A sterile cassette for controlling a catheter

Abstract

The present invention relates to a sterile box for controlling a catheter, which comprises a driven wheel assembly, a driving wheel assembly, a positioning and fixing assembly and a box body. A catheter track is provided on the top surface of the box body. The driven wheel assembly and the driving wheel assembly are respectively arranged on both sides of the catheter track. The driven wheel assembly includes a driven wheel support rotating member, a driven wheel, etc. The driven wheel support rotating member is connected to the box body through a rotating shaft and rotates around the rotating shaft. The driven wheel is fixed on the driven wheel support rotating member and freely rotates around the mounting shaft. The driving wheel assembly includes a driving wheel mounting shaft and a driving wheel. The driving wheel is mounted on the driving wheel mounting shaft, and the driving wheel mounting shaft is connected to the box body. The catheter passes between the driven wheel and the driving wheel. The positioning and fixing assembly includes a positioning and fixing member and a spring. The positioning and fixing member is mounted on the box body through its guiding shaft, and the driven wheel is fixed by compressing the spring, thereby clamping the catheter. The present invention can meet the doctor's control of the catheter during vascular interventional surgery, improve efficiency and has strong operability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a sterile box for a control catheter suitable for vascular interventional surgery. Background Art

[0002] According to statistics, currently, the number of people worldwide who die from cardiovascular and cerebrovascular diseases has accounted for more than 30% of the total number of deaths, ranking first among all causes of death and increasing year by year. Cardiovascular and cerebrovascular diseases have become the number one killer endangering human health. The treatment methods for cardiovascular diseases mainly include drugs, intervention, surgical treatment, etc. In recent years, vascular interventional surgery has developed rapidly due to its advantages such as small trauma and high safety, and has become the main treatment method for cardiovascular diseases. Vascular interventional surgery is a procedure in which clinicians manually introduce precision instruments such as stents, guide wires, and catheters into the human body with the aid of medical imaging equipment to diagnose and locally treat pathological conditions in the body. However, the current traditional vascular interventional surgery is a double-edged sword. Although it has significant advantages, its disadvantages are also obvious. For example, (1) Since doctors need to operate under medical imaging equipment, they are exposed to the X-ray environment for a long time, which causes great harm to the body; (2) Although the entire surgical process is guided by images, instruments such as guide wires and catheters are small, and high operating skills are required from doctors.

[0003] With the development of science and technology, the advent of vascular interventional surgery control systems is gradually solving the above deficiencies. The existing technologies for operating catheters are generally divided into: (1) Using a motor to control the opening and closing, advancement, and retraction of the catheter clamping rollers. The structure is simple, but there are many motor drive interfaces, the cost is high, and the maintenance difficulty is large; (2) Through a torsion spring structure, manually operating the opening and closing of the catheter rollers. The structure is simple, but it requires the cooperation of both hands and the operation is relatively complex. Summary of the Invention

[0004] The object of the present invention is to solve the above deficiencies, thereby providing a sterile box for a control catheter that can enable doctors to quickly achieve the operation control of the catheter during vascular interventional surgery, improve efficiency and is highly operable, and can meet the clinical use requirements to the greatest extent.

[0005] To achieve the above object, a sterile box for controlling a catheter is designed, which includes a driven wheel assembly 2, a driving wheel assembly 3 and a box body. A catheter track is provided on the top surface of the box body for placing a catheter 6. The driven wheel assembly 2 and the driving wheel assembly 3 are respectively arranged on both sides of the catheter track and are located inside the box body. The driven wheel assembly 2 includes a driven wheel support rotating member 2-1 and a driven wheel 2-3. The driven wheel support rotating member 2-1 is connected to the box body through a rotating shaft and rotates around the rotating shaft. The driven wheel 2-3 is fixed on the driven wheel support rotating member 2-1 and freely rotates around the mounting shaft. The driving wheel assembly 3 includes a driving wheel mounting shaft 3-1 and a driving wheel 3-2. The driving wheel 3-2 is mounted on the driving wheel mounting shaft 3-1, and the driving wheel mounting shaft 3-1 is connected to the box body. The catheter 6 passes between the driven wheel 2-3 and the driving wheel 3-2. The driven wheel 2-3 rotates counterclockwise or clockwise with the driven wheel support rotating member 2-1 and separates from or approaches the driving wheel 3-2, thereby realizing the installation and replacement of the catheter 6, and clamping and fixing the catheter 6 when the driven wheel 2-3 is pressed against the driving wheel 3-2.

[0006] Further, the box body is composed of a housing 5 and a track support cover 4 covering the housing 5. The catheter track is arranged in the middle of the top surface of the track support cover 4.

[0007] Further, the driven wheel support rotating member 2-1 includes a knob 2-1-1, a pressing rotating shaft 2-1-2, a support rotating substrate 2-1-3, a moving inclined groove 2-1-4, a driven wheel mounting shaft 2-1-5 and a support rotating shaft 2-1-6. A moving inclined groove 2-1-4 is provided in the middle of the support rotating substrate 2-1-3. A driven wheel mounting shaft 2-1-5 is installed on one side of the support rotating substrate 2-1-3, and a support rotating shaft 2-1-6 is installed on the other side of the support rotating substrate 2-1-3. A knob 2-1-1 is installed at the top of the support rotating shaft 2-1-6. The bottom end of the support rotating shaft 2-1-6 passes through the back surface of the support rotating substrate 2-1-3 and is connected to the box body. A horizontal pressing rotating shaft 2-1-2 is installed in the middle of the support rotating shaft 2-1-6. The driven wheel 2-3 is installed on the driven wheel mounting shaft 2-1-5 and freely rotates around the driven wheel mounting shaft 2-1-5. A pressing rotating roller sleeve 2-2 is installed on the pressing rotating shaft 2-1-2 through a snap ring. The pressing rotating roller sleeve 2-2 freely rotates around the pressing rotating shaft 2-1-2. The pressing rotating roller sleeve 2-2 is located above the moving inclined groove 2-1-4. The support rotating shaft 2-1-6 passes through the round holes on the housing 5 and the track support cover 4 and is fixed on the substrate of the housing 5. The driven wheel assembly 2 rotates around the support rotating shaft 2-1-6 by rotating the knob 2-1-1.

[0008] Further, the positioning and fixing component 7 is composed of a positioning and fixing member 7-1, a spring A 7-2, and a spring B 7-3. The positioning and fixing member 7-1 includes a compression substrate 7-1-1, a compressible ball head 7-1-2, a guide shaft A 7-1-3, and a guide shaft B 7-1-4. The head of the compression substrate 7-1-1 is equipped with the compressible ball head 7-1-2, and the tail of the compression substrate 7-1-1 is provided with the mutually parallel guide shaft A 7-1-3 and guide shaft B 7-1-4. The spring A 7-2 and the spring B 7-3 are respectively connected to the bottoms of the guide shaft A 7-1-3 and the guide shaft B 7-1-4. The positioning and fixing member 7-1 is installed on the housing 5 through the guide shaft A 7-1-3 and the guide shaft B 7-1-4, and contacts and separates from the moving chute 2-1-4 through the compressible ball head 7-1-2.

[0009] Further, the compressible ball head 7-1-2 is composed of a ball and a spring. The spring is arranged between the compression substrate 7-1-1 and the ball, and the ball relies on the spring compression.

[0010] Further, the driving wheel assembly 3 further includes a bevel gear A 3-3, a bevel gear B 3-4, and a bevel gear mounting shaft 3-5. The bevel gear A 3-3 and the bevel gear B 3-4 are perpendicular to each other and are meshed and connected. The bevel gear A 3-3 is installed on the driving wheel mounting shaft 3-1 and is fixed and locked through a flat key and a screw. The bevel gear B 3-4 is installed on the bevel gear mounting shaft 3-5 and is fixed and locked through a flat key and a screw. The bevel gear mounting shaft 3-5 is connected to the motor output end of the motion control assembly 1. The bevel gear mounting shaft 3-5 rotates driven by the motor, thereby driving the bevel gear B 3-4 to rotate. The bevel gear B 3-4 drives the bevel gear A 3-3 to rotate, thereby driving the driving wheel 3-2 to rotate. When the driving wheel 3-2 is in contact with the driven wheel 2-3, it drives the driven wheel 2-3 to rotate through friction, thereby realizing the forward and withdrawal movements of the catheter 6.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] (1) The present invention can quickly realize the operation control, forward movement, withdrawal, and clamping and fixing of the catheter, and maximally meets the clinical use requirements;

[0013] (2) The present invention provides a disposable sterile (operation / control) box for separately controlling the catheter. The operation box is small in volume and low in cost, and can support the use of a new sterile box for each operation, effectively solving the problem of difficult repeated disinfection;

[0014] (3) The present invention can achieve the clamping and propulsion (withdrawal) control of different types of catheters, meet the clinical use requirements of vascular interventional surgery, and at the same time can effectively clamp the catheter to fix its position, which is convenient for operation and has low cost;

[0015] (4) The structure of the present invention is simple, with a high degree of integration and small size, which is easy to install and process. It can not only quickly replace the catheter, but also realize the movement and clamping of the catheter, improving the efficiency and operability;

[0016] (5) The present invention can meet the operation of the catheter by doctors during vascular interventional surgery. Similarly, this structure is also applicable to the operation of guide wires or other instruments such as stents, and is worthy of popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is an exploded view of the present invention;

[0019] Figure 3a is a schematic structural diagram of the driven wheel support rotating part of the present invention Figure 1 ;

[0020] Figure 3b is a schematic structural diagram of the driven wheel support rotating part of the present invention Figure 2 ;

[0021] Figure 4 is a schematic structural diagram of the positioning and fixing component of the present invention;

[0022] Figure 5 is a schematic diagram of catheter installation of the present invention;

[0023] Figure 6a is a schematic diagram of clamping the catheter of the present invention Figure 1 ;

[0024] Figure 6b is a schematic diagram of clamping the catheter of the present invention Figure 2 ;

[0025] In the figure: 1. Motion control component; 2. Driven wheel assembly; 3. Driving wheel assembly; 4. Track support cover; 5. Housing; 6. Conduit; 7. Positioning and fixing component; 2-1. Driven wheel support rotating part; 2-2. Pressing and rotating roller sleeve; 2-3. Driven wheel; 2-4. Driven wheel fixed end cover; 3-1. Driving wheel mounting shaft; 3-2. Driving wheel; 3-3. Bevel gear A; 3-4. Bevel gear B; 3-5. Bevel gear mounting shaft; 7-1. Positioning and fixing part; 7-2. Spring A; 7-3. Spring B; 2-1-1. Knob; 2-1-2. Pressing and rotating shaft; 2-1-3. Support rotating substrate; 2-1-4. Moving chute; 2-1-5. Driven wheel mounting shaft; 2-1-6. Support rotating shaft; 7-1-1. Compression substrate; 7-1-2. Compressible ball head; 7-1-3. Guide shaft A; 7-1-4. Guide shaft B. Detailed implementation manner

[0026] The present invention provides a sterile box for controlling a conduit, which includes a driven wheel assembly 2, a driving wheel assembly 3, a positioning and fixing component 7 and a box body. A conduit track is provided on the top surface of the box body, and the conduit track is used for placing the conduit 6. The driven wheel assembly 2 and the driving wheel assembly 3 are respectively arranged on both sides of the conduit track and are located inside the box body. The box body is composed of a housing 5 and a track support cover 4 covering the housing 5, and the conduit track is arranged in the middle of the top surface of the track support cover 4. The driven wheel assembly 2 includes a driven wheel support rotating part 2-1, a pressing and rotating roller sleeve 2-2, a driven wheel 2-3 and a driven wheel fixed end cover 2-4. The driven wheel support rotating part 2-1 is connected to the box body through a rotating shaft and rotates around the rotating shaft. The driven wheel 2-3 and the pressing and rotating roller sleeve 2-2 are both installed on the driven wheel support rotating part 2-1. The driven wheel 2-3 is fixed by the driven wheel fixed end cover 2-4 and rotates freely around the mounting shaft. The driving wheel assembly 3 includes a driving wheel mounting shaft 3-1 and a driving wheel 3-2. The driving wheel 3-2 is installed on the driving wheel mounting shaft 3-1, and the driving wheel mounting shaft 3-1 is connected to the box body. The conduit 6 passes between the driven wheel 2-3 and the driving wheel 3-2. The driven wheel 2-3 rotates counterclockwise or clockwise with the driven wheel support rotating part 2-1, and separates from or approaches the driving wheel 3-2, thereby realizing the installation and replacement of the conduit 6, and clamping and fixing the conduit 6 when the driven wheel 2-3 is in close contact with the driving wheel 3-2.

[0027] Among them, the driven wheel support rotating member 2-1 includes a knob 2-1-1, a pressing rotating shaft 2-1-2, a support rotating substrate 2-1-3, a moving chute 2-1-4, a driven wheel mounting shaft 2-1-5, and a support rotating shaft 2-1-6. A moving chute 2-1-4 is provided in the middle of the support rotating substrate 2-1-3. A driven wheel mounting shaft 2-1-5 is installed on one side of the support rotating substrate 2-1-3, and a support rotating shaft 2-1-6 is installed on the other side of the support rotating substrate 2-1-3. A knob 2-1-1 is installed at the top of the support rotating shaft 2-1-6. The bottom end of the support rotating shaft 2-1-6 passes through the back of the support rotating substrate 2-1-3 and is connected to the box body. A horizontal pressing rotating shaft 2-1-2 is installed in the middle of the support rotating shaft 2-1-6. The driven wheel 2-3 is installed on the driven wheel mounting shaft 2-1-5 and rotates freely around the driven wheel mounting shaft 2-1-5. The pressing rotating roller 2-2 is installed on the pressing rotating shaft 2-1-2 through a circlip and rotates freely around the pressing rotating shaft 2-1-2. The pressing rotating roller 2-2 is located above the moving chute 2-1-4. The support rotating shaft 2-1-6 passes through the circular holes on the housing 5 and the track support cover 4 and is fixed on the substrate of the housing 5. The driven wheel assembly 2 rotates around the support rotating shaft 2-1-6 by rotating the knob 2-1-1.

[0028] The positioning and fixing assembly 7 is composed of a positioning and fixing member 7-1, a spring A 7-2, and a spring B 7-3. The positioning and fixing member 7-1 includes a compression substrate 7-1-1, a compressible ball head 7-1-2, a guide shaft A 7-1-3, and a guide shaft B 7-1-4. A compressible ball head 7-1-2 is installed at the head of the compression substrate 7-1-1. Parallel guide shafts A 7-1-3 and B 7-1-4 are provided at the tail of the compression substrate 7-1-1. Springs A 7-2 and B 7-3 are respectively connected to the bottoms of the guide shafts A 7-1-3 and B 7-1-4. The positioning and fixing member 7-1 is installed on the housing 5 through the guide shafts A 7-1-3 and B 7-1-4 and contacts and separates from the moving chute 2-1-4 through the compressible ball head 7-1-2. The compressible ball head 7-1-2 is composed of a ball and a spring. The spring is arranged between the compression substrate 7-1-1 and the ball, and the ball relies on the spring compression.

[0029] The driving wheel assembly 3 further includes a bevel gear A 3-3, a bevel gear B 3-4, and a bevel gear mounting shaft 3-5. The bevel gear A 3-3 and the bevel gear B 3-4 are perpendicular to each other and meshed. The bevel gear A 3-3 is mounted on the driving wheel mounting shaft 3-1 and fixed and locked by a flat key and a screw. The bevel gear B 3-4 is mounted on the bevel gear mounting shaft 3-5 and fixed and locked by a flat key and a screw. The bevel gear mounting shaft 3-5 is connected to the motor output end of the motion control assembly 1. The bevel gear mounting shaft 3-5 rotates driven by the motor, thereby driving the bevel gear B 3-4 to rotate. The bevel gear B 3-4 drives the bevel gear A 3-3 to rotate, thereby driving the driving wheel 3-2 to rotate. When the driving wheel 3-2 is in contact with the driven wheel 2-3, the driven wheel 2-3 is driven to rotate by friction, thereby realizing the advancement and retraction of the catheter 6.

[0030] The present invention provides a catheter control box. As shown in the attached Figure 1 figure, the control box mainly consists of a motion control assembly 1, a driven wheel assembly 2, a driving wheel assembly 3, an orbit support cover 4, a housing 5, a catheter 6, and a positioning and fixing assembly 7. The driven wheel assembly 2 includes a driven wheel support rotating member 2-1, a pressing and rotating roller sleeve 2-2, a driven wheel 2-3, a driven wheel fixed end cover 2-4, and fixing standard parts (screws, circlips), etc. The driving wheel assembly 3 includes a driving wheel mounting shaft 3-1, a driving wheel 3-2, two perpendicular bevel gears A 3-3 and bevel gears B 3-4, a bevel gear mounting shaft 3-5, and screws, etc. The positioning and fixing assembly 7 includes a positioning and fixing member 7-1, a spring A 7-2, and a spring B 7-3, as shown in the attached Figure 2 figure. The positioning and fixing member 7-1 is mounted on the box body through its guiding shaft, and the driven wheel is fixed by compressing the spring, thereby clamping the catheter. The driven wheel support rotating member 2-1 consists of a knob 2-1-1, a pressing and rotating shaft 2-1-2, a support rotating substrate 2-1-3, a moving chute 2-1-4, a driven wheel mounting shaft 2-1-5, and a support rotating shaft 2-1-6, as shown in the attached Figure 3a and the attached Figure 3b figure. The positioning and fixing member 7-1 consists of a compression substrate 7-1-1, a compressible ball head 7-1-2, a guiding shaft A 7-1-3, and a guiding shaft B 7-1-4, as shown in the attached Figure 4 figure. The compressible ball head 7-1-2 consists of a ball and a spring. The ball can be compressed by the spring, similar to a ball head plunger.

[0031] The following further describes the present invention with specific embodiments: Embodiment

[0032] Quickly realize the quick installation, replacement, and clamping and fixing of different types of catheters. See the attached Figure 5。The driven wheel 2-3 is installed on the driven wheel mounting shaft 2-1-5 and is relatively fixed to the driven wheel fixed end cover 2-4 by screws, enabling it to rotate freely around the mounting shaft. The pressing and rotating roller 2-2 is installed on the pressing-rotating shaft 2-1-2 by a circlip and can also rotate freely around the shaft. The support rotating shaft 2-1-6 passes through the circular holes on the housing 5 and the track support cover 4, and the driven wheel assembly 2 is relatively fixed to the housing substrate by a circlip. Rotate the knob 2-1-1 above the rotating housing, enabling the driven wheel assembly 2 to rotate around the support rotating shaft 2-1-7. The driving wheel 3-2 is installed on the driving wheel mounting shaft 3-1 and then installed together in the stepped circular hole on the housing substrate. The positioning and fixing part 7-1 is installed on the housing substrate through the guide shaft A 7-1-3 and the guide shaft B 7-1-4 and contacts and separates from the moving chute 2-1-4 through the compressible ball head 7-1-2.

[0033] When installing the conduit, rotate the knob 2-1-1 counterclockwise to drive the support rotating substrate 2-1-3 to rotate counterclockwise, thereby driving the driven wheel 2-3 to rotate counterclockwise and separate from the driving wheel 3-2. Pass the conduit 6 through the driven wheel 2-3 and the driving wheel 3-2 from one end of the track of the support cover and place it on the track. Then rotate the knob 2-1-1 clockwise to make the support rotating substrate 2-1-3 rotate clockwise, thereby driving the driven wheel 2-3 to rotate clockwise and approach the driving wheel 3-2. During the process of rotating the knob clockwise, the pressing and rotating roller 2-2 rotates and approaches the compression substrate 7-1-1, and contacts the arc surface on the compression substrate 7-1-1 through its own rotation, gradually causing the positioning and fixing part 7-1 to move downward under the guiding action of the guide shaft A 7-1-3 and the guide shaft B 7-1-4, while compressing the spring A 7-2 and the spring B 7-3, and making the compressible ball head 7-1-2 slowly contact the moving chute 2-1-4. After that, the ball on the compressible ball head 7-1-2 is slowly compressed. When the knob 2-1-1 rotates to the indicated position on the housing, the driven wheel 2-3 presses against the driving wheel 3-2 to clamp and fix the conduit. At this time, the ball on the compressible ball head 7-1-2 tightly presses against the moving chute 2-1-4, and the two springs are compressed to the maximum limit at the same time, greatly increasing the resistance to rotation, thereby fixing the driven wheel 2-3, as shown in Figure 6a and Figure 6b shown.

[0034] When replacing the catheter, rotate the knob 2-1-1 counterclockwise to drive the support rotating substrate 2-1-3 to rotate counterclockwise, thereby driving the driven wheel 2-3 to rotate counterclockwise and separate from the driving wheel 3-2. During the counterclockwise rotation, the pressing rotating sleeve 2-2 rotates away from the compression substrate 7-1-3, and the positioning and fixing member 7-1 returns to its initial position by the resilience of the spring and the guiding action of the guiding shaft A 7-1-3 and the guiding shaft B 7-1-4. At the same time, the support rotating substrate 2-1-3 also separates from the compressible ball head 7-1-2, and then the driven wheel 2-3 can easily rotate counterclockwise. Take out the old catheter and install a new one. The outer surface of the driven wheel 2-3 has a 2-3 mm soft material to accommodate catheters of different sizes and types.

[0035] By repeating the above actions, the installation, replacement, and clamping and fixing of the catheter can be realized. Embodiment

[0036] To realize the advancement and retraction movements of different types of catheters. The bevel gear A 3-3 is installed on the driving wheel mounting shaft 3-1 and fixed and locked by a flat key and a screw. The bevel gear B 3-4 is installed on the bevel gear mounting shaft 3-5 and fixed and locked by a flat key and a screw. The bevel gear mounting shaft 3-5 is connected to the motor to drive the bevel gear to rotate, thereby driving a pair of rollers to rotate relatively. When driving the catheter to move, it is necessary to ensure that the knob 2-1-1 is rotated to the indicated position on the housing to clamp and fix the catheter, otherwise slipping will occur. Reminders can be made through means such as laser light identification and camera identification. Start the motor to drive the bevel gear mounting shaft 3-5 to rotate clockwise, thereby driving the bevel gear B 3-4 to rotate. Through tooth meshing, drive the bevel gear A 3-3 to rotate, thereby driving the driving wheel 3-2 to rotate counterclockwise. At this time, the driving wheel and the driven wheel are in contact, and the driven wheel is driven to rotate clockwise through friction, thereby advancing the catheter movement forward. When the catheter needs to move backward, start the motor to rotate counterclockwise. Repeating the whole set of actions realizes the advancement and retraction movements of the catheter. Embodiment

[0037] To realize the one-time replacement and installation of the operation box. The operation box covers and supports the internal structure through the track support cover 4 and the housing 5 and is locked by screws. The operation box is small in size, simple in structure, and low in cost. Each operation box is sterilized and disinfected, and one box per person can be achieved to avoid cross-infection. The operation box is only externally connected to the motor drive, and the installation connection is also simple.

[0038] In summary, the present invention can quickly realize the operation control of the catheter, advancement, retraction, and clamping and fixing, which maximally meets the clinical use requirements; at the same time, the operation box is small in size and low in cost, and can support the use of a new sterile box for each operation, effectively solving the problem of difficult repeated disinfection.

[0039] The present invention is not limited by the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An aseptic box for controlling a catheter, characterized in that: It includes a driven wheel assembly (2), a driving wheel assembly (3) and a box body. A conduit track is provided on the top surface of the box body for placing a conduit (6). The driven wheel assembly (2) and the driving wheel assembly (3) are respectively arranged on both sides of the conduit track and are located inside the box body. The driven wheel assembly (2) includes a driven wheel support rotating member (2-1) and a driven wheel (2-3). The driven wheel support rotating member (2-1) is connected to the box body through a rotating shaft and rotates around the rotating shaft. The driven wheel (2-3) is fixed on the driven wheel support rotating member (2-1) and freely rotates around the mounting shaft. The driving wheel assembly (3) includes a driving wheel mounting shaft (3-1) and a driving wheel (3-2). The driving wheel (3-2) is mounted on the driving wheel mounting shaft (3-1), and the driving wheel mounting shaft (3-1) is connected to the box body. The conduit (6) passes between the driven wheel (2-3) and the driving wheel (3-2). The driven wheel (2-3) rotates counterclockwise or clockwise with the driven wheel support rotating member (2-1) and separates from or approaches the driving wheel (3-2), thereby realizing the installation and replacement of the conduit (6), and clamping and fixing the conduit (6) when the driven wheel (2-3) is in close contact with the driving wheel (3-2). The box body is composed of a housing (5) and a track support cover (4) covering the housing (5). The conduit track is arranged in the middle of the top surface of the track support cover (4). The driven wheel support rotating member (2-1) includes a knob (2-1-1), a pressing rotating shaft (2-1-2), a support rotating substrate (2-1-3), a moving chute (2-1-4), a driven wheel mounting shaft (2-1-5) and a support rotating shaft (2-1-6). A moving chute (2-1-4) is provided in the middle of the support rotating substrate (2-1-3). A driven wheel mounting shaft (2-1-5) is installed on one side of the support rotating substrate (2-1-3), and a support rotating shaft (2-1-6) is installed on the other side of the support rotating substrate (2-1-3). A knob (2-1-1) is installed at the top of the support rotating shaft (2-1-6). The bottom end of the support rotating shaft (2-1-6) passes through the back surface of the support rotating substrate (2-1-3) and is connected to the box body. A horizontal pressing rotating shaft (2-1-2) is installed in the middle of the support rotating shaft (2-1-6). The driven wheel (2-3) is installed on the driven wheel mounting shaft (2-1-5) and freely rotates around the driven wheel mounting shaft (2-1-5). A pressing rotating roller sleeve (2-2) is installed on the pressing rotating shaft (2-1-2) through a circlip. The pressing rotating roller sleeve (2-2) freely rotates around the pressing rotating shaft (2-1-2). The pressing rotating roller sleeve (2-2) is located above the moving chute (2-1-4). The support rotating shaft (2-1-6) passes through the round holes on the housing (5) and the track support cover (4) and is fixed on the substrate of the housing (5). The driven wheel assembly (2) rotates around the support rotating shaft (2-1-6) by rotating the knob (2-1-1).It further includes a positioning and fixing component (7), and the positioning and fixing component (7) is composed of a positioning and fixing member (7-1), a spring A (7-2) and a spring B (7-3). The positioning and fixing member (7-1) includes a compression substrate (7-1-1), a compressible ball head (7-1-2), a guide shaft A (7-1-3) and a guide shaft B (7-1-4). The head of the compression substrate (7-1-1) is equipped with the compressible ball head (7-1-2), and the tail of the compression substrate (7-1-1) is provided with the mutually parallel guide shaft A (7-1-3) and guide shaft B (7-1-4). The spring A (7-2) and the spring B (7-3) are respectively connected to the bottoms of the guide shaft A (7-1-3) and the guide shaft B (7-1-4). The positioning and fixing member (7-1) is installed on the housing (5) through the guide shaft A (7-1-3) and the guide shaft B (7-1-4), and contacts and separates from the moving chute (2-1-4) through the compressible ball head (7-1-2); the compressible ball head (7-1-2) is composed of a ball and a spring, the spring is arranged between the compression substrate (7-1-1) and the ball, and the ball relies on the spring compression; the driving wheel assembly (3) further includes a bevel gear A (3-3), a bevel gear B (3-4) and a bevel gear mounting shaft (3-5). The bevel gear A (3-3) and the bevel gear B (3-4) are perpendicular to each other and are meshed and connected. The bevel gear A (3-3) is installed on the driving wheel mounting shaft (3-1) and is fixed and locked through a flat key and a screw. The bevel gear B (3-4) is installed on the bevel gear mounting shaft (3-5) and is fixed and locked through a flat key and a screw. The bevel gear mounting shaft (3-5) is connected to the motor output end of the motion control component (1). The bevel gear mounting shaft (3-5) rotates under the drive of the motor, thereby driving the bevel gear B (3-4) to rotate. The bevel gear B (3-4) drives the bevel gear -A (3-3) to rotate, thereby driving the driving wheel (3-2) to rotate. When the driving wheel (3-2) is in contact with the driven wheel (2-3), it drives the driven wheel (2-3) to rotate through friction, thereby realizing the forward and withdrawal movements of the catheter (6).;

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