Walking aid for cardiothoracic surgery nursing

Abstract

The invention relates to a walking aid for cardiothoracic surgical nursing, which belongs to the technical field of surgical nursing instruments and comprises a support plate, a cushion mechanism, a universal wheel component and a locking mechanism. The universal wheel assembly is installed at the bottom of the supporting plate, rotates in the vertical direction and the horizontal direction with the supporting plate and is used for supporting and assisting a patient in walking vertically, the cushion mechanism is arranged on the supporting plate and connected with the locking mechanism, and the patient sits on the cushion mechanism when having a rest midway. The locking mechanism changes the vertical movement of the cushion mechanism into the horizontal movement of the locking mechanism, the locking mechanism is used for changing the movement state of the universal wheel assembly in the horizontal direction and the vertical direction, when the cushion mechanism is pressed, the universal wheels are automatically locked instantly, the walking aid is prevented from sliding or turning on one side, and the safety of the walking aid is improved. When a patient sits down, the walking aid is automatically fixed, the moving function is recovered when the patient gets up, the problem that a traditional walking aid needs manual operation and is poor in stability is solved, and the safety and convenience of postoperative care are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of surgical nursing instruments, and in particular relates to a walker for cardiothoracic surgical nursing. Background Art

[0002] After cardiothoracic surgery, patients are generally in weak physical condition, and due to surgical trauma and the need for postoperative recovery, patients often need to rest in bed for a long time. However, in order to promote postoperative recovery and prevent postoperative complications such as lung infection and deep vein thrombosis, early bed rest is crucial.

[0003] Traditional walkers rely on the patient's upper limbs (arms and shoulders) to support their body weight. However, after cardiothoracic surgery, patients experience a significant decrease in upper limb muscle strength (approximately 30%-50% of preoperative strength) due to factors such as sternotomy and chest tube fixation. Forced support can easily lead to sternotomy traction and shoulder joint strain.

[0004] Existing walkers are mostly used for patients with limited mobility and are not suitable for patients who have just undergone cardiothoracic surgery. This is because patients who have undergone cardiothoracic surgery have normal leg and foot functions and can walk normally, but their upper limbs are weak and cannot exert too much force to support and lift the walker for activities. In addition, since patients have just undergone cardiothoracic surgery, they often need to rest after walking a short distance, and existing walkers lack the function of allowing users to rest.

[0005] Although existing universal walkers can achieve the function of not having to lift the walker, their universal rotation makes the walker extremely flexible but unstable, especially when the patient needs to rest during walking. The stability of the walker can prevent the patient from falling due to the rotation of the universal wheels. Secondly, the existing universal wheel locking mechanism requires foot operation to lock or unlock, which is very cumbersome for patients who need to rest frequently during walking, and even more difficult for patients without a companion to complete this action.

[0006] There is a need for a walker for cardiothoracic surgery care that allows for rest breaks and has a stable locking mechanism. Summary of the Invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides a walker for cardiothoracic surgery nursing, which solves the problem that the existing walker does not provide a rest mechanism and the walker is easy to slide during the rest process.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A walker for cardiothoracic surgery nursing, comprising a support plate, a seat cushion mechanism, a universal wheel assembly and a locking mechanism; the universal wheel assembly is mounted on the bottom of the support plate and rotates vertically and horizontally with the support plate to support and assist the patient in upright walking; the seat cushion mechanism is arranged on the support plate and connected to the locking mechanism; the patient sits on the seat cushion mechanism to rest during walking; the locking mechanism changes the vertical movement of the seat cushion mechanism into horizontal movement of the locking mechanism; the locking mechanism is used to change the horizontal and vertical movement states of the universal wheel assembly.

[0010] Preferably, the seat cushion mechanism includes a main beam, a pair of hinged rods, a pad, a spring and a seat cushion; the main beam is fixedly arranged at the bottom of the support plate, the pair of hinged rods are used to connect the main beam and the pad, and the seat cushion is connected to the pad through the spring.

[0011] Preferably, the universal wheel assembly array is arranged at the bottom of the support plate, and the universal wheel assembly includes a bearing member, a connecting plate and a roller. The bearing member is fixedly connected to the bottom of the support plate, the connecting plate and the bearing member are rotatably connected to realize the horizontal rotation of the support plate, and the roller is rotatably connected to the connecting plate to realize the vertical rotation of the support plate.

[0012] Preferably, the locking mechanism includes a transmission assembly and a locking assembly; the transmission assembly is connected to the seat cushion, and the seat cushion is slidably connected to the pad, and the transmission assembly is used to convert the vertical movement of the seat cushion into horizontal movement, and the horizontal movement of the transmission assembly drives the locking assembly to lock or unlock the universal wheel assembly; the transmission assembly includes a transmission rod, a transmission tooth and two movable plates; the main beam is hollow inside, the transmission tooth is rotatably arranged on the main beam, and the transmission tooth is provided with an internal thread and an external tooth portion, one end of the transmission rod is connected to the bottom of the seat cushion, and the other end of the transmission rod is provided with a threaded portion, and the threaded portion is connected to the internal thread, for converting the linear motion of the transmission rod in the vertical direction into the rotational motion of the transmission tooth in the horizontal direction; the two movable plates are meshed with the transmission teeth, and the transmission teeth are located between the two movable plates, and the rotation of the transmission teeth drives the two movable plates to move in opposite directions.

[0013] Preferably, the locking assembly includes a locking sleeve, a clamping strip and a limit strip; any of the movable plates is connected to the locking sleeve, and the locking sleeve is slidably connected to the main beam; the locking sleeve is hollow inside and is provided with a connecting rod, one end of the clamping strip is fixedly connected to the connecting rod, and the other end is fixedly connected to the limit strip; the locking sleeve is provided with a sliding groove, the limit strip is slidably connected to the sliding groove, and the clamping strip is used to push the limit strip out of the sliding groove.

[0014] Preferably, the bearing member is provided with a snap-fit ​​groove, and the support plate is provided with a snap-fit ​​channel connecting the snap-fit ​​groove and the inside of the main beam, and the inner wall of the snap-fit ​​channel is flush with the outer wall of the locking sleeve; the snap-fit ​​portion of the limit bar is arranged downward and engages with the snap-fit ​​groove to prevent relative movement between the bearing member and the support plate.

[0015] Preferably, the locking assembly further includes an abutment member and a brake member, the abutment member is slidably arranged at the bottom of the clamping groove, the brake member is hingedly arranged on the connecting plate, the abutment member is used to abut the brake member downward, and the brake member is used to prevent the roller from rotating.

[0016] Preferably, the seat cushion mechanism also includes a lifting component, which is used to adjust the height of the seat cushion; the lifting component includes a threaded cylinder, a rotating cylinder and a latch; the threaded cylinder is fixedly arranged at the bottom of the pad, and the rotating cylinder is rotatably installed at the bottom of the pad, the threaded cylinder and the rotating cylinder are coaxially threaded, and the rotating cylinder and the threaded cylinder are respectively connected to a pair of the hinged rods, and the rotating cylinder rotates to change the angle between the pair of the hinged rods, which is used to change the height of the seat cushion.

[0017] Preferably, a hanging rod is further provided on one side of the top of the support plate, and the hanging rod is provided with a hook for hanging a drainage bag and an infusion bottle.

[0018] Preferably, handrails are symmetrically provided on the top of the support plate.

[0019] The beneficial effects of the present invention are:

[0020] When the cushion mechanism of the present application is under pressure, the universal wheels are automatically locked instantly to prevent the walker from sliding or tipping over. It is especially suitable for weak patients after surgery. It relies entirely on gravity triggering. It automatically locks when the patient sits down and automatically unlocks when the patient stands up, avoiding accidental movement caused by forgetting to operate the brakes. Through the gravity-driven mechanical locking mechanism, the walker is automatically fixed when the patient sits down and the mobile function is restored when the patient stands up, solving the core pain points of traditional walkers that require manual operation and poor stability, and significantly improving the safety and convenience of postoperative care. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a walking aid provided in one embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a partial cross-sectional structure of a walking aid provided in one embodiment of the present invention;

[0024] Figure 3 This is a structural schematic diagram of a bearing member in a clamping state provided in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a top view of a seat cushion mechanism provided in one embodiment of the present invention;

[0026] Figure 5 It is a schematic front view of the structure of a walking aid provided in one embodiment of the present invention;

[0027] Legend: 1. Support plate; 2. Cushion mechanism; 21. Main beam; 22. Articulated rod; 23. Pad; 24. Spring; 25. Cushion; 26. Threaded cylinder; 27. Rotating cylinder; 28. Latch; 3. Universal wheel assembly; 31. Bearing; 311. Snap-in groove; 32. Connecting sheet; 33. Roller; 4. Transmission assembly; 41. Transmission rod; 42. Transmission gear; 43. Moving plate; 5. Locking assembly; 51. Locking sleeve; 52. Card strip; 53. Limiting strip; 54. Abutment; 55. Brake component; 61. Suspension rod; 62. Hook; 7. Armrest. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] like Figure 1-Figure 5 As shown, a walker for cardiothoracic surgery nursing comprises a support plate 1, a seat cushion mechanism 2, a universal wheel assembly 3 and a locking mechanism; the universal wheel assembly 3 is mounted on the bottom of the support plate 1 and rotates vertically and horizontally with the support plate 1 to support and assist the patient in walking upright; the seat cushion mechanism 2 is arranged on the support plate 1 and connected to the locking mechanism; when the patient sits on the seat cushion mechanism 2 for a rest, the locking mechanism changes the vertical movement of the seat cushion mechanism 2 into the horizontal movement of the locking mechanism; the locking mechanism is used to change the horizontal and vertical movement states of the universal wheel assembly 3;

[0030] When the patient sits on the cushion mechanism 2 to rest, the patient's weight is applied to the cushion mechanism 2, causing it to move downward in the vertical direction. The cushion mechanism 2 converts the vertical displacement into horizontal movement of the locking mechanism through the screw principle. When the locking mechanism moves horizontally, its end engages with the universal wheel assembly 3, preventing the universal wheel from rotating in the horizontal and vertical directions; when the patient stands up (the gravity of the cushion mechanism 2 is released), the locking mechanism automatically returns to its original position under the action of the spring 24, releasing the engagement with the universal wheel assembly 3;

[0031] In summary, when the cushion mechanism 2 of the present application is under pressure, the universal wheels are automatically locked instantly to prevent the walker from sliding or tipping over. It is especially suitable for weak patients after surgery. It relies entirely on gravity triggering. It automatically locks when the patient sits down and automatically unlocks when the patient stands up, avoiding accidental movement caused by forgetting to operate the brakes. Through the gravity-driven mechanical locking mechanism, the walker is automatically fixed when the patient sits down and the mobile function is restored when the patient stands up, solving the core pain points of traditional walkers that require manual operation and poor stability, and significantly improving the safety and convenience of postoperative care.

[0032] In one embodiment, the seat cushion mechanism 2 includes a main beam 21, a pair of hinged rods 22, a pad 23, a spring 24 and a seat cushion 25; the main beam 21 is rigidly fixed to the bottom of the support plate 1, serving as the core load-bearing skeleton of the entire seat cushion mechanism 2, ensuring that the force is evenly transmitted to the support plate 1. One end of a pair of hinged rods 22 is connected to the main beam 21 through a rotary hinge, and the other end is hinged to the pad 23, allowing the pad 23 to move up and down in the vertical direction while maintaining a horizontal posture. The seat cushion 25 is connected to the pad 23 through a spring 24, and the pad and the pad 23 are connected through a coil compression spring 24. The two ends of the spring 24 are respectively fixed to the bottom of the seat cushion 25 and the upper surface of the pad 23. After the patient stands up, the gravity of the seat cushion 25 is released, the spring 24 returns to its original length, and pushes the seat cushion 25 to rise vertically, providing a restoring force for the seat cushion 25, so that when the person leaves the seat cushion 25, the locking mechanism drives the universal wheel assembly 3 to leave.

[0033] In one embodiment, a universal wheel assembly 3 is arrayed at the bottom of the support plate 1. The universal wheel assembly 3 includes a bearing member 31, a connecting plate 32, and a roller 33. The bearing member 31 is fixedly connected to the bottom of the support plate 1, and the connecting plate 32 is rotatably connected to the bearing member 31 for realizing horizontal rotation of the support plate 1. The roller 33 is rotatably connected to the connecting plate 32 for realizing vertical rotation of the support plate 1. The bearing member 31 is rigidly fixed to the bottom of the support plate 1, and the roller 33 is connected to the connecting plate 32 via an independent rotating shaft. When the patient moves onto a slope or uneven ground, the roller 33 can adaptively adjust the pitch angle (maximum ±90°) around its own axis to ensure that the roller 33 is always in contact with the ground, preventing the front end of the walker from tilting or the rear end from dragging on the ground. The horizontal rotation and vertical rotation are kinematically coupled through the connecting plate 32. When the patient walks, the two sets of revolving pairs transmit torque through the plate, allowing the walker to move in a straight line with the patient while also flexibly adapting to complex trajectories such as turning, going up and down slopes, and forming omnidirectional movement capabilities in three-dimensional space.

[0034] In summary, the connecting plate 32 forms a rotating pair with the bearing part 31 through the deep groove ball bearing. When the patient pushes the walker to turn (such as to avoid an obstacle), the connecting plate 32 can rotate freely around the bearing axis to achieve resistance-free horizontal turning. The dual-degree-of-freedom rotation design (horizontal 360° + vertical ±90°) of the universal wheel assembly 3 allows the patient to flexibly turn without lifting the walker, reducing the operational burden caused by insufficient upper limb strength in postoperative patients.

[0035] In one embodiment, the locking mechanism includes a transmission assembly 4 and a locking assembly 5; the transmission assembly 4 is connected to the seat cushion 25, and the seat cushion 25 is slidably connected to the pad 23. The transmission assembly 4 is used to convert the vertical movement of the seat cushion 25 into horizontal movement, and the horizontal movement of the transmission assembly 4 drives the locking assembly 5 to lock or unlock the universal wheel assembly 3; the transmission assembly 4 includes a transmission rod 41, a transmission tooth 42 and two movable plates 43; the main beam 21 is hollow inside, and the transmission tooth 42 is rotatably set on the main beam 21, and the transmission tooth 42 is provided with an internal thread and an external tooth portion. One end of the transmission rod 41 is connected to the bottom of the seat cushion 25, and the other end of the transmission rod 41 is provided with a threaded portion, which is connected to the internal thread and is used to convert the linear motion of the transmission rod 41 in the vertical direction into the rotational motion of the transmission tooth 42 in the horizontal direction; the two movable plates 43 are meshed with the transmission tooth 42, and the transmission tooth 42 is located between the two movable plates 43. The rotation of the transmission tooth 42 drives the two movable plates 43 to move in opposite directions;

[0036] The seat cushion 25 moves downward to drive the transmission rod 41: the patient's weight is applied to the seat cushion 25, causing the seat cushion 25 to move downward in the vertical direction, driving the transmission rod 41 fixed to its bottom to move downward synchronously; the threaded transmission converts the direction of movement: the threaded portion at the end of the transmission rod 41 engages with the internal thread of the transmission teeth 42, and the vertical linear motion of the transmission rod 41 is converted into horizontal rotational motion of the transmission teeth 42. The external teeth of the transmission teeth 42 engage with the movable plates 43 on both sides. When the transmission teeth 42 rotate, the two movable plates 43 are meshed with the gears and move horizontally in opposite directions along the internal guide rail of the main beam 21 (for example, the left movable plate moves leftward and the right movable plate moves rightward);

[0037] After the patient stands up, the weight of the cushion 25 disappears, the transmission rod 41 rises under the action of the reset spring 24, the transmission gear 42 rotates in the opposite direction, and the movable plate 43 returns to the center; when the movable plate 43 returns to its original position, the locking assembly 5 and the universal wheel assembly 3 are disengaged, and the roller 33 resumes free rotation; fast reset and low operating force:

[0038] The module (m=1.5) and tooth profile angle (20°) of the transmission tooth 42 are designed to reduce gear meshing friction, with a transmission efficiency of >90%. The pitch (P=3mm) of the transmission rod 41 and the number of teeth (Z=30) of the transmission tooth 42 are matched to patients of different weights (50-150kg), and the dynamic range of the locking force is 50-200N.

[0039] In summary, this embodiment uses a thread-gear composite transmission mechanism to accurately convert the patient's gravity into a bidirectional symmetrical locking force, realizing the control of the walker "locking when sitting down and walking when standing up". At the same time, through self-locking, balanced and adaptive design, it completely solves the core pain points of traditional walkers such as cumbersome manual operation and unstable locking, providing safe and reliable movement support for postoperative patients.

[0040] In one embodiment, the locking assembly 5 includes a locking sleeve 51, a clamping strip 52 and a limit strip 53; any movable plate 43 is connected to the locking sleeve 51, and the locking sleeve 51 is slidably connected to the main beam 21; the locking sleeve 51 is hollow inside and is provided with a connecting rod, one end of the clamping strip 52 is fixedly connected to the connecting rod, and the other end is fixedly connected to the limit strip 53; the locking sleeve 51 is provided with a sliding groove, and the limit strip 53 is slidably connected to the sliding groove, and the clamping strip 52 is used to push the limit strip 53 out When the movable plate 43 moves, the locking sleeve 51 is driven to slide on the main beam 21, and the connecting rod inside the locking sleeve 51 moves accordingly, and the clamping strip 52 is driven by the connecting rod, thereby pushing the limit strip 53 out of the slide slot. When the limit strip 53 is pushed out, it engages with the clamping groove 311 to play a locking role, preventing the universal wheel from rotating. When unlocking is required, the movable plate 43 is moved in the opposite direction, so that the clamping strip 52 pulls the limit strip 53 back into the slide slot, releasing the locking state.

[0041] When the locking sleeve 51 is moved to a certain position, the clamping portion of the limit bar 53 just enters the clamping groove 311 of the bearing member 31, forming a lock.

[0042] In one embodiment, the locking assembly 5 further includes an abutment 54 and a brake member 55. The abutment 54 is slidably arranged at the bottom of the clamping groove 311, and the brake member 55 is hingedly arranged on the connecting plate 32. The abutment 54 is used to abut the brake member 55 downward, and the brake member 55 is used to prevent the roller 33 from rotating. When the patient sits down, the seat cushion 25 is pressed down, and the clamping member is clamped to the clamping groove 311, it abuts against the abutment 54, moves the abutment 54 downward, and the abutment 54 presses down one end of the brake member 55. The free end (friction plate) of the brake member 55 rotates and presses the surface of the roller 33. The friction torque prevents the roller 33 from rotating. When the patient stands up, the abutment 54 is not abutted by the limit bar 53 and moves upward to restore its original state under the action of its own elastic connecting member. The abutment 54 is located on the bearing member 31 to avoid connection with the support plate 1 when restoring its original state, thereby limiting the rotation of the bearing member 31. At the same time, the brake member 55 rotates around the hinge point under the action of the torsion spring, the friction plate is separated from the roller 33, the roller 33 is released from the constraint, and the walker can move freely. The bottom of the abutment 54 adopts an arc-shaped contact surface, which matches the curved surface of the hinged end of the brake member 55 to avoid unilateral wear caused by unbalanced load.

[0043] In one embodiment, the seat mechanism 2 further includes a lifting assembly, which is used to adjust the height of the seat cushion 25; the lifting assembly includes a threaded cylinder 26, a rotating cylinder 27 and a latch 28; the threaded cylinder 26 is fixedly arranged at the bottom of the base plate 23, and the rotating cylinder 27 is rotatably installed at the bottom of the base plate 23, the threaded cylinder 26 and the rotating cylinder 27 are coaxially threadedly connected, and the rotating cylinder 27 and the threaded cylinder 26 are respectively connected to a pair of hinged rods 22, and the rotating cylinder 27 rotates to change the angle between the pair of hinged rods 22 to change the height of the seat cushion 25; the rotating cylinder 27 is rotated, and the rotating cylinder 27 moves along the threaded cylinder 26, thereby reducing or increasing the distance between the facing ends of the threaded cylinder 26 and the rotating cylinder 27. In this way, during the process of distance change, the angle between the pair of hinged rods 22 is driven to change, and when the distance between the hinged rods 22 changes, the height of the seat cushion 25 becomes higher or lower accordingly. The rotating cylinder 27 has 6 positioning holes evenly distributed around the circumference, and the latch 28 is inserted to limit rotation (shear force ≥ 200N) to prevent it from sliding down due to misoperation or gravity.

[0044] In one embodiment, a hanging rod 61 is further provided on one side of the top of the support plate 1, and the hanging rod 61 is provided with a hook 62 for hanging a drainage bag and an infusion bottle; the hanging rod 61 and the hook 62 enable patients to conveniently hang drainage bags and infusion bottles. Traditionally, patients need to hold the drainage bags and infusion bottles, which is very inconvenient. In addition, the height of the hook 62 can be adjusted on the hanging rod 61 (achieved by existing technology) to maintain the correct drainage angle and reduce the risk of infection.

[0045] In one embodiment, armrests 7 are symmetrically provided on the top of the support plate 1. The symmetrically provided armrests 7 can help the patient maintain balance. Cardiothoracic surgery patients need to recover slowly after surgery and may be weak when walking. The armrests 7 provide support to reduce the risk of falling; the armrests 7 on both sides are stressed at the same time to avoid instability of the walker due to excessive weight on one side.

[0046] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A walker for cardiothoracic surgery nursing, characterized in that: It includes a support plate, a seat cushion mechanism, a universal wheel assembly and a locking mechanism; the universal wheel assembly is installed at the bottom of the support plate and rotates vertically and horizontally with the support plate to support and assist the patient in walking upright; the seat cushion mechanism is arranged on the support plate and connected to the locking mechanism; the patient sits on the seat cushion mechanism to rest in the middle of the journey; the locking mechanism changes the vertical movement of the seat cushion mechanism into the horizontal movement of the locking mechanism; the locking mechanism is used to change the movement state of the universal wheel assembly in the horizontal and vertical directions.

2. A walker for cardiothoracic surgery nursing according to claim 1, characterized in that: The seat cushion mechanism includes a main beam, a pair of hinged rods, a pad, a spring and a seat cushion; the main beam is fixedly arranged at the bottom of the support plate, the pair of hinged rods are used to connect the main beam and the pad, and the seat cushion is connected to the pad through the spring.

3. A walker for cardiothoracic surgery nursing according to claim 2, characterized in that: The universal wheel assembly array is arranged at the bottom of the support plate, and the universal wheel assembly includes a bearing member, a connecting plate and a roller. The bearing member is fixedly connected to the bottom of the support plate, and the connecting plate and the bearing member are rotatably connected to realize the horizontal rotation of the support plate. The roller is rotatably connected to the connecting plate to realize the vertical rotation of the support plate.

4. A walker for cardiothoracic surgery nursing according to claim 3, characterized in that: The locking mechanism includes a transmission assembly and a locking assembly; the transmission assembly is connected to the seat cushion, and the seat cushion is slidably connected to the pad, and the transmission assembly is used to convert the vertical movement of the seat cushion into horizontal movement, and the horizontal movement of the transmission assembly drives the locking assembly to lock or unlock the universal wheel assembly; the transmission assembly includes a transmission rod, a transmission tooth and two movable plates; the main beam is hollow inside, and the transmission tooth is rotatably arranged on the main beam, and the transmission tooth is provided with an internal thread and an external tooth portion, one end of the transmission rod is connected to the bottom of the seat cushion, and the other end of the transmission rod is provided with a threaded portion, and the threaded portion is connected to the internal thread, for converting the linear motion of the transmission rod in the vertical direction into the rotational motion of the transmission tooth in the horizontal direction; The two movable plates are engaged with the transmission teeth, and the transmission teeth are located between the two movable plates. The rotation of the transmission teeth drives the two movable plates to move in opposite directions.

5. A walker for cardiothoracic surgery nursing according to claim 4, characterized in that: The locking assembly includes a locking sleeve, a clamping strip and a limit strip; any of the movable plates is connected to the locking sleeve, and the locking sleeve is slidably connected to the main beam; the locking sleeve is hollow inside and is provided with a connecting rod, one end of the clamping strip is fixedly connected to the connecting rod, and the other end is fixedly connected to the limit strip; the locking sleeve is provided with a sliding groove, the limit strip is slidably connected to the sliding groove, and the clamping strip is used to push the limit strip out of the sliding groove.

6. A walker for cardiothoracic surgery nursing according to claim 5, characterized in that: The bearing component is provided with a clamping groove, and the support plate is provided with a clamping channel connecting the clamping groove and the inside of the main beam, and the inner wall of the clamping channel is flush with the outer wall of the locking sleeve; the clamping portion of the limit bar is arranged downward and is engaged with the clamping groove to prevent the bearing component and the support plate from relative movement.

7. A walker for cardiothoracic surgery nursing according to claim 6, characterized in that: The locking assembly also includes an abutment member and a brake member, wherein the abutment member is slidably arranged at the bottom of the clamping groove, and the brake member is hingedly arranged on the connecting plate. The abutment member is used to abut the brake member downward, and the brake member is used to prevent the roller from rotating.

8. A walker for cardiothoracic surgery nursing according to claim 2, characterized in that: The seat cushion mechanism also includes a lifting component, which is used to adjust the height of the seat cushion; the lifting component includes a threaded cylinder, a rotating cylinder and a latch; the threaded cylinder is fixedly arranged at the bottom of the pad, and the rotating cylinder is rotatably installed at the bottom of the pad, the threaded cylinder and the rotating cylinder are coaxially threaded, and the rotating cylinder and the threaded cylinder are respectively connected to a pair of the hinged rods, and the rotating cylinder rotates to change the angle between the pair of the hinged rods, which is used to change the height of the seat cushion.

9. The walker for cardiothoracic surgery nursing according to claim 1, characterized in that: A hanging rod is also provided on one side of the top of the support plate. The hanging rod is provided with a hook for hanging a drainage bag and an infusion bottle.

10. A walker for cardiothoracic surgery nursing according to claim 1, characterized in that: Handrails are symmetrically arranged on the top of the support plate.

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