Multi-gear turnover guardrail and wheel stretcher
By using a multi-position flip-up guardrail design and employing locking pins and linkage mechanisms to achieve multi-angle adjustment of the guardrail, the problem of existing stretcher vehicle guardrails being unable to be adjusted is solved, providing a flexible rescue environment and high stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU RIXIN MEDICAL EQUIP
- Filing Date
- 2025-03-17
- Publication Date
- 2026-04-14
AI Technical Summary
The guardrails on existing medical stretchers cannot be adjusted to open at different angles, which cannot meet the transport needs of patients of different body sizes and affects the effectiveness of rescue.
Design a multi-position flip guardrail, which is connected to a fixed base by a hinge. The guardrail can be flipped at multiple angles by using a locking pin and a linkage mechanism. Combined with an elastic mechanism and a guide structure, the guardrail can be moved and inserted between different slots to adjust the angle.
It achieves flexible adjustment of the guardrail, adjusting the opening and closing angle according to the patient's body size, providing a comfortable rescue environment, and is easy to operate and highly stable.
Smart Images
Figure CN224112910U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical equipment technology, specifically to a multi-position tilting guardrail and a stretcher trolley. Background Technology
[0002] Medical stretchers are commonly used medical equipment for emergency diagnosis and rescue. Currently, most stretchers have fixed guardrails. Fixed guardrails cannot be adjusted in opening angle, which cannot meet the transport needs of patients with larger bodies, and cannot provide a good rescue environment for patients during rescue. This inconvenience and affects the rescue effect. Utility Model Content
[0003] The first objective of this utility model is to provide a multi-position flip guardrail that is easy to operate and use.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: a multi-position tilting guardrail, including a guardrail shell, two fixing seats for connecting and fixing to a stretcher, a left-right oriented shaft installed at the lower end of the guardrail shell, the two fixing seats respectively sleeved on the left and right ends of the shaft, so that the guardrail shell is connected to the two fixing seats by the shaft hinge; a mounting seat fixed to the guardrail shell is respectively provided on one side of each fixing seat, and a number of slots are arranged circumferentially around the shaft on the end face of the fixing seat opposite to the corresponding mounting seat in each fixing seat; a guide hole penetrating the mounting seat in the left-right direction is provided in each mounting seat. Each mounting base has a guide hole through which a locking pin is inserted into each slot. As the guardrail housing rotates around its axis relative to the fixed seat of the stretcher towards the outside of the stretcher, the locking pin passes through each slot on the end face of the corresponding fixed seat in sequence. A handle is provided on the upper part of the guardrail housing. The locking pins on the two mounting bases are respectively connected to the left and right ends of the handle through a linkage mechanism. Each linkage mechanism is provided with an elastic mechanism. The elastic mechanism enables the corresponding locking pin connected to the corresponding linkage mechanism to be translated and inserted into the corresponding slot when the guardrail housing rotates through the corresponding slot, so as to connect the guardrail housing to the fixed seat in a corresponding flipped posture.
[0005] Furthermore, in the aforementioned multi-position tilting guardrail, the linkage mechanism includes: linkage one, guide seat one, guide rod, connector one, linkage two, and connector two;
[0006] One end of the connecting rod is hinged to the handle via a first pin, and the other end of the connecting rod has a first waist hole.
[0007] The guide seat is located on one side of the handle and above the fixed seat. The guide seat has a guide channel running left and right. The guide rod is movably inserted through the guide channel of the guide seat. The end of the guide rod near the handle has a first through hole, which corresponds to the first waist hole of the connecting rod. A first connecting bolt is inserted in the corresponding first through hole and first waist hole. After the first connecting bolt passes through the first through hole and first waist hole, a first connecting nut is threaded onto it.
[0008] A connector is fixed to the far end of the guide rod, and a second through hole is provided on the connector.
[0009] The middle part of the second connecting rod is hinged to the guardrail housing between the guide rod and the corresponding locking pin via a second pin. A second waist hole is provided at the upper end of the second connecting rod, which corresponds to the second through hole of the first connecting head. A second connecting bolt is inserted in the corresponding second through hole and the second waist hole. After the second connecting bolt passes through the corresponding second through hole and the second waist hole, a second connecting nut is threaded onto it. A third waist hole is provided at the lower end of the second connecting rod.
[0010] The second connector is fixed to the end of the locking pin away from the corresponding fixed seat. A third through hole is provided on the second connector, which corresponds to the third waist hole of the second connecting rod. A third connecting bolt is passed through the corresponding third through hole and the third waist hole. After the third connecting bolt passes through the corresponding third through hole and the third waist hole, a third connecting nut is threadedly connected to it.
[0011] Furthermore, in the aforementioned multi-position flip guardrail, the structure of the guide channel in the guide seat one is as follows: an upper guide wheel group and a lower guide wheel group are arranged in a vertically opposite manner in the guide seat one, and the gap between the upper guide wheel group and the lower guide wheel group forms a guide channel.
[0012] Furthermore, in the aforementioned multi-position flip guardrail, the elastic mechanism includes the following structure: the guide hole in the mounting base through which the locking pin passes is a stepped hole, the larger diameter section of the stepped hole faces the corresponding fixed base, the outer diameter of the locking pin forms a protruding shoulder, and a first spring is sleeved on the outside of the locking pin, one end of the first spring abuts against the shoulder of the locking pin and the other end abuts against the stepped surface of the guide hole.
[0013] Furthermore, the aforementioned multi-position flip guardrail also includes a second spring and a second guide seat. The second guide seat is fixedly installed on the guardrail housing between the first guide seat and the first connector. The second guide seat has a stepped hole that runs horizontally through the second guide seat and corresponds to the guide channel of the first guide seat. The larger diameter section of the stepped hole faces the first connector. The guide rod passes through the guide channel and the stepped hole of the second guide seat in sequence before being fixed to the first connector. The guide rod between the first connector and the second guide seat is fitted with a second spring. One end of the second spring abuts against the first connector and the other end abuts against the stepped surface of the stepped hole of the second guide seat.
[0014] Furthermore, in the aforementioned multi-position tilting guardrail, each fixed seat has a slot on its corresponding end face including: an upright position slot, an inclined position slot, a horizontal position slot, and a lowered position slot. As the guardrail housing rotates around its axis relative to the fixed seat on the stretcher trolley towards the outside of the stretcher trolley, the locking pin corresponding to the fixed seat will sequentially pass through the upright position slot, inclined position slot, horizontal position slot, and lowered position slot on the end face of the corresponding fixed seat. The position of the upright position slot ensures that when the locking pin is inserted into the upright position slot, the guardrail housing remains upright relative to the fixed seat and the stretcher trolley. The positions of the tilting slots on the guardrail ensure that the guardrail housing is tilted relative to the fixed seat and stretcher when the locking pin is inserted into the tilting slot. The positions of the flat slots on the guardrail ensure that the guardrail housing is flat relative to the fixed seat and stretcher when the locking pin is inserted into the flat slot. The positions of the lowering slots on the guardrail ensure that the guardrail housing is lowered relative to the fixed seat and stretcher when the locking pin is inserted into the lowering slot. The end face of the fixed seat located between the lowering slot and the flat slot of the guardrail in each fixed seat smoothly transitions downward to the bottom surface of the lowering slot through the guide slope.
[0015] Furthermore, in the aforementioned multi-position flip guardrail: a handle receiving and guiding cavity is provided inside the guardrail housing, which is composed of an upper limit plate, a lower limit plate, a left limit plate, a right limit plate, and the front and rear side walls of the guardrail housing. The handle is located in the handle receiving and guiding cavity. The side wall of the guardrail housing where the handle receiving and guiding cavity is located is hollowed out to form an operating opening for people to grip the handle. Two positioning posts are provided on the upper limit plate, which extend into the handle receiving and guiding cavity. Two spring positioning grooves are provided at the handle end facing the upper limit plate. The two spring positioning grooves correspond one-to-one with the two positioning posts. A return spring is provided between each corresponding spring positioning groove and positioning post. One end of the return spring is sleeved on the positioning post and abuts upward against the upper limit plate, and the other end is inserted into the spring positioning groove. Each return spring ensures that the handle always has the tendency to move downward along the handle receiving and guiding cavity to return to the lower limit plate.
[0016] Furthermore, in the aforementioned multi-position tilting guardrail: on the left and right sides of each fixed seat, there is a retaining ring fixedly installed on the shaft. Each retaining ring limits the axial position of the fixed seat on the shaft, so that the fixed seat can rotate relative to the shaft but cannot move along the shaft.
[0017] Furthermore, in the aforementioned multi-position tilting guardrail, a tilting limiting mechanism is provided between the guardrail housing and the fixed seat to prevent the guardrail housing from excessively rotating towards the inside of the stretcher trolley relative to the fixed seat. The tilting limiting mechanism includes: a shaft fixedly installed on the guardrail housing so that the shaft can rotate synchronously with the guardrail housing; an arc-shaped limiting groove is provided circumferentially on the outer peripheral wall of the shaft at the location of the fixed seat; a limiting screw is provided on the fixed seat; the limiting screw extends into the arc-shaped limiting groove; the curve shape of the arc-shaped limiting groove ensures that when the shaft rotates upward relative to the fixed seat with the guardrail housing until one end of the arc-shaped limiting groove abuts against the limiting screw, the guardrail housing is in an upright position; and when the shaft rotates downward relative to the fixed seat with the guardrail housing until the other end of the arc-shaped limiting groove abuts against the limiting screw, the guardrail housing is in a lowered position.
[0018] The second objective of this invention is to provide a stretcher cart that is easy to operate and use.
[0019] To achieve the above objectives, the present invention adopts the following technical solution: a stretcher cart, including a stretcher cart body, with multi-position tilting guardrails installed on the left and right sides of the stretcher cart body.
[0020] Through the implementation of the above technical solution, the beneficial effects of this utility model are: it is very convenient to operate and use, has high stability, and can adjust the opening and closing angle of the guardrail according to different patient body shapes, providing a comfortable rescue environment for patients. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of the multi-position flip guardrail described in this utility model.
[0022] Figure 2 for Figure 1 The diagram shows a structural schematic of the AA cross section.
[0023] Figure 3 for Figure 2 An enlarged schematic diagram of part B shown in the figure.
[0024] Figure 4 for Figure 2 An enlarged schematic diagram of part C shown in the figure.
[0025] Figure 5 for Figure 2 An enlarged schematic diagram of part D shown in the figure.
[0026] Figure 6 for Figure 5 The structural diagram after removing connecting rod 1, guide rod, connector 1, connecting rod 2, connector 2 and locking pin.
[0027] Figure 7 This is a schematic diagram of the locking pin structure.
[0028] Figure 8 for Figure 1 The right view.
[0029] Figure 9 for Figure 8 The diagram shows the fitting relationship between the limiting screw and the arc-shaped limiting groove of the shaft in the EE section shown.
[0030] Figure 10 This is a schematic diagram showing the state of the guardrail shell when it is flipped outward from the fixed seat on the stretcher to an upright position.
[0031] Figure 11 This is a schematic diagram showing the state of the guardrail shell when it is flipped outwards from the fixed seat on the stretcher and laid flat.
[0032] Figure 12 This is a schematic diagram showing the state of the guardrail shell when it is flipped outward from the fixed seat of the stretcher and placed in a lowered position.
[0033] Figure 13 This is a schematic diagram of the fixed base.
[0034] Figure 14 for Figure 13 A schematic diagram of the structure viewed from the left.
[0035] Figure 15 This is a three-dimensional view of the mounting base.
[0036] Figure 16 This is a schematic diagram of the shaft structure.
[0037] Figure 17 for Figure 16 The diagram shows a structural schematic of the FF cross-section.
[0038] Figure 18 A three-dimensional diagram with axis as the axis.
[0039] Figure 19 This is a schematic diagram of the stretcher cart. Detailed Implementation
[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 10 , Figure 11 , Figure 12 As shown, the multi-position flip guardrail 200 includes a guardrail housing 1 and two fixing seats 3 for connecting and fixing to a stretcher 2. A left-right oriented shaft 4 is installed at the lower end of the guardrail housing 1. Each fixing seat has a hole 312 for the shaft 4 to pass through at the upper part and a connecting part 313 for connecting and fixing to the stretcher 2 at the lower part. The two fixing seats 3 are movably sleeved on the left and right ends of the shaft 4 through the corresponding holes 312. A shaft retaining ring 5 is fixedly installed on the shaft 4 on the left and right sides of each fixing seat 3. Each shaft retaining ring 5 limits the axial position of the fixing seat 3 on the shaft 4 so that the fixing seat 3 can rotate relative to the shaft 4 but cannot move along the shaft 4, so that the guardrail housing 1 is stably hinged to the two fixing seats 3 through the shaft 4.
[0042] Each fixed base 3 has a corresponding mounting base 6 fixed to the guardrail housing 1 on its outer side, such as... Figure 13 , Figure 14 , Figure 15 As shown, in each fixed seat 3, several slots are arranged circumferentially around the shaft 4 on the fixed seat end face 311 opposite to the corresponding mounting seat 6. Each slot on the corresponding end face 311 of the fixed seat 3 includes: a guardrail upright slot 91, a guardrail tilted slot 92, a guardrail flat slot 93, and a guardrail lowered slot 94. Each mounting seat 6 has a guide hole 61 that extends horizontally through the mounting seat 6, and a [missing information - likely a type of slot] is inserted through the guide hole 61 of each mounting seat 6. A locking pin 7 can be inserted into each slot. As the guardrail housing 1 rotates around the axis 4 relative to the fixed seat 3 of the stretcher 2 towards the outside of the stretcher 2, the locking pin 7 sequentially passes through the guardrail upright slot 91, the guardrail tilted slot 92, the guardrail flat slot 93, and the guardrail lowered slot 94 on the end face 311 of the corresponding fixed seat. A handle 8 is provided on the upper part of the guardrail housing 1. The locking pins 7 on the two mounting seats 6 are respectively connected to the left and right sides of the handle 8 through a linkage mechanism. At both ends on the right, each linkage mechanism is equipped with an elastic mechanism. This elastic mechanism allows the corresponding locking pin 7 connected to the corresponding linkage mechanism to be translated and inserted into the corresponding slot when the guardrail housing 1 rotates through the corresponding slot, so as to connect the guardrail housing to the fixed seat 3 in a corresponding flipped posture. The position of the guardrail upright position slot 91 ensures that when the locking pin 7 is inserted into the guardrail upright position slot 91, the guardrail housing 1 is in an upright posture relative to the fixed seat 3 and the stretcher 2. The guardrail tilt position slot 92... The positions ensure that when the locking pin 7 is inserted into the tilting slot 92 of the guardrail, the guardrail housing 1 is tilted relative to the fixed seat 3 and the stretcher 2. The position of the flat slot 93 of the guardrail ensures that when the locking pin 7 is inserted into the flat slot 93 of the guardrail, the guardrail housing 1 is flat relative to the fixed seat 3 and the stretcher 2. The position of the lowering slot 94 of the guardrail ensures that when the locking pin 7 is inserted into the lowering slot 94 of the guardrail, the guardrail housing 1 is lowered relative to the fixed seat 3 and the stretcher 2.
[0043] In this embodiment, the end face 311 of the fixed seat 3 located between the guardrail lowering slot 94 and the guardrail flat slot 93 is smoothly transitioned downward to the bottom surface 941 of the guardrail lowering slot 94 via the guide ramp 10. The advantage of this is that when the guardrail housing 1 needs to be adjusted from the lowering position to the flat position, medical staff do not need to operate the handle 8 to disengage the locking pin 7 from the guardrail lowering slot 94 to adjust the guardrail housing 1 from the lowering position to the flat position. In specific operation, medical staff only need to directly pull the guardrail housing 1 in the lowering position upward. During the upward rotation of the guardrail housing 1, the locking pin 7 will move upward along the corresponding guide ramp 10 to the corresponding fixed seat end face 311 to disengage from the corresponding guardrail lowering slot 94. When the locking pin 7 moves along the corresponding fixed seat end face 311 into the guardrail flat slot 93, the guardrail housing 1 is in the flat position, which is very convenient to operate.
[0044] In this embodiment, a handle receiving and guiding cavity 36 is provided inside the guardrail housing 1, which is composed of an upper limit plate 32, a lower limit plate 33, a left limit plate 34, a right limit plate 35, and the front and rear side walls of the guardrail housing 1. The handle 8 is disposed in the handle receiving and guiding cavity 36, and the handle 8 can only move upward or downward relative to the guardrail housing 1 along the handle receiving and guiding cavity 36. The side wall of the guardrail housing where the handle receiving and guiding cavity 36 is located is hollowed out to form an operating opening 37 for people to grip the handle 8. Two rods extending into the handle receiving cavity are provided on the upper limit plate 32. The positioning post 38 of the guide chamber 36 has two spring positioning grooves 39 at the handle end facing the upper limit plate 32. The two spring positioning grooves 39 correspond one-to-one with the two positioning posts 38. A return spring 40 is provided between each corresponding spring positioning groove 39 and the positioning post 38. One end of the return spring 40 is sleeved on the positioning post 38 and abuts upward against the upper limit plate 32, and the other end is inserted into the spring positioning groove 39. Each return spring 40 makes the handle 8 always have the tendency to move downward along the handle receiving guide chamber 36 and return to abutting the lower limit plate 33.
[0045] In this embodiment, the linkage mechanism includes: a first linkage 11, a first guide seat 12, a guide rod 13, a first connector 14, a second linkage 15, and a second connector 16.
[0046] One end of the connecting rod 11 is hinged to the handle 8 via a first pin 17, and the other end of the connecting rod 11 is provided with a first waist hole 18.
[0047] The guide seat 12 is located on one side of the handle 8 and above the fixed seat 3. The guide seat 12 is provided with a guide channel 19 running left and right. The guide rod 13 is movably inserted through the guide channel 19 of the guide seat 12. The end of the guide rod 13 near the handle is provided with a first through hole, which corresponds to the first waist hole 18 of the connecting rod 11. A first connecting bolt 20 is inserted in the corresponding first through hole and first waist hole 18. After the first connecting bolt 20 passes through the first through hole and first waist hole 18, it is threaded to a first connecting nut.
[0048] The far end of the guide rod 13 is fixed with a connector 14, and a second through hole is provided on the connector 14;
[0049] The middle part of the second connecting rod 15 is hinged to the guardrail housing 1 between the guide rod 13 and the corresponding locking pin 7 via the second pin 21. A second waist hole 22 is provided at the upper end of the second connecting rod 15. The second waist hole 22 corresponds to the second through hole of the first connector 14. A second connecting bolt 23 is passed through the corresponding second through hole and the second waist hole 22. After passing through the corresponding second through hole and the second waist hole 22, the second connecting bolt 23 is threaded to a second connecting nut. A third waist hole 24 is provided at the lower end of the second connecting rod 15.
[0050] The second connector 16 is fixed to the end of the locking pin 7 away from the corresponding fixed seat 3. A third through hole is provided on the second connector 16, which corresponds to the third waist hole 24 of the second connecting rod 15. A third connecting bolt 25 is inserted in the corresponding third through hole and third waist hole 24. After the third connecting bolt 25 passes through the corresponding third through hole and third waist hole 24, a third connecting nut is threadedly connected to it. Through the design of the above-mentioned linkage mechanism, the handle 8 can be moved up and down, and the locking pin can be moved left and right simultaneously, which makes the operation very convenient.
[0051] In this embodiment, the structure of the guide channel 19 in the guide seat 12 is as follows: an upper guide wheel group and a lower guide wheel group are arranged in a vertically opposite manner in the guide seat 12. The upper guide wheel group consists of several upper guide wheels 26 that are movably supported in the guide seat 1, and the lower guide wheel group consists of several lower guide wheels 27 that are movably supported in the guide seat 1. The gap between the upper guide wheel group and the lower guide wheel group forms the guide channel 19. This reduces the friction force on the guide rod 13 when it moves along the guide channel 19, effectively protects the guide rod 13, extends the service life of the guide rod 13, and thus extends the service life of the guardrail as a whole.
[0052] In this embodiment, the structure of the elastic mechanism includes: the guide hole 61 in the mounting base 6 through which the locking pin 7 passes is a stepped hole, the large diameter section of the stepped hole faces the corresponding fixed base 3, the outer diameter of the locking pin 7 forms a protruding shoulder 71, and a first spring 28 is sleeved on the outside of the locking pin 7, one end of the first spring 28 abuts against the shoulder 71 of the locking pin 7 and the other end abuts against the stepped surface 611 of the guide hole 61;
[0053] It also includes a second spring 29 and a second guide seat 30; the second guide seat 30 is fixedly installed on the guardrail housing 1 between the first guide seat 12 and the first connector 14. A stepped hole 31, running horizontally through the second guide seat 30 and corresponding to the guide channel 19 of the first guide seat 12, is provided in the second guide seat 30. The larger diameter section of the stepped hole 31 faces the first connector 14. The guide rod 13 passes through the guide channel 19 and the stepped hole 31 of the second guide seat 30 in sequence before being fixed to the first connector 14. A second spring 29 is sleeved on the guide rod 13 between the first connector 14 and the second guide seat 30. One end of the second spring 29 abuts against the first connector 14, and the other end abuts against the stepped surface 311 of the stepped hole 31 of the second guide seat 30. This utility model, through the design of the first spring 28 and the second spring 29... 1) Not only does it ensure that the corresponding locking pin 7 connected to the corresponding linkage mechanism always moves along the guide hole 61 of the mounting base 6 towards the corresponding fixed base 3 and is tightly pressed against the end face 311 of the corresponding fixed base, so that when the locking pin 7 rotates with the guardrail housing 1 through the corresponding slot, the locking pin 7 can be translated and inserted into the corresponding slot by the elastic force of the first spring 28 and the second spring 29 so as to connect the guardrail housing 1 to the fixed base 3 in the corresponding flipped posture; 2) Moreover, it ensures that the first connecting bolt 20 at the end of the guide rod 13 in the linkage mechanism is always in close contact with the end of the first waist hole 18 away from the handle, so as to ensure that when the handle 8 performs the unlocking action of moving upward relative to the guardrail housing 1, the handle 8 can drive the locking pin 7 to move in real time through the linkage 11 to disengage from the corresponding slot, thereby improving the stability of use;
[0054] In this embodiment, a tilting limiting mechanism is provided between the guardrail housing 1 and the fixing seat 3 to prevent the guardrail housing 1 from rotating excessively towards the inside of the stretcher trolley relative to the fixing seat 3 mounted on the stretcher trolley 2. Figure 9 , Figure 16 , Figure 17 , Figure 18As shown, the structure of the flipping limiting mechanism includes: a shaft 4 is fixedly installed on the guardrail housing 1 by several fixing bolts 43 so that the shaft 4 can rotate synchronously with the guardrail housing 1; an arc-shaped limiting groove 41 is provided circumferentially on the outer peripheral wall of the shaft 4 at the location of the fixing seat 3; a threaded hole 314 is provided on the side wall of the fixing seat 3, which extends to the hole 312; a limiting screw 42 is threadedly connected in the threaded hole 314; the limiting screw 42 extends into the arc-shaped limiting groove 41; the curved shape of the arc-shaped limiting groove 41 ensures that when the shaft 4 rotates upward relative to the fixing seat 3 with the guardrail housing 1 until one end of the groove wall of the arc-shaped limiting groove 41 abuts against the limiting screw 42, the guardrail housing 1 is in an upright position; and when the shaft 4 rotates downward relative to the fixing seat 3 with the guardrail housing 1 until the other end of the groove wall of the arc-shaped limiting groove 41 abuts against the limiting screw 42, the guardrail housing 1 is in a lowered position.
[0055] This utility model also protects a stretcher cart, such as Figure 19 As shown, the stretcher trolley 2 includes a stretcher trolley body 100, and multi-position tilting guardrails 200 are installed on the left and right sides of the stretcher trolley body 100 respectively.
[0056] During installation, the connecting parts 313 of the two fixing seats 3 are installed on the left and right sides of the stretcher body, thereby installing the guardrail on the stretcher.
[0057] When it is necessary to adjust the opening angle of the guardrail, medical staff can hold the handle 4 and press the handle 4 upward, so that the handle 4 moves upward relative to the guardrail housing 1. When the handle 4 moves upward, the two-side linkage mechanism simultaneously drives the two-side locking pins 7 to overcome the elastic force of each spring in the elastic mechanism and move away from the corresponding fixed seat 3 until it disengages from the corresponding slot. At this time, the guardrail can be flipped relative to the stretcher. Due to the limitation of the flipping limit mechanism, the guardrail cannot continue to rotate towards the inside of the stretcher after it is flipped to the upright position, so as to avoid the guardrail flipping towards the inside of the stretcher and injuring the patient lying on the stretcher.
[0058] When the guardrail is flipped relative to the stretcher trolley until the locking pin 7 is aligned with the upright slot 91 of the guardrail and the handle 8 is released, the locking pin 7 will be inserted into the upright slot 91 of the guardrail under the elastic force of the springs of the elastic mechanism, so that the guardrail is in an upright position relative to the stretcher trolley 2.
[0059] When the guardrail is flipped relative to the stretcher until the locking pin 7 is aligned with the inclined slot 92 of the guardrail and the handle 8 is released, the locking pin 7 will be inserted into the inclined slot 92 of the guardrail under the elastic force of the springs in the elastic mechanism, so that the guardrail is in an inclined position relative to the stretcher 2. In this position, the width of the stretcher is appropriately widened to suit the use of patients with larger body size.
[0060] When the guardrail is flipped relative to the stretcher until the locking pin 7 is aligned with the guardrail flat position slot 93 and the handle 8 is released, the locking pin 7 will be inserted into the guardrail flat position slot 93 under the elastic force of the springs in the elastic mechanism, so that the guardrail is in a flat position relative to the stretcher 2; in this position, the width of the stretcher is widened to the maximum extent to suit the use of patients with larger body size.
[0061] When the guardrail is flipped relative to the stretcher until the locking pin 7 is aligned with the guardrail lowering slot 94 and the handle 8 is released, the locking pin 7 will be inserted into the guardrail lowering slot 94 under the elastic force of the springs in the elastic mechanism, so that the guardrail is in a lowered position relative to the stretcher 2. The guardrail in this position will not obstruct the patient from getting onto the stretcher, making it more convenient for the patient to get onto the stretcher.
[0062] Furthermore, when it is necessary to adjust the guardrail housing 1 from the lowered position to the flat position, medical staff do not need to operate the handle 8 to disengage the locking pin 7 from the lowered position slot 94 to adjust the guardrail housing 1 from the lowered position to the flat position. Medical staff only need to directly pull the guardrail housing 1 in the lowered position upward. During the upward rotation of the guardrail housing 1, the locking pin 7 will move upward along the corresponding guide slope 10 to the corresponding fixed seat end face 311 to disengage from the corresponding lowered position slot 94. When the locking pin 7 moves along the corresponding fixed seat end face 311 into the flat position slot 93, the guardrail housing 1 is in the flat position, which is very convenient to operate.
[0063] The advantages of this utility model are: it is very convenient to operate and use, has high stability, and can adjust the opening and closing angle of the guardrail according to different patient body shapes, providing a comfortable rescue environment for patients.
[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.
Claims
1. A multi-position flip-up guardrail, characterized in that: The device includes a guardrail shell and two mounting seats for connecting and fixing to a stretcher. A left-right oriented shaft is installed at the lower end of the guardrail shell. The two mounting seats are respectively fitted onto the left and right ends of the shaft, allowing the guardrail shell to be hinged to the two mounting seats. A mounting base fixed to the guardrail shell is provided on one side of each mounting base. Several slots are arranged circumferentially around the shaft on the end face of each mounting base opposite to the corresponding mounting base. Each mounting base has a left-right through-hole, and a [missing information - likely a type of device] is inserted through the guide hole of each mounting base. A locking pin can be inserted into each slot, and as the guardrail housing rotates around the axis relative to the fixed seat of the stretcher towards the outside of the stretcher, the locking pin will pass through each slot on the end face of the corresponding fixed seat in sequence. A handle is provided on the upper part of the guardrail housing. The locking pins on the two mounting seats are respectively connected to the left and right ends of the handle through a set of linkage mechanisms. Each set of linkage mechanisms is provided with an elastic mechanism. The elastic mechanism enables the corresponding locking pin connected to the corresponding linkage mechanism to be translated and inserted into the corresponding slot when the guardrail housing rotates and passes through the corresponding slot, so as to connect the guardrail housing to the fixed seat in a corresponding flipped posture.
2. The multi-position flip-up guardrail according to claim 1, characterized in that: The linkage mechanism consists of: Link 1, Guide Seat 1, Guide Rod, Connector 1, Link 2, and Connector 2; One end of the connecting rod is hinged to the handle via a first pin, and the other end of the connecting rod has a first waist hole. The guide seat is located on one side of the handle and above the fixed seat. The guide seat has a guide channel running left and right. The guide rod is movably inserted through the guide channel of the guide seat. The end of the guide rod near the handle has a first through hole, which corresponds to the first waist hole of the connecting rod. A first connecting bolt is inserted in the corresponding first through hole and first waist hole. After the first connecting bolt passes through the first through hole and first waist hole, a first connecting nut is threaded onto it. A connector is fixed to the far end of the guide rod, and a second through hole is provided on the connector. The middle part of the second connecting rod is hinged to the guardrail housing between the guide rod and the corresponding locking pin via a second pin. A second waist hole is provided at the upper end of the second connecting rod, which corresponds to the second through hole of the first connecting head. A second connecting bolt is inserted in the corresponding second through hole and the second waist hole. After the second connecting bolt passes through the corresponding second through hole and the second waist hole, a second connecting nut is threaded onto it. A third waist hole is provided at the lower end of the second connecting rod. The second connector is fixed to the end of the locking pin away from the corresponding fixed seat. A third through hole is provided on the second connector, which corresponds to the third waist hole of the second connecting rod. A third connecting bolt is passed through the corresponding third through hole and the third waist hole. After the third connecting bolt passes through the corresponding third through hole and the third waist hole, a third connecting nut is threadedly connected to it.
3. The multi-position flip-up guardrail according to claim 2, characterized in that: The structure of the guide channel in the guide seat is as follows: an upper guide wheel group and a lower guide wheel group are arranged in a vertically opposite manner in the guide seat, and the gap between the upper guide wheel group and the lower guide wheel group forms a guide channel.
4. The multi-position flip-up guardrail according to claim 1, characterized in that: The structure of the elastic mechanism includes: a stepped hole in the mounting base through which the locking pin passes, the larger diameter section of which faces the corresponding fixed base; a protruding shoulder formed by the outer diameter change of the locking pin; and a first spring sleeved on the outside of the locking pin, one end of which abuts against the shoulder of the locking pin and the other end against the stepped surface of the guide hole.
5. The multi-position flip-up guardrail according to claim 4, characterized in that: It also includes a second spring and a second guide seat; the second guide seat is fixedly installed on the guardrail housing between the first guide seat and the first connector. The second guide seat has a stepped hole that runs through the second guide seat in the left and right direction and corresponds to the guide channel of the first guide seat. The large diameter section of the stepped hole faces the first connector. The guide rod passes through the guide channel and the stepped hole of the second guide seat in sequence and is then fixed to the first connector. The second spring is sleeved on the guide rod between the first connector and the second guide seat. One end of the second spring abuts against the first connector and the other end abuts against the stepped surface of the stepped hole of the second guide seat.
6. The multi-position flip-up guardrail according to claim 1, characterized in that: Each mounting bracket has slots on its corresponding end face, including: an upright slot, a tilted slot, a horizontal slot, and a lowered slot. As the guardrail housing rotates around its axis relative to the mounting bracket on the stretcher trolley towards the outside of the stretcher trolley, the locking pin corresponding to the mounting bracket will sequentially pass through the upright, tilted, horizontal, and lowered slots on the end face of the corresponding mounting bracket. The position of the upright slot ensures that when the locking pin is inserted into the upright slot, the guardrail housing remains upright relative to the mounting bracket and the stretcher trolley; the tilted slot... The positions ensure that when the locking pin is inserted into the inclined slot of the guardrail, the guardrail shell is in an inclined position relative to the fixed seat and the stretcher; the positions of the flat slot of the guardrail ensure that when the locking pin is inserted into the flat slot of the guardrail, the guardrail shell is in a flat position relative to the fixed seat and the stretcher; the positions of the lowering slot of the guardrail ensure that when the locking pin is inserted into the lowering slot of the guardrail, the guardrail shell is in a lowering position relative to the fixed seat and the stretcher; the end face of the fixed seat located between the lowering slot and the flat slot of the guardrail in each fixed seat smoothly transitions downward to the bottom surface of the lowering slot of the guardrail via a guide slope.
7. The multi-position flip-up guardrail according to claim 1, characterized in that: The guardrail housing contains a handle receiving and guiding chamber, which is composed of an upper limit plate, a lower limit plate, a left limit plate, a right limit plate, and the front and rear side walls of the guardrail housing. The handle is located in the handle receiving and guiding chamber. The side wall of the guardrail housing containing the handle receiving and guiding chamber is hollowed out to form an operating opening for easy gripping of the handle. Two positioning posts are provided on the upper limit plate, which extend into the handle receiving and guiding chamber. Two spring positioning grooves are provided on the handle end facing the upper limit plate. The two spring positioning grooves correspond one-to-one with the two positioning posts. A return spring is provided between each corresponding spring positioning groove and positioning post. One end of the return spring is sleeved on the positioning post and abuts upward against the upper limit plate, and the other end is inserted into the spring positioning groove. Each return spring ensures that the handle always has the tendency to move downward along the handle receiving and guiding chamber and return to abutting the lower limit plate.
8. The multi-position flip-up guardrail according to claim 1, characterized in that: On the left and right sides of each fixed seat, there is a retaining ring that is fixedly installed on the shaft. Each retaining ring limits the axial position of the fixed seat on the shaft so that the fixed seat can rotate relative to the shaft but cannot move along the shaft.
9. The multi-position flip-up guardrail according to claim 1, characterized in that: A tilting limiting mechanism is provided between the guardrail housing and the fixed seat to prevent the guardrail housing from rotating excessively towards the inside of the stretcher trolley relative to the fixed seat. The tilting limiting mechanism includes: a shaft fixedly installed on the guardrail housing so that the shaft can rotate synchronously with the guardrail housing; an arc-shaped limiting groove is provided circumferentially on the outer peripheral wall of the shaft at the location of the fixed seat; a limiting screw is provided on the fixed seat, and the limiting screw extends into the arc-shaped limiting groove. The curve shape of the arc-shaped limiting groove ensures that when the shaft rotates upward with the guardrail housing relative to the fixed seat until one end of the arc-shaped limiting groove abuts against the limiting screw, the guardrail housing is in an upright position; and when the shaft rotates downward with the guardrail housing relative to the fixed seat until the other end of the arc-shaped limiting groove abuts against the limiting screw, the guardrail housing is in a lowered position.
10. A stretcher cart, characterized in that: The device includes a stretcher trolley body, and multi-position tilting guardrails are installed on the left and right sides of the stretcher trolley body, wherein the multi-position tilting guardrails are the multi-position tilting guardrails as described in any one of claims 1 to 9.