A folding stretcher cart

Abstract

The utility model belongs to the stretcher car technical field especially relates to a folding stretcher car, include: bed body frame assembly, bed body frame assembly includes left side bed frame, right side bed frame, middle part guide frame and bottom connecting frame, the both sides of middle part guide frame outside fixedly established connecting block, the opposite end of left side bed frame, right side bed frame is respectively articulated in two connecting block outside, linkage folding mechanism, linkage folding mechanism includes "J" type's four support columns, two middle part sliders, two cross bars and inclined struts, four support columns are respectively articulated in left side bed frame, right side bed frame's bottom end both sides. The utility model discloses linkage folding mechanism realizes the big reduction of volume, adapts ambulance, narrow rescue and so on narrow scene, resets the lock stop mechanism and guarantees the structure stable after unfolding, and the magnetic attraction locking prevents accidental loosening after folding, and adjustable backrest mattress is matched with the limiting locking of telescopic component, improves patient comfort and angle stability.

Description

Technical Field

[0001] This utility model belongs to the field of stretcher cart technology, and in particular relates to a folding stretcher cart. Background Technology

[0002] Traditional stretcher trolleys are widely used for short-distance patient transport in hospitals, ambulances, and other similar settings. Their core structure typically includes a fixed metal frame, a mattress placed on the frame, and wheels at the bottom. The fixed frame supports the patient's weight, while the wheels ensure stable movement. However, existing stretcher trolleys have several drawbacks: First, the fixed metal frame lacks a folding mechanism, meaning it cannot be folded or only partially folds, resulting in significant space requirements during transport and storage, making it difficult to adapt to the confined spaces of ambulances or narrow rescue scenarios. Second, the guardrails are often fixed structures or have complex folding operations, making storage inconvenient and lacking comprehensive four-way protection, increasing safety risks during patient transport. Third, there is no stable locking structure when folded and no reliable locking mechanism when unfolded, leading to easy loosening when folded and insufficient stability when unfolded, affecting safety during use.

[0003] There is an urgent need for improvement, so we propose a folding stretcher cart. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a folding stretcher cart. Through a linkage folding mechanism, the size is significantly reduced, making it suitable for confined spaces such as ambulances and narrow rescue operations. The reset pin locking mechanism ensures structural stability after unfolding, and the magnetic locking prevents accidental loosening after folding. Furthermore, the adjustable backrest mattress, combined with the limit locking of the telescopic components, enhances patient comfort and ensures angle stability.

[0005] In view of this, the present invention provides a folding stretcher cart, comprising: A bed frame assembly, comprising a left bed frame, a right bed frame, a middle guide frame, and a bottom connecting frame, wherein connecting blocks are fixed on both sides of the outer side of the middle guide frame, and the opposite ends of the left and right bed frames are respectively hinged to the outer sides of the two connecting blocks. The linkage folding mechanism includes four "J"-shaped support columns, two central sliders, two crossbars, and diagonal braces. The four support columns are respectively hinged to the bottom sides of the left and right bed frames. The two central sliders are respectively slidably engaged with the outer sides of the central guide frame. The two crossbars are respectively fixed between the two support columns of the left bed frame and between the two support columns of the right bed frame. The two ends of the bottom connecting frame are respectively hinged between the crossbars and the central guide frame. The two ends of the diagonal braces are respectively hinged between the central sliders and the crossbars. A locking mechanism, which is located on the middle slider, is used to lock the left bed frame and the right bed frame; A moving mechanism, located at the bottom of the supporting column, is used for moving the bed frame assembly.

[0006] Furthermore, it also includes the mattress assembly, which includes a left mattress, a right mattress and a backrest mattress. The left mattress is fixed to the upper surface of the left bed frame by hexagonal bolts, the right mattress is fixed to the upper surface of the right bed frame by hexagonal bolts, and the backrest mattress is rotatably connected to the upper surface of the right bed frame by an adjustment component.

[0007] Furthermore, the locking mechanism includes a reset pin and a first reset spring; the reset pin slides through the middle slider, and the side wall of the middle guide frame is provided with a hole corresponding to the position of the reset pin, and the outer diameter of the reset pin is adapted to the inner diameter of the hole; the first reset spring is sleeved on the rod segment of the reset pin located outside the middle slider.

[0008] Furthermore, the moving mechanism includes movable wheels fixedly installed at the bottom of the four supporting columns. The movable wheels are silent omnidirectional wheels and are equipped with brakes.

[0009] Furthermore, the adjustment assembly includes an adjustment frame and a telescopic assembly. One end of the adjustment frame is hinged to the rear end of the right bed frame. The backrest mattress is fixedly laid on the upper surface of the adjustment frame. A fixed seat is fixedly installed on the upper part of the right bed frame. The two ends of the telescopic assembly are respectively hinged to the bottom end of the adjustment frame and the fixed seat, and are used to support the adjustment frame and adjust its rotation angle.

[0010] Furthermore, the telescopic assembly includes a U-shaped support plate and a U-shaped telescopic plate. The telescopic plate is slidably fitted to the inner side of the support plate and can reciprocate along the length of the support plate. One end of the support plate is hinged to the fixed seat, and one end of the telescopic plate is hinged to the bottom end of the adjusting frame. Both ends of the support plate have connecting holes, and both ends of the telescopic plate have limiting holes corresponding to the positions of the connecting holes. Each connecting hole has a limiting rod slidably connected to it. One end of the limiting rod can be inserted into the corresponding limiting hole, and a second return spring is fixedly connected between one end of the limiting rod and the inner cavity of the connecting hole.

[0011] Furthermore, it also includes a guardrail folding mechanism, which includes connecting seats. The connecting seats are U-shaped and there are eight of them. The eight connecting seats are respectively fixedly connected to both ends of the left bed frame and both ends of the right bed frame. Guardrails are respectively installed on the two connecting seats on the same side of the left and right bed frames. Rectangular holes are opened on both ends of the sidewalls of the connecting seats. A limiting shaft is slidably fitted in each rectangular hole. One end of the limiting shaft is fixedly connected to the bottom end of the guardrail. A U-shaped positioning groove is opened on the top of the connecting seat. A positioning shaft is fixedly connected to the side end of the guardrail. The positioning shaft can be inserted into the U-shaped positioning groove.

[0012] Furthermore, magnetic bases are fixedly connected to the crossbar between the two support columns on the left bed frame and the crossbar between the two support columns on the right bed frame, and the positions of the two magnetic bases are corresponding. Magnetic plates and permanent magnets are fixedly connected to the two magnetic bases respectively.

[0013] Furthermore, the support column on the right side of the bed frame is provided with a buckle, through which a damping shaft rotates. A rotating arm is fixedly connected to the damping shaft, and one end of the rotating arm is fixedly connected to an infusion rod fixing seat with a cylindrical structure. A screw is threaded through the side end of the infusion rod fixing seat, and one end of the screw is placed in the inner cavity of the infusion rod fixing seat.

[0014] The beneficial effects of this utility model are: The linkage folding mechanism significantly reduces the size, making it suitable for confined spaces such as ambulances and narrow rescue operations. The reset pin locking mechanism ensures structural stability after unfolding, while the magnetic locking prevents accidental loosening after folding. The adjustable backrest mattress, combined with the limit locking of the telescopic components, enhances patient comfort and ensures angle stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall unfolded structure of a folding stretcher cart proposed in this utility model; Figure 2 This is a schematic diagram of the backrest mattress angle adjustment structure of a folding stretcher cart proposed in this utility model; Figure 3 This is a schematic diagram of the buckle-type adjustable infusion rod fixing seat structure of a folding stretcher cart proposed in this utility model; Figure 4 This is a schematic diagram of the overall folding front structure of a folding stretcher cart proposed in this utility model; Figure 5 This is a schematic diagram of the overall folding magnetic sheet and permanent magnet adsorption structure of a folding stretcher cart proposed in this utility model; Figure 6 This is a schematic diagram of the overall unfolded bottom structure of a folding stretcher cart proposed in this utility model; Figure 7 This is a schematic diagram of the magnetic attraction structure of a folding stretcher cart proposed in this utility model; Figure 8 This is a side sectional view of the connection between the central guide frame, the central slider, and the reset pin of a folding stretcher cart proposed in this utility model. Figure 9 This is a front view of the telescopic component of a folding stretcher cart proposed in this utility model; Figure 10 This is a schematic diagram of the foldable guardrail structure of a foldable stretcher cart proposed in this utility model; Figure 11 This is a schematic diagram of the overall frame structure of a folding stretcher cart proposed in this utility model.

[0016] The markings in the diagram are as follows: 1. Central guide frame; 2. Left side bed frame; 3. Right side bed frame; 4. Support column; 5. Casters; 6. Crossbar; 7. Left side mattress; 8. Right side mattress; 9. Backrest mattress; 10. Magnetic seat; 11. Guardrail; 12. Central slider; 13. Bottom connecting frame; 14. Diagonal brace; 15. Rotating arm; 16. Infusion rod fixing seat; 17. Screw; 18. Reset pin; 19. Magnetic plate; 20. Permanent magnet; 21. First reset spring; 22. Insertion hole; 23. Support plate; 24. Telescopic plate; 25. Limiting hole; 26. Connecting hole; 27. Limiting rod; 28. Second reset spring; 29. ​​Connecting seat; 30. Rectangular hole; 31. Positioning shaft; 32. Limiting shaft; 33. U-shaped positioning groove; 34. Connecting block; 35. Adjusting frame; 36. Damping rotating shaft; 37. Buckle. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0018] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0019] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0020] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0022] Reference Figures 1 to 11 A folding stretcher cart, comprising: The bed frame assembly includes a left bed frame 2, a right bed frame 3, a middle guide frame 1, and a bottom connecting frame 13. Connecting blocks 34 are fixed on both sides of the outside of the middle guide frame 1. The opposite ends of the left bed frame 2 and the right bed frame 3 are respectively hinged to the outside of the two connecting blocks 34. The linkage folding mechanism includes four "J"-shaped support columns 4, two central sliders 12, two crossbars 6, and diagonal braces 14. The four support columns 4 are respectively hinged to the bottom sides of the left bed frame 2 and the right bed frame 3. The two central sliders 12 are respectively slidably engaged with the outer sides of the central guide frame 1. The two crossbars 6 are respectively fixed between the two support columns 4 of the left bed frame 2 and the two support columns 4 of the right bed frame 3. The two ends of the bottom connecting frame 13 are respectively hinged between the crossbars 6 and the central guide frame 1. The two ends of the diagonal braces 14 are respectively hinged between the central sliders 12 and the crossbars 6. A locking mechanism is provided on the middle slider 12 and is used to lock the left bed frame 2 and the right bed frame 3. A moving mechanism, located at the bottom end of the supporting column 4, is used for moving the bed frame assembly. Preferably, the entire assembly is made of corrosion-resistant (304 stainless steel round or square tubing) to extend its service life.

[0023] This application provides hinge points for the left bed frame 2 and right bed frame 3 through the connecting blocks 34 on both sides of the central guide frame 1. The "J"-shaped support column 4 is hinged to the bottom of the bed frame. Together with the sliding engagement of the central slider 12 and the central guide frame 1, the hinges at both ends of the diagonal brace 14 (connecting the central slider 12 and the crossbar 6), and the hinge of the bottom connecting frame 13 (connecting the crossbar 6 and the central guide frame 1), a complete linkage folding link is formed. When unfolded, it pushes the left and right bed frames to rotate around the connecting blocks 34, the central slider 12 slides along the guide frame, and the diagonal brace 14... The bed frame extends synchronously to a horizontal position, and the locking mechanism locks the relative positions of the left and right bed frames to ensure stability when unfolded. When folding, the locking mechanism is unlocked, and the bed frame is folded inward. The slider slides down, causing the diagonal brace 14 to shorten. The bed frame and the support column 4 fold together, greatly reducing the overall volume and adapting to the flexible deployment in the narrow space of the ambulance and narrow rescue scenarios. At the same time, the moving mechanism at the bottom of the support column 4 can drive the bed frame components to move smoothly, taking into account the convenience of transportation and effectively overcoming the problems of traditional stretcher carts being difficult to fold, large in size, and poor in movement and positioning.

[0024] In the example of this application, the mattress assembly is also included, comprising a left mattress 7, a right mattress 8, and a backrest mattress 9. The left mattress 7 is fixed to the upper surface of the left bed frame 2 by hexagonal bolts, the right mattress 8 is fixed to the upper surface of the right bed frame 3 by hexagonal bolts, and the backrest mattress 9 is rotatably connected to the upper surface of the right bed frame 3 via an adjustment assembly. Preferably, the mattress is made of an easily disinfectable material (such as Oxford leather).

[0025] As a preferred example of this utility model, the left mattress 7 and the right mattress 8 are fixed to the left and right bed frames respectively by hexagonal bolts. The rigid fit of the bolt connection ensures that the mattresses will not shift during transportation, improving stability. The backrest mattress 9 is rotatably connected to the right bed frame 3 through an adjustment component. Compared with traditional fixed mattresses, this structure can drive the backrest mattress 9 to rotate around the hinge point through the movement of the adjustment component, allowing the patient to adjust their lying posture according to their own needs, avoiding the discomfort caused by lying flat for a long time, significantly improving comfort during transportation, and adapting to the positional needs of patients with different conditions.

[0026] In the example of this application, the locking mechanism includes a reset pin 18 and a first reset spring 21; the reset pin 18 slides through the middle slider 12, and the side wall of the middle guide frame 1 is provided with an insertion hole 22 corresponding to the position of the reset pin 18, and the outer diameter of the reset pin 18 is adapted to the inner diameter of the insertion hole 22; the first reset spring 21 is sleeved on the rod segment of the reset pin 18 located outside the middle slider 12, and the two ends of the first reset spring 21 are fixedly connected to the middle slider 12 and the head of the reset pin 18, respectively.

[0027] As a preferred example of this utility model, the reset pin 18 slides through the middle slider 12 and is adapted to the size and position of the insertion hole 22 on the middle guide frame 1. The first reset spring 21 is sleeved on the outer rod section of the reset pin 18 to provide a continuous reset thrust for the reset pin 18. When the stretcher is unfolded to a horizontal state, the reset pin 18 automatically inserts into the insertion hole 22 under the action of the spring force, realizing the rigid locking of the left and right bed frames and the middle guide frame 1, preventing the bed frame from accidentally shifting after unfolding. When folding is required, the lock can be released simply by pulling the reset pin 18 outward. The operation is simple and the locking reliability is high, effectively avoiding the safety hazards caused by the failure of the lock after the traditional stretcher is unfolded, and ensuring the structural stability during patient transport.

[0028] In the example of this application, the moving mechanism includes moving wheels 5 fixedly installed at the bottom of the four supporting columns 4. The moving wheels 5 are silent omnidirectional wheels and are equipped with brakes.

[0029] As a preferred example of this utility model, four movable wheels 5 are fixed one-to-one with the bottom of the supporting column 4. The omnidirectional wheel structure gives the bed flexible steering ability, which can easily adjust the direction of travel in narrow passages, solving the problem of difficult steering of traditional fixed-direction wheels. At the same time, the quiet characteristics can reduce the noise generated by the rolling of the wheels during the transfer, avoiding interference with quiet environments such as hospitals. The braking function can quickly lock the wheels when the stretcher stops to prevent the vehicle from shifting. Whether it is for patients getting on or off the vehicle or for temporary parking, it can maintain a stable state, overcoming the defects of traditional stretchers that are not flexible in movement and are easy to slide when parked, thus improving the safety of the transfer and environmental adaptability.

[0030] In the example of this application, the adjustment component includes an adjustment frame 35 and a telescopic component. One end of the adjustment frame 35 is hinged to the rear end of the right bed frame 3. The backrest mattress 9 is fixedly laid on the upper surface of the adjustment frame 35. A fixed seat is fixedly provided on the upper part of the right bed frame 3. The two ends of the telescopic component are respectively hinged to the bottom end of the adjustment frame 35 and the fixed seat, and are used to support the adjustment frame 35 and adjust its rotation angle.

[0031] As a preferred example of this utility model, one end of the adjustment frame 35 is hinged to the rear end of the right bed frame 3, and the backrest mattress 9 is fixed to the adjustment frame 35, so that the rotation of the adjustment frame 35 can directly drive the angle change of the backrest mattress 9; the fixed seat on the right bed frame 3 provides a mounting fulcrum for the telescopic component, and the two ends of the telescopic component are respectively hinged to the bottom end of the adjustment frame 35 and the fixed seat. By changing the length of the telescopic component, the adjustment frame 35 can be pushed to rotate around the hinge point. When it is necessary to adjust the backrest angle, the telescopic component extends or shortens, causing the adjustment frame 35 to rotate up or down, thereby changing the tilt angle of the backrest mattress 9. Thus, this hinged and telescopic coordinated structure can provide stable support for the backrest and improve the experience during transportation.

[0032] In the example of this application, the telescopic assembly includes a U-shaped support plate 23 and a U-shaped telescopic plate 24. The telescopic plate 24 is slidably fitted to the inner side of the support plate 23 and can slide back and forth along the length direction of the support plate 23. One end of the support plate 23 is hinged to the fixed seat, and one end of the telescopic plate 24 is hinged to the bottom end of the adjusting frame 35. Both ends of the support plate 23 are provided with connecting holes 26, and both ends of the telescopic plate 24 are provided with limiting holes 25 corresponding to the positions of the connecting holes 26. Each connecting hole 26 is slidably connected with a limiting rod 27. One end of the limiting rod 27 can be inserted into the corresponding limiting hole 25. A second return spring 28 is fixedly connected between one end of the limiting rod 27 and the inner cavity of the connecting hole 26.

[0033] As a preferred example of this utility model, the telescopic plate 24 is slidably fitted inside the support plate 23 and can reciprocate along the length of the support plate 23. The connecting holes 26 at both ends of the support plate 23 correspond to the limiting holes 25 of the telescopic plate 24. The limiting rod 27 is slidably inserted into the connecting hole 26. The two ends of the second return spring 28 abut against the limiting step of the limiting rod 27 and the bottom of the connecting hole 26, respectively, providing a continuous insertion force for the limiting rod 27. When the telescopic assembly is adjusted to the target length, the limiting rod 27 automatically inserts into the corresponding limiting hole 25 under the action of the spring force, locking the relative position of the support plate 23 and the telescopic plate 24, ensuring that the adjusted backrest angle will not change due to the patient's weight or vibration, effectively ensuring the structural reliability after the backrest angle is adjusted.

[0034] In the example of this application, a guardrail folding mechanism is also included. The guardrail folding mechanism includes a connecting seat 29, which has a U-shaped structure and eight of them. The eight connecting seats 29 are respectively fixedly connected to both ends of the left bed frame 2 and both ends of the right bed frame 3. Guardrails 11 are respectively mounted on the two connecting seats 29 on the same side of the left bed frame 2 and the right bed frame 3. Rectangular holes 30 are opened on both side walls of the connecting seat 29. A limiting shaft 32 is slidably fitted in each rectangular hole 30. One end of the limiting shaft 32 is fixedly connected to the bottom end of the guardrail 11. A U-shaped positioning groove 33 is opened on the top of the connecting seat 29. A positioning shaft 31 is fixedly connected to the side end of the guardrail 11. The positioning shaft 31 can be inserted into the U-shaped positioning groove 33.

[0035] As a preferred example of this utility model, eight U-shaped connecting seats 29 are fixed to both ends of the left and right bed frames respectively. Two connecting seats 29 on the same side are equipped with a guardrail 11. The four guardrails 11 correspond to the front, back, left, and right sides of the bed, forming a full-enclosed protection to prevent the patient from accidentally slipping during transport. The guardrail 11 moves up and down through the sliding cooperation between the limiting shaft 32 and the rectangular hole 30 of the connecting seat 29. It is unfolded and locked by the engagement of the positioning shaft 31 and the U-shaped positioning groove 33 of the connecting seat 29. When unfolding, push the guardrail 11 upward to make the positioning shaft 31 engage with the U-shaped groove to complete the locking. When folding, lift the guardrail 11 upward to make the positioning shaft 31 disengage from the U-shaped groove, and then slide the limiting shaft 32 downward to fold the guardrail 11 to the side of the bed frame. The operation is simple and does not take up extra space after storage, overcoming the problems of traditional guardrails 11 being difficult to unfold and lock and having a large volume after folding.

[0036] In the example of this application, a magnetic base 10 is fixedly connected to the crossbar 6 between the two support columns 4 on the left bed frame 2 and the crossbar 6 between the two support columns 4 on the right bed frame 3, and the positions of the two magnetic bases 10 are corresponding. A magnetic plate 19 and a permanent magnet 20 are fixedly connected to the two magnetic bases 10 respectively.

[0037] As a preferred example of this utility model, magnetic seats 10 are fixed to the crossbars 6 between the left and right bed frame 2 support columns 4 and the crossbars 6 between the right and right bed frame 3 support columns 4, respectively. Magnetic plates 19 and permanent magnets 20 are respectively mounted on the two magnetic seats 10. When the stretcher is folded, the left and right crossbars 6 gradually move closer together as the bed frame is folded. Finally, the magnetic plates 19 and permanent magnets 20 attract each other under the action of magnetic force, firmly locking the folded left and right bed frames and support columns 4, preventing the folded structure from accidentally unfolding during transportation or storage. This magnetic locking method requires no additional operation, takes effect automatically after folding, and can be separated by applying only a slight external force when unlocking, taking into account both locking reliability and operation convenience, and ensuring the structural stability in the folded state.

[0038] In the example of this application, the support column 4 on the right bed frame 3 is provided with a buckle 37, and a damping shaft 36 is rotatably passed through the buckle 37. A rotating arm 15 is fixedly connected to the damping shaft 36. One end of the rotating arm 15 is fixedly connected to an infusion rod fixing seat 16 with a cylindrical structure. A screw 17 is threaded through the side end of the infusion rod fixing seat 16, and one end of the screw 17 is placed in the inner cavity of the infusion rod fixing seat 16.

[0039] As a preferred example of this utility model, the buckle 37 is fixed to the support column 4 of the right side bed frame 3, providing an installation base for the damping shaft 36. The damping shaft 36 can rotate freely relative to the buckle 37 and can remain stable at any angle (damping characteristics). The rotating arm 15 connected to it can drive the infusion rod fixing seat 16 to adjust its position. The cylindrical infusion rod fixing seat 16 can insert the infusion rod. The screw 17 with thread through the side end can tighten and press against the infusion rod to achieve a stable fixation of the infusion rod. During the transfer, the horizontal angle of the infusion rod fixing seat 16 can be adjusted by rotating the damping shaft 36 to meet different infusion orientation requirements. The screw 17 locks to ensure that the infusion rod will not shake, so that the patient can continue to receive infusion treatment during the transfer without interrupting the operation, improving the continuity of emergency treatment and transfer, and expanding the functional applicability of the stretcher.

[0040] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A folding stretcher cart, characterized in that, include: The bed frame assembly includes a left bed frame (2), a right bed frame (3), a middle guide frame (1) and a bottom connecting frame (13). Connecting blocks (34) are fixed on both sides of the middle guide frame (1). The opposite ends of the left bed frame (2) and the right bed frame (3) are respectively hinged to the outside of the two connecting blocks (34). The linkage folding mechanism includes four "J"-shaped support columns (4), two central sliders (12), two crossbars (6), and diagonal braces (14). The four support columns (4) are respectively hinged to the bottom sides of the left bed frame (2) and the right bed frame (3). The two central sliders (12) are respectively slidably engaged with the outer sides of the central guide frame (1). The two crossbars (6) are respectively fixed between the two support columns (4) of the left bed frame (2) and between the two support columns (4) of the right bed frame (3). The two ends of the bottom connecting frame (13) are respectively hinged between the crossbars (6) and the central guide frame (1). The two ends of the diagonal braces (14) are respectively hinged between the central sliders (12) and the crossbars (6). A locking mechanism is provided on the middle slider (12) for locking the left bed frame (2) and the right bed frame (3). The moving mechanism is located at the bottom of the supporting column (4) and is used to move the bed frame assembly.

2. The folding stretcher cart according to claim 1, characterized in that, It also includes a mattress assembly, which includes a left mattress (7), a right mattress (8) and a backrest mattress (9). The left mattress (7) is fixed to the upper surface of the left bed frame (2) by hexagonal bolts. The right mattress (8) is fixed to the upper surface of the right bed frame (3) by hexagonal bolts. The backrest mattress (9) is rotatably connected to the upper surface of the right bed frame (3) by an adjustment component.

3. A folding stretcher cart according to claim 1, characterized in that, The locking mechanism includes a reset pin (18) and a first reset spring (21); the reset pin (18) slides through the middle slider (12), and the side wall of the middle guide frame (1) is provided with a socket (22) corresponding to the position of the reset pin (18), and the outer diameter of the reset pin (18) is adapted to the inner diameter of the socket (22); the first reset spring (21) is sleeved on the rod segment of the reset pin (18) located outside the middle slider (12).

4. A folding stretcher cart according to claim 1, characterized in that, The moving mechanism includes moving wheels (5) fixedly installed at the bottom of the four supporting columns (4).

5. A folding stretcher cart according to claim 2, characterized in that, The adjustment assembly includes an adjustment frame (35) and a telescopic assembly. One end of the adjustment frame (35) is hinged to the rear end of the right bed frame (3). The backrest mattress (9) is fixedly laid on the upper surface of the adjustment frame (35). A fixed seat is fixedly installed on the upper part of the right bed frame (3). The two ends of the telescopic assembly are respectively hinged to the bottom end of the adjustment frame (35) and the fixed seat, and are used to support the adjustment frame (35) and adjust its rotation angle.

6. A folding stretcher cart according to claim 5, characterized in that, The telescopic assembly includes a support plate (23) with a U-shaped structure and a telescopic plate (24) with a U-shaped structure. The telescopic plate (24) is slidably fitted to the inner side of the support plate (23) and can slide back and forth along the length direction of the support plate (23). One end of the support plate (23) is hinged to the fixed seat, and one end of the telescopic plate (24) is hinged to the bottom end of the adjustment frame (35). Both ends of the support plate (23) are provided with connecting holes (26), and both ends of the telescopic plate (24) are provided with limiting holes (25) corresponding to the positions of the connecting holes (26). Each connecting hole (26) is slidably connected with a limiting rod (27). One end of the limiting rod (27) can be inserted into the corresponding limiting hole (25). A second return spring (28) is fixedly connected between one end of the limiting rod (27) and the inner cavity of the connecting hole (26).

7. A folding stretcher cart according to claim 1, characterized in that, It also includes a guardrail folding mechanism, which includes a connecting seat (29). The connecting seat (29) has a U-shaped structure and there are eight of them. The eight connecting seats (29) are respectively fixedly connected to both ends of the left bed frame (2) and both ends of the right bed frame (3). Guardrails (11) are respectively mounted on the two connecting seats (29) on the same side of the left bed frame (2) and the right bed frame (3). Rectangular holes (30) are opened on both ends of the sidewalls of the connecting seat (29). A limiting shaft (32) is slidably fitted in each rectangular hole (30). One end of the limiting shaft (32) is fixedly connected to the bottom end of the guardrail (11). A U-shaped positioning groove (33) is opened on the top of the connecting seat (29). A positioning shaft (31) is fixedly connected to the side end of the guardrail (11). The positioning shaft (31) can be inserted into the U-shaped positioning groove (33).

8. A folding stretcher cart according to claim 1, characterized in that, A magnetic base (10) is fixedly connected to the crossbar (6) between the two support columns (4) on the left bed frame (2) and the crossbar (6) between the two support columns (4) on the right bed frame (3), and the positions of the two magnetic bases (10) are corresponding. A magnetic plate (19) and a permanent magnet (20) are fixedly connected to the two magnetic bases (10) respectively.

9. A folding stretcher cart according to claim 7, characterized in that, The right side bed frame (3) has a buckle (37) on the support column (4). A damping shaft (36) is rotatably passed through the buckle (37). A rotating arm (15) is fixedly connected to the damping shaft (36). One end of the rotating arm (15) is fixedly connected to an infusion rod fixing seat (16) with a cylindrical structure. A screw (17) is threaded through the side end of the infusion rod fixing seat (16), and one end of the screw (17) is placed in the inner cavity of the infusion rod fixing seat (16).

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