Roller for stretcher

Abstract

The utility model relates to a roller for a stretcher, which belongs to the technical field of medical equipment and comprises two roller bodies arranged side by side and a switching mechanism. The switching mechanism comprises a switching assembly and two locking assemblies, the two locking assemblies are in one-to-one correspondence with the two wheel bodies, and the switching assembly is connected with the two locking assemblies; the locking assembly comprises a locking seat and a positioning block, a positioning pin is movably arranged on the locking seat in a penetrating mode, the positioning pin is connected with the locking seat through an elastic piece, the positioning block is fixedly arranged on the steering portion of the wheel body, a positioning groove is formed in the positioning block, the positioning groove is matched with the positioning pin, the positioning pin is connected with the switching assembly, and the switching assembly is connected with the locking seat. The switching assembly is used for driving the positioning pin to move in the direction close to the positioning block. The wheel bodies are switched between the first state and the second state, so that the stretcher can be conveniently steered in a narrow space, and the operation flexibility is improved.

Description

Technical Field

[0001] This utility model relates to a roller for a stretcher, belonging to the field of medical device technology. Background Technology

[0002] When someone is injured, they need to be transported to an ambulance on a stretcher for timely treatment. With the development of the medical field, the requirements for stretchers are also increasing. A stretcher must not only transport the injured person quickly and conveniently to the ambulance, but also ensure that the injured person is not subjected to excessive vibration during transport to avoid causing them greater pain.

[0003] Chinese utility model patent CN203122787U discloses an electric loading stretcher, mainly used for transporting injured patients to ambulances, belonging to the field of medical device technology. This electric loading stretcher features a support assembly that can rise and fall, controlled by an electric control box that extends and retracts hydraulic cylinders placed on the support assembly. This allows for easy raising and lowering of the stretcher for loading into the ambulance. When the electric control box loses power, a pressure relief button can be used to lower the support assembly. The wheel assembly at the front of the bed beam can retract inwards, shortening the stretcher's length and allowing it to be used in elevators without needing to be changed, reducing patient discomfort. The backrest, buttocks, and hipboard of the bed frame can all be folded, facilitating use for patients with injuries to different parts of their body. In the prior art, two sets of rollers are set up to facilitate the turning of the stretcher: one set of omnidirectional wheels and the other set of directional wheels. However, when turning in a confined space, the directional wheels will turn at the turning angle, causing the stretcher to be unable to turn smoothly in the confined space, affecting the flexibility of operation.

[0004] Therefore, there is a need for rollers for stretchers to facilitate their turning in confined spaces and improve operational flexibility. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, to provide a roller for a stretcher that facilitates the turning of the stretcher in a narrow space and improves the flexibility of operation.

[0006] The technical solution adopted by this utility model to solve the above problems is: a roller for a stretcher, including two wheel bodies arranged side by side, and a switching mechanism;

[0007] The switching mechanism includes a switching component and two locking components, with each locking component corresponding to one of the two wheels, and the switching component is connected to the two locking components.

[0008] The locking assembly comprises a locking seat and a positioning block, a positioning pin is movably arranged on the locking seat, the positioning pin is connected with the locking seat through an elastic element, the positioning block is fixedly arranged on a steering part of the wheel body, a positioning groove is arranged on the positioning block, the positioning groove is matched with the positioning pin, the positioning pin is connected with a switching assembly, and the switching assembly is used for driving the positioning pin to move towards the positioning block.

[0009] Preferably, the elastic element is a spring.

[0010] Preferably, an arc-shaped guide surface is arranged on the positioning block.

[0011] Preferably, one end of the positioning pin close to the positioning block is hemispherical.

[0012] Preferably, the switching assembly comprises a connecting plate and a push tube, a pedal is rotatably connected on the connecting plate, the pedal is connected with the connecting plate through a torsion spring, two ends of the push tube are fixedly connected with the two positioning pins respectively, a sliding block is fixedly arranged on the push tube, a locking groove is arranged on the sliding block, a limiting wheel is connected on the pedal, and the limiting wheel abuts against the sliding block.

[0013] Preferably, a guide groove is arranged on the sliding block, a limiting column is slidably connected in the guide groove, and the limiting column is fixedly connected with the connecting plate.

[0014] Compared with the prior art, the rolling wheel for the stretcher has the following advantages:

[0015] The rolling wheel for the stretcher is switched between the first state and the second state, so that the stretcher is convenient to steer in a narrow space, and the operation flexibility is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the rolling wheel for the stretcher in the second state of the utility model;

[0017] Figure 2 It is a front view of the rolling wheel for the stretcher in the first state of the utility model;

[0018] Figure 3 It is Figure 2 A-A direction sectional view of the utility model;

[0019] Figure 4 It is Figure 2 B-B direction sectional view of the utility model;

[0020] Figure 5 It is Figure 4 C part enlarged view of the utility model.

[0021] Among them:

[0022] Wheel body 1, switching mechanism 2, stretcher 3;

[0023] Switching assembly 21, locking assembly 22;

[0024] Connecting plate 211, push tube 212, pedal 213, torsional spring 214, sliding block 215, guide groove 216, limiting column 217, locking groove 218, limiting wheel 219;

[0025] Locking seat 221, positioning block 222, positioning pin 223, spring 224, positioning groove 225. DETAILED DESCRIPTION

[0026] As Figures 1-5 shown, a roller for a stretcher in the embodiment includes two wheel bodies 1, the two wheel bodies 1 are arranged side by side, and further includes a switching mechanism 2;

[0027] The switching mechanism 2 includes a switching assembly 21 and two locking assemblies 22, the two locking assemblies 22 correspond to the two wheel bodies 1 one by one, and the switching assembly 21 is connected with the two locking assemblies 22;

[0028] The locking assembly 22 includes a locking seat 221 and a positioning block 222, the locking seat 221 movably penetrates a positioning pin 223, the positioning pin 223 is connected with the locking seat 221 through an elastic element, the elastic element is a spring 224, the positioning block 222 is fixedly arranged on a turning portion of the wheel body 1, the positioning block 222 is provided with a positioning groove 225, the positioning groove 225 is matched with the positioning pin 223, the positioning pin 223 is connected with the switching assembly 21, and the switching assembly 21 is used for driving the positioning pin 223 to move towards the direction close to the positioning block 222;

[0029] The roller for the stretcher has two states;

[0030] The first state is a directional state, at this time, the positioning pin 223 is inserted into the positioning groove 225, and the locking of the turning portion on the wheel body 1 is realized through the cooperation between the positioning pin 223 and the positioning groove 225, that is, the wheel body 1 cannot turn;

[0031] The second state is a universal state, the positioning pin 223 is separated from the positioning groove 225, that is, the unlocking of the turning portion on the wheel body 1 is realized, and the wheel body 1 can normally turn;

[0032] The initial state is the first state;

[0033] When the first state is switched to the second state, the switching assembly 21 exerts a pulling force on the positioning pin 223, so that the positioning pin 223 moves away from the positioning block 222, the positioning pin 223 is separated from the positioning groove 225, and at the same time, the spring 224 is deformed;

[0034] When the second state switches to the first state, the switching assembly 21 stops applying pulling force to the positioning pin 223, at this time, the positioning pin 223 reversely moves by the elastic action of the spring 224, and the end of the positioning pin 223 abuts against the positioning block 222, when the steering part of the wheel body 1 deflects and makes the positioning slot 225 directly opposite to the positioning pin 223, the positioning pin 223 is inserted into the positioning slot 225 by the elastic force of the spring 224;

[0035] The positioning block 222 is provided with an arc-shaped guide surface, which facilitates the relative rotation of the positioning pin 223 on the positioning block 222, and ensures that the positioning pin 223 is smoothly inserted into the positioning slot 225;

[0036] The end of the positioning pin 223 close to the positioning block 222 is hemispherical;

[0037] The switching assembly 21 comprises a connecting plate 211 and a push tube 212, the connecting plate 211 is rotatably connected with a pedal 213, the pedal 213 is connected with the connecting plate 211 through a torsion spring 214, the two ends of the push tube 212 are fixedly connected with two positioning pins 223 respectively, a sliding block 215 is fixedly arranged on the push tube 212, a guide groove 216 is arranged on the sliding block 215, a limiting column 217 is slidably connected in the guide groove 216, the limiting column 217 is fixedly connected with the connecting plate 211, a locking groove 218 is arranged on the sliding block 215, a limiting wheel 219 is connected on the pedal 213, and the limiting wheel 219 abuts against the sliding block 215;

[0038] When the first state switches to the second state, the pedal 213 is stepped on, the relative rotation between the pedal 213 and the connecting plate 211 is generated, the torsion spring 214 is deformed, the rotation of the pedal 213 drives the limiting wheel 219 to synchronously rotate, the rotation of the limiting wheel 219 drives the sliding block 215 to move the push tube 212, the movement of the push tube 212 drives the positioning pin 223 to move away from the positioning block 222, the spring 224 is deformed, and the positioning pin 223 is separated from the positioning slot 225, during the movement of the sliding block 215, the relative movement between the positioning column and the guide groove 216 is generated, the movement guiding effect of the sliding block 215 is realized through the cooperation between the positioning column and the guide groove 216, when the rotation of the pedal 213 is stopped, the limiting wheel 219 is clamped into the locking groove 218, the self-locking of the pedal 213 is realized through the cooperation between the limiting wheel 219 and the locking groove 218;

[0039] When the second state switches to the first state, the pedal 213 is lifted upward, the limiting wheel 219 is separated from the locking groove, then the pedal 213 is reversely rotated and reset by the elastic force of the torsion spring 214, at this time, the positioning pin 223 is reversely moved and reset by the elastic force of the spring 224, and the positioning pin 223 is separated from the positioning groove 225, and the reset of the positioning pin 223 drives the push tube 212 and the sliding block 215 to reset in turn;

[0040] During installation, the wheel body 1 is installed on the stretcher 3, and the connecting plate 211 and the locking seat 221 are fixedly arranged on the stretcher 3, and a set of universal wheels are arranged on the stretcher 3, when the stretcher 3 needs to be turned in a narrow space, the wheels for the stretcher are switched to the universal state, when the stretcher 3 needs to be normally moved, the wheels for the stretcher are switched to the directional state, if the wheels for the stretcher are switched to the universal state when the stretcher 3 is normally moved, the stretcher 3 is easy to deviate when moving, and the use of the set of universal wheels and the wheels in the directional state can ensure that the stretcher 3 does not deviate during movement;

[0041] In summary, through the switching of the wheel body 1 between the first state and the second state, the stretcher 3 is facilitated to turn in a narrow space, and the operation flexibility is improved.

[0042] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the utility model claims.

Claims

1. A roller for a stretcher, comprising two wheel bodies (1) arranged side by side, characterized in that: The switching mechanism (2) is further included; The switching mechanism (2) comprises a switching assembly (21) and two locking assemblies (22), the two locking assemblies (22) correspond to the two wheel bodies (1) one by one, and the switching assembly (21) is connected with the two locking assemblies (22). The locking assembly (22) comprises a locking seat (221) and a positioning block (222), a positioning pin (223) is movably arranged on the locking seat (221), the positioning pin (223) is connected with the locking seat (221) through an elastic element, the positioning block (222) is fixedly arranged on a steering portion of the wheel body (1), the positioning block (222) is provided with a positioning groove (225), the positioning groove (225) is matched with the positioning pin (223), the positioning pin (223) is connected with the switching assembly (21), and the switching assembly (21) is used for driving the positioning pin (223) to move towards the positioning block (222).

2. A roller for a stretcher according to claim 1, wherein: The elastic element is a spring (224).

3. A roller for a stretcher according to claim 1, wherein: The positioning block (222) is provided with an arc-shaped guide surface.

4. A roller for a stretcher according to claim 1, wherein: One end of the positioning pin (223) close to the positioning block (222) is hemispherical.

5. A roller for a stretcher according to claim 1, wherein: The switching assembly (21) comprises a connecting plate (211) and a push tube (212), the connecting plate (211) is rotatably connected with a pedal (213), the pedal (213) is connected with the connecting plate (211) through a torsion spring (214), the two ends of the push tube (212) are fixedly connected with the two positioning pins (223) respectively, the push tube (212) is fixedly provided with a sliding block (215), the sliding block (215) is provided with a locking groove (218), the pedal (213) is connected with a limiting wheel (219), and the limiting wheel (219) abuts against the sliding block (215).

6. A roller for a stretcher according to claim 5, wherein: The sliding block (215) is provided with a guide groove (216), the guide groove (216) is slidably connected with a limiting column (217), and the limiting column (217) is fixedly connected with the connecting plate (211).

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