A kind of anti-fall protection device of mobile X-ray machine

Abstract

The present application provides a fall protection device for a mobile X-ray machine, which relates to the field of medical devices. The fall protection device includes a first connecting mechanism and a second connecting mechanism. One end of the first connecting mechanism is connected to the column, and the other end is connected to the first end, so that the folding arm is in a torque balance state. The second connecting mechanism includes a ratchet, a pawl, a winding shaft and a first tensile member, the winding shaft is rotatably connected to the column, one end of the first tensile member is connected to the first end, and the other end is wound on the winding shaft, and the first tensile member is in a tensioned state, the ratchet is fixedly sleeved on the winding shaft, the pawl is connected to the column, and the pawl cooperates with the ratchet. When the second end of the folding arm moves upward, the ratchet rotates, and the tensioned first tensile member is partially retracted into the winding shaft; when the second end of the folding arm has a tendency to move downward, the ratchet is locked, and the second end of the folding arm cannot move downward.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an anti-fall protection device for a mobile X-ray machine. Background Art

[0002] An X-ray machine is a device that can generate X-rays. A mobile X-ray machine, also called a mobile DR, is an indispensable mobile medical device in hospitals. In the emergency room and wards of hospitals, mobile DR is needed to take pictures of patients. Therefore, a mobile DR device that is flexible, has powerful filming functions, and can move freely in the narrow space of the ward is what the hospital needs. The mobile DR products on the market are divided into two types in terms of mechanical structure: column-telescopic horizontal arm type and folding arm type. The two structures have their own characteristics. The ultimate goal is to achieve accurate and fast clinical positioning requirements.

[0003] The column and folding arm of the column-folding arm mobile X-ray machine are balanced by gas springs. However, when the gas spring fails due to gas leakage or other faults, the head at the end of the folding arm will lose balance and there is a risk of falling. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a mobile X-ray machine anti-fall protection device, which can protect the X-ray machine from unexpected failures that may cause the machine head to fall.

[0005] In a first aspect, an embodiment of the present application provides an anti-fall protection device for a mobile X-ray machine, the anti-fall protection device is used to be installed on the mobile X-ray machine, and the mobile X-ray machine includes: a column and a folding arm.

[0006] The folding arm has a first end and a second end opposite to each other, the upright post is hinged to the folding arm, and a hinge point between the upright post and the folding arm is located between the first end and the second end.

[0007] The anti-fall protection device comprises a first connecting mechanism and a second connecting mechanism.

[0008] One end of the first connecting mechanism is connected to the column, and the other end is connected to the first end, so that the folding arm is in a moment balance state.

[0009] The second connecting mechanism includes a ratchet, a pawl, a winding shaft and a first stretching member. The winding shaft is rotatably connected to the column. One end of the first stretching member is connected to the first end, and the other end is wound on the winding shaft, and the first stretching member is in a tensioned state. The ratchet is fixedly sleeved on the winding shaft, and the pawl is connected to the column. The pawl cooperates with the ratchet so that when the second end moves upward, the ratchet rotates, and when the second end tends to move downward, the ratchet is locked.

[0010] In the above implementation process, the first connecting mechanism of the anti-fall protection device can put the folding arm in a balanced state. The reel of the second connecting mechanism can rotate relative to the column, and the pawl and the ratchet cooperate so that the ratchet can only rotate in one direction and cannot be reversed. After the pawl is engaged with the ratchet, the first tensile member can be reeled in by the reel but cannot be unreeled. When the second end of the folding arm moves upward, the ratchet rotates, and the tensioned first tensile member is partially retracted into the reel; when the second end of the folding arm tends to move downward, the ratchet is locked, and the second end of the folding arm cannot move downward.

[0011] The second connection mechanism utilizes the unidirectional rotation characteristics of the ratchet and the pawl to provide a second level of protection for the X-ray machine, thereby avoiding the accident of the second end of the folding arm falling when the first connection mechanism fails.

[0012] In a possible implementation, the second connection mechanism further includes a first mounting plate having a first through hole in the middle thereof, the winding shaft is rotatably mounted on the first mounting plate through the first through hole, and the first mounting plate is fixedly connected to the column.

[0013] In the above implementation process, the reel is rotatably mounted on the column via the first mounting plate.

[0014] In a possible implementation, the pawl includes a fixed end and a mating end, the fixed end is hinged to the column, and the fixed end is provided with a first rotating member to make the mating end contact with the teeth of the ratchet.

[0015] In the above implementation process, the pawl can rotate relative to the column with the fixed end as the fulcrum, and the position where the pawl's mating end contacts the ratchet gear is the initial position. When the mating end of the pawl moves in the direction away from the ratchet, it needs to overcome the elastic work of the first rotating part; when the external force is released, the pawl is subjected to the rebound force of the first rotating part, and the mating end of the pawl returns to the initial position in contact with the ratchet gear.

[0016] In a possible implementation manner, the first rotating member is a tension spring.

[0017] In a possible embodiment, the anti-fall protection device also includes a control mechanism, which includes a controller and a second tensile member, the controller is installed on the column or the folding arm, one end of the second tensile member is connected to the controller, and the other end is connected to the mating end so that the mating end can be optionally separated from the tooth portion of the ratchet.

[0018] In the above implementation process, the control mechanism can selectively separate the mating end of the pawl from the teeth of the ratchet wheel through the second stretching member. When the mating end of the pawl is separated from the teeth of the ratchet wheel, the ratchet wheel can rotate clockwise or counterclockwise, so that the folding arm can also move upward or downward; when the mating end of the pawl is mated with the teeth of the ratchet wheel, the ratchet wheel can only move in one direction, so that the folding arm can only move upward but not downward.

[0019] In a possible implementation, the controller includes a winding wheel, which is rotatably connected to the folding arm, and one end of the second stretching member away from the mating end is wound on the winding wheel.

[0020] In the above implementation process, rotating the winding wheel can reel in or unwind the second stretching member. Unwinding will cause the mating end of the pawl to engage with the teeth of the ratchet wheel, and rewinding will rotate the mating end of the pawl away from the ratchet wheel, so that the mating end of the pawl is separated from the teeth of the ratchet wheel.

[0021] In a possible implementation, the winding wheel is provided with two spaced-apart limiting members, a blocking member fixedly connected to the folding arm is provided between the two limiting members, and the blocking member can block the two limiting members so that the winding wheel does not continue to rotate.

[0022] In the above implementation process, the winding wheel can only rotate by the angle between the two limit members, thereby preventing the winding wheel from over-rotating.

[0023] In a possible embodiment, the controller also includes a second mounting plate and a second rotating member, the second mounting plate has a second through hole in the middle, the winding wheel is rotatably mounted on the second mounting plate through the second through hole, the second mounting plate is fixedly connected to the folding arm, one end of the second rotating member is connected to the winding wheel, and the other end is connected to the second mounting plate.

[0024] In the above implementation process, the winding wheel can be rotatably mounted on the folding arm through the second mounting plate. The winding wheel takes the initial position that the second stretching member is in a tensioned state when the mating end of the pawl contacts the gear of the ratchet. When the winding wheel is rotated to reel in the second stretching member, it is necessary to overcome the elastic work of the second rotating member. When the external force is released, the winding wheel receives the rebound force of the second rotating member and returns to the initial position. At this time, the mating end of the clamp returns to the initial position in contact with the gear of the ratchet.

[0025] In a possible implementation, the second connection mechanism includes a storage box and a spiral spring, the storage box is fixedly connected to the column, the inner ring of the spiral spring is fixedly connected to the winding shaft, and the outer ring of the spiral spring is fixedly connected to the storage box.

[0026] In the above implementation process, the spiral spring can put the first tensioning member in a tensioned state.

[0027] In a possible implementation manner, the first connecting mechanism is a gas spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A side view of a mobile X-ray machine with an anti-fall protection device according to an embodiment of the present application;

[0030] Figure 2 A front view of a mobile X-ray machine with an anti-fall protection device according to an embodiment of the present application;

[0031] Figure 3 A front view of a second connecting mechanism according to an embodiment of the present application;

[0032] Figure 4 is a cross-sectional view of a second connecting mechanism according to an embodiment of the present application;

[0033] Figure 5 A front view of the control structure of an embodiment of the present application;

[0034] Figure 6 It is a cross-sectional view of the control structure of an embodiment of the present application.

[0035] Icon: 10-mobile X-ray machine; 100-main body; 200-column; 300-folding arm; 301-first end; 302-second end; 303-hinge point; 400-head assembly; 500-first connecting mechanism; 600-second connecting mechanism; 610-ratchet; 620-pawl; 621-fixed end; 622-matching end; 630-winding shaft; 640-first stretching member; 650-first mounting plate; 660-storage wheel; 670-storage box; 680-volute spring; 700-control mechanism; 710-second stretching member; 720-winding wheel; 730-second rotating member; 740-second mounting plate; 750-connecting block; 760-limiting member; 770-blocking member; 780-handle. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the term "vertical" and the like do not mean that the component is required to be absolutely vertical, but can be slightly tilted. For example, "vertical" only means that its direction is more vertical than "horizontal", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0041] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] See also Figure 1 and 2 An embodiment of the present application provides a mobile X-ray machine 10 , which includes a main body 100 , a column 200 , a folding arm 300 and a head assembly 400 .

[0043] Among them, the column 200 is vertically installed on the main body 100, the folding arm 300 is hinged to the top of the column 200, the folding arm 300 can rotate relative to the top of the column 200, and the head assembly 400 is arranged at one end of the folding arm 300 away from the column 200.

[0044] The folding arm 300 has a first end 301 and a second end 302 opposite to each other. The hinge point 303 of the column 200 and the folding arm 300 is located between the first end 301 and the second end 302 , and the distance from the hinge point 303 to the first end 301 is smaller than the distance from the hinge point 303 to the second end 302 .

[0045] If no external force is applied to the folding arm 300 , it is difficult for the folding arm 300 to maintain balance only with the support of the column 200 .

[0046] The anti-fall protection device includes a first connecting mechanism 500, one end of the first connecting mechanism 500 is connected to the column 200, and the other end of the first connecting mechanism 500 is connected to the first end 301 of the folding arm 300. The first connecting mechanism 500 can provide a pulling force or a pushing force to the first end 301 of the folding arm 300 to put the folding arm 300 in a torque balance state.

[0047] In such Figure 1 and 2 In the embodiment shown, the first connection mechanism 500 is a gas spring. In some other embodiments of the present application, the first connection mechanism 500 can also be other elastic structures.

[0048] The anti-fall protection device also includes a second connecting mechanism 600, which can connect the second end 302 of the folding arm 300 and the column 200, providing a second layer of protection for the X-ray machine to prevent the folding arm 300 from falling and causing an accident when the first connecting mechanism 500 fails.

[0049] See also Figure 1 , 3 4, the second connecting mechanism 600 includes a ratchet 610, a pawl 620, a winding shaft 630 and a first tensioning member 640.

[0050] The reel 630 is rotatably connected to the column 200, one end of the first tensioning member 640 is connected to the first end 301 of the folding arm 300, the other end of the first tensioning member 640 is reeled on the reel 630, and the first tensioning member 640 is in a tensioned state. The wheel sleeve is disposed on the reel 630 and is fixedly connected to the reel 630, one end of the pawl 620 is connected to the column 200, and the other end of the pawl 620 cooperates with the tooth portion of the ratchet 610, so that the ratchet 610 can only move in one direction and cannot reverse. For example, Figure 3 As shown, when the pawl 620 cooperates with the teeth of the ratchet 610, the ratchet 610 can only rotate counterclockwise. When the ratchet 610 rotates clockwise, the teeth of the ratchet 610 will be stuck by the pawl 620 and cannot rotate.

[0051] When the second end 302 of the folding arm 300 moves upward (such as Figure 13), the ratchet 610 rotates counterclockwise, and the tensioned first stretching member 640 is partially retracted into the reel 630; when the second end 302 of the folding arm 300 moves downward (as shown in FIG. Figure 1 As shown in the clockwise direction, the ratchet 610 Figure 3 As shown, the first tensioning member 640 is stuck by the ratchet 620 and cannot rotate counterclockwise, and cannot come out from the unwinding portion of the take-up shaft 630 .

[0052] In such Figure 1 , 3 In the embodiment shown in Figure 4, the first tension member 640 is a steel wire rope. In some other embodiments of the present application, the first tension member 640 can also be other linear bodies with good strength, such as nylon wire.

[0053] Please continue reading Figure 3 and 4 The pawl 620 includes a fixed end 621 and a matching end 622. The fixed end 621 of the pawl 620 is hinged to the column 200, and the matching portion is used to match with the teeth of the ratchet 610 so that the ratchet 610 can only rotate in one direction, and the matching portion can rotate with the fixed end 621 as a fulcrum.

[0054] Optionally, the fixed end 621 of the pawl 620 is provided with a first rotating member (not shown).

[0055] The pawl 620 takes the position where its mating end 622 contacts the gear of the ratchet 610 as its initial position. When the mating end 622 of the pawl 620 moves in the direction away from the ratchet 610, it needs to overcome the elastic work of the first rotating part. When the external force is released, the pawl 620 is subjected to the rebound force of the first rotating part, and the mating end 622 of the pawl 620 returns to the initial position in contact with the gear of the ratchet 610.

[0056] In the embodiment of the present application, the first rotating member is a torsion spring. In some other embodiments of the present application, the first rotating member can also be some other elastic members.

[0057] It should be noted that the reel 630 can be directly rotatably connected to the column 200, or can be connected to the column 200 through other components. Similarly, one end of the pawl 620 can be directly connected to the column 200, or can be connected to the column 200 through other components.

[0058] The second connecting mechanism 600 also includes a first mounting plate 650, which is fixedly connected to the column 200. The first mounting plate 650 has a first through hole in the middle. The winding shaft 630 is rotatably mounted on the first mounting plate 650 through the first through hole. The fixed part of the pawl 620 is hinged to the first mounting plate 650.

[0059] The first mounting plate 650 has two opposite sides centered on the first mounting plate 650. Figure 3 and 4 In the illustrated embodiment, the pawl 620 and the ratchet 610 are located on one side of the first mounting plate 650 , and the first tensioning member 640 is rolled up on the other side of the first mounting plate 650 .

[0060] The second connection mechanism 600 further includes a storage wheel 660 , a storage box 670 and a spiral spring 680 .

[0061] The receiving wheel 660 is sleeved on the winding shaft 630 and fixedly connected to the winding shaft 630 . One end of the first stretching member 640 is wound on the receiving wheel 660 .

[0062] The storage box 670 is fixedly connected to the first mounting plate 650 , the inner ring of the spiral spring 680 is fixedly connected to the winding shaft 630 , and the outer ring of the spiral spring 680 is fixedly connected to the storage box 670 .

[0063] When installing the first tensioning member 640 , by adjusting the installation positions of the spiral spring 680 and the first installation plate 650 , the spiral spring 680 generates tension, so that the first tensioning member 640 is in a tensioned state.

[0064] In such Figure 3 and 4 In the illustrated embodiment, the storage wheel 660, the storage box 670 and the spiral spring 680 are located on the side of the first mounting plate 650 where the ratchet wheel 610 is not provided. The column 200 has a groove at the position where the first mounting plate 650 is installed, and the storage wheel 660, the storage box 670 and the spiral spring 680 are all arranged in the groove of the column 200.

[0065] See also Figure 1 , 3 ~6, the anti-fall protection device also includes a control mechanism 700, the control mechanism 700 includes a controller and a second tension member 710, the controller is installed on the column 200 or the folding arm 300, one end of the second tension member 710 is connected to the controller, and the other end is connected to the mating end 622 so that the mating end 622 can be optionally separated from the tooth portion of the ratchet 610.

[0066] The control mechanism 700 can selectively separate the mating end 622 of the pawl 620 from the teeth of the ratchet 610 through the second stretching member 710. When the mating end 622 of the pawl 620 is separated from the teeth of the ratchet 610, the ratchet 610 loses the restraint of the pawl 620 and can rotate clockwise or counterclockwise, so that the folding arm 300 can also move upward (counterclockwise) or downward (clockwise); when the mating end 622 of the pawl 620 is mated with the teeth of the ratchet 610, the ratchet 610 can only move in one direction, so that the folding arm 300 can only move upward (counterclockwise) but not downward (clockwise).

[0067] In such Figure 1 , 3 In the embodiment shown in Figures 5 to 6, the second tensioning member 710 is a steel wire rope. In some other embodiments of the present application, the second tensioning member 710 can also be other linear bodies with good strength, such as nylon wire.

[0068] Optionally, the controller is installed at one end of the folding arm 300 close to the head assembly 400 to facilitate operator control.

[0069] Furthermore, in order to prevent the second stretching member 710 from affecting the working state of the mobile X-ray machine 10, after the second stretching member 710 is extended from the controller, it first reaches the first end 301 of the folding arm 300 along the extension direction of the folding arm 300, and then is arranged along the extension direction of the column 200, and finally connected to the mating end 622 of the pawl 620.

[0070] The controller includes a winding wheel 720 , which is rotatably connected to the folding arm 300 , and one end of the second stretching member 710 away from the mating end 622 is wound on the winding wheel 720 .

[0071] The rotating reel 720 can reel or unreel the second stretching member 710. When the second stretching member 710 is reeled, the mating end 622 of the pawl 620 is rotated in a direction away from the ratchet 610, so that the mating end 622 of the pawl 620 is separated from the teeth of the ratchet 610. After the movement of the folding arm 300 is completed, the second stretching member 710 is unreeled, so that the mating end 622 of the pawl 620 is mated with the teeth of the ratchet 610. At this time, the folding arm 300 can only move upward (counterclockwise) but not downward (clockwise).

[0072] The controller further includes a second rotating member 730 , one end of which is connected to the winding wheel 720 , and the other end of which is connected to the folding arm 300 .

[0073] The winding wheel 720 takes the initial position of the second tensioning member 710 in a tensioned state when the mating end 622 of the pawl 620 contacts the gear of the ratchet 610. When the winding wheel 720 is rotated to wind the second tensioning member 710, it is necessary to overcome the elastic work of the second rotating member 730. At this time, the mating end 622 of the pawl 620 rotates in a direction away from the ratchet 610, so that the mating end 622 of the pawl 620 is separated from the ratchet 610, and the ratchet 610 is in a freely movable state. When the external force is released, the winding wheel 720 receives the rebound force of the second rotating member 730 and returns to the initial position. At this time, the mating end 622 of the clamp returns to the initial position in contact with the gear of the ratchet 610.

[0074] In such Figure 5 and 6 In the embodiment shown, the first rotating member is a tension spring. In some other embodiments of the present application, the first rotating member can also be other elastic members.

[0075] It should be noted that the reel 720 can be directly connected to the folding arm 300, or can be connected to the folding arm 300 through other components. Similarly, one end of the second rotating member 730 can be directly connected to the folding arm 300, or can be connected to the folding arm 300 through other components.

[0076] The controller further includes a second mounting plate 740, which is fixedly connected to the folding arm 300, and has a second through hole in the middle of the second mounting plate 740, through which the winding wheel 720 is rotatably mounted on the second mounting plate 740. A connecting block 750 is also provided on the second mounting plate 740, and has a third through hole in the middle of the connecting block 750, through which the second stretching member 710 passes and is guided in the extending direction by the connecting block 750, and one end of the second rotating member 730 is connected to the connecting block 750.

[0077] The winding wheel 720 is provided with two spaced apart limiting members 760 , and the second mounting plate 740 is provided with a blocking member 770 , and the blocking member 770 is located between the two limiting members 760 .

[0078] When the winding wheel 720 is controlled to rotate, the winding wheel 720 can only rotate within the range between the two limiting members 760. Figure 5 As shown, when the winding wheel 720 rotates counterclockwise, the limiting member 760 on the left is blocked by the blocking member 770, and the winding wheel 720 cannot continue to rotate counterclockwise; when the winding wheel 720 rotates clockwise, the limiting member 760 on the right is blocked by the blocking member 770, and the winding wheel 720 cannot continue to rotate clockwise.

[0079] In such Figure 5 In the illustrated embodiment, the limiting member 760 is a limiting block, and the blocking member 770 is a blocking block.

[0080] The controller further includes a handle 780 , which is fixedly connected to one end of the winding wheel 720 .

[0081] The second mounting plate 740 has two opposite sides centered on the second mounting plate 740. Figure 5 and 6 In the illustrated embodiment, the second rotating member 730 , the connecting block 750 , the limiting member 760 and the blocking member 770 are all located on one side of the second mounting plate 740 , and the handle 780 is disposed on the other side of the second mounting plate 740 .

[0082] In summary, the embodiment of the present application provides a mobile X-ray machine anti-fall protection device, wherein the first connection mechanism 500 of the anti-fall protection device can make the folding arm 300 in a balanced state; the reel 630 of the second connection mechanism 600 can rotate relative to the column 200, and the pawl 620 and the ratchet 610 cooperate so that the ratchet 610 can only rotate in one direction and cannot be reversed. After the pawl 620 cooperates with the ratchet 610, the first tensioning member 640 can be reeled by the reel 630 but cannot be unreeled. When the second end 302 of the folding arm 300 moves upward, the ratchet 610 rotates, and the tensioned first tensioning member 640 is partially retracted into the reel 630; when the second end 302 of the folding arm 300 has a tendency to move downward, the ratchet 610 is locked, and the second end 302 of the folding arm 300 cannot move downward. The second connection mechanism 600 utilizes the one-way rotation characteristics of the ratchet 610 and the pawl 620 to provide a second level of protection for the X-ray machine, thereby preventing the second end 302 of the folding arm 300 from falling when the first connection mechanism 500 fails. The anti-fall protection device of the present application is simple in structure, reliable, and easy to operate, which improves safety while not affecting the normal use of the machine.

[0083] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mobile X-ray machine anti-fall protection device, the anti-fall protection device is used to be installed on the mobile X-ray machine, the mobile X-ray machine comprises: Column; A folding arm, the folding arm having a first end and a second end opposite to each other, the upright post being hinged to the folding arm, and a hinge point between the upright post and the folding arm being located between the first end and the second end; Characterized in that the anti-fall protection device comprises: A first connecting mechanism, one end of which is connected to the column, and the other end of which is connected to the first end, so that the folding arm is in a moment balance state; The second connecting mechanism includes a ratchet, a pawl, a winding shaft and a first stretching member, the winding shaft is rotatably connected to the column, one end of the first stretching member is connected to the first end, and the other end is wound on the winding shaft, and the first stretching member is in a tensioned state, the ratchet is fixedly sleeved on the winding shaft, the pawl is connected to the column, and the pawl cooperates with the ratchet so that when the second end moves upward, the ratchet rotates, and when the second end tends to move downward, the ratchet is locked.

2. The anti-fall protection device for a mobile X-ray machine according to claim 1, characterized in that: The second connecting mechanism also includes a first mounting plate, a first through hole is provided in the middle of the first mounting plate, the winding shaft is rotatably mounted on the first mounting plate through the first through hole, and the first mounting plate is fixedly connected to the column.

3. The anti-fall protection device for a mobile X-ray machine according to claim 1, characterized in that: The pawl comprises a fixed end and a matching end, wherein the fixed end is hinged to the column, and a first rotating member is provided at the fixed end to enable the matching end to contact with the teeth of the ratchet wheel.

4. The anti-fall protection device for a mobile X-ray machine according to claim 3, characterized in that: The first rotating member is a tension spring.

5. The anti-fall protection device for a mobile X-ray machine according to claim 3, characterized in that: The anti-fall protection device also includes a control mechanism, which includes a controller and a second stretching member, wherein the controller is installed on the column or the folding arm, one end of the second stretching member is connected to the controller, and the other end is connected to the mating end so that the mating end can be optionally separated from the tooth portion of the ratchet.

6. The anti-fall protection device for a mobile X-ray machine according to claim 5, characterized in that: The controller comprises a winding wheel, the winding wheel is rotatably connected to the folding arm, and one end of the second stretching member away from the matching end is wound on the winding wheel.

7. The anti-fall protection device for a mobile X-ray machine according to claim 6, characterized in that: The winding wheel is provided with two spaced-apart limiting members, a blocking member fixedly connected to the folding arm is provided between the two limiting members, and the blocking member can block the two limiting members so that the winding wheel does not continue to rotate.

8. The anti-fall protection device for a mobile X-ray machine according to claim 6, characterized in that: The controller also includes a second mounting plate and a second rotating member, the second mounting plate has a second through hole in the middle, the winding wheel is rotatably mounted on the second mounting plate through the second through hole, the second mounting plate is fixedly connected to the folding arm, one end of the second rotating member is connected to the winding wheel, and the other end is connected to the second mounting plate.

9. The anti-fall protection device for a mobile X-ray machine according to any one of claims 1 to 8, characterized in that: The second connection mechanism includes a storage box and a spiral spring. The storage box is fixedly connected to the column, the inner ring of the spiral spring is fixedly connected to the winding shaft, and the outer ring of the spiral spring is fixedly connected to the storage box.

10. The anti-fall protection device for a mobile X-ray machine according to any one of claims 1 to 8, characterized in that: The first connecting mechanism is a gas spring.

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