Catheter positioning device

Abstract

The present application provides a catheter positioning device, comprising a base fixed on a body, a positioning guide groove arranged on the base, and self-locking modules located on opposite sides or one side of the positioning guide groove. When the catheter is positioned at a preset position in the positioning guide groove, the self-locking module is in a released state. When the catheter moves relative to the positioning guide groove and deviates from the preset position, the self-locking module is triggered to switch from the released state to the locked state, so that the catheter is restricted from moving relative to the positioning guide groove by the self-locking module in the locked state, thereby achieving the technical effect of positioning the catheter.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a catheter positioning device for positioning a medical catheter at a preset position without displacement. Background Art

[0002] In the medical field, flexible catheters need to be placed in the human body after thoracic and abdominal surgery, for wound drainage, and for enteral nutrition delivery, in order to facilitate the input and output management of fluids. These catheters usually need to be securely fixed outside the human body.

[0003] At present, the commonly used catheter fixation methods are: using film products, that is, using a universal whole film to attach and fix one end of the catheter to the human skin. This method is only suitable for fixing thin and soft indwelling catheters such as intravenous infusion catheters; the other is to use radial pressure on the catheter wall to provide friction to achieve the locking and fixation of the catheter. This method is difficult to control the strength during actual operation. That is, when the radial pressure on the tube wall is increased to increase the friction locking force, the inner diameter of the catheter will inevitably become smaller due to pressure, thereby reducing the efficiency of the catheter to drain the liquid. If you want to minimize the impact on the drainage efficiency of the catheter, you must reduce the pressure on the tube wall, but this will lead to a reduction in friction on the tube wall. When the friction is reduced, the fixation effect of the catheter will be greatly affected.

[0004] Since the above two types of catheter fixation methods are not ideal, clinical medical staff currently choose to sew the catheter to the skin by suturing. This method is more painful for patients, and there is also a certain incidence of the catheter being torn off the skin, which eventually causes the catheter to shift, thus having a greater impact on the subsequent treatment of the disease.

[0005] In view of this, how to provide a catheter positioning device to overcome the various problems existing in the prior art is a technical issue to be solved in this case. Summary of the invention

[0006] In view of the above problems, the main purpose of the present application is to provide a catheter positioning device with a self-triggering locking mechanism, which can realize a unidirectional or bidirectional positioning and locking function for the catheter to prevent the catheter from being displaced.

[0007] Another object of the present application is to provide a catheter positioning device that has minimal impact on the pressure and inner cross-sectional area of ​​the catheter wall, so as to avoid affecting the drainage efficiency of the catheter.

[0008] The first embodiment of the present application provides a catheter positioning device for positioning a catheter on a body, characterized in that it comprises: a base, which is fixedly arranged on the body; a positioning guide groove, which is arranged on the base and is used to accommodate the catheter; and a plurality of self-locking modules, which are arranged on the base and located on opposite sides of the positioning guide groove, each of the self-locking modules has: a V-shaped groove and a self-locking unit movably arranged in the V-shaped groove, the first end of the self-locking unit has a contact portion that contacts the outer tube wall of the catheter arranged in the positioning guide groove, and the self-locking unit moves in the V-shaped groove to The self-locking module 13 is a self-locking module that is configured to switch between a release state and a lock state; and when the catheter is positioned at a preset position in the positioning guide groove, each of the self-locking modules is in the release state; when the catheter moves relative to the positioning guide groove and deviates from the preset position, the self-locking unit is linked in the V-shaped groove by the contact portion and the outer tube wall of the catheter that are in contact with each other, and automatically switches from the release state to the lock state, so as to limit the movement of the catheter relative to the positioning guide groove by the mutual cooperation of the self-locking modules 13 that are arranged on opposite sides of the positioning guide groove and are in the lock state.

[0009] The second embodiment of the present application provides a catheter positioning device for positioning a catheter on a body, characterized in that it comprises: a base, which is fixedly arranged on the body; a positioning guide groove, which is arranged on the base and used to accommodate the catheter; a stop module, which is arranged on the base and located on one side of the positioning guide groove; and at least one self-locking module, which is arranged on the base and located on the other side of the positioning guide groove relative to the stop module, each of the self-locking modules has: a V-shaped groove; and a self-locking unit movably arranged in the V-shaped groove and having a contact portion, the contact portion cooperates with the stop module, so that the contact portion is engaged with the stop module arranged in the positioning guide groove The self-locking unit contacts the outer tube wall of the catheter, and the self-locking unit switches between a released state and a locked state by moving in the V-shaped groove; and when the catheter is positioned at a preset position in the positioning guide groove, the self-locking unit is in the released state; when the catheter moves relative to the positioning guide groove and deviates from the preset position, the self-locking unit is linked in the V-shaped groove by the contact portion and the outer tube wall of the catheter that are in contact with each other, and automatically switches from the released state to the locked state, and the self-locking unit in the locked state cooperates with the stop module to limit the movement of the catheter relative to the positioning guide groove.

[0010] Optionally, in the above embodiments of the present application, in the self-locking module, the V-shaped groove further has a top, a first groove body side wall and a second groove body side wall extending from the top, the first groove body side wall and the second groove body side wall are used to define an active range in the V-shaped groove; the self-locking unit further has a second end relative to the first end, a self-locking unit side wall extending from the second end to the first end, the second end of the self-locking unit is positioned in the top of the V-shaped groove, the length of the self-locking unit side wall is slightly greater than the depth of the V-shaped groove, so that the contact portion slightly protrudes from the V-shaped groove to contact with the contact portion arranged in the positioning guide groove The self-locking unit contacts the outer tube wall of the catheter, and the self-locking unit reciprocates in the active range of the V-shaped groove with the second end as the axial end, and switches between the released state and the locked state, and wherein, when the self-locking unit is in the released state, the contact portion of the self-locking unit contacts the outer tube wall of the catheter; when the self-locking unit is in the locked state, the force generated by the contact portion on the outer tube wall of the catheter increases, so that the friction force generated between the contact portion and the outer tube wall increases, so as to limit the movement of the catheter relative to the positioning guide groove by the sufficient friction force generated between the contact portion and the outer tube wall.

[0011] Optionally, in the above embodiments of the present application, the self-locking unit is a sheet structure.

[0012] Optionally, in the above embodiments of the present application, the first groove body side wall of the V-shaped groove is perpendicular to the axis of the conduit arranged in the positioning guide groove, the self-locking unit has a one-way self-locking function, and wherein:

[0013] When the catheter is positioned at the preset position in the positioning guide groove, the self-locking unit side wall of the self-locking unit approaches the second slot body side wall or abuts against the second slot body side wall, the contact portion of the self-locking unit contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; when the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit side wall of the self-locking unit rotates from the second slot body side wall to the first slot body side wall to approach the first slot body side wall or abut against the first slot body side wall, the force exerted by the contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state.

[0014] Optionally, in the above embodiments of the present application, the V-shaped groove further has a groove body reference center plane with equal angles to the first groove body side wall and the second groove body side wall, the groove body reference center plane is perpendicular to the axis of the catheter arranged in the positioning guide groove, and the self-locking unit has a two-way self-locking function, and wherein; when the catheter is positioned at the preset position in the positioning guide groove, the self-locking unit side wall of the self-locking unit is close to the first groove body side wall or the second groove body side wall, or abuts against the first groove body side wall or the second groove body side wall, the self-locking unit The contact portion contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; when the catheter moves in a first direction relative to the positioning guide groove or in a second direction opposite to the first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit side wall of the self-locking unit rotates from the first slot body side wall or the second slot body side wall toward the direction of the slot body reference center plane to approach the slot body reference center plane, the force exerted by the contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state.

[0015] Optionally, in the above embodiments of the present application, the self-locking unit is a V-shaped piece structure and has a second end, two first ends, a first self-locking unit side wall and a second self-locking unit side wall extending from the second end to the two first ends respectively, a first contact portion and a second contact portion respectively arranged on the two first ends, and a self-locking unit reference center plane having equal angles with the first self-locking unit side wall and the second self-locking unit side wall respectively; the V-shaped groove also has a groove body reference center plane having equal angles with the first groove body side wall and the second groove body side wall respectively, the groove body reference center plane is perpendicular to the axis of the catheter arranged in the positioning guide groove, the opening angle of the self-locking unit is slightly smaller than the opening angle of the V-shaped groove, the self-locking unit has a bidirectional self-locking function, and wherein, when the catheter is positioned at the preset position in the positioning guide groove, the self-locking unit reference center plane of the self-locking unit is close to the groove body reference center plane or coincides with the groove body reference center plane, and the first contact portion and the second contact portion of the self-locking unit The contact portion contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; when the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit reference center plane of the self-locking unit rotates from the groove body reference center plane to the direction of the first groove body side wall, so that the first self-locking unit side wall of the self-locking unit approaches or abuts against the first groove body side wall of the V-shaped groove, the force generated by the second contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state; or when the positioning guide groove of the catheter moves in a second direction opposite to the first direction and deviates from the preset position, the self-locking unit reference center plane of the self-locking unit rotates from the groove body reference center plane to the direction of the second groove body side wall, so that the second self-locking unit side wall approaches or abuts against the second groove body side wall of the V-shaped groove, the force generated by the first contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state.

[0016] Optionally, in the above embodiments of the present application, the self-locking unit is a V-shaped sheet structure and has a second end, two first ends, a first self-locking unit side wall and a second self-locking unit side wall extending from the second end to the two first ends respectively, and a first contact portion and a second contact portion respectively arranged on the two first ends; the first groove body side wall of the V-shaped groove is perpendicular to the axis of the catheter arranged in the positioning guide groove, the opening angle of the self-locking unit is slightly smaller than the opening angle of the V-shaped groove, the self-locking unit has a one-way self-locking function, and wherein, when the catheter is positioned at the preset position in the positioning guide groove, the second self-locking unit side wall of the self-locking unit is close to or abuts against the second groove body side wall, the first contact portion contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; when the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit rotates from the second slot body side wall toward the first slot body side wall, so that the first self-locking unit side wall approaches or abuts against the first slot body side wall, the first contact portion increases the force exerted on the outer tube wall of the catheter, and at the same time, the second contact portion contacts the outer tube wall of the catheter and increases the force exerted on the outer tube wall of the catheter, so as to limit the movement of the catheter relative to the positioning guide groove by the first contact portion and the second contact portion, and the self-locking unit switches from the released state to the locked state.

[0017] Optionally, in the above-mentioned embodiments of the present application, the self-locking module also has a substrate, and the self-locking unit is formed by bending and extending from the body of the substrate, wherein: the V-shaped groove also has a top, a first groove body side wall and a second groove body side wall extending from the top, wherein the top is also provided with a gap, and the first groove body side wall is perpendicular to the axis of the catheter arranged in the positioning guide groove; the substrate is arranged on the base and is located on the outside of the V-shaped groove, and the self-locking unit bent and extended from the substrate can pass through the gap and extend from the outside of the V-shaped groove to the inside of the V-shaped groove, and reciprocate within the active range defined by the first groove body side wall and the second groove body side wall, and the contact portion arranged on the first end of the self-locking unit slightly protrudes from the V-shaped groove 131 and contacts with the outer tube wall of the catheter arranged in the positioning guide groove; wherein, when the catheter is positioned at the preset position in the positioning guide groove When the guide tube moves relative to the positioning guide groove to deviate from the preset position and is in the deviated position, the self-locking unit rotates from the second groove side wall to the first groove side wall to approach the first groove side wall or abut against the first groove side wall, so that the self-locking unit switches from the released state to the locked state, and the substrate is deformed; and wherein, when the guide tube is restored to the preset position from the deviated position, the deformed substrate provides a self-resetting force to the self-locking unit, so that the self-locking unit rotates from the first groove side wall to the second groove side wall to approach the second groove side wall or abut against the second groove side wall again, so that the self-locking module automatically returns to the released state.

[0018] Optionally, in the above embodiments of the present application, the shape of the contact portion is adapted to the shape of the outer tube wall of the catheter.

[0019] Optionally, in the above embodiments of the present application, the catheter is a circular structure, the contact portion is an arc-shaped structure, and the contact portion also has a first end located at the bottom of the positioning guide groove and a second end located at the slot mouth of the positioning guide groove, wherein the length of the second end is slightly shorter than the length of the first end so that the catheter can be installed in the positioning guide groove.

[0020] Optionally, in the above-mentioned embodiments of the present application, when the self-locking unit is in the locked state, the arc surface portion in the arc structure of the contact portion generates a force on the outer tube wall of the catheter along a third direction, and at the same time, the first end and the second end of the contact portion respectively generate a force on the outer tube wall of the catheter along a fourth direction perpendicular to the third direction.

[0021] Optionally, in the above embodiments of the present application, the self-locking modules are arranged on opposite sides of the positioning guide groove in pairs or in a staggered manner.

[0022] Optionally, in the above-mentioned embodiments of the present application, the positioning guide groove further has a limiting portion for limiting the positioning of the catheter in the positioning guide groove.

[0023] Optionally, in the above-mentioned embodiments of the present application, the limiting portion is a wavy groove edge arranged at the groove opening of the positioning guide groove.

[0024] Optionally, in the above-mentioned embodiments of the present application, a plurality of auxiliary positioning units are further provided in the positioning guide groove, for assisting the positioning of the catheter at the preset position in the positioning guide groove.

[0025] Optionally, in the above embodiments of the present application, the self-locking unit is made of a polymer material, a metal material, or a combination of a polymer material and a metal material.

[0026] Optionally, in the above-mentioned embodiments of the present application, the catheter positioning device further comprises a position adjustment component for adjusting the position of the self-locking module or the stop module disposed on the base.

[0027] Optionally, in the above embodiments of the present application, the base is a thin base.

[0028] Optionally, in the above embodiments of the present application, the base is a thick base having an upper surface and a side surface, and the self-locking module and / or the positioning guide groove may be arranged on the upper surface and / or the side surface of the base.

[0029] Optionally, in the above embodiments of the present application, the main body is human skin, the base is fixed to the main body by adhesion, and the catheter positioning device also includes an adhesion unit, the base is fixed to the upper surface of the adhesion unit, and the lower surface of the adhesion unit has an adhesive for adhering to the main body.

[0030] Optionally, in the above-mentioned embodiments of the present application, the catheter positioning device has a plurality of the self-locking modules, wherein, when the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, a part of the self-locking modules is automatically switched from the released state to the locked state to restrict the catheter from moving relative to the positioning guide groove along the first direction; and when the catheter moves in a second direction opposite to the first direction relative to the positioning guide groove and deviates from the preset position, another part of the self-locking modules is automatically switched from the released state to the locked state to restrict the catheter from moving relative to the positioning guide groove along the second direction.

[0031] It can be seen from the above technical solutions that the catheter positioning device provided in the embodiment of the present application, by means of a self-triggering self-locking module, enables the catheter to be positioned at a preset position in the positioning guide groove, and the self-locking module is in a released state without generating significant pressure on the outer tube wall of the catheter, so that the drainage efficiency of the catheter is not affected; when the catheter is displaced in the positioning guide groove and deviates from the preset position, the self-locking module will automatically switch from the released state to the locked state to limit the movement of the catheter relative to the positioning guide groove, so as to achieve unidirectional or bidirectional catheter positioning. The self-locking module of another embodiment of the present application can also automatically return from the locked state to the released state after the external force applied to the catheter is released, thereby ensuring the drainage efficiency of the catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0033] Figure 1A A three-dimensional schematic diagram showing the overall structure of the catheter positioning device according to the first embodiment of the present application;

[0034] Figure 1B and Figure 1C Display Figure 1A A side view and a top view of a catheter positioning device;

[0035] Figure 1D To display Figure 1A An exploded schematic diagram of a catheter positioning device;

[0036] Figure 2A and Figure 2B Display separately Figure 1A Schematic diagram of the internal structure of the catheter positioning device from different perspectives when the self-locking module is in a released state;

[0037] Figure 3A and Figure 3B Display separately Figure 1A Schematic diagram of the internal structure of the catheter positioning device from different perspectives when the self-locking module is in a locked state;

[0038] Figure 3C To display Figure 3A and Figure 3B A side view of the self-locking module shown;

[0039] Figure 4A and Figure 4BSchematic diagrams showing different embodiments of the base of the catheter positioning device of the present application;

[0040] Figure 5 Different embodiments of the positioning guide groove in the catheter positioning device of the present application are shown;

[0041] FIG. 6A to FIG. 6D Different embodiments of the self-locking unit and the contact part in the catheter positioning device of the present application are shown;

[0042] 7A to 7D Different embodiments of the self-locking unit of the catheter positioning device of the present application are shown;

[0043] FIG. 8A to FIG. 8B A diagram showing an embodiment of the self-locking module of the catheter positioning device of the present application in a released state and a locked state;

[0044] FIG. 9A to FIG. 9B Another embodiment diagram showing the self-locking module of the catheter positioning device of the present application in a released state and a locked state;

[0045] Fig. 10A and Fig. 10B An embodiment diagram showing that the self-locking module of the catheter positioning device of the present application has a self-resetting effect;

[0046] Fig.11A and Fig. 11B This is a diagram showing an embodiment of an auxiliary positioning unit in the catheter positioning device of the present application;

[0047] Fig. 12A and Fig. 12B A schematic perspective view showing the overall structure of a catheter positioning device according to a second embodiment of the present application; and

[0048] FIG. 13A to FIG. 13E The figure shows an embodiment of a position adjustment component in the catheter positioning device of the present application.

[0049] Component number

[0050] 10 Catheter Positioning Device

[0051] 11. Base

[0052] 110 Heightening Unit

[0053] 12 Positioning guide groove

[0054] 121 Limiting part

[0055] 122 Auxiliary positioning unit

[0056] 13, 130a~130c Self-locking module

[0057] 13a The main body of the self-locking module

[0058] 13b Self-locking module cover

[0059] 131 V-groove

[0060] 1311 Top

[0061] 1312 first tank side wall

[0062] 1313 Second tank side wall

[0063] C1 trough reference center plane

[0064] 132 Self-locking unit

[0065] 1321 The Second End

[0066] 1322,1322a,1322b Self-locking unit side wall

[0067] C2 Self-locking unit reference center plane

[0068] 133, 133a, 133b contact portion (first end)

[0069] 1330 curved part

[0070] 1331 First End

[0071] 1332 Second End

[0072] 134 substrate

[0073] 14 Stop module

[0074] 15 Position adjustment components

[0075] 151 First position adjustment unit

[0076] 152 First fixed unit

[0077] 153 Second position adjustment unit

[0078] 154 Second fixed unit

[0079] 16 Adhesion Units

[0080] 2 Catheter

[0081] 21 Outer tube wall DETAILED DESCRIPTION

[0082] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0083] like Figure 1A As shown, the catheter positioning device 10 provided by the present application is used to position the catheter 2 on a body (not shown). In this embodiment, the body is, for example, human skin, and the catheter 2 is, for example, a medical flexible catheter that is placed in the human body after thoracic and abdominal surgery, for wound drainage, and for enteral nutrition delivery. The catheter positioning device 10 positions the exposed portion of the catheter 2 on the human skin so that the internal portion of the catheter 2 placed in the human body will not be displaced, thereby ensuring the drainage effect of the catheter 2.

[0084] Please refer to Figures 1A to 1C The catheter positioning device 10 provided in the first embodiment of the present application mainly includes a base 11 , a positioning guide groove 12 , and at least one self-locking module 13 .

[0085] The base 11 is fixedly mounted on the body (not shown). Figures 1A to 1C As shown, the base 11 can be designed as a thin base, and when the base 11 is a thin base, a portion of the conduit 2 can be arranged parallel to the surface of the body (refer to Figure 1B In another embodiment, Figure 4A and Figure 4B As shown, the base 11 can also be designed as a thick base, and when the base 11 is a thick base, a portion of the conduit 2 can be arranged vertically with the surface of the body (such as Figure 4B As shown, the invention is not limited thereto, and the conduit 2 can also be arranged on the body surface in an inclined manner by changing the inclination angle of the side of the conduit 2. In addition, the thick base 11 can be manufactured in an integrated manner according to actual use requirements, or the thick base can be indirectly manufactured by additionally providing a heightening unit 110 on the basis of the thin base 11.

[0086] It should be noted that the arrangement between the conduit 2 and the body surface does not completely depend on the thickness of the base 11. In another embodiment, Figure 5 As shown, when the base 11 is a thin base, the positioning guide groove 12 can be set as a three-dimensional arc guide groove so that a part of the conduit 2 is set perpendicular to the surface of the body.

[0087] In addition, in this embodiment, the base 11 is fixed to the body (human skin) by adhesion, for example, and the catheter positioning device 10 of the present application may further include an adhesion unit 16, such as Figures 1A to 1C As shown, the upper surface of the adhesive unit 16 is fixed to the bottom of the base 11, and the lower surface of the adhesive unit 16 has an adhesive to adhere to the body, thereby indirectly fixing the base 11 to the body. However, this is not limited to this, and other methods can be used to achieve the fixation between the base 11 and the body.

[0088] The positioning guide groove 12 is disposed on the base 11 and is used to accommodate the catheter 2. Specifically, the positioning guide groove 12 is used to accommodate a portion of the catheter 2 disposed on the surface of the body. Figure 1A As shown, the design is a planar structure. In addition, the positioning guide groove 12 can also be as shown in FIG. Figure 5 As shown, the design is a three-dimensional structure, however, it is not limited to this. In actual applications, the positioning guide groove 12 can be designed into other structural forms according to actual needs.

[0089] In addition, in order to prevent the catheter 2 from falling out of the positioning guide groove 12 during use, the positioning guide groove 12 of the present application also has a limiting portion 121, which is used to limit the catheter 2 to be positioned in the positioning guide groove 12. Figure 1A and Figure 1C As shown, in one embodiment, the limiting portion 121 can be, for example, a wave-shaped groove edge disposed at the groove opening of the positioning guide groove 12 .

[0090] The self-locking module 13 is disposed on the base 11. In this embodiment, the self-locking modules 13 can be respectively located on two opposite sides of the positioning guide groove 12. Specifically, at least one self-locking module 13 is respectively disposed on two opposite sides of the positioning guide groove 12. Figure 1A In the embodiment shown, three self-locking modules 13 are respectively arranged on opposite sides of the positioning guide groove 12, but this is not limited to the above, and the specific number of the self-locking modules 13 can be adjusted according to actual needs. Furthermore, in a preferred embodiment, the self-locking modules 13 can be arranged in pairs on opposite sides of the positioning guide groove 12 (such as Figure 2A , Figure 2B , Figure 3A and Figure 3B As shown), however, this is not limited to this. In other embodiments, the self-locking modules 13 can also be arranged on opposite sides of the positioning guide groove 12 in a staggered manner.

[0091] In addition, the positioning guide groove 12 and the self-locking module 13 can be designed into different structural forms according to different usage requirements. Figure 1A In the embodiment shown, the positioning guide groove 12 and the self-locking module 13 are both arranged on the upper surface of the thin base 11 (such as Figure 1AIn other embodiments, for example, when the base 11 is designed as a thick base, the positioning guide groove 12 and the self-locking module 13 can be set on the side of the base 11 in addition to the upper surface of the base 11. Figure 5 In the case of the three-dimensional arc-shaped guide groove structure shown, each locking module 13 can also be disposed in a three-dimensional form along the arc-shaped three-dimensional structure of the positioning guide groove 12 .

[0092] Please refer to Figure 1D , Figure 2A , Figure 2B , Figure 3A as well as Figure 3B The internal structure diagram of the self-locking module 13 shown in the figure, each locking module 13 has a V-shaped groove 131 and a self-locking unit 132. The self-locking unit 132 is movably arranged in the V-shaped groove 131, and has a contact portion 133 on the first end of the self-locking unit 132 that contacts the outer tube wall 21 of the catheter 2 arranged in the positioning guide groove 12.

[0093] In one embodiment, the self-locking unit 132 can be made of, for example, a polymer material or a metal material, or a combination of a polymer material and a metal material. In a specific embodiment, the material and structural form of the self-locking unit 132 can be determined according to the material of the catheter 2 to be fixed. For example, if the catheter 2 is made of a relatively soft material (such as a hose made of silicone, PU, ​​or TPU suitable for the abdominal cavity), the self-locking unit 132 can be made of a polymer material (such as plastic). If the catheter 2 is made of a relatively hard material (such as a hard tube made of PVC, PP, or improved PU suitable for the chest cavity), the self-locking unit 132 can be made of a metal material.

[0094] Please refer to FIG. 6A to FIG. 6D In one embodiment, the contact portion 133 can be integrally formed with the body of the self-locking unit 132 (eg Fig. 6A In other embodiments, the contact portion 133 may also be an independent portion additionally disposed on the self-locking unit 132, such as a rubber strip (such as Figure 6B In addition, the shape of the contact portion 133 is adapted to the shape of the outer tube wall 21 of the conduit 2. In the embodiment of the present case, the conduit 2 is, for example, a circular structure, and the contact portion 133 is also correspondingly designed to be an arc-shaped structure (such as FIG. 2A to FIG. 2B , FIG. 3A to FIG. 3B ,as well as FIG. 6A to FIG. 6D In addition, the contact portion 133 can also be designed as a toothed structure or a toothless structure according to actual use requirements. When the self-locking unit 132 is made of a polymer material, it is suitable to be designed as a toothless structure (such as Fig. 6A As shown), when the self-locking unit 132 is made of metal material, it is more suitable to be designed as a toothed structure (such as Figure 6C shown).

[0095] Please continue reading Figure 6C and Fig.6D In another embodiment, the contact portion 133 further has a first end 1331 located at the bottom of the positioning guide groove 12 and a second end 1332 located at the slot opening of the positioning guide groove 12, wherein the length of the second end 1332 may be slightly shorter than the length of the first end 1331 to facilitate the operation of installing the catheter 2 in the positioning guide groove 12.

[0096] Please refer to Figure 1D In the actual manufacturing process, the positioning guide groove 12 and the body 13a of the multiple self-locking modules 13 arranged on the opposite sides of the positioning guide groove 12 can be designed to be integrally formed. A plurality of V-shaped grooves 131 are formed in the body 13a of the self-locking module 13 for setting the self-locking unit 132. The self-locking module 13 also has a cover 13b, which can be covered on the body 13a of the self-locking module 13 to position the self-locking unit 132 in the V-shaped groove 131 and allow the self-locking unit 132 to be movably accommodated in the V-shaped groove 131. Figure 1D In the embodiment shown, the body 13a and the cover 13b of the self-locking module 13 are separated, but the present invention is not limited thereto. In other embodiments, the two can also be pivotally connected. In addition, in other embodiments, the above-mentioned limiter 121 can be directly formed on one side edge of the cover 13b of the self-locking module 13 near the slot of the positioning guide slot 12.

[0097] Please continue to read Figure 2A , Figure 2B , Figure 3A and Figure 3B The self-locking unit 132 of the present application can be moved in the V-shaped groove 131 to be in the released state (such as Figure 2A and Figure 2B as shown) and locked state (as shown FIG. 3A to FIG. 3CSpecifically, when the catheter 2 is positioned at the preset position in the positioning guide groove 12, each locking module 13 is in a released state. In this state, the catheter positioning device 10 has almost no effect on the pressure and inner cross-sectional area of ​​the tube wall of the catheter 2, and therefore, will not affect the drainage efficiency of the catheter 2. When the catheter 2 moves relative to the positioning guide groove 12 and deviates from the preset position, since the contact portion 133 of the self-locking unit 132 and the outer tube wall 21 of the catheter 2 are in a state of mutual contact, the friction force generated by the mutual contact between the contact portion 133 and the outer tube wall 21 can cause the self-locking unit 132 to be linked in the V-shaped groove 131, thereby automatically switching from the released state to the locked state, so as to limit the movement of the catheter 2 relative to the positioning guide groove 12 through the mutual cooperation between the respective locking modules 13 in the locked state arranged on the opposite sides of the positioning guide groove 12.

[0098] Specifically, if Figure 2B and Figure 3B As shown, the V-shaped groove 131 of the present application also has a top 1311, a first groove side wall 1312 and a second groove side wall 1313 extending from the top 1311, and the first groove side wall 1312 and the second groove side wall 1313 are used to define the active range of the self-locking unit 132 in the V-shaped groove 131.

[0099] The self-locking unit 132 has a second end 1321 relative to the first end, and a self-locking unit side wall 1322 extending from the second end 1321 to the first end (i.e., the position of the contact portion 133), and the contact portion 133 is arranged on the first end of the self-locking unit side wall 1322. The second end 1321 of the self-locking unit 132 is positioned in the top end 1311 of the V-shaped groove 131, and the length of the self-locking unit side wall 1322 can be slightly longer than the depth of the V-shaped groove 131, so that the contact portion 133 arranged on the first end slightly protrudes from the V-shaped groove 131 to contact the outer tube wall 21 of the catheter 2 arranged in the positioning guide groove 12. The self-locking unit 132 reciprocates in the active range of the V-shaped groove 131 with the second end 1321 as the shaft end, and switches between the release state and the locking state.

[0100] Among them, when the self-locking unit 132 is in the released state, the contact portion 133 of the self-locking unit 132 contacts the outer tube wall 21 of the catheter 2. In this state, the contact portion 133 hardly generates any force on the outer tube wall 21 of the catheter 2; and when the self-locking unit 132 is linked with the displacement of the catheter 2 to switch from the released state to the locked state, the force generated by the contact portion 133 on the outer tube wall 21 of the catheter 2 will gradually increase, so that the friction force generated between the contact portion 133 and the outer tube wall 21 will also gradually increase, so that the sufficient friction force generated between the contact portion 133 and the outer tube wall 21 can limit the outer tube wall 21 from sliding relative to the contact portion 133, thereby indirectly achieving the technical effect of positioning the catheter 2 in the positioning guide groove 12.

[0101] The self-locking module 13 of the present application may have a variety of structural forms and configurations. Several representative embodiments will be introduced exemplarily below. It should be noted that the following embodiments listed in this case are not intended to be exhaustive of all implementation forms of the self-locking module 13, so it is necessary to explain them first.

[0102] In one embodiment, the self-locking unit 132 of the present application is a sheet structure. In this case, the V-shaped groove 131 mainly has the following design forms:

[0103] The first design form is FIG. 2A to FIG. 2B as well as FIG. 3A to FIG. 3B As shown, in this embodiment, the first groove side wall 1312 of the V-shaped groove 131 is perpendicular to the axis of the conduit 2 disposed in the positioning guide groove 12. In this case, the self-locking unit 132 has a one-way self-locking function.

[0104] Specifically, if Figure 2A and Figure 2B As shown, when the catheter 2 is positioned at the preset position in the positioning guide groove 12, the self-locking unit side wall 1322 of the self-locking unit 132 is close to the second groove side wall 1313 or against the second groove side wall 1313. At this time, the contact portion 133 of the self-locking unit 132 contacts the outer tube wall 21 of the catheter 2, and the force generated by the contact portion 133 on the outer tube wall 21 is extremely small, and the self-locking unit 132 is in a released state.

[0105] like Figure 3A and Figure 3B As shown, when the catheter 2 moves relative to the positioning guide groove 12 in the first direction (for example, along Figure 3BWhen the self-locking unit 132 moves in the direction indicated by the arrow D1 and deviates from the preset position, the self-locking unit side wall 1322 of the self-locking unit 132 will gradually move from the second groove side wall 1313 of the V-shaped groove 131 to the direction of the first groove side wall 1312, so as to approach the first groove side wall 1312 or directly abut against the first groove side wall 1312, and during the movement of the self-locking unit side wall 1322, the force generated by the contact portion 133 on the outer tube wall 21 of the catheter 2 gradually increases, so that the self-locking unit 132 is gradually switched from the released state to the locked state. In this state, the respective locking units 132 arranged on the opposite sides of the positioning guide groove 12 and both in the locked state will restrict the catheter 2 from continuing to move relative to the positioning guide groove 12 along the direction indicated by the arrow D1, thereby realizing the one-way self-locking function.

[0106] Please refer to Figure 3C As described above, in this embodiment, the conduit 2 is a circular structure, and the contact portion 133 is an arc-shaped structure. In order to avoid the self-locking module 13 in the locked state from affecting the drainage efficiency of the conduit 2, when the self-locking unit 132 of the present application is in the locked state, the arc surface portion 1330 in the arc-shaped structure of the contact portion 133 disposed on the opposite sides of the positioning guide groove 12 can be along the third direction (i.e. Figure 3C The first end 1331 and the second end 1332 of the contact portion 133 move in a fourth direction (i.e., Figure 3C The self-locking unit 132 generates a force on the outer tube wall 21 of the catheter 2 in a circumferential manner when the self-locking unit 132 is in the locked state, so that the catheter 2 can still maintain or basically maintain its tube wall in its original state in the locked state without being easily deformed, thereby avoiding affecting the drainage efficiency of the catheter 2.

[0107] Another design form is that the V-shaped groove 131 also has a groove body reference center plane that is at the same angle to the first groove body side wall 1312 and the second groove body side wall 1313, and the groove body reference center plane is perpendicular to the axis of the catheter 2 set in the positioning guide groove 12. In this case, the self-locking unit 132 has a two-way self-locking function. Specifically, when the catheter 2 is positioned at a preset position in the positioning guide groove 12, the self-locking unit 132 is in a released state, that is, the self-locking unit side wall 1322 of the self-locking unit 132 is close to the first groove body side wall 1312 or the second groove body side wall 1313, or directly abuts against the first groove body side wall 1312 or the second groove body side wall 1313. In this state, the contact portion 133 of the self-locking unit 131 contacts the outer tube wall 21 of the catheter 2, and almost no force is generated on the outer tube wall 21; when the catheter 2 moves relative to the positioning guide groove 12 to the first groove body side wall 1312 or the second groove body side wall 1313, the self-locking unit 132 is in a released state. When the self-locking unit 132 moves in a second direction opposite to the first direction relative to the positioning guide groove 12 and deviates from the preset position, the self-locking unit side wall 1322 of the self-locking unit 132 will gradually rotate from the first groove body side wall 1312 or the second groove body side wall 1313 of the V-shaped groove 131 toward the groove body reference center plane to approach the groove body reference center plane without completely coinciding with the groove body reference center plane. At this time, the force generated by the contact portion 133 on the outer tube wall 21 of the catheter 2 also gradually increases, and the self-locking unit 132 automatically switches from the released state to the locked state. In this state, the self-locking units 132 arranged on the opposite sides of the positioning guide groove 12 and both in the locked state will restrict the catheter 2 from moving in the first direction or the second direction opposite to the first direction relative to the positioning guide groove 12, thereby realizing a two-way self-locking function. The advantage of this embodiment is that, without changing the design shape and design position of each component in the catheter positioning device 10, the self-locking movement direction of the self-locking unit 132 can be adjusted by only adjusting the setting position of the self-locking unit 132 relative to the V-shaped groove 131 when the self-locking module 13 is in the released state (that is, the self-locking unit 132 is close to or against the first groove side wall 1312, or close to or against the second groove side wall 1313), which has the characteristic of high setting flexibility.

[0108] In another embodiment, the self-locking unit 132 of the present application is designed as a V-shaped sheet structure, including: Fig. 7A and Figure 7B The symmetrical V-shaped sheet structure shown, or Figure 7C and Fig.7D The asymmetric V-shaped sheet structure shown in FIG. In this case, the main design form of the V-shaped groove 131 is as follows:

[0109] Please refer to Fig. 7A , Figure 7B , Fig. 8A and Figure 8B In the first design form, the self-locking unit 132 (such as Fig. 7A and Figure 7B As shown in FIG. 1 , the first self-locking unit has a second end 1321, two first ends, a first self-locking unit side wall 1322a extending from the second end 1321 to the two first ends, a second self-locking unit side wall 1322b, a first contact portion 133a and a second contact portion 133b respectively disposed on the two first ends, and a self-locking unit reference center plane C2 having equal angles with the first self-locking unit side wall 1322a and the second self-locking unit side wall 1322b. Fig. 8A and Figure 8B As shown, the V-shaped groove 131 also has a reference center plane C1 with equal angles to the first groove body side wall 1312 and the second groove body side wall 1313, wherein the groove body reference center plane C1 is perpendicular to the axis of the conduit 2 disposed in the positioning guide groove 12, and is Fig. 8A and Figure 8B It can be seen that the opening angle of the self-locking unit 132 (i.e., the angle formed between the side walls 1322a and 1322b of the self-locking unit) is slightly smaller than the opening angle of the V-shaped groove 131 (i.e., the angle formed between the first groove body side wall 1312 and the second groove body side wall 1313), so that the self-locking unit 132 can move in the V-shaped groove 131.

[0110] like Fig. 8A As shown, when the catheter 2 is positioned at the preset position in the positioning guide groove 12, the self-locking unit reference center plane C2 is close to the groove body reference center plane C1, or the self-locking unit reference center plane C2 and the groove body reference center plane C1 coincide with each other. At this time, the first contact portion 133a and the second contact portion 133b of the self-locking unit 132 simultaneously contact the outer tube wall 21 of the catheter 2, and the self-locking unit 132 is in a released state.

[0111] In one embodiment, when the catheter 2 moves in a first direction relative to the positioning guide groove 12 (not shown), the self-locking unit 132 will be linked with the movement of the catheter 2 in the V-groove 131, so that the self-locking unit reference center plane C2 is offset from the groove body reference center plane C1 toward the direction of the first groove body side wall 1312, so that the first self-locking unit side wall 1322a of the self-locking unit 132 is close to or abuts against the first groove body side wall 1312 of the V-groove 131. At this time, the force generated by the second contact portion 133b on the outer tube wall 21 of the catheter 2 increases, and the self-locking unit 132 will switch from a released state to a locked state to limit the movement of the catheter 2 in the first direction relative to the positioning guide groove 12.

[0112] In another embodiment, if Figure 8B As shown, when the catheter 2 moves relative to the positioning guide groove 12 in a second direction opposite to the first direction (for example, the direction indicated by the arrow D2), the self-locking unit 132 will move in the V-shaped groove 131 in the second direction ( Figure 8BThe self-locking unit 132 is rotated in the direction indicated by the arrow D2 in the middle, so that the self-locking unit reference center plane C2 is offset from the groove body reference center plane C1 to the direction of the second groove body side wall 1313. At this time, the second self-locking unit side wall 1322b of the self-locking unit 132 will gradually approach the second groove body side wall 1313 of the V-shaped groove 131 until it abuts against the second groove body side wall 1313 of the V-shaped groove 131, and the force generated by the first contact portion 133a on the outer tube wall 21 of the catheter 2 will increase, so that the self-locking unit 132 automatically switches from the released state (such as Fig. 8A shown) to locked state ( Figure 8B The first contact portion 133a and the outer tube wall 21 generate sufficient friction force to limit the conduit 2 from moving in the second direction ( Figure 8B Move in the direction indicated by the arrow D2.

[0113] Please refer to Figure 7C , Fig.7D , Fig. 9A and Fig. 9B In another design form, the self-locking unit 132 (such as Figure 7C and Fig.7D As shown in the figure, the self-locking unit 132 has a second end 1321, two first ends, a first self-locking unit side wall 1322a and a second self-locking unit side wall 1322b extending from the second end 1321 to the two first ends respectively, a first contact portion 133a and a second contact portion 133b arranged on the two first ends, and the V-shaped groove 131 is also asymmetrically arranged, that is, the first groove body side wall 1312 of the V-shaped groove 131 is perpendicular to the axis of the conduit 2 arranged in the positioning guide groove 12, and the opening angle of the self-locking unit 132 (that is, the angle formed between the first self-locking unit side wall 1322a and the second self-locking unit side wall 1322b) is also slightly smaller than the opening angle of the V-shaped groove 131 (that is, the angle formed between the first groove body side wall 1312 and the second groove body side wall 1313). In this embodiment, the self-locking unit 132 has a one-way self-locking function.

[0114] Specifically, if Fig. 9A As shown, when the catheter 2 is positioned at the preset position in the positioning guide groove 12, the second self-locking unit side wall 1322b of the self-locking unit 132 approaches or abuts against the second groove body side wall 1313 of the V-shaped groove 131. In this state, the first contact portion 133a contacts the outer tube wall 21 of the catheter 2, and the self-locking unit 132 is in a released state.

[0115] like Fig. 9B As shown, when the catheter 2 is moved relative to the positioning guide groove 12 in a first direction (eg Fig. 9BWhen the self-locking unit 132 moves from the second slot side wall 1313 to the first slot side wall 1312, the first self-locking unit side wall 1322a of the self-locking unit 132 approaches or abuts against the first slot side wall 1312. At this time, the force exerted by the first contact portion 133a on the first self-locking unit side wall 1322a on the outer tube wall 21 of the catheter 2 increases, and the second contact portion 133b on the second self-locking unit side wall 1322b also contacts the outer tube wall 21 of the catheter 2, and the force exerted on the outer tube wall 21 of the catheter 2 also gradually increases (in principle, the force exerted by the second contact portion 133b on the outer tube wall 21 of the catheter 2 is less than the force exerted by the first contact portion 133a on the outer tube wall 21 of the catheter 2), so as to limit the catheter 2 relative to the positioning guide groove 12 along the first direction ( Fig. 9B The self-locking unit 132 moves in the direction indicated by the arrow D3, thereby completing the self-locking unit 132 Fig. 9A Release status shown to Fig. 9B The automatic switching process of the locking state shown in the figure realizes the technical effect of self-triggering locking. The advantage of this embodiment is that the first contact portion 133a and the second contact portion 133b both generate friction restrictions on the movement of the catheter 2, thereby improving the positioning effect of the catheter 2.

[0116] In other embodiments of the present case, the self-locking module 13 may also have a self-resetting technical effect to prevent the self-locking module 13 in a locked state from affecting the drainage efficiency of the catheter 2 .

[0117] like Fig. 10A and Fig. 10BAs shown, in this embodiment, the self-locking module 13 further includes a base sheet 134, and the self-locking unit 132 is formed by bending and extending from the body of the base sheet 134. The V-shaped groove 131 also includes a top 1311, a first groove body side wall 1312 and a second groove body side wall 1313 extending from the top 1311, wherein the first groove body side wall 1312 of the V-shaped groove 131 is perpendicular to the axis of the conduit 2 disposed in the positioning guide groove 12. Furthermore, a slit 1314 is provided at the top end 1311 of the V-shaped groove 131. The base sheet 134 is arranged on the base 11 and is located outside the V-shaped groove 131. The self-locking unit 132 bent and extended from the base sheet 134 can pass through the slit 1314 located at the top end 1311 of the V-shaped groove 131 and extend from the outside of the V-shaped groove 131 to the inside of the V-shaped groove 131, and reciprocate within the active range defined by the first groove body side wall 1312 and the second groove body side wall 1313 of the V-shaped groove 131. The contact portion 133 provided on the first end of the self-locking unit 132 slightly protrudes from the V-shaped groove 131 and contacts the outer tube wall 21 of the catheter 2 provided in the positioning guide groove 12.

[0118] When the catheter 2 is positioned at the preset position in the positioning guide groove 12, the self-locking unit 132 is close to the second groove side wall 1313 of the V-shaped groove 131 or abuts against the second groove side wall 1313. At this time, the self-locking unit 132 is in a released state and the substrate 134 is not deformed.

[0119] When the conduit 2 is acted upon by an external force and moves relative to the positioning guide groove 12 to deviate from the preset position and be in a deviated position, the self-locking unit 132 rotates from the second groove side wall 1313 to the first groove side wall 1312 along the moving direction of the conduit 2 by means of the contact portion 133 that contacts the outer tube wall 21 of the conduit 2, so as to approach the first groove side wall 1312 of the V-shaped groove 131 or abut against the first groove side wall 1312, so that the self-locking unit 132 switches from a released state to a locked state, and in the locked state, the substrate 134 is deformed.

[0120] When the external force exerted on the catheter 2 is released and the catheter 2 is restored to the preset position from the deviated position, the deformed substrate 134 can provide a self-resetting force for the self-locking unit 132, so that the self-locking unit 132 can rotate from the first slot side wall 1312 to the second slot side wall 1313, so as to re-approach the second slot side wall 1313 or abut against the second slot side wall 1313, so that the self-locking module 13 can automatically restore from the locked state to the released state under the action of the substrate 134. Since the contact portion 133 of the self-locking unit 132 in the released state hardly exerts a force on the outer tube wall 21 of the catheter 2, it can avoid affecting the drainage efficiency of the catheter 2.

[0121] In other embodiments of the present application, in order to achieve a better positioning effect, a plurality of auxiliary positioning units 122 may be additionally provided in the positioning guide groove 12 of the present case to assist in positioning the catheter 2 at a preset position in the positioning guide groove 12. Figure 5 , Fig.11A and Fig. 11B As shown, the auxiliary positioning unit 122 of the present application can be, for example, a plurality of auxiliary positioning protrusions separately arranged on the inner side wall of the positioning guide groove 12 .

[0122] In another embodiment, the self-locking module 13 may be disposed on one side of the positioning guide slot 12 in addition to being disposed on two opposite sides of the positioning guide slot 12. Fig. 12A and Fig. 12B In this embodiment, the catheter positioning device 10 further includes a stop module 14, wherein the stop module 14 is arranged on the substrate 11 and located on one side of the positioning guide groove 12, and the self-locking module 13 is arranged on the base 11 and located on the other side of the positioning guide groove 12 relative to the stop module 14, wherein the self-locking module 13 also has a V-shaped groove 131 and a self-locking unit 132, and the self-locking unit 132 also has a contact portion 133, wherein the contact portion 133 can cooperate with the stop module 14, so that the contact portion 133 contacts the outer tube wall 21 of the catheter 2 arranged in the positioning guide groove 12. When the catheter 2 is positioned at the preset position of the positioning guide groove 12, the self-locking unit 132 is in a released state; and when the catheter 2 moves relative to the positioning guide groove 12 and deviates from the preset position, the self-locking unit 132 is linked in the V-groove 131 by the contact portion 133 and the outer tube wall 21 of the catheter 2 that are in contact with each other, and automatically switches from the released state to the locked state, and the self-locking unit 132 in the locked state cooperates with the stop module 14 to limit the movement of the catheter 2 relative to the positioning guide groove 12.

[0123] Please continue reading FIG. 13A to FIG. 13E In order to achieve the positioning effect for catheters 2 of different diameters, in another embodiment, the catheter positioning device 10 further includes a position adjustment component 15, which is used to adjust the position of the self-locking module 13 (such as Fig.13A The embodiment shown) or the stop module 14 (such as Fig. 13B In the embodiment shown in the figure, the position of the self-locking module 13 or the stopper module 14 disposed on one side of the positioning guide groove 11 can be set to a movable mode. By adjusting the specific position of the self-locking module 13 or the stopper module 14 disposed on the base 11 in the movable mode, the technical effect of adjusting the distance between the self-locking modules 13 disposed on the opposite sides of the positioning guide groove 11 (or between the self-locking module 13 and the stopper module 14) can be achieved to adapt to the catheters 2 of different diameters.

[0124] Specifically, the position adjustment assembly 15 includes a first position adjustment unit 151 and a first fixing unit 152 (such as Fig. 13C As shown), and a second position adjustment unit 153 and a second fixing unit 154 (as shown) are arranged on the bottom surface of the self-locking module 13 or the stopper module 14 (i.e., the side where the self-locking module 13 or the stopper module 14 contacts the substrate 11). Fig.13D As shown in FIG. 1 , the first position adjustment unit 151 cooperates with the second position adjustment unit 153 to adjust the position of the self-locking module 13 / stop module 14 installed on the base 11, and the first fixing unit 152 cooperates with the second fixing unit 154 to fix the self-locking module 13 / stop module 14 on the base 11. FIG. 13C to FIG. 13E As shown, in this embodiment, the first fixing unit 152 is a plurality of elliptical openings provided on the base 11, and the second fixing unit 154 is a circular slider on which the first fixing unit 152 can slide, wherein the second fixing unit 154 can switch between an unlocked state and a locked state by rotating relative to the first fixing unit 152, wherein when the second fixing unit 154 is in an unlocked state, it can slide in the first fixing unit 152 to adjust the position of the self-locking module 13 / stop module 14 installed on the base 11, and when the second fixing unit 154 is in a locked state, the second fixing unit 154 can be locked at a desired position in the first fixing unit 152, and the self-locking module 13 / stop module 14 can be fixed on the base 11. It should be noted that the structural forms of the above-mentioned first position adjustment unit 151, the first fixing unit 152, the second position adjustment unit 153 and the second fixing unit 154 are not limited to the embodiments shown in the drawings, and other structural forms can also be applied to this case.

[0125] Furthermore, in another embodiment, different self-locking modules 13 disposed on the same base 11 can achieve the limiting effect in different directions, thereby achieving the technical effect of bidirectional self-locking for the guide tube 2 of the positioning guide groove 12. Specifically, Fig. 13C As shown, in this embodiment, three self-locking modules 130a, 130b, and 130c are provided on the base 11, wherein the locking direction of the self-locking module 130a is opposite to the locking directions of the self-locking modules 130b and 130c. Therefore, when the catheter 2 moves in a first direction relative to the positioning guide groove 12 and deviates from the preset position, the self-locking module 130a will automatically switch from a released state to a locked state to restrict the catheter 2 from moving relative to the positioning guide groove 12 along the first direction; conversely, when the catheter 2 moves in a second direction opposite to the first direction relative to the positioning guide groove 12 and deviates from the preset position, the self-locking modules 130b and 130c will automatically switch from a released state to a locked state, thereby restricting the catheter 2 from moving relative to the positioning guide groove 12 along the second direction, thereby achieving the technical effect of bidirectional locking.

[0126] It can be seen from the above technical solutions that the embodiment of the present application can realize a unidirectional or bidirectional positioning function for the catheter by providing a catheter positioning device with a self-triggered locking mechanism, and when the catheter is not displaced, the catheter positioning device has little effect on the pressure and inner cross-sectional area of ​​the catheter wall, so it will not affect the drainage efficiency of the catheter. When the catheter is displaced or is about to be displaced by an external force, the self-locking unit in the catheter positioning device of the present invention can be instantly triggered to switch from a released state to a locked state, so that the friction between the catheter and the catheter positioning device is instantly increased to ensure that the catheter is securely locked to prevent it from being displaced.

[0127] In addition, the catheter positioning device provided in another embodiment of the present application can also automatically restore the self-locking unit in the catheter fixing device from the locked state to the released state after the external force on the catheter is released, so as to avoid affecting the drainage efficiency of the catheter.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A catheter positioning device, used to position a catheter on a body, characterized in that: include: A base, which is fixed on the body; A positioning guide groove, which is provided on the base and is used to accommodate the conduit; as well as A plurality of self-locking modules are arranged on the base and located on opposite sides of the positioning guide groove, each of the self-locking modules having: V-groove; as well as A self-locking unit is movably disposed in the V-shaped groove, and a first end of the self-locking unit has a contact portion that contacts the outer tube wall of the conduit disposed in the positioning guide groove, and the self-locking unit moves in the V-shaped groove to switch between a release state and a locking state; and wherein, When the catheter is positioned at a preset position in the positioning guide groove, each of the self-locking modules is in the released state; when the catheter moves relative to the positioning guide groove and deviates from the preset position, the self-locking unit is linked in the V-shaped groove by the contacting portion and the outer tube wall of the catheter, and automatically switches from the released state to the locked state, so as to limit the movement of the catheter relative to the positioning guide groove by the mutual cooperation of the self-locking modules arranged on opposite sides of the positioning guide groove and in the locked state.

2. A catheter positioning device, used to position a catheter on a body, characterized in that: include: A base, which is fixed on the body; A positioning guide groove, which is provided on the base and is used to accommodate the conduit; a stopper module, which is disposed on the base and located on one side of the positioning guide groove; and At least one self-locking module is disposed on the base and is located on the other side of the positioning guide groove relative to the stop module, and each of the self-locking modules has: V-grooves; and A self-locking unit is movably disposed in the V-shaped groove, and a contact portion is disposed on a first end of the self-locking unit, and the contact portion cooperates with the stop module so that the contact portion contacts the outer tube wall of the conduit disposed in the positioning guide groove, and the self-locking unit switches between a release state and a locking state by moving in the V-shaped groove; and wherein, When the catheter is positioned at a preset position in the positioning guide groove, the self-locking unit is in the released state; when the catheter moves relative to the positioning guide groove and deviates from the preset position, the self-locking unit is linked in the V-shaped groove by the contact portion and the outer tube wall of the catheter that are in contact with each other, and automatically switches from the released state to the locked state, and the self-locking unit in the locked state cooperates with the stop module to limit the movement of the catheter relative to the positioning guide groove.

3. The catheter positioning device according to claim 1 or 2, characterized in that: In the self-locking module, The V-shaped groove further comprises a top, a first groove body side wall and a second groove body side wall extending from the top, wherein the first groove body side wall and the second groove body side wall are used to define an active range in the V-shaped groove; The self-locking unit further comprises a second end relative to the first end, a self-locking unit side wall extending from the second end to the first end, the second end of the self-locking unit is positioned at the top end of the V-shaped groove, the length of the self-locking unit side wall is slightly greater than the depth of the V-shaped groove, so that the contact portion arranged at the first end slightly protrudes from the V-shaped groove to contact the outer tube wall of the catheter arranged in the positioning guide groove, the self-locking unit reciprocates in the active range of the V-shaped groove with the second end as the axial end, and switches between the release state and the locking state, and wherein, When the self-locking unit is in the released state, the contact portion of the self-locking unit contacts the outer tube wall of the catheter; when the self-locking unit is in the locked state, the force exerted by the contact portion on the outer tube wall of the catheter increases, so that the friction force generated between the contact portion and the outer tube wall increases, so as to limit the movement of the catheter relative to the positioning guide groove by virtue of the sufficient friction force generated between the contact portion and the outer tube wall.

4. The catheter positioning device according to claim 3, characterized in that: The self-locking unit is a sheet structure.

5. The catheter positioning device according to claim 4, characterized in that: The first groove body side wall of the V-shaped groove is perpendicular to the axis of the conduit arranged in the positioning guide groove, and the self-locking unit has a one-way self-locking function, and wherein: When the catheter is positioned at the preset position in the positioning guide groove, the self-locking unit side wall of the self-locking unit is close to or abuts against the second slot body side wall, the contact portion of the self-locking unit contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; When the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit side wall of the self-locking unit rotates from the second groove body side wall toward the first groove body side wall to approach the first groove body side wall or abut against the first groove body side wall, the force exerted by the contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state.

6. The catheter positioning device according to claim 4, characterized in that: The V-shaped groove also has a groove body reference center plane with equal angles with the first groove body side wall and the second groove body side wall, the groove body reference center plane is perpendicular to the axis of the conduit arranged in the positioning guide groove, the self-locking unit has a bidirectional self-locking function, and wherein; When the catheter is positioned at the preset position in the positioning guide groove, the self-locking unit side wall of the self-locking unit is close to the first slot body side wall or the second slot body side wall, or abuts against the first slot body side wall or the second slot body side wall, the contact portion of the self-locking unit contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; When the catheter moves in a first direction relative to the positioning guide groove or in a second direction opposite to the first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit side wall of the self-locking unit rotates from the first slot body side wall or the second slot body side wall toward the slot body reference center plane to approach the slot body reference center plane, the force exerted by the contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state.

7. The catheter positioning device according to claim 3, characterized in that: The self-locking unit is a V-shaped sheet structure, and has a second end, two first ends, a first self-locking unit side wall and a second self-locking unit side wall extending from the second end to the two first ends respectively, a first contact portion and a second contact portion respectively arranged on the two first ends, and a self-locking unit reference center plane having equal angles with the first self-locking unit side wall and the second self-locking unit side wall respectively; the V-shaped groove also has a groove body reference center plane having equal angles with the first groove body side wall and the second groove body side wall respectively, the groove body reference center plane is perpendicular to the axis of the conduit arranged in the positioning guide groove, the opening angle of the self-locking unit is slightly smaller than the opening angle of the V-shaped groove, the self-locking unit has a two-way self-locking function, and wherein, When the catheter is positioned at the preset position in the positioning guide groove, the self-locking unit reference center plane of the self-locking unit is close to or coincides with the groove body reference center plane, the first contact portion and the second contact portion of the self-locking unit contact the outer tube wall of the catheter, and the self-locking unit is in the released state; When the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit reference center plane of the self-locking unit rotates from the groove body reference center plane to the direction of the first groove body side wall, so that the first self-locking unit side wall of the self-locking unit approaches or abuts against the first groove body side wall of the V-shaped groove, the force generated by the second contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state; or when the catheter moves in a second direction opposite to the first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit reference center plane of the self-locking unit rotates from the groove body reference center plane to the direction of the second groove body side wall, so that the second self-locking unit side wall approaches or abuts against the second groove body side wall of the V-shaped groove, the force generated by the first contact portion on the outer tube wall of the catheter increases, and the self-locking unit switches from the released state to the locked state.

8. The catheter positioning device according to claim 3, characterized in that: The self-locking unit is a V-shaped sheet structure, and has a second end, two first ends, a first self-locking unit side wall and a second self-locking unit side wall extending from the second end to the two first ends respectively, and a first contact portion and a second contact portion respectively arranged on the two first ends; the first groove body side wall of the V-shaped groove is perpendicular to the axis of the guide tube arranged in the positioning guide groove, the opening angle of the self-locking unit is slightly smaller than the opening angle of the V-shaped groove, and the self-locking unit has a one-way self-locking function, and wherein, When the catheter is positioned at the preset position in the positioning guide groove, the second self-locking unit side wall of the self-locking unit approaches or abuts against the second slot body side wall, the first contact portion contacts the outer tube wall of the catheter, and the self-locking unit is in the released state; When the catheter moves in a first direction relative to the positioning guide groove and deviates from the preset position, the self-locking unit rotates from the second slot body side wall toward the first slot body side wall, so that the first self-locking unit side wall approaches or abuts against the first slot body side wall, and the force exerted by the first contact portion on the outer tube wall of the catheter is increased. At the same time, the second contact portion contacts the outer tube wall of the catheter and the force exerted on the outer tube wall of the catheter is increased, so that the catheter is restricted from moving relative to the positioning guide groove by the first contact portion and the second contact portion, and the self-locking unit is switched from the released state to the locked state.

9. The catheter positioning device according to claim 1 or 2, characterized in that: The self-locking module further comprises a substrate, and the self-locking unit is formed by bending and extending from the body of the substrate, wherein: The V-shaped groove further comprises a top end, a first groove body side wall and a second groove body side wall extending from the top end, wherein the top end is further provided with a gap, and the first groove body side wall is perpendicular to the axis of the conduit disposed in the positioning guide groove; The substrate is arranged on the base and is located outside the V-shaped groove. The self-locking unit bent and extended from the substrate can pass through the gap and extend from the outside of the V-shaped groove to the inside of the V-shaped groove, and reciprocate in the active range defined by the first groove body side wall and the second groove body side wall. The contact portion arranged on the first end of the self-locking unit slightly protrudes from the V-shaped groove and contacts the outer tube wall of the catheter arranged in the positioning guide groove; wherein, When the conduit is positioned at the preset position in the positioning guide groove, the self-locking unit approaches the second slot body side wall or abuts against the second slot body side wall to be in the released state, and the substrate is not deformed; when the conduit moves relative to the positioning guide groove to deviate from the preset position and is in a deviated position, the self-locking unit rotates from the second slot body side wall to the first slot body side wall to approach the first slot body side wall or abut against the first slot body side wall, so that the self-locking unit switches from the released state to the locked state, and the substrate is deformed; and wherein, When the conduit is restored to the preset position from the deviated position, the deformed substrate provides a self-resetting force to the self-locking unit, so that the self-locking unit rotates from the first slot side wall to the second slot side wall to approach the second slot side wall or abut against the second slot side wall, so that the self-locking module automatically returns to the released state.

10. The catheter positioning device according to claim 1 or 2, characterized in that: The shape of the contact portion is adapted to the shape of the outer tube wall of the catheter.

11. The catheter positioning device according to claim 10, characterized in that: The conduit is a circular structure, the contact portion is an arc-shaped structure, and the contact portion also has a first end located at the bottom of the positioning guide groove and a second end located at the notch of the positioning guide groove, wherein the length of the second end is slightly shorter than the length of the first end so that the conduit can be installed in the positioning guide groove.

12. The catheter positioning device according to claim 11, characterized in that: When the self-locking unit is in the locked state, the arc surface portion of the arc structure of the contact portion generates a force on the outer tube wall of the catheter along a third direction, and at the same time, the first end and the second end of the contact portion respectively generate a force on the outer tube wall of the catheter along a fourth direction perpendicular to the third direction.

13. The catheter positioning device according to claim 1, characterized in that: The self-locking modules are arranged on opposite sides of the positioning guide groove in pairs or in a staggered manner.

14. The catheter positioning device according to claim 1 or 2, characterized in that: The positioning guide groove also has a limiting portion for limiting the positioning of the catheter in the positioning guide groove.

15. The catheter positioning device according to claim 14, characterized in that: The limiting portion is a wave-shaped groove edge arranged at the groove opening of the positioning guide groove.

16. The catheter positioning device according to claim 1 or 2, characterized in that: A plurality of auxiliary positioning units are also provided in the positioning guide groove, for assisting the positioning of the catheter at the preset position in the positioning guide groove.

17. The catheter positioning device according to claim 1 or 2, characterized in that: The self-locking unit is made of polymer material, metal material, or a combination of polymer material and metal material.

18. The catheter positioning device according to claim 2, characterized in that: The catheter positioning device also has a position adjustment component for adjusting the position of the self-locking module or the stop module on the base.

19. The catheter positioning device according to claim 1 or 2, characterized in that: The base is a thin base.

20. The catheter positioning device according to claim 1 or 2, characterized in that: The base is a thick base having an upper surface and a side surface. The self-locking module and / or the positioning guide groove can be arranged on the upper surface and / or the side surface of the base.

21. The catheter positioning device according to claim 1 or 2, characterized in that: The body is human skin, the base is fixed to the body by adhesion, and the catheter positioning device also includes an adhesion unit, the base is fixed to the upper surface of the adhesion unit, and the lower surface of the adhesion unit has an adhesive for adhering to the body.

22. The catheter positioning device according to claim 1 or 2, characterized in that: The catheter positioning device has a plurality of the self-locking modules, wherein: When the conduit moves relative to the positioning guide groove in a first direction and deviates from the preset position, a portion of the self-locking module automatically switches from the release state to the locking state to restrict the conduit from moving relative to the positioning guide groove along the first direction; and When the catheter moves relative to the positioning guide groove in a second direction opposite to the first direction and deviates from the preset position, another part of the self-locking module automatically switches from the released state to the locked state to limit the movement of the catheter relative to the positioning guide groove along the second direction.

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