An arm immobilization device

Abstract

The utility model discloses a kind of arm fixing devices, specifically related to medical instrument technical field, to solve the technical problem that current arm fixing device cannot make elbow joint rotate within a certain range. The utility model includes first fixed band and second fixed band, first fixed band is equipped with first support plate, second fixed band is equipped with second support plate, first support plate one end is equipped with sleeve, second support plate one end is equipped with rotating column that rotates and is sleeved in the inside of sleeve, sleeve one end is equipped with sector opening, sleeve one end is sequentially overlapped and axially rotatably connected with first limit rod and second limit rod;Rotating column one side has limit block, limit block is arranged between first limit rod and second limit rod, and locking assembly is equipped between first limit rod and second limit rod and sleeve. The device is adjusted by adjusting mechanism to adjust the rotation range of angle between first support plate and second support plate, so that the elbow joint of patient rotates within a certain angle range.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an arm fixation device. Background Technology

[0002] Hemodialysis is an important treatment for chronic renal failure. After arteriovenous fistula puncture, keeping the arm stationary during hemodialysis is crucial. This is mainly achieved by limiting the flexion and extension of the elbow joint to prevent displacement of the puncture needle or tubing.

[0003] Currently, devices used to fix the elbow joint during dialysis can only completely restrict the flexion and extension movements of the elbow joint. This is suitable for patients whose puncture point is in the elbow area, because elbow joint movement will cause the puncture point to shift. However, for patients whose puncture point is not in the elbow area, prolonged complete immobility can lead to arm muscle fatigue, resulting in discomfort and affecting the patient's quality of life. Therefore, its practicality needs to be improved.

[0004] Therefore, there is an urgent need to develop an arm fixation device that allows patients whose puncture point is not in the elbow area to move their elbow joint within a certain range of angles, thereby ensuring that the puncture needle does not fall out, reducing patient fatigue and discomfort, and improving the patient's dialysis experience and quality of life. Utility Model Content

[0005] This invention provides an arm fixation device that can completely restrict the flexion and extension of the elbow joint for patients whose puncture point is in the elbow area, and allows the elbow joint to move within a certain angle range for patients whose puncture point is not in the elbow area.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An arm fixation device includes a first support plate and a second support plate. The first support plate has a first fixation strap for fixing the patient's upper arm, and the second support plate has a second fixation strap for fixing the patient's wrist. One end of the first support plate has a sleeve, and the side of one end of the second support plate has a rotating column rotatably fitted inside the sleeve. One end of the sleeve has a fan-shaped opening, and the sleeve has a first limiting rod and a second limiting rod rotatably connected around the end with the fan-shaped opening. The rotating column has a limiting block on the side near the fan-shaped opening, and the limiting block is disposed between the first limiting rod and the second limiting rod. A locking assembly is provided between the first limiting rod, the second limiting rod, and the sleeve.

[0008] Preferably, an angle locking mechanism is provided between the sleeve and the rotating column. The locking mechanism includes first limiting teeth evenly distributed around the outside of the rotating column. A first locking rod is slidably connected inside the sleeve. One end of the first locking rod is provided with a first locking tooth that matches the first limiting teeth. A first compression spring is sleeved on the outside of the first locking rod. One end of the first compression spring is fixedly connected to the sleeve, and the other end of the first compression spring is fixedly connected to the first locking rod. The other end of the first locking rod passes through the outside of the sleeve and is connected to a lifting component.

[0009] Preferably, the lifting assembly includes an abutment plate fixedly connected to the end of the first locking rod, and a first cam rotatably connected to the sleeve. The first cam is disposed between the abutment plate and the sleeve, the axis of rotation of the first cam is parallel to the tangent of the cross-section of the sleeve, and the outer edge of the first cam abuts against the end face of the abutment plate.

[0010] Preferably, a lever is provided on the outer side of the first cam.

[0011] Preferably, the locking assembly includes a second limiting tooth disposed around the outside of the sleeve and evenly distributed at the fan-shaped opening position; the outer ends of the first limiting rod and the second limiting rod are provided with a mounting plate extending to the outside of the second limiting tooth, a second locking rod is slidably connected through the mounting plate, one end of the second locking rod passes through the inside of the mounting plate and is provided with a second locking tooth that meshes with the second limiting tooth, the other end of the second locking rod is provided with an arc-shaped plate, a second compression spring is provided between the bottom end of the arc-shaped plate and the mounting plate, and the top surface of the arc-shaped plate abuts against a second cam that is rotatably connected to the mounting plate.

[0012] Preferably, the top surface of the fan-shaped opening is provided with a scale.

[0013] Preferably, the sides of the first limiting rod and the second limiting rod are provided with mating grooves that cooperate with the limiting block, and the width of the mating grooves is equal to half the width of the limiting block.

[0014] Preferably, the second support plate is provided with an auxiliary fixing strap near its outer end.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. This utility model is worn on the patient's body by means of a first fixing strap and a second fixing strap, and the upper arm and forearm are supported by the first support plate and the second support plate.

[0017] 2. For patients whose puncture point is in the elbow area, this device adjusts the angle between the first support plate and the second support plate by rotating the sleeve and the rotating column, and locks the angle by the locking mechanism, thereby fixing the angle of the patient's elbow.

[0018] 3. For patients whose puncture point is not in the elbow area, this device adjusts the range of rotation of the angle between the first support plate and the second support plate through the adjustment mechanism, so that the patient's elbow joint can rotate within the angle range, avoiding fatigue and discomfort caused by the patient's arm being fixed for a long time. Attached Figure Description

[0019] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a front view of an arm fixing device according to the present invention;

[0021] Figure 2 This is a partially enlarged view of the sleeve and rotating column in this utility model;

[0022] Figure 3 This is a schematic diagram of the locking mechanism in this utility model when locked;

[0023] Figure 4 This is a schematic diagram of the locking mechanism in this utility model during unlocking;

[0024] Figure 5 This is a schematic diagram of the locking component in this utility model.

[0025] Wherein: 1-First fixing band, 2-Second fixing band, 3-First support plate, 4-Second support plate, 5-Sleeve, 6-Rotating column, 7-First limiting tooth, 8-First locking rod, 9-First locking tooth, 10-First compression spring, 11-Abutting plate, 12-First cam, 13-Actuating handle, 14-Fan-shaped opening, 15-First limiting rod, 16-Second limiting rod, 17-Limiting block, 18-Matching groove, 19-Second limiting tooth, 20-Mounting plate, 21-Second locking rod, 22-Second locking tooth, 23-Second compression spring, 24-Second cam, 25-Scale, 26-Auxiliary fixing band, 27-Arc-shaped plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only partial embodiments of this application, not the entire application. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is 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 orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] The following is combined with Figures 1-5 This utility model will be described in detail.

[0029] An arm fixation device, in some embodiments, such as Figures 1-5 As shown, it includes a first fixing strap 1 for fixing the patient's upper arm and a second fixing strap 2 for fixing the patient's wrist. Multiple first fixing straps 1 and second fixing straps 2 are provided. The first fixing straps 1 and second fixing straps 2 are fixed to the patient by Velcro assembly. The first fixing strap 1 is provided with a first support plate 3, and the second fixing strap 2 is provided with a second support plate 4. The first support plate 3 and the second support plate 4 are rotatably connected. One end of the first support plate 3 is provided with a sleeve 5, and the side of one end of the second support plate 4 is provided with a rotating post 6 that is rotatably fitted inside the sleeve 5. An angle locking mechanism and an adjustment mechanism for limiting the angle rotation range of the second support plate 4 are provided between the sleeve 5 and the rotating post 6.

[0030] In practical use, this invention is worn on the patient using a first fixing strap 1 and a second fixing strap 2. The first fixing strap is used to fix the top of the patient's upper arm, and the second fixing strap is used to fix the forearm at the wrist. A first support plate 3 and a second support plate 4 support the upper arm and forearm. The angle between the first support plate 3 and the second support plate 4 is adjusted by rotating the sleeve 5 and the rotating column 6. When the puncture point of the dialysis tubing is located in the patient's elbow area, the patient's arm cannot perform slight bending movements. This device uses a locking mechanism to lock this angle, thereby completely fixing the patient's arm. When the puncture point is not in the elbow area, the patient's arm can perform slight bending movements. In this case, the adjustment mechanism adjusts the range of rotation of the angle between the first support plate 3 and the second support plate 4, allowing the patient to slightly rotate within this angle range during lying dialysis, thus avoiding arm fatigue.

[0031] In some embodiments, such as Figures 1-4 As shown, the locking mechanism includes first limiting teeth 7 evenly distributed around the outside of the rotating column 6, a first locking rod 8 slidably connected inside the sleeve 5, one end of the first locking rod 8 having a first locking tooth 9 matching the first limiting teeth 7, a first compression spring 10 sleeved on the outside of the first locking rod 8, one end of the first compression spring 10 being fixedly connected to the sleeve 5, and the other end of the first compression spring 10 being fixedly connected to the first locking rod 8; the other end of the first locking rod 8 passes through the outside of the sleeve 5 and is connected to a lifting component.

[0032] In practical use, when it is necessary to adjust the angle between the first support plate 3 and the second support plate 4, the lifting assembly causes the first locking rod 8 to slide and lock within the sleeve 5 against the restoring force of the first compression spring 10. At this time, the first locking tooth 9 at the end of the first locking rod 8 disengages from the first limiting tooth 7 on the outside of the rotating column 6, thereby releasing the lock. At this time, the angle between the first support plate 3 and the second support plate 4 can be adjusted by rotation. When locking, the lifting assembly is readjusted so that the first locking rod 8 slides within the sleeve 5 under the action of the first compression spring 10. At this time, the first locking tooth 9 at the end of the first locking rod 8 engages with the first limiting tooth 7 on the outside of the rotating column 6, thereby completing the locking.

[0033] In some embodiments, such as Figures 1-4As shown, the lifting assembly includes an abutment plate 11 fixedly connected to the end of the first locking rod 8, and a first cam 12 rotatably connected to the sleeve. The first cam 12 is disposed between the abutment plate 11 and the sleeve 5. The axis of rotation of the first cam 12 is parallel to the tangent of the cross-section of the sleeve 5, and the outer edge of the first cam 12 abuts against the end face of the abutment plate 11.

[0034] In practical use, when the first cam 12 is rotated, and the protruding end of the first cam 12 pushes up the abutment plate 11, the first locking rod 8 slides and locks inside the sleeve 5 against the restoring force of the first compression spring 10. At this time, the first locking tooth 9 at the end of the first locking rod 8 disengages from the first limiting tooth 7 on the outside of the rotating column 6, thereby releasing the lock. When the cam is rotated so that the arc end of the first cam 12 abuts against the abutment plate 11, the first locking rod 8 slides inside the sleeve 5 under the action of the first compression spring 10. At this time, the first locking tooth 9 at the end of the first locking rod 8 engages with the first limiting tooth 7 on the outside of the rotating column 6, thereby completing the lock.

[0035] In some embodiments, such as Figures 1-4 As shown, the outer side of the first cam 12 is provided with a lever handle 13.

[0036] In practical use, medical personnel control the rotation of the first cam 12 by using the lever 13, making operation more convenient.

[0037] In some embodiments, such as Figures 1-2 As shown, the adjusting mechanism includes a fan-shaped opening 14 at one end of the sleeve 5. A first limiting rod 15 and a second limiting rod 16 are sequentially overlapped and rotatably connected to the end of the sleeve 5 where the fan-shaped opening 14 is located. The first limiting rod 15 and the second limiting rod 16 rotate around the circumference of the rotating column 6. A limiting block 17 is fixedly provided on the side of the rotating column 6 near the fan-shaped opening 14. The limiting block 17 is located between the first limiting rod 15 and the second limiting rod 16. The sides of the first limiting rod 15 and the second limiting rod 16 are provided with mating grooves 18 that cooperate with the limiting block 17. A locking component is provided between the first limiting rod 15 and the second limiting rod 16 and the sleeve 5.

[0038] It is worth mentioning that the angle of the fan-shaped opening 14 can be set to 155 degrees, which conforms to the range of motion of the human elbow joint bending angle.

[0039] In practical use, the positions of the first limiting rod 15 and the second limiting rod 16 on the fan-shaped opening 14 are rotated to adjust the included angle range between the first limiting rod 15 and the second limiting rod 16, and the position of this included angle range on the fan-shaped opening 14. After adjustment, it is locked by the locking assembly. During the patient's elbow joint movement, the rotating column 6 rotates within the sleeve 5. At this time, the limiting block 17 at the end of the rotating column 6 can only move in the mating groove 18 on the first limiting rod 15 and the second limiting rod 16, and is restricted by both, thereby enabling the elbow joint to rotate within a certain range of this fixed angle.

[0040] In some embodiments, such as Figure 5 As shown, the locking assembly includes second limiting teeth 19 disposed around the outside of the sleeve 5 and evenly distributed at the position of the fan-shaped opening 14; the outer ends of the first limiting rod 15 and the second limiting rod 16 are provided with mounting plates 20 extending to the outside of the second limiting teeth 19, a second locking rod 21 is slidably connected through the mounting plate 20, one end of the second locking rod 21 extends out from the inside of the mounting plate 20 and is provided with a second locking tooth 22 that meshes with the second limiting teeth 19, the other end of the second locking rod 21 is provided with an arc-shaped plate 27, a second compression spring 23 is provided between the bottom end of the arc-shaped plate 27 and the mounting plate 20, and the top surface of the arc-shaped plate 27 abuts against a second cam 24 that is rotatably connected to the mounting plate 20.

[0041] In practical use, when the second cam 24 is rotated, and the protruding end of the second cam 24 moves against the arc plate 27, the second locking rod 21 slides and locks within the mounting plate 20 against the restoring force of the second compression spring 23. At this time, the second locking tooth 22 at the end of the second locking rod 21 engages with the second limiting tooth 19 on the outside of the sleeve 5, thereby locking. When the cam is rotated so that the arc end of the second cam 24 abuts against the arc plate 27, the second locking rod 21 slides within the sleeve 5 under the action of the second compression spring 23. At this time, the second locking tooth 22 at the end of the second locking rod 21 separates from the second limiting tooth 19 on the outside of the rotating column 6, thereby releasing the lock.

[0042] In some embodiments, such as Figures 1-2 As shown, the top surface of the fan-shaped opening 14 is provided with a scale 25, and the width of the mating groove 18 is equal to half the width of the limiting block 17.

[0043] In practical use, the scale 25 is set to facilitate the adjustment of the included angle range between the first limiting rod 15 and the second limiting rod 16, and the width of the mating groove 18 is equal to half the width of the limiting block 17, so that when the limiting block 17 is in the mating block, the rotating column 6 is just aligned with the edge of the set angle range.

[0044] In some embodiments, such as Figure 1 As shown, the second support plate 4 is provided with an auxiliary fixing strap 26 near its outer end.

[0045] In practical use, the auxiliary fixation strap 26 is used to fix it to the patient's other shoulder, thereby improving the stability of the utility model.

Claims

1. An arm immobilization device, characterized by: The device includes a first support plate (3) and a second support plate (4). The first support plate (3) is provided with a first fixing strap (1) for fixing the patient's upper arm, and the second support plate (4) is provided with a second fixing strap (2) for fixing the patient's wrist. One end of the first support plate (3) is provided with a sleeve (5), and the side of one end of the second support plate (4) is provided with a rotating column (6) that is rotatably fitted inside the sleeve (5). One end of the sleeve (5) is provided with a fan-shaped opening (14). The sleeve (5) is rotatably connected with a first limiting rod (15) and a second limiting rod (16) around the end where the fan-shaped opening (14) is provided. The rotating column (6) has a limiting block (17) on the side near the fan-shaped opening (14). The limiting block (17) is provided between the first limiting rod (15) and the second limiting rod (16). The first limiting rod (15) and the second limiting rod (16) are provided with a locking component between the sleeve (5) and the sleeve (5).

2. An arm immobilization device according to claim 1, characterized in that: An angle locking mechanism is provided between the sleeve (5) and the rotating column (6). The locking mechanism includes a first limiting tooth (7) evenly distributed around the outside of the rotating column (6). A first locking rod (8) is slidably connected inside the sleeve (5). One end of the first locking rod (8) is provided with a first locking tooth (9) that matches the first limiting tooth (7). A first compression spring (10) is sleeved on the outside of the first locking rod (8). One end of the first compression spring (10) is fixedly connected to the sleeve (5), and the other end of the first compression spring (10) is fixedly connected to the first locking rod (8). The other end of the first locking rod (8) passes through the outside of the sleeve (5) and is connected to a lifting component.

3. An arm immobilization device according to claim 2, wherein: The lifting assembly includes an abutment plate (11) fixedly connected to the end of the first locking rod (8), and a first cam (12) rotatably connected to the sleeve (5). The first cam (12) is disposed between the abutment plate (11) and the sleeve (5). The axis of rotation of the first cam (12) is parallel to the tangent of the cross section of the sleeve (5), and the outer edge of the first cam (12) abuts against the end face of the abutment plate (11).

4. An arm immobilization device according to claim 3, wherein: A lever handle (13) is provided on the outer side of the first cam (12).

5. The arm immobilization device of claim 1, wherein: The locking assembly includes a second limiting tooth (19) disposed around the outside of the sleeve (5) and evenly distributed around the position of the fan-shaped opening (14); the outer ends of the first limiting rod (15) and the second limiting rod (16) are provided with a mounting plate (20) extending to the outside of the second limiting tooth (19); a second locking rod (21) is slidably connected through the mounting plate (20); one end of the second locking rod (21) passes through the inside of the mounting plate (20) and is provided with a second locking tooth (22) that meshes with the second limiting tooth (19); the other end of the second locking rod (21) is provided with an arc plate (27); a second compression spring (23) is provided between the bottom end of the arc plate (27) and the mounting plate (20); and the top surface of the arc plate (27) abuts against a second cam (24) that is rotatably connected to the mounting plate (20). ​ 6. The arm immobilization device of claim 1, wherein: The top surface of the fan-shaped opening (14) is provided with a scale (25). ​ 7. The arm immobilization device of claim 1, wherein: The first limiting rod (15) and the second limiting rod (16) have mating grooves (18) on their sides that cooperate with the limiting block (17). The width of the mating groove (18) is equal to half the width of the limiting block (17).

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