-aid transfer accompanying device 100 (ECMO main unit) on the stretcher body 500 of the medical stretcher trolley.

[0058] When it is necessary to remove the emergency transfer accompanying device 100 (ECMO main unit) from the emergency transfer accompanying device fixing structure 600, the toggle button 14 in each locking and unlocking mechanism 400 on the emergency transfer accompanying device fixing structure 600 is toggled from the locking position to the unlocking position, synchronously driving the corresponding locking and unlocking block 12 to move from the locking position to the unlocking position. When the locking and unlocking block 12 is in the unlocking position, the upward slot 16 of the locking and unlocking block 12 exactly corresponds downward to the guide block 15. At this time, the guide block 15 and the locking pin 17 have upward movement space. Under the upward elastic force of the second spring 19, the guide block 15 and the locking pin 17 will move upward together to the corresponding upward slot 16 above, so that the locking pin 17 disengages from the locking hole 815 of the pressure block 8 to unlock the pressure block 8. At this time, the pressure block 8 is only affected by the elastic force of the first spring 11. Then, the emergency transfer accompanying device 1 (ECMO main unit) is moved upward. During the upward movement of the emergency transfer accompanying device 1 (ECMO main unit), the emergency transfer accompanying device 1 (ECMO main unit) will first contact the lower guiding surface 814 of the pressure block locking part 812 of each locking and unlocking mechanism 400. As the emergency transfer accompanying device 1 (ECMO main unit) continues to move upward, the emergency transfer accompanying device 1 will cause the pressure blocks of each locking and unlocking mechanism 400 to move toward the inner cavity 41 of the corresponding housing 4 against the elastic force of the corresponding first spring 11 through the lower guiding surface 814, that is: the pressure block 8 in the unlocked state will not prevent the emergency transfer accompanying device from moving upward and leaving the placement area on the bottom plate, until the emergency transfer accompanying device 100 is removed from the emergency transfer accompanying device fixing structure 600.

[0059] The advantages of the present invention are: (1) It can quickly lock and fix the emergency transfer accompanying device, so that the emergency transfer accompanying device will not shake on the stretcher during the transfer with the medical stretcher, effectively avoiding the occurrence of situations such as loosening and falling off of relevant connecting pipelines caused by the shaking of the emergency transfer accompanying device and the emergency transfer accompanying device falling off the stretcher, which is beneficial to the safe transfer of patients and is suitable for the use conditions of the emergency transfer accompanying device; (2) When it is necessary to remove the emergency transfer accompanying device, the emergency transfer accompanying device can be quickly unlocked, and the locking and unlocking operations are very convenient; (3) The emergency transfer accompanying device is installed inside the emergency transfer accompanying device fixing structure, and the emergency transfer accompanying device fixing structure can protect the emergency transfer accompanying device, avoiding direct collision of the emergency transfer accompanying device with other devices during the transfer, further protecting the emergency transfer accompanying device, being suitable for the use conditions of the emergency transfer accompanying device, and being beneficial to the safe transfer of patients.

Claims

1. A fixing structure for first-aid transfer accompanying equipment, characterized in that: It includes a bottom plate for installation on a stretcher trolley. An installation area for placing first-aid transfer accompanying equipment is provided on the bottom plate. Four-side positioning components are provided on the bottom plate, and the four-side positioning components can limit the front, rear, left, and right positions of the first-aid transfer accompanying equipment on the bottom plate to position the first-aid transfer accompanying equipment in the installation area of the bottom plate; Two side plates are vertically installed on the bottom plate and are distributed on the left and right sides of the installation area. Locking and unlocking mechanisms are respectively provided at the upper ends of the two side plates. The locking and unlocking mechanisms can limit the up and down positions of the first-aid transfer accompanying equipment positioned in the installation area of the bottom plate by the four-side positioning components to quickly lock and fix the first-aid transfer accompanying equipment to the bottom plate, and can quickly unlock the first-aid transfer accompanying equipment so that the first-aid transfer accompanying equipment can be taken away from the bottom plate; The structure of the locking and unlocking mechanism at the upper end of each side plate includes: a housing fixed to the upper end of the corresponding side plate. A locking part entrance and exit communicating with the inside of the housing is provided on the housing side plate closer to the installation area among the left and right housing side plates of the housing. A pressing block is provided inside the housing. The pressing block is installed inside the housing through a first guiding mechanism and can only translate relative to the housing in the left and right directions. A locking part penetrating through the locking part entrance and exit is provided on the side wall of the pressing block. The height of the locking part and the pressing block can ensure that when the pressing block translates in the left and right directions and the locking part extends out of the locking part entrance and exit, it can be located directly above the first-aid transfer accompanying equipment placed in the installation area. An upper guiding surface is provided on the upper side of the locking part to facilitate the smooth downward placement of the first-aid transfer accompanying equipment into the installation area of the bottom plate. A lower guiding surface is provided on the lower side of the locking part to facilitate the smooth upward extraction of the first-aid transfer accompanying equipment from the installation area of the bottom plate. A locking hole is provided at the top of the pressing block. A first elastic mechanism is provided between the pressing block and the housing. The first elastic mechanism makes the pressing block always have a tendency to translate in the left and right directions until the locking part extends out of the locking part entrance and exit and is located above the first-aid transfer accompanying equipment placed in the installation area to limit the up and down positions of the first-aid transfer accompanying equipment. A support plate is fixed inside the housing above the pressing block. A guide hole penetrating through the support plate up and down is provided in the support plate. When the pressing block translates under the action of the first elastic mechanism and the locking part extends out of the locking part entrance and exit and is located above the first-aid transfer accompanying equipment placed in the installation area to be able to limit and lock the first-aid transfer accompanying equipment, the locking hole of the pressing block is exactly upward corresponding to the guide hole of the support plate; An installation opening communicating with the interior of the housing is provided at the top of the housing. The locking and unlocking block is arranged in the installation opening and is installed on the housing in a manner that can only translate relative to the housing through a second guiding mechanism. The locking and unlocking block can move to a locking position or an unlocking position in the installation opening through the second guiding mechanism. A toggle button located outside the housing is fixed to the top of the locking and unlocking block. An upward slot is provided at one end of the bottom of the locking and unlocking block for the guiding block to insert. The bottom of the locking and unlocking block adjacent to the upward slot is a flat end face. The bottom surface of the upward slot is smoothly transitioned to the bottom flat end face of the locking and unlocking block through a guiding inclined surface. A guiding block and a locking pin are arranged below the locking and unlocking block. The guiding block is installed at the upper end of the locking pin. The lower end of the locking pin is inserted downward into the guiding hole of the support plate. A second elastic mechanism is connected between the locking pin and the support plate. The second elastic mechanism always makes the locking pin have a tendency to move upward and disengage from the locking hole of the pressing block and makes the guiding block always press upward against and contact the locking and unlocking block; when the locking and unlocking block is in the unlocking position, the upward slot of the locking and unlocking block just corresponds downward to the guiding block. When the locking and unlocking block is in the locking position, the bottom flat end face of the locking and unlocking block just corresponds downward to the guiding block; When the locking and unlocking block is in the unlocking position, the guiding block and the locking pin will move upward together to the corresponding upward slot under the upward elastic force of the second elastic mechanism, so that the locking pin disengages from the locking hole of the pressing block to unlock the pressing block, and the pressing block is in an unlocking state that facilitates the emergency rescue transfer accompanying equipment to be placed downward into the bottom plate placement area or taken out upward from the bottom plate placement area; When the emergency rescue transfer accompanying equipment is placed downward into the bottom plate placement area and the pressing block is translated to the locking part under the action of the first elastic mechanism and extends from the locking part entrance and exit to above the emergency rescue transfer accompanying equipment placed in the placement area to limit the up and down position of the emergency rescue transfer accompanying equipment, the locking and unlocking block is driven by the toggle button to move from the unlocking position to the locking position. During the process of the locking and unlocking block moving from the unlocking position to the locking position, the locking and unlocking block gradually pushes the guiding block and the locking pin to move downward together through the guiding inclined surface, so that the locking pin gradually inserts into the locking hole of the pressing block. When the locking and unlocking block moves to the locking position, the locking pin just inserts into the locking hole of the pressing block and at this time the locking and unlocking block just moves to press the bottom flat end face downward against the guiding block so that the locking pin cannot move upward and maintains the locking state of being inserted downward into the locking hole of the pressing block, thereby keeping the pressing block in the locking state where its locking part extends from the locking part entrance and exit to above the emergency rescue transfer accompanying equipment placed in the placement area to limit the position of the emergency rescue transfer accompanying equipment.

2. The fixed structure of a first aid transfer accompanying device according to claim 1, wherein: A positioning mechanism is provided between the locking and unlocking block and the housing. The positioning mechanism can assist in positioning the locking and unlocking block that has moved to the locking position or the unlocking position. The structure of the positioning mechanism includes: a ball screw is provided on the side wall of the locking and unlocking block, and the positioning ball at the head of the ball screw protrudes from the corresponding side wall of the locking and unlocking block. On the inner wall of the housing opposite to the corresponding side wall of the locking and unlocking block where the ball screw is installed, there are an unlocking position hemispherical groove and a locking position hemispherical groove. The positions of the unlocking position hemispherical groove and the locking position hemispherical groove can ensure that when the locking and unlocking block moves to the locking position, the positioning ball of the ball screw on the locking and unlocking block just snaps into the corresponding locking position hemispherical groove, and when the locking and unlocking block moves to the unlocking position, the positioning ball of the ball screw on the locking and unlocking block just snaps into the corresponding unlocking position hemispherical groove.

3. The fixed structure of a first-aid transfer accompanying device according to claim 1, wherein: The four-side positioning assembly includes: a number of stoppers are respectively provided on the bottom plates on the front, rear, left, and right sides of the placement area. The stoppers cooperate with each other to position the first-aid transfer accompanying equipment in the placement area of the bottom plate.

4. The fixing structure of a first aid transfer accompanying device according to claim 3, characterized in that: On the top of each stopper, there is an inclined surface that slopes downward from top to bottom towards the placement area.

5. The fixed structure of an emergency transfer accompanying device according to claim 1, characterized in that: The structure of the first guiding mechanism includes: a guiding hole is respectively provided at each of the four corners of the pressing block. On the inner wall of the housing side plate that is closer to the placement area among the left and right housing side plates of the housing, there are four guiding columns. Each guiding column is arranged in the left-right direction. The four guiding columns on the inner wall of the housing side plate correspond one by one to the four guiding holes at the four corners of the pressing block. The four guiding holes of the pressing block are respectively sleeved on the corresponding guiding columns on the inner wall of the housing side plate. The pressing block is installed inside the housing and can only translate relative to the housing in the left-right direction through the cooperation of the guiding holes and the guiding columns.

6. The fixed structure of a first aid transfer accompanying device according to claim 5, characterized in that: The structure of the first elastic mechanism includes: each guiding hole of the pressing block is a stepped hole. The large-diameter end of the stepped hole is arranged at the end face of the pressing block away from the placement area, and the small-diameter end is arranged at the end face of the pressing block close to the placement area. A first spring is sleeved outside each guiding column. One end of each first spring abuts against the housing side plate in the housing that is away from the placement area, and the other end abuts against the step surface of the corresponding guiding hole. Each first spring makes the pressing block always have a tendency to translate in the left-right direction until the locking part extends out from the locking part entrance and exit and is placed above the first-aid transfer accompanying equipment placed in the placement area, so as to limit the up-and-down position of the first-aid transfer accompanying equipment.

7. The fixed structure of an emergency transfer accompanying device according to claim 1, characterized in that: The structure of the second guiding mechanism includes: a front-to-back running sliding groove is respectively provided on the left and right side walls of the locking and unlocking block. Inside the housing at the installation opening, two guide bars are symmetrically arranged on the left and right sides of the locking and unlocking block. Each guide bar is arranged in the front-to-back direction. The two guide bars are respectively slidably embedded in the sliding grooves on both sides of the locking and unlocking block. The locking and unlocking block can only move back and forth relative to the housing in the installation opening through the limiting cooperation of the sliding grooves and the guide bars.

8. The fixed structure of a first-aid transfer accompanying device according to claim 1, characterized in that: A front positioning stopper fixed to the inner wall of the housing is provided in front of the locking and unlocking block, and a rear positioning stopper fixed to the inner wall of the housing is provided behind the locking and unlocking block. When the locking and unlocking block moves forward to the locking position, the locking and unlocking block just abuts against the front positioning stopper. When the locking and unlocking block moves backward to the unlocking position, the locking and unlocking block just abuts against the rear positioning stopper.

9. The fixing structure of a first aid transfer accompanying device according to claim 1, characterized in that: On the bottom plate where the placement area is located, there are several shock-absorbing pads for supporting the emergency transfer accompanying equipment, and several positioning columns that are inserted and positioned in cooperation with the positioning holes at the bottom of the emergency transfer accompanying equipment.

10. The fixed structure of a first-aid transfer accompanying device according to claim 1, characterized in that: The structure of the second elastic mechanism includes: a positioning shoulder is fixed on the outer wall of the locking pin below the guiding block, a second spring is arranged between the positioning shoulder and the support plate, the second spring is sleeved on the locking pin, the upper end of the second spring abuts against the positioning shoulder, the lower end of the second spring abuts against the support plate, and the second spring always makes the locking pin have a tendency to move upward to disengage from the locking hole of the pressing block and makes the guiding block always abut tightly against the locking and unlocking block upward.

11. Medical stretcher cart, characterized in that: It includes a stretcher car body, and an emergency transfer accompanying equipment fixing structure as described in any one of claims 1 to 10 is installed on the stretcher car body.

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