CN111632256A - Balloon pressure pump - Google Patents

Abstract

The invention provides a balloon pressure pump which comprises a shell and an operating rod, wherein the shell is provided with a far end and a near end which are arranged oppositely, an installation cavity is formed in the shell close to the far end and used for detachably installing an injector, a far end blocking piece is arranged at the far end, a communication hole communicated with the installation cavity is formed in the far end blocking piece, when the injector is installed in place, the connection end of the injector extends out, the bottom surface of a needle cylinder of the injector is abutted against the far end blocking piece, the operating rod is used for driving a piston rod of the injector, one end of the operating rod extends into the shell from the near end, and the other end of the operating rod is exposed outside the shell for operation. The balloon pressure pump can be repeatedly used, so that the cost can be saved, and the balloon pressure pump is environment-friendly.

Description

Balloon pressure pump

Technical Field

The invention relates to the technical field of medical instruments, in particular to a reusable balloon pressure pump.

Background

In the operation of dilating the narrow part of the human body cavity, the balloon pressure pump is used for pressurizing the medical balloon to dilate the medical balloon, and the dilated medical balloon directly props up the narrow part, or the dilated medical balloon props up the stent sleeved on the medical balloon, and then the narrow part is propped up by the stent; after the dilatation operation is completed, the balloon pressure pump is used for decompressing the medical balloon, so that the medical balloon can be taken out from the cavity and the tract of the human body. Currently, balloon pressure pumps on the market are generally disposable, and can be directly used in an operation and can be discarded after being used up. However, the balloon pressure pump needs to realize the functions of pressurizing, pressure releasing, pressure detecting and the like, so that the balloon pressure pump is high in manufacturing precision, more in parts, complex in structure, high in manufacturing cost, capable of causing great waste due to one-time use and capable of causing adverse effects on the environment.

Disclosure of Invention

The invention aims to provide a balloon pressure pump which can be repeatedly used, thereby saving the cost and being environment-friendly.

In order to achieve the purpose, the invention adopts the following technical scheme:

a balloon pressure pump is used for pressurizing and decompressing a medical balloon. The balloon pressure pump includes a housing and a lever. The casing has relative distal end and near-end that sets up, the casing is inside to be close to the distal end has seted up the installation cavity for detachably installs the syringe, distal end department is provided with distal end separation blade, just set up on the distal end separation blade with the intercommunicating pore of installation cavity intercommunication, the aperture of intercommunicating pore is less than the diameter of the bottom surface of the cylinder of syringe, and with the external diameter phase-match of the link of syringe, when the syringe is installed in place, the intercommunicating pore supplies the link of syringe stretches out, and the bottom surface of the cylinder of syringe with the distal end separation blade supports. The operating rod is used for driving a piston rod of the injector, one end of the operating rod extends into the shell from the near end, and the other end of the operating rod is exposed to the outside of the shell for operation.

In one embodiment, the housing is made of a metallic material.

In one embodiment, the housing is made of stainless steel or an aluminum alloy.

In one embodiment, a portion of the housing corresponding to the mounting cavity is a first section.

In one embodiment, the first section is a circular tube, and an inner cavity of the circular tube is the installation cavity.

In one embodiment, the side wall of the same side of the first segment is cut away along the axial direction of the first segment to form an installation opening communicated with the installation cavity, one side of the far-end baffle is penetrated to form a communication opening communicated with the communication hole, and the orientation of the communication opening is consistent with that of the installation opening. Alternatively, the distal flap may be removably attached to the distal end, e.g., threadably attached.

In one embodiment, at least one horseshoe-shaped positioning piece is arranged in the mounting cavity, and the opening of the positioning piece is in the same orientation as the mounting opening.

In one embodiment, there are two positioning pieces, and the two positioning pieces are respectively arranged at two opposite ends of the installation cavity and used for clamping two opposite ends of the syringe.

In one embodiment, the positioning piece is fixedly installed in the installation cavity or detachably installed in the installation cavity.

In one embodiment, the positioning sheet is detachably installed in the installation cavity and is provided with a plurality of positioning sheets with different opening sizes.

In one embodiment, the balloon pressure pump further comprises a locking assembly for locking or unlocking the syringe.

In one embodiment, the locking assembly includes a pressing plate, a mounting post, a first elastic member, a guide post, and a locking member. The pressing sheet comprises an arc-shaped part and a connecting part arranged at one end of the arc-shaped part, and the radius of the arc-shaped part is matched with the outer diameter of the needle cylinder of the injector. The mounting column is of a hollow structure with two open ends, the mounting column is arranged on the first section, and the axis of the mounting column is perpendicular to the axis of the first section. The guide post is also of a hollow structure with two open ends, the first elastic piece is sleeved outside the guide post, and the first elastic piece and the guide post are accommodated inside the mounting post. The locking piece extends into the bottom of the guide column and penetrates out of the top of the guide column to be detachably connected with the connecting part. When the locking piece is connected with the connecting part, the arc-shaped part is clamped on the outer surface of the needle cylinder of the injector, and the injector is locked; when the locking member is separated from the connecting portion, the arc-shaped portion is removed from the syringe, and the syringe is unlocked.

In one embodiment, the mounting post is integrally formed with the first segment.

In one embodiment, the locking member is a screw, and the connecting portion has a corresponding thread formed therein, and the locking member is threadedly coupled to the connecting portion.

In one embodiment, the first elastic member is a spring or an elastic rubber sleeve.

In one embodiment, the locking assembly includes an elastic cord and a catch. The one end of elasticity rope is fixed to be set up the one side of first section, the other end of elasticity rope is provided with the snap ring, the buckle sets up the opposite side of first section, and can with snap ring detachably block.

In one embodiment, the housing further comprises a second section located between the first section and the proximal end. And the inside of the second section is provided with an accommodating cavity communicated with the mounting cavity.

In one embodiment, the second section is a circular tube, and an inner cavity of the circular tube is the accommodating cavity.

In one embodiment, the connecting wall between the first section and the second section is an arcuate wall.

In one embodiment, the balloon pressure pump further comprises a pressure detection display assembly. The pressure detection display assembly is arranged on the second section and at least partially positioned in the accommodating cavity.

In one embodiment, the pressure detection display assembly comprises a pressure gauge, a cylinder and a connecting piece. The oil cylinder and the connecting piece are both positioned in the accommodating cavity. The manometer includes gauge outfit and joint. The oil cylinder comprises a cylinder body and a push rod. An oil storage cavity for storing liquid oil is formed in the cylinder body. The gauge outfit is exposed outside the second section, can display and can be used for reading the pressure value. One end of the joint is connected with the gauge outfit, and the other end of the joint is connected with the cylinder body. One end of the push rod extends into the oil storage cavity, and the other end of the push rod is connected with the operating rod through the connecting piece. The operating rod can drive the cylinder body to move, and then the cylinder body drives the piston rod of the injector. Meanwhile, under the reaction force of the piston rod of the injector, the operating rod drives the push rod to compress the space of the oil storage cavity. The pressure gauge is used for detecting and displaying the pressure value in the oil storage cavity.

In one embodiment, a first guide groove is formed in the side wall of the cylinder body along the axial direction of the cylinder body, a guide protrusion is arranged on the wall of the accommodating cavity corresponding to the first guide groove, or a guide protrusion is arranged on the side wall of the cylinder body along the axial direction of the cylinder body, a first guide groove is formed in the wall of the accommodating cavity corresponding to the guide protrusion, and the first guide groove is matched with the guide protrusion to guide the movement of the cylinder body.

In one embodiment, the side wall of the second section is correspondingly provided with a second guide groove along the axial direction of the second section, and the joint passes through the second guide groove and then extends into the accommodating cavity to be connected with the cylinder body.

In one embodiment, the bottom wall of the cylinder body is recessed inwardly to form a receiving groove.

In one embodiment, the cylinder is cylindrical.

In one embodiment, the cylinder diameter of the cylinder is equal to the inner diameter of the barrel of the injector.

In one embodiment, the middle portion of the cylinder body is recessed inwardly.

In one embodiment, an oil filling hole communicated with the oil storage cavity is formed in the side wall of the cylinder body.

In one embodiment, the fitting is inserted into the oil filler hole for closing the oil filler hole.

In one embodiment, a sealing ring is arranged between the joint and the wall of the oil filling hole.

In one embodiment, the pressure detection display assembly comprises a sliding sleeve, a gland, a connecting piece, an indicating block and a third elastic piece. The sliding sleeve is contained in the containing cavity in a sliding mode, an opening is formed in the upper end of the sliding sleeve, the gland is installed from the opening of the sliding sleeve and is arranged in the sliding sleeve in a sliding mode, the connecting piece is used for connecting the operating rod with the gland, a third guide groove is formed in the side wall of the sliding sleeve, the indicating block is located in the third guide groove and connected with the gland, a window is formed in the second section, the indicating block is exposed through the window, and the third elastic piece is arranged in the sliding sleeve and located between the gland and the bottom wall of the sliding sleeve. The operating rod can drive the sliding sleeve to move, and then the sliding sleeve drives the piston rod of the injector. Meanwhile, under the reaction force of the piston rod of the injector, the operating rod drives the gland to compress the third elastic part, and the gland drives the indicating block to move. And a pressure value scale table is arranged on the second section or on the sliding sleeve, and the indicating block is used for indicating a pressure value on the pressure value scale table.

In one embodiment, the third elastic member has an elastic modulus of 2.5 to 10N/mm.

In one embodiment, the bottom wall of the sliding sleeve is recessed inwardly to form a receiving groove.

In one embodiment, a fourth guide groove is further formed in the side wall of the sliding sleeve, opposite to the third guide groove, a guide post is arranged on the gland, opposite to the indication block, and the guide post moves along the fourth guide groove in the process that the gland compresses the third elastic element.

In one embodiment, a fifth guide groove is further formed in the second section corresponding to the fourth guide groove, and the guide column moves along the fifth guide groove in the process that the operating rod drives the sliding sleeve to move.

In one embodiment, the balloon pressure pump further comprises a switching assembly. The switching assembly is at least partially mounted in the receiving cavity, the operating rod passes through the switching assembly, and the switching assembly enables the operating rod to be switched between a push-pull type and a rotary type.

In one embodiment, the switching assembly includes two mating blocks, a second elastic member, and a clamping member. Two the cooperation piece sets up relatively, seted up threaded cooperation groove on the internal surface of cooperation piece. The second elastic piece is arranged between the two matching blocks. The clamp is slidably disposed on an outer surface of the mating block. The lever includes a threaded shaft portion. The rod part penetrates between the two matching blocks. When the clamping piece is slid to overcome the elasticity of the second elastic piece to clamp the two matching blocks, the matching grooves are matched to form a matching hole with threads, the hole wall of the matching hole clamps the rod part, the threads of the rod part are matched with the threads of the matching hole, and the operating rod is switched to a rotary mode; when the clamping piece is slid to release the clamping action on the two matching blocks, the two matching blocks are separated from each other under the action of the elastic force of the second elastic piece, so that the clamping action of the hole wall of the matching hole on the rod part is released, and the operating rod is switched to a push-pull mode.

In one embodiment, the sliding direction of the clamping member is perpendicular to the axial direction of the second section.

In one embodiment, the second elastic members are two, and two of the second elastic members are disposed on opposite sides of the fitting groove.

In one embodiment, the mating block has a receiving groove formed on an outer surface thereof. The clamping piece comprises a bottom plate and a clamping part convexly arranged on the bottom plate. The bottom wall of the containing groove is an inclined surface, the bottom surface of the clamping part is also an inclined surface, and under the matching action of the inclined surface of the containing groove and the inclined surface of the clamping part, the clamping part can slide into or out of the containing groove. When the clamping part slides out of the accommodating groove, the clamping part overcomes the elasticity of the second elastic piece to clamp the two matching blocks; when the clamping part slides into the accommodating groove, the clamping action of the clamping part on the two matching blocks is released.

In one embodiment, four of the clamping portions are respectively arranged at four corners of the bottom plate, four of the accommodating grooves are also arranged, and two accommodating grooves are formed in each of the matching blocks.

In one embodiment, the switching assembly further includes an operation piece, the operation piece includes a connection section and an operation section, the bottom plate is correspondingly provided with an installation ear, and the second section is provided with a through groove. One end of the connecting section is connected with the mounting lug, and the other end of the connecting section extends out of the shell through the through groove and is connected with the operating section.

In one embodiment, the connecting section and the operating section are perpendicular, and the operating section is disposed along an axial direction of the second section.

In one embodiment, the switching assembly further comprises a mount. The upper surface epirelief of mount pad is equipped with the installing frame, the upper end of installing frame has the opening, two cooperation piece with the second elastic component passes through the opening of installing frame all sets up in the installing frame, correspond on the side of installing frame the accepting groove has seted up the inserted hole, the clamping part passes behind the inserted hole slidable accept in the accepting groove.

In one embodiment, the switching assembly further comprises a pressure plate and a gasket. The gasket is covered on the opening of the mounting frame, and the pressing plate is covered on the gasket.

In one embodiment, the switching assembly further comprises a positioning sleeve and a support column. The upper end of the positioning sleeve is outwards convexly provided with an outer edge, a step is correspondingly arranged on the cavity wall of the accommodating cavity, the positioning sleeve is supported on the step through the outer edge, and the mounting seat is supported on the outer edge. It is protruding to be provided with the location on the chamber wall of acceping the chamber, the support column includes vertical portion and horizontal part, the position sleeve the mount pad the gasket and first location breach, second location breach, third location breach and fourth location breach have been seted up on the clamp plate respectively, vertical portion with the protruding laminating of location, just vertical portion together with the protruding together card of location is gone into of location first location breach the second location breach third location breach and in the fourth location breach, just the horizontal part card is gone into the third location breach and in the fourth location breach.

In one embodiment, the lever further comprises a handle disposed at one end of the lever portion.

In one embodiment, a proximal end stop is disposed on the proximal end, an end of the rod portion opposite to the handle extends through the proximal end stop, and the handle and the proximal end stop cooperate to limit the stroke of the operating rod.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a balloon pressure pump, which is not provided with a chamber for storing pressurized fluid, but is provided with a mounting cavity for mounting a syringe, the pressurized fluid is stored through the syringe, and the syringe can be connected and communicated with a high-pressure catheter. After the operation is finished, only the medical saccule, the high-pressure catheter and the injector are discarded, and the saccule pressure pump can be repeatedly used, so that the cost can be saved, and the invention is environment-friendly.

Drawings

Fig. 1 is a schematic structural diagram (with a syringe installed) of a balloon pressure pump according to embodiment 1 of the present invention.

Fig. 2 is a sectional view of the balloon pressure pump shown in fig. 1 (with the pressure gauge omitted).

Fig. 3 is a schematic view of the assembly of the housing and locking assembly of the balloon pressure pump shown in fig. 1.

Fig. 4 is an exploded schematic view (with connectors omitted) of a pressure detection display assembly of the balloon pressure pump shown in fig. 1.

Fig. 5 is a front view of a cylinder of the pressure detection display assembly shown in fig. 4.

Fig. 6 is an exploded schematic view of the switching assembly of the balloon pressure pump shown in fig. 1.

Fig. 7 is a perspective view of the switching assembly shown in fig. 6 (omitting the position sleeve, pressure plate, spacer and support post).

Fig. 8 is a perspective view of a pressure detection display assembly of a balloon pressure pump according to embodiment 2 of the present invention.

Fig. 9 is a front view of the pressure detection display assembly shown in fig. 8.

Fig. 10 is a sectional view of the pressure detection display assembly shown in fig. 8.

Reference numerals:

the pressure detection and display device comprises a shell 1, an operating rod 2, a locking component 3, pressure detection and display components 4 and 6, a switching component 5, a far end 11, a near end 12, a far end baffle 13, a near end baffle 14, a first section 15, a second section 16, a rod part 21, a handle 22, a pressing sheet 31, a mounting column 32, a first elastic member 33, a guide column 34, a locking member 35, a pressure gauge 41, an oil cylinder 42, connecting members 43 and 63, a matching block 51, a second elastic member 52, a clamping member 53, an operating sheet 54, a mounting seat 55, a positioning sleeve 56, a pressing plate 57, a gasket 58, a supporting column 59, a sliding sleeve 61, a pressing cover 62, an indicating block 64, a third elastic member 65, a communication hole 131, a communication port 132, a mounting cavity 151, a mounting hole 152, a positioning sheet 153, a containing cavity 161, a guide projection 162, a step 163, a positioning projection 164, a second guide groove 165, a through groove 166, an arc-shaped part 311, the push rod 422, the first guide groove 423, the accommodating grooves 424 and 611, the oil storage cavity 425, the oil filling hole 426, the matching groove 511, the matching hole 512, the accommodating groove 513, the bottom plate 531, the clamping part 532, the mounting lug 533, the connecting section 541, the operating section 542, the mounting frame 551, the insertion opening 552, the second positioning notch 553, the outer edge 561, the first positioning notch 562, the third positioning notch 581, the fourth positioning notch 571, the fourth guide groove 612, the third guide groove 613 and the guide post 614.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a balloon pressure pump including a housing 1 and an operation rod 2. The housing 1 has oppositely disposed distal and proximal ends 11, 12. A mounting cavity 151 is defined in the housing 1 near the distal end 11 for detachably mounting a syringe (not shown). The far end 11 is provided with a far end baffle 13, the far end baffle 13 is provided with a communication hole 131 communicated with the mounting cavity 151, the aperture of the communication hole 131 is smaller than the diameter of the bottom surface of the syringe (not shown) of the injector and is matched with the outer diameter of the connecting end (not shown) of the injector, when the injector is mounted in place, the connecting end of the injector extends out from the communication hole 131, and the bottom surface of the syringe of the injector is propped against the far end baffle 13. The operating rod 2 is used to drive the piston rod (not shown) of the syringe, it being understood that the drive may be a direct drive or an indirect drive, for example, the operating rod 2 is connected to an intermediate member (not shown) which is moved by the operating rod 2 and from which the piston rod of the syringe is driven. One end of the operating rod 2 extends from the proximal end 12 into the interior of the housing 1, and the other end is exposed to the exterior of the housing 1 for operation. In the operation of dilating the narrow part of the body lumen, firstly, the injector is enabled to extract a certain amount of pressurized fluid (the pressurized fluid can be physiological saline, contrast fluid and other fluids meeting the operation requirements, without limitation), then the connecting end of the injector is connected and communicated with a high-pressure catheter (not shown in the figure), the high-pressure catheter is connected and communicated with a medical balloon (not shown in the figure), then the injector is installed in the installation cavity 151, the connecting end of the injector extends out through the communicating hole 131, the bottom surface of the syringe cylinder of the injector is abutted against the distal baffle 13, finally, after the medical balloon is placed at the narrow part of the body lumen, the operating rod 2 is used for driving the piston rod of the injector to move towards the distal end 11, so that the pressurized fluid in the syringe cylinder of the injector flows into the medical balloon through the high-pressure catheter, and the medical balloon is thereby dilated. After the expansion operation is completed, the driving force of the operating rod 2 to the piston rod of the injector is removed, and the piston rod of the injector can be at least partially automatically reset, so that the pressurized fluid in the medical balloon is at least partially automatically drawn back, and the medical balloon can be taken out. If the amount of the pressurized fluid in the medical balloon which is automatically withdrawn is not ideal enough, the syringe can be taken out from the installation cavity 151, and the piston rod of the syringe is directly pulled back, so that the pressurized fluid is further withdrawn until the medical balloon can be taken out. After the medical saccule is taken out, the medical saccule, the high-pressure catheter and the injector are all discarded, and the saccule pressure pump can be reused.

The existing balloon pressure pump comprises a cavity for storing pressurized fluid, and a rubber plug is arranged in the cavity and used for preventing the pressurized fluid from flowing out automatically. The pressurized fluid is not reusable, depending on the surgical requirements, and the chamber needs to be cleaned and sterilized before new pressurized fluid can be withdrawn. However, most of the chambers of the existing balloon pressure pump are made of plastic, and the chambers and the rubber plugs made of plastic cannot be cleaned and sterilized repeatedly, so that the existing balloon pressure pump can be used only once. In this embodiment, the balloon pressure pump is not provided with a chamber for storing pressurized fluid, but is provided with an installation cavity 151 for installing an injector, so that an operator can select a sterilized disposable injector, store pressurized fluid through the injector, connect and communicate the injector with a high-pressure catheter, connect and communicate the injector with the medical balloon through the high-pressure catheter, and finally place the injector into the installation cavity 151. Since the syringe, the high-pressure catheter and the medical balloon are connected first and then the syringe is placed in the mounting cavity 151, and the high-pressure catheter is long, the balloon pressure pump of the embodiment does not contact and contaminate the medical balloon. After the operation is finished, only the medical balloon, the high-pressure catheter and the injector are discarded, and the balloon pressure pump of the embodiment can be repeatedly used, so that the cost can be saved, and the balloon pressure pump is environment-friendly. In addition, in this embodiment, the connection end of the injector only passes through the communication hole 131, and the bottom surface of the syringe of the injector abuts against the distal end baffle 13, so that on one hand, the balloon pressure pump can be prevented from contacting the high-pressure catheter, and further the balloon pressure pump can be prevented from polluting the medical balloon through the high-pressure catheter, and on the other hand, the injector can be conveniently driven.

The housing 1 may be made of a metal material, for example, stainless steel or aluminum alloy. Referring to fig. 1 and 3, a portion of the housing 1 corresponding to the mounting cavity 151 is a first section 15. Considering that the prior art syringe is generally cylindrical, in order to adapt to the shape of the syringe, the first section 15 is designed as a circular tube, and the inner cavity of the circular tube is the mounting cavity 151.

Further, the side wall of the same side of the first segment 15 is cut off along the axial direction of the first segment 15 to form a mounting opening 152 communicated with the mounting cavity 151, one side of the distal end baffle 13 is penetrated to form a communication opening 132 communicated with the communication hole 131, and the orientation of the communication opening 132 is consistent with that of the mounting opening 152, so that the loading and unloading of the syringe can be facilitated. It will be appreciated that in other embodiments, not shown, loading and unloading of the syringe may be facilitated by other means, for example, the distal flap 13 may be removably attached (e.g., threaded) to the distal end 11, and removal of the distal flap 13 may allow loading and unloading of the syringe from the distal end 11.

Further, at least one horseshoe-shaped positioning piece 153 is arranged in the mounting cavity 151, so that the syringe can be prevented from rolling freely in the mounting cavity 151, and the syringe can be adjusted to a proper height under the support of the positioning piece 153, so that the driving force can be conveniently applied to the piston rod of the syringe. The orientation of the opening of the locating tab 153 is aligned with the orientation of the mounting opening 152 so that when a syringe is placed in the mounting cavity 151, the syringe snaps into the locating tab 153. In this embodiment, two positioning tabs 153 are provided at opposite ends of the mounting chamber 151 for engaging opposite ends of the syringe. It is understood that the positioning plate 153 may be fixedly installed in the installation cavity 151, or may be detachably installed in the installation cavity 151. In one embodiment, the positioning plate 153 is detachably installed in the installation cavity 151 and is provided with a plurality of positioning plates 153 with different opening sizes, and the positioning plate 153 with the opening size matched with the outer diameter of the syringe barrel can be selected when in use.

In addition, it is considered that the syringe is easily dropped out of the mounting chamber 151 after the mounting port 152 and the communication port 132 are provided. In order to solve this technical problem, the balloon pressure pump of the present embodiment further includes a locking assembly 3 for locking or unlocking the syringe. The locking assembly 3 includes a pressing plate 31, a mounting post 32, a first elastic member 33, a guide post 34, and a locking member 35. The pressing sheet 31 includes an arc portion 311 and a connecting portion 312 disposed at one end of the arc portion 311, and a radius of the arc portion 311 matches with an outer diameter of the syringe of the injector, so that the arc portion 311 can be clamped on an outer surface of the syringe of the injector in a locking state. The mounting post 32 is a hollow structure with two open ends, the mounting post 32 is disposed on the first segment 15, and the axis of the mounting post 32 is perpendicular to the axis of the first segment 15, in one embodiment, the mounting post 32 is integrally formed with the first segment 15. The guide post 34 is also a hollow structure with two open ends, the first elastic element 33 is sleeved outside the guide post 34, and the first elastic element 33 is accommodated inside the mounting post 32 together with the guide post 34. The locking member 35 extends into the bottom of the guide post 34 and extends out of the top of the guide post 34 to be detachably connected to the connecting portion 312. When the locking member 35 is connected to the connecting portion 312, the arc portion 311 can be clamped on the outer surface of the syringe, i.e., the arc portion 311 locks the syringe, which can prevent the syringe from falling out; when the retaining member 35 is disengaged from the coupling portion 312, the arcuate portion 311 can be removed from the syringe, i.e. the arcuate portion 311 unlocks the syringe, at which point the syringe can be removed. In this embodiment, the locking member 35 is a screw, and a thread is correspondingly disposed in the connecting portion 312, and the locking member 35 is in threaded connection with the connecting portion 312. It will be appreciated that in other embodiments not shown, the retaining member 35 and the connecting portion 312 may be detachably connected, such as by a snap-fit connection, without limitation. In addition, the first elastic member 33 may be an element having elasticity, such as a spring or an elastic rubber sleeve, and is not limited herein. It will be appreciated that in other embodiments not shown, other configurations of locking assemblies may be used, as long as they can be used to lock or unlock the syringe, for example, the locking assemblies include an elastic cord and a snap. The fixed setting in one side of first section 15 of one end of elastic cord, the other end are provided with the snap ring, and the buckle setting is at the opposite side of first section 15, and can with snap ring detachably block.

Typically, the syringe barrel is graduated so that the operator can clearly know the amount of pressurized fluid being delivered during the pressurizing operation. A corresponding relation table can be designed, and the pressure value in the medical saccule can be obtained according to the type and the volume of the pressurized fluid. However, it is considered that the operation time is at a premium, and the operator would prefer to be able to read the pressure value directly by a pressure gauge or other related device. Further, since air may be contained in the high-pressure catheter and the medical balloon and the amount of the contained air is unknown, a pressure value calculated based on the type and volume of the pressurized fluid may greatly deviate from an actual pressure value. However, the syringe is not provided with a pressure gauge, and the adapter of the pressure gauge cannot be directly inserted into the syringe. Based on the technical problem, as shown in fig. 1 to 5, in this embodiment, the balloon pressure pump further includes a pressure detection display component 4, and a numerical value displayed by the pressure detection display component 4 is used for representing a pressure value in the medical balloon. Correspondingly, the housing 1 further includes a second section 16 located between the first section 15 and the proximal end 12, the second section 16 defines a receiving cavity 161 therein, the receiving cavity 151 is communicated with the receiving cavity, and the pressure detection display assembly 4 is disposed on the second section 16 and at least partially located in the receiving cavity 161.

Specifically, the pressure detection display assembly 4 includes a pressure gauge 41, a cylinder 42, and a connection member 43. The oil cylinder 42 and the connecting piece 43 are both positioned in the containing cavity 161. The pressure gauge 41 includes a gauge head 411 and a joint 412. The oil cylinder 42 includes a cylinder 421 and a push rod 422. An oil storage chamber 425 storing liquid oil is formed in the cylinder 421, and the pressure gauge 41 is used for detecting and displaying a pressure value in the oil storage chamber 425. The gauge head 411 is exposed to the outside of the second section 16, and can display and read the pressure value. One end of the joint 412 is connected to the gauge head 411, and the other end is connected to the cylinder 421. One end of the push rod 422 is inserted into the oil chamber 425, and the other end of the push rod 422 is connected to the operation rod 2 through the connecting member 43. Therefore, the operating rod 2 can drive the cylinder 421 to move, and then the cylinder 421 drives the piston rod of the injector, so that the piston rod of the injector drives the pressurized fluid to flow into the medical balloon. Meanwhile, under the reaction force of the piston rod of the syringe, the operation rod 2 drives the push rod 422 to compress the space of the oil chamber 425, so that the liquid oil in the oil chamber 425 is compressed. The pressure value within the reservoir chamber 425 may represent the pressure value within the medical balloon, depending on the force and reaction. In this embodiment, in order to make the pressure value in the oil storage chamber 425 better represent the pressure value in the medical balloon, the cylinder diameter of the cylinder 421 is substantially equal to the inner diameter of the syringe barrel. Although some energy is lost during the force transfer process, repeated testing by the inventors has revealed that the energy loss is small during the process, and thus the pressure in the reservoir chamber 425 is only slightly greater than the pressure in the medical balloon. In one embodiment, the energy loss may be ignored, and the pressure gauge 41 directly reads the pressure value in the reservoir chamber 425, and directly represents the pressure value in the medical balloon; in another embodiment, the energy loss may be calculated and then the pressure gauge 41 may be corrected such that the pressure gauge 41 displays the corrected value in consideration of the energy loss.

In this embodiment, the cylinder 421 is substantially cylindrical, and the middle portion of the cylinder 421 is recessed inward to reduce the contact area with the wall of the receiving chamber 161, so that the energy loss during the transmission of the force can be reduced.

In order to adapt to the shape of the cylinder 421, the second section 16 is designed as a circular tube, and the inner cavity of the circular tube is the receiving cavity 161. The cylinder 42 can move along the axial direction of the second section 16 smoothly and enter the mounting chamber 151 to drive the piston rod of the syringe. The diameter of the first section 15 and the diameter of the second section 16 may be equal or different, and are designed according to practical requirements, and are not limited herein. For convenience of use and avoidance of injury to the operator, the connecting wall (not shown) between the first section 15 and the second section 16 is designed as an arcuate wall. It will be appreciated that in other embodiments, not shown, if the cylinder 421 is designed in other shapes, the second section 16 is correspondingly designed in other shapes, for example, a square tube. Further, a first guide groove 423 is formed in the side wall of the cylinder 421 along the axial direction of the cylinder 421, a guide protrusion 162 is formed on the wall of the accommodating cavity 161 corresponding to the first guide groove 423, and the first guide groove 423 is matched with the guide protrusion 162 to guide the movement of the oil cylinder 42. It is understood that, in other embodiments not shown, the cylinder 421 may be provided with a guide protrusion 162, and the cavity wall of the receiving cavity 161 is provided with a first guide groove 423, which is not limited herein. Since the pressure gauge 41 is connected to the cylinder 42, the cylinder 42 moves and the pressure gauge 41 also moves. For this purpose, a second guide groove 165 is correspondingly formed in the sidewall of the second section 16 along the axial direction of the second section 16, and the joint 412 passes through the second guide groove 165 and then extends into the receiving cavity 161 to be connected to the cylinder 421, so that the pressure gauge 41 can move along the second guide groove 165.

In addition, the bottom wall of cylinder 421 is recessed inwards to form a receiving groove 424, so that the end of the plunger rod of the syringe can be snapped into the receiving groove 424 to facilitate the cylinder 421 to apply force to the plunger rod of the syringe.

In order to make the pressure detection display unit 4 occupy as small a space as possible, the cylinder 421 is made as small as possible, and therefore, the space of the oil chamber 425 is small and the stroke for moving the push rod 422 is small. In addition, volatilization, deterioration, etc. of the liquid oil affects the pressure in the oil reservoir 425. Based on the above, it is necessary to use a stable liquid oil which is not easily deformed and volatilized. In addition, other inert liquids that are not easily deformable, not easily volatile, and stable are also contemplated. An oil filling hole 426 communicated with the oil storage cavity 425 is formed in the side wall of the cylinder 421, and liquid oil can be filled into the oil storage cavity 425 through the oil filling hole 426. The joint 412 of the pressure gauge 41 may be used to close the oil hole 426, and in particular, the joint 412 is inserted in the oil hole 426. To further prevent the liquid oil from leaking, a sealing ring (not shown) may be disposed between the joint 412 and the wall of the oil hole 426, and the outside of the joint 412 is fixed by glue to prevent loosening.

According to the foregoing, the operating rod 2 needs to be able to move along the axial direction of the housing 1, so as to be able to drive directly, or indirectly, the piston rod of the syringe through the pressure detection display assembly 4. Thus, the operating lever 2 can be arranged in a push-pull or rotary manner. The push-pull operating rod can move back and forth through the push-pull action, the generated stroke is large, and the push-pull operating rod is suitable for roughly adjusting the pressure in the medical saccule; the rotary operating rod is a threaded rod, can be matched with threads, can move back and forth under the rotary operation, has a small stroke, and is suitable for finely adjusting the pressure in the medical balloon. In addition, it should be noted that 1) when the push-pull operating rod is adopted, pressure maintaining is difficult to realize, when an operator stops driving the push-pull operating rod, the push-pull operating rod is easy to reset, so that the medical saccule is decompressed, and the rotary operating rod can be fixed through threads, so that the pressure maintaining can be realized; 2) at the later stage of the pressurizing process, because the pressure in the medical saccule is already large, an operator is difficult to push the push-pull operating rod, so that the pressure in the medical saccule reaches a target value, and when the rotary operating rod is adopted, the generated driving force is large, so that the pressurizing fluid can smoothly enter the medical saccule, and the pressure in the medical saccule reaches the target value. For the balloon pressure pump of the present embodiment, if the two types of operation levers exist at the same time and can be switched according to actual needs, it is very advantageous for actual operation. Specifically, at the pressurization in-process, the operation mode that operating rod 2 used in earlier stage is plug-type, and the operation mode that the later stage was used is the rotation type, after the pressurization for operating rod 2 maintains the rotation type, so that the pressurize, when treating that the operation end needs the pressure release, switches operation mode to plug-type, thereby can make things convenient for the pressure release.

Referring to fig. 1, 2, 6 and 7, the balloon pressure pump of the present embodiment further includes a switch assembly 5 for switching the operation mode of the operation rod 2. The switch assembly 5 is at least partially installed in the housing 161 and located between the pressure detecting and displaying assembly 4 and the proximal end 12, and the operation rod 2 is connected to the detecting and displaying assembly 4 after passing through the switch assembly 5. The switching assembly 5 includes two fitting blocks 51, a second elastic member 52, and a clamping member 53. Two cooperation blocks 51 set up relatively, offer the cooperation groove 511 that has the screw thread on the internal surface of cooperation block 51, and second elastic component 52 sets up between two cooperation blocks 51, and in this embodiment, second elastic component 52 has two, sets up in the relative both sides of cooperation groove 511, can be to two balanced application of force of cooperation block 51, and holder 53 sets up on the surface of cooperation block 51 slidable. The operating lever 2 comprises a threaded shaft portion 21. The rod 21 passes between the two fitting blocks 51 and is connected to the push rod 422 through the connecting member 43. When the clamping members 53 to 53 are slid to clamp the two fitting blocks 51 against the elastic force of the second elastic member 52, the fitting grooves 511 are fitted to form the fitting holes 512 with threads, the hole walls of the fitting holes 512 clamp the rod portion 21, the threads of the rod portion 21 are fitted to the threads of the fitting holes 512, and at this time, the operation rod 2 is rotated, so that the operation rod 2 moves along the axial direction of the housing 1 by rotating the operation rod 2. When the clamping piece 53 is slid to release the clamping action on the two matching blocks 51, the two matching blocks 51 are separated from each other under the elastic force of the second elastic piece 52, so that the clamping action of the hole wall of the matching hole 512 on the rod part 21 is released, at this time, the operating rod 2 is in a push-pull type, and the operating rod 2 is pushed and pulled to move along the axial direction of the shell 1. In order to facilitate the pushing and pulling or rotating of the operating lever 2, the operating lever 2 further includes a knob 22 provided at one end of the lever portion 21. In addition, a proximal end stop piece 14 is provided on the proximal end 12 of the housing 1, and the other end of the rod portion 21 passes through the proximal end stop piece 14 and then passes between the two fitting blocks 51 to be connected to the push rod 422 through the connecting member 43. The handle 22 cooperates with the proximal flap 14 to limit the travel of the operating rod 2.

Referring to fig. 6 and 7 again, the mating block 51 has a receiving groove 513 formed on an outer surface thereof, and the clamping member 53 includes a bottom plate 531 and a cylindrical clamping portion 532 protruding from the bottom plate 531. The bottom wall of the receiving groove 513 is an inclined surface, and correspondingly, the bottom surface of the clamping portion 532 is also an inclined surface, so that the clamping portion 532 can slide into or out of the receiving groove 513 under the matching action of the inclined surface of the receiving groove 513 and the inclined surface of the clamping portion 532, and the sliding direction of the clamping portion 532 is perpendicular to the axial direction of the second section 16. Specifically, when the clamping portion 532 slides out of the accommodating groove 513, the clamping portion 532 clamps the two mating blocks 51 against the elastic force of the second elastic member 52; when the clamping portion 532 slides into the housing groove 513, the clamping action of the clamping portion 532 on the two engagement blocks 51 is released. In this embodiment, four clamping portions 532 are provided at four corners of the bottom plate 531, and correspondingly, four receiving grooves 513 are provided, and two receiving grooves 513 are provided for each of the mating blocks 51, so that the mating blocks 51 can be uniformly biased during the clamping process. For the convenience of the operator, the switching assembly 5 further includes an operation piece 54, the operation piece 54 includes a connection section 541 and an operation section 542, the operation section 542 is disposed along the axial direction of the first section 16, and the connection section 541 is perpendicular to the operation section 542. The bottom plate 531 of the clamp 53 is correspondingly provided with mounting ears 533. One end of the connecting section 541 is connected to the mounting lug 533, and the other end of the connecting section 541 extends out of the housing 1 through the through slot 166 formed in the second section 16 and is connected to the operating section 542, so that the operator can push and pull the operating section 542 to drive the clamping member 53 to slide.

The switch assembly 5 further includes a mounting block 55, a locating sleeve 56, a pressure plate 57, a spacer 58, and a support post 59. The mounting base 55 is substantially disc-shaped, a mounting frame 551 is convexly arranged on the upper surface of the mounting base 55, an opening is formed in the upper end of the mounting frame 551, the two matching blocks 51 and the second elastic element 52 are both arranged in the mounting frame 551 through the opening of the mounting frame 551, the mounting frame 551 can prevent the two matching blocks 51 from being excessively separated under the elastic force of the second elastic element 52, an insertion opening 552 is formed in the side surface of the mounting frame 551 corresponding to the accommodating groove 513, and the clamping portion 532 is slidably accommodated in the accommodating groove 513 after passing through the insertion opening 552. The positioning sleeve 56 is substantially cylindrical, a hollow part can be disposed on a side wall of the positioning sleeve 56 to save material, an outer edge 561 is disposed at an upper end of the positioning sleeve 56 and protrudes outward, referring to fig. 3, a step 163 is correspondingly disposed on a cavity wall of the accommodating cavity 161, and the positioning sleeve 56 is supported on the step 163 through the outer edge 561. The mounting 55 is supported on an outer edge 561. The gasket 58 is covered on the opening of the mounting frame 551, the pressing plate 57 is covered on the gasket 58, and the arrangement of the gasket 58 and the pressing plate 57 can prevent the matching block 51 from being ejected from the opening of the mounting frame 551 under the action of the elastic force of the second elastic element 52. It will be appreciated that the pressure plate 57, the spacer 58, the two fitting blocks 51, the mounting seat 55, and the positioning sleeve 56 are all configured to allow the rod portion 21 to pass through, so that the rod portion 21 can be connected to the push rod 422 through the connecting member 43. The cavity wall of the accommodating cavity 161 is provided with a positioning protrusion 164, the supporting column 59 includes a vertical portion (not shown) and a horizontal portion (not shown), the positioning sleeve 56, the mounting seat 55, the gasket 58 and the pressing plate 57 are respectively provided with a first positioning gap 562, a second positioning gap 553, a third positioning gap 581 and a fourth positioning gap 571, the vertical portion is attached to the positioning protrusion 164, the vertical portion and the positioning protrusion 164 are clamped into the first positioning gap 562, the second positioning gap 553, the third positioning gap 581 and the fourth positioning gap 571 together, and the horizontal portion is clamped into the third positioning gap 581 and the fourth positioning gap 571, which plays a positioning role in mounting the positioning sleeve 56, the mounting seat 55, the gasket 58 and the pressing plate 57.

The present embodiment provides a balloon pressure pump which is not provided with a chamber for storing a pressurized fluid, but is provided with a mounting chamber 151 for mounting a syringe through which the pressurized fluid is stored, and which can be connected to and communicated with a high-pressure catheter. After the operation is finished, only the medical balloon, the high-pressure catheter and the injector are discarded, and the balloon pressure pump of the embodiment can be repeatedly used, so that the cost can be saved, and the balloon pressure pump is environment-friendly.

Example 2

As shown in fig. 8 to 10, the present embodiment provides another balloon pressure pump, and the pressure detection display unit is different from that of embodiment 1, and accordingly, the fitting relationship between the pressure detection display unit and the second segment 16 and the fitting relationship between the pressure detection display unit and the operation rod 2 are also different.

In the present embodiment, the pressure detection display assembly 6 includes a sliding sleeve 61, a pressing cover 62, a connecting member 63, an indicating block 64, and a third elastic member 65. The sliding sleeve 61 is slidably accommodated in the accommodating cavity 161, the upper end of the sliding sleeve 61 is provided with an opening, the gland 62 is inserted from the opening of the sliding sleeve 61 and is slidably arranged in the sliding sleeve 61, the connecting piece 63 is used for connecting the operating rod 2 and the gland 62, the side wall of the sliding sleeve 61 is provided with a third guide groove 613, the indicating block 64 is positioned in the third guide groove 613 and is connected with the gland 62, the second section 16 is provided with a window (not shown) with a pressure value scale gauge, the indicating block 64 is exposed through the window, and the third elastic piece 65 is arranged in the sliding sleeve 61 and is positioned between the gland 62 and the bottom wall of the sliding sleeve 61. The operating rod 2 can drive the sliding sleeve 61 to move, and then the sliding sleeve 61 drives the piston rod of the injector, so that the piston rod of the injector drives the pressurized fluid to flow into the medical balloon. Meanwhile, under the reaction force of the piston rod of the injector, the operating rod 2 drives the gland 62 to compress the third elastic element 65, the gland 62 drives the indicating block 64 to move, and according to the force action and the reaction force, the elastic value of the compressed third elastic element 65 can represent the pressure value in the medical balloon. Although a part of energy is lost during the transmission of the force, the inventors have repeatedly tested that the energy loss is small during the above process, and thus the elastic force of the compressed third elastic member 65 is only slightly larger than the pressure in the medical balloon. In one embodiment, the energy loss can be ignored, a third elastic member 65 with a known elastic coefficient is selected, then the elastic value is directly calculated according to hooke's law, a pressure value scale table is drawn according to the elastic value, and finally the corresponding pressure value is read according to the indication of the indication block 64; in another embodiment, the energy loss can be calculated, the elastic value calculated according to hooke's law is subtracted from the loss value to obtain a correction value, and then a pressure value scale table is drawn according to the correction value. It will be appreciated that in other embodiments, not shown, the pressure value scale could be drawn directly on the sliding sleeve 61, provided that the window is ensured to expose both the indicator block 64 and the pressure value scale.

It should be noted that, the distance that the third elastic member 65 can be compressed is limited, and the pressure that needs to be injected into the medical balloon is large, so in order to make the elastic value of the compressed third elastic member 65 represent the pressure value in the medical balloon, an elastic member with a large elastic coefficient needs to be selected. In the present embodiment, the elastic coefficient of the third elastic member 65 is 2.5 to 10N/mm.

Referring to embodiment 1, in this embodiment, the sliding sleeve 61 is substantially cylindrical, and in order to adapt to the shape of the sliding sleeve 61, the second section 16 is designed as a circular tube, and the inner cavity of the circular tube is the receiving cavity 161. The sliding sleeve 61 can move along the axial direction of the second section 16 smoothly and enter the mounting cavity 151 to drive the plunger rod of the syringe. In addition, the bottom wall of the sliding sleeve 61 is recessed inwards to form a receiving groove 611, so that the end of the plunger rod of the syringe can be clamped into the receiving groove 611, so that the sliding sleeve 61 can apply force to the plunger rod of the syringe. It will be appreciated that in other embodiments, not shown, if the sliding sleeve 61 is designed in other shapes, the second section 16 is correspondingly designed in other shapes, for example, a square tube.

In addition, a fourth guide groove 612 is formed on the side wall of the sliding sleeve 61 opposite to the third guide groove 613, and a guide post 614 is formed on the pressing cover 62 opposite to the indication block 64. The guide posts 614 may move along the fourth guide grooves 612 during the compression of the third elastic member 65 by the pressing cover 62. In addition, a fifth guide groove (not shown) is further formed on the second section 16 corresponding to the fourth guide groove 612, and the guide column 614 can also move along the fifth guide groove in the process that the operating rod 2 drives the sliding sleeve 61 to move.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (10)

1. The utility model provides a sacculus force pump for pressurize and the pressure release medical sacculus, its characterized in that: the balloon pressure pump comprises a shell and an operating rod, wherein the shell is provided with a far end and a near end which are arranged oppositely, an installation cavity is arranged in the shell close to the far end, used for detachably mounting the injector, the far end part is provided with a far end baffle, and the far end baffle is provided with a communication hole communicated with the mounting cavity, the aperture of the communicating hole is smaller than the diameter of the bottom surface of the needle cylinder of the injector and is matched with the outer diameter of the connecting end of the injector, when the injector is installed in place, the connecting end of the injector extends out from the communicating hole, the bottom surface of the syringe of the injector is propped against the far-end separation blade, the operating rod is used for driving a piston rod of the injector, one end of the operating rod extends into the shell from the near end, and the other end of the operating rod is exposed to the outside of the shell for operation.

2. A balloon pressure pump as in claim 1, wherein: the part of the shell corresponding to the installation cavity is a first section, the side wall of the same side of the first section is cut off along the axial direction of the first section to form an installation opening communicated with the installation cavity, one side of the far-end baffle sheet is penetrated to form a communication opening communicated with the communication hole, and the orientation of the communication opening is consistent with that of the installation opening.

3. A balloon pressure pump as in claim 2, wherein: the shell further comprises a second section located between the first section and the near end, and an accommodating cavity communicated with the installation cavity is formed in the second section.

4. A balloon pressure pump as in claim 3, wherein: the balloon pressure pump further comprises a pressure detection display assembly, wherein the pressure detection display assembly is arranged on the second section and at least partially positioned in the accommodating cavity.

5. The balloon pressure pump of claim 4, wherein: the pressure detection display component comprises a pressure gauge, an oil cylinder and a connecting piece, the oil cylinder and the connecting piece are both positioned in the accommodating cavity, the pressure gauge comprises a gauge head and a joint, the oil cylinder comprises a cylinder body and a push rod, an oil storage cavity in which liquid oil is stored is arranged in the cylinder body, the gauge head is exposed outside the second section and can display and read a pressure value, one end of the joint is connected with the gauge head, the other end of the joint is connected with the cylinder body, one end of the push rod extends into the oil storage cavity, the other end of the push rod is connected with the operating rod through the connecting piece, the operating rod drives the cylinder body to move, the piston rod of the injector is driven by the cylinder body, and meanwhile, under the reaction force of the piston rod of the injector, the operating rod drives the push rod to compress the space of the oil storage cavity, the pressure gauge is used for detecting and displaying the pressure value in the oil storage cavity.

6. A balloon pressure pump as in claim 5, wherein: the cylinder body is characterized in that a first guide groove is formed in the side wall of the cylinder body along the axial direction of the cylinder body, a guide protrusion is arranged on the cavity wall of the accommodating cavity corresponding to the first guide groove, or a guide protrusion is arranged on the side wall of the cylinder body along the axial direction of the cylinder body, a first guide groove is formed in the cavity wall of the accommodating cavity corresponding to the guide protrusion, the first guide groove is matched with the guide protrusion to guide the movement of the cylinder body, a second guide groove is correspondingly formed in the side wall of the second section along the axial direction of the second section, and the joint penetrates through the second guide groove and then extends into the accommodating cavity to be connected with the cylinder body.

7. The balloon pressure pump of claim 4, wherein: the pressure detection display assembly comprises a sliding sleeve, a gland, a connecting piece, an indicating block and a third elastic piece, the sliding sleeve is accommodated in the accommodating cavity in a sliding mode, an opening is formed in the upper end of the sliding sleeve, the gland is arranged in the sliding sleeve from the opening of the sliding sleeve in a sliding mode and is arranged in the sliding sleeve in a sliding mode, the connecting piece is used for connecting the operating rod with the gland, a third guide groove is formed in the side wall of the sliding sleeve, the indicating block is located in the third guide groove and is connected with the gland, a window is formed in the second section, the indicating block is exposed through the window, the third elastic piece is arranged in the sliding sleeve and is located between the gland and the bottom wall of the sliding sleeve, the operating rod drives the sliding sleeve to move, the sliding sleeve drives the piston rod of the injector, and meanwhile, under the reactive force of the piston rod of the injector, the action bars drives the gland compression third elastic component, just the gland drives the instruction block removes, be provided with the pressure value scale table on the second section or on the sliding sleeve, the instruction block is used for instructing pressure value on the pressure value scale table.

8. The balloon pressure pump of claim 7, wherein: the elastic coefficient of the third elastic part is 2.5-10N/mm.

9. A balloon pressure pump as in claim 3, wherein: the balloon pressure pump further comprises a switching assembly at least partially mounted within the receiving cavity, the operating rod passing through the switching assembly, the switching assembly causing the operating rod to switch between a push-pull type and a rotary type.

10. A balloon pressure pump as in claim 9, wherein: the switching assembly comprises two matching blocks, a second elastic piece and a clamping piece, the two matching blocks are arranged oppositely, matching grooves with threads are formed in the inner surfaces of the matching blocks, the second elastic piece is arranged between the two matching blocks, the clamping piece is arranged on the outer surfaces of the matching blocks in a sliding mode, the operating rod comprises a rod part with threads, the rod part penetrates through the two matching blocks, when the clamping piece slides to the clamping piece to overcome the elastic force of the second elastic piece to clamp the two matching blocks, the matching grooves are matched to form a matching hole with threads, the hole wall of the matching hole clamps the rod part, the threads of the rod part are matched with the threads of the matching hole, and the operating rod is switched to a rotating mode; when the clamping piece is slid to release the clamping action on the two matching blocks, the two matching blocks are separated from each other under the action of the elastic force of the second elastic piece, so that the clamping action of the hole wall of the matching hole on the rod part is released, and the operating rod is switched to a push-pull mode.

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