A fracture prevention compression device for emergency resuscitation

Abstract

This invention relates to the field of emergency internal medicine technology, specifically to an emergency resuscitation and fracture prevention compression device, including a support frame and a compression mechanism mounted on the support frame. The compression mechanism includes a housing, a telescopic actuator, a telescopic rod, a transmission device, and a compression cover. This invention uses a transmission device to stably connect the output shaft of the telescopic actuator and the telescopic rod, allowing the telescopic rod to press the compression cover against the patient's chest at different heights. The telescopic actuator stably drives the telescopic rod and compression cover to resuscitate the patient. Simultaneously, the transmission device prevents the telescopic actuator from directly transmitting rigid force to the telescopic rod, thus providing cushioning and solving the problem that existing compression devices may fracture the patient's ribs.

Description

Technical Field

[0001] This invention relates to the field of emergency internal medicine technology, specifically to an emergency resuscitation device for preventing fractures. Background Technology

[0002] Emergency refers to the actions taken to rapidly examine and diagnose patients; first aid is the emergency medical service provided to prevent death and subsequent disability of patients in critical conditions. Both are core components of emergency medicine. The emergency medical service system is responsible for implementing effective on-site first aid, proper triage, organized patient transfer, and close ties with base medical institutions. Emergency medicine can be divided into two main categories: traumatic and non-traumatic. However, in actual use, existing chest compression devices require rapid compression of the patient's chest cavity to maintain breathing. Most existing compression devices use mechanical rotation for compression, but due to excessive impact pressure, this can lead to rib fractures in severe cases, posing a certain safety hazard.

[0003] Chinese patent CN113171285B discloses a chest compression device for emergency internal medicine resuscitation, including a base plate, a support rod fixedly installed on the top of the base plate, a housing fixedly inserted into the top of the support rod, a soft pillow fixedly installed on the top of the base plate, and an electric telescopic rod fixedly installed on the top of the housing. A flange is fixedly fitted onto the output end of the electric telescopic rod, and a transmission rod is fixedly installed on the side of the flange away from the electric telescopic rod. This chest compression device for emergency internal medicine resuscitation generates a turbulent drag reduction effect through fluid movement between a first decompression chamber and a second decompression chamber, adding a multi-functional buffer structure. However, in the supine position, each patient's chest height is different, requiring adjustment of the compression block height according to the actual height. In this compression device, the compression block height cannot be adjusted, thus making stable compressions impossible. Summary of the Invention

[0004] To address the aforementioned issues, an emergency resuscitation and fracture prevention compression device is provided. A transmission mechanism stably connects the output shaft of the telescopic actuator to the telescopic rod, allowing the telescopic rod to press the compression shield against the patient's chest at different heights. The telescopic actuator stably drives the telescopic rod and compression shield to resuscitate the patient. Simultaneously, the transmission mechanism prevents the telescopic actuator from directly transmitting rigid force to the telescopic rod, thus providing cushioning and resolving the issue of existing compression devices potentially breaking the patient's ribs.

[0005] To address the problems of existing technologies, this invention provides an emergency fracture prevention compression device, including a support frame and a compression mechanism mounted on the support frame. The compression mechanism includes a housing, a telescopic actuator, a telescopic rod, a transmission mechanism, and a compression cover. The housing is located at the top of the support frame. The telescopic actuator, telescopic rod, and transmission mechanism are all housed within the housing. The telescopic rod passes through the housing and slides within it. The transmission mechanism includes an input section connected to the output shaft of the telescopic actuator and an output section connected to the telescopic rod. The distance between the output section and the output section is adjustable. The compression cover is located at the bottom of the telescopic rod to increase the contact area between the telescopic rod and the patient's chest.

[0006] Preferably, the transmission includes a sealing cylinder, an inner cylinder, a first piston, and a second piston. The sealing cylinder and the telescopic rod are coaxially disposed in the housing. The inner cylinder is coaxially disposed in the sealing cylinder. The top end of the inner cylinder is connected to the top end of the inner cavity of the sealing cylinder, and the bottom end of the inner cylinder is higher than the bottom end of the inner cavity of the sealing cylinder. The inner cylinder divides the inner cavity of the sealing cylinder into a plug cavity and an annular cavity with interconnected bottoms. The first piston and the second piston are coaxially and slidably disposed in the plug cavity. The output shaft of the telescopic actuator passes through the sealing cylinder and is connected to the first piston. The top end of the telescopic rod passes through the sealing cylinder and is connected to the second piston. Hydraulic oil is injected into both the top and bottom of the second piston. The second piston is provided with an openable and closable gate hole.

[0007] Preferably, the second piston has a first mounting cavity with an opening at the bottom, and the top end of the telescopic rod has a second mounting cavity. The transmission device further includes a sealing assembly, which includes a first plug, a first sliding block, a connecting rod, a first electromagnet, and a first spring. The first plug is slidably disposed in the first mounting cavity along the radial direction of the gate hole, and the first plug can block the gate hole radially. The first sliding block is slidably disposed in the second mounting cavity on the same axis. The two ends of the connecting rod are rotatably connected to the inner end of the first plug and the top end of the first sliding block, respectively. The first electromagnet is disposed in the second mounting cavity. The first spring is disposed between the first sliding block and the first electromagnet. Under the action of the first spring, the first sliding block guides the connecting rod to make the first plug block block the gate hole.

[0008] Preferably, the second piston has a first mounting cavity with an opening at the bottom, and the top end of the telescopic rod has a second mounting cavity. The transmission device further includes a sealing assembly, which includes a second plug, a second sliding block, an adjusting rod, a second electromagnet, and a second spring. The second plug is slidably disposed in the first mounting cavity along the radial direction of the gate hole, and the second plug can block the gate hole radially. The second sliding block is slidably disposed in the second mounting cavity coaxially. The adjusting rod is disposed at the top end of the second sliding block, and extends obliquely upward from the top end of the second sliding block and is close to the axis of the telescopic rod. The adjusting rod passes through the second plug and slides with it. The second electromagnet is disposed in the second mounting cavity, and the second spring is disposed between the second sliding block and the second electromagnet. Under the action of the second spring, the second sliding block causes the second plug to block the gate hole through the adjusting rod.

[0009] Preferably, a stepped groove is provided at the bottom end of the inner circumferential surface of the first mounting cavity, the stepped groove extends downward to form an internal threaded cylinder, and the telescopic rod is threadedly connected to the internal threaded cylinder and abuts in the stepped groove.

[0010] Preferably, the bottom end of the outer circumferential surface of the inner cylinder is provided with a closed ring coaxial with it. The closed ring divides the ring cavity into an upper cavity and a lower cavity. The transmission device also includes a piston ring and an elastic connector. The piston ring is coaxially and slidably disposed in the lower cavity. The elastic connector is disposed between the piston ring and the closed ring. The hydraulic oil at the bottom of the piston ring overcomes the elastic force of the elastic connector and approaches the closed ring.

[0011] Preferably, the elastic connector includes a limiting ring, a connecting rod, and a third spring. The limiting ring is coaxially and slidably disposed in the upper cavity. The connecting rod passes through the closing ring and slides with it. The bottom end of the connecting rod is fixedly connected to the piston ring, and the top end of the connecting rod is fixedly connected to the limiting ring. The third spring is sleeved on the connecting rod, and the two ends of the third spring abut against the top end of the piston ring and the bottom end of the closing ring, respectively.

[0012] Preferably, the outer diameter of the limiting ring is smaller than the inner diameter of the sealing cylinder, the inner diameter of the limiting ring is larger than the outer diameter of the inner cylinder, the top of the limiting ring is filled with magnetorheological fluid, and an electromagnetic coil coaxial with the outer circumference of the sealing cylinder is provided.

[0013] Preferably, a pressure sensor capable of detecting the hydraulic oil pressure inside the sealed cylinder is provided at the lower part of the sealed cylinder.

[0014] Preferably, the sealing cylinder includes a cylinder body and a sealing cap. The cylinder body is disposed in the housing. The bottom end of the cylinder body is closed and the top end is open. The sealing cap is coaxially disposed at the top end of the cylinder body. The inner cylinder is coaxially disposed at the bottom end of the sealing cap. The sealing cylinder is provided with an oil injection hole that can communicate with the outside. An oil injection plug is provided on the outside of the oil injection hole.

[0015] The advantages of this invention compared to the prior art are:

[0016] This invention uses a transmission mechanism to stably connect the output shaft of the telescopic actuator and the telescopic rod, allowing the telescopic rod to press the compression shield against the patient's chest at different heights. The telescopic actuator can stably drive the telescopic rod and compression shield to perform resuscitation on the patient. At the same time, the transmission mechanism can prevent the telescopic actuator from directly transmitting rigid force to the telescopic rod, thus providing a buffer and solving the problem that existing compression devices may break the patient's ribs. Attached Figure Description

[0017] Figure 1 This is a 3D diagram of a fracture prevention compression device used in emergency rescue.

[0018] Figure 2 This is a partial three-dimensional exploded view of a fracture prevention compression device used in emergency rescue.

[0019] Figure 3 This is an axial three-dimensional sectional view of the telescopic actuator, telescopic rod, and transmission device in an emergency fracture prevention compression device.

[0020] Figure 4 This is an axial sectional view of the telescopic actuator, telescopic rod, and transmission device in an emergency fracture prevention compression device.

[0021] Figure 5 yes Figure 4 A magnified view of part A.

[0022] Figure 6 yes Figure 4 A magnified view of section B.

[0023] Figure 7 This is a partial three-dimensional exploded view of the transmission mechanism in an emergency fracture prevention compression device.

[0024] Figure 8 This is a three-dimensional diagram of an elastic connector in an emergency fracture prevention compression device.

[0025] Figure 9 This is a three-dimensional exploded view of the second piston and telescopic rod in an emergency compression device for preventing fractures.

[0026] Figure 10This is a schematic diagram of a first embodiment of a sealing assembly in an emergency fracture prevention compression device.

[0027] Figure 11 This is a schematic diagram of a second embodiment of a sealing assembly in an emergency fracture prevention compression device.

[0028] The labels in the diagram are as follows: 11-Back plate; 12-Support plate; 21-Housing; 22-Telescopic actuator; 23-Telescopic rod; 24-Transmission device; 241-Sealing cylinder; 2411-Cylinder body; 2412-Sealing cover; 242-Inner cylinder; 2421-Sealing ring; 243-First piston; 244-Second piston; 2441-Gate; 2442-Internal threaded cylinder; 2451-First plug; 2452-First slide block Moving block; 2453-Connecting rod; 2454-First electromagnet; 2455-First spring; 2461-Second stopper; 2462-Second sliding block; 2463-Adjusting rod; 2464-Second electromagnet; 2465-Second spring; 247-Piston ring; 2481-Limiting ring; 2482-Connecting rod; 2483-Third spring; 25-Press cover; 26-Electromagnetic coil; 27-Pressure sensor. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides:

[0031] An emergency rescue fracture prevention compression device includes a support frame and a compression mechanism mounted on the support frame. The compression mechanism includes a housing 21, a telescopic actuator 22, a telescopic rod 23, a transmission mechanism 24, and a compression cover 25. The housing 21 is located at the top of the support frame. The telescopic actuator 22, the telescopic rod 23, and the transmission mechanism 24 are all located within the housing 21. The telescopic rod 23 passes through the housing 21 and slides within it. The transmission mechanism 24 includes an input section connected to the output shaft of the telescopic actuator 22 and an output section that is drively connected to the telescopic rod 23. The distance between the output sections is adjustable. The compression cover 25 is located at the bottom end of the telescopic rod 23 to increase the contact area between the telescopic rod 23 and the patient's chest.

[0032] The support includes a back plate 11 and a support plate 12 that can be fastened to both sides of the back plate 11. The compression mechanism is located on the top of the support plate 12. When in use, the patient lies flat, the back plate 11 is inserted into the back of the patient, and then the support plate 12 is fastened to both sides of the back plate 11, so that the compression mechanism can be suspended above the patient's chest.

[0033] Activate the actuator 24, placing the compression shield 25 against the patient's chest. Simultaneously, the telescopic rod 23 slides relative to the housing 21, adjusting and locking the distance between the output and input parts of the actuator 24. Then, activate the telescopic actuator 22, allowing its output shaft to reciprocate vertically. This causes the output shaft of the actuator 22 to move the input part of the actuator 24, enabling the output part of the actuator 24 to slide the telescopic rod 23 relative to the housing 21. The telescopic rod 23 then presses against the patient's chest through the compression shield 25. The compression shield 25 increases the contact area between the telescopic rod 23 and the patient, resulting in more even force distribution on the patient's chest and preventing rib fractures. Simultaneously, the actuator 24 buffers the output force of the telescopic actuator 22's output shaft, ensuring the telescopic rod 23 can stably press against the patient's chest and prevent rib fractures.

[0034] The telescopic actuator 22 includes, but is not limited to, an electric push rod.

[0035] In this embodiment, the transmission device 24 can stably connect the output shaft of the telescopic actuator 22 and the telescopic rod 23, so that the telescopic rod 23 can press the compression cover 25 against the patient's chest at different heights. The telescopic actuator 22 can stably drive the telescopic rod 23 and the compression cover 25 to rescue the patient. At the same time, the transmission device 24 can prevent the telescopic actuator 22 from directly transmitting rigid force to the telescopic rod 23, thereby buffering the impact and solving the problem that existing compression devices may break the patient's ribs.

[0036] like Figure 4 and Figure 5 As shown, the transmission device 24 includes a sealing cylinder 241, an inner cylinder 242, a first piston 243, and a second piston 244. The sealing cylinder 241 and the telescopic rod 23 are coaxially disposed in the housing 21. The inner cylinder 242 is coaxially disposed in the sealing cylinder 241. The top end of the inner cylinder 242 is connected to the top end of the inner cavity of the sealing cylinder 241, and the bottom end of the inner cylinder 242 is higher than the bottom end of the inner cavity of the sealing cylinder 241. The inner cylinder 242 divides the inner cavity of the sealing cylinder 241 into a plug cavity and an annular cavity with the bottom connected. The first piston 243 and the second piston 244 are coaxially and slidably disposed in the plug cavity. The output shaft of the telescopic actuator 22 passes through the sealing cylinder 241 and is connected to the first piston 243. The top end of the telescopic rod 23 passes through the sealing cylinder 241 and is connected to the second piston 244. The top and bottom of the second piston 244 are filled with hydraulic oil, and the second piston 244 is provided with an openable and closable gate hole 2441.

[0037] When the height of the compression cover 25 needs to be adjusted, the gate on the second piston 244 is opened, allowing the hydraulic oil at the top and bottom of the second piston 244 to communicate, thus enabling the second piston 244 to slide within the inner cylinder 242. After the compression cover 25 is pressed against the patient's chest, the gate hole 2441 of the second piston 244 is blocked, preventing the hydraulic oil at the top and bottom of the second piston 244 from communicating. After the telescopic actuator 22 is activated, the output shaft of the actuator can drive the first piston 243 to reciprocate vertically within the inner cylinder 242. Under the action of the hydraulic oil between the first piston 243 and the second piston 244, the second piston 244 can reciprocate stably within the inner cylinder 242. At the same time, the hydraulic oil can buffer the rigid force of the first piston 243, preventing the rigid force of the telescopic actuator 22 from being directly transmitted to the patient, thereby preventing the patient's ribs from breaking.

[0038] The hydraulic oil at the bottom of the second piston 244 can be squeezed into the ring cavity. When the first piston 243 rises, the hydraulic oil in the ring cavity will be drawn into the inner cylinder 242, making the lifting and lowering process of the first piston 243 and the second piston 244 more stable.

[0039] like Figure 5 , Figure 9 and Figure 10 As shown, the second piston 244 has a first mounting cavity with an opening at the bottom, and the top of the telescopic rod 23 has a second mounting cavity. The transmission device 24 also includes a sealing assembly, which includes a first plug 2451, a first sliding block 2452, a connecting rod 2453, a first electromagnet 2454, and a first spring 2455. The first plug 2451 is slidably disposed in the first mounting cavity along the radial direction of the gate hole 2441. The first plug 2451 can radially block the gate hole 2441. The sliding block 2452 is slidably disposed coaxially in the second mounting cavity. The two ends of the connecting rod 2453 are rotatably connected to the inner end of the first plug 2451 and the top end of the first sliding block 2452, respectively. The first electromagnet 2454 is disposed in the second mounting cavity. The first spring 2455 is disposed between the first sliding block 2452 and the first electromagnet 2454. Under the action of the first spring 2455, the first sliding block 2452 guides the connecting rod 2453 to block the first plug 2451 and seal the gate hole 2441.

[0040] As a first embodiment of the sealing assembly, in the initial state, the first sliding block 2452 moves away from the first electromagnet 2454 under the action of the first spring 2455, and the connecting rod 2453 drives the first plug block 2451 to seal the gate hole 2441 radially, so that the hydraulic oil at the top and bottom of the second piston 244 cannot be connected, so that when the first piston 243 is not sliding, the second piston 244 cannot move in the inner cylinder 242.

[0041] After the telescopic drive mechanism is activated, the first piston 243 slides in the inner cylinder 242, allowing the second piston 244 to slide in the inner cylinder 242, thereby enabling the telescopic rod 23 to press on the patient.

[0042] When the height of the pressing cover 25 needs to be adjusted, the first electromagnet 2454 is activated, so that the first sliding block 2452 can be pushed by the magnetic force to overcome the elastic force of the first spring 2455 and slide in the second mounting cavity. The connecting rod 2453 drives the first plug 2451 to exit from the gate hole 2441, so that the two ends of the gate hole 2441 can be connected, and the second piston 244 can move relative to the first piston 243 in the inner cylinder 242.

[0043] like Figure 11 As shown, the second piston 244 has a first mounting cavity with an opening at the bottom, and the top of the telescopic rod 23 has a second mounting cavity. The transmission device 24 also includes a sealing assembly, which includes a second plug 2461, a second sliding block 2462, an adjusting rod 2463, a second electromagnet 2464, and a second spring 2465. The second plug 2461 is slidably disposed in the first mounting cavity along the radial direction of the gate hole 2441, and the second plug 2461 can block the gate hole 2441 radially. The second sliding block 2462 is coaxially slidably disposed in the second mounting cavity. An adjusting rod 2463 is disposed at the top of the second sliding block 2462. The adjusting rod 2463 extends obliquely upward from the top of the second sliding block 2462 and is close to the axis of the telescopic rod 23. The adjusting rod 2463 passes through the second plug 2461 and slides with it. The second electromagnet 2464 is disposed in the second mounting cavity. The second spring 2465 is disposed between the second sliding block 2462 and the second electromagnet 2464. Under the action of the second spring 2465, the second sliding block 2462 causes the second plug 2461 to block the gate hole 2441 through the adjusting rod 2463.

[0044] As a first embodiment of the sealing assembly, in the initial state, the second sliding block 2462 moves away from the second electromagnet 2464 under the action of the second spring 2465, and the adjusting rod 2463 drives the second plug block 2461 to block the gate hole 2441 radially, so that the hydraulic oil at the top and bottom of the second piston 244 cannot be connected, so that when the first piston 243 is not sliding, the second piston 244 cannot move in the inner cylinder 242.

[0045] After the telescopic drive mechanism is activated, the second piston 244 slides in the inner cylinder 242, which allows the telescopic rod 23 to press on the patient.

[0046] When the height of the pressing cover 25 needs to be adjusted, the second electromagnet 2464 is activated, so that the second sliding block 2462 can be overcome by the elastic force of the second spring 2465 and slide in the second mounting cavity under the action of magnetic force. Because the adjusting rod 2463 is tilted, the second plug 2461 exits from the gate hole 2441, so that the two ends of the gate hole 2441 can be connected, so that the second piston 244 can move relative to the first piston 243 in the inner cylinder 242.

[0047] like Figure 5 As shown, a stepped groove is provided at the bottom end of the inner circumferential surface of the first mounting cavity. The stepped groove extends downward to form an internal threaded cylinder 2442. The telescopic rod 23 is threadedly connected to the internal threaded cylinder 2442 and abuts against the stepped groove.

[0048] In order to enable the second piston 244 to be stably connected to the telescopic rod 23, a stepped groove is provided in the first mounting cavity, and the bottom end of the stepped groove extends downward to form an internal threaded cylinder 2442, so that the internal threaded cylinder 2442 is threadedly connected to the telescopic rod 23, thereby enabling a stable connection between the telescopic rod 23 and the second piston 244.

[0049] like Figure 6 As shown, a closed ring 2421 coaxially with the bottom end of the outer circumference of the inner cylinder 242 is provided. The closed ring 2421 divides the ring cavity into an upper cavity and a lower cavity. The transmission device 24 also includes a piston ring 247 and an elastic connector. The piston ring 247 is coaxially and slidably disposed in the lower cavity. The elastic connector is disposed between the piston ring 247 and the closed ring 2421. The hydraulic oil at the bottom of the piston ring 247 overcomes the elastic force of the elastic connector and approaches the closed ring 2421.

[0050] By coaxially setting the closing ring 2421 in the ring cavity and elastically setting the piston ring 247 at the bottom of the piston ring 247 through the elastic connector, the piston ring 247 abuts against the hydraulic oil in the lower cavity. When the height of the hydraulic oil in the ring cavity rises or falls, it needs to overcome the elastic force of the elastic connector. The piston ring 247 can stabilize the height of the hydraulic oil. At the same time, after the first piston 243 is reset, the piston ring 247 can squeeze the hydraulic oil in the lower cavity into the inner cylinder 242 to make the second piston 244 quickly reset.

[0051] like Figure 5 and Figure 6As shown, the elastic connector includes a limiting ring 2481, a connecting rod 2482, and a third spring 2483. The limiting ring 2481 is coaxially and slidably disposed in the upper cavity. The connecting rod 2482 passes through the closing ring 2421 and slides with it. The bottom end of the connecting rod 2482 is fixedly connected to the piston ring 247, and the top end of the connecting rod 2482 is fixedly connected to the limiting ring 2481. The third spring 2483 is sleeved on the connecting rod 2482, and the two ends of the third spring 2483 abut against the top end of the piston ring 247 and the bottom end of the closing ring 2421, respectively.

[0052] After the connecting rod 2482 passes through the closing ring 2421, it slides into the closing ring 2421. The limiting ring 2481 is set in the upper cavity and fixedly connected to the connecting rod 2482 to prevent the connecting rod 2482 from detaching from the closing ring 2421. At the same time, the piston ring 247 is fixedly connected to the bottom end of the connecting rod 2482. The hydraulic oil needs to overcome the elastic force of the third spring 2483 to drive the piston ring 247 to move in the lower cavity. At the same time, after the first piston 243 is reset, the piston ring 247 can squeeze the hydraulic oil into the inner cylinder 242 under the action of the third spring 2483.

[0053] like Figure 4 As shown, the outer diameter of the limiting ring 2481 is smaller than the inner diameter of the sealing cylinder 241, the inner diameter of the limiting ring 2481 is larger than the outer diameter of the inner cylinder 242, the top of the limiting ring 2481 is filled with magnetorheological fluid, and an electromagnetic coil 26 coaxial with it is provided on the outer circumferential surface of the sealing cylinder 241.

[0054] The viscosity of the magnetorheological fluid is controlled by the electromagnetic coil 26, so that the limiting ring 2481 can slide only after overcoming the viscosity of the magnetorheological fluid. This further buffers the output force of the telescopic actuator 22, thereby preventing the patient's ribs from breaking.

[0055] Magnetorheological fluid can also be replaced with electrorheological fluid, and the viscosity of the electrorheological fluid can be controlled by controlling the pressure of the applied current.

[0056] like Figure 4 As shown, a pressure sensor 27 capable of detecting the hydraulic oil pressure inside the sealing cylinder 241 is provided at the lower part of the sealing cylinder 241.

[0057] The pressure sensor 27 can monitor the pressure of the hydraulic oil at the bottom of the second piston 244 in real time. When the pressure of the hydraulic oil at the bottom of the second piston 244 is too high, it means that the force exerted by the telescopic rod 23 on the patient's chest is too great. Therefore, it is necessary to guide the output rod of the telescopic actuator 22 to reset in time, so as to avoid excessive force causing the patient's ribs to break.

[0058] like Figure 4 , Figure 7 and Figure 8As shown, the sealing cylinder 241 includes a cylinder body 2411 and a sealing cover 2412. The cylinder body 2411 is disposed in the housing 21. The bottom end of the cylinder body 2411 is closed and the top end is open. The sealing cover 2412 is coaxially disposed at the top end of the cylinder body 2411. The inner cylinder 242 is coaxially disposed at the bottom end of the sealing cover 2412. The sealing cylinder 241 is provided with an oil injection hole that can communicate with the outside. An oil injection plug is provided on the outside of the oil injection hole.

[0059] The cylinder 2411 and the sealing cap 2412 form a structure for housing the inner cylinder 242, and magnetorheological fluid can be injected into the upper cavity through the oil injection plug.

[0060] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A fracture-preventing pressing device for emergency rescue, comprising a support and a pressing mechanism arranged on the support, characterized in that, The pressing mechanism comprises a casing (21), a telescopic driver (22), a telescopic rod (23), a transmission (24) and a pressing cover (25), the casing (21) is arranged at the top end of the support, the telescopic driver (22), the telescopic rod (23) and the transmission (24) are arranged in the casing (21), the telescopic rod (23) penetrates through the casing (21) and is in sliding fit with the casing (21), the transmission (24) comprises an input part connected with the output shaft of the telescopic driver (22) and an output part in transmission connection with the telescopic rod (23), the interval between the output part and the output part is adjustable, and the pressing cover (25) is arranged at the bottom end of the telescopic rod (23) and is used for increasing the contact area between the telescopic rod (23) and the chest of the patient. The transmission (24) comprises a sealing cylinder (241), an inner cylinder (242), a first piston (243) and a second piston (244), the sealing cylinder (241) is coaxially arranged in the casing (21) and coaxially arranged in the sealing cylinder (241), the top end of the inner cylinder (242) is connected with the inner cavity top end of the sealing cylinder (241), the bottom end of the inner cylinder (242) is higher than the inner cavity bottom end of the sealing cylinder (241), the inner cylinder (242) divides the inner cavity of the sealing cylinder (241) into a plug cavity and a ring cavity in communication at the bottom, the first piston (243) and the second piston (244) are coaxially and slidingly arranged in the plug cavity, the output shaft of the telescopic driver (22) penetrates through the sealing cylinder (241) and is connected with the first piston (243), the top end of the telescopic rod (23) penetrates through the sealing cylinder (241) and is connected with the second piston (244), the top part and the bottom part of the second piston (244) are filled with hydraulic oil, and the second piston (244) is provided with an openable and closable gate hole (2441).

2. The anti-fracture pressing device for emergency rescue according to claim 1, characterized in that, The second piston (244) is provided with a first installation cavity with an open bottom end, and the top end of the telescopic rod (23) is provided with a second installation cavity. The transmission device (24) further comprises a hole sealing assembly, which comprises a first plug (2451), a first sliding block (2452), a connecting rod (2453), a first electromagnet (2454) and a first spring (2455). The first plug (2451) is arranged in the first installation cavity and slides along the radial direction of the gate hole (2441). The first plug (2451) can block the gate hole (2441) in the radial direction. The first sliding block (2452) is coaxially arranged in the second installation cavity and slides along the axial direction. The two ends of the connecting rod (2453) are respectively connected with the inner end of the first plug (2451) and the top end of the first sliding block (2452). The first electromagnet (2454) is arranged in the second installation cavity. The first spring (2455) is arranged between the first sliding block (2452) and the first electromagnet (2454). The first sliding block (2452) drives the connecting rod (2453) to block the gate hole (2441) by the action of the first spring (2455).

3. The anti-fracture pressing device for emergency rescue according to claim 1, characterized in that, The second piston (244) is provided with a first installation cavity with an open bottom end, and the top end of the telescopic rod (23) is provided with a second installation cavity. The transmission device (24) further comprises a hole sealing assembly, which comprises a second plug (2461), a second sliding block (2462), an adjusting rod (2463), a second electromagnet (2464) and a second spring (2465). The second plug (2461) is arranged in the first installation cavity and slides along the radial direction of the gate hole (2441). The second plug (2461) can block the gate hole (2441) in the radial direction. The second sliding block (2462) is coaxially arranged in the second installation cavity and slides along the axial direction. The adjusting rod (2463) is arranged at the top end of the second sliding block (2462). The adjusting rod (2463) extends obliquely upward from the top end of the second sliding block (2462) and approaches the axis of the telescopic rod (23). The adjusting rod (2463) penetrates the second plug (2461) and is in sliding fit with the second plug (2461). The second electromagnet (2464) is arranged in the second installation cavity. The second spring (2465) is arranged between the second sliding block (2462) and the second electromagnet (2464). The second sliding block (2462) drives the second plug (2461) to block the gate hole (2441) by the action of the second spring (2465) through the adjusting rod (2463).

4. The anti-fracture pressing device for emergency rescue according to claim 2 or 3, characterized in that, The bottom end of the inner circumferential surface of the first installation cavity is provided with a stepped groove, which extends downward to form an internally threaded cylinder (2442). The telescopic rod (23) is threadedly connected with the internally threaded cylinder (2442) and abuts in the stepped groove.

5. The anti-fracture pressing device for emergency rescue according to claim 2 or 3, characterized in that, The bottom end of the outer circumference surface of the inner cylinder (242) is provided with a closed ring (2421) coaxial with it, the closed ring (2421) divides the ring cavity into an upper cavity and a lower cavity, the transmission device (24) further comprises a piston ring (247) and an elastic connecting piece, the piston ring (247) is coaxially and slidingly arranged in the lower cavity, the elastic connecting piece is arranged between the piston ring (247) and the closed ring (2421), and the hydraulic oil at the bottom of the piston ring (247) overcomes the elastic force of the elastic connecting piece and approaches the closed ring (2421).

6. The anti-fracture pressing device for emergency rescue according to claim 5, characterized in that, The elastic connecting piece comprises a limiting ring (2481), a connecting rod (2482) and a third spring (2483), the limiting ring (2481) is coaxially and slidingly arranged in the upper cavity, the connecting rod (2482) penetrates through the closed ring (2421) and is in sliding fit with it, the bottom end of the connecting rod (2482) is fixedly connected with the piston ring (247), the top end of the connecting rod (2482) is fixedly connected with the limiting ring (2481), and the third spring (2483) is sleeved on the connecting rod (2482), and the two ends of the third spring (2483) are respectively abutted against the top end of the piston ring (247) and the bottom end of the closed ring (2421).

7. The anti-fracture pressing device for emergency rescue according to claim 6, characterized in that, The outer diameter of the limiting ring (2481) is smaller than the inner diameter of the sealing cylinder (241), the inner diameter of the limiting ring (2481) is greater than the outer diameter of the inner cylinder (242), the top of the limiting ring (2481) is injected with a magnetorheological fluid, and the outer circumference surface of the sealing cylinder (241) is provided with a solenoid (26) coaxial with it.

8. The anti-fracture pressing device for emergency rescue according to claim 7, characterized in that, The lower part of the sealing cylinder (241) is provided with a pressure sensor (27) capable of detecting the hydraulic oil pressure in the inner cavity thereof.

9. The anti-fracture pressing device for emergency rescue according to claim 7 or 8, characterized in that, The sealing cylinder (241) comprises a cylinder body (2411) and a sealing cover (2412), the cylinder body (2411) is arranged in the shell (21), the bottom end of the cylinder body (2411) is closed and the top end is open, the sealing cover (2412) is coaxially arranged at the top end of the cylinder body (2411), the inner cylinder (242) is coaxially arranged at the bottom end of the sealing cover (2412), and the sealing cylinder (241) is provided with an oil injection hole capable of communicating with the outside, and the outer side of the oil injection hole is provided with an oil injection plug.

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