CN115813670B - Rescue stretcher for emergency treatment - Google Patents
Rescue stretcher for emergency treatment Download PDFInfo
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- CN115813670B CN115813670B CN202211471617.2A CN202211471617A CN115813670B CN 115813670 B CN115813670 B CN 115813670B CN 202211471617 A CN202211471617 A CN 202211471617A CN 115813670 B CN115813670 B CN 115813670B
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Abstract
The invention belongs to the technical field of medical appliances, and particularly relates to an emergency rescue stretcher for emergency treatment; the telescopic support comprises a rectangular frame formed by two second support rods and two telescopic first support rods, wherein the second support rods are longer than the first support rods, two ends of each second support rod are respectively provided with a vertical upward electric telescopic push rod, the top ends of the electric telescopic push rods on the same side are connected by support rods, and a reticular telescopic support plate is arranged between the two support rods; the side walls of the support rods facing each other are provided with horizontal first sliding grooves, a plurality of first electromagnetic sliding blocks sliding horizontally are arranged in the first sliding grooves, the outer sides of the first electromagnetic sliding blocks are fixedly connected with hinge points at two ends of the telescopic support plates, and a flexible backing plate is further arranged on the surface of the telescopic support plates between the two support rods; the stretcher can keep the body of a patient in a horizontal state all the time when the patient is transported at a gradient, so that the patient can not incline due to different stand heights of front and rear medical staff, and secondary injury caused by inclination is reduced.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to an emergency rescue stretcher for emergency treatment.
Background
At present, the stretcher is an important rescue tool in accident rescue, is widely applied to disasters such as war, car accidents, earthquakes and the like, and can effectively save lives of patients by timely transporting injured patients. The existing stretcher is provided with a simple stretcher, a stretcher transfer trolley or a semi-automatic stretcher trolley, but the simple stretcher can only play a role of transferring patients on a basis, and the patients can be further damaged due to improper transportation during transfer. In some remote mountain areas, the stretcher transport vehicle cannot be put into use effectively in time due to the large gradient of mountain bodies and complex road conditions.
Some stretcher is also improved, such as a rescue stretcher with the publication number of CN106038089A, although a shielding device is arranged, the stretcher can prevent the wound of a patient from being infected when the patient is in rain during transportation, and has a certain protection effect on the wound. However, when the stretcher is inclined during transportation, the body of an injured patient is inclined along with the inclination, the process can cause secondary injuries such as nerve compression and cerebral congestion to the patient, and in order to keep the body of the patient balanced, additional force is required to be applied to control the patient, so that rescue force is consumed, and a plurality of inconveniences are caused when the body of the patient is controlled.
Disclosure of Invention
Therefore, the present invention is directed to an emergency rescue stretcher for solving the technical problem that when a patient is transported on a mountain slope, the patient body is inclined along with the slope to cause secondary injury.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides an emergency first aid rescue stretcher, which comprises a rectangular frame formed by two second support rods and two telescopic first support rods, wherein the second support rods are longer than the first support rods, two ends of each second support rod are respectively provided with a vertical upward electric telescopic push rod, the top ends of the electric telescopic push rods on the same side are connected by support rods, and a net-shaped stretchable telescopic support plate is arranged between the two support rods; the lateral wall that the bracing piece is mutually oriented has all offered horizontal first spout, all is equipped with a plurality of first electromagnetic slide blocks along horizontal slip in the first spout, and the pin joint fixed connection at first electromagnetic slide block outside and flexible extension board both ends still is equipped with flexible backing plate at flexible extension board surface between two spinal branch vaulting poles.
Further, the first support rods comprise outer sleeve rods and inner sleeve rods sliding in the outer sleeve rods, one sides of the two outer sleeve rods, which are opposite, are respectively provided with a horizontal thread sleeve, threaded rods which are in matched connection with the two outer sleeve rods are arranged in the thread sleeves, one ends of the threaded rods, which are far away from the thread sleeves, are provided with horizontal connecting rods, the tail ends of the connecting rods are respectively provided with an auxiliary support plate which inclines upwards, the two auxiliary support plates face each other, the surfaces of the two auxiliary support plates are respectively provided with a plurality of strip-shaped holes side by side along the length direction of the two auxiliary support plates, the two auxiliary support plates are mutually connected in a cross manner through the strip-shaped holes, the top ends of the auxiliary support plates are hinged with horizontal transverse plates, and the transverse plates comprise outer sleeve plates and inner sleeve plates which are in sliding connection with the outer sleeve plates; two horizontal second sliding grooves are formed in the bottom wall of the outer sleeve plate, second electromagnetic sliding blocks which horizontally slide are arranged in the second sliding grooves, and the top ends of the auxiliary support plates are hinged with the corresponding second electromagnetic sliding blocks respectively; the surface of the connecting rod is provided with a horizontal third chute, a third electromagnetic slide block horizontally sliding along the third chute is arranged in the third chute, and the bottom end of the auxiliary support plate is hinged with the third electromagnetic slide block.
Further, horizontal fourth sliding grooves are formed in the surfaces of the second support rods on the two sides of each electric telescopic push rod, fourth electromagnetic sliding blocks which horizontally slide are arranged in the fourth sliding grooves, and auxiliary rods connected with the side walls of the top ends of the electric telescopic push rods are hinged to the surfaces of the fourth electromagnetic sliding blocks.
Further, the surface of the supporting rod is provided with a concave guardrail.
Further, a semicircular groove is formed in the surface of one support rod at the outer side of the two ends of the guardrail, a fifth electromagnetic slide block attached to the concave surface is arranged in the groove, and the guardrail is connected with the surface of the fifth electromagnetic slide block.
Further, a horizontal slot is formed in one outward side of the other support rod, a sixth electromagnetic sliding block which horizontally slides is arranged in the slot, a storage barrel which is vertically upwards arranged and is opened at the top is connected to the outer side of the sixth electromagnetic sliding block, and a vertically upwards infusion rod is arranged in the storage barrel.
Further, the wheel pole that outer loop pole and endotheca pole kept away from each other all articulate there is scalable pole one end, and the wheel pole bottom is equipped with the universal wheel, and every second branch both ends all are equipped with the ring of fixed wheel pole, and the ring bottom is equipped with the opening that holds the wheel pole and pass.
Further, a plurality of safety belts are further arranged between the two support rods along the horizontal direction, two ends of each safety belt are fixedly connected with the two support rods respectively, the middle part of each safety belt can be detached, one side of each safety belt is provided with an inserting buckle, and the other side of each safety belt is provided with an inserting hole matched with the inserting buckle.
The invention has the beneficial effects that:
1. the stretcher can keep the body of a patient in a horizontal state all the time when the patient is transported at a gradient, so that the patient can not incline due to different stand heights of front and rear medical staff, and secondary injury caused by inclination is reduced;
2. the stretcher is not limited to transport patients in the length direction, but only when encountering a gradient, the electric telescopic push rod positioned below the gradient can be stretched to be flush with the electric telescopic push rod positioned above the gradient, so that the body of the patient is always in a horizontal state;
3. the stretcher can be propelled on flat ground by using the universal wheels, and can also be used for carrying out operations such as transfusion and the like in the transportation process, so that the life of a patient is saved in time;
4. when the patient does not need to be transported, the stretcher disclosed by the invention can be contracted, so that the stretcher is convenient to transport or store, and the rescue speed is increased.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is a cross-sectional view of a partial telescopic support plate connection structure of the present invention;
FIG. 4 is an enlarged schematic view of portion A of FIG. 1;
FIG. 5 is a schematic view of the present invention partially disassembled;
fig. 6 is a partially disassembled schematic illustration of the present invention.
The figures are marked as follows: the first supporting rod 11, the outer sleeve rod 111, the inner sleeve rod 112, the second supporting rod 12, the fourth sliding groove 121, the fourth electromagnetic sliding block 122, the auxiliary rod 13, the electric telescopic pushing rod 2, the supporting rod 3, the first sliding groove 31, the first electromagnetic sliding block 32, the groove 33, the fifth electromagnetic sliding block 34, the groove 35, the sixth electromagnetic sliding block 36, the object placing cylinder 37, the infusion rod 38, the telescopic supporting plate 4, the flexible backing plate 5, the threaded sleeve 61, the threaded rod 62, the connecting rod 63, the third sliding groove 631, the third electromagnetic sliding block 632, the auxiliary supporting plate 64, the transverse plate 65, the outer sleeve plate 651, the inner sleeve plate 652, the second sliding groove 653, the second electromagnetic sliding block 654, the guardrail 7, the wheel rod 8, the universal wheel 81, the circular ring 82, the opening 83 and the safety bandage 9.
Detailed Description
As shown in fig. 1-6, the invention provides an emergency rescue stretcher, which comprises a rectangular frame formed by two first supporting rods 11 and two second supporting rods 12, wherein the two first supporting rods 11 are telescopic, the two second supporting rods 12 are longer than the first supporting rods 11, two ends of the two second supporting rods 12 are respectively provided with an electric telescopic push rod 2 which is vertically upwards, the top ends of the electric telescopic push rods 2 on the same side are connected by supporting rods 3, and a net-shaped stretchable telescopic supporting plate 4 is arranged between the two supporting rods 3; two bracing pieces 3 have offered horizontal first spout 31 towards one another's one side, evenly are equipped with a plurality of along first spout 31 horizontal slip first electromagnetic slide 32 in the first spout 31, and the pin joint and the first electromagnetic block fixed connection at flexible extension board 4 both ends still are equipped with flexible backing plate 5 between two bracing pieces 3, flexible backing plate 5 and flexible extension board 4 butt.
In the scheme, when a patient is needed to be rescued, the patient is placed on the surface of the flexible base plate 5 to lie flat, then the medical staff lifts the first supporting rod 11 back and forth, when the patient is transported in a slope zone, the two electric telescopic rods on the second supporting rod 12 positioned below the slope are upwards stretched and are in the same horizontal state with the two electric telescopic rods on the second supporting rod 12 positioned above the slope, so that the body of the patient tends to be horizontal, the inclination of the rectangular frame is not caused along with the difference of the heights of the medical staff, the stretcher is not limited to transport the patient on a steep slope in the length direction or the width direction, and as long as the patient is transported in the slope zone, the electric telescopic pushing rod 2 positioned below the slope is stretched to be flush with the electric telescopic pushing rod 2 positioned above the slope, so that the body of the patient is always in the horizontal state, and secondary injury to the patient can be avoided; when the patient does not need to be transported, the two first supporting rods 11 are shortened, the telescopic supporting plates 4 can be extruded when the first supporting rods 11 are shortened, the first electromagnetic sliding blocks 32 can slide in the first sliding grooves 31 to enable the telescopic supporting plates 4 to shrink after power is off, and the flexible backing plates 5 are in flexible states, so that the stretcher can be contracted, and the stretcher is convenient to store or transport in mountains.
The first supporting rod 11 comprises an outer sleeve rod 111 and an inner sleeve rod 112 which are hollow in the interior, the inner sleeve rod 112 is connected in a sliding manner in the outer sleeve rod 111, a horizontal threaded sleeve 61 is arranged on one side of the two outer sleeve rods 111 facing each other, an opening 83 is arranged on one side of the threaded sleeve 61 facing each other, a horizontal threaded rod 62 is connected in the threaded sleeve 61 in a threaded manner, a horizontal connecting rod 63 is arranged on one side of the threaded rod 62 far away from the threaded sleeve 61, an auxiliary supporting plate 64 which is inclined upwards is arranged at the tail end of the connecting rod 63, the two auxiliary supporting plates 64 face each other, two strip-shaped holes are formed in the surfaces of the two auxiliary supporting plates 64 along the length direction, and the two auxiliary supporting plates 64 are connected in a cross manner through the strip-shaped holes; the top end of the auxiliary supporting plate 64 is hinged with a horizontal transverse plate 65, the surface of the transverse plate 65 is abutted against the bottom surface of the telescopic supporting plate 4, the transverse plate 65 is divided into an outer sleeve plate 651 and an inner sleeve plate 652 along the length direction, the inner sleeve plate 652 is connected with the outer sleeve plate 651 in a sliding mode, two second sliding grooves 653 are formed in the bottom surface of the outer sleeve plate 651, second electromagnetic sliding blocks 654 which slide horizontally are arranged in the second sliding grooves 653, the top end of the auxiliary supporting plate 64 is hinged with the corresponding second electromagnetic sliding blocks 654, horizontal third sliding grooves 631 are formed in the surface of the connecting rod 63, third electromagnetic sliding blocks 632 which slide horizontally along the third sliding grooves 631 are arranged in the third sliding grooves 631, and the bottom end of the auxiliary supporting plate 64 is hinged with the third electromagnetic sliding blocks 632.
In the scheme, when a patient is placed on the flexible base plate 5, the telescopic support plate 4 and the transverse plate 65 support the patient, so that the patient can lie on the stretcher more firmly; when a slope is needed, the top end of the lower auxiliary support plate 64 can slide in the direction above the slope in the second chute 653 by switching off the power supply through the second electromagnetic slide block 654, and the bottom end of the lower auxiliary support plate 64 can slide in the direction below the slope through the third chute 631 by switching off the power supply through the third electromagnetic slide block 632, so that the upper auxiliary support plate 64 tends to be horizontal, the body of a patient is in a horizontal state, and the stability of the whole stretcher is further improved; when the patient does not need to be transported, the inner sleeve rod 112 is retracted into the outer sleeve rod 111, and the inner sleeve plate 652 is driven to retract into the outer sleeve plate 651, so that the stretcher can be transversely contracted, and when the electric telescopic push rod 2 is contracted downwards, the two auxiliary support plates 64 are transversely contracted to be horizontal, so that the stretcher can be vertically compressed.
The surface of the second supporting rod 12 is provided with horizontal fourth sliding grooves 121 on two sides of each electric telescopic pushing rod 2, fourth electromagnetic sliding blocks 122 which horizontally slide are arranged in the fourth sliding grooves 121, and auxiliary rods 13 connected with the side walls of the top ends of the electric telescopic pushing rods 2 are hinged to the surfaces of the fourth electromagnetic sliding blocks 122.
In this scheme, when electric telescopic pushing rod 2 upwards moves, the outage of fourth electromagnetic slide block 122 is in fourth spout 121 removal, and auxiliary stay can be close to each other along with electric telescopic pushing rod 2's extension and slide, along with electric telescopic pushing rod 2's shortening and keep away from each other and slide, can form the support to electric telescopic pushing rod 2 like this for stretcher is more firm when transporting the patient.
The surfaces of the two support rods 3 are provided with inverted concave guardrails 7.
In this scheme, guardrail 7 can prevent that the patient from turning on one's side, reduces patient's risk of secondary injury.
The surface of one support rod 3 is provided with a semicircular 82-shaped groove 33 at the two ends of the guardrail 7 outwards, a fifth electromagnetic slide block 34 attached to the concave surface is arranged in the groove 33, and the guardrail 7 is connected with the surface of the fifth electromagnetic slide block 34.
In this scheme, the outage of fifth electromagnetic slide 34 drives the both ends of guardrail 7 and follows the recess 33 of semicircle ring 82 form and slide downwards, and guardrail 7 can the downwardly moving, lifts the patient and carries on flexible backing plate 5 again, then controls the upward slip of recess 33 that the both ends that the fifth electromagnetic slide 34 was electrified again can drive guardrail 7 along semicircle ring 82 form, and guardrail 7 can form and shelter from like this, reduces the patient and turn on one's side.
The other support rod 3 is provided with a horizontal slot 35 on one side outwards, a sixth electromagnetic slide block 36 sliding horizontally is arranged in the slot 35, the outer side of the sixth electromagnetic slide block 36 is connected with a storage cylinder 37 with a vertical upward top opening 83, and a vertical upward transfusion rod 38 is arranged in the storage cylinder 37.
In this scheme, infusion bottle can be hung to infusion pole 38, carries out the treatment to the patient under emergency, cuts off the power supply to sixth electromagnetic slide 36 drives puts thing section of thick bamboo 37 and slides in fluting 35, hangs according to patient's position and hangs, convenient and fast.
The wheel rod 8 of telescopic rod is all articulated to the one end that outer sleeve pole 111 and interior sleeve pole 112 kept away from each other, and wheel rod 8 bottom is equipped with universal wheel 81, and every second branch 12 both ends all are equipped with the ring 82 of fixed wheel rod 8, and the ring 82 bottom is equipped with the opening 83 that holds wheel rod 8 and pass.
In this scheme, after the transportation patient arrives the road surface on the level land, take out wheel pole 8 from ring 82, make universal wheel 81 and ground contact, can promote the patient like this, reduce medical personnel's power consumption, promote the patient also can be more quick, practice thrift the valuable rescue time.
Six safety belts 9 are further arranged between the two support rods 3 along the horizontal direction, two ends of each safety belt 9 are fixedly connected with the two support rods 3 respectively, the middle part of each safety belt 9 can be detached, one side of each safety belt is provided with an inserting buckle, and the other side of each safety belt is provided with an inserting hole matched with the inserting buckle.
In this scheme, after placing the patient on flexible backing plate 5, with the eye-splice in inserting the jack, form fixedly to the patient, further ensure patient's stability and security.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides an emergency call first aid stretcher, includes the rectangular frame that comprises two second branches, two telescopic first branches, and second branch is longer than first branch, its characterized in that: the two ends of the second supporting rod are respectively provided with an electric telescopic push rod which is vertically upwards, the top ends of the electric telescopic push rods on the same side are connected by supporting rods, and a reticular telescopic supporting plate is arranged between the two supporting rods; the side walls of the support rods facing each other are provided with horizontal first sliding grooves, a plurality of first electromagnetic sliding blocks sliding horizontally are arranged in the first sliding grooves, the outer sides of the first electromagnetic sliding blocks are fixedly connected with hinge points at two ends of the telescopic support plates, and a flexible backing plate is further arranged on the surface of the telescopic support plates between the two support rods; the first support rods comprise outer sleeve rods and inner sleeve rods sliding in the outer sleeve rods, one sides of the two outer sleeve rods opposite to each other are respectively provided with a horizontal threaded sleeve, threaded rods matched and connected with the threaded sleeves are arranged in the threaded sleeves, one ends of the threaded rods, which are far away from the threaded sleeves, are provided with horizontal connecting rods, the tail ends of the connecting rods are respectively provided with an auxiliary support plate inclining upwards, the two auxiliary support plates face each other, the surfaces of the two auxiliary support plates are respectively provided with a plurality of strip-shaped holes side by side along the length direction of the two auxiliary support plates, the two auxiliary support plates are mutually and crosswise connected through the strip-shaped holes, the top ends of the auxiliary support plates are hinged with horizontal transverse plates, the transverse plates are divided into outer sleeve plates and inner sleeve plates along the length direction, and the inner sleeve plates are in sliding connection in the outer sleeve plates; two horizontal second sliding grooves are formed in the bottom wall of the outer sleeve plate, second electromagnetic sliding blocks which horizontally slide are arranged in the second sliding grooves, and the top ends of the auxiliary support plates are hinged with the corresponding second electromagnetic sliding blocks respectively; the surface of the connecting rod is provided with a horizontal third chute, a third electromagnetic slide block horizontally sliding along the third chute is arranged in the third chute, and the bottom end of the auxiliary support plate is hinged with the third electromagnetic slide block.
2. An emergency rescue stretcher as defined in claim 1, wherein: the surface of the second supporting rod is provided with horizontal fourth sliding grooves on two sides of each electric telescopic push rod, fourth electromagnetic sliding blocks which horizontally slide are arranged in the fourth sliding grooves, and auxiliary rods connected with the side walls of the top ends of the electric telescopic push rods are hinged to the surface of each fourth electromagnetic sliding block.
3. An emergency rescue stretcher as defined in claim 1, wherein: the surface of the supporting rod is provided with a concave guardrail.
4. An emergency rescue stretcher as defined in claim 1, wherein: one of the support rod surfaces is provided with a semicircular groove at one outward side of the two ends of the guardrail, a fifth electromagnetic slide block attached to the concave surface is arranged in the groove, and the guardrail is connected with the fifth electromagnetic slide block surface.
5. An emergency rescue stretcher as defined in claim 1, wherein: the other support rod is provided with a horizontal slot towards one outer side, a sixth electromagnetic slide block which horizontally slides is arranged in the slot, the outer side of the sixth electromagnetic slide block is connected with a vertically upward storage cylinder with an opening at the top, and a vertically upward infusion rod is arranged in the storage cylinder.
6. An emergency rescue stretcher as defined in claim 1, wherein: the wheel rod of telescopic link is all articulated to the one end that outer sheath pole and interior sleeve pole kept away from each other, and the wheel rod bottom is equipped with the universal wheel, and every second branch both ends all are equipped with the ring of fixed wheel pole, and the ring bottom is equipped with the opening that holds the wheel pole and pass.
7. An emergency rescue stretcher as defined in claim 1, wherein: a plurality of safety belts are further arranged between the two support rods along the horizontal direction, two ends of each safety belt are fixedly connected with the two support rods respectively, the middle part of each safety belt can be detached, one side of each safety belt is provided with an inserting buckle, and the other side of each safety belt is provided with an inserting hole matched with the inserting buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211471617.2A CN115813670B (en) | 2022-11-23 | 2022-11-23 | Rescue stretcher for emergency treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211471617.2A CN115813670B (en) | 2022-11-23 | 2022-11-23 | Rescue stretcher for emergency treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115813670A CN115813670A (en) | 2023-03-21 |
| CN115813670B true CN115813670B (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211471617.2A Active CN115813670B (en) | 2022-11-23 | 2022-11-23 | Rescue stretcher for emergency treatment |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005124592A (en) * | 2003-10-21 | 2005-05-19 | Kazuhiko Sasai | Stretcher |
| CN201642604U (en) * | 2010-04-16 | 2010-11-24 | 刘义君 | Telescopic stretcher |
| CN207950019U (en) * | 2017-11-01 | 2018-10-12 | 微微（杭州）信息技术有限公司 | A kind of extensible stretcher of medical treatment |
| CN108969210B (en) * | 2018-06-28 | 2020-10-02 | 吉林大学 | Self-balancing stretcher mechanism for post-earthquake rescue |
| CN209951599U (en) * | 2019-04-02 | 2020-01-17 | 华东理工大学 | Bradyseism formula stretcher conveyer |
| CN210673584U (en) * | 2019-07-17 | 2020-06-05 | 江南大学附属医院（无锡市第四人民医院） | Stretcher suitable for fracture patient |
| CN211705065U (en) * | 2019-11-12 | 2020-10-20 | 李莹 | Emergency call emergency nursing stretcher |
| CN212662105U (en) * | 2020-04-09 | 2021-03-09 | 梁富 | Bed sheet for emergency treatment |
| CN213525955U (en) * | 2020-07-30 | 2021-06-25 | 自贡市妇幼保健院 | Emergency call emergency nursing stretcher |
| CN214909335U (en) * | 2021-02-26 | 2021-11-30 | 重庆医药高等专科学校 | Emergency stretcher |
| CN215606950U (en) * | 2021-05-19 | 2022-01-25 | 北部湾大学 | Self-balancing rescue device for marine rescue |
| CN113317933A (en) * | 2021-05-31 | 2021-08-31 | 西安理工大学 | Electric stair climbing transportation stretcher |
| CN113520733A (en) * | 2021-07-06 | 2021-10-22 | 陈芳 | Nursing stretcher vehicle convenient to transport |
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2022
- 2022-11-23 CN CN202211471617.2A patent/CN115813670B/en active Active
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