Multi-gear turnover guardrail and wheel stretcher
By designing a multi-speed flip guardrail, the shaft, fixed seat, connecting rod mechanism and elastic mechanism are used to achieve multiple posture adjustments of the guardrail, which solves the problem that the existing stretcher truck guardrail cannot be adjusted and improves the stability and comfort of use.
Patent Information
- Application Number
- CN202510307691.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-06-27
AI Technical Summary
The guardrail of the existing stretcher truck cannot adjust the opening and closing angle, which cannot meet the transportation needs of patients with larger body widths, affecting the rescue effect.
A multi-speed flip guardrail is designed. By installing a shaft and a fixed seat at the lower end of the guardrail shell, combining the connecting rod mechanism and the elastic mechanism, a variety of flip postures of the guardrail shell are realized to meet the needs of different patients' body types.
It realizes multiple posture adjustments of the guardrail, which is convenient for operation, improves the stability of use, and can adjust the opening and closing angle of the guardrail according to the body shape of different patients, providing patients with a comfortable rescue environment.
Smart Images
Figure CN120203946A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and particularly to a multi-gear flip guardrail and a stretcher trolley. Background Art
[0002] Medical stretchers are commonly used medical devices that facilitate medical first aid diagnosis and rescue. Currently, most of the guardrails of stretchers in use are fixed type. The fixed guardrails cannot adjust the opening and closing angles, cannot meet the transfer needs of patients with a larger body width, cannot provide a good rescue environment for patients during the rescue process, are inconvenient to use, and affect the rescue effect. Summary of the Invention
[0003] The first object of the present invention is to provide a multi-gear flip guardrail that is convenient to operate and use.
[0004] To achieve the above object, the present invention adopts the following technical solution: A multi-gear flip guardrail includes a guardrail housing and two fixed seats for connecting and fixing to a stretcher trolley. A horizontally extending shaft is installed at the lower end of the guardrail housing. The two fixed seats are respectively sleeved on the left and right ends of the shaft, so that the guardrail housing is hinged to the two fixed seats through the shaft. A mounting seat fixed to the guardrail housing is respectively provided on one side of each fixed seat. A number of notches are sequentially arranged at intervals along the circumferential direction around the shaft on the end face of the fixed seat opposite to the corresponding mounting seat in each fixed seat. A guide hole penetrating the mounting seat in the left-right direction is provided in each mounting seat. A locking pin that can be inserted into each notch is respectively inserted into the guide hole of each mounting seat. And this locking pin will sequentially pass through the notches on the end face of the corresponding fixed seat as the guardrail housing rotates relative to the fixed seat mounted on the stretcher trolley around the shaft and turns to the outside of the stretcher trolley. A handle is provided at 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 link mechanisms. An elastic mechanism is respectively provided on each set of link mechanisms. The elastic mechanism can make the corresponding locking pin connected to the corresponding link mechanism translate and insert into the corresponding notch when rotating through the corresponding notch along with the guardrail housing, so as to connect the guardrail housing to the fixed seat in a corresponding flipped posture.
[0005] Further, in the foregoing multi-gear flip guardrail: The structure of the link mechanism includes: link one, guide seat one, guide rod, connection head one, link two, connection head two; One end of the link one is hinged to the handle through a first pin shaft, and a first waist hole is provided at the other end of the link one. The first guide seat is located on one side of the handle and above the fixed seat. A guide channel running left and right is provided in the first guide seat. The guide rod is movably inserted into the guide channel of the first guide seat. A first through hole is provided at the handle - proximal end of the guide rod, and the first through hole corresponds to the first waist - shaped hole of the first connecting rod. A first connecting bolt is inserted through the corresponding first through hole and first waist - shaped hole, and after passing through the first through hole and the first waist - shaped hole, the first connecting bolt is threadedly connected with a first connecting nut. A first connecting head is fixed to the handle - distal end of the guide rod, and a second through hole is provided on the first connecting head. The middle part of the second connecting rod is hinged to the guardrail housing between the guide rod and the corresponding locking pin through a second pin shaft. A second waist - shaped hole is provided at the upper end of the second connecting rod, and the second waist - shaped hole corresponds to the second through hole of the first connecting head. A second connecting bolt is inserted through the corresponding second through hole and second waist - shaped hole, and after passing through the corresponding second through hole and second waist - shaped hole, the second connecting bolt is threadedly connected with a second connecting nut. A third waist - shaped hole is provided at the lower end of the second connecting rod. The second connecting head is fixed to the end of the locking pin away from the corresponding fixed seat. A third through hole is provided on the second connecting head, and the third through hole corresponds to the third waist - shaped hole of the second connecting rod. A third connecting bolt is inserted through the corresponding third through hole and third waist - shaped hole, and after passing through the corresponding third through hole and third waist - shaped hole, the third connecting bolt is threadedly connected with a third connecting nut.
[0006] Further, in the multi - gear flip - up guardrail described above: The structure of the guide channel in the first guide seat is as follows: An upper guide wheel group and a lower guide wheel group arranged vertically relative to each other are provided in the first guide seat. A guide channel is formed by the gap between the upper guide wheel group and the lower guide wheel group.
[0007] Further, in the multi - gear flip - up guardrail described above: The structure of the elastic mechanism includes: The guide hole in the mounting seat for the locking pin to pass through is a stepped hole, and the large - diameter section of the stepped hole faces the corresponding fixed seat. The outer diameter of the locking pin is changed to form a protruding shoulder. A first spring is sleeved on the outer part 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 step surface of the guide hole.
[0008] Further, in the multi - gear flip - up guardrail described above: It further 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 connecting head. A stepped hole running left and right through the second guide seat and corresponding to the guide channel of the first guide seat is provided in the second guide seat. The large - diameter section of the stepped hole faces the first connecting head. The guide rod passes through the guide channel and the stepped hole of the second guide seat in sequence and then is fixed to the first connecting head. A second spring is sleeved on the guide rod between the first connecting head and the second guide seat. One end of the second spring abuts against the first connecting head, and the other end abuts against the step surface of the stepped hole of the second guide seat.
[0009] Further, for the multi-gear flipping guardrail described above, each notch on the corresponding end face of each fixed seat includes: a guardrail upright position notch, a guardrail inclined position notch, a guardrail flat position notch, and a guardrail lowered position notch. The locking pin corresponding to the fixed seat will sequentially pass through the guardrail upright position notch, the guardrail inclined position notch, the guardrail flat position notch, and the guardrail lowered position notch on the end face of the corresponding fixed seat as the guardrail housing rotates relative to the fixed seat on the stretcher cart about the axis and turns outward of the stretcher cart. The position of the guardrail upright position notch can ensure that when the locking pin is inserted into the guardrail upright position notch, the guardrail housing is in an upright posture relative to the fixed seat and the stretcher cart. The position of the guardrail inclined position notch can ensure that when the locking pin is inserted into the guardrail inclined position notch, the guardrail housing is in an inclined posture relative to the fixed seat and the stretcher cart. The position of the guardrail flat position notch can ensure that when the locking pin is inserted into the guardrail flat position notch, the guardrail housing is in a flat posture relative to the fixed seat and the stretcher cart. The position of the guardrail lowered position notch can ensure that when the locking pin is inserted into the guardrail lowered position notch, the guardrail housing is in a lowered posture relative to the fixed seat and the stretcher cart. The end face of each fixed seat located between the guardrail lowered position notch and the guardrail flat position notch smoothly transitions downward to the bottom surface of the guardrail lowered position notch through a guiding inclined surface.
[0010] Further, for the multi-gear flipping guardrail described above, a handle accommodation guiding chamber is formed in the guardrail housing by an upper limiting plate, a lower limiting plate, a left limiting plate, a right limiting plate, and the front and rear side walls of the guardrail housing. The handle is arranged in the handle accommodation guiding chamber. The side wall of the guardrail housing where the handle accommodation guiding chamber is located is hollowed out to form an operation opening for people to hold the handle conveniently. Two positioning posts extending into the handle accommodation guiding chamber are arranged on the upper limiting plate. Two spring positioning grooves are arranged at the end of the handle facing the upper limiting plate. The two spring positioning grooves correspond to the two positioning posts one by one. A return spring is arranged between each corresponding spring positioning groove and positioning post. One end of the return spring is sleeved on the positioning post and abuts against the upper limiting plate upward, and the other end is inserted into the spring positioning groove. Each return spring makes the handle always have a tendency to move downward along the handle accommodation guiding chamber and reset to abut against the lower limiting plate.
[0011] Further, for the multi-gear flipping guardrail described above, an axial retaining ring fixedly installed on the shaft is arranged on each of the left and right sides of each fixed seat. Each axial retaining ring limits the axial position of the fixed seat on the shaft, so that the fixed seat can rotate relative to the shaft and cannot move along the shaft.
[0012] Furthermore, for the above-mentioned multi-gear flip guardrail, specifically: a flip limit mechanism is provided between the guardrail housing and the fixed seat to prevent the guardrail housing from rotating excessively inward relative to the fixed seat mounted on the stretcher trolley; the structure of the flip limit mechanism includes: a shaft fixedly installed on the guardrail housing so that the shaft can rotate synchronously with the guardrail housing, an arc-shaped limit groove is circumferentially provided on the outer peripheral wall of the shaft at the position of the fixed seat, a limit screw is provided on the fixed seat, the limit screw extends into the arc-shaped limit groove, and the curve shape of the arc-shaped limit groove can ensure that when the shaft rotates upward relative to the fixed seat with the guardrail housing until one end wall of the arc-shaped limit groove abuts against the limit screw, the guardrail housing is exactly in the upright posture, and when the shaft rotates downward relative to the fixed seat with the guardrail housing until the other end wall of the arc-shaped limit groove abuts against the limit screw, the guardrail housing is exactly in the lowered posture.
[0013] The second object of the present invention is to provide a stretcher trolley that is convenient to operate and use.
[0014] To achieve the above object, the present invention adopts the following technical solution: a stretcher trolley includes a stretcher trolley main body, and multi-gear flip guardrails are respectively installed on the left and right sides of the stretcher trolley main body.
[0015] By implementing the above technical solution, the beneficial effects of the present invention are: it is very convenient to operate and use, has high use stability, can adjust the opening and closing angle of the guardrail according to the body types of different patients, and provides a comfortable rescue environment for patients. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic structural diagram of a multi-gear flip guardrail described in the present invention.
[0017] Figure 2 For Figure 1 It is a schematic structural diagram of the A-A cross-section shown in
[0018] Figure 3 For Figure 2 It is an enlarged schematic diagram of part B shown in
[0019] Figure 4 For Figure 2 It is an enlarged schematic diagram of part C shown in
[0020] Figure 5 For Figure 2 It is an enlarged schematic diagram of part D shown in
[0021] Figure 6 For Figure 5 It is a schematic structural diagram after hiding link one, guide rod, connection head one, link two, connection head two and lock pin in
[0022] Figure 7 It is a schematic structural diagram of the lock pin.
[0023] Figure 8 is the right view of Figure 1 .
[0024] Figure 9 is the schematic diagram of the mating relationship between the limit screw and the arc-shaped limit groove of the shaft in the E-E section shown in Figure 8 .
[0025] Figure 10 is the schematic diagram of the state when the guardrail housing is flipped outward relative to the fixed seat installed on the stretcher trolley to the upright position.
[0026] Figure 11 is the schematic diagram of the state when the guardrail housing is flipped outward relative to the fixed seat installed on the stretcher trolley to the flat position.
[0027] Figure 12 is the schematic diagram of the state when the guardrail housing is flipped outward relative to the fixed seat installed on the stretcher trolley to the lowered position.
[0028] Figure 13 is the schematic diagram of the structure of the fixed seat.
[0029] Figure 14 is Figure 13 the schematic diagram of the structure in the left view direction.
[0030] Figure 15 is the perspective view of the fixed seat.
[0031] Figure 16 is the schematic diagram of the structure of the shaft.
[0032] Figure 17 is Figure 16 the schematic diagram of the structure of the F-F section shown in
[0033] Figure 18 is the perspective view of the shaft.
[0034] Figure 19 is the schematic diagram of the structure of the stretcher trolley. Specific Embodiments
[0035] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0036] As shown in 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-gear flipping guardrail 200 includes a guardrail housing 1 and two fixing seats 3 used to be fixedly connected to the stretcher 2. A shaft 4 running left and right 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 used to be fixedly connected to the stretcher at the lower part. The two fixing seats 3 are respectively movably sleeved on the left and right ends of the shaft 4 through the corresponding holes 312. An axial retaining ring 5 fixedly installed on the shaft 4 is respectively arranged on the left and right sides of each fixing seat 3. Each axial 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 and 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; An installation seat 6 fixed to the guardrail housing 1 is respectively arranged corresponding to the outside of each fixing seat 3. As Figure 13 , Figure 14 , Figure 15 shown, a plurality of notches are sequentially arranged at intervals along the circumferential direction around the shaft 4 on the fixing seat end face 311 of each fixing seat 3 corresponding to the corresponding installation seat 6. The notches on the corresponding end face 311 of each fixing seat 3 all include: a guardrail upright position notch 91, a guardrail inclined position notch 92, a guardrail flat position notch 93 and a guardrail lowered position notch 94; A guide hole 61 running through the installation seat 6 left and right is arranged in each installation seat 6. A locking pin 7 that can be inserted into each notch is respectively inserted into the guide hole 61 of each installation seat 6. And this locking pin 7 will sequentially pass through the guardrail upright position notch 91, the guardrail inclined position notch 92, the guardrail flat position notch 93 and the guardrail lowered position notch 94 of the corresponding fixing seat end face 311 as the guardrail housing 1 rotates relative to the fixing seat 3 installed on the stretcher 2 around the shaft 4 and turns to the outside of the stretcher 2. A handle 8 is arranged at the upper part of the guardrail housing 1. The locking pins 7 on the two installation seats 6 are respectively connected to the left and right ends of the handle 8 through a set of link mechanisms. An elastic mechanism is respectively arranged on each set of link mechanisms. This elastic mechanism can make the corresponding locking pin 7 connected by the corresponding link mechanism translate and insert into the corresponding notch when rotating through the corresponding notch along with the guardrail housing 1 to connect the guardrail housing to the fixing seat 3 in the corresponding flipping posture; The position of the guardrail upright position notch 91 can ensure that the guardrail housing 1 is in an upright posture relative to the fixing seat 3 and the stretcher 2 after the locking pin 7 is inserted into the guardrail upright position notch 91. The position of the guardrail inclined position notch 92 can ensure that the guardrail housing 1 is in an inclined posture relative to the fixing seat 3 and the stretcher 2 after the locking pin 7 is inserted into the guardrail inclined position notch 92. The position of the guardrail flat position notch 93 can ensure that the guardrail housing 1 is in a flat posture relative to the fixing seat 3 and the stretcher 2 after the locking pin 7 is inserted into the guardrail flat position notch 93. The position of the guardrail lowered position notch 94 can ensure that the guardrail housing 1 is in a lowered posture relative to the fixing seat 3 and the stretcher 2 after the locking pin 7 is inserted into the guardrail lowered position notch 94; In this embodiment, the end face 311 of each fixed seat 3 between the guardrail lowering position notch 94 and the guardrail flat-laying position notch 93 is smoothly transitioned downward to the bottom surface 941 of the guardrail lowering position notch 94 through the guiding inclined surface 10. The advantage of this is that when it is necessary to adjust the guardrail housing 1 from the lowered posture to the flat-laying posture, the medical staff can adjust the guardrail housing 1 from the lowered posture to the flat-laying posture without operating the handle 8 to disengage the locking pin 7 from the guardrail lowering position notch 94. During specific operation, the medical staff only needs to directly pull up the guardrail housing 1 in the lowered posture. During the upward rotation of the guardrail housing 1, the locking pin 7 will move upward along the corresponding guiding inclined surface 10 to the corresponding fixed seat end face 311 to disengage from the corresponding guardrail lowering position notch 94. When the locking pin 7 moves along the corresponding fixed seat end face 311 and enters the guardrail flat-laying position notch 93, at this time, the guardrail housing 1 is in the flat-laying posture, and the operation is very convenient; In this embodiment, a handle accommodating and guiding chamber 36 is provided inside the guardrail housing 1, which is jointly formed by the upper limiting plate 32, the lower limiting plate 33, the left limiting plate 34, the right limiting plate 35 and the front and rear side walls of the guardrail housing 1. The handle 8 is arranged inside the handle accommodating and guiding chamber 36. The handle 8 can only move upward or downward relative to the guardrail housing 1 along the handle accommodating and guiding chamber 36. The side wall of the guardrail housing where the handle accommodating and guiding chamber 36 is located is hollowed out to form an operation opening 37 for people to hold the handle 8 conveniently. Two positioning posts 38 extending into the handle accommodating and guiding chamber 36 are provided on the upper limiting plate 32. Two spring positioning grooves 39 are provided at the handle end facing the upper limiting plate 32. The two spring positioning grooves 39 correspond to the two positioning posts 38 one by one. A return spring 40 is arranged between each corresponding spring positioning groove 39 and positioning post 38. One end of the return spring 40 is sleeved on the positioning post 38 and abuts against the upper limiting plate 32 upward, and the other end is inserted into the spring positioning groove 39. Each return spring 40 makes the handle 8 always have a tendency to move downward along the handle accommodating and guiding chamber 36 and reset to abut against the lower limiting plate 33; In this embodiment, the structure of the link mechanism includes: link one 11, guide seat one 12, guide rod 13, connecting head one 14, link two 15, connecting head two 16; One end of the link one 11 is hinged to the handle 8 through the first pin shaft 17, and a first waist-shaped hole 18 is provided at the other end of the link one 11; The guide seat one 12 is located on one side of the handle 8 and above the fixed seat 3. A guiding channel 19 running left and right is provided in the guide seat one 12. The guide rod 13 is movably inserted through the guiding channel 19 of the guide seat one 12. A first through hole is provided at the near handle end of the guide rod 13, and the first through hole corresponds to the first waist-shaped hole 18 of the link one 11. A first connecting bolt 20 is inserted through the corresponding first through hole and first waist-shaped hole 18, and the first connecting bolt 20 is threadedly connected with a first connecting nut after passing through the first through hole and first waist-shaped hole 18; A connector one 14 is fixed to the far handle end of the guide rod 13, and a second through hole is provided in the connector one 14; 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 through a second pin shaft 21. A second waist-shaped hole 22 is provided at the upper end of the second connecting rod 15, and the second waist-shaped hole 22 corresponds to the second through hole of the connector one 14. A second connecting bolt 23 is inserted through the corresponding second through hole and the second waist-shaped hole 22, and a second connecting nut is threadedly connected after the second connecting bolt 23 passes through the corresponding second through hole and the second waist-shaped hole 22; A third waist-shaped hole 24 is provided at the lower end of the second connecting rod 15; The connector two 16 is fixed to the locking pin end of the locking pin 7 away from the corresponding fixed seat 3. A third through hole is provided in the connector two 16, and the third through hole corresponds to the third waist-shaped hole 24 of the second connecting rod 15. A third connecting bolt 25 is inserted through the corresponding third through hole and the third waist-shaped hole 24, and a third connecting nut is threadedly connected after the third connecting bolt 25 passes through the corresponding third through hole and the third waist-shaped hole 24; Through the design of the above connecting rod mechanism, it can be realized that when the handle 8 moves in the up and down directions, the locking pin can be synchronously driven to translate in the left and right directions, and the operation is very convenient; In this embodiment, the structure of the guide channel 19 in the guide seat one 12 is: an upper guide wheel group and a lower guide wheel group are arranged up and down relatively in the guide seat one 12. The upper guide wheel group is composed of a plurality of upper guide wheels 26 movably supported in the guide seat one, and the lower guide wheel group is composed of a plurality of lower guide wheels 27 movably supported in the guide seat one. A gap is formed between the upper guide wheel group and the lower guide wheel group to form the guide channel 19, which reduces the friction force when the guide rod 13 moves along the guide channel 19, effectively protects the guide rod 13, extends the service life of the guide rod 13, and further extends the service life of the entire guardrail; In this embodiment, the structure of the elastic mechanism includes: the guide hole 61 in the mounting seat 6 for the locking pin 7 to pass through is a stepped hole, and the large-diameter section of the stepped hole faces the corresponding fixed seat 3. The outer diameter of the locking pin 7 is changed to form a protruding shoulder 71. A first spring 28 is sleeved outside 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 step surface 611 of the guide hole 61; It further 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 that penetrates the second guide seat 30 in the left-right direction and corresponds to the guide channel 19 of the first guide seat 12 is provided in the second guide seat 30. The large-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 and then is 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 step surface 311 of the stepped hole 31 of the second guide seat 30. Through the design of the first spring 28 and the second spring 29, 1) not only can the corresponding lock pin 7 connected by the corresponding link mechanism always move along the guide hole 61 of the mounting seat 6 towards the corresponding fixed seat 3 and tightly abut against the end face 311 of the corresponding fixed seat, so that when the lock pin 7 rotates with the guardrail housing 1 through the corresponding notch, the lock pin 7 can be translated and inserted into the corresponding notch it passes through under the elastic force of the first spring 28 and the second spring 29 to connect the guardrail housing 1 to the fixed seat 3 in a corresponding flipped posture; 2) moreover, it can make the first connecting bolt 20 at the end of the guide rod 13 in the link mechanism always tightly contact the end of the first waist-shaped hole 18 away from the handle in the first waist-shaped hole 18, so as to ensure that when the handle 8 makes an unlocking action of moving upward relative to the guardrail housing 1, the handle 8 can drive the lock pin 7 to act in real time and synchronously through the first link 11 to disengage from the corresponding notch, thereby improving the use stability; In this embodiment, a flipping limit mechanism is provided between the guardrail housing 1 and the fixed seat 3 to prevent the guardrail housing 1 from rotating excessively towards the inside of the stretcher relative to the fixed seat 3 mounted on the stretcher 2, such as Figure 9 , Figure 16 , Figure 17 , Figure 18 shown. The structure of the flipping limit mechanism includes: the shaft 4 is fixedly installed on the guardrail housing 1 through a plurality of fixing bolts 43 so that the shaft 4 can rotate synchronously with the guardrail housing 1. An arc-shaped limit groove 41 is provided on the outer peripheral wall of the shaft 4 at the position of the fixed seat 3 along the circumferential direction. A threaded hole 314 that penetrates to the hole 312 is provided on the side wall of the fixed seat 3. A limit screw 42 is threadedly connected in the threaded hole 314, and the limit screw 42 extends into the arc-shaped limit groove 41. The curve shape of the arc-shaped limit groove 41 can ensure that when the shaft 4 rotates upward relative to the fixed seat 3 with the guardrail housing 1 until one end wall of the arc-shaped limit groove 41 abuts against the limit screw 42, the guardrail housing 1 is exactly in the upright posture, and when the shaft 4 rotates downward relative to the fixed seat 3 with the guardrail housing 1 until the other end wall of the arc-shaped limit groove 41 abuts against the limit screw 42, the guardrail housing 1 is exactly in the lowered posture; The present invention also protects a stretcher, such as Figure 19As shown, the stretcher trolley 2 includes a stretcher trolley body 100 , and a multi-position flip guardrail 200 is respectively installed on the left and right sides of the stretcher trolley body 100 .
[0037] During installation, the connecting parts 313 of the two fixing seats 3 are installed on the left and right sides of the stretcher body, so that the guardrail is installed on the stretcher.
[0038] When the opening and closing angle of the guardrail needs to be adjusted, the medical staff can hold the handle 4 and press the handle 4 upward to move the handle 4 upward relative to the guardrail shell 1. When the handle 4 moves upward, the locking pins 7 on both sides are synchronously driven by the connecting rod mechanisms on both sides, and at the same time, the elastic force of each spring in the elastic mechanism is overcome to move in the direction away from the corresponding fixing seat 3 until it is out of the corresponding notch. At this time, the guardrail can be flipped relative to the stretcher, and due to the limitation of the flipping limit mechanism, the guardrail cannot continue to rotate toward the inside of the stretcher after flipping to the upright posture, so as to avoid the guardrail flipping toward the inside of the stretcher and injuring the patient lying on the stretcher; When the guardrail is flipped relative to the stretcher trolley until the locking pin 7 faces the guardrail upright position slot 91 and the handle 8 is released, the locking pin 7 will be inserted into the guardrail upright position slot 91 under the elastic force of each spring of the elastic mechanism, so that the guardrail is in an upright position relative to the stretcher trolley 2; When the guardrail is flipped relative to the stretcher 2 until the locking pin 7 faces the guardrail tilting slot 92 and the handle 8 is released, the locking pin 7 is inserted into the guardrail tilting slot 92 under the elastic force of the springs of the elastic mechanism, so that the guardrail is in a tilted position relative to the stretcher 2; in this position, the width of the stretcher is appropriately widened to be suitable for fat patients; When the guardrail is flipped relative to the stretcher 2 until the locking pin 7 faces the guardrail flat position slot 93 and the handle 8 is released, the locking pin 7 is inserted into the guardrail flat position slot 93 under the elastic force of the springs of 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 be suitable for fat patients; When the guardrail is flipped relative to the stretcher trolley until the locking pin 7 faces 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 of the elastic mechanism, so that the guardrail is in a lowered position relative to the stretcher trolley 2. The guardrail in this position will not hinder the patient from getting on the stretcher trolley, making it more convenient for the patient to get on the stretcher trolley; And when it is necessary to adjust the guardrail housing 1 from the lowered posture to the flat posture, medical staff can adjust the guardrail housing 1 from the lowered posture to the flat posture without operating the handle 8 to disengage the locking pin 7 from the guardrail lowered position notch 94. The medical staff only needs to directly lift the guardrail housing 1 in the lowered posture upward. During the upward rotation of the guardrail housing 1, the locking pin 7 will move upward along the corresponding guiding inclined surface 10 to the corresponding fixed seat end face 311 to disengage from the corresponding guardrail lowered position notch 94. When the locking pin 7 moves along the corresponding fixed seat end face 311 and enters the guardrail flat position notch 93, at this time the guardrail housing 1 is in the flat posture, and the operation is very convenient.
[0039] The advantages of the present invention are: very convenient to operate and use, high stability in use, can adjust the opening and closing angle of the guardrail according to the body types of different patients, and provide a comfortable rescue environment for patients.
[0040] The above are only the preferred embodiments of the present invention, and do not limit the present invention in any other form. Any modification or equivalent change made according to the technical essence of the present invention still belongs to the scope protected by the present invention.
Claims
1. A multi-position rollover guardrail, characterized in that: The utility model comprises a guardrail shell, two fixing seats for connecting and fixing with a stretcher, a left-right axis is installed at the lower end of the guardrail shell, and the two fixing seats are respectively sleeved on the left and right ends of the axis, so that the guardrail shell is connected to the two fixing seats through the axis hinge; a mounting seat fixed to the guardrail shell is respectively arranged on one side of each fixing seat, and a plurality of notches are sequentially arranged around the axis along the circumferential direction on the end surface of the fixing seat opposite to the corresponding mounting seat in each fixing seat; a guide hole is arranged in each mounting seat, which passes through the mounting seat in the left and right directions, and a guide hole is respectively penetrated in the guide hole of each mounting seat A locking pin can be inserted into each slot, and the locking pin will pass through the slots on the end face of the corresponding fixing seat in sequence as the guardrail shell rotates around the axis relative to the fixing seat installed on the stretcher car toward the outside of the stretcher car. A handle is arranged on the upper part of the guardrail shell, and the locking pins on the two mounting seats are respectively connected to the left and right ends of the handle through a set of connecting rod mechanisms. An elastic mechanism is respectively arranged on each set of connecting rod mechanisms. The elastic mechanism can enable the corresponding locking pin connected to the corresponding connecting rod mechanism to be translated and inserted into the corresponding slot when the guardrail shell rotates and passes through the corresponding slot, so as to connect the guardrail shell to the fixing seat in a corresponding flipping posture.
2. The multi-position rollover guardrail according to claim 1, characterized in that: The structure of the connecting rod mechanism includes: connecting rod 1, guide seat 1, guide rod, connecting head 1, connecting rod 2, connecting head 2; One end of the connecting rod 1 is hinged to the handle through a first pin shaft, and the other end of the connecting rod 1 is provided with a first waist hole. The guide seat 1 is located on one side of the handle and above the fixed seat. A left-right guide channel is provided in the guide seat 1. The guide rod is movably provided in the guide channel of the guide seat 1. A first through hole is provided at the end of the guide rod near the handle. The first through hole corresponds to the first waist hole of the connecting rod 1. A first connecting bolt is provided in the corresponding first through hole and the first waist hole. The first connecting bolt passes through the first through hole and the first waist hole and is threadedly connected with a first connecting nut. A connector 1 is fixed to the distal end of the guide rod, and a second through hole is provided on the connector 1; The middle part of the second connecting rod is hinged to the guardrail housing between the guide rod and the corresponding locking pin through a second pin shaft, a second waist hole is provided at the upper end of the second connecting rod, the second waist hole corresponds to the second through hole of the connector 1, a second connecting bolt is passed through the corresponding second through hole and the second waist hole, and the second connecting bolt is threadedly connected with a second connecting nut after passing through the corresponding second through hole and the second waist hole; a third waist hole is provided at the lower end of the second connecting rod; The second connecting head is fixed to the end of the locking pin in the locking pin away from the corresponding fixing seat. A third through hole is arranged on the second connecting head, and the third through hole 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, and the third connecting bolt is threadedly connected with a third connecting nut after passing through the corresponding third through hole and the third waist hole.
3. The multi-position rollover guardrail according to claim 2, characterized in that: The structure of the guide channel in the guide seat 1 is as follows: an upper guide wheel group and a lower guide wheel group are arranged opposite to each other in an upper and lower manner in the guide seat 1, and the gap between the upper guide wheel group and the lower guide wheel group forms the guide channel.
4. The multi-position rollover guardrail according to claim 1, characterized in that: The structure of the elastic mechanism includes: the guide hole in the mounting seat for the locking pin to pass through is a stepped hole, the large-diameter section of the stepped hole faces the corresponding fixed seat, the outer diameter of the locking pin is reduced to form a protruding shoulder, and a first spring is sleeved on the outside of the locking pin, one end of the first spring is against the shoulder of the locking pin, and the other end is against the step surface of the guide hole.
5. The multi-position rollover guardrail according to claim 4, characterized in that: It also includes a second spring and a guide seat 2; the guide seat 2 is fixedly installed on the guardrail shell between the guide seat 1 and the connecting head 1, and a stepped hole is provided in the guide seat 2, which passes through the guide seat 2 in the left and right directions and corresponds to the guide channel of the guide seat 1, and the large-diameter section of the stepped hole faces the connecting head 1. The guide rod passes through the guide channel and the stepped hole of the guide seat 2 in sequence and then is fixed to the connecting head 1. A second spring is arranged on the outer sleeve of the guide rod between the connecting head 1 and the guide seat 2, and one end of the second spring abuts against the connecting head 1, and the other end abuts against the step surface of the stepped hole of the guide seat 2.
6. The multi-position rollover guardrail according to claim 1, characterized in that: The slots on the corresponding end faces of each fixing seat include: a guardrail upright position slot, a guardrail inclined position slot, a guardrail horizontal position slot and a guardrail lowered position slot. The locking pin corresponding to the fixing seat will sequentially pass through the guardrail upright position slot, guardrail inclined position slot, guardrail horizontal position slot and guardrail lowered position slot on the corresponding end face of the fixing seat as the guardrail shell rotates around the axis relative to the fixing seat installed on the stretcher car toward the outside of the stretcher car. The position of the guardrail upright position slot can ensure that when the locking pin is inserted into the guardrail upright position slot, the guardrail shell can be in an upright position relative to the fixing seat and the stretcher car; the guardrail inclined position slot The position can ensure that when the locking pin is inserted into the guardrail tilting position slot, the guardrail shell can be in an inclined posture relative to the fixed seat and the stretcher; the position of the guardrail flat position slot can ensure that when the locking pin is inserted into the guardrail flat position slot, the guardrail shell can be in a flat posture relative to the fixed seat and the stretcher; the position of the guardrail lowering position slot can ensure that when the locking pin is inserted into the guardrail lowering position slot, the guardrail shell can be in a lowered posture relative to the fixed seat and the stretcher; the end surface of the fixed seat located between the guardrail lowering position slot and the guardrail flat position slot in each fixed seat smoothly transitions downward to the bottom surface of the guardrail lowering position slot through a guiding inclined surface.
7. The multi-position rollover guardrail according to claim 1, characterized in that: A handle accommodating guide chamber 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 shell is arranged in the guardrail shell, the handle is arranged in the handle accommodating guide chamber, and the side wall of the guardrail shell where the handle accommodating guide chamber is located is hollowed out to form an operating opening for people to hold the handle, two positioning columns extending into the handle accommodating guide chamber are arranged on the upper limit plate, and two spring positioning grooves are arranged at the end of the handle facing the upper limit plate, the two spring positioning grooves correspond to the two positioning columns one by one, and a return spring is arranged between each corresponding spring positioning groove and the positioning column, one end of the return spring is sleeved on the positioning column and presses upward against the upper limit plate, and the other end is inserted into the spring positioning groove, each return spring makes the handle always have the tendency to move downward along the handle accommodating guide chamber and reset to press against the lower limit plate.
8. The multi-position rollover guardrail according to claim 1, characterized in that: A shaft retaining ring fixedly mounted on the shaft is respectively arranged on the left and right sides of each fixing seat, and each shaft retaining ring limits the axial position of the fixing seat on the shaft so that the fixing seat can rotate relative to the shaft but cannot move along the shaft.
9. The multi-position rollover guardrail according to claim 1, characterized in that: A flip limiting mechanism is arranged between the guardrail shell and the fixing seat to prevent the guardrail shell from excessively rotating toward the inside of the stretcher relative to the fixing seat installed on the stretcher; the structure of the flip limiting mechanism includes: the shaft is fixedly installed on the guardrail shell so that the shaft can rotate synchronously with the guardrail shell, a section of arc-shaped limiting groove is circumferentially arranged on the outer peripheral wall of the shaft where the fixing seat is located, a limiting screw is arranged on the fixing seat, the limiting screw extends into the arc-shaped limiting groove, and the curved shape of the arc-shaped limiting groove can ensure that when the shaft rotates upward with the guardrail shell relative to the fixing seat until the groove wall at one end of the arc-shaped limiting groove abuts against the limiting screw, the guardrail shell is just in an upright posture, and when the shaft rotates downward with the guardrail shell relative to the fixing seat until the groove wall at the other end of the arc-shaped limiting groove abuts against the limiting screw, the guardrail shell is just in a lowered posture.
10. A stretcher trolley, characterized in that: The invention comprises a stretcher body, and multi-gear rollover guardrails are respectively installed on the left and right sides of the stretcher body. The multi-gear rollover guardrail adopts the multi-gear rollover guardrail as claimed in any one of claims 1 to 9.