TWI725903B - Fluid pressure gun device for balloon catheter - Google Patents

Abstract

The present invention provides a fluid pressure gun device for balloon catheter, which includes a tubular cavity, a fluid tube, a pressure monitoring device, a plunger, a screw structure, a cover and a detent structure, wherein inside the body of the cavity forms a chamber, the plunger is disposed in the chamber, and inside the casing forms a chamber. The screwing structure includes two screwing blocks, and each screwing block is oppositely arranged in the chamber according to the plunger as the center. Each of the screw blocks is screwed with the plunger, and a plurality of springs respectively lean against the screw block and the cover, and the detent structure is used to depart the screw blocks from the plunger.

The plunger is supported by each screw block at least on two opposite sides, and making it highly reliable of the combination of the plunger and each screw block.

Description

Balloon catheter fluid pressure gun device

The present invention relates to a pressurizing device for a balloon catheter; in particular, it refers to an innovative structural type revealer of a fluid pressure gun device for a balloon catheter.

The balloon catheter is a flexible catheter with an inflatable balloon at the top. In angioplasty operations, the balloon catheter is often used to expand the narrowed area or create a passage inside the blood vessel. When using, put the uninflated balloon into For positioning, the balloon is inflated according to different surgical purposes, the balloon is expanded to expand the blood vessel, and the balloon catheter can be removed after the balloon is degassed.

A conventional fluid injection device is used to inflate and deflate the balloon during angioplasty operations inside a blood vessel. It mainly includes a tubular body, the front end of which is connected with a fluid tube, and the inside of the body forms a cavity. The chamber communicates with the fluid tube, and the fluid tube communicates with the balloon catheter through a connecting fitting. The front end of the main body is provided with a pressure monitoring device for monitoring and indicating the pressure inside the chamber. The plug is movably arranged in the chamber, the front end of the plunger is provided with a piston, the rear end of the plunger extends outside the main body and is provided with an operating part, and operating the operating part allows the plunger to depress the piston The inside of the chamber is reciprocated to inject fluid or extract fluid to the airbag. The plunger forms a male thread on the outer periphery. The main body is provided with a screw structure on one side of the plunger, and the screw structure has a female screw. The thread is matched with the male thread, and the threaded structure is pushed or pulled sideways, so that the threaded structure can be selectively combined with or disengaged from the plunger.

In the early stage of injecting fluid into the airbag to inflate the airbag, the screwed structure is separated from the plunger, and the plunger and the piston can be moved forward quickly; when the screwed structure is combined with the plunger laterally , Rotating the plunger can make the plunger and the piston push the fluid into the airbag under the condition that the injection volume can be more accurately controlled; when the fluid is to leave the airbag to shrink the airbag, the screw is engaged The structure is laterally separated from the plunger, and the pressure of the airbag and the fluid pushes the piston, so that the piston and the plunger can quickly move backwards, according to which the airbag quickly shrinks.

According to the investigation, the conventional fluid injection device still has the following problems and shortcomings in practical application experience: the screw structure is combined with the plunger, so that the plunger can resist the pressure from the fluid, but the screw The structure is combined with the plunger only on one side of the plunger, and the plunger is in a state of biased force. The said pressure may cause the plunger to produce a small degree of lateral deformation in the direction away from the screw structure, Affecting the reliability of the effective screwing of the female thread and the male thread, there is a risk of structural damage to the female thread and the male thread, and the risk of the plunger being separated from the screw structure.

Therefore, in view of the above-mentioned problems of the conventional fluid injection device technology, how to develop an innovative structure that can be more ideal and practical is really awaiting the relevant industry to think about the goal and direction of the breakthrough; in view of this, the invention With many years of experience in manufacturing, development and design of related products, human-centered people, after detailed design and careful evaluation for the above goals, finally came up with a practical invention.

The main purpose of the present invention is to provide a fluid pressure gun device for a balloon catheter. The technical problem to be solved is how to develop a plunger and screw structure with high screwing reliability, and the plunger is subject to high reliability. The new fluid pressure gun device with balanced force and more ideal practicability is aimed at thinking about innovative breakthroughs.

Based on the foregoing objectives, the technical features of the present invention to solve the problem are mainly that the fluid pressure gun device of the balloon catheter includes a tubular cavity, a fluid tube, a pressure monitoring device, a plunger, a screw structure, and a The housing and a detent structure, wherein a cavity is formed inside the cavity for accommodating fluid, the front end of the cavity is connected to the fluid tube, the cavity is connected to the fluid tube, and the fluid tube is provided with a connecting fitting According to the fluid tube communicating with a balloon catheter, the pressure monitoring device is arranged in the cavity for monitoring and indicating the pressure of the fluid, the plunger is movably arranged in the chamber, and the front end shaft of the plunger Pivot a piston, the piston is in close contact with the cavity, according to which the plunger moves the piston to reciprocate in the chamber, thereby injecting or extracting the fluid to the balloon of the balloon catheter, the plunger is An operating part is formed at the rear end, thereby providing convenience for operating the plunger to move or rotate in the axial direction. The screw structure is selectively coupled with or disengaged from the plunger, so that the plunger resists the fluid Pressure, and control the displacement of the plunger and the piston;

The cover is arranged at the rear end of the cavity, the inside of the cover forms a chamber, the plunger protrudes outside the rear end of the cover through the chamber, and the plunger is provided with a first thread structure , The first thread structure is formed at least on the opposite side of the plunger;

The screw structure is arranged in the chamber, the screw structure includes two screw blocks, each screw block is arranged oppositely according to the plunger as the center, and each screw block cooperates with the first screw structure to form a second Thread structure, according to which each screw block is screwed with the plunger, the screw structure is further provided with a plurality of springs between each screw block and the casing, and each spring respectively resists the screw block And the cover, according to this, provide thrust to improve the reliability of the screwing of each screw block and the plunger;

The detent structure includes two cams, two arm rods, and an adapter rod. The cams are elliptical discs. Each cam is pivotally embedded between each screw block, and each cam is connected to each screw. The two ends of the joint block away from the plunger are adjacent to each other, defining an imaginary line passing through the center of each cam, the imaginary line passing through the plunger radially, and each arm rod is connected with each cam, and the two connecting rods The ends are respectively connected with the arm rods, and the cams are driven by the arm rods to synchronously reciprocate and rotate, so that the second screw structure and the first screw structure are screwed or disengaged.

The main effect and advantage of the present invention is that the plunger is supported by the screwing blocks on at least two opposite sides, respectively, and the reliability of the effective screwing of the first screw structure and the second screw structure is high.

Another object of the present invention is to achieve the advantages of easy operation of combining or separating each screw block and the plunger by the detent structure, and practical progress.

Please refer to Figures 1 to 11, which are preferred embodiments of the fluid pressure gun device of the balloon catheter of the present invention. However, these embodiments are for illustrative purposes only and are not limited by this structure in the patent application.

The fluid pressure gun device of the balloon catheter includes a tubular cavity 10, a fluid tube 20, a pressure monitoring device 30, a plunger 40, a screw structure 50, a cover 60 and a detent structure 70. A chamber 12 is formed inside the cavity 10 for accommodating fluid (not shown in the figure). The fluid can be gas or liquid. The front end of the cavity 10 is connected to the fluid tube 20. 12 is connected to the fluid tube 20, and the fluid tube 20 is provided with a connecting fitting 22, so that the fluid tube 20 is connected to a balloon catheter (not shown), the pressure monitoring device 30 is provided in the cavity 10 for monitoring And indicate the pressure of the fluid, the plunger 40 is movably arranged in the chamber 12, and the front end of the plunger 40 pivots a piston 42 which is tightly attached to the chamber 10, so that the plunger 40 The piston 42 is moved to reciprocate in the cavity 12 to inject or extract the fluid to the balloon of the balloon catheter, and to prevent the fluid from leaking between the piston 42 and the cavity 10, the plunger An operating portion 44 is formed at the rear end of the plunger 40, thereby providing convenience for operating the plunger 40 to rotate or move in the axial direction. The screw structure 50 is selectively coupled with or disengaged from the plunger 40, so that the plunger 40 40 resists the pressure from the fluid and controls the displacement of the plunger 40 and the piston 42; the plunger 40 is provided with a first thread structure 46. In this example, the first thread structure 46 is in a zigzag shape The first thread structure 46 surrounds the lateral periphery of the plunger 40. In other embodiments, the first thread structure 46 can be transformed to be formed on the opposite side of the plunger 40.

The cover 60 is disposed at the rear end of the cavity 10, and a chamber 62 is formed inside the cover 60. The plunger 40 protrudes outside the rear end of the cover 60 through the chamber 62, and the screw is engaged The structure 50 is arranged in the chamber 62. The screw structure 50 includes two screw blocks 52. Each screw block 52 is arranged opposite to each other according to the plunger 40, and each screw block 52 is respectively matched with the first screw. The structure 46 forms a second thread structure 54. According to each of the screw blocks 52 and the plunger 40, the screw structure 50 is further provided with a plurality of springs between each of the screw blocks 52 and the casing 60 56. Each of the springs 56 respectively abuts the screw block 52 and the cover 60, and each of the springs 56 respectively provides a thrust to the screw block 52 to improve the reliability of the screwing of each screw block 52 and the plunger 40 Degree; In this example, the second thread structure 54 is formed in the central part of the screw block 52 facing the plunger 40 direction, each of the springs 56 are respectively formed on the screw block 52 near the two ends of the part The button makes the screw block 52 form a balanced state of force, which can further improve the reliability of screwing each screw block 52 with the plunger 40.

With the above-mentioned structural composition and technical characteristics, when the screw block 52 is screwed with the plunger 40, the plunger 40 can resist the pressure from the fluid, because the first screw structure 46 is formed at least on the On the opposite side of the plunger 40, the plunger 40 is supported by each of the screw blocks 52 at least on two opposite sides, the plunger 40 is in a state of balanced force, and the pressure will not cause the plunger 40 side The first screw structure 46 and the second screw structure 54 are effectively screwed with high reliability, and the pressure will not cause the first screw structure 46 and the second screw structure 54 to be structured. damage.

The detent structure 70 includes two cams 71, two arm rods 72, and an engagement rod 73. The cams 71 are elliptical discs. The cams 71 are pivotally embedded between the screw blocks 52, and each The cam 71 is respectively adjacent to the two ends of each screw block 52 away from the plunger 40, defining a virtual line L passing through the center of each cam 71, the virtual line L radially passing through the plunger 40, and each arm The rod 72 is respectively connected to one side of each cam 71, and the two ends of the connecting rod 73 are respectively connected to each of the arm rods 72. By pulling the connecting rod 73, each of the cams can be moved by the arm rods 72. 71 rotates synchronously. As shown in Figures 5 to 7, when the two ends of the short diameter D1 of the cam 71 point to each of the screw blocks 52, the spring 56 provides thrust to urge each screw block 52 to lean against the plunger. 40. Each second thread structure 54 is screwed with the first thread structure 46, as shown in FIGS. 9 to 11, when both ends of the major diameter D2 of the cam 71 point to each of the screw blocks 52, the The cam 71 pushes each screw block 52 away from the plunger 40, each of the second screw structure 54 is separated from the first screw structure 46, and the operation of combining or separating each screw block 52 and the plunger 40 is easy .

Each of the screw blocks 52 can be relatively movably embedded in the chamber 62, and each of the screw blocks 52 is positioned by the chamber 62, and the path of each of the screw blocks 52 relative to the plunger 40 is restricted. , To improve the reliability of the combination or separation of each screw block 52 and the plunger 40, which is a preferred implementation choice.

The cover 60 is formed with two through slots 64, each arm 72 passes through each of the through slots 64, so that each arm 72 extends into the cover 60, and each arm 72 is provided with a pivot 74, Each of the pivots 74 is coaxial with each of the cams 71, and each of the pivots 74 is pivoted on the cover 60. When the connecting rod 73 is pulled, each of the arm levers 72 is centered on each of the pivots 74. The cams 71 are driven to rotate synchronously.

The connecting rod 73 is adjacent to the rear edge of the casing 60, and the connecting rod 73 forms a grip portion 75 in the middle section. The operator can hold the grip portion 75 and pull the connecting rod 73 to increase the pull. The operation convenience of turning the arm lever 72; the connecting rod 73 cooperates with the plunger 40 to form a notch 76, and the plunger 40 passes through the notch 76. Accordingly, when the screw structure 50 is combined with the plunger 40 , The connecting rod 73 can further approach the plunger 40.

Each screw block 52 is respectively formed with a plurality of concave holes 58, the cover 60 is provided with a plurality of protruding posts 66, each of the springs 56 is pivotally inserted into each of the concave holes 58, and each of the springs 56 is respectively sleeved. The protruding column 66 positions each of the springs 56 accordingly. With the formation of the recessed hole 58, the length of the spring 56 is increased, thereby increasing the elastic force that the spring 56 can provide to the screw block 52, thereby increasing The reliability of the effective screwing of the first thread structure 46 and the second thread structure 54.

The cavity 10 protrudes laterally with two ears 14, two embedding grooves 68 are formed inside the casing 60, and the ears 14 are respectively embedded in the embedding grooves 68, so that the cavity 10 and the cover are relatively positioned accordingly When the operator controls the housing 60 and operates the plunger 40 to linearly move or rotate, the cavity 10 and the housing 60 form a relative positioning, and the cavity 10 will not be caused by the action of the piston 42 Actuate linearly or rotationally to improve the reliability of operation.

10: Cavity

12: Chamber

14: Ears

20: fluid pipe

22: Connect accessories

30: Pressure monitoring device

40: plunger

42: Piston

44: Operation Department

46: The first thread structure

50: Screw structure

52: Screw block

54: The second thread structure

56: Spring

58: concave hole

60: cover

62: Room

64: piercing

66: convex column

68: Insert groove

70: Control structure

71: Cam

72: boom

73: connecting rod

74: Pivot

75: grip

76: Notch

D1: Short path

D2: Long diameter

L: virtual line

Figure 1 is a perspective view (1) of a preferred embodiment of the present invention. FIG. 2 is a top view of the state shown in FIG. 1 of the preferred embodiment of the present invention. Figure 3 is an exploded perspective view of a preferred embodiment of the present invention. Fig. 4 is a schematic cross-sectional view of 4-4 in Fig. 2. Fig. 5 is a cross-sectional view of Fig. 2 taken along line 5-5, showing the coupling state of the screw structure and the plunger. Fig. 6 is a 6-6 sectional view of Fig. 2, showing the state that the cam is pivotally embedded between the two screw blocks. Figure 7 is a partial enlarged view of the cam and screw block of Figure 6; Fig. 8 is a perspective view (2) of a preferred embodiment of the present invention. Figure 9 is a partial cross-sectional view of the detent structure and the screw structure of the preferred embodiment of the present invention, showing the state of the cam detent and screw structure separated from the plunger. Fig. 10 is a partial enlarged view of the cam and screw block of Fig. 9; 11 is a partial cross-sectional view of the plunger and the screw structure of the preferred embodiment of the present invention, showing the state of the screw structure and the plunger separated.

10: Cavity

20: fluid pipe

22: Connect accessories

30: Pressure monitoring device

44: Operation Department

60: cover

64: piercing

70: Control structure

75: grip

Claims (8)

A fluid pressure gun device for a balloon catheter includes a tubular cavity, a fluid tube, a pressure monitoring device, a plunger, a screw structure, a cover and a detent structure, wherein the inside of the cavity A cavity is formed for accommodating fluid. The front end of the cavity is connected to the fluid tube, the cavity is connected to the fluid tube, and the fluid tube is provided with a connecting fitting, so that the fluid tube is connected to a balloon catheter. The monitoring device is arranged in the cavity for monitoring and indicating the pressure of the fluid. The plunger is movably arranged in the cavity. The front end of the plunger pivots a piston, and the piston is in close contact with the cavity. The plunger is caused to actuate the plunger to reciprocate in the chamber, thereby injecting or extracting the fluid to the balloon of the balloon catheter. The plunger forms an operating part at the rear end, thereby providing operation of the plunger Convenience of displacement or rotation in the axial direction, the threaded structure is selectively combined with or disengaged from the plunger, so that the plunger resists the pressure from the fluid and controls the displacement of the plunger and the piston; The cover is arranged at the rear end of the cavity, the inside of the cover forms a chamber, the plunger protrudes outside the rear end of the cover through the chamber, and the plunger is provided with a first thread structure , The first thread structure is formed at least on the opposite side of the plunger; The screw structure is arranged in the chamber, the screw structure includes two screw blocks, each screw block is arranged oppositely according to the plunger as the center, and each screw block cooperates with the first screw structure to form a second Thread structure, according to which each screw block is screwed with the plunger, the screw structure is further provided with a plurality of springs between each screw block and the casing, and each spring respectively resists the screw block And the cover, according to this, provide thrust to improve the reliability of the screwing of each screw block and the plunger; The detent structure includes two cams, two arm rods, and an adapter rod. The cams are elliptical discs. Each cam is pivotally embedded between each screw block, and each cam is connected to each screw. The two ends of the joint block away from the plunger are adjacent to each other, defining an imaginary line passing through the center of each cam, the imaginary line passing through the plunger radially, and each arm rod is connected with each cam, and the two connecting rods The ends are respectively connected with the arm rods, and the cams are driven by the arm rods to synchronously reciprocate and rotate, so that the second screw structure and the first screw structure are screwed or disengaged. The fluid pressure gun device for a balloon catheter according to claim 1, wherein each screw block can be relatively movably embedded in the chamber. The fluid pressure gun device for a balloon catheter according to claim 1, wherein the casing forms two through grooves, each of the arm rods passes through each of the through grooves, each arm rod is provided with a pivot, and each pivot The cams are coaxially formed with the cams, and the pivots are pivoted on the casing. The fluid pressure gun device for a balloon catheter according to claim 1, wherein the adaptor rod is adjacent to the rear edge of the casing, and the adaptor rod forms a grip portion in the middle section, thereby increasing the turning of the arm The ease of operation of the lever. The fluid pressure gun device for a balloon catheter according to claim 1, wherein the adaptor rod cooperates with the plunger to form a notch, and the plunger passes through the notch. The fluid pressure gun device for a balloon catheter according to claim 1, wherein each of the screw blocks respectively forms a plurality of concave holes, the housing is protruded with a plurality of convex posts, and each of the springs is pivotally embedded in each of the concave holes. , And each of the springs is respectively sleeved and each of the protruding posts, and each of the springs is positioned accordingly. The fluid pressure gun device for a balloon catheter according to any one of claims 1 to 6, wherein the first thread structure surrounds the lateral periphery of the plunger. The fluid pressure gun device for a balloon catheter according to any one of claims 1 to 6, wherein the cavity protrudes laterally with two ears, the inside of the casing forms two embedding grooves, and each ear is respectively embedded It is arranged in each of the embedding grooves, and the cavity and the cover are relatively positioned accordingly.

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