Fastening equipment for portable bed of ambulance

Abstract

The invention provides fastening equipment for a portable bed of an ambulance, and relates to the technical field of medical equipment. The fastening equipment for the portable bed of the ambulance comprises a bearing trolley, the bearing trolley comprises a trolley body, a mechanical arm rotating relative to the trolley body and a locking device, the trolley body is configured to be movably connected with a carriage of the ambulance, the moving direction is parallel to the length direction of the carriage, and the mechanical arm is configured to be detachably connected with the portable bed. The locking devices are located at the two ends of the vehicle width of the vehicle body, and the locking devices are configured to be fixedly connected with a wheel shaft of the portable bed in the locking state. Sliding or displacement is prevented when the vehicle runs, accelerates, decelerates or turns, instability and operation complexity of temporary fixing measures are avoided, and medical staff can transfer patients more efficiently and more safely.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a fastening device for a portable bed in an ambulance. Background Technology

[0002] In emergency medical care, portable beds are widely used as crucial patient transport tools to move injured people from accident scenes or medical facilities into ambulances. However, during ambulance travel, dynamic factors such as uneven roads, vehicle acceleration, deceleration, or turns often make it difficult to securely fix portable beds to the vehicle's floor, causing them to slide, tilt, or even tip over during transport. This instability not only increases the difficulty of operation for medical personnel and interferes with emergency care, but more seriously, it can cause patients to suffer additional physical injuries, such as collision injuries or crush injuries caused by bed displacement during bumpy rides, or secondary injuries such as fractures and soft tissue damage from falls. Summary of the Invention

[0003] The problem addressed by this invention is: how to improve the transport stability of portable beds in order to enhance patient safety.

[0004] To address the aforementioned problems, the present invention provides a fastening device for a portable bed in an ambulance, comprising a carrying trolley, the carrying trolley including a body, a robotic arm rotatably connected to the body, and a locking device. The body is configured to be movably connected to the ambulance compartment, and the direction of movement is parallel to the length direction of the compartment. The robotic arm is configured to be detachably connected to the portable bed. The locking device is located at both ends of the width of the body, and in the locked state, the locking device is configured to be fixedly connected to the wheel axles of the portable bed.

[0005] Optionally, the fastening device of the ambulance portable bed also includes a guide rail, which is connected to the bottom wall of the carriage and extends along the direction of movement, with the carriage body slidingly engaged with the guide rail.

[0006] Optionally, the guide rail includes a track body, a limiting block, a first push switch, and a linkage assembly. The limiting block is located at the end of the track body away from the door. The limiting block is rotatably connected to the track body and protrudes from the track body to engage with the vehicle body. The first push switch is connected to an input end of the linkage assembly, and the output end of the linkage assembly is connected to the limiting block to drive the limiting block to rotate relative to the track body so that the limiting block retracts into the track body.

[0007] Optionally, the guide rail further includes a second push switch and a connecting shaft, the second push switch being located at the end of the rail body away from the first push switch, and the connecting shaft being connected between the second push switch and another input end of the linkage assembly.

[0008] Optionally, the fastening device of the ambulance portable bed further includes an unloaded locking device. The unloaded unlocking device includes a locking block, a vehicle-mounted unlocking linkage assembly, and a guide rail unlocking linkage assembly. The locking block is located at one end of the track body near the door and protrudes from the track body to engage with the vehicle body. The input end of the vehicle-mounted unlocking linkage assembly is connected to the robotic arm, and the output end of the vehicle-mounted unlocking linkage assembly extends out of the vehicle body. The input end of the guide rail unlocking linkage assembly protrudes from the track body, and the output end of the guide rail unlocking linkage assembly is connected to the locking block. When the locking block engages with the vehicle body, the output end of the vehicle-mounted unlocking linkage assembly connects to the input end of the guide rail unlocking linkage assembly and is used to drive the output end of the guide rail unlocking linkage assembly to move, so that the locking block retracts into the track body.

[0009] Optionally, the carrying trolley further includes a drive device, which is rotatably connected to the vehicle body and drives the robotic arm to rotate relative to the vehicle body. In the direction of rotation of the robotic arm, there is an unloading position lower than the vehicle body. When the robotic arm rotates to the unloading position, the robotic arm disengages from the portable bed.

[0010] Optionally, the carrier trolley further includes an indicator device, the trigger end of which is disposed on the locking device. When the locking device locks the axle, the trigger end is triggered, and the indicator device gives a locked indication.

[0011] Optionally, the locking device includes a first deflection structure and a second deflection structure. The first deflection structure is rotatably connected to the vehicle body via a first spring. The first deflection structure is located below the second deflection structure and has a first arcuate groove at one end facing the second deflection structure. The first spring is configured to drive the first deflection structure to deflect counterclockwise. The second deflection structure is located above the first deflection structure and is rotatably connected to the vehicle body via a second spring. The second deflection structure has a second arcuate groove at one end facing the first deflection structure. The second spring is configured to drive the second deflection structure to deflect clockwise. When the two openings of the first and second arcuate grooves rotate to opposite sides, the first and second arcuate grooves enclose the axle, and the first and second deflection structures grip the axle tightly.

[0012] Optionally, the locking device further includes a third deflection structure, which is rotatably connected to the vehicle body via a third spring. The third spring is configured to drive the third deflection structure to rotate counterclockwise. The unlocking switch is connected to the third deflection structure and is used to overcome the elastic force of the third spring to drive the third deflection structure to rotate clockwise. The third deflection structure is located above the second deflection structure and engages with the second deflection structure under the action of the third spring to lock the first deflection structure and the second deflection structure in a locked state.

[0013] Optionally, the carrying trolley further includes a guide structure corresponding to the locking device. The guide structure includes a boss and a positioning groove. The boss extends along the moving direction and is located between the robotic arm and the positioning groove for sliding engagement with the wheel axle. The opening of the positioning groove faces the boss, and the actuating end of the locking device is located within the area enclosed by the positioning groove.

[0014] Compared with related technologies, the fastening device of the ambulance portable bed of the present invention is achieved by configuring the vehicle body to be movably connected to the ambulance compartment, with the direction of movement parallel to the length direction of the compartment. The vehicle body has the ability to move within the compartment to meet the needs of moving the portable bed within the compartment, and also to meet the needs of the robotic arm and locking device moving with the portable bed within the compartment. The robotic arm is configured to be detachably connected to the portable bed and can rotate relative to the vehicle body, so that the robotic arm can support the portable bed when rotated to a high position and can disengage from the portable bed when rotated to a low position, ensuring the load-bearing flexibility of the portable bed. Furthermore, by setting the locking device at both ends of the width of the vehicle body, the locking device is configured in the locked state to be aligned with the axles on both sides of the portable bed in the width direction. The fixed connection and locking device directly restricts the wheel axles of the portable bed during the movement of the ambulance. Through the coordinated action of the load-bearing trolley, robotic arm, and locking device, the portable bed is effectively fixed during the movement of the ambulance, thereby preventing unnecessary movement of the portable bed. In this way, it not only directly utilizes the structural strength and spatial layout of the ambulance compartment to provide a stable and dedicated fixing platform, but also ensures that when the portable bed is placed in the ambulance, the fastening device of the ambulance portable bed can quickly and reliably fix it, preventing slippage or displacement when the vehicle is moving, accelerating, decelerating, or turning. It avoids the instability and operational complexity of temporary fixing measures, enabling medical staff to transport patients more efficiently and safely. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the fastening device assembly for the ambulance portable bed in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the carrying trolley in an embodiment of the present invention; Figure 3 This is a schematic diagram of the locking device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the guide rail structure in an embodiment of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the guide rail structure in an embodiment of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the structure of the no-load locking device in an embodiment of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the no-load locking device in an embodiment of the present invention. Figure 2 .

[0016] Explanation of reference numerals in the attached figures: 100-Carrying trolley; 110-Car body; 120-Mechanical arm; 130-Locking device; 131-First deflection structure; 1311-First arc groove; 132-Second deflection structure; 1321-Second arc groove; 1322-Protrusion; 133-Third deflection structure; 1331-Front end; 134-Unlocking switch; 140-Drive device; 150-Indicating device; 160-Guide structure; 161-Boss; 162-Positioning groove; 200-Guide rail; 210-Rail body; 220-Limit block; 230-First push switch; 240-Linkage assembly; 241-Rotating block; 242-Connecting rod; 250-Second push switch; 260-Connecting shaft; 300-Unloaded locking device; 310-Locking block; 320-Vehicle unlocking linkage assembly; 321-Drive rod; 322-Drive block; 323-Vehicle swing block; 324-Connecting block; 330-Guide rail unlocking linkage assembly. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] In the attached figures, the X-axis represents left and right positions, with the positive direction of the X-axis representing the right side and the negative direction representing the left side; the Y-axis represents front and back positions, with the positive direction of the Y-axis representing the front and the negative direction representing the back; and the Z-axis represents up and down positions, with the positive direction of the Z-axis representing the top and the negative direction representing the bottom. It should be noted that the aforementioned representations of the X, Y, and Z axes are merely for the convenience of describing the invention and for simplifying the description, and 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 limiting the invention.

[0019] It should be noted that the terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0020] Combination Figure 1 As shown, this embodiment of the invention provides a fastening device for a portable bed in an ambulance, including a carrying trolley 100. The carrying trolley 100 includes a body 110, a robotic arm 120 rotatably connected to the body 110, and a locking device 130. The body 110 is configured to be movably connected to the ambulance compartment, and the direction of movement is parallel to the length direction of the compartment. The robotic arm 120 is configured to be detachably connected to the portable bed. The locking device 130 is located at both ends of the width of the body 110. In the locked state, the locking device 130 is configured to be fixedly connected to the wheel axles of the portable bed.

[0021] Specifically, a portable bed is a medical device primarily used for patient transport. A portable bed can be divided into a head end (patient's head position) and a foot end (patient's foot position). A portable bed typically includes a bed frame and a retractable frame connected to the bed frame. The retractable frame allows for height adjustment of the bed frame and movement on the ground via rollers. The vehicle body 110 is mounted inside the ambulance compartment, its direction of movement parallel to the length of the compartment. For example, the bottom of the vehicle body 110 may be equipped with multiple rollers or sliders that directly contact the floor of the ambulance compartment, allowing the vehicle body 110 to slide along the length of the compartment. At the foot-facing end of the vehicle body 110, i.e., the front end of the vehicle body 110, one end of a robotic arm 120 is rotatably connected to the front end of the vehicle body 110, and the other end of the robotic arm 120 extends forward. Supported by the vehicle body 110, the robotic arm 120 can swing up and down relative to the vehicle body 110. At both ends of the vehicle body 110 in the width direction, a locking device 130 is provided at each end, so that the distribution position of the locking device 130 corresponds to the position of the wheel axle of the portable bed. The locking device 130 can be a manually operated lever mechanism. When the operator moves the lever to the locked position, the claws or pins inside the lever will extend and directly engage or pass through the wheel axle of the portable bed, thereby firmly fixing the wheel axle. To unlock, the operator can move the lever in the opposite direction to retract the claws or pins, releasing the fixation of the wheel axle.

[0022] The usage process of the fastening device for the ambulance portable bed in this embodiment is as follows: Initially, the vehicle body 110 is stationary and locked to the rear side of the ambulance compartment (one end of the negative Y-axis). The locking device 130 locks the wheel axle of the portable bed. The robotic arm 120 is in an upward state to support and fix the portable bed. At this time, the portable bed is in a folded state. The portable bed remains stationary under the triple static cooperation of the robotic arm 120, the locking device 130, and the vehicle body 110. When arriving at the scene (patient's location or hospital) and needing to remove the portable bed from the carriage, the carriage door opens, and the carriage body 110 is released from its stationary state to allow movement. The robotic arm 120 and locking device 130 remain locked. The user pulls the portable bed out of the carriage, and the carriage body 110 is pulled to the carriage door along with the portable bed. Then, the portable bed unfolds, and the robotic arm 120 swings down to the bed body detached from the portable bed, disengaging from the bed body. Then, the user triggers the locking device 130 to change from the locked state to the unlocked state, and the locking device 130 releases the lock on the axle of the portable bed. The portable bed is completely detached from the carrying trolley 100, and the user can freely pull the portable bed.

[0023] When the portable bed needs to be moved into the ambulance, the carrying trolley 100 is locked at the door, the locking device 130 locks the axles of the portable bed, the robotic arm 120 rises, lifts the portable bed and lifts the wheels off the ground, the portable bed retracts, and the portable bed and carrying trolley 100 are connected as one unit. The user pushes the portable bed and carrying trolley 100 into the ambulance, and after they are fully pushed in, the carrying trolley 100 is locked at rest again inside the ambulance. During the movement of the ambulance, the portable bed remains stationary again under the triple static cooperation of the robotic arm 120, the locking device 130 and the vehicle body 110. In this case, the robotic arm 120 can be lowered appropriately so that the wheels of the portable bed contact the bottom wall of the ambulance.

[0024] Therefore, in this embodiment, the vehicle body 110 is configured to be movably connected to the ambulance compartment, and the direction of movement is parallel to the length direction of the compartment. The vehicle body 110 has the ability to move within the compartment to meet the needs of the portable bed moving within the compartment, and also to meet the needs of the robotic arm 120 and the locking device 130 moving with the portable bed within the compartment. The robotic arm 120 is configured to be detachably connected to the portable bed and can rotate relative to the vehicle body 110, so that the robotic arm 120 can carry the portable bed when rotated to a high position and can disengage from the portable bed when rotated to a low position, ensuring the carrying flexibility of the portable bed. Furthermore, by setting the locking device 130 at both ends of the width of the vehicle body 110, the locking device 130 is configured in the locked state to be aligned with the axles on both sides of the portable bed in the width direction. The fixed connection and locking device 130 directly restricts the wheel axles of the portable bed during the movement of the ambulance. During the movement of the ambulance, the portable bed is effectively fixed by the coordinated action of the carrying trolley 100, the robotic arm 120 and the locking device 130, thereby avoiding unnecessary movement of the portable bed. In this way, not only can the structural strength and spatial layout of the ambulance compartment be directly utilized to provide a stable and dedicated fixing platform, but also the fastening device of the ambulance portable bed can quickly and reliably fix it when it is placed in the ambulance, preventing slippage or displacement when the vehicle is moving, accelerating, decelerating or turning. This avoids the instability and operational complexity of temporary fixing measures, enabling medical staff to transfer patients more efficiently and safely.

[0025] Optionally, combined Figure 1 As shown, the fastening device of the ambulance portable bed also includes a guide rail 200, which is connected to the bottom wall of the carriage and extends along the direction of movement. The carriage body 110 slides in conjunction with the guide rail 200.

[0026] Specifically, the guide rail 200 is fixedly mounted to the bottom wall of the carriage, for example, by mechanical connection methods such as bolts, rivets, or welding. The extension direction of the guide rail 200 is consistent with the movement direction of the trolley.

[0027] Thus, by connecting the guide rail 200 to the bottom wall of the carriage and extending along the direction of movement, the guide rail 200 provides a clear and stable movement path for the carrying trolley 100, effectively restricting the lateral degree of freedom of the vehicle body 110, preventing it from swaying irregularly or deviating from the preset path during movement, thereby ensuring the smooth movement of the carrying trolley 100, avoiding impacts and vibrations caused by unstable movement, and thus significantly improving the stability of the portable bed when moving and fixing it in the ambulance, reducing the risk of secondary injury to the patient.

[0028] Optionally, combined Figure 4 and Figure 5As shown, the guide rail 200 includes a track body 210, a limiting block 220, a first push switch 230, and a linkage assembly 240. The limiting block 220 is located at the end of the track body 210 away from the door. The limiting block 220 is rotatably connected to the track body 210 and protrudes from the track body 210 to engage with the vehicle body 110. The first push switch 230 is connected to one input end of the linkage assembly 240, and the output end of the linkage assembly 240 is connected to the limiting block 220 and is used to drive the limiting block 220 to rotate relative to the track body 210 so that the limiting block 220 retracts into the track body 210.

[0029] Specifically, the end of the track body 210 furthest from the car door refers to the end of the track body 210 located in the car closer to the driver's cab. For example... Figure 5 As shown, the linkage assembly 240 includes a rotating block 241 and a connecting rod 242. The rotating block 241 is located inside the track body 210, with its middle portion rotatably connected to the track body 210. A portion of the circumferential end of the rotating block 241 serves as the input end of the linkage assembly 240. One end of the rotating block 241 is rotatably and slidably connected to one end of the connecting rod 242. Specifically, this can be achieved by opening an elongated hole in the connecting rod 242 and passing the connecting shaft of the two through the elongated hole. The other end of the connecting rod 242 is rotatably connected to one end of a limiting block 220, and the other end of the limiting block 220 is rotatably connected to the track body 210. A retaining spring is provided at the rotatable connection point of the limiting block 220. A through hole is provided in the track body 210, through which a portion of the limiting block 220 extends out of the track body 210. The first push switch 230 is slidably connected to the track body 210 along the extension direction of the track body 210, and one end of the first push switch 230 located inside the track body 210 is rotatably connected to one end of the rotating block 241 in the circumferential direction, so as to drive the rotating block 241 to rotate around the rotating axis in the middle.

[0030] The limiting process of the car body 110 is as follows: the car body 110 presses against the limiting block 220 and overcomes the elastic force of the spring to press the limiting block 220 into the track body 210. During this process, the connecting rod 242 moves downward relative to the rotating block 241 through its preset elongated hole. After the car body 110 passes the limiting block 220, the elastic force of the spring pops the limiting block 220 out, the connecting rod 242 resets, and the limiting block 220 engages with the car body 110 to fix the car body 110.

[0031] The unlocking process of the vehicle body 110 is as follows: The user presses the first press switch 230, the first press switch 230 moves into the track body 210, the movement of the first press switch 230 causes the rotating block 241 to rotate clockwise, the rotating block 241 drives the connecting rod 242 to move downward, the connecting rod 242 overcomes the elastic force of the spring and causes the limiting block 220 to rotate into the track body 210, releasing the connection between the limiting block 220 and the vehicle body 110, thereby unlocking the vehicle body 110.

[0032] Thus, by positioning the limiting block 220 at the end of the track body 210 away from the door and protruding from the track body 210 to engage with the car body 110, the limiting block 220 can achieve the limiting engagement of the car body 110 deep inside the car, thereby fixing the car body 110 deep inside the car. The limiting block 220 is rotatably connected to the track body 210, and the first push switch 230 is connected to one input end of the linkage assembly 240. The output end of the linkage assembly 240 is connected to the limiting block 220 to drive the limiting block 220 to rotate relative to the track body 210 so that the limiting block 220 retracts into the track body 210. The pressing action of the first push switch 230 can be converted into the rotation of the limiting block 220 through the linkage assembly 240. Thus, deep inside the car, the user can directly lock the car body 110 by pressing the first push switch 230, thereby improving ease of use.

[0033] Optionally, combined Figure 5 As shown, the guide rail 200 also includes a second push switch 250 and a connecting shaft 260. The second push switch 250 is located at the end of the rail body 210 away from the first push switch 230, and the connecting shaft 260 is connected between the second push switch 250 and the other input end of the linkage assembly 240.

[0034] Specifically, the end of the track body 210 furthest from the first push-button switch 230 refers to the carriage door. One end of the connecting shaft 260 is connected to the second push-button switch 250, and the other end is connected to the other end of the rotating block 241 in the circumferential direction. The unlocking process of the carriage body 110 can also be as follows: the user stands at the carriage door and directly presses the second push-button switch 250. The second push-button switch 250 drives the rotating block 241 to rotate clockwise through the connecting shaft 260, thereby unlocking the carriage body 110 at the carriage door. The reset of the push-button switch can be achieved using existing spring reset methods, which will not be elaborated in this embodiment.

[0035] Thus, by having the second push switch 250 located at the end of the track body 210 away from the first push switch 230, and the connecting shaft 260 connected between the second push switch 250 and the other input end of the linkage assembly 240, the user can unlock the car body 110 directly from outside the car. This provides two unlocking positions on the track body 110, further facilitating user access and improving efficiency.

[0036] Optionally, combined Figure 6 and Figure 7As shown, the fastening device of the ambulance portable bed also includes an unloaded locking device 300. The unloaded unlocking device 300 includes a locking block 310, a vehicle-mounted unlocking linkage assembly 320, and a guide rail unlocking linkage assembly 330. The locking block 310 is located at the end of the track body 210 near the door and protrudes from the track body 210 to engage with the vehicle body 110. The input end of the vehicle-mounted unlocking linkage assembly 320 is connected to the robotic arm 120. The input end of the vehicle-mounted unlocking linkage assembly 320... The output end extends out of the vehicle body 110, the input end of the guide rail unlocking linkage assembly 330 protrudes out of the track body 210, and the output end of the guide rail unlocking linkage assembly 330 is connected to the locking block 310. When the locking block 310 is engaged with the vehicle body 110, the output end of the vehicle-mounted unlocking linkage assembly 320 is connected to the input end of the guide rail unlocking linkage assembly 330, and drives the output end of the guide rail unlocking linkage assembly 330 to move so that the locking block 310 retracts into the track body 210.

[0037] Specifically, such as Figure 7 As shown, the vehicle-mounted unlocking linkage assembly 320 includes a drive rod 321, a drive block 322, a vehicle-mounted swing block 323, and a connecting block 324. One end of the drive rod 321 is rotatably connected to the robotic arm 120, and the rotatable connection is located below the rotatable connection between the robotic arm 120 and the vehicle body 110. The other end of the drive rod 321 is rotatably connected to one end of the drive block 322, and the other end of the drive block 322 is rotatably connected to the vehicle body 110. The vehicle-mounted swing block 323 is placed horizontally, and one end of the vehicle-mounted swing block 323 is connected to the drive block 322 through a spring (not shown). The other end of the vehicle-mounted swing block 323 is rotatably connected to the vehicle body 110. The connecting block 324 is connected to the middle of the vehicle-mounted swing block 323 and is slidably connected to the vehicle body 110. The lower end of the connecting block 324 extends from the lower end of the vehicle body 110. The locking block 310 is located at one end of the track body 210 near the door. The locking block 310 protrudes from the track body 210 and is rotatably connected to the track body 210.

[0038] When the locking block 310 is engaged with the vehicle body 110 under no-load conditions, the unlocking process of the vehicle body 110 is as follows: the user is outside the carriage and rotates the mechanical arm 120 upward. The upward rotation of the mechanical arm 120 causes the drive rod 321 to move forward (positive Y-axis direction). The drive rod 321 causes the drive block 322 to rotate. The drive block 322 pulls the vehicle-mounted swing block 323 through the spring. The vehicle-mounted swing block 323 swings horizontally and drives the connecting block 324 (i.e., the output end of the vehicle-mounted unlocking linkage assembly 320) to move forward. The connecting block 324 drives the guide rail unlocking linkage assembly 330 to move forward. The guide rail unlocking linkage assembly 330 drives the locking block 310 to rotate into the track body 210. The vehicle body 110 can be manually pushed into the depth of the carriage.

[0039] Thus, by positioning the locking block 310 at the end of the track body 210 near the door and protruding from the track body 210 to engage with the car body 110, the locking block 310 locks the car body 110 at the door. It is connected to the robotic arm 120 via the input end of the onboard unlocking linkage assembly 320, with the output end of the onboard unlocking linkage assembly 320 extending out of the car body 110. The input end of the guide rail unlocking linkage assembly 330 protrudes from the track body 210, and its output end is connected to the locking block 310. The upward rotation of the robotic arm 120 is converted into the movement of the output end of the vehicle-mounted unlocking linkage assembly 320. When the locking block 310 is engaged with the vehicle body 110, the output end of the vehicle-mounted unlocking linkage assembly 320 is connected to the input end of the guide rail unlocking linkage assembly 330, so that the upward rotation of the robotic arm 120 is further converted into the movement of the output end of the vehicle-mounted unlocking linkage assembly 320, thereby releasing the connection between the locking block 310 and the vehicle body 110, thus enabling the vehicle body 110 to move under no-load conditions, thereby improving ease of use.

[0040] Optionally, combined Figure 1 and Figure 2 As shown, the carrying trolley 100 also includes a drive device 140, which is rotatably connected to the trolley body 110 and drives the robotic arm 120 to rotate relative to the trolley body 110. In the rotation direction of the robotic arm 120, there is an unloading position lower than the trolley body 110. When the robotic arm 120 rotates to the unloading position, the robotic arm 120 disengages from the portable bed.

[0041] Specifically, the drive unit 140 can be a hydraulic or pneumatic actuator, which drives the mechanical arm 120 to rotate relative to the vehicle body 110 through the extension and retraction of the hydraulic cylinder or the air cylinder.

[0042] The descent unloading position is a specific angle or position preset during the rotation of the robotic arm 120. When the robotic arm 120 reaches this position, its connection with the portable bed will be automatically released. For example, limit switches or photoelectric sensors can be set on the rotation path of the robotic arm 120. When the robotic arm 120 rotates to the preset descent unloading position, the sensor is triggered, thereby issuing a command to release the connection. Alternatively, the encoder or angle sensor inside the drive device 140 can accurately detect the rotation angle of the robotic arm 120. When the preset descent unloading angle is reached, the system automatically performs the disconnection operation.

[0043] Thus, by driving the robotic arm 120 to rotate relative to the vehicle body 110 through the drive device 140, the robotic arm 120 can be rotated automatically, thereby eliminating the cumbersome and inconvenient traditional manual operation of the robotic arm 120. In the direction of rotation of the robotic arm 120, there is a lower unloading position below the vehicle body 110. When the robotic arm 120 rotates to the lower unloading position, the robotic arm 120 is disconnected from the portable bed, making the loading and unloading process of the portable bed more efficient and convenient, avoiding the inefficiency or operational errors that may be caused by manual operation, and significantly improving the automation level and user experience of the ambulance portable bed fastening equipment.

[0044] Optionally, combined Figure 1 As shown, the trolley 100 also includes an indicator device 150. The trigger end of the indicator device 150 is disposed on the locking device 130. When the locking device 130 locks the wheel axle, the trigger end is triggered, and the indicator device 150 makes a locking indication.

[0045] Specifically, the indicating device 150 can be implemented in various forms. For example, it can be a visual indicator, such as a light-emitting diode (LED) lamp, an indicator panel, or a small display screen, which visually displays the locking status through color changes, flashing patterns, or text information. The trigger end of the indicating device 150 can be a mechanical microswitch. When the locking device 130 completes the locking action, a component of it (such as the latch or clamping mechanism) will physically contact and press down the switch, thereby generating an electrical signal. Alternatively, the trigger end can also be a proximity sensor, such as a photoelectric sensor, a Hall sensor, or an inductive sensor. When a specific component of the locking device 130 moves to a preset locking position, the sensor can detect the presence or positional change of the component and output a corresponding signal.

[0046] When the locking device 130 locks the wheel axle of the portable bed, if the indicator 150 is a visual indicator, the LED light may change from red to green, or become constantly lit, or display the words "locked" after the trigger end is triggered. If the indicator 150 is an auditory indicator, the buzzer may emit a short beep after the second trigger end is triggered, or play a voice prompt saying "locking successful".

[0047] Thus, by setting the trigger end of the indicator device 150 to the locking device 130, and triggering the indicator device 150 when the locking device 130 locks the axle, the indicator device 150 can issue a locking indication. This allows for real-time and accurate detection of whether the locking device 130 has successfully locked the axle of the portable bed, enabling users to intuitively confirm the fixed status of the portable bed and avoiding problems of insecure fixing caused by inaccurate visual judgment or missed operations. Simultaneously, when the locking device 130 successfully locks the axle, the indicator device 150 will immediately issue a clear locking indication, eliminating user doubts about the locking status and significantly improving the safety and reliability of the equipment operation. This not only effectively reduces the risk of the portable bed moving during ambulance movement but also minimizes the possibility of secondary injury to the patient, thereby improving the overall user-friendliness and safety of the ambulance portable bed fastening equipment.

[0048] Optionally, combined Figure 1 and Figure 3 As shown, the locking device 130 includes a first deflection structure 131 and a second deflection structure 132. The first deflection structure 131 is rotatably connected to the vehicle body 110 via a first retaining spring. The first deflection structure 131 is located below the second deflection structure 132 and has a first arcuate groove 1311 at one end facing the second deflection structure 132. The first retaining spring is configured to drive the first deflection structure 131 to deflect counterclockwise. The second deflection structure 132 is located above the first deflection structure 131. The deflecting structure 132 is rotatably connected to the vehicle body 110 via a second spring. The end of the second deflecting structure 132 facing the first deflecting structure 131 is provided with a second arc groove 1321. The second spring is configured to drive the second deflecting structure 132 to deflect clockwise. When the two openings of the first arc groove 1311 and the second arc groove 1321 rotate to opposite sides, the first arc groove 1311 and the second arc groove 1321 enclose the wheel axle, and the first deflecting structure 131 and the second deflecting structure 132 tightly hug the wheel axle.

[0049] Specifically, this embodiment will be described using the locking device 130 located in the positive X-axis direction, such as... Figure 1 and Figure 3 As shown, the first deflection structure 131 is located below the second deflection structure 132. The first deflection structure 131 is rotatably mounted on the vehicle body 110 via a connecting shaft, and a first spring is mounted at its rotatable connection. One end of the first spring is fixed to the vehicle body 110, and the other end acts on the first deflection structure 131. The first spring is configured to drive the first deflection structure 131 to deflect counterclockwise, that is, the elastic force of the first spring has the ability to drive the first deflection structure 131 to rotate counterclockwise.

[0050] The second deflection structure 132 is similar to the first deflection structure 131. The second deflection structure 132 is rotatably mounted on the vehicle body 110 via a connecting shaft, and a second spring is mounted at its rotatable connection. One end of the second spring is fixed to the vehicle body 110, and the other end acts on the second deflection structure 132. The second spring is configured to drive the second deflection structure 132 to deflect clockwise, that is, the elastic force of the second spring has the ability to drive the second deflection structure 132 to rotate clockwise.

[0051] like Figure 3 As shown, the first deflection structure 131 has a first arc groove 1311 at one end near the second deflection structure 132, and the second deflection structure 132 has a second arc groove 1321 at one end near the first deflection structure 131. In the Y-axis direction, the rear end of the second arc groove 1321 extends into the first arc groove 1311 and slides with the rear end of the first arc groove 1311.

[0052] When the locking device 130 releases the wheel axle lock of the portable bed, under the elastic force of the first spring, the first deflection structure 131 deflects counterclockwise by a certain angle, causing the opening of the first arc groove 1311 to deflect counterclockwise, that is, the opening of the first arc groove 1311 rotates forward. At the same time, under the elastic force of the second spring, the second deflection structure 132 deflects clockwise by a certain angle, causing the opening of the second arc groove 1321 to deflect clockwise, that is, the opening of the second arc groove 1321 also rotates forward. During the rotation of the first deflection structure 131 and the second deflection structure 132, the rear ends of the second arc groove 1321 and the first arc groove 1311 can slide and engage with each other to guide the rotation of the first deflection structure 131 and the second deflection structure 132. Meanwhile, the front ends of the first deflection structure 131 and the second deflection structure 132 move away from each other during the rotation to achieve the "opening" of the locking device 130. The rotation angle is sufficient to allow the wheel axle of the portable bed to enter between the first arc groove 1311 and the second arc groove 1321; no detailed requirements are specified here.

[0053] Because the rear end of the second arc groove 1321 slides into the rear end of the first arc groove 1311, when the axle of the portable bed enters the limiting space between the second arc groove 1321 and the first arc groove 1311 from the open end at the front end and impacts the rear end of the second arc groove 1321, the axle of the portable bed can overcome the elastic force of the second spring and drive the second arc groove 1321 to rotate counterclockwise. At the same time, under the action of the front end of the second arc groove 1321, the first arc groove 1311 rotates clockwise. When the axle of the portable bed moves into place, the two openings of the first arc groove 1311 and the second arc groove 1321 are configured to be completely opposite, that is, the rear ends of the first arc groove 1311 and the second arc groove 1321 approach and close, the first arc groove 1311 and the second arc groove 1321 surround the axle, and the first deflection structure 131 and the second deflection structure 132 hold the axle tightly to achieve the "closing" of the locking device 130.

[0054] Thus, by driving the first deflection structure 131 and the second deflection structure 132 respectively through the first and second retaining springs, they deflect in opposite directions, forming an upper and lower clamping grip on the wheel axle. This makes the locking process adaptive and reliable. When the wheel axle enters the locking area, the first deflection structure 131 and the second deflection structure 132 automatically close under the elastic force of the two retaining springs. The first arc groove 1311 and the second arc groove 1321 can tightly surround the wheel axle, providing multi-point contact and uniform clamping force, effectively avoiding the problem of insecure locking. At the same time, due to the preload of the retaining springs, even when encountering bumps during the ambulance's movement, it can maintain a stable clamping grip on the wheel axle, significantly reducing the risk of displacement of the portable bed during movement, thereby effectively preventing secondary injury to the patient.

[0055] Optionally, combined Figure 1 and Figure 3 As shown, the locking device 130 also includes a third deflection structure 133, which is rotatably connected to the vehicle body 110 via a third spring. The third spring is configured to drive the third deflection structure 133 to rotate counterclockwise. The unlocking switch 134 is connected to the third deflection structure 133 and is used to overcome the elastic force of the third spring to drive the third deflection structure 133 to rotate clockwise. The third deflection structure 133 is located above the second deflection structure 132 and engages with the second deflection structure 132 under the action of the third spring to lock the first deflection structure 131 and the second deflection structure 132 in a clamped state.

[0056] Specifically, such as Figure 3As shown, similar to the second deflection structure 132 and the first deflection structure 131, the third deflection structure 133 is located above the second deflection structure 132 and is rotatably mounted on the vehicle body 110 via a connecting shaft. A third spring is provided at its rotatable connection point. One end of the third spring is fixed to the vehicle body 110, and the other end acts on the third deflection structure 133. The third spring is configured to drive the third deflection structure 133 to rotate counterclockwise; that is, the elastic force of the third spring has the ability to drive the third deflection structure 133 to rotate counterclockwise. A sliding fit surface is provided at the end of the third deflection structure 133 facing the second deflection structure 132, such as... Figure 3 As shown, the third deflection structure 133 has an overall shape resembling a flat Y-shape. A sliding mating surface is located on the lower side of the third deflection structure 133, and the sliding mating surface has a concave arc shape with its opening facing the second deflection structure 132. The second deflection structure 132 has a protrusion 1322, which slides with the sliding mating surface. As described above, when the second deflection structure 132 rotates counterclockwise, the protrusion 1322 slides with the sliding mating surface, and the protrusion 1322 can slide from the rear end of the sliding mating surface to the front end 1331 of the sliding mating surface. As the second deflection structure 132 rotates counterclockwise, the protrusion 1322 slides to the front end 1331 of the sliding mating surface. When the second deflection structure 132 is connected to the wheel axle of the portable bed, the protrusion 1322 slides out from the front end of the sliding mating surface. Due to the elastic force of the third spring, the front end 1331 of the sliding mating surface abuts against the bottom of the protrusion 1322. Because the second spring causes the second deflection structure 132 to rotate clockwise, the front end 1331 of the sliding mating surface and the bottom of the protrusion 1322 are locked together, forming a... Figure 3 The first deflection structure 131 and the second deflection structure 132 are positioned such that the elastic force of the third spring locks the first deflection structure 131 and the second deflection structure 132 in a clamped state, and the third deflection structure 133 interlocks with the second deflection structure 132. When it is necessary to "open" the locking device 130, the user swings the unlocking switch 134. The unlocking switch 134 can drive the third deflection structure 133 to deflect clockwise through the connecting structure to release the engagement between the front end 1331 of the sliding mating surface and the protrusion 1322, so that the protrusion 1322 can slide and engage with the sliding mating surface again.

[0057] Thus, when unlocking is required, the user can directly operate the unlocking switch 134. The unlocking switch 134 rotates in conjunction with the vehicle body 110, and its operation drives the third deflection structure 133 connected to it. The third deflection structure 133, by overcoming the spring force of the third retaining spring, rotates from its counter-clockwise locked state to its clockwise unlocked state. In the unlocked state, the engagement between the third deflection structure 133 and the second deflection structure 132 is released, thereby releasing the restriction on the second deflection structure 132. Once the second deflection structure 132 is released, it can deflect clockwise under the action of the second retaining spring, causing the second arc groove 1321 to separate from the first arc groove 1311, thereby releasing the grip on the wheel axle. This design avoids the use of additional tools, simplifies the operation process, and improves response speed and operational efficiency in emergency situations. Meanwhile, the presence of the third spring ensures that the third deflection structure 133 can automatically reset and remain engaged with the second deflection structure 132 when not in operation, thereby maintaining the reliable locking state of the locking device 130, effectively preventing the portable bed from moving unexpectedly during the ambulance's movement, and ensuring the patient's safety.

[0058] Optionally, combined Figure 1 As shown, the carrier trolley 100 also includes a guide structure 160, which corresponds to the locking device 130. The guide structure 160 includes a boss 161 and a positioning groove 162. The boss 161 extends along the moving direction and is located between the robotic arm 120 and the positioning groove 162 for sliding engagement with the wheel axle. The opening of the positioning groove 162 faces the boss 161, and the actuating end of the locking device 130 is located within the area enclosed by the positioning groove 162.

[0059] Specifically, the actuating end of the locking device 130 refers to the first deflection structure 131 and the second deflection structure 132 mentioned above. The boss 161 can be designed as a sloped surface or an arc surface with a smooth transition. The positioning groove 162 can be U-shaped, with its opening facing the boss 161.

[0060] As the user pushes the portable bed, the wheel axle of the portable bed slides along the boss 161. The boss 161 guides the movement of the portable bed so as to accurately push the portable bed into the positioning groove 162. Within the area enclosed by the positioning groove 162, the first deflection structure 131 and the second deflection structure 132 lock the wheel axle of the portable bed.

[0061] Thus, when the portable bed is pushed into the ambulance compartment, its axles first contact and slide along the protrusion 161 on the carrying trolley 100. The extended design of the protrusion 161 ensures that the axle is initially guided during movement, preventing lateral displacement of the axle before entering the locking area. Subsequently, guided by the protrusion 161, the axle smoothly slides into the positioning groove 162. Since the opening of the positioning groove 162 faces the protrusion 161 and its shape matches the axle, the axle can be precisely confined within the area enclosed by the positioning groove 162. At this time, the actuating end of the locking device 130 is located within the area of ​​the positioning groove 162, thereby ensuring that the axle can be accurately aligned with the locking device 130, greatly improving the success rate and efficiency of the locking operation. This allows the portable bed to be quickly, stably, and reliably secured during the movement of the ambulance, thus avoiding secondary injuries to the patient that may be caused by insecure fixation and improving the safety of medical equipment inside the ambulance.

[0062] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A fastening device for a portable ambulance bed, characterized in that, The device includes a carrying trolley (100), which includes a body (110), a robotic arm (120) rotatably connected to the body (110), and a locking device (130). The body (110) is configured to be movably connected to the compartment of an ambulance, and the direction of movement is parallel to the length direction of the compartment. The robotic arm (120) is configured to be detachably connected to a portable bed. The locking device (130) is located at both ends of the width of the body (110), and the locking device (130) is configured to be fixedly connected to the wheel axle of the portable bed in the locked state.

2. The fastening device for the ambulance portable bed according to claim 1, characterized in that, It also includes a guide rail (200), which is connected to the bottom wall of the carriage and extends along the direction of movement, and the vehicle body (110) slides in cooperation with the guide rail (200).

3. The fastening device for the ambulance portable bed according to claim 2, characterized in that, The guide rail (200) includes a track body (210), a limiting block (220), a first push switch (230), and a linkage assembly (240). The limiting block (220) is located at the end of the track body (210) away from the door. The limiting block (220) is rotatably connected to the track body (210) and protrudes from the track body (210) to engage with the vehicle body (110). The first push switch (230) is connected to one input end of the linkage assembly (240). The output end of the linkage assembly (240) is connected to the limiting block (220) to drive the limiting block (220) to rotate relative to the track body (210) so that the limiting block (220) retracts into the track body (210).

4. The fastening device for the ambulance portable bed according to claim 3, characterized in that, The guide rail (200) also includes a second push switch (250) and a connecting shaft (260). The second push switch (250) is located at one end of the rail body (210) away from the first push switch (230), and the connecting shaft (260) is connected between the second push switch (250) and another input end of the linkage assembly (240).

5. The fastening device for the ambulance portable bed according to claim 3, characterized in that, It also includes an unloaded locking device (300), which includes a locking block (310), a vehicle-mounted unlocking linkage assembly (320), and a guide rail unlocking linkage assembly (330). The locking block (310) is located at one end of the track body (210) near the door and protrudes from the track body (210) to engage with the vehicle body (110). The input end of the vehicle-mounted unlocking linkage assembly (320) is connected to the robotic arm (120), and the output end of the vehicle-mounted unlocking linkage assembly (320) extends out of the vehicle body (110). 10) The input end of the guide rail unlocking linkage assembly (330) protrudes from the track body (210), and the output end of the guide rail unlocking linkage assembly (330) is connected to the locking block (310). When the locking block (310) is engaged with the vehicle body (110), the output end of the vehicle-mounted unlocking linkage assembly (320) is connected to the input end of the guide rail unlocking linkage assembly (330) and is used to drive the output end of the guide rail unlocking linkage assembly (330) to move so that the locking block (310) retracts into the track body (210).

6. The fastening device for the ambulance portable bed according to claim 1, characterized in that, The carrying trolley (100) also includes a drive device (140), which is rotatably connected to the vehicle body (110) and drives the robotic arm (120) to rotate relative to the vehicle body (110). In the rotation direction of the robotic arm (120), there is an unloading position lower than the vehicle body (110). When the robotic arm (120) rotates to the unloading position, the robotic arm (120) disengages from the portable bed.

7. The fastening device for the ambulance portable bed according to claim 1, characterized in that, The carrier trolley (100) also includes an indicator device (150), the trigger end of which is disposed on the locking device (130). When the locking device (130) locks the axle, the trigger end is triggered and the indicator device (150) makes a locking indication.

8. The fastening device for the ambulance portable bed according to claim 7, characterized in that, The locking device (130) includes a first deflection structure (131) and a second deflection structure (132). The first deflection structure (131) is rotatably connected to the vehicle body (110) via a first retaining spring. The first deflection structure (131) is located below the second deflection structure (132) and has a first arc groove (1311) at one end facing the second deflection structure (132). The first retaining spring is configured to drive the first deflection structure (131) to deflect counterclockwise. The second deflection structure (132) is located above the first deflection structure (131). 132) The second deflection structure (132) is rotatably connected to the vehicle body (110) via a second spring. The second deflection structure (132) is provided with a second arc groove (1321) at one end facing the first deflection structure (131). The second spring is configured to drive the second deflection structure (132) to deflect clockwise. When the two slots of the first arc groove (1311) and the second arc groove (1321) rotate to opposite, the first arc groove (1311) and the second arc groove (1321) enclose the wheel axle, and the first deflection structure (131) and the second deflection structure (132) hug the wheel axle.

9. The fastening device for the ambulance portable bed according to claim 8, characterized in that, The locking device (130) further includes a third deflection structure (133), which is rotatably connected to the vehicle body (110) via a third spring. The third spring is configured to drive the third deflection structure (133) to rotate counterclockwise. The unlocking switch (134) is connected to the third deflection structure (133) and is used to overcome the elasticity of the third spring to drive the third deflection structure (133) to rotate clockwise. The third deflection structure (133) is located above the second deflection structure (132) and engages with the second deflection structure (132) under the action of the third spring to lock the first deflection structure (131) and the second deflection structure (132) in a clamped state.

10. The fastening device for the ambulance portable bed according to claim 1, characterized in that, The carrier trolley (100) also includes a guide structure (160), which corresponds to the locking device (130). The guide structure (160) includes a boss (161) and a positioning groove (162). The boss (161) extends along the moving direction and is located between the robotic arm (120) and the positioning groove (162) for sliding engagement with the wheel axle. The opening of the positioning groove (162) faces the boss (161), and the actuating end of the locking device (130) is located within the area enclosed by the positioning groove (162).

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