Portable telescopic stretcher

Abstract

The invention relates to the field of first-aid medical instruments, and discloses a portable telescopic stretcher which comprises telescopic rods and supporting columns, the two ends of each telescopic rod are movably sleeved with sleeve rods, a plurality of positioning holes are formed in rod bodies of the sleeve rods, elastic positioning rods are installed on the rod bodies at the two ends of each telescopic rod, and the telescopic rods are connected with the supporting columns. The elastic positioning rods are matched with the positioning holes and are movably connected with the positioning holes in a sleeving mode, pocket cloth is installed on the inner sides of the sleeve rods and the telescopic rods, and a handle is connected to one end of the outer side of each sleeve rod. The stretcher frame body is matched with the transportation mechanism, so that the stretcher can be conveniently fixed on transportation tools such as airplanes and the like and is conveyed to a proper height through the transportation mechanism, the manual carrying difficulty is reduced, and the sick and wounded transferring efficiency is improved; small wheels are distributed at the bottom of the stretcher, so that when a single person transfers the sick and wounded, the stretcher can be easily, stably and conveniently moved; due to the telescopic function of the stretcher, the size can be reduced when the stretcher is not used, storage and carrying are convenient, and space resources are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of emergency medical equipment, and in particular relates to a portable retractable stretcher. Background Art

[0002] Stretchers are essential tools for rescuing critically ill patients. In complex and ever-changing medical rescue scenarios, especially when transporting the wounded and sick on special transportation vehicles such as airplanes, which have strict requirements on space layout and equipment adaptability, existing stretchers expose many inconveniences that cannot be ignored.

[0003] Traditional stretchers are relatively outdated in design and often feature a very simple structure. Their dimensions and construction make them difficult to adapt to the limited and unique interior space and various specialized fixtures within an aircraft. When a patient needs to be manually loaded onto a stretcher and properly positioned within the aircraft cabin, the lack of effective auxiliary transport mechanisms like slides and lifts makes the operation extremely difficult, consuming considerable physical effort and time. Furthermore, even the slightest carelessness during the transport process can easily lead to secondary injuries to the patient due to bumps and collisions, exacerbating their pain and condition. Furthermore, in actual medical rescue operations, patients vary in height, yet most existing stretchers lack flexibility and cannot be adjusted to the patient's specific needs. For example, for patients of varying heights, the stretcher's length cannot be easily and quickly adjusted, which significantly impacts the timeliness and effectiveness of medical treatment. Furthermore, the fixed shape of existing stretchers makes them difficult to store and occupies a large amount of space. In addition, most stretchers do not have a telescopic function, and their large size will take up too much space when not in use. Whether in the limited storage space on an airplane or in other storage places such as hospital warehouses and ambulances, they are not conducive to storage and carrying, which brings many obstacles to the efficient implementation of medical rescue work.

[0004] Based on this, the present invention proposes a portable retractable stretcher to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] In view of this, the primary purpose of the present invention is to provide a portable, retractable stretcher to address the aforementioned issue of lacking effective auxiliary transport mechanisms such as slide rails and lifting devices. This not only makes it extremely difficult for transporters to operate, consuming significant physical effort and time, but also can easily lead to secondary injuries to the patient due to bumps, collisions, and other factors during transport, exacerbating their pain and condition. Furthermore, in actual medical rescue operations, patients vary in height, yet most existing stretchers lack flexibility and cannot be flexibly adjusted to the patient's specific needs. The inability to easily and quickly adjust the length of the stretcher significantly impacts the timeliness and effectiveness of medical treatment. Furthermore, the fixed shape of existing stretchers makes them difficult to store and occupies a large space. Since most stretchers lack a retractable function, their large size consumes excessive space when not in use, making them inconvenient to store and carry.

[0006] The technical solution of the present invention is achieved as follows:

[0007] A portable telescopic stretcher comprises a telescopic rod and a support column, wherein both ends of the telescopic rod are movably connected with a sleeve rod, a rod body of the sleeve rod is provided with a plurality of positioning holes, elastic positioning rods are installed on the rod bodies at both ends of the telescopic rod, the elastic positioning rods match the positioning holes and are movably sleeved therewith, pocket cloths are installed on the inner sides of the sleeve rod and the telescopic rod, an outer end of the sleeve rod is connected with a handle, a folding rod is movably installed on the inner side of the handle, a small wheel is installed at the lower end of the folding rod, and a button and a card rod are installed on the rod body at the other end of the folding rod, the button is connected to the card rod, and connecting plates are movably installed on the upper and lower surfaces of the inner end of the folding rod, and grooves are provided at both ends of the connecting plate at the upper end, and the grooves are connected to the card rod. The stretcher body matches the pole and is snapped into place with it; it is easy to transport and install. The cooperation between the stretcher body and the transport mechanism enables the stretcher to be easily fixed on transportation tools such as airplanes, and is sent to a suitable height through the transport mechanism, which reduces the difficulty of manual handling and improves the efficiency of transferring the wounded and sick. The bottom of the transport mechanism has a certain cushioning effect, which increases the comfort of the wounded and sick during the transfer. There are multiple high-strength, wear-resistant and noise-resistant small wheels evenly distributed on the bottom of the stretcher, which makes it easy to move the stretcher smoothly and conveniently whether it is adjusting its position on the stretcher body or transferring the wounded and sick over a short distance on the ground. The telescopic function of the stretcher enables it to be reduced in size when not in use, which is convenient for storage and carrying and saves space resources.

[0008] As a preferred embodiment of the present invention, a partition is internally connected to the lower end of the support column, a buffer rod is movably sleeved inside the lower end of the support column, a lower anti-slip foot is installed at the lower end of the buffer rod, and a spring is installed between the buffer rod and the partition; the bottom of the transport mechanism has a certain buffering effect, which increases the comfort of the injured during the transfer process.

[0009] As a preferred embodiment of the present invention, a threaded rod is movably sleeved inside the upper end of the support column, an upper anti-slip foot is installed on the upper end of the threaded rod, and an adjusting button sleeve is movably sleeved on the outer periphery of the upper end of the support column. The annular groove provided inside the adjusting button sleeve matches the circular protrusion provided on the outer periphery of the support column and is movably sleeved therewith.

[0010] As a preferred embodiment of the present invention, a threaded sleeve is internally connected to the upper end of the adjusting knob sleeve, the inner ring of the threaded sleeve matches the threaded rod and is threadedly sleeved therewith, and a sliding groove is provided on the rod body of the threaded rod.

[0011] As a preferred embodiment of the present invention, a sleeve is movably sleeved on the rod body of the threaded rod, and the inner ring of the sleeve is connected to a slider, which matches the slide groove and is slidably sleeved therewith. An upper frame is provided on the inner side of the sleeve, and the four corners of the upper frame match the sleeve and are connected therewith. A driving motor is installed on the outer side of the upper frame, and the outer periphery of the sleeve is connected to an upper strap ring; when in use, the injured person is first lifted onto the stretcher, and then transferred to the interior of the transport vehicle. If there are not enough people in this process, the small wheels under the stretcher can be used for sliding; after the injured person enters the interior of the transport vehicle, the sleeve rod of the stretcher is aligned and snapped together.

[0012] As a preferred embodiment of the present invention, a fixing sleeve is installed on the outer periphery of the lower end of the support column, and a lower frame is provided on the inner side of the fixing sleeve. The four corners of the lower frame match the fixing sleeve and are connected with it, and the inner sides of the lower frame and the upper frame are connected with an axle rod fixing sleeve; when installing the lifting mechanism, the threaded rod is first extended by rotating the adjusting knob sleeve, and the upper and lower anti-slip feet are in close contact with the top and bottom of the transport vehicle, and a certain extrusion force is generated to prevent sliding during transportation, and then the upper and lower corners of the support column are fixed to the box body of the transport vehicle by straps and strap rings to increase the firmness.

[0013] As a preferred embodiment of the present invention, the interior of the shaft fixing sleeve is movably sleeved with a shaft, both ends of the shaft are movably connected to the frame bodies of the lower frame and the upper frame, one end of the shaft at the upper end matches the transmission shaft of the drive motor and is connected to it, and a connecting column is connected between the lower frame and the upper frame.

[0014] As a preferred embodiment of the present invention, transmission rollers are connected to the rod bodies at both ends of the shaft rod, and a conveyor belt is sleeved and installed on the outer periphery of the transmission roller.

[0015] As a preferred embodiment of the present invention, the periphery of the conveyor belt is connected with a buckle, which matches the sleeve rod and is clamped with it; after the injured person enters the interior of the transport vehicle, the sleeve rod of the stretcher is aligned and clamped with the buckle, and then the drive motor is started to lift the patient to a certain height to facilitate the placement of the next patient. This design can make full use of the limited space in the transport vehicle and increase the transportation efficiency of the injured and sick.

[0016] As a preferred embodiment of the present invention, a lower strap ring is connected to the periphery of the fixing sleeve.

[0017] Compared with the prior art, the present invention provides a portable retractable stretcher with the following advantages:

[0018] 1. The stretcher's structural design allows for smooth and convenient movement, whether adjusting its position on the stretcher frame or transferring a patient over short distances on the ground. Its telescopic function allows it to be reduced in size when not in use, making it easier to store and carry, saving space during aircraft transport. Furthermore, multiple high-strength, wear-resistant, and silent small wheels are evenly distributed on the bottom of the stretcher, allowing for smooth and convenient movement, whether adjusting its position on the stretcher frame or transferring a patient over short distances on the ground.

[0019] 2. Through the setting of the transfer mechanism, when in use, the stretcher can be conveniently fixed on a transport vehicle such as an airplane through the cooperation between the stretcher frame and the transport mechanism, and can be sent to a suitable height through the transport mechanism, which reduces the difficulty of manual handling and improves the efficiency of transporting the wounded and sick; and the bottom of the transport mechanism has a certain cushioning effect, which can increase the comfort of the wounded and sick during the transfer process such as take-off and landing of the aircraft; it solves the problems of the traditional stretcher structure such as the difficulty in transportation and handling, the inability to flexibly adjust the stretcher according to the actual situation of the wounded and sick, the inconvenience of storage, and the large space occupied. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the top view of the portable retractable stretcher of the present invention when it is unfolded;

[0022] Figure 2 This is a schematic diagram of the structure of the portable retractable stretcher of the present invention when unfolded;

[0023] Figure 3 This is a schematic diagram of the structure of the portable retractable stretcher of the present invention when it is folded;

[0024] Figure 4 This is a schematic diagram of the structure of the portable retractable stretcher of the present invention when folded;

[0025] Figure 5 This is a schematic diagram of the main structure of the multi-layer structure of the portable retractable stretcher of the present invention;

[0026] Figure 6 Schematic diagram of the rear view of the portable telescopic stretcher of the present invention in a symmetrical structural state;

[0027] Figure 7 This is a disassembled schematic diagram of the portable retractable stretcher lifting conveyor belt of the present invention;

[0028] Figure 8 Schematic cross-section of the adjustment ring of the portable retractable stretcher of the present invention;

[0029] Figure 9 is a schematic cross-sectional view of the upper end of the portable retractable stretcher support structure of the present invention;

[0030] Figure 10 The figure is a schematic cross-sectional view of the lower end of the portable telescopic stretcher support structure of the present invention.

[0031] In the figure: 1. pocket cloth; 2. telescopic rod; 3. sleeve rod; 4. positioning hole; 5. elastic positioning rod; 6. handle; 7. folding rod; 8. button; 9. clamping rod; 10. connecting plate; 11. small wheel; 12. lower frame; 13. upper frame; 14. connecting column; 15. support column; 16. adjusting button sleeve; 17. threaded rod; 18. sleeve; 19. upper non-slip foot; 20. buffer rod; 21. fixing sleeve; 22. lower strap ring; 23. upper strap ring; 24. shaft rod fixing sleeve; 25. shaft rod; 26. conveyor belt; 27. lower non-slip foot; 28. drive motor; 29. ​​buckle; 30. threaded sleeve; 31. circular protrusion; 32. slide groove; 33. slider; 34. partition; 35. spring; 36. strap. DETAILED DESCRIPTION

[0032] The structure of the portable retractable stretcher will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0037] like Figures 1 to 10As shown, the present invention provides a portable retractable stretcher, comprising a telescopic rod 2 and a support column 15, wherein both ends of the telescopic rod 2 are movably connected with a sleeve rod 3, a rod body of the sleeve rod 3 is provided with a plurality of positioning holes 4, and elastic positioning rods 5 are installed on the rod bodies at both ends of the telescopic rod 2, the elastic positioning rods 5 match the positioning holes 4 and are movably sleeved therewith; a bag cloth 1 is installed on the inner sides of the sleeve rod 3 and the telescopic rod 2, and a handle 6 is connected to the outer end of the sleeve rod 3, a folding rod 7 is movably installed on the inner side of the handle 6, a small wheel 11 is installed at the lower end of the folding rod 7, and a button 8 and a card rod 9 are installed on the rod body of the other end of the folding rod 7, the button 8 is connected to the card rod 9; connecting plates 10 are movably installed on the upper and lower surfaces of the inner end of the folding rod 7, wherein both ends of the connecting plate 10 at the upper end are provided with grooves, the grooves match the card rod 9 and are carded therewith.

[0038] In the above description, the stretcher structure is arranged so as to facilitate its transportation and installation, and the cooperation between the stretcher frame and the transport mechanism enables the stretcher to be conveniently fixed on a transport vehicle such as an airplane, and to be sent to a suitable height by the transport mechanism, thereby reducing the difficulty of manual handling and improving the efficiency of transferring the wounded and sick. The bottom of the transport mechanism has a certain cushioning effect, which increases the comfort of the wounded and sick during the transfer process. A plurality of high-strength, wear-resistant and noise-reducing small wheels 11 are evenly distributed on the bottom of the stretcher, so that the stretcher can be easily and smoothly moved whether it is adjusting its position on the stretcher frame or transferring the wounded and sick over a short distance on the ground. The telescopic function of the stretcher enables it to be reduced in size when not in use, which is convenient for storage and carrying, saving space resources.

[0039] In a preferred embodiment, Figure 1 and Figure 10 As shown, a partition 34 is connected to the interior of the lower end of the support column 15, and a buffer rod 20 is movably sleeved inside the lower end of the support column 15. A lower anti-slip foot 27 is installed at the lower end of the buffer rod 20, and a spring 35 is installed between the buffer rod 20 and the partition 34.

[0040] In the above description, through the provision of the support column 15 and the anti-slip feet 27, the buffering capacity of the support column 15 after being subjected to vibration during the transfer process can be enhanced during use, so as to ensure the safety of the injured during transportation; and through the provision of the anti-slip feet 27, the fixed stability of the lower end of the support column 15 during the transfer process can be increased to ensure the comfort of the injured during the transfer process.

[0041] In a preferred embodiment, Figure 1 、 Figure 5 , same as 6, Figure 7 、 Figure 8 and Figure 9As shown, the upper end of the support column 15 is movably sleeved with a threaded rod 17, and the upper end of the threaded rod 17 is installed with an upper anti-slip foot 19; the upper end of the support column 15 is movably sleeved with an adjusting button sleeve 16, and the annular groove opened inside the adjusting button sleeve 16 matches the circular ring protrusion 31 set on the outer periphery of the support column 15 and is movably sleeved therewith; the upper end of the adjusting button sleeve 16 is internally connected with a threaded sleeve 30, and the inner ring of the threaded sleeve 30 matches the threaded rod 17 and is screwed therewith. The threaded rod 17 is connected with a groove 32, and a sleeve 18 is movably connected to the rod body of the threaded rod 17. The inner ring of the sleeve 18 is connected with a slider 33, and the slider 33 matches the groove 32 and is slidably connected with it. The inner side of the sleeve 18 is provided with an upper frame 13, and the four corners of the upper frame 13 match the sleeve and are connected with it, and a drive motor 28 is installed on the outer side of the upper frame 13, and the outer periphery of the sleeve 18 is connected with an upper strap ring 23.

[0042] In the above description, when in use, the injured person is first lifted onto the stretcher and then transferred to the interior of the transport vehicle. If there is insufficient manpower during this process, the small wheels 11 under the stretcher can be used for sliding, thereby improving the transfer efficiency and reducing ineffective labor during the transfer process.

[0043] At the same time, during the transportation of the wounded, after the wounded enter the interior of the transport vehicle, they align and snap-fit ​​the stretcher's sleeve rod 3 with the buckle 29, and then start the drive motor 28 to lift the patient to a certain height to facilitate the placement of the next patient. This design can make full use of the limited space in the transport vehicle and increase the transportation efficiency of the wounded; and when installing the lifting mechanism, first extend the threaded rod 17 by rotating the adjusting knob sleeve 16, and make the upper anti-slip feet 19 and the lower anti-slip feet 27 closely contact the top and bottom of the transport vehicle, and generate a certain extrusion force to prevent sliding during transportation, and then fix the upper and lower corners of the support column 15 to the box of the transport vehicle through straps and strap rings, thereby increasing the firmness.

[0044] In a preferred embodiment, Figure 1 、 Figure 5 and Figure 6 As shown, a fixing sleeve 21 is installed on the outer periphery of the lower end of the support column 15, and a lower frame 12 is provided on the inner side of the fixing sleeve 21. The four corners of the lower frame 12 match the fixing sleeve 21 and are connected thereto, and an axle fixing sleeve 24 is connected to the inner side of the lower frame 12 and the upper frame 13, and a lower strap ring 22 is connected to the outer periphery of the fixing sleeve 21.

[0045] In the above description, when installing the lifting mechanism, first extend the threaded rod 17 by rotating the adjusting knob sleeve 16, and make the upper anti-slip feet 19 and the lower anti-slip feet 27 closely contact the top and bottom of the transport vehicle, and generate a certain extrusion force to prevent sliding during transportation, and then use straps and strap rings to fix the upper and lower corners of the support column 15 in the box of the transport vehicle to increase the firmness.

[0046] In a preferred embodiment, Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the interior of the shaft fixing sleeve 24 is movably sleeved with a shaft 25, and the two ends of the shaft 25 are movably connected to the frame bodies of the lower frame 12 and the upper frame 13, and one end of the shaft 25 at the upper end matches the transmission shaft of the drive motor 28 and is connected thereto, and a connecting column 14 is connected between the lower frame 12 and the upper frame 13; the rod bodies at both ends of the shaft 25 are connected to conveying rollers, and the outer periphery of the conveying roller is sleeved with a conveyor belt 26, and the outer periphery of the conveyor belt 26 is connected with a buckle 29, which matches the sleeve rod 3 and is clamped therewith.

[0047] In the above description, after the injured person enters the interior of the transport vehicle, the stretcher's sleeve rod 3 is aligned and connected with the buckle 29, and then the drive motor 28 is started to lift the patient to a certain height to facilitate the placement of the next patient. This design can make full use of the limited space in the transport vehicle and improve the transportation efficiency of the injured and sick.

[0048] In a preferred embodiment, Figure 1 As shown, a bandage 36 is installed on the inner side of the telescopic rod 2 for fixing the patient's body with the bandage 36 when in use.

[0049] The implementation principle of the portable retractable stretcher described in the present invention is as follows:

[0050] The utility model is convenient for transportation and installation. The cooperation between the stretcher frame and the transport mechanism enables the stretcher to be conveniently fixed on transportation vehicles such as airplanes, and is sent to a suitable height through the transport mechanism, which reduces the difficulty of manual handling and improves the efficiency of transferring the wounded and the sick. The bottom of the transport mechanism has a certain cushioning effect, which increases the comfort of the wounded and the sick during the transfer. A plurality of high-strength, wear-resistant and noise-reducing small wheels 11 are evenly distributed on the bottom of the stretcher, so that the stretcher can be easily and smoothly moved whether it is adjusting its position on the stretcher frame or transferring the wounded and the sick over a short distance on the ground. The telescopic function of the stretcher enables it to be reduced in size when not in use, which is convenient for storage and carrying, and saves space resources. When in use, the wounded and the sick are first lifted onto the stretcher and then transferred to the interior of the transportation vehicle. If there is no manpower in this process, The small wheels 11 under the stretcher can be used for sliding; after the injured person enters the interior of the transport vehicle, the sleeve rod 3 of the stretcher is aligned and connected with the buckle 29, and then the drive motor 28 is started to lift the patient to a certain height, which is convenient for placing the next patient. This design can make full use of the limited space in the transport vehicle and increase the transportation efficiency of the injured and sick; when installing the lifting mechanism, first extend the threaded rod 17 by rotating the adjusting knob sleeve 16, and make the upper anti-slip feet 19 and the lower anti-slip feet 27 closely contact the top and bottom of the transport vehicle, and generate a certain squeezing force to prevent sliding during transportation, and then fix the upper and lower corners of the support column 15 to the box body of the transport vehicle through straps and strap rings to increase the firmness; secondly, when not in use, the stretcher can be folded and retracted, which can greatly save storage space.

[0051] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of the present invention. Therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. A portable telescopic stretcher comprising a telescopic rod (2) and a support column (15), characterized in that: The two ends of the telescopic rod (2) are movably sleeved with a sleeve rod (3), and a plurality of positioning holes (4) are provided on the rod body of the sleeve rod (3). Elastic positioning rods (5) are installed on the rod bodies of both ends of the telescopic rod (2), and the elastic positioning rods (5) match the positioning holes (4). Bag cloths (1) are installed on the inner sides of the sleeve rod (3) and the telescopic rod (2). One end of the outer side of the sleeve rod (3) is connected to a handle (6), and a folding rod (7) is movably installed on the inner side of the handle (6). A small wheel (11) is installed at the lower end of the folding rod (7), and a button (8) and a clamping rod (9) are installed on the rod body of the other end of the folding rod (7), and the button (8) is connected to the clamping rod (9). A connecting plate (10) is movably installed on the upper and lower surfaces of the inner end of the folding rod (7), and grooves are provided at both ends of the connecting plate (10) at the upper end, and the grooves match the clamping rod (9).

2. A portable retractable stretcher according to claim 1, characterized in that: The lower end of the support column (15) is internally connected to a partition (34), the lower end of the support column (15) is internally movably sleeved with a buffer rod (20), the lower end of the buffer rod (20) is installed with a lower anti-slip foot (27), and a spring (35) is installed between the buffer rod (20) and the partition (34).

3. A portable retractable stretcher according to claim 2, characterized in that: The upper end of the support column (15) is movably sleeved with a threaded rod (17), the upper end of the threaded rod (17) is installed with an upper anti-slip foot (19), the outer end of the upper end of the support column (15) is movably sleeved with an adjusting button sleeve (16), and the annular groove provided inside the adjusting button sleeve (16) matches the circular ring protrusion (31) provided on the outer periphery of the support column (15).

4. A portable retractable stretcher according to claim 3, characterized in that: The upper end of the regulating knob sleeve (16) is internally connected with a threaded sleeve (30), the inner ring of the threaded sleeve (30) matches the threaded rod (17), and a sliding groove (32) is provided on the rod body of the threaded rod (17).

5. The portable retractable stretcher according to claim 4, characterized in that: A sleeve (18) is movably sleeved on the rod body of the threaded rod (17); the inner ring of the sleeve (18) is connected to a slider (33); the slider (33) matches the slide groove (32); an upper frame (13) is provided on the inner side of the sleeve (18); the four corners of the upper frame (13) match the sleeve; a driving motor (28) is installed on the outer side of the upper frame (13); and the outer periphery of the sleeve (18) is connected to an upper strap ring (23).

6. The portable retractable stretcher according to claim 3, characterized in that: A fixing sleeve (21) is sleeved and installed on the outer periphery of the lower end of the support column (15), a lower frame (12) is provided on the inner side of the fixing sleeve (21), and the four corners of the lower frame (12) match the fixing sleeve (21), and the inner sides of the lower frame (12) and the upper frame (13) are both connected with a shaft fixing sleeve (24).

7. The portable retractable stretcher according to claim 6, characterized in that: The interior of the shaft fixing sleeve (24) is movably sleeved with a shaft (25), and both ends of the shaft (25) are movably connected to the frame bodies of the lower frame (12) and the upper frame (13). One end of the shaft (25) at the upper end matches the transmission shaft of the drive motor (28), and a connecting column (14) is connected between the lower frame (12) and the upper frame (13).

8. The portable retractable stretcher according to claim 7, characterized in that: The two end rod bodies of the shaft rod (25) are connected with conveying rollers, and the outer periphery of the conveying rollers is sleeved with a conveying belt (26).

9. The portable retractable stretcher according to claim 8, characterized in that: The periphery of the conveyor belt (26) is connected with a buckle (29), and the buckle (29) matches the sleeve rod (3).

10. The portable retractable stretcher according to claim 6, characterized in that: The outer periphery of the fixing sleeve (21) is connected with a lower binding ring (22).

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