Medical catheter punching device

Abstract

The present invention relates to the field of mechanical processing technology, and specifically discloses a medical catheter punching device, comprising: an upper limit rod fixedly connected to a machine base; a push cylinder slidably connected to the machine base; a spring A fixedly connected between the push cylinder and the machine base; a mounting cylinder fixedly connected to the machine base, the mounting cylinder being arranged in the push cylinder; a rotating rod slidably and rotatably connected to the mounting cylinder, the rotating rod cooperating with a punching die; a guide groove arranged on the rotating rod; a control shaft fixedly connected to the mounting cylinder, the control shaft slidably cooperating with the guide groove; and a spring B fixedly connected to the mounting cylinder, the end of the spring B contacting the rotating rod. The present invention uses a movable rotating rod, a guide groove and a control shaft that convert the moving path of the rotating rod into a rotating path, a straight block and a slot cooperating therewith, and a push cylinder for applying a force to achieve rapid installation and removal of the punching die, thereby improving the operational convenience of replacing the punching die of the present invention.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular discloses a medical catheter punching device. Background Art

[0002] Extracorporeal membrane oxygenation (ECMO) is a life support technology that provides oxygenation and circulatory support to patients with cardiopulmonary failure through extracorporeal circulation. The catheter is a key component in the ECMO system, used to draw blood from the patient's body, oxygenate it, and then return it to the body. The ECMO catheter mainly consists of a cannula body, venous drainage tube, arterial perfusion tube, side holes, guidewire lumen, suture wings / fixture device, and connector. The side holes of the ECMO catheter are the key perforation site, and their design and location vary depending on the type of tube and its function. Cannulas that generally require perforation include venous drainage tubes, arterial perfusion tubes, and double-lumen cannulas.

[0003] Currently, medical catheter hole punching typically uses punching equipment and dies to precisely create holes of the desired shape and size to meet the needs of various applications. However, different types of cannulas have varying punching requirements, necessitating the use of punching dies of varying specifications to accommodate these diverse processing needs.

[0004] At present, the common method of fixing punching dies mainly relies on bolt connection or snap connection. However, this fixing method has obvious disadvantages: in order to ensure the stability of the die during high-speed punching, multiple sets of bolts or snaps are usually required for fixing. This makes the disassembly and installation process of the die cumbersome and time-consuming, which not only reduces production efficiency but also increases the labor intensity of operators. Summary of the Invention

[0005] The present invention provides a medical catheter punching device, which aims to solve the defect of the prior art mentioned in the above background art that the operation is troublesome when installing and disassembling the mold.

[0006] The technical solution is as follows: A medical catheter punching device comprises: a machine base;

[0007] A puncher fixedly connected to the machine base, the puncher consists of a cylinder, a fixed plate and a punching knife;

[0008] The punching die is assembled and fixedly connected to the machine base. The punching die consists of a main die sleeve, a main die core and a slot.

[0009] It also includes: an upper limit rod fixedly connected to the machine base;

[0010] A push cylinder slidably connected to the machine base;

[0011] Spring A fixedly connected between the push cylinder and the machine base;

[0012] A mounting cylinder fixedly connected to the machine base, the mounting cylinder being arranged in the push cylinder;

[0013] A rotating rod connected to the mounting cylinder is slidably and rotatably engaged with the punching die;

[0014] A guide groove provided on the rotating rod;

[0015] A control shaft fixedly connected to the mounting cylinder, the control shaft slidingly engaged with the guide groove;

[0016] And a spring B is fixedly connected in the mounting cylinder, and the end of the spring B contacts the rotating rod.

[0017] Optionally, it further comprises: a block fixedly connected to the rotating rod;

[0018] The card slot is arranged on the punching die, and the slot opening on the main die sleeve is in the shape of a straight line, and the slot opening of the card slot cooperates with the straight line block.

[0019] Optionally, it further comprises: a limiting sleeve slidably connected to the machine base, the limiting sleeve being sleeved on the limiting rod, and the limiting sleeve being provided with layers of annular grooves;

[0020] A spring C fixedly connected between the limit sleeve and the machine base;

[0021] The snap ring is arranged on the machine base, and when the snap ring moves, it is clamped into the ring groove on the limiting sleeve.

[0022] Optionally, it further comprises: a mounting frame fixedly connected to the base;

[0023] A movable frame is slidably connected to the mounting frame, and a clamping ring is fixedly connected to the movable frame;

[0024] The control knob connected to the machine base is rotated, and the control knob contacts the movable frame, and a protrusion is provided on the control knob;

[0025] Spring D is provided on the movable frame.

[0026] Optionally, it further comprises: a piston plate slidably connected to the punching die, the piston plate being arranged in a slot of the punching die;

[0027] A spring E fixedly connected between the piston plate and the punching die;

[0028] The main mold core is hollow, and a channel is provided in the punching mold, and the channel communicates the space of the slot with the space in the main mold core.

[0029] Optionally, it further comprises: a fixing ring fixedly connected to the punching die;

[0030] Rotate the connecting bars connected to the fixed ring, wherein the connecting bars have at least two groups;

[0031] Rotate the limiting wheel connected to the end of each connecting strip, the limiting wheel will abut against the conduit, and the limiting wheel can be deformed;

[0032] Rotating a rotating ring connected to the punching die;

[0033] a mounting shaft fixedly connected to the rotating ring;

[0034] Each set of connecting bars is provided with a connecting groove, and each mounting shaft is slidably connected to each connecting groove;

[0035] A spring F is fixedly connected between the fixed ring and the rotating ring.

[0036] Optionally, it further comprises: a gear ring fixedly connected to the outside of the rotating ring;

[0037] A rack is fixedly connected to the punching knife of the puncher, and the rack is engaged with the gear ring.

[0038] Optionally, it further comprises: a mounting bracket fixed on the mounting base;

[0039] A wiping block is slidably connected to the mounting frame, and the wiping blocks are distributed in a ring shape on the mounting frame;

[0040] A spring G is fixedly connected between the mounting frame and the wiping block.

[0041] The beneficial effects are: the present invention uses a movable rotating rod, a guide groove and a control shaft that convert the moving path of the rotating rod into a rotating path, a straight block and a matching card slot, and a push cylinder for applying a force to achieve rapid installation and disassembly of the punching die, thereby improving the operational convenience of replacing the punching die of the present invention.

[0042] The present invention uses a limiting sleeve for limiting the movement of the punching die and a clamping ring for fixing the position of the limiting sleeve, which limits the movement of the punching die after it is fixed, prevents the punching die from being accidentally unlocked, and improves the use stability of the present invention.

[0043] The present invention uses a movable piston plate to achieve airflow control, so that the catheter can be conveniently processed for debris after punching, thereby improving the cleanliness of the catheter after processing and improving the convenience of use of the present invention.

[0044] The present invention uses a rotating limiting wheel to fix the catheter, so that the catheter can be punched stably, improving the punching accuracy of the catheter, and the rotation of the limiting wheel is controlled by the motion trajectory of the puncher when it is used, thereby realizing automatic fixation of the catheter and improving the convenience of use of the present invention.

[0045] The present invention uses a wiping block to clean the catheter before and after punching, thereby preventing impurities from affecting the punching accuracy and facilitating the processing of the catheter after punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of the present invention.

[0047] Figure 2 This is a structural separation diagram of the puncher in the present invention.

[0048] Figure 3 This is a diagram showing the positional structure of the punching die and the fixing mechanism in the present invention.

[0049] Figure 4 It is a cross-sectional view of the matching structure of the punching die and the fixing mechanism in the present invention.

[0050] Figure 5 This is a cross-sectional view of the connection structure of the present invention when a character block is rotated to a state of cross-interlacing with the card slot.

[0051] Figure 6 Schematic diagram of the position structure of the limiting rod and the locking mechanism in the present invention.

[0052] Figure 7 This is a separate diagram of the connection structure between the limit rod and the locking mechanism in the present invention.

[0053] Figure 8 This is a cross-sectional view of the position structure of the punching die and the cleaning mechanism in the present invention.

[0054] Figure 9 It is a schematic diagram of the structure when the puncher in the present invention moves to make the gear ring and the rack cooperate.

[0055] Figure 10 This is a structural separation diagram of the limiting mechanism in the present invention.

[0056] Figure 11 This is a schematic diagram of the structure of the restriction mechanism in the present invention when restricting the catheter.

[0057] Figure 12 Schematic diagram of the connection structure of the cleaning mechanism in the present invention.

[0058] Markings in the accompanying drawings: 0-conduit, 1-machine base, 2-puncher, 201-cylinder, 202-fixed plate, 203-punching knife, 3-punching die, 301-main die sleeve, 302-main die core, 303-slot, 401-push cylinder, 402-spring A, 403-mounting cylinder, 404-rotating rod, 405-slot block, 406-card slot, 407-gasket, 408-guide groove, 409-control shaft, 410-spring B, 5-limit rod, 601-limit sleeve , 602-spring C, 603-mounting frame, 604-moving frame, 605-retaining ring, 606-control knob, 607-spring D, 701-piston plate, 702-spring E, 703-channel, 801-fixing ring, 802-connecting strip, 803-limiting wheel, 804-rotating ring, 805-mounting shaft, 806-connecting groove, 807-spring F, 808-gear ring, 809-rack, 901-mounting frame, 902-wiping block, 903-spring G. DETAILED DESCRIPTION

[0059] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Example: A medical catheter punching device, see Figure 1-Figure 2 , including: a machine base 1; a puncher 2 fixedly mounted on the machine base 1, four sets of punchers 2 are provided on the machine base 1, and the puncher 2 includes: a cylinder 201 fixedly mounted on the machine base 1; a fixing plate 202 fixedly mounted on the cylinder 201; a punching knife 203 detachably fixedly mounted on the fixing plate 202, and different punching knives 203 can be replaced according to different punching requirements of different catheters 0.

[0061] See Figure 1-Figure 2 , including: a punching die 3 detachably fixedly mounted on the machine base 1, the punching die 3 cooperates with the punching knife 203 to punch the catheter 0, the punching die 3 includes: a main die sleeve 301; a main die core 302 fixedly mounted inside the main die sleeve 301, the main die sleeve 301 and the main die core 302 are both provided with holes corresponding to the punching knife 203; a slot 303 is provided between the main die sleeve 301 and the main die core 302 for the catheter 0 to be inserted.

[0062] Insert the catheter 0 into the slot 303 of the punching die 3, start the puncher 2, and the cylinder 201 controls the punching knife 203 to move through the holes on the main die sleeve 301 and the main die core 302 to punch the catheter 0.

[0063] See Figure 3 、 Figure 4 and Figure 5, also includes: a limit rod 5 fixedly mounted on the front side of the machine base 1, the limit rod 5 is inserted into the punching die 3 to limit the position of the punching die 3 installed on the machine base 1; a fixing mechanism provided on the machine base 1, the fixing mechanism is used to detachably fix the punching die 3 on the machine base 1, and the fixing mechanism sets the punching die 3 between the four groups of punchers 2, and the fixing mechanism includes: a push cylinder 401 slidably mounted in the machine base 1; a spring A402 fixedly mounted between the push cylinder 401 and the machine base 1; a mounting cylinder 403 fixedly mounted in the machine base 1, and the mounting cylinder 403 is arranged in the push cylinder 401; a rotating rod 404 slidably and rotatably mounted on the mounting cylinder 403; a block 405 fixedly mounted on the front end of the rotating rod 404; a card slot 406 provided at the rear of the main mold sleeve 301, and the card slot 406 is in the main The notch on the die sleeve 301 is in the shape of a letter "I", and the card slot 406 cooperates with the notch of the letter "I" block 405. The function of connecting to and unlocking the connection with the punching die 3 is converted by rotating the rotating rod 404; a gasket 407 is fixedly installed at the front end of the rotating rod 404, and the gasket 407 is located behind the letter "I" block 405. The distance between the gasket 407 and the letter "I" block 405 is the thickness of the notch of the card slot 406; a guide groove 408 is arranged at the rear end of the rotating rod 404; a control shaft 409 is fixedly installed in the mounting tube 403, and the control shaft 409 is slidably matched with the guide groove 408. Under the cooperation of the control shaft 409 and the guide groove 408, the rotating rod 404 will also be controlled to rotate when it moves back and forth; a spring B410 is fixedly installed in the mounting tube 403, and the end of the spring B410 is in contact with the rotating rod 404.

[0064] When installing the punching die 3, the punching die 3 is moved backward and inserted into the limiting rod 5. The punching die 3 first contacts the push cylinder 401 and pushes the push cylinder 401 to move backward. The spring A402 is compressed. Then, the straight block 405 passes through the notch of the card slot 406 and extends into the card slot 406. It moves the rotating rod 404 backward through the gasket 407, and the spring B410 is compressed. During this process, the control shaft 409 cooperates with the guide groove 408 to control the rotation of the rotating rod 404, staggering the straight block 405 and the straight notch of the card slot 406, so that the punching die 3 cannot be separated from the rotating rod 404 and the connection is achieved;

[0065] After completion, the punching die 3 is released, and the spring A402 and the spring B410 resume deformation. Since the distance the push cylinder 401 is moved is greater than the distance the rotating rod 404 is moved, after the rotating rod 404 is reset, the spring A402 is still in a compressed state, so that the push cylinder 401 still has a tendency to move forward, that is, the push cylinder 401 applies a forward force to the punching die 3, and under the limiting action of the control shaft 409 and the guide groove 408, and the fixing action of the block 405 and the card slot 406 on the punching die 3, the punching die 3 cannot move forward. Therefore, the rotating rod 404 cooperates with the push cylinder 401 to stably fix the punching die 3 on the machine base 1.

[0066] To remove the punching die 3, the punching die 3 is moved backward, and the rotating rod 404 is controlled to rotate again, so that the block 405 rotates until it overlaps with the notch of the locking slot 406. At this time, the punching die 3 is moved forward to remove the punching die 3 from the rotating rod 404. The spring A 402 and the spring B 410 reset the push cylinder 401 and the rotating rod 404 respectively. Therefore, the use of the fixing mechanism can quickly and conveniently disassemble and assemble the punching die 3.

[0067] See Figure 1 、 Figure 6 and Figure 7 , also includes: a locking mechanism provided on the machine base 1, the locking mechanism is used to lock the punching die 3 to prevent the punching die 3 from being accidentally unlocked and fixed by the fixing mechanism, the locking mechanism includes: a limiting sleeve 601 slidably mounted on the machine base 1, the limiting sleeve 601 is sleeved on the limiting rod 5, when the punching die 3 passes through the limiting rod 5 and moves backward, it will contact the limiting sleeve 601, and the limiting sleeve 601 is provided with layers of ring grooves; a spring C602 fixedly mounted between the limiting sleeve 601 and the machine base 1; a mounting frame 603 fixedly mounted on the machine base 1; a sliding Two movable frames 604 are installed on the mounting frame 603; a snap ring 605 is fixedly installed on the two movable frames 604, and the two snap rings 605 are snapped into the ring groove on the limit sleeve 601 to limit the front and rear positions of the limit sleeve 601; a control knob 606 is rotatably installed on the machine base 1, and the control knob 606 is set between the two movable frames 604. A protrusion is set on the control knob 606, and the control knob 606 is rotated to separate the control movable frames 604 and the snap ring 605 from each other; a spring D607 is fixedly installed between the two movable frames 604.

[0068] When installing the punching die 3, first rotate the control knob 606 90 degrees, and its protrusion squeezes the two movable frames 604 apart and controls the snap ring 605 to separate, thereby unlocking the limit sleeve 601; then control the punching die 3 to move backward on the limit rod 5, the limit sleeve 601 is pushed to move backward, and the spring C602 is compressed; when the punching die 3 is fixed, reverse the control knob 606, and the spring D607 controls the two movable frames 604 to move closer, thereby clamping the snap ring 605 into the annular groove on the limit sleeve 601, fixing the front and rear positions of the limit sleeve 601. Therefore, when the punching die 3 is accidentally pushed, the punching die 3 cannot move backward, that is, it cannot unlock the fixing mechanism, thereby realizing the anti-accidental touch function.

[0069] See Figure 8 , also includes: a cleaning mechanism arranged in the punching die 3, the cleaning mechanism is used to clean the waste and debris remaining in the catheter 0 after punching, the cleaning mechanism includes: a piston plate 701 slidably installed in the slot 303; a spring E702 fixedly installed between the piston plate 701 and the main mold sleeve 301; the main mold core 302 is hollow, and a channel 703 is arranged in the main mold sleeve 301, and the channel 703 connects the space of the slot 303 with the space in the main mold core 302.

[0070] After punching is completed, the conduit 0 is pressed backward, and the piston plate 701 blows the gas between it and the main mold sleeve 301 to the center of the main mold core 302 through the channel 703, blowing the waste and debris generated during punching out of the conduit 0, thereby achieving the purpose of cleaning the conduit 0.

[0071] See Figure 1 、 Figure 9 、 Figure 10 and Figure 11, further comprising: a limiting mechanism provided between the puncher 2 and the punching die 3, the limiting mechanism being used to limit the position of the catheter 0 on the punching die 3, so that the catheter 0 can be stably punched and the accuracy of the punching is ensured, the limiting mechanism comprising: a fixing ring 801 fixedly mounted on the front side of the main die sleeve 301; a connecting strip 802 rotatably mounted on the fixing ring 801, the connecting strip 802 being provided with four groups; a limiting wheel 803 rotatably mounted at the end of each connecting strip 802, the connecting strip 802 being rotated to cause the limiting wheel 803 to abut against the catheter 0, and the limiting wheel 803 being able to deform; a rotating ring 800 rotatably mounted on the punching die 3 4; a mounting shaft 805 fixedly mounted on the rotating ring 804, with four mounting shafts 805 provided; a connecting groove 806 provided on each set of connecting strips 802, with each mounting shaft 805 being slidably connected to each connecting groove 806. When the rotating ring 804 rotates relative to the fixed ring 801, the rotation of the connecting strips 802 is controlled by the cooperation between the mounting shaft 805 and the connecting groove 806; a spring F807 fixedly mounted between the fixed ring 801 and the rotating ring 804; a gear ring 808 fixedly mounted on the outside of the rotating ring 804; a rack 809 fixedly mounted on the punching knife 203, with the rack 809 meshing with the gear ring 808.

[0072] For the punching knife 203 and the punching die 3 that cooperate with each other in the same group, the rack 809 on the punching knife 203 and the gear ring 808 on the punching die 3 also cooperate with each other. Therefore, only one set of limiting mechanisms needs to be set on the punching knife 203 and the punching die 3 in the same group.

[0073] After the catheter 0 is inserted into the punching die 3, when the puncher 2 is started to punch the catheter 0, the punching knife 203 moves toward the punching die 3. First, the gear ring 808 is controlled to move by the rack 809, and the rotating ring 804 is controlled to rotate relative to the fixed ring 801. The spring F807 is compressed, and the connecting strip 802 is controlled to rotate, so that the limiting wheels 803 on each group of rotating rings 804 are pressed against the catheter 0, so that the catheter 0 can be restricted. Subsequently, the punching knife 203 continues to move to punch the catheter 0, and the limiting wheel 803 is squeezed and deformed, so that the catheter 0 can be punched stably. After the puncher 2 completes the punching, the rack 809 moves in the opposite direction, controls the rotating ring 804 to reverse and reset, and controls the limiting wheel 803 to reset, that is, the limiting component is automatically released.

[0074] The spring F807 is provided to maintain the initial position between the rotating ring 804 and the fixed ring 801, ensuring that the rack 809 can accurately fix the catheter 0 after controlling the limiting wheel 803 to rotate.

[0075] See Figure 1 and Figure 12, also includes: a cleaning mechanism arranged on the machine base 1, the cleaning mechanism is used to clean the catheter 0, the cleaning mechanism is arranged on the front side of the punching die 3, and the cleaning mechanism includes: a mounting bracket 901 fixedly mounted on the machine base 1, the mounting bracket 901 consists of two parts, a support part and a mounting part, and the two parts can be detachably assembled together; a wiping block 902 slidably mounted on the mounting bracket 901, the wiping block 902 is annularly distributed on the mounting bracket 901; a spring G903 fixedly mounted between the mounting bracket 901 and the wiping block 902.

[0076] Before inserting the catheter 0 onto the punching die 3, the catheter 0 is first passed through the wiping block 902. During the movement of the catheter 0 relative to the wiping block 902, the wiping block 902 can clean the outer surface of the catheter 0. Cleaning the catheter 0 before punching can prevent impurities from affecting the punching accuracy, and cleaning the catheter 0 after punching can handle the residual debris on the outer surface of the catheter 0 so that the catheter 0 can be processed later. When the punching die 3 needs to be replaced, the mounting portion of the mounting bracket 901 is removed from the supporting portion and moved away from the front side of the punching die 3, and the punching die 3 can be replaced on the spot.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A medical catheter punching device comprising: Machine base (1); A puncher (2) fixedly connected to the machine base (1), the puncher (2) comprising a cylinder (201), a fixing plate (202) and a punching knife (203); A punching die (3) is assembled and fixedly connected to the machine base (1), and the punching die (3) cooperates with the puncher (2) to punch holes in the catheter (0). The punching die (3) is composed of a main die sleeve (301), a main die core (302) and a slot (303); It is characterized by further comprising: a limiting rod (5) fixedly connected to the machine base (1) for limiting the position of the punching die (3); A push cylinder (401) slidably connected to the machine base (1); A spring A (402) fixedly connected between the push cylinder (401) and the machine base (1); A mounting cylinder (403) fixedly connected to the machine base (1), wherein the mounting cylinder (403) is disposed in the push cylinder (401); A rotating rod (404) connected to the mounting cylinder (403) is slidably and rotatably engaged with the punching die (3). The rotating rod (404) cooperates with the punching die (3). The rotation of the rotating rod (404) converts the function of connecting with the punching die (3) and unlocking the connection. A guide groove (408) provided on the rotating rod (404); A control shaft (409) is fixedly connected to the installation cylinder (403), and the control shaft (409) is slidably matched with the guide groove (408). The rotation of the rotating rod (404) is controlled by the matching of the control shaft (409) and the guide groove (408); and a spring B (410) fixedly connected to the mounting cylinder (403), wherein the end of the spring B (410) contacts the rotating rod (404); It also includes: a block (405) fixedly connected to the rotating rod (404); and a clamping slot (406) provided on the punching die (3), wherein the notch of the clamping slot (406) on the main die sleeve (301) is in the shape of a straight line, and the notch of the clamping slot (406) cooperates with the straight line block (405) to enable the rotating rod (404) to connect with the punching die (3) and to unlock the connection function conversion; It also includes: a limiting sleeve (601) slidably connected to the machine base (1), the limiting sleeve (601) is sleeved on the limiting rod (5), and the limiting sleeve (601) is provided with layers of annular grooves; A spring C (602) fixedly connected between the limiting sleeve (601) and the base (1); and a snap ring (605) provided on the machine base (1), wherein the snap ring (605) moves to snap into the annular groove on the limiting sleeve (601) to limit the position of the limiting sleeve (601); It also includes: a mounting frame (603) fixedly connected to the machine base (1); A movable frame (604) is slidably connected to the mounting frame (603), and a snap ring (605) is fixedly connected to the movable frame (604); The control knob (606) connected to the machine base (1) is rotated, and the control knob (606) contacts the movable frame (604). The control knob (606) is provided with a protrusion. The control knob (606) is rotated to control the movable frame (604) and the snap ring (605) to move; And a spring D (607) is provided on the moving frame (604).

2. A medical catheter punching device according to claim 1, characterized in that: Also includes: A piston plate (701) is slidably connected to the punching die (3), and the piston plate (701) is arranged in a slot (303) of the punching die (3); and a spring E (702) fixedly connected between the piston plate (701) and the punching die (3); The main mold core (302) is hollow, and a channel (703) is provided in the punching die (3), and the channel (703) communicates with the space in the slot (303) and the space in the main mold core (302).

3. A medical catheter punching device according to claim 2, characterized in that: Also includes: A fixing ring (801) fixedly connected to the punching die (3); Rotating connecting bars (802) connected to the fixing ring (801), wherein the connecting bars (802) are provided in at least two groups; The limiting wheel (803) connected to the end of each connecting strip (802) is rotated, and the limiting wheel (803) will abut against the conduit (0), and the limiting wheel (803) can be deformed; Rotating a rotating ring (804) connected to the punching die (3); A mounting shaft (805) fixedly connected to the rotating ring (804); Each set of connecting bars (802) is provided with a connecting groove (806), and each mounting shaft (805) is slidably connected to each connecting groove (806); A spring F (807) is fixedly connected between the fixed ring (801) and the rotating ring (804).

4. A medical catheter punching device according to claim 3, characterized in that: Also includes: A gear ring (808) fixedly connected to the outside of the rotating ring (804); and a rack (809) fixedly connected to the punching knife (203) of the punching device (2), wherein the rack (809) is meshed with the gear ring (808).

5. The medical catheter punching device according to claim 4, characterized in that: Also includes: A mounting frame (901) is fixedly mounted on the machine base (1); A wiping block (902) is slidably connected to the mounting frame (901), and the wiping block (902) is distributed in a ring shape on the mounting frame (901); and a spring G (903) fixedly connected between the mounting frame (901) and the wiping block (902).

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