Medical instrument composite conduit FEP heat shrink tube peeling tool
By designing a base and blade position adjustment mechanism in coordination, precise peeling of FEP heat shrink tubing is achieved, solving the problem of uncontrollable blade cutting depth and reducing defect rate and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BOZHOU HUAYAO MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-05
AI Technical Summary
Existing mechanical stripping tools have uncontrollable blade penetration depth, which can damage composite tubing or prevent effective stripping of FEP heat shrink tubing, and are also costly.
A stripping tool for FEP heat shrink tubing composite catheters of medical devices was designed, including a base, a blade, and a blade position adjustment mechanism. Through the cooperation of the inclined plane and the stop, the blade position adjustment mechanism can precisely control the cutting depth of the blade to avoid damage to the internal catheter.
It achieves precise control over the blade's cutting depth, reduces defect rate and cost, improves peeling efficiency, and avoids catheter damage.
Smart Images
Figure CN224196924U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of medical catheter processing equipment, and in particular to a stripping tool for FEP heat shrink tubing, a composite catheter for medical devices. Background Technology
[0002] Currently, after the composite tubing is formed, the FEP heat shrink tubing needs to be peeled off, which is usually done by three methods: manual peeling, mechanical peeling, and tearable heat shrink tubing.
[0003] Tearable heat shrink tubing has a good peeling effect, but it has the disadvantage of high cost, which is about 3-7 times that of ordinary heat shrink tubing. Manual peeling has the following problems: 1. Low peeling efficiency (takes about 15-30 minutes per piece); 2. The tubing is easily scratched due to uneven cutting force of the blade controlled by the human hand (defect rate >15%).
[0004] Therefore, mechanical peeling is a better choice, but existing mechanical peeling tools have drawbacks: the blade's cutting depth is uncontrollable, which can cause product damage or fail to peel effectively. Therefore, there is an urgent need for a peeling tool with precise and controllable cutting depth to achieve rapid peeling of the FEP layer while avoiding damage to the catheter. Utility Model Content
[0005] In view of this, the present invention provides a stripping tool for FEP heat shrink tubing of medical device composite catheters to solve the problem of uncontrollable blade cutting depth in existing mechanical stripping tools.
[0006] This utility model provides a stripping tool for FEP heat shrink tubing of medical device composite catheters, including a base, a blade, and a blade position adjustment mechanism. The base has a channel penetrating through opposite sides for inserting the tubing to be stripped. The base surface has an inclined surface that forms an angle with the central axis of the tubing to be stripped within the channel. A stop block protrudes from the base. The side of the blade is attached to the side of the stop block, and the bottom edge of the blade is attached to the inclined surface. The tip of the blade contacts the tubing extending from the channel. The blade position adjustment mechanism is disposed on the stop block or the base and is used to adjust the position of the blade along the length of the inclined surface.
[0007] Optionally, the angle between the inclined plane and the central axis of the pipe to be peeled in the channel is 30°-60°.
[0008] Optionally, the channel is a through groove in which the pipe to be peeled extends out from the bottom edge of the inclined surface.
[0009] Optionally, the through groove is an arc-shaped groove.
[0010] Optionally, the radius of curvature of the arc groove is 1.05-1.15 times the outer diameter of the pipe to be peeled.
[0011] Optionally, the channel is a through hole, and the inner wall of the through hole slides in fit with the outer wall of the pipe to be peeled, with the pipe to be peeled extending above the bottom edge of the inclined surface in the through hole.
[0012] Optionally, the blade position adjustment mechanism includes a screw and a slotted hole. The screw is threaded onto the stop block, and the slotted hole is disposed on the blade parallel to the inclined surface.
[0013] Optionally, the blade position adjustment mechanism includes a waist-shaped hole, a guide post, and a clamping cap; the waist-shaped hole is parallel to the inclined surface and is disposed on the blade; the guide post is vertically fixed to the side of the stop block, and the side wall of the guide post slides in cooperation with the inner walls of the opposite sides of the waist-shaped hole; the clamping cap is threadedly connected to the guide post, and the blade is located between the clamping cap and the stop block, and the clamping cap is used to press the blade against the side of the stop block.
[0014] Optionally, the blade position adjustment mechanism includes a stud and a pressure plate. The stud is fixed to the side of the stop block, and the pressure plate is threaded to the stud. The blade is located between the pressure plate and the stop block, and the pressure plate is used to press the blade against the side of the stop block.
[0015] Optionally, the blade position adjustment mechanism includes a nut seat fixed to the side of the stop block, a screw threadedly connected to the nut seat, the axis of the screw being parallel to the inclined plane, and the screw being connected to the blade via a bearing.
[0016] The technical solution of this utility model has the following advantages:
[0017] 1. The blade position adjustment mechanism allows the blade to move along the side of the stop block and along the bottom edge of the slope, thereby controlling the distance between the blade tip and the pipe to be stripped. This achieves precise and controllable blade cutting depth, adapts to different FEP pipes, and does not scratch the internal conduit.
[0018] 2. The curvature of the arc groove is adapted to the pipe to be peeled, thus avoiding extrusion deformation of the pipe. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1This is a front view of the medical device composite catheter FEP heat shrink tubing stripping tool in Example 1.
[0021] Figure 2 This is a top view of the medical device composite catheter FEP heat shrink tubing stripping tool in Example 1.
[0022] Figure 3 This is a right view of the base in Embodiment 1.
[0023] Figure 4 This is a front view of the medical device composite catheter FEP heat shrink tubing stripping tool in Example 1.
[0024] Figure 5 This is a right view of the base in Embodiment 1.
[0025] Figure 6 This is a schematic diagram of the second blade position adjustment mechanism in Embodiment 1.
[0026] Figure 7 This is a schematic diagram of the third blade position adjustment mechanism in Embodiment 1.
[0027] Figure 8 This is a schematic diagram of the blade position adjustment mechanism in Embodiment 2.
[0028] Figure 9 This is a schematic diagram of the blade position adjustment mechanism in Embodiment 3.
[0029] In the diagram: base 1, inclined plane 11, channel 12, blade 2, waist-shaped hole 21, stop block 3, screw 41, guide post 42, clamping cap 43, stud 44, pressure plate 45, nut seat 46, screw 47, bearing 48;
[0030] 100 pipes to be peeled. Detailed Implementation
[0031] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.
[0032] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.
[0033] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar attributes, not to indicate or imply relative importance or a specific order.
[0035] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0036] Example 1
[0037] Please refer to Figure 1 and Figure 2 This utility model provides a stripping tool for FEP heat shrink tubing of medical device composite catheters, including a base 1. The bottom surface of the base 1 is flat, and a stop 3 is protruding from the top surface of the base 1. The side surface of the stop 3 is flat and forms an angle (including acute angle, right angle and obtuse angle) with the bottom surface of the base 1. A right angle is preferred. A blade 2 is attached to the side surface. The side surface of the blade 2 is slidably attached to the side surface of the stop 3, and the blade edge of the blade 2 faces the bottom surface of the base 1.
[0038] Please refer to Figure 1 An inclined surface 11 is provided on the top surface of the base 1, and the angle between the inclined surface 11 and the central axis of the pipe 100 to be stripped in the channel 12 is 30°-60°. In the width direction, the inclined surface 11 extends at least to the bottom edge of the side of the stop 3; in the length direction, the lowest point of the inclined surface 11 is located at the edge of the bottom surface of the base 1. The bottom edge of the blade 2 is attached to the inclined surface 11, and a blade position adjustment mechanism is provided on the base 1 or the stop 3. The blade position adjustment mechanism is used to adjust the position of the blade 2 along the length direction of the inclined surface 11.
[0039] Please refer to Figure 3 The base 1 is provided with a channel 12 that runs through the front and rear sides of the base 1. The channel 12 is for passing through the pipe 100 to be stripped (see Figure 1 ).
[0040] Please refer to Figure 1 The tip of the blade 2 extends into the extension range of the channel 12 and contacts the stripped pipe 100 extending out of the channel 12.
[0041] Specifically, channel 12 can be a through hole or a through slot.
[0042] Please refer to Figure 4 and Figure 5 When the channel 12 adopts a through hole, the through hole is a circular hole, the inner wall of the through hole slides with the outer wall of the pipe to be peeled 100, the base 1 can move along the axial direction of the pipe to be peeled 100, one end of the through hole passes through the inclined surface 11, and the pipe to be peeled 100 in the through hole extends above the bottom edge of the inclined surface 11.
[0043] Please refer to Figure 1 and Figure 3 When channel 12 adopts a through groove, the pipe 100 to be peeled extends out from the bottom edge of the inclined surface 11 in the through groove. The through groove is an arc groove, that is, the cross-section of the through groove is arc-shaped, and the radius of curvature of the arc is 1.05-1.15 times the outer diameter of the pipe 100 to be peeled. Under this radius of curvature, the curvature of the arc groove can be perfectly matched with the pipe 100 to be peeled, avoiding the inner wall of the arc groove from causing extrusion deformation of the pipe 100 to be peeled.
[0044] The blade position adjustment mechanism includes a screw 41 and a slotted hole 21. The slotted hole 21 is located on the blade 2, and its axis is parallel to the inclined plane 11. A threaded hole is provided on the side of the stop block 3 along the axis of the slotted hole 21. The screw 41 is connected to the threaded hole and presses the blade 2 firmly to the side of the stop block 3. When it is necessary to adjust the depth of the blade 2 cutting into the pipe 100 to be peeled, loosen the screw 41, move the bottom edge of the blade 2 along the inclined plane 11, adjust the blade 2 to the designated position, and then tighten the screw 41. The blade 2 is designed to extend 0.15-0.25mm into the channel 12 to ensure that the FEP is cut to a depth of about 0.2mm, thereby cutting through the FEP and allowing it to be peeled off without damaging the internal pipe.
[0045] Optional, please refer to Figure 6 and Figure 1 Alternatively, guide post 42 and clamping cap 43 can be used to replace screw 41; guide post 42 is vertically fixed to the side of stop 3 and the axis of waist-shaped hole 21, the diameter of guide post 42 matches the width of waist-shaped hole 21, and the side wall of guide post 42 slides with the inner walls of opposite sides of waist-shaped hole 21; clamping cap 43 is connected to guide post 42 by thread, the diameter of clamping cap 43 is larger than the width of waist-shaped hole 21, and blade 2 is located between clamping cap 43 and stop 3, clamping cap 43 is used to press blade 2 against the side of stop 3.
[0046] Optional, please refer to Figure 7 Alternatively, the blade 2 may not have a waist-shaped hole 21. Instead, the threaded hole can be set close to the upper edge of the blade 2, so that the screw 41 in the threaded hole can press the bottom edge of the blade 2 onto the inclined surface 11. Tightening the screw 41 will press the blade 2 onto the side of the stop block 3.
[0047] The medical device composite catheter FEP heat shrink tubing peeling tool proposed in this embodiment, when in use, keeps the tubing 100 to be peeled stationary and pushes the base 1 forward, so that the blade 2 cuts through the FEP to achieve the purpose of peeling; the blade position adjustment mechanism can move the side of the blade 2 against the stop block 3 and the bottom edge of the blade 2 against the inclined surface 11, thereby controlling the distance between the tip of the blade 2 and the tubing 100 to be peeled, realizing precise and controllable cutting depth of the blade 2, which can adapt to different FEP tubing materials and does not scratch the internal catheter; it solves the problems of high cost, long peeling time and product damage in traditional peeling methods, thereby reducing the defect rate and reducing costs.
[0048] Example 2
[0049] Please refer to Figure 8 This embodiment provides a medical device composite catheter FEP heat shrink tubing stripping tool based on embodiment 1, the difference being the different blade position adjustment mechanism.
[0050] The blade position adjustment mechanism of this embodiment includes a stud 44 and a pressure plate 45. The stud 44 is fixed to the side of the stop block 3, and the pressure plate 45 is located outside the blade 2. The blade 2 is located between the pressure plate 45 and the stop block 3. The pressure plate 45 is provided with a threaded hole, and the stud 44 is connected to the threaded hole. The pressure plate 45 can rotate around the axis of the stud 44, and the pressure plate 45 will not interfere with the inclined surface 11 when it rotates. When the pressure plate 45 rotates to a position close to the root of the stud 44, the blade 2 can be pressed tightly against the side of the stop block 3.
[0051] When it is necessary to adjust the depth of the blade 2 into the pipe 100 to be stripped, rotate the pressure plate 45 to make the blade 2 movable, and then move the blade 2 along the inclined surface 11 to the designated position, and then reverse the pressure plate 45 to press the blade 2.
[0052] Example 3
[0053] Please refer to Figure 9 This embodiment provides a medical device composite catheter FEP heat shrink tubing stripping tool based on embodiment 1, the difference being the different blade position adjustment mechanism.
[0054] The blade position adjustment mechanism of this embodiment includes a nut seat 46, a screw 47, and a bearing 48. The nut seat 46 protrudes and is fixed to the side of the stop block 3. The nut seat 46 and the blade 2 are located on the same side of the stop block 3. The nut can be directly fixed to the side of the stop block 3 as the nut seat 46. The screw 47 is connected inside the nut seat 46. The axis of the screw 47 must be parallel to the inclined plane 11. One end of the screw 47 points to the blade 2. This end of the screw 47 is fixedly connected to the inner ring of the bearing 48. The outer ring of the bearing 48 is fixed to the blade 2. Alternatively, the blade 2 can be fixed to the inner ring of the bearing 48, and the screw 47 can be fixed to the outer ring of the bearing 48. It is only necessary to ensure that the screw 47 can move together with the blade 2 when rotating.
[0055] When it is necessary to adjust the depth of the blade 2 into the pipe 100 to be stripped, rotate the screw 47 so that the screw 47 moves along the axis of the nut seat 46, thereby driving the blade 2 to move along the length of the inclined plane 11. After adjusting the blade 2 to the specified position, stop rotating the screw 47.
[0056] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A stripping tool for FEP heat shrink tubing used in medical devices, characterized in that, The device includes a base, a blade, and a blade position adjustment mechanism. The base has a channel extending through its two opposite sides for inserting a pipe to be peeled. The base surface has an inclined surface that forms an angle with the central axis of the pipe to be peeled within the channel. A stop block protrudes from the base. The side of the blade is attached to the side of the stop block, and the bottom edge of the blade is attached to the inclined surface. The tip of the blade contacts the pipe to be peeled extending from the channel. The blade position adjustment mechanism is located on the stop block or the base and is used to adjust the position of the blade along the length of the inclined surface.
2. The medical device composite catheter FEP heat shrink tubing stripping tool according to claim 1, characterized in that, The angle between the inclined plane and the central axis of the pipe to be peeled in the channel is 30°-60°.
3. The medical device composite catheter FEP heat shrink tubing stripping tool according to claim 1, characterized in that, The channel is a through groove, in which the pipe to be peeled extends out from the bottom edge of the inclined surface.
4. The medical device composite catheter FEP heat shrink tubing stripping tool according to claim 3, characterized in that, The through groove is an arc-shaped groove.
5. The medical device composite catheter FEP heat shrink tubing stripping tool according to claim 4, characterized in that, The radius of curvature of the arc-shaped groove is 1.05-1.15 times the outer diameter of the pipe to be peeled.
6. The medical device composite catheter FEP heat shrink tubing stripping tool according to claim 1, characterized in that, The channel is a through hole, and the inner wall of the through hole slides in fit with the outer wall of the pipe to be peeled. The pipe to be peeled extends out of the through hole above the bottom edge of the inclined surface.
7. The medical device composite catheter FEP heat shrink tubing stripping tool according to any one of claims 1-6, characterized in that, The blade position adjustment mechanism includes a screw and a slotted hole. The screw is threaded onto the stop block, and the slotted hole is parallel to the inclined surface and located on the blade.
8. The medical device composite catheter FEP heat shrink tubing stripping tool according to any one of claims 1-6, characterized in that, The blade position adjustment mechanism includes a waist-shaped hole, a guide post, and a clamping cap; the waist-shaped hole is parallel to the inclined surface and is disposed on the blade; the guide post is vertically fixed to the side of the stop block, and the side wall of the guide post slides in cooperation with the inner walls of the opposite sides of the waist-shaped hole; the clamping cap is threadedly connected to the guide post, and the blade is located between the clamping cap and the stop block, and the clamping cap is used to press the blade against the side of the stop block.
9. The medical device composite catheter FEP heat shrink tubing stripping tool according to any one of claims 1-6, characterized in that, The blade position adjustment mechanism includes a stud and a pressure plate. The stud is fixed to the side of the stop block, and the pressure plate is threaded to the stud. The blade is located between the pressure plate and the stop block, and the pressure plate is used to press the blade against the side of the stop block.
10. The medical device composite catheter FEP heat shrink tubing stripping tool according to any one of claims 1-6, characterized in that, The blade position adjustment mechanism includes a nut seat fixed to the side of the stop block, a screw rod internally threaded onto the nut seat, the axis of the screw rod being parallel to the inclined plane, and the screw rod being connected to the blade via a bearing.