A body position fixing device for radiological examination

Abstract

The application discloses a body position fixing device for radiology examination, which comprises a bed body, a limiting mechanism, an unlocking mechanism and a plurality of fixing units, wherein the limiting mechanism, the unlocking mechanism and the fixing units are arranged on the bed body, the limiting mechanism and the unlocking mechanism are matched with the fixing units, each fixing unit comprises a clamping plate, a first connecting rod, a second connecting rod, a crank, a movable block, a cylinder and a base, the base is provided with a movable groove, the cylinder is arranged in the movable groove, the cylinder is connected with the movable block, the two sides of the movable block are symmetrically provided with the second connecting rod, the crank and the movable block are rotatably connected with the second connecting rod, the crank is rotatably connected with the clamping plate, and the clamping plate and the base are rotatably connected with the first connecting rod. Through the application of the body position fixing device for radiology examination, the operation process is simplified, the operation burden of medical staff is reduced, and the work efficiency of the medical staff is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a body positioning device for radiological examinations. Background Technology

[0002] In modern medical diagnosis, radiological examinations serve as an important auxiliary diagnostic tool, widely used in the detection and assessment of diseases. Common radiological examination equipment includes X-ray machines, CT scanners, and MRI (Magnetic Resonance Imaging). These devices impose strict requirements on patient positioning during the diagnostic process. To obtain clear imaging results, patients need to maintain a specific posture during the examination, especially when examining the limbs.

[0003] According to the technology described in existing patent document (CN111184527A), a limb positioning device for radiological examinations mainly includes a base plate, a strap assembly, and two opposing vertical plates forming a limb positioning cavity between them. The width of the positioning cavity can be adjusted to fit the size of the limb by moving the movable vertical plates along a guide structure; simultaneously, the strap assembly and the airbag work together to ensure the limb is securely fixed. This device utilizes the airbag's inflation to conform to the limb surface, improving comfort and fit, and is suitable for patients of different body types and limb locations.

[0004] While the aforementioned device addresses limb immobilization to some extent, it still suffers from significant shortcomings in terms of convenience: the device requires adjusting the position of the movable vertical plate to fit the limb size, securing it with straps, and finally inflating the airbag. This series of steps is quite complex, increasing the workload for medical staff and prolonging preparation time before examinations. Especially in emergency or high-frequency examination scenarios, this cumbersome procedure can lead to reduced efficiency. Summary of the Invention

[0005] In view of this, to solve the above problems, the purpose of this invention is to provide a body positioning device for radiological examinations, comprising: a bed, a limiting mechanism, an unlocking mechanism, and several fixing units. The limiting mechanism, the unlocking mechanism, and the several fixing units are all disposed on the bed. The limiting mechanism and the unlocking mechanism cooperate with the fixing units. Each fixing unit includes: a clamping plate, a first connecting rod, a second connecting rod, a crank, a movable block, a cylinder, and a base. The base has a movable groove. The cylinder is disposed in the movable groove. The upper end of the cylinder is connected to the movable block. The second connecting rods are symmetrically arranged on both sides of the movable block. One end of the second connecting rod is rotatably connected to the movable block, and the other end of the second connecting rod is rotatably connected to one end of the crank. The other end of the crank is rotatably connected to the clamping plate. One end of the first connecting rod is rotatably connected to the clamping plate, and the other end of the first connecting rod is rotatably connected to the upper end of the base.

[0006] In another preferred embodiment, the bed body is provided with a plurality of fixing grooves, and the base is slidably disposed in the fixing grooves.

[0007] In another preferred embodiment, the limiting mechanism includes: a positioning post, an outer shaft, a piston, and a limiting ball. A groove is formed on the bottom wall of the fixing groove, a sliding groove is formed on the cylinder, and a side groove is formed on the side wall of the sliding groove. The lower end of the positioning post is slidably disposed within the groove, and the upper end of the positioning post extends into the sliding groove. The outer shaft is disposed between the positioning post and the cylinder, and the lower end of the outer shaft is fixedly connected to the bottom wall of the fixing groove. The piston is slidably disposed within the sliding groove and connected to the upper end of the positioning post. The outer shaft has several limiting holes along its circumference, and several arc-shaped grooves are formed on the outer side wall of the positioning post. Each arc-shaped groove contains a limiting ball, which is operably engaged with the side groove.

[0008] In another preferred embodiment, the unlocking mechanism includes: a pad, an unlocking groove is provided on the side wall of the groove, the pad is slidably disposed in the unlocking groove and the groove, the end of the pad near the groove has an inclined surface, and the lower end of the positioning post is operably slidable along the inclined surface.

[0009] In another preferred embodiment, it further includes: a support pad and an airbag, the support pad being connected to the upper end of the movable block, the airbag being disposed on one side of the two clamping plates that are close to each other, and the airbag being in communication with the slide groove.

[0010] In another preferred embodiment, a slot is provided on the side wall of the fixing groove, and a cover plate is slidably disposed in the slot.

[0011] In another preferred embodiment, a protective film is provided between the clamping plate and the support pad.

[0012] In another preferred embodiment, the airbag has a plurality of inflation chambers inside, and all of the inflation chambers are connected to the slide groove.

[0013] In another preferred embodiment, the surface of the support pad is provided with a plurality of ventilation holes.

[0014] In another preferred embodiment, an elastic membrane is provided within the side groove.

[0015] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: By applying the present invention, a body positioning fixation device for radiological examinations is proposed, which eliminates the multiple steps required by traditional devices, such as manually adjusting the movable vertical plate, binding and fixing, and inflating the airbag. Medical staff only need to guide the patient to place the limb in the corresponding position, and the fixation unit can automatically adjust and lock the position of the splint by the weight of the limb. This simplifies the operation process, reduces the workload of medical staff, and saves critical examination time for patients in emergency situations. Moreover, the unlocking operation of the device is also simple, and it can be easily unlocked by simply moving the pad, which helps to improve the work efficiency of medical staff. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a body positioning device for radiological examinations according to the present invention;

[0017] Figure 2 This is a schematic diagram of the fixing unit of a body positioning device for radiological examination according to the present invention;

[0018] Figure 3 This is a cross-sectional view of the fixing unit of a body positioning device for radiological examination according to the present invention;

[0019] Figure 4 This is a schematic diagram of the installation of a fixing unit for a body positioning device used in radiological examinations according to the present invention;

[0020] Figure 5 for Figure 4 A magnified view of a portion of point M in the middle.

[0021] In the attached image:

[0022] 1. Bed frame; 2. Clamping plate; 3. Base; 101. Fixing groove; 102. Groove; 103. Elastic element; 104. Positioning post; 105. Pad; 106. Unlocking groove; 107. Outer shaft; 108. Piston; 109. Limiting ball; 110. Limiting hole; 111. Arc groove; 201. Airbag; 202. First connecting rod; 203. Crank; 204. Second connecting rod; 205. Moving block; 206. Support pad; 207. Support shaft; 208. Guide tube; 209. Cylinder; 210. Slide groove; 211. Side groove; 301. Moving groove. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] It should be noted that the terms "horizontal" and "vertical" in this invention are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0026] like Figure 1-5The diagram illustrates a preferred embodiment of a patient positioning device for radiological examinations, comprising: a bed 1, a limiting mechanism, an unlocking mechanism, and several fixing units. The limiting mechanism, unlocking mechanism, and fixing units are all mounted on the bed 1. The fixing units are detachably connected to the bed 1 and are used to fix different parts of the patient's body. The limiting mechanism and unlocking mechanism cooperate with the fixing units. Each fixing unit includes: a clamp 2, a first connecting rod 202, a second connecting rod 204, a crank 203, a movable block 205, a cylinder 209, and a base 3. The base 3 has a movable groove 301, and a cylinder 209 is disposed in the movable groove 301. The upper end of the cylinder 209 is welded to the movable block 205. The movable block 205 is symmetrically provided with second connecting rods 204 on both sides. One end of the second connecting rod 204 is rotatably connected to the movable block 205, and the other end of the second connecting rod 204 is rotatably connected to one end of the crank 203. The other end of the crank 203 is rotatably connected to the clamping plate 2. One end of the first connecting rod 202 is rotatably connected to the clamping plate 2, and the other end of the first connecting rod 202 is rotatably connected to the upper end of the base 3.

[0027] Furthermore, as a preferred embodiment, the bed body 1 has several fixing slots 101, and the base 3 is slidably disposed within the fixing slots 101. Furthermore, by providing several fixing slots 101, medical staff can select the most suitable position of the fixing slot 101 according to the patient's actual body shape, which is beneficial for achieving precise adaptation to the limb fixation needs of patients with different heights, body shapes, and examination requirements.

[0028] Furthermore, in a preferred embodiment, the limiting mechanism includes: a positioning post 104, an outer shaft 107, a piston 108, and a limiting ball 109. A groove 102 is formed on the bottom wall of the fixing groove 101, a sliding groove 210 is formed on the cylinder 209, and a side groove 211 is formed on the side wall of the sliding groove 210. The lower end of the positioning post 104 is slidably disposed within the groove 102, and the upper end of the positioning post 104 extends into the sliding groove 210. The positioning post 104 can slide along the sliding groove 210. The outer shaft 107 is disposed between the positioning post 104 and the cylinder 209, and the lower end of the outer shaft 107... The piston 108 is slidably disposed in the sliding groove 210 and bonded to the upper end of the positioning post 104. The outer shaft 107 has several limiting holes 110 along the circumferential direction. The outer side wall of the positioning post 104 has several arc-shaped grooves 111. The arc-shaped grooves 111 match the outer contour of the limiting ball 109. Each arc-shaped groove 111 is provided with a limiting ball 109. The limiting ball 109 is operablely engaged with the side groove 211. When the limiting ball 109 enters the side groove 211, the side groove 211 can match the limiting ball 109. Further, when the movable block 205 is displaced to a preset distance, the positioning post 104 can push the limiting ball 109 away from the arc-shaped groove 111. The limiting ball 109 leaves the arc-shaped groove 111 until the limiting ball 109 enters the limiting hole 110 and engages with the side groove 211.

[0029] Furthermore, as a preferred embodiment, an elastic element 103 is provided between the positioning post 104 and the groove 102.

[0030] Furthermore, as a preferred embodiment, the elastic element 103 is preferably configured as an air spring. Further, air springs are prior art and will not be described in detail here.

[0031] Furthermore, in a preferred embodiment, the number of side grooves 211 is preferably set to one, and an elastic support is provided between the piston 108 and the upper inner wall of the slide groove 210. The elastic support is preferably set as an air spring. Furthermore, during the downward movement of the movable block 205, the cylinder 209 can drive the piston 108 and the positioning post 104 to move downward until the side groove 211 is aligned with the limiting hole 110. At this point, the elastic support can squeeze the piston 108, and the piston 108 will then squeeze the positioning post 104. Under the action of the positioning post 104, the limiting ball 109 enters the limiting hole 110 and the side groove 211 until the arc groove 111 is misaligned with the limiting hole 110. The limiting ball 109 will not easily detach from the limiting hole 110 and the side groove 211.

[0032] In another embodiment of this utility model, when the air pressure change in the slide groove 210 is greater than a preset threshold, the limiting mechanism can engage with the side groove 211. At this time, the number of side grooves 211 is preferably set to multiple, and the multiple side grooves 211 are linearly arranged along the length direction of the cylinder 209. When the limb is thicker, the displacement distance between the clamp 2 and the movable block 205 is shorter, and the movable distance between the clamp 2 and the limb is also smaller. Therefore, the clamp 2 only needs to move a small distance for the airbag 201 to be squeezed, which in turn causes a large air pressure change to occur in the slide groove 210. At this time, the air pressure change will act on the piston 108 to make the piston 108 move downward. The downward movement of the piston 108 can drive the positioning post 104 to move downward as well. During the downward movement of the positioning post 104, the side wall of the arc groove 111 will squeeze the limiting ball 109, so that the limiting ball 109 is oriented towards the positioning post 104. The movement trend is such that when the side groove 211 closest to the limiting ball 109 is directly opposite the limiting hole 110, the limiting ball 109 quickly enters the side groove 211 and is fixed. When the limb is thin, the movable distance between the clamp 2 and the limb is large. At this time, the clamp 2 needs to move a large distance to compress the airbag 201. At this time, the movable block 205 needs to move a large distance so that the air pressure change in the slide groove 210 can reach the preset threshold. When the air pressure change in the slide groove 210 is greater than the preset threshold, the limiting hole 110 will pass through several side grooves 211 as it moves downward with the positioning post 104. When the limiting hole 110 is directly opposite one of the side grooves 211, the positioning post 104 stops moving, and the limiting ball 109 is discharged into the limiting hole 110 and the side groove 211, forming a "ball-groove" locking structure so that the limiting ball 109 will not easily detach from the limiting hole 110 and the side groove 211.

[0033] Furthermore, in a preferred embodiment, the unlocking mechanism includes: a pad 105, an unlocking groove 106 formed on the side wall of the groove 102, the unlocking groove 106 communicating with the groove 102, the pad 105 slidably disposed within the unlocking groove 106 and the groove 102, the end of the pad 105 near the groove 102 having an inclined surface, and the lower end of the positioning post 104 operably sliding along the inclined surface. Further, the pad 105 is preferably configured as a rod-shaped structure, with the end of the pad 105 away from the groove 102 extending to one side of the bed frame 1. By pushing or pressing the pad 105, the pad 105 can be inserted into the groove 102. When the pad 105 is inserted into the groove 102, the pad 105 can slide in cooperation with the lower end of the positioning post 104, and the lower end of the positioning post 104 can slide along the inclined surface of the pad 105, thereby lifting the positioning post 104 upwards.

[0034] Furthermore, as a preferred embodiment, it also includes: a support pad 206 and an airbag 201. The support pad 206 is connected to the upper end of the movable block 205, and the airbag 201 is disposed on the side of the two clamping plates 2 that are close to each other. The airbag 201 is connected to the slide groove 210.

[0035] Furthermore, as a preferred embodiment, a support shaft 207 is welded and fixed between the support pad 206 and the movable block 205.

[0036] Furthermore, as a preferred embodiment, the support pad 206 is preferably made of medical-grade silicone. Moreover, medical-grade silicone possesses excellent flexibility and resilience; when a patient's limb is placed on the support pad 206, the medical-grade silicone can undergo slight deformation according to the contour of the patient's limb, thereby making the support pad 206 fit the patient's limb more closely and improving patient comfort.

[0037] Furthermore, as a preferred embodiment, a slot is provided on the side wall of the fixing groove 101, and a cover plate is slidably disposed in the slot. Further, once a suitable fixing groove 101 is determined, the cover plates in the remaining fixing grooves 101 can be pulled out of the slot to cover the unused fixing grooves 101. The cover plates can effectively prevent dust, liquid splashes, or detached skin flakes from entering the fixing groove 101, thereby helping to avoid situations such as obstructed sliding of the positioning post, poor movement of the limiting ball, or bacterial growth due to the accumulation of foreign objects.

[0038] Furthermore, in a preferred embodiment, a protective film is provided between the splint 2 and the support pad 206, and the splint 2 and the support pad 206 are bonded to the protective film. Furthermore, the protective film can completely cover the gap between the splint 2 and the support pad 206 to prevent the patient's fingers, limb extremities, or clothing from accidentally getting caught in the gap between the splint 2 and the support pad 206 and being trapped by the splint 2 or other mechanical parts.

[0039] Furthermore, as a preferred embodiment, the airbag 201 has several inflation chambers inside, and all of the inflation chambers are connected to the slide groove 210.

[0040] Furthermore, as a preferred embodiment, each airbag 201 in this embodiment includes at least three independent inflation chambers, each of which is connected to the groove 210 via a conduit 208. Furthermore, when the patient's limb is placed on the support pad 206, the inflation chambers at different locations can automatically adjust their expansion according to the limb's contour. This helps eliminate the "bulging in the middle and hollow at the edges" fitting defect of traditional integral airbags. For irregular parts of the limb, multiple inflation chambers can be adjusted by local pressure to adapt to joint protrusions or depressions, avoiding insufficient fit between the airbag 201 and the limb.

[0041] Furthermore, as a preferred embodiment, the surface of the support pad 206 is provided with a plurality of ventilation holes. These ventilation holes effectively prevent patients from experiencing stuffiness and discomfort due to prolonged contact with the support pad 206, thereby improving patient comfort.

[0042] Furthermore, in a preferred embodiment, an elastic membrane is provided inside the side groove 211, and the elastic membrane is bonded to the inner wall of the side groove 211. Furthermore, when the unlocking mechanism pushes the positioning post 104 back to its original position, the limiting ball 109 needs to retract from the limiting hole 110 into the arc-shaped groove 111. At this time, the elastic membrane can provide a continuous and gentle thrust along the movement path of the limiting ball 109 by virtue of its own elastic deformation capability, ensuring that the limiting ball 109 completely disengages from the side groove 211 and enters the limiting hole 110. This helps to avoid situations where the limiting ball 109 gets stuck at the edge of the side groove 211 due to mechanical friction, dust jamming, or processing errors.

[0043] The working principle of this invention is as follows: Before use, medical staff can select a suitable fixing slot 101 according to the patient's height and body shape. Then, the cover plate is slid to cover the remaining unused fixing slots 101, and the base 3 is placed into the predetermined fixing slot 101. Then, the patient can lie flat on each support pad 206 with their head, torso, and limbs respectively. Specifically, taking the lower leg as an example: when the patient's lower leg is placed on the support pad 206, the weight of the patient's lower leg can drive the support pad 206 to sink downward, thereby driving the movable block 205 to move down along the slide 210. During the downward movement of the movable block 205, the second connecting rod 204 moves downward. The movement of the second connecting rod 204 will drive the crank 203. Rotation causes crank 203 to rotate, causing clamp 2 to deflect and retract towards the lower leg until airbag 201 is in contact with the side of the lower leg. As movable block 205 continues to move downward under gravity, the pressure between airbag 201 and the lower leg gradually increases. Since airbag 201 is connected to slide groove 210, air inside airbag 201 is discharged into slide groove 210. At the same time, movable block 205 continuously compresses the air in slide groove 210 during its downward movement, thereby increasing the air pressure in slide groove 210. This increased air pressure acts on piston 108, causing piston 108 to move downward, driving positioning pin 104 to move downward until the air pressure change in slide groove 210 exceeds a preset threshold. Simultaneously, one of the... When the side groove 211 is aligned with the limiting hole 110, the limiting ball 109 will be squeezed into the limiting hole 110 and the side groove 211 by the squeezing action of the inner wall of the arc groove 111, thus fixing the cylinder 209 and the outer shaft 107. After the limiting ball 109 leaves the arc groove 111, the positioning post 104 will continue to move downward a short distance under the action of air pressure until it is misaligned with the limiting hole 110. Since the arc groove 111 and the limiting hole 110 are not directly opposite each other at this time, the limiting ball 109 can no longer enter the arc groove 111. When unlocking is required, simply move the pad 105 so that the pad 105 is inserted into the groove 102, and make the lower end of the positioning post 104 align with the inclined surface of the pad 105. When contact is made, the positioning post 104 can slide upward along the inclined surface of the pad 105 by pushing the pad 105, thereby lifting the positioning post 104 upward until the arc groove 111 is aligned with the limiting hole 110 again. At this time, the limiting ball 109 moves into the limiting hole 110 and the arc groove 111 under the action of the elastic membrane. At this time, the patient lifts the lower leg upward, which can push the splint 2 to both sides. The splint 2 deflects and opens outward, which can drive the second connecting rod 204 to move upward. The upward movement of the second connecting rod 204 can drive the movable block 205, the cylinder 209 and the support pad 206 to move upward until the lower leg is completely separated from the splint 2, completing the reduction. The patient's lower leg can then leave between the two splints 2.

[0044] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A body positioning device for radiological examinations, characterized in that, include: The system comprises a bed frame, a limiting mechanism, an unlocking mechanism, and several fixing units. The limiting mechanism, the unlocking mechanism, and the fixing units are all mounted on the bed frame. The limiting mechanism and the unlocking mechanism cooperate with the fixing units. Each fixing unit includes: a clamping plate, a first connecting rod, a second connecting rod, a crank, a movable block, a cylinder, and a base. The base has a movable groove, and the cylinder is disposed within the movable groove. The upper end of the cylinder is connected to the movable block. The second connecting rods are symmetrically arranged on both sides of the movable block. One end of the second connecting rod is rotatably connected to the movable block, and the other end is rotatably connected to one end of the crank. The other end of the crank is rotatably connected to the clamping plate. One end of the first connecting rod is rotatably connected to the clamping plate, and the other end is connected to the base. The upper end is rotatably connected, and the bed body has several fixed grooves. The base is slidably disposed in the fixed grooves. The limiting mechanism includes: a positioning column, an outer shaft, a piston, and a limiting ball. The bottom wall of the fixed groove has a groove, the cylinder has a sliding groove, and the side wall of the sliding groove has a side groove. The lower end of the positioning column is slidably disposed in the groove, and the upper end of the positioning column extends into the sliding groove. The outer shaft is disposed between the positioning column and the cylinder, and the lower end of the outer shaft is fixedly connected to the bottom wall of the fixed groove. The piston is slidably disposed in the sliding groove and connected to the upper end of the positioning column. The outer shaft has several limiting holes along the circumferential direction. The outer side wall of the positioning column has several arc-shaped grooves, and each arc-shaped groove is provided with a limiting ball. The limiting ball is operably engaged with the side groove. It also includes: a support pad and an airbag, wherein the support pad is connected to the upper end of the movable block, the airbag is disposed on the side of the two clamping plates that are close to each other, and the airbag is connected to the sliding groove.

2. The body positioning device for radiological examinations according to claim 1, characterized in that, The unlocking mechanism includes: a pad, an unlocking groove is provided on the side wall of the groove, the pad is slidably disposed in the unlocking groove and the groove, the end of the pad near the groove has an inclined surface, and the lower end of the positioning post can be operably slid along the inclined surface.

3. The body positioning device for radiological examinations according to claim 1, characterized in that, A slot is provided on the side wall of the fixing groove, and a cover plate is slidably disposed in the slot.

4. The body positioning device for radiological examinations according to claim 1, characterized in that, A protective film is provided between the clamping plate and the support pad.

5. The body positioning device for radiological examinations according to claim 1, characterized in that, The airbag has several inflation chambers inside, and each of the inflation chambers is connected to the slide groove.

6. The body positioning device for radiological examinations according to claim 1, characterized in that, The surface of the support pad is provided with several ventilation holes.

7. The body positioning device for radiological examinations according to claim 1, characterized in that, An elastic membrane is provided inside the side groove.

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