Foldable height-adjustable emergency stretcher

Abstract

This utility model discloses an adjustable-height folding emergency stretcher, belonging to the field of medical device technology. It includes a stretcher body, an adjustment mechanism, and a folding and fixing mechanism. The adjustment mechanism drives a slider by rotating a threaded rod, causing a scissor structure composed of support rods to rise and fall to adjust the height. The threaded rods on both sides are synchronously transmitted through universal joints and limiting telescopic rods. The folding and fixing mechanism uses a spring-driven inclined circular locking block that engages with a circular groove to achieve the unfolding and locking of the stretcher body and rapid folding. This utility model achieves stable height adjustment and rapid folding, with a compact and reliable structure, significantly improving the flexibility, convenience, and safety of rescue and transportation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a height-adjustable folding emergency stretcher. Background Technology

[0002] Emergency stretchers are indispensable medical equipment in emergency centers, hospitals, and various rescue scenarios. Their main function is to safely and quickly transfer the wounded.

[0003] In actual rescue and transfer processes, there is often a height difference between the location of the injured person and the target location to be transferred. For example, the injured person may be lying on the ground, while the stretcher in the ambulance or the hospital bed has a certain height. Traditional emergency stretchers usually have a simple structure and the height of their load-bearing surface is fixed. When using such a fixed-height stretcher to transfer the injured person, medical staff need to bend over or lift to make up for the height difference. This not only increases the labor intensity of medical staff and is prone to causing back injuries, but may also cause secondary injuries to the injured person due to unstable posture during lifting or moving.

[0004] In addition, emergency equipment has high requirements for portability and space utilization. Emergency stretchers need to be stored in ambulances with limited space or moved through complex environments such as narrow corridors and elevators. Traditional one-piece stretchers, due to their fixed structure and large length and width, not only occupy a lot of storage space, but are also very cumbersome when being transported and passing through narrow spaces, affecting rescue efficiency. Although some foldable stretchers have appeared on the market, they often sacrifice structural strength and most do not have height adjustment function, making their function relatively simple.

[0005] Therefore, this utility model proposes a height-adjustable folding emergency stretcher to address the shortcomings of existing technologies. Summary of the Invention

[0006] In view of the problems in the existing technology where the fixed height of the emergency stretcher makes it inconvenient to transfer the wounded and the fixed structure results in a large space occupation for storage and transportation, the present invention aims to provide an adjustable height folding emergency stretcher with an improved structure that can effectively solve the above problems.

[0007] This utility model provides an adjustable height folding emergency stretcher, comprising: a stretcher body, which includes a stretcher one and a stretcher two pivotally connected by a connecting plate; an adjustment mechanism, which includes a movable seat, a support rod one rotatably connected to the movable seat by a connecting block one, and a support rod two rotatably connected to the bottom of the stretcher body by a connecting block two; a folding and fixing mechanism; and also includes a slider and a threaded rod.

[0008] The slider is slidably disposed along the movable seat and is threadedly engaged with the threaded rod.

[0009] Furthermore, the slider is rotatably connected to the end of the second support rod, and the first support rod and the second support rod are rotatably connected by a rotating shaft; the folding and fixing mechanism is provided with a slanted circular locking block that can move between the locked position and the unlocked position. When the slanted circular locking block is in the locked position, it is locked into the circular groove of the first stretcher to restrict the relative rotation of the first stretcher and the second stretcher.

[0010] Preferably, the top of the support rod is also rotatably connected to the bottom of the stretcher body via a connecting block.

[0011] Preferably, the adjustment mechanism further includes a throttle, which is fixedly connected to the end of the threaded rod for driving its rotation.

[0012] Preferably, the adjustment mechanism has two sets of threaded rods arranged symmetrically on the left and right, and the two sets of threaded rods are connected by a universal joint, a limiting telescopic rod and a universal joint.

[0013] Preferably, the length of the limiting telescopic rod is extendable.

[0014] Preferably, the folding and fixing mechanism further includes a pull plate and a spring, the pull plate being connected to the inclined circular locking block, and the spring acting on the inclined circular locking block to drive it toward the locking position.

[0015] Preferably, the movable seat is provided with a slide groove, and the slider is slidably disposed in the slide groove.

[0016] Preferably, the connecting plate of the folding and fixing mechanism is provided with a second sliding groove, and the oblique circular block is slidably disposed in the second sliding groove.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problem of the fixed height of existing emergency stretchers, which makes it inconvenient to operate when transferring the injured to beds or ambulances of different heights. It achieves the technical effect of being able to adjust the overall height of the stretcher smoothly and effortlessly according to actual needs, thereby improving the efficiency and flexibility of rescue and transportation.

[0018] This utility model solves the problems of traditional stretchers being simple in structure, large in size, and inconvenient to carry and store by setting a folding and fixing mechanism composed of a pull plate, spring, oblique circular locking block and circular groove. It achieves the technical effect of enabling the stretcher to be folded quickly to reduce the space occupied, and automatically locking when unfolded, with a stable and reliable structure to prevent accidental folding and ensure safety in use.

[0019] This utility model cleverly solves the structural interference and transmission problems of achieving synchronous lifting and lowering on both sides in a folding structure by using a universal joint and a limiting telescopic rod to connect the threaded rods on both sides. This achieves the technical effect of ensuring that the stretcher remains stable during lifting and lowering, eliminating the risk of unilateral tilting, and perfectly compatible with the folding function, making the overall design more compact and reasonable. Attached Figure Description

[0020] Figure 1 This is a perspective view of an adjustable-height folding emergency stretcher proposed in this utility model. Figure 2 This is a partial structural diagram of an adjustable-height folding emergency stretcher proposed in this utility model; Figure 3 This is a partial structural exploded view of an adjustable-height folding emergency stretcher proposed in this utility model; Figure 4 This is a partial exploded view of the adjustable-height folding emergency stretcher proposed in this utility model.

[0021] Legend: 1. Stretcher 1; 2. Stretcher 2; 3. Adjustment mechanism; 301. Moving seat; 302. Connecting block 1; 303. Support rod 1; 304. Rotating shaft; 305. Connecting block 2; 306. Support rod 2; 307. Sliding block; 308. Slide groove 1; 309. Threaded rod; 310. Turning handle; 311. Universal joint 1; 312. Limiting telescopic rod; 313. Universal joint 2; 4. Folding and fixing mechanism; 401. Connecting plate; 402. Slide groove 2; 403. Spring; 404. Inclined circular locking block; 405. Pull plate; 406. Circular groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example: Please refer to Figures 1 to 4 This utility model provides an adjustable height folding emergency stretcher, which aims to solve the problems of fixed height of emergency stretchers in the prior art, which makes transfer inconvenient and lack of folding function, which makes storage and transportation difficult.

[0024] like Figures 1 to 4As shown, the height-adjustable folding emergency stretcher includes a stretcher body and an adjustment mechanism 3 located below the stretcher body and supporting it. The stretcher body is composed of a stretcher 1 and a stretcher 2, which are pivotally connected by a connecting plate 401 so that they can rotate and fold relative to each other. The adjustment mechanism 3 includes a movable seat 301 as a base, one end of a support rod 303 is rotatably connected to the movable seat 301 via a connecting block 302, and one end of a support rod 306 is rotatably connected to the bottom of the stretcher body via a connecting block 305.

[0025] To achieve height adjustment, the adjustment mechanism 3 also includes a slider 307 and a threaded rod 309 that is threadedly engaged with the slider 307. The slider 307 and the threaded rod 309 form a specific structural fit and transmission connection with the aforementioned movable seat 301 and support rod.

[0026] Please refer to the following carefully. Figures 2 to 4 The lifting drive structure is described in detail below: The movable seat 301 is provided with a slide groove 308, and the slider 307 is slidably connected in the slide groove 308. The threaded rod 309 is rotatably mounted on the movable seat 301 and passes through the slider 307 to form a threaded engagement with it. The slider 307 is rotatably connected to the end of the support rod 306. The support rod 303 and the support rod 306 are cross-connected by a rotating shaft 304 to form a scissor support structure. This structure allows the rotational motion of the threaded rod 309 to be converted into the linear motion of the slider 307 along the slide groove 308 through the threaded engagement, thereby pushing the end of the support rod 306 to move and changing the included angle between the support rod 303 and the support rod 306, thus realizing the smooth lifting and lowering of the stretcher body.

[0027] To drive the threaded rod 309 to rotate, the adjustment mechanism 3 also includes a handle 310 fixedly connected to the end of the threaded rod 309; to ensure that the two sides of the stretcher are raised and lowered synchronously, the adjustment mechanism 3 is provided with two sets of threaded rods 309 arranged symmetrically from left to right. The two sets of threaded rods 309 are connected by universal joint 311, limit telescopic rod 312 and universal joint 313. The length of the limit telescopic rod 312 can be extended or retracted to adapt to the change in distance between the threaded rods 309 on both sides during the folding process of the stretcher body.

[0028] Based on the above embodiments, the present invention also includes preferred technical solutions for folding locking and transmission: To reliably fix the main body of the stretcher (stretcher 1) and the second stretcher (stretcher 2), this embodiment provides a folding and fixing mechanism 4. This mechanism includes a pull plate 405, a spring 403, a slanted circular locking block 404, a second sliding groove 402, and a circular groove 406. The connecting plate 401 is provided with the second sliding groove 402. The slanted circular locking block 404 is slidably disposed in the second sliding groove 402. The pull plate 405 is fixedly connected to the slanted circular locking block 404. The spring 403 is disposed in the second sliding groove 402 and acts on one end of the slanted circular locking block 404 to drive it to move toward the locking position. When the main body of the stretcher is unfolded, the slanted circular locking block 404 is locked into the circular groove 406 on the stretcher 1.

[0029] In a preferred embodiment, the top of the support rod 303 is also rotatably connected to the bottom of the stretcher body via a connecting block, which ensures the stability and symmetry of the support points on both sides of the stretcher body.

[0030] As a preferred embodiment, the limiting telescopic rod 312 preferably adopts a sleeve structure or a telescopic rod structure inside, with universal joint one 311 and universal joint two 313 connected to its two ends respectively. This structure can ensure the effective transmission of torque between the threaded rods 309, and allows the distance between the threaded rods 309 on both sides to change when the stretcher body is folded.

[0031] In a preferred embodiment, the movable base 301 is provided with a slide groove 308, and the slider 307 is slidably connected in the slide groove 308. The slide groove 308 is used to provide precise guidance for the linear movement of the slider 307.

[0032] In a preferred embodiment, the connecting plate 401 of the folding and fixing mechanism 4 is provided with a second slide groove 402, and the oblique round locking block 404 is slidably disposed in the second slide groove 402. The second slide groove 402 is used to guide the unlocking and locking actions of the oblique round locking block 404. With the oblique surface design of the oblique round locking block 404, automatic locking can be achieved when the stretcher is unfolded.

[0033] Working principle: When the stretcher height needs to be adjusted, turn the handle 310 of the adjustment mechanism 3. The handle 310 drives the right threaded rod 309 to rotate. The right threaded rod 309 drives the limit telescopic rod 312 to rotate through the universal joint 311. The limit telescopic rod 312 can be extended when folded. The limit telescopic rod 312 drives the left threaded rod 309 to rotate through the universal joint 313. The thread on the threaded rod 309 causes the slider 307 to slide in the slide groove 308 on the moving seat 301. The slider 307 drives the support rod 306 to move. The top of the support rod 306 is caught in the connecting block 305 at the bottom of the stretcher 1 and the stretcher 2. At the same time, the support rod 306 causes the support rod 303 to rotate in the connecting block 302 on the moving seat 301 through the rotating shaft 304, thereby driving the stretcher to rise and fall. When stretcher 1 and stretcher 2 need to be folded, pull the pull plate 405 of the folding and fixing mechanism 4. The pull plate 405 drives the oblique round locking block 404 to slide in the slide groove 402 and compress the spring 403. At this time, the oblique round locking block 404 disengages from the round groove 406 on the right side of stretcher 1. Stretcher 1 and stretcher 2 rotate and fold at the connecting plate 401. When unfolded, rotate stretcher 1 and stretcher 2. The outer wall of stretcher 1 compresses the oblique round locking block 404 to compress the spring 403. When stretcher 1 and stretcher 2 are flat, the spring 403 rebounds the oblique round locking block 404 to lock into the round groove 406 of stretcher 1, thus completing the fixing of stretcher 1 and stretcher 2 to prevent the stretcher from being accidentally folded or moved.

Claims

1. A height-adjustable folding emergency stretcher, comprising: The stretcher body includes a stretcher one (1) and a stretcher two (2) pivotally connected by a connecting plate (401). Adjustment mechanism (3), the adjustment mechanism (3) is located below the stretcher body and is used to support the stretcher body. The adjustment mechanism (3) includes a movable seat (301), a support rod (303) rotatably connected to the movable seat (301) via a connecting block (302), and a support rod (306) rotatably connected to the bottom of the stretcher body via a connecting block (305). Its features are, The adjustment mechanism (3) further includes a slider (307) that is slidably disposed along the movable seat (301) and a threaded rod (309) that is threadedly engaged with the slider (307). The slider (307) is rotatably connected to the end of the second support rod (306), and the first support rod (303) and the second support rod (306) are rotatably connected through a rotating shaft (304); The main body of the stretcher also includes a folding and fixing mechanism (4), which is provided with a slanted circular locking block (404) that can move between a locked position and an unlocked position. When the locked position is reached, the slanted circular locking block (404) is engaged in the circular groove (406) of the first stretcher (1) to restrict the relative rotation between the first stretcher (1) and the second stretcher (2).

2. The height adjustable folding stretcher of claim 1, wherein, The top of the support rod (303) is also rotatably connected to the bottom of the stretcher body via a connecting block.

3. The height-adjustable folding emergency stretcher according to claim 1, characterized in that, The adjustment mechanism (3) also includes a throttle (310), which is fixedly connected to the end of the threaded rod (309) to drive it to rotate.

4. The height-adjustable folding emergency stretcher according to claim 1, characterized in that, The adjustment mechanism (3) is provided with two sets of threaded rods (309) arranged symmetrically on the left and right. The two sets of threaded rods (309) are connected by universal joint one (311), limit telescopic rod (312) and universal joint two (313).

5. The height-adjustable folding emergency stretcher according to claim 4, characterized in that, The length of the limiting telescopic rod (312) is extendable.

6. The height-adjustable folding emergency stretcher according to claim 1, characterized in that, The folding and fixing mechanism (4) further includes a pull plate (405) and a spring (403). The pull plate (405) is connected to the oblique circular locking block (404), and the spring (403) acts on the oblique circular locking block (404) to drive it to move toward the locking position.

7. The height-adjustable folding emergency stretcher according to claim 1, characterized in that, The movable seat (301) is provided with a sliding groove (308), and the slider (307) is slidably disposed in the sliding groove (308).

8. A height-adjustable folding emergency stretcher according to claim 1 or 6, characterized in that, The connecting plate (401) of the folding fixing mechanism (4) is provided with a second sliding groove (402), and the oblique round block (404) is slidably disposed in the second sliding groove (402).

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