WO2015157888A1 - Balloon-type positive pressure cut-off switch for medical catheter - Google Patents

Abstract

A medical catheter flow-stopping clip, especially a balloon-type positive pressure cut-off switch for a medical catheter, comprises a body and a catheter through hole arranged on the body and used for allowing the medical catheter to pass through. A key point thereof is that the medical catheter flow-stopping clip also comprises a movable lock rod. The body is a lock rod lock sleeve. A lock convex block and a falling-prevention convex block that can elastically stretch horizontally are arranged at an interval in a longitudinal direction of the movable lock rod. Both the lock convex block and the falling-prevention convex block are a check pawl. The moveable lock rod is inserted into a cavity of the lock rod lock sleeve. A longitudinal section of the moveable lock rod is sleeved in the lock rod lock sleeve. The bottom of the moveable lock rod is inserted into the catheter through hole, and clamps the medical catheter to a clamping surface at a bottom side of the catheter through hole when the lock convex block is in contact with the lock rod lock sleeve. An outer peripheral surface of the medical catheter is coated with an elastic balloon. The present invention has the characteristics: operations are simple, negative pressure will not occur and the medical catheter does not need to be pulled during an operation process, and an operation accident caused by pulling of the medical catheter will not occur.

Description

 Balloon positive pressure cut-off switch for medical catheter  Instruction content

 Technical field

 The present invention relates to a medical catheter stop clip, and more particularly to a balloon positive pressure cutoff switch for a medical catheter.

 Background technique

The applicant has previously applied for a patent for the invention of a medical catheter stop clip that can be operated with one hand. The application has the advantages of simple and convenient operation, no negative pressure during the operation process, no need to pull the medical catheter, and no operation accidents caused by pulling the medical catheter. This application is based on an improvement of this prior application. The previous application has the following deficiencies in the use process: That is, after the active lock lever of the stop clip is turned off for a long period of time, for example, after about one day, it is reopened again, and the pressure-deformed medical catheter cannot be restored to the original state for a short time, although it does not affect the infusion, but it will affect the flow stop again. At the time of the break, the positive pressure liquid flow generated is insufficient.

 Summary of the invention

The object of the present invention is to overcome the deficiencies in the prior art, and to provide an operation that is simple and convenient in operation, does not generate negative pressure during operation, and does not require drawing of a medical catheter, and does not cause an operation due to drawing of the medical catheter. At the same time as the accident, The flow of positive pressure fluid generated by the stop-and-shut shutdown can still ensure a sufficient positive pressure cut-off switch for medical catheters.

 The object of the present invention is achieved by the following route.

 Balloon positive pressure cut-off switch for medical catheter Included in the body and a through-hole for the passage through the medical catheter, the medical catheter has a clamped state and a relaxed state in the through-hole, the main point of which is that the utility model further comprises an active lock lever, and the body is A locking rod locking sleeve is provided with a locking elastic card and a retaining convex card which are laterally elastically extendable in the longitudinal direction of the movable locking rod. The locking convex card and the retaining convex card are both a reverse pawl and a movable locking rod inserted. Positioned in the locking rod locking sleeve cavity and one of the longitudinal passage movable locking rods is sleeved with the locking rod locking sleeve, the bottom portion of the locking rod is inserted into the through hole, and the medical catheter is inserted when the locking convex card is engaged with the locking rod locking sleeve Clamping on the clamping surface on the bottom side of the tube hole, the medical catheter corresponding to the clamping surface is composed of an elastic balloon or coated with an elastic balloon on the outer peripheral surface of the medical catheter. The locking convex card and the locking rod locking sleeve are separated from the card and enter the above-mentioned socket section. When the movable locking lever is relaxed to the limit state, the locking convex card is in contact with the locking rod locking sleeve.

In this way, the retaining clip ensures that the movable lock lever is always inserted in the lock lever locking sleeve, and the medical catheter passing through the through hole is always at the clamping surface of the bottom surface of the movable lock rod and the bottom side of the through hole. between. The top surface of the movable lock lever and the lower bottom surface of the lock lever lock sleeve are respectively clamped and compressed by the thumb of the single hand and any other fingers, and the lock lock card is released when the movable lock lever is pressed against the lock lever sleeve to the card contact position. The sleeved section is laterally elastically stretched to engage with the corresponding card position of the lock lever locking sleeve, the medical catheter is clamped, and since the locking convex card is the anti-reverse pawl, the movable locking lever is locked in the reverse direction. After releasing the locking card, the movable locking rod is opened relative to the locking rod locking sleeve, and the medical catheter is no longer clamped in the through-hole, and is in a diastolic state, and the anti-distraction card ensures that the movable locking rod does not disengage from the lock. The plug of the rod locking sleeve. The elasticity of the elastic balloon ensures that the elastic balloon can be quickly restored to its original state without being affected by the clamping and closing time during the diastolic state, thus ensuring When the flow stop is turned off again, the positive pressure liquid flow generated is sufficient.

 The object of the present invention can also be achieved by the following means.

This elastic balloon is not necessarily a spherical shape, but is a common name for medically elastic bladders. In this application, further optimization regarding the elastic balloon can be:

 The elastic balloon is either an ellipsoidal shape or a cylindrical shape.

 The bottom structure of the movable lock lever can be further optimized to:

The bottom of the movable lock bar is either a slightly blunt tooth shape, or a high or low stepped tooth shape, or a stepped tooth shape of different heights, and the tooth top line intersects or is perpendicular to the axis of the pipe hole. But further optimization is:

The bottom of the movable lock bar has a stepped surface in which the concave step is long and corresponds to the elastic balloon, and the convex step is short and corresponds to the medical catheter at the elastic balloon side.

Thus, in response to the stepped surface formed by the elastic balloon and the medical catheter adjacent to its sides. When the clamp is turned off, the convex step contacts and clamps the medical catheter, while the concave step contacts and clamps the elastic balloon.

 The convex step is located in front of the concave step relative to the infusion direction.

 Further optimization is:

 The bottom of the movable lock bar has a stepped surface in which the concave step is long and corresponds to the elastic balloon, and the convex step is short and corresponds to the medical catheter at the edge of the elastic balloon. The clamping surface on the bottom side of the pipe hole also has a step surface, and the step surface corresponds to the step surface of the bottom of the movable lock bar.

 In this way, the clamping is more secure.

 Further optimization is:

 The bottom step of the movable lock lever and The stepped surface of the bottom side of the tube hole has a convex height of the convex step relative to the concave step smaller than a step difference between the elastic balloon and the medical catheter adjacent to the side.

 In this way, the bottom step surface of the movable lock bar that is pressed down is ensured, firstly, the concave step is first contacted with the elastic balloon.

The movable lock bar is composed of an elastic piece and a main body, and the two elastic pieces are symmetrically distributed on both sides of the main body and elastically connected with the main body, and the two elastic pieces have lateral expansion and contraction, and the locking convex card and the retaining convex card are sequentially spaced along the longitudinal direction of the elastic piece. Distribution, a total of two locking convex cards and two retaining convex cards are symmetrically distributed on the two elastic pieces, respectively, in the clamped state, the two elastic pieces with the locking convex card and the retaining convex card are inserted in the lock bar locking sleeve In the cavity.

 Thus, by simultaneously kneading the two elastic pieces, the locking convex card can be released.

 There are many options for the construction of the elastic piece. A compression spring can be placed between the elastic piece and the main body to achieve elasticity, but the optimized structure should be:

The bottoms of the two elastic pieces are connected with the main body, and the upper part of the bottom part is freely extended upward to form an open jaw shape, and the two clamping jaws respectively have a slot between the main body and the main body, and the main body extends upward and protrudes to form the upper part of the upper jaw. The upper top portion is also exposed outside the lock lever locking sleeve, and both the locking convex card and the retaining convex cam are a pawl fixed on the clamping jaw.

 The outer sides of the two jaws are inclined or curved, and the two sides of the locking sleeve locking sleeve are provided with two clamping jaws to form two elastic buckles, The bottoms of the two elastic release tabs are connected to the main body, and the upper part of the bottom portion is freely extended upward to form an open jaw shape, and the two jaws respectively have a slot between the lock lever sleeve body and the dew point on the pinch ear respectively. Compressed on the slope or curved surface of the two elastic piece jaws.

In this way, the two tabs are compressed, and the two elastic sheet jaws contract slightly downward while laterally contracting due to the action of the bevel or the curved surface, so that the locking of the locking cam is more labor-saving.

The sleeve portion of the movable lock lever and the lock lever lock sleeve inserted in the lock lever locking sleeve is either located at the upper portion of the movable lock lever or at the upper and lower portions of the movable lock lever.

 Further, the lock bar locking sleeve can be optimized in the following manner:

The lock lever locking sleeve includes a main body having a cavity open at one end, and the movable lock rod is inserted into the cavity from the opening, and the cavity is provided with a sleeved section which is sleeved with a corresponding portion of the movable lock lever and The embossing card may be in the free section from above, the lower end of the cavity intersecting the through-hole and the bottom end of the cavity being the clamping face of the medical catheter.

Thus, in the diastolic state, the locking convex card on the movable lock lever is sleeved in the socket section; in the clamped state, the locking convex card is also located in the socket section, or enters the free passage through the socket section. In this case, the locking cam can use the step of the socket section and the free section joint as the position to be engaged with the lock lever locking sleeve.

 The side wall of the cavity corresponding to the retaining clip in the free passage is preferably transparent and open.

Preferably, the other end of the free passage further has a sleeve section, and the bottom end of the movable lock rod sequentially passes through the upper sleeve section, the free section, and then enters the sleeve section to be inserted into the sleeve hole.

 In this way, the main body cavity has a socket section at both ends, and the sleeve of the movable lock rod and the lock rod locking sleeve inserted in the cavity has better stability.

 The clamping surface of the bottom of the locking rod locking sleeve cavity is either a flat surface or a tooth shape corresponding to the tooth shape of the bottom of the movable locking rod and intermeshing.

The axis of the through hole of the locking rod locking sleeve may be parallel to the wide surface of the locking sleeve, in the middle of the narrow surface; or may be perpendicular to the wide surface of the locking sleeve, in the middle of the wide surface.

 In summary, the present invention has the following advantages over the prior art: The operation is simple and convenient, no negative pressure is generated during the operation, and the medical catheter is not required to be pulled, and an operation accident caused by pulling the medical catheter is not generated.

 DRAWINGS

 1 is a schematic view showing the structure of an infusion set provided with a flow stop clip in the prior art.

 2 is a schematic perspective view showing the structure of a balloon positive pressure cutoff switch for a medical catheter according to Embodiment 1 of the present invention;

 3 is a schematic perspective view showing the structure of a movable lock lever in a balloon positive pressure cutoff switch for a medical catheter according to Embodiment 1 of the present invention;

 4 is a schematic perspective view showing the structure of a lock lever locking sleeve in a balloon positive pressure cutoff switch for a medical catheter according to the first embodiment of the present invention;

 Figure 5 is a schematic cross-sectional perspective view showing the structure of a lock lever locking sleeve in a balloon positive pressure cutoff switch for a medical catheter according to the first embodiment of the present invention;

 Figure 6 is a schematic view showing the balloon positive pressure cutoff switch for medical catheters in a clamped state according to the first embodiment of the present invention;

 Figure 7 is a schematic view showing the balloon positive pressure cutoff switch for medical catheters in a diastolic state according to the first embodiment of the present invention;

 Figure 8 is a perspective view of a balloon positive pressure cut-off switch for a medical catheter according to the first embodiment of the present invention. A schematic cross-sectional view of the medical catheter of the paragraph corresponding to the clamping surface;

 Figure 9 is a perspective view of a balloon positive pressure cut-off switch for a medical catheter according to a preferred embodiment of the present invention. A schematic cross-sectional view of the medical catheter of the paragraph corresponding to the clamping surface.

 Label description:

 1 movable lock lever; 1.1 main body; 1.1.1 step surface; 1.2 elastic piece; 1.2.1 locking plane; 1.2.2 locking the convex card; 1.2.3 the outer side of the jaw; 1.2.4 retaining the convex card; 1.3 on the top 2 lock bar locking sleeve; 2.1 main body; 2.1.1 socket section; 2.1.2 cavity; 2.1.3 free passage; 2.2 elastic tripping pinch; 2.2.1 dew point; 2.2.2 pipe hole; 2.2. 3 clamping surface; 3 medical catheter; 3.1 positive pressure balloon; 3.2 elastic recovery member; 3.3 elastic balloon.

 detailed description

 Embodiment 1:

 Referring to Figures 2, 6, 7, and 8, a balloon positive pressure cut-off switch for medical catheters The utility model comprises an active locking rod 1 and a locking rod locking sleeve 2. The bottom of the locking rod locking sleeve 2 has a through hole 2.2.2 for passing through the medical catheter, and the medical catheter 3 is in the through hole 2.2.2. It has a clamped state and a relaxed state. The movable lock bar 1 is longitudinally spaced apart from the horizontally elastically stretchable locking convex card 1.2.2 and the retaining convex card 1.2.4, the locking convex card 1.2.2 and the retaining convex card 1.2.4 are both a kind of anti-reverse spine The claw, the movable lock lever 1 is inserted in the lock lever locking sleeve 2 and one of the longitudinal passage movable lock lever 1 is sleeved with the lock lever locking sleeve 2, the bottom portion of which extends into the through hole 2.2.2, and the locking convex card 1.2.2 When the lock lever 2 is in contact with the lock lever, the medical catheter 3 is clamped on the clamping surface 2.2.3 on the bottom side of the through hole 2.2.2, and the locking convex card 1.2.2 is separated from the lock lever locking sleeve 2. After the card is touched, it enters the above-mentioned socket section 2.1.1. When the movable lock lever 1 is relaxed to the limit state, the retaining convex card 1.2.4 is in contact with the lock lever locking sleeve 2.

Referring to Fig. 3, the movable lock bar 1 is composed of an elastic piece 1.2 and a main body 1.1, and the two elastic pieces 1.2 are symmetrically distributed on both sides of the main body 1.1 and elastically coupled to the main body 1.1. The bottom of the two elastic pieces 1.2 is connected with the main body 1.1, and the upper part of the bottom portion is freely extended upward to form an open jaw shape, and the two clamping jaws respectively have a slot between the main body 1.1, and the main body 1.1 extends upward and protrudes from the two jaws. The upper top 1.3, the upper top 1.3 is also exposed outside the lock lever locking sleeve 2. The locking convex card 1.2.2 and the retaining convex card 1.2.4 are both pawls fixed on the clamping jaws. Thus, the two elastic pieces 1.2 have a lateral telescopic spring, and the locking convex card 1.2.2 and the retaining convex card 1.2.4 are sequentially spaced apart along the longitudinal direction of the elastic piece, and there are two locking convex cards 1.2.2 and two non-stopping portions. The convex cards 1.2.4 are symmetrically distributed on the two elastic sheets 1.2, respectively. The outer side of the two jaws 1.2.3 has an oblique curved surface. The bottom of the movable lock bar 1 has a step surface 1.1.1, wherein the concave step is long and corresponds to the elastic balloon 3.3, and the convex step is short and corresponds to the catheter on the side of the elastic balloon 3.3. The clamping surface on the bottom side of the pipe hole also has a step surface, and the step surface corresponds to the step surface of the bottom of the movable lock bar. The convex height of the convex step relative to the concave step is smaller than the step difference between the elastic balloon 3.3 and the medical catheter 3. This ensures the bottom step surface of the movable lock lever 1 which is pressed down, firstly the concave step is first contacted with the elastic balloon 3.3.

Referring to Fig. 8, the elastic balloon 3.3 is composed of a positive pressure balloon 3.1 and an elastic recovery member 3.2 which protrudes from a section of the medical catheter 3 by a cylindrical step to form a columnar shape. The balloon, the elastic recovery member 3.2 is coated and fixed to the outer peripheral surface of the positive pressure balloon 3.1. The positive pressure balloon 3.1 together with the elastic recovery member 3.2 constitutes a stepped drop to the medical catheter

 4 and 5, the lock lever locking sleeve includes a main body 2.1 and an elastic release tab 2.2, and two sides of the main body 2.1 are correspondingly provided with two jaws to form two Elastic tripping pinch 2.2 The bottom of the two elastic release tabs 2.2 is connected to the main body 2.1, and the upper part of the bottom portion is freely extended upward to form an open jaw shape, and each of the two clamping jaws has a slot between the body and the main body 2.1, and the pinch ears respectively have a dew point 2.2. .1 is pressed on the inclined surface of the jaws of the two elastic pieces 1.2. The main body 2.1 has a cavity 2.1.2 which is open at one end, into which the movable lock bar 1 is inserted, and the cavity 2.1.2 is provided with a corresponding portion of the movable lock bar 1 The ferrule paragraph 2.1.1 and the detachment convex card 1.2.4 can be in the free paragraph 2.1.3 from above, the lower end of the cavity 2.1.2 intersects the through hole 2.2.2 and the bottom end face 2.2.3 is The clamping surface of the medical catheter 3. The other end of the free passage 2.1.3 also has a socket section 2.1.1. The bottom end of the movable lock lever 1 passes through the previous socket section 2.1.1, and the free passage 2.1.3 enters the socket section 2.1. .1 Socket and then extend into the tube hole 2.2.2. Thus, both ends of the body cavity 2.1.2 have a socket section 2.1.1. In the free passage 2.1.3, the side wall of the cavity corresponding to the detachment convex card 1.2.4 is opened and opened. The clamping surface 2.2.3 at the bottom of the locking sleeve locking sleeve cavity is a combination of a flat surface and a groove. The locking rod locks the through hole 2.2.2 The axis is parallel to the wide side of the locking sleeve and is in the middle of the narrow side. Thus, in the diastolic state, the locking convex card 1.2.2 on the movable lock lever 1 is sleeved in the socket section 2.1.1 or the socket section 2.1.1 is ejected; in the clamped state, the convex card is locked 1.2. 2 through the socket section 2.1.1 into the free paragraph 2.1.3, at this time, the locking convex card 1.2.2 uses the step of the joint between the paragraph 2.1.1 and the free paragraph 2.1.3 as the locking rod locking sleeve 2 The location of the card touch.

 The operation of this stop clip is as follows:

 In clinical medicine, when it is necessary to cut off the medical catheter 3 When the channel is used, only one thumb and the index finger or the middle finger respectively pinch the end faces of the flow stop clamp, that is, the top of the movable lock bar 1.3 and the bottom surface of the lock bar lock sleeve 2, gently pinch, the movable lock bar 1 Moving inward along the cavity of the locking sleeve, since the elastic piece 1.2 on the locking rod has elasticity, it is restricted by the cavity wall of the locking sleeve, and the elastic piece 1.2 gradually swings closer to the inner side until the locking piece is locked on the elastic piece 1.2 1.2.2 Climb over the locking sleeve. Socket section 2.1.1, elastic sheet 1.2 Loss of restriction, return to the original shape, lock the convex card 1.2.2 Upper locking plane 1.2.1 Resisting in the socket section 2.1.1 Lower edge, in the process, the first First, the concave step at the bottom of the movable lock bar is pressed against the elastic balloon, the movable lock bar continues to press down, the balloon is squeezed, the balloon is flattened, and the liquid in the balloon is squeezed out of the balloon, since the infusion is completed after the infusion The syringe or syringe has been withdrawn from the medical infusion connector, the connector is closed, and the liquid in the extruded balloon cannot flow in the direction of the joint, and can only flow along the catheter in the direction of the human body. Thus, a positive pressure flow is generated and driven out. The blood flowing back into the human end catheter due to withdrawal of the infusion set or the syringe is prevented from being blocked by the blood coagulation due to the indwelling catheter end. The movable lock lever continues to move downward, and the conduit between the closed convex step at the bottom of the movable lock lever and the convex surface of the punching hole of the through-hole is squeezed and deformed, and the inner wall of the catheter is tightly fitted to each other, and the liquid passage in the conduit It was cut off and the purpose of shutting down the catheter was achieved. The locking and clamping structure has no over-limit and over-pressure operation during the clamping process, so that the medical catheter does not occur after the finger is released. 3 Rebounding causes negative pressure in the lumen of the tube, so that the body fluid in the patient is not inhaled and inserted into the medical catheter end of the patient, thereby avoiding blockage of the medical catheter and prolonging the indwelling time of the medical catheter.

 When it is necessary to open the medical catheter channel again, only one finger of the lock lever is used to gently press the elastic release tabs on both sides of the lock lever lock sleeve 2.2, and the dew point on the pinch ear 2.2.1 Pressing the elastic piece on the movable lock bar 1.2, elastic piece 1.2 swinging on the inner side to the elastic piece upper locking convex card 1.2.2 The outer edge spacing is smaller than the socket section 2.1.1 Inner cavity size, movable lock bar 1 Out of the constraint, the elastic piece 1.2 has a longitudinal slope on the side, under the constant pressure of the elastic release tab 2.2, plus the medical catheter 3 elastic recovery elastic force, the movable lock bar 1 The lock lever locking sleeve 2 is ejected outward along the inclined surface, and the medical catheter 3 is clamped and restrained to release the inner lumen passage. Since the lock lever elastic piece 1.2 has a retaining convex card 1.2.4, the movable lock lever 1 After the pop-up trip, the elastic piece 1.2 is restored to its original state, and the stop-locking card 1.2.4 is removed. The movable lock lever 1 does not completely disengage from the lock lever locking sleeve cavity. For easy pinching operation. Due to the elastic recovery of the elastic recovery member, the positive pressure balloon which is fixed together with the elastic recovery member is restored to the original shape, and at the same time, the closed catheter lumen passage is opened, and the infusion can be infused again through the infusion connector.

 The parts not described in this embodiment are the same as those in the prior art.

 Best embodiment:

 Referring to Figure 9, a balloon positive pressure cut-off switch for medical catheters. A columnar elastic balloon is directly made of a highly elastic material. 3.3 Then, the medical catheter 3 is fixed to both ends of the elastic balloon 3.3.

 The parts not described in this embodiment are the same as those in the first embodiment.

Claims (14)

1. A balloon positive pressure cutoff switch for a medical catheter includes a body and a through hole for a medical catheter disposed in the body, wherein the medical catheter has a clamped state and a relaxed state in the through hole, and is characterized in that The utility model comprises a movable lock bar, wherein the body is a lock bar locking sleeve, wherein the movable lock bar is longitudinally spaced apart with a horizontally elastically retractable locking convex card and a retaining convex card, and the locking convex card and the retaining convex card are both a locking pawl, the movable locking bar is inserted in the locking rod locking sleeve cavity and one of the longitudinal passage movable locking rods is sleeved with the locking rod locking sleeve, the bottom portion of the locking rod is inserted into the through hole, and the locking convex card and the locking rod are locked When the locking sleeve is in contact, the medical catheter is clamped on the clamping surface of the bottom side of the through-hole, and the medical catheter corresponding to the clamping surface is composed of an elastic balloon or on the outer circumference of the medical catheter. The utility model is coated with an elastic balloon, and the locking convex card and the locking bar locking sleeve are separated from the card and enter the above-mentioned socket section. When the movable locking bar is relaxed to the limit state, the locking convex card is in contact with the locking bar locking sleeve.
2. The balloon positive pressure cutoff switch for medical catheters according to claim 1, wherein the elastic balloon is either an ellipsoidal shape or a cylindrical shape.
3. The balloon positive pressure cut-off switch for medical catheter according to claim 1, wherein the bottom of the movable lock bar has a slightly blunt tooth shape, or a high and low uniform stepped tooth shape, or a A stepped tooth shape of different heights, the top line of the tooth intersects or is perpendicular to the axis of the through hole.
4. The balloon positive pressure cut-off switch for medical catheter according to claim 1, wherein the bottom of the movable lock bar has a step surface, wherein the concave step is long and corresponds to the elastic balloon, and the convex step is short and Corresponding to a medical catheter at the edge of the elastic balloon.
5. The balloon positive pressure cutoff switch for medical catheter according to claim 4, wherein the convex step is located in front of the concave step with respect to the infusion direction.
6. The balloon positive pressure cut-off switch for medical catheter according to claim 1, wherein the bottom of the movable lock bar has a step surface, wherein the concave step is long and corresponds to the elastic balloon, and the convex step is short and Corresponding to the medical catheter on the side of the elastic balloon, the clamping surface on the bottom side of the tube hole also has a step surface, and the step surface corresponds to the step surface of the bottom of the movable lock bar.
7. The balloon positive pressure cutoff switch for medical catheter according to claim 6, wherein the step surface of the bottom portion of the movable lock lever and the step surface of the bottom side of the through hole have a convex height of the convex step relative to the concave step is less than elasticity The step difference between the balloon and its side adjacent to the medical catheter.
8. The balloon positive pressure cut-off switch for medical catheter according to claim 1, wherein the movable lock bar is composed of an elastic piece and a main body, and the two elastic pieces are symmetrically distributed on both sides of the main body and elastically connected with the main body, the two elastic The sheet has a transverse telescopic spring, and the locking convex card and the retaining convex card are sequentially spaced apart along the longitudinal direction of the elastic piece. A total of two locking convex cards and two retaining convex cards are symmetrically distributed on the two elastic pieces, respectively, in a clamped state. The two elastic strips are inserted into the cavity of the lock bar locking sleeve together with the locking cam and the retaining clip.
9. The balloon positive pressure cut-off switch for medical catheter according to claim 8, wherein the bottoms of the two elastic pieces are connected to the main body, and the upper part of the bottom portion is freely extended upward to form an open jaw shape, and the two jaws are respectively There is a slot between the main body and the main body extending upwardly and exposing the two jaws to form a top portion, and the top portion is also exposed outside the lock lever locking sleeve, and the locking convex card and the retaining convex card are fixed on the clip. The pawl on the claw.
10. The balloon positive pressure cut-off switch for medical catheters according to claim 9, wherein the outer faces of the two jaws are inclined or curved, and the two sides of the lock bar locking sleeve are correspondingly provided with two jaws. Elastic release tabs, the bottoms of the two elastic release tabs are connected to the main body, and the upper part of the bottom portion is freely extended upward to form an open jaw shape, and the two jaws respectively have a slot between the lock sleeve body and the lock lever sleeve body. The pinch ears respectively have a dew point pressed against the inclined surface or the arc surface of the two elastic piece jaws.
11. The balloon positive pressure cutoff switch for medical catheter according to claim 1, wherein the lock lever locking sleeve comprises a main body, and the main body has a cavity open at one end, and the movable lock rod is inserted into the cavity from the opening Wherein the sleeve is provided with a socket portion that is sleeved with the corresponding portion of the movable lock lever and a free passage in which the retaining clip can be from the lower portion, the lower end of the cavity intersects the through-hole and the bottom end of the cavity is a medical catheter Clamping surface.
12. The balloon positive pressure cut-off switch for medical catheter according to claim 11, wherein the side wall of the cavity corresponding to the retaining clip in the free passage is preferably transparent and open.
13. The balloon positive pressure cut-off switch for medical catheter according to claim 11, wherein the other end of the free passage preferably further has a sleeve section, and the bottom end of the movable lock rod sequentially passes through the previous sleeve. After the paragraph and the free paragraph, enter the socket section and then extend into the tube hole.
14. The balloon positive pressure cut-off switch for medical catheter according to claim 1, wherein the axis of the through hole of the lock bar locking sleeve is parallel to the wide surface of the locking sleeve, and is in the middle of the narrow surface; The wide side is vertical and is in the middle of the wide side.