CT bed arm fixing device and CT equipment

Abstract

The present invention relates to an arm fixing device for a CT bed and a CT device. The arm fixing device for a CT bed comprises a fixing part, a supporting assembly and an arm support. The fixing part comprises a pressing plate for being placed in the middle position of the CT bed and a mounting plate for being placed on the side position of the CT bed. The pressing plate is in an arc shape matching the middle position of the CT bed. The mounting plate is connected to the side of the pressing plate. One end of the supporting assembly is connected to the mounting plate, and the other end of the supporting assembly is connected to the arm support. The arm support is suspended above the pressing plate. The patient lies in the middle position of the CT bed and presses the pressing plate under the body. The arm is placed on the arm support suspended above the pressing plate, so that the arm is fixed to the patient's chest area, which does not affect the CT scan. The arm is in a relatively relaxed state. The patient's gravity is used to fix the arm fixing device for the CT bed on the CT bed. The installation and disassembly are convenient and quick.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device auxiliary tools, and in particular to an arm fixing device for a CT bed and CT equipment. Background Art

[0002] During minimally invasive ablation surgery for solid tumors in the CT room, when puncturing the right hypochondrium of the patient, the patient needs to expose the right hypochondrium. Due to the limitation of CT scanning, the patient's right upper limb cannot be abducted. The conventional method is to raise the patient's right upper limb above the head and fix it to the drape on the CT bed with a pliers, or place the right upper limb on the left chest and clamp the cuff with a pliers to fix the upper limb. When the operation is performed in this position, on the one hand, the patient is prone to limb movement, which affects the operation; especially when encountering patients with shoulder arthritis, shoulder trauma history, etc., with limited shoulder abduction and stretching activities, or patients with local anesthesia, long ablation time cannot tolerate this position, and the puncture site cannot be fully exposed, which will affect the effect of ablation treatment. On the other hand, some surgical operations take a long time and require general anesthesia. For example: tumor microwave ablation, tumor cryoablation surgery, tumor irreversible electroporation ablation surgery, etc., when the patient's right upper limb is in hyperextension position for too long (>1h), it is easy to cause brachial plexus strain in the right upper limb, resulting in serious surgical complications.

[0003] Traditional limb support devices are generally locked or clamped on the operating table with fastening screws or limiting structures. Although they can be applied to most operating tables to solve the problem of patient arm placement during surgery, the installation and disassembly process is cumbersome. In addition, due to the limitations of CT room equipment and limited space, limb support devices cannot be installed on CT beds and are therefore difficult to use in CT rooms. Summary of the invention

[0004] Based on this, it is necessary to provide a CT bed arm fixing device and CT equipment to address the problem of patient positioning during treatment in the CT room, which is not only easy to install and disassemble, but also can effectively solve the problem of patient positioning during treatment in the CT room, avoiding affecting surgical operations and injuring patients.

[0005] A CT bed arm fixing device comprises a fixing part, a supporting assembly and an arm support, wherein the fixing part comprises a pressing plate for being placed in the middle position of the CT bed and a mounting plate for being placed on the side position of the CT bed, the pressing plate is in an arc shape matching the middle position of the CT bed, the mounting plate is connected to the side of the pressing plate, one end of the supporting assembly is connected to the mounting plate, and the other end of the supporting assembly is connected to the arm support, and the arm support is suspended above the pressing plate.

[0006] In one embodiment, the support assembly includes a first rod and a universal mechanism, one end of the first rod is rotatably connected to the mounting plate, and the other end of the first rod is rotatably connected to the arm support through the universal mechanism.

[0007] In one embodiment, the universal mechanism includes a fixing part, a locking part, a ball joint and a limiter, the top end of the fixing part is connected to the arm support, the bottom end of the fixing part is provided with a mounting hole, the side wall of the fixing part is provided with a locking hole connected with the mounting hole, the limiter is provided with a penetrating ball head hole, the rod end of the ball joint passes through the ball head hole and extends into the mounting hole and the ball head end of the ball joint is limited in the ball head hole, the locking part penetrates into the locking hole to lock the rod end of the ball joint to the fixing part, a limiting part is provided at one end of the first rod, the side surface of the limiting part is provided with an external thread, the end face of the limiting part is provided with an arc-shaped groove, the limiter is provided with an internal thread, the limiting part is locked to the limiter by the cooperation of the external thread and the internal thread, and the ball head end and the groove have a tight state and a loose state.

[0008] In one embodiment, the universal mechanism further includes a first limiting washer, which is sleeved on the limiting portion, and the first limiting washer can be compressed or loosened during the threaded cooperation between the limiter and the limiting portion.

[0009] In one embodiment, the support assembly further includes a second rod and a locking rod, one end of the second rod is connected to the mounting plate, the other end of the second rod is provided with a joint portion, the end of the first rod away from the universal mechanism is provided with a matching portion, one end of the locking rod passes through the joint portion and extends into the matching portion and is threadedly connected to the matching portion, and the joint portion and the matching portion have a tight state and a loose state.

[0010] In one embodiment, an annular limiting groove is provided on one end face of the joint part, and a limiting block is provided on one end face of the matching part; or a limiting block is provided on one end face of the joint part, and an annular limiting groove is provided on one end face of the matching part, the limiting block is nested and matched with the limiting groove and can rotate relatively, and the axis center line of the limiting groove is the same as the axis center line of the locking rod.

[0011] In one embodiment, the support assembly further includes a second limiting washer, which is sleeved on the limiting block, and the locking rod can tighten or loosen the second limiting washer during threaded engagement with the mating portion.

[0012] In one embodiment, the support assembly further comprises a buffer washer, a countersunk hole is provided on the end surface of the mating portion away from the joint portion, the buffer washer is installed in the countersunk hole, one end of the locking rod threadedly mating with the mating portion is connected to the buffer washer, the joint portion and the mating portion are in a tight fit, and a moving gap is left between the buffer washer and the bottom wall of the countersunk hole; a countersunk groove is provided on the end surface of the joint portion away from the mating portion, a boss is provided on the locking rod, and the boss is limited in the countersunk groove.

[0013] In one of the embodiments, the arm fixing device for the CT bed also includes a mounting seat, a sliding plate and a locking piece. The mounting seat includes an upper plate, a lower plate and a connecting plate connecting the upper plate and the lower plate. The upper plate and the lower plate are arranged relative to each other in an upper and lower spaced relationship. The sliding plate is fixed to the mounting plate and the sliding plate is passed through the upper plate and the lower plate. The mounting seat and the sliding plate can slide relative to each other. Both the upper plate and the lower plate are provided with mounting through holes. One end of the second rod away from the locking rod is passed through the mounting through hole. The connecting plate is provided with a locking through hole. One end of the locking piece passes through the locking through hole and can abut against the sliding plate to make the second rod and the sliding plate close to each other.

[0014] A CT device comprises a CT bed and an arm fixing device for the CT bed, wherein the CT bed comprises a middle position and side positions on both sides of the middle position, the longitudinal section of the middle position is arc-shaped, the pressing plate is placed at the middle position of the CT bed, and the mounting plate is placed on the side positions of the CT bed.

[0015] When the above-mentioned CT bed arm fixing device and CT equipment are used, the pressing plate is placed in the middle position of the CT bed, and the mounting plate is placed on the side position of the CT bed. The patient lies in the middle position of the CT bed and presses the pressing plate under the body. The pressing plate is in an arc shape that matches the middle position of the CT bed, and can be well matched with the arc of the middle position of the CT bed, without affecting the patient's position. The arm is placed on the arm support suspended above the pressing plate, so that the arm is fixed in the patient's chest area, which is easy to pass through the scanning window of the CT machine, and does not affect the CT scan. At the same time, the patient's arm can be in a more relaxed state, protecting the patient's upper limb nerves and avoiding overextension traction and injury to the patient. In addition, the patient's gravity is used to make the CT bed arm fixing device well fixed on the CT bed, and it can be quickly removed from the CT bed when not in use, and directly placed on the CT bed when needed. The installation and disassembly are convenient and quick, and no additional locking device is required. The mounting plate extends outward from the side of the pressing plate and is placed on the side position of the CT bed. The arm support is suspended above the pressing plate, which can meet the use of the limited space of the CT room; the structure is simple and can be promoted and used in clinical practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic structural diagram of a CT bed arm fixing device according to an embodiment of the present application;

[0017] Figure 2 for Figure 1 Schematic diagram of the split at A in the middle;

[0018] Figure 3 for Figure 1 The cross-sectional diagram at A in the middle;

[0019] Figure 4 for Figure 1 Schematic diagram of the split at B in the middle;

[0020] Figure 5 for Figure 1 The cross-sectional diagram at B in the middle;

[0021] Figure 6 for Figure 1 Enlarged schematic diagram of point C in the middle.

[0022] Description of reference numerals:

[0023] 10. fixing member; 110. pressing plate; 120. mounting plate; 20. supporting assembly; 210. first rod; 212. limiting portion; 2122. groove; 214. matching portion; 2142. limiting block; 2144. countersunk hole; 2146. moving gap; 220. universal mechanism; 221. fixing portion; 222. locking portion; 223. ball joint; 2232. rod end; 2234. ball end; 224. limiting device; 2242. ball hole; 225. first limiting pad ring; 230, second rod; 232, joint; 2322, limit groove; 2324, sink groove; 240, locking rod; 242, boss; 250, second limit washer; 260, buffer washer; 270, protective cover; 280, rotating rod; 290, screw; 30, arm support; 40, mounting seat; 402, mounting through hole; 410, upper plate; 420, lower plate; 430, connecting plate; 50, sliding plate; 60, locking piece; 70, support rod; 80, screw. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] Traditional limb support devices are generally locked to the operating bed with parts such as screws. On the one hand, installation and disassembly are cumbersome. On the other hand, since CT beds are generally made of low-density materials, locking traditional limb support devices to the CT bed with screws can easily cause damage to the CT bed, resulting in traditional limb support devices being unable to be used on CT beds.

[0031] See also Figure 1 The arm fixing device for a CT bed provided in one embodiment of the present invention comprises a fixing member 10, a supporting assembly 20 and an arm support 30. The fixing member 10 comprises a pressing plate 110 for being placed in the middle of the CT bed and a mounting plate 120 for being placed on the side of the CT bed.

[0032] Further, the pressing plate 110 is in an arc shape that matches the middle position of the CT bed. The mounting plate 120 is connected to the side of the pressing plate 110. The mounting plate 120 is a straight plate that matches the side position of the CT bed. One end of the support assembly 20 is connected to the mounting plate 120, and the other end of the support assembly 20 is connected to the arm support 30, and the arm support 30 is suspended above the pressing plate 110. According to requirements, the mounting plate 120 can be set on one side or both sides of the pressing plate 110; correspondingly, the support assembly 20 and the arm support 30 can be connected to the mounting plate 120 on either side to meet the requirements of single-arm or double-arm support. Optionally, the mounting plate 120 is formed by extending outward from the side of the pressing plate 110, and the width of the mounting plate 120 is less than or equal to the width of the side position of the CT bed. The fixing member 10 is a material that does not affect CT scanning imaging, such as carbon fiber.

[0033] When in use, the pressing plate 110 is placed in the middle of the CT bed, the mounting plate 120 is placed on the side of the CT bed, and the patient lies in the middle of the CT bed and presses the pressing plate 110 under the body. The pressing plate 110 is in an arc shape that matches the middle of the CT bed, and can be well matched with the arc of the middle of the CT bed, without affecting the position of the patient, ensuring that the patient lies comfortably on the CT bed, and stably fixes the pressing plate 110 under the patient, and puts the arm on the arm support 30 suspended above the pressing plate 110, so that the arm is fixed on the patient's chest area, which is easy to pass through the scanning window of the CT machine, without affecting the CT scanning, and at the same time, the patient's arm can be in a relatively relaxed state, protecting the patient's upper limb nerves and avoiding overextension traction and injury to the patient. In addition, the patient's gravity is used to make the CT bed arm fixing device well fixed on the CT bed, and it can be quickly removed from the CT bed when not in use, and directly placed on the CT bed when needed. The installation and disassembly are convenient and quick, and no additional locking device is required. The structure is simple and can be promoted and used in clinical practice.

[0034] Furthermore, the mounting plate 120 extends outward from the side of the pressing plate 110 and rests on the side of the CT bed, and the arm support 30 is suspended above the pressing plate 110. The entire device is in the plane where the orthographic projection of the CT bed is located, and will not interfere with the equipment in the CT room, thereby meeting the use of the limited space of the CT room.

[0035] Figure 1 The figure shows that the mounting plate 120 is set on one side. The patient lies on the CT bed with his feet facing inward and his head facing outward, and presses the pressing plate 110 between the lower back and the CT bed. The support assembly 20 is located near the left ear, and the right arm is raised and placed on the arm rest 30 to hang in front of the chest, so that the patient's right upper limb is in a relatively relaxed state. Optionally, the arm rest 30 is a long arc-shaped plate lined with cotton pads and wrapped with polyurethane material. During the operation, the patient's arm is fixed to the arm rest 30 by a restraint belt.

[0036] Reference Figure 1-3 In one embodiment, the support assembly 20 includes a first rod 210 and a universal mechanism 220. One end of the first rod 210 is rotatably connected to the mounting plate 120, and the other end of the first rod 210 is rotatably connected to the arm support 30 through the universal mechanism 220. The arm support 30 is connected to the fixing member 10 and is suspended in the air through the first rod 210. By adjusting the angle of the first rod 210 and adjusting the angle and position of the arm support 30 through the universal mechanism 220, the arm support 30 can meet the use requirements of different patients. Optionally, the first rod 210 can be rotatably connected to the mounting plate 120 through a hinge seat, a pan / tilt head and other mechanisms.

[0037] Specifically, refer to Figure 2 , 3In one embodiment, the universal mechanism 220 includes a fixing portion 221, a locking portion 222, a ball joint 223 and a stopper 224. The top of the fixing portion 221 is connected to the arm rest 30. The top of the fixing portion 221 is fixedly connected to the bottom of the arm rest 30. A mounting hole is provided at the bottom of the fixing portion 221, and a locking hole connected to the mounting hole is provided on the side wall of the fixing portion 221. A nut that matches the locking portion 222 can be welded outside the locking hole so that the locking portion 222 is threadedly connected to the fixing portion 221.

[0038] Furthermore, the stopper 224 is provided with a through ball hole 2242. One end of the ball joint 223 is a rod end 2232, and the other end is a ball end 2234. The outer diameter of the rod end 2232 is small, and the outer diameter of the ball end 2234 is large. The outer diameter of the ball end 2234 is larger than the maximum inner diameter of the ball hole 2242, and the outer diameter of the rod end 2232 is smaller than the maximum inner diameter of the ball hole 2242. The rod end 2232 of the ball joint 223 first passes through the ball hole 2242, and then the rod end 2232 extends into the mounting hole, and the locking portion 222 penetrates into the locking hole to lock the rod end 2232 of the ball joint 223 on the fixing portion 221; while the ball end 2234 of the ball joint 223 cannot pass through the ball hole 2242, and is therefore limited in the ball hole 2242. The rod end 2232 is provided with a through hole for the locking portion 222 to pass through, and one end of the locking portion 222 can extend into the through hole of the rod end 2232 to be connected with the rod end 2232 .

[0039] Furthermore, a limiting portion 212 is provided at one end of the first rod 210, an external thread is provided on the side of the limiting portion 212, an arc-shaped groove 2122 is provided on the end face of the limiting portion 212, an internal thread is provided on the limiter 224, the limiting portion 212 is locked on the limiter 224 by the cooperation between the external thread and the internal thread, and the ball head end 2234 and the groove 2122 have a tight state and a loose state. When the ball end 2234 and the groove 2122 are in a close contact state, the relative position of the ball joint 223 and the limiter 224 is fixed, and the two cannot rotate, so that the arm support 30 is in a fixed position; rotate the limiter 224 to make the limiter 224 relatively away from the limiting part 212, and the ball end 2234 and the groove 2122 are in a loose state. At this time, the ball joint 223 can be rotated in the ball hole 2242 of the limiter 224 to adjust the angle and position of the arm support 30 to meet the needs of different patients. After the adjustment is completed, rotate the limiter 224 in the opposite direction to make the limiter 224 relatively close to the limiting part 212 until the ball end 2234 and the groove 2122 are in a close contact state. Figure 3In this embodiment, the limiting portion 212 is a part of the first rod 210, and the limiting portion 212 and the first rod 210 are an integral structure. Optionally, in other embodiments, the limiting portion 212 and the first rod 210 are separate structures. The limiting portion 212 and the first rod 210 can move relative to each other, and the spacing between the limiting portion 212 and the stopper 224 can be adjusted by rotating the limiting portion 212, so as to realize the switching between the tight state and the loose state of the ball head end 2234 and the groove 2122.

[0040] Optionally, in one embodiment, the universal mechanism 220 further includes a first limiting washer 225, which is sleeved on the limiting portion 212, and the limiter 224 can compress or loosen the first limiting washer 225 during the threaded cooperation with the limiting portion 212. The limiting portion 212 has a stop shoulder, and the first limiting washer 225 is blocked at the stop shoulder. The limiter 224 and the limiting portion 212 are relatively close to each other to compress the first limiting washer 225, and the ball head end 2234 and the groove 2122 are in a close contact state, and the limiter 224 and the limiting portion 212 are relatively far away from each other to loosen the first limiting washer 225, and the ball head end 2234 and the groove 2122 are in a loose state.

[0041] Further, refer to Figure 1 , 45. In one embodiment, the support assembly 20 further includes a second rod 230 and a locking rod 240. One end of the second rod 230 is connected to the mounting plate 120, and the other end of the second rod 230 is provided with a joint portion 232. One end of the first rod 210 away from the universal mechanism 220 is provided with a matching portion 214, one end of the locking rod 240 passes through the joint portion 232 and extends into the matching portion 214 and is threadedly connected to the matching portion 214, and the joint portion 232 and the matching portion 214 have a tight state and a loose state. The joint portion 232 is a through shape. The matching portion 214 is a through shape. The end of the locking rod 240 extending into the matching portion 214 is provided with a thread, and the inner wall of the matching portion 214 is also provided with a thread. The threads of the two rotate relatively close to each other so that the joint portion 232 and the matching portion 214 are in a close contact state, and the relative position of the first rod 210 and the second rod 230 is fixed; the locking rod 240 and the matching portion 214 threads rotate relatively far away so that the joint portion 232 and the matching portion 214 are in a loose state, and the second rod 230 can rotate relative to the first rod 210 to adjust the angle and position of the arm support 30 to better meet the needs of different patients. Optionally, the locking rod 240 is connected to a rotating rod 280, and the locking rod 240 is driven to rotate by applying force to the rotating rod 280 to achieve the switching between the close contact state and the loose state between the joint portion 232 and the matching portion 214. A through hole is provided in the locking rod 240 in the radial direction, and the rotating rod 280 is inserted into the through hole so that the rotating rod 280 and the locking rod 240 are in a vertical state, which facilitates the application of force to push the rotating rod 280 to drive the locking rod 240 to rotate.

[0042] Further, refer to Figure 4 , 5 In one embodiment, an annular limiting groove 2322 is provided on one end face of the joint part 232, and a limiting block 2142 is provided on one end face of the matching part 214. Or in other embodiments, an annular limiting groove 2322 is provided on one end face of the joint part 232, and an annular limiting groove 2322 is provided on one end face of the matching part 214. The limiting block 2142 is nested and matched with the limiting groove 2322 and can rotate relatively. The axis of the limiting groove 2322 is the same as the axis of the locking rod 240. Through the cooperation of the limiting block 2142 and the limiting groove 2322, the relative displacement between the joint part 232 and the matching part 214 is made smoother. The limiting block 2142 can be set as an annular protrusion. The limiting block 2142, the limiting groove 2322 and the rotating rod 280 are kept coaxially arranged.

[0043] Furthermore, in one embodiment, the support assembly 20 further includes a second limiting washer 250, which is sleeved on the limiting block 2142, and the second limiting washer 250 can be compressed or loosened during the threaded cooperation between the locking rod 240 and the matching portion 214. When the joint portion 232 and the matching portion 214 are close to each other, the second limiting washer 250 is compressed, and the position of the first rod 210 is fixed; when the joint portion 232 and the matching portion 214 are far away from each other, the second limiting washer 250 is loosened, and the first rod 210 can rotate relative to the second rod 230.

[0044] Furthermore, in one embodiment, the support assembly 20 further includes a buffer washer 260, a countersunk hole 2144 is provided on the end surface of the mating portion 214 away from the joint portion 232, the buffer washer 260 is installed in the countersunk hole 2144, and one end of the locking rod 240 threadedly mated with the mating portion 214 is connected to the buffer washer 260. Figure 4 , 5 The locking rod 240 is connected to the buffer washer 260 by a screw 290. In other embodiments, the locking rod 240 can also be connected to the buffer washer 260 by a rivet connection part. Optionally, the screw 290 is covered with a protective cover 270, and the protective cover 270 is nested on the matching part 214 to play a dustproof and protective role. Further, the joint part 232 and the matching part 214 are in a close contact state, and a moving gap 2146 is left between the buffer washer 260 and the bottom wall of the counterbore 2144. The locking rod 240 rotates to drive the matching part 214 to move in a direction away from the joint part 232, that is, to move in a direction close to the buffer washer 260. When the bottom wall of the counterbore 2144 of the matching part 214 abuts against the buffer washer 260, the matching part 214 stops moving, limiting the moving distance of the matching part 214, preventing the matching part 214 from moving too much or too little, and making the matching part 214 and the joint part 232 in a loose state at a suitable distance. Further, a counterbore 2324 is provided on the end surface of the joint part 232 away from the matching part 214, and a boss 242 is provided on the locking rod 240, and the boss 242 is limited in the counterbore 2324. The locking rod 240 is limited in the recessed groove 2324 by the boss 242, and the locking rod 240 rotates relative to the joint part 232 without moving. During the rotation of the locking rod 240, the matching part 214 threadedly connected thereto moves closer to or away from the joint part 232, thereby realizing the switching between the close contact state and the loose state. In other embodiments, the recessed groove 2324 may not be provided on the joint part 232, and the boss 242 of the locking rod 240 directly abuts against the end surface of the joint part 232 to be limited in movement.

[0045] Reference Figure 1 , 6In one embodiment, the arm fixing device for a CT bed further includes a mounting seat 40, a sliding plate 50 and a locking piece 60. The mounting seat 40 includes an upper plate 410, a lower plate 420 and a connecting plate 430 connecting the upper plate 410 and the lower plate 420, and the upper plate 410 and the lower plate 420 are arranged in a relative spacing from top to bottom. Specifically, the upper plate 410, the connecting plate 430 and the lower plate 420 are integrally formed to form a "U"-shaped structure. Further, the sliding plate 50 is fixed on the mounting plate 120, and the sliding plate 50 is inserted between the upper plate 410 and the lower plate 420. Optionally, the sliding plate 50 is connected to the mounting plate 120 through two support rods 70, and a support rod 70 is welded at the bottom of both ends of the sliding plate 50, and a through hole is correspondingly opened on the mounting plate 120, and the screw 80 passes through the through hole to connect with the support rod 70, and the support rod 70 is fixed to the mounting plate 120. The sliding plate 50 is connected to the mounting plate 120 through the support rod 70, and a certain distance is formed between the mounting plate 120 and the sliding plate 50. The mounting seat 40 is sleeved on the sliding plate 50, the lower plate 420 is located between the distance between the sliding plate 50 and the mounting plate 120, and the upper plate 410 is located above the sliding plate 50. The mounting seat 40 and the sliding plate 50 can slide relative to each other. The sliding plate 50 is extended along the length direction of the mounting plate 120, so that the mounting seat 40 can move along the length direction of the sliding plate 50.

[0046] Furthermore, both the upper plate 410 and the lower plate 420 are provided with a mounting through hole 402, and one end of the second rod 230 away from the locking rod 240 is inserted into the mounting through hole 402. Figure 6 , the second rod 230 is limited in the mounting through hole 402, and the distance between the second rod 230 and the sliding plate 50 is adjustable. Further, a locking through hole is provided on the connecting plate 430, and one end of the locking member 60 passes through the locking through hole and can abut against the sliding plate 50 to make the second rod 230 and the sliding plate 50 close. The locking member 60 rotates and moves in the direction where the sliding plate 50 is located, and its end can abut against the sliding plate 50. As the locking member 60 continues to move, the distance between the sliding plate 50 and the second rod 230 is continuously reduced until they are close, so that the second rod 230 is fixed on the sliding plate 50; when the position of the second rod 230 needs to be adjusted, the locking member 60 is rotated in the opposite direction, and the second rod 230 and the mounting seat 40 are moved to the desired position along the sliding plate 50, and then the locking member 60 is rotated to fix the second rod 230.

[0047] Reference Figure 1Another embodiment of the present application provides a CT device, including a CT bed and the arm fixing device for the CT bed. The CT bed includes a middle position and side positions on both sides of the middle position, the longitudinal section of the middle position is arc-shaped, the pressing plate 110 is placed in the middle position of the CT bed, and the mounting plate 120 is placed on the side position of the CT bed. Furthermore, the CT device also includes a ring-shaped CT machine, and the CT bed can be inserted into the CT machine.

[0048] When in use, the patient lies flat on the CT bed, and the pressing plate 110 is stably fixed under the body. The arm can be placed on the arm support 30 suspended above the pressing plate 110, so that the arm is fixed in the chest area, which is easy to pass through the scanning window of the CT machine, does not affect the CT scanning, and at the same time can make the arm in a relatively relaxed state, protect the upper limb nerves, and avoid overextension traction injury. The patient's gravity is used to make the CT bed well fixed on the CT bed with the arm fixing device. When it is not needed, it can be quickly removed from the CT bed, and when it is needed, it can be directly placed on the CT bed. The installation and disassembly are convenient and quick, and no additional locking device is required. The mounting plate 120 extends outward from the side of the pressing plate 110 and rests on the side of the CT bed. The arm support 30 is suspended above the pressing plate 110. The overall CT room equipment is in the plane where the positive projection of the CT bed is located, and will not interfere with the CT machine, which can meet the use of the limited space of the CT room.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A CT bed arm fixing device, characterized in that: It comprises a fixing part, a supporting assembly and an arm support, wherein the fixing part comprises a pressing plate for being placed in the middle of the CT bed and a mounting plate for being placed on the side of the CT bed, the pressing plate is in an arc shape matching the middle of the CT bed, the mounting plate is connected to the side of the pressing plate, one end of the supporting assembly is connected to the mounting plate, and the other end of the supporting assembly is connected to the arm support, and the arm support is suspended above the pressing plate; The support assembly includes a first rod and a universal mechanism, one end of the first rod is rotatably connected to the mounting plate, and the other end of the first rod is rotatably connected to the arm support through the universal mechanism; The universal mechanism comprises a fixing part, a locking part, a ball joint and a limiter, the top end of the fixing part is connected to the arm support, the bottom end of the fixing part is provided with a mounting hole, the side wall of the fixing part is provided with a locking hole connected with the mounting hole, the limiter is provided with a penetrating ball head hole, the rod end of the ball joint passes through the ball head hole and extends into the mounting hole, and the ball head end of the ball joint is limited in the ball head hole, the locking part penetrates into the locking hole to lock the rod end of the ball joint on the fixing part, one end of the first rod is provided with a limiting part, the side surface of the limiting part is provided with an external thread, the end surface of the limiting part is provided with an arc-shaped groove, the limiter is provided with an internal thread, the limiting part is locked on the limiter through the cooperation of the external thread and the internal thread, and the ball head end and the groove have a tight state and a loose state; The arm fixing device for the CT bed also includes a mounting seat and a sliding plate. The mounting seat includes an upper plate, a lower plate and a connecting plate connecting the upper plate and the lower plate. The upper plate and the lower plate are arranged with a relative interval up and down. The sliding plate is fixed on the mounting plate and the sliding plate is inserted between the upper plate and the lower plate. The mounting seat and the sliding plate can slide relative to each other.

2. The CT bed arm fixing device according to claim 1, characterized in that: The universal mechanism further comprises a first limiting washer, which is sleeved on the limiting portion. The first limiting washer can be compressed or loosened during the threaded cooperation between the limiter and the limiting portion.

3. The CT bed arm fixing device according to claim 1, characterized in that: The support assembly also includes a second rod and a locking rod, one end of the second rod is connected to the mounting plate, the other end of the second rod is provided with a joint portion, the end of the first rod away from the universal mechanism is provided with a matching portion, one end of the locking rod passes through the joint portion and extends into the matching portion and is threadedly connected to the matching portion, and the joint portion and the matching portion have a tight state and a loose state.

4. The CT bed arm fixing device according to claim 3, characterized in that: One end face of the joint part is provided with an annular limiting groove, and one end face of the matching part is provided with a limiting block; or one end face of the joint part is provided with a limiting block, and one end face of the matching part is provided with an annular limiting groove, the limiting block is nested and matched with the limiting groove and can rotate relatively, and the axis center line of the limiting groove is the same as the axis center line of the locking rod.

5. The CT bed arm fixing device according to claim 4, characterized in that: The support assembly further includes a second limiting washer, which is sleeved on the limiting block. The locking rod can tighten or loosen the second limiting washer during the threaded engagement between the locking rod and the engagement portion.

6. The CT bed arm fixing device according to claim 4, characterized in that: The support assembly also includes a buffer washer, a countersunk hole is provided on the end surface of the matching part away from the joint part, the buffer washer is installed in the countersunk hole, one end of the locking rod that is threadedly engaged with the matching part is connected to the buffer washer, the joint part and the matching part are in a tight state, and a moving gap is left between the buffer washer and the bottom wall of the countersunk hole; a countersunk groove is provided on the end surface of the joint part away from the matching part, and a boss is provided on the locking rod, and the boss is limited in the countersunk groove.

7. The CT bed arm fixing device according to any one of claims 3 to 6, characterized in that: It also includes a locking piece, and both the upper plate and the lower plate are provided with mounting holes, one end of the second rod away from the locking rod is inserted into the mounting hole, and a locking hole is provided on the connecting plate. One end of the locking piece passes through the locking hole and can abut against the sliding plate to make the second rod and the sliding plate close to each other.

8. A CT device, characterized in that: It comprises a CT bed and the arm fixing device for a CT bed according to any one of claims 1 to 7, wherein the CT bed comprises a middle position and side positions on both sides of the middle position, the longitudinal cross-section of the middle position is arc-shaped, the pressing plate is placed at the middle position of the CT bed, and the mounting plate is placed on the side positions of the CT bed.

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