JP2015181562A - pressure device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure device excellent in convenience capable of easily confirming that a target pressure is reached by a hand sensation without impairing operability.SOLUTION: A pressure device 10 includes: a cylindrical body 20 having an accommodation part 21 which is filled with a pressurization medium and a discharge port 23 disposed on the tip side of the accommodation part; a pressurization part 30 configured so as to reciprocate in the accommodation part of the cylindrical body for pumping the pressurization medium through the discharge port in conjunction with the forward movement; a pusher 50 for operating the reciprocating movement of the pressurization part; a storage part 60 coupled in fluid communication with the storage part through a communication port 70 formed at a predetermined position between a tip part 22a and a base end part 22b of the accommodation part 21; and a communication switching part 80 for switching between the communication and the non-communication between the accommodation part and the storage part according to a change in the internal pressure of the accommodation part accompanying the reciprocating movement of the pressurization part.

Description

  The present invention relates to a pressurizing device used in the medical field.

  In the medical field, a technique for treating a stenosis part formed in a body cavity of a living body using an expander such as a balloon is generally performed. The expansion tool is expanded by, for example, sending a pressurized medium composed of various fluids or the like to the expansion tool using a pressurization device called an indeflator.

  A general pressurizing device is provided with a pressure gauge capable of confirming an expansion pressure (pressurization amount) by visual observation. Therefore, by checking the pressure gauge during the procedure, it is possible to relatively easily check to what extent the expansion tool is pressurized (expanded). However, since it is necessary to check the pressure gauge one by one until the set target pressure is reached, there is a problem that it takes time to operate and it is difficult to proceed with the procedure quickly.

  On the other hand, as described in Patent Document 1 below, an attempt has been made to provide a pressurizing apparatus that can easily perform pressure feeding of a pressurizing medium at a target pressure. This pressurizing device is configured to switch the supply of the pressurizing medium to the expander and its restriction in accordance with the amount of movement of the plunger that reciprocates in the syringe filled with the pressurizing medium. Specifically, when the plunger moves forward within the syringe by a predetermined distance and the expansion pressure in the expansion device reaches the target pressure, the valve body provided in the syringe operates and the flow path leads to the expansion device And the subsequent supply of the pressurized medium is restricted. Therefore, the user (technician) can reach the target pressure only by performing an operation of moving the plunger forward and pushing it out. Further, in this pressurizing device, the plunger is moved forward as it is after the flow path is closed by the valve body, and is then abutted against the valve body. For this reason, it can be confirmed that the target pressure has been reached by grasping the forward movement of the plunger with a sense of hand.

Special table 2012-517860 gazette

  However, in the pressurizing device, the valve body is applied with a biasing force acting in the direction opposite to the forward movement direction of the plunger so that the closing operation of the valve body is driven in conjunction with the movement amount of the plunger. Has been. For this reason, the plunger must be moved forward against the urging force, and it is difficult to easily operate the plunger. In particular, it is necessary to move the plunger further forward after reaching the target pressure in order to grasp that the target pressure has been reached, so the plunger moves forward depending on the set value of the target pressure. The work load to be made becomes enormous, and the operability is significantly impaired.

  The present invention has been made in view of the above problems, and provides a highly convenient pressure device that can easily confirm that the target pressure has been reached with a sense of hand without impairing operability. The purpose is to provide.

  A pressurizing device according to the present invention is capable of reciprocating within a housing portion that is filled with a pressurizing medium, a cylindrical body that includes a discharge port provided on a distal end side of the housing portion, and the housing portion of the cylindrical body. A pressurizing unit configured to pump the pressurizing medium through the discharge port as it moves forward; a pusher for operating reciprocating movement of the pressurizing unit; and a distal end and a base end of the accommodating unit The storage unit that is in fluid communication with the storage unit through a communication port formed at a predetermined position between the storage unit and the storage unit according to a change in internal pressure of the storage unit that accompanies the reciprocation of the pressurization unit. And a communication switching unit that switches between communication and non-communication between the storage unit and the communication switching unit before the pressurization unit moved forward reaches the tip of the storage unit and the storage When the internal pressure of the section reaches a predetermined pressure, the storage section and the storage section are communicated with each other. To.

  According to the pressurizing device according to the present invention, when the pressurizing part moves forward and the internal pressure of the accommodating part reaches a predetermined pressure, the inflow of the pressurized medium from the accommodating part to the storing part is started. Then, the user grasps the change in the operational feeling of the pressurization unit before and after the inflow of the pressurization medium into the storage unit through the pusher, so that the pressurization medium is pumped at the target pressure. Can be easily confirmed. After reaching the target pressure, the pushing force required to move the pressurizing unit forward is smaller than before reaching the target pressure, so that the pressurizing unit can be operated smoothly. Become. Therefore, it is possible to provide a highly convenient pressurizing device that can easily confirm that the target pressure has been reached with a sense of hand without impairing operability.

  In addition, when the communication switching unit is configured to have a valve that allows the storage unit and the storage unit to communicate with each other when the internal pressure of the storage unit reaches the specified pressure, the storage unit and the storage unit are configured with a simple configuration valve. Since the communication-no-communication is switched, the apparatus configuration can be prevented from becoming large, and the manufacturing cost can be reduced.

  In addition, the communication port includes a first communication port and a second communication port formed on the tip side of the first communication port, and the communication switching unit is disposed in the first communication port. A first switching portion that communicates between the storage portion and the storage portion when the internal pressure of the storage chamber reaches a predetermined first specified pressure, and the internal pressure of the storage portion that is disposed at the second communication port has a predetermined second specification. When it is configured to include a second switching unit that allows the storage unit and the storage unit to communicate with each other when the pressure is reached, the first specified pressure has been reached in the operation of moving the pressurizing unit forward, and It is possible to easily grasp that the second specified pressure has been reached with a sense of hand. For this reason, the pressurization apparatus excellent in the convenience which can confirm easily that each target pressure was reached | attained by simple operation which only moves a pressurization part forward can be provided.

  Further, when the second specified pressure is set to be larger than the first specified pressure, the first pressure located on the proximal end side increases as the internal pressure of the housing portion increases due to the forward movement of the pressurizing portion. Since the second communication port located on the tip side from the communication port can be communicated in order, it can be easily confirmed with a sense of hand that the internal pressure of the housing portion increases stepwise.

  The accommodating portion includes a first accommodating area, and a second accommodating area that is located on the distal end side of the first accommodating area and has a smaller cross-sectional area than the first accommodating area, and is pressurized The first pressurizing unit that is reciprocated in the first accommodating region, and the first pressurizing unit that is reciprocated integrally with the first pressurizing region in the first accommodating region. And a second pressurizing unit that is reciprocated separately from the pressurizing unit, and the pressurizing device includes a first pressurizing unit and a second pressurizing unit as the pressurizing unit reciprocates. A connection switching unit that switches between connection and separation of the first pressurizing unit and the second pressurizing unit are moved in the first accommodating region. Since the pressurizing medium is pumped, the pressurizing operation is performed quickly, and a relatively small amount of pressurization is performed while the second pressurizing unit is moved in the second accommodating area. Body burden of operation pushing force required for pressing action industry is suppressed to be pumped is reduced.

  In addition, the connection switching unit locks the second pressurizing unit to the first pressurizing unit and connects the first pressurizing unit and the second pressurizing unit, and the pressurizing unit A first abutting portion that separates the second pressurizing portion from the first pressurizing portion by being abutted against the engaging portion with the forward movement, and a latch according to the backward movement of the second pressurizing portion. And a second abutting part that locks the second pressurizing part on the first pressurizing part by being abutted against the part, the connection and separation of each pressurizing part is performed. Since the mechanism for switching is configured with a relatively simple structure, an increase in manufacturing cost due to the provision of the connection switching unit can be suppressed, and the apparatus configuration can be prevented from becoming complicated. In addition, the pressurization unit continues to move forward, and it is easily confirmed that the pressure has been switched to the next target pressure while achieving the pressurization at the target pressure due to the change in response that makes contact with the connection switching unit and shifts to the switching operation. I can do it.

  Moreover, when the said pressurization apparatus further has the adjustment part which can adjust the threshold pressure at the time of a communication switching part starting the operation | movement which connects an accommodating part and a storage part, according to the use application of the said pressurization apparatus Therefore, the target pressure can be changed as appropriate, so that the apparatus has excellent versatility.

  In addition, the pressurizing device is disposed in the auxiliary communication port that communicates the storage unit and the storage unit, and the internal pressure of the storage unit becomes smaller than the internal pressure of the storage unit with the backward movement of the pressurization unit disposed in the auxiliary communication port. In the case of having an auxiliary switching unit that allows the storage unit and the storage unit to communicate with each other, the pressurization medium stored in the storage unit is returned to the storage unit by moving the pressurization unit backward. Therefore, by repeatedly performing the reciprocating motion of the pressurizing unit, it is possible to repeatedly perform the pressurizing operation with an appropriate target pressure.

  Moreover, when the said pressurization apparatus further has the auxiliary | assistant adjustment part which can adjust the threshold pressure at the time of an auxiliary switching part starting the operation | movement which connects an accommodating part and a storage part, the pressurization stored by the storage part Since the timing at which the medium is returned to the storage unit can be changed as appropriate, the apparatus is further improved in convenience.

1 is an overview perspective view of a medical device according to an embodiment of the present invention. It is a side view of the pressurization device concerning an embodiment. It is a perspective sectional view of a pressurizing device concerning an embodiment. It is sectional drawing which expands and shows the front-end | tip part of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is sectional drawing for demonstrating the operation example of the pressurization apparatus which concerns on embodiment. It is an expanded sectional view for demonstrating operation | movement of the connection switching part when a pressurization part moves forward. It is an expanded sectional view for demonstrating operation | movement of the connection switching part when a pressurization part moves backward. It is an expanded sectional view which shows the modification of a connection switching part, and another modification. It is sectional drawing which shows the whole structure of the pressurization apparatus which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the dimension ratio of drawing is exaggerated on account of description, and may differ from an actual ratio.

  1 to 4 are diagrams for explaining the configuration of the pressurizing apparatus according to the embodiment, and FIGS. 5 to 13 are diagrams for explaining the operation of the pressurizing apparatus according to the embodiment.

  The pressurizing apparatus 10 according to the present embodiment is configured to be used for expanding and contracting a medical device such as a balloon used for expanding a stenosis formed in a living organ such as a body cavity of a living body. Has been. As shown in FIG. 1, a medical device 300 is configured by combining a pressurizing device 10 and a predetermined balloon 200.

  Referring to FIGS. 1, 3, and 4, a pressurizing device 10 includes a storage portion 21 that is filled with a pressurizing medium (not shown), and a cylinder that includes a discharge port 23 provided on the distal end side of the storage portion 21. The body 20 and the accommodating portion 21 of the cylindrical body 20 are configured to reciprocate, and a pressurizing unit 30 that pumps the pressurizing medium through the discharge port 23 in accordance with the forward movement, and a reciprocating motion of the pressurizing unit 30. A pusher 50 for operation, and a reservoir 60 that is in fluid communication with the accommodating portion 21 via a communication port 70 formed at a predetermined position between the distal end portion 22a and the proximal end portion 22b of the accommodating portion 21. And a communication switching unit 80 that switches between communication and non-communication of the storage unit 21 and the storage unit 60 according to a change in the internal pressure of the storage unit 21 accompanying the reciprocation of the pressurizing unit 30. The communication switching unit 80 is configured so that the storage unit 21 and the storage unit are in contact with the storage unit 21 when the forwardly moved pressure unit 30 reaches the tip of the storage unit 21 and the internal pressure of the storage unit 21 reaches a predetermined pressure. It operates to communicate with 60.

  As shown in FIGS. 1 and 3, when the pressurizing device 10 operates the pusher 50 to move the pressurizing unit 30 forward, the pressurizing device 10 discharges the pressurizing medium filled in the housing unit 21 of the cylindrical body 20. The balloon 200 is discharged from the nozzle 23 and connected to the discharge port 23 via the tube 210 in a liquid-tight and air-tight manner, and the balloon 200 is configured to be expanded and deformed by a predetermined target pressure. In addition, as will be described later, the pressurizing device 10 allows the user to easily grasp the pressurization with the target pressure with his / her hand while the pusher 50 is moved forward. It is configured to be able to.

  In the description of the specification, the extending direction of the cylindrical body 20 is defined as the axial direction. In the pressurizing device 10, the side where the discharge port 23 is provided is the distal end side, and the side where the pusher 50 is provided is the proximal end side. Further, the movement of the pressurizing unit 30 toward the distal end side is referred to as a forward movement, and the movement of the pressurizing unit 30 toward the proximal end side is referred to as a backward movement.

  Hereinafter, the configuration of each part of the pressure device 10 will be described.

  As shown in FIGS. 1 to 4, the cylindrical body 20 is configured as a container in which a space having a predetermined volume forming the housing portion 21 is formed. The outer shape of the cylindrical body 20 is formed in a substantially cylindrical shape. A flange portion 26 is provided on the outer periphery of the proximal end portion of the cylindrical body 20 to which the pusher 50 is abutted when the pressurizing portion 30 is pushed down (see FIG. 10).

  As shown in FIG. 3, the cylindrical body 20 is configured such that the cross-sectional area of the accommodating portion 21 is different between the proximal end portion and the distal end portion. A first accommodation region 21 a in which the cross-sectional area of the accommodation portion 21 is larger than that of the distal end portion is formed at the proximal end portion of the cylindrical body 20. A second storage area 21b in which the cross-sectional area of the storage section 21 is smaller than that of the first storage area 21a is formed at the tip of the cylindrical body 20.

  A seal region 21c that forms a seal portion 39 is formed in the first storage region 21a of the storage portion 21 with a seal member 32 described later (see FIG. 6). The seal area 21c is formed to have a smaller cross-sectional area than other portions of the first accommodation area 21a. When the pressurizing unit 30 passes through the seal region 21c, the pressurizing medium is pushed out toward the tip side. In addition, a narrow portion 25 is formed on the inner surface of the cylindrical body 29 to narrow the cross-sectional area of the portion corresponding to the first seal region 21c. The proximal end face of the narrow portion 25 has a function as a first abutting portion 41 that constitutes a part of the connection switching portion 40 described later (see FIG. 14).

The volume of the accommodating portion 21 of the cylindrical body 20 can be appropriately determined according to the volume of the medical instrument (balloon or the like) to be pressurized, the contents of the procedure, and the like, and is not particularly limited. The volume may be 15 to 30 cm ³ , the volume of the first storage region 21 a of the storage unit 21 may be 10 to 15 cm ³ , and the volume of the second storage region 21 b of the storage unit 21 may be 5 to 10 cm ³ .

  The material of the material constituting the cylindrical body 20 is not particularly limited as long as it is configured to be able to hold a predetermined pressurizing medium in the accommodating portion 21. For example, PMMA (polymethyl methacrylate), PC (polycarbonate), It can be composed of a resin material such as an ultraviolet curable resin, glass, ceramics, various metal materials, and the like. For example, the cylindrical body 10 can be configured to be transparent or translucent so that the inside of the housing portion 21 can be confirmed from the outside.

Although the kind of pressurization medium accommodated in the accommodating part 21 of the cylinder 20 is not specifically limited, When pressurization apparatus 10 is used for expansion of the balloon 200, fluids, such as gas and a liquid, are used. Examples include gases such as helium gas, CO ₂ gas, and O ₂ gas, and liquids such as physiological saline and contrast medium.

  As shown in FIG. 3, the discharge port 23 is formed so that the opening 23 a on the distal end side faces the outside, and the opening 23 b on the proximal end side has a through hole 24 that communicates with the accommodating portion 21. The pressurized medium pumped from the accommodating portion 21 side is supplied to the outside of the cylindrical body 20 through the through hole 24.

  As shown in FIG. 3, the pressure unit 30 includes a first pressure unit 31 and a second pressure unit 35.

  The first pressurizing unit 31 includes a seal member 32 provided at the distal end portion, and a main body portion 33 to which the seal member 32 is attached.

  An insertion space 33 a into which the second pressure unit 35 is inserted is formed inside the main body 33. The insertion space 33a is configured by a through hole that penetrates the main body 33 in the axial direction. As shown in FIG. 14A, the first pressurizing portion 35 has a holding hole 46 for holding a locking portion 40a constituting a part of a connection switching portion 40 described later in a swingable state. Is provided.

  The second pressurizing part 35 has a seal member 36 provided at the tip part and a main body part 37 to which the seal member 36 is attached. A pusher 50 is connected to the base end portion of the main body portion 37. Further, as shown in FIG. 15A, the second pressurizing unit 35 includes a second abutting unit 45 constituting a part of the connection switching unit 40 and a part of the connection switching unit 40. The groove part 42 in which the latching | locking part 40a to perform is arrange | positioned is provided.

  As shown in FIG. 3, when the pressure medium is pumped by the pressure device 10, the first pressure unit 31 and the second pressure unit 35 are assembled to each other (integrated state). Prepared at. As will be described later, in the first accommodating region 21a of the accommodating portion 21, the first pressurizing portion 31 and the second pressurizing portion 35 move in an integrated state, and the second accommodating portion 21 accommodates the second accommodating portion. In the region 21b, the second pressure unit 35 is separated from the first pressure unit 31, and only the second pressure unit 35 moves.

  In the second pressurizing unit 35, the front end surface of the seal member 36 provided in the second pressurizing unit 35 is in the axial direction with the front end surface of the seal member 32 provided in the first pressurizing unit 31. It is inserted and arranged in the insertion space 33a formed in the first pressurizing part 31 so as to match. When the second pressure member 35 is inserted into the insertion space 33a, the first pressure member 31 and the second pressure member 35 are arranged coaxially.

  When the pusher 50 is operated in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are integrated, the first pressurizing unit 31 and the second pressurizing unit 35 are inadvertently arranged. The inner diameter of the insertion space 33a of the first pressurizing unit 31 and the outer diameter of the second pressurizing unit 35 are set so as not to be separated. Specifically, the outer diameter of the second pressurizing part 35 is formed with a dimension substantially the same as or larger than the inner diameter of the insertion space 33 a of the first pressurizing part 31. By setting the dimensions in this way, the outer peripheral surface of the second pressure member 35 can be pressed against the inner peripheral surface of the insertion space 33a of the first pressure member 31. It is possible to prevent the second pressurizing unit 35 from being separated from the first pressurizing unit 31 only by the force acting upon the operation.

  The seal member 32 of the first pressurizing unit 31 and the seal member 36 of the second pressurizing unit 35 are a seal unit 39 that seals between the tip of the pressurizing unit 30 and the inner peripheral surface of the cylindrical body 20. Form. As shown in FIG. 6, since the seal portion 39 is formed by the seal member 32 while the pressurizing portion 30 moves in the seal region 21 c of the first accommodating region 21 a, the seal portion 39 is formed closer to the proximal end side than the seal portion 39. It is possible to prevent the pressurized medium from flowing. Further, as shown in FIG. 8, while the second pressurizing part 35 moves in the second accommodating region 21 b, the seal part 39 is formed by the seal member 36, so that the base end side is closer to the seal part 39. It is possible to prevent the pressurized medium from flowing into. Therefore, while the first pressurizing part 31 and the second pressurizing part 35 are integrally moved in the first accommodating area 21a, the volume corresponding to the cross-sectional area of the first accommodating area 21a is increased. While the pressurizing medium is being pumped and the second pressurizing unit 35 is moving in the second accommodating area 21b, the pressurized medium having a volume corresponding to the cross-sectional area of the second accommodating area 21b is pumped. .

  The connection switching unit 40 provided in the pressurizing device 10 switches connection-separation between the first pressurizing unit 31 and the second pressurizing unit 35 as the pressurizing unit 10 reciprocates.

  As shown in FIGS. 3, 14, and 15, the connection switching unit 40 engages the first pressurization unit 31 with the first pressurization unit 31 by engaging the second pressurization unit 35 with the first pressurization unit 31. The first pressurizing unit 31 to the second pressurizing unit 35 are abutted against the engaging unit 40a connecting the pressurizing unit 35 and the engaging unit 40a as the pressurizing unit 30 moves forward. The first abutting portion 41 to be separated (see FIG. 14B) and abutting against the locking portion 40a as the second pressurizing portion 35 moves backward, thereby causing the first pressurizing portion 31 to be abutted. And a second butting portion 45 for locking the second pressurizing portion 35 (see FIG. 15B).

  The configuration of the connection switching unit 40 will be described with reference to FIGS. 14 and 15.

  As shown in FIG. 14A, the locking portion 40a included in the connection switching portion 40 includes a front end surface 40b and a rear end surface 40c that extend in a direction orthogonal to the axial direction of the cylindrical body 20, and a rear end surface from the front end surface 40b. It has a cross-sectional shape in which a pair of inclined surfaces 40d and inclined surfaces 40e connected to 40c are formed. The inclined surface 40d is inclined in a direction (downward in the drawing) from the outside to the inside of the second pressure member 35, and the inclined surface 40e is directed from the inside to the outside of the second pressure member 35. It is inclined in the direction (upward direction in the figure).

  As shown in FIG. 14A, the groove portion 42 formed in the second pressurizing portion 35 has a front end surface 42b extending in a direction orthogonal to the axial direction of the cylindrical body 20 and substantially the axial direction of the cylindrical body 20. It has a cross-sectional shape in which a bottom surface 42c extending in parallel and an inclined surface 42d extending substantially parallel to the inclined surface 40e of the locking portion 40a are formed. The front end surface 42 b of the groove portion 42 has a function as the second butting portion 45.

  The locking portion 40a is formed with a through hole (not shown) that penetrates the locking portion 40a in the axial direction. By inserting a part of the first pressurizing part 31 into the through hole, the locking part 40a can swing in the direction intersecting the axial direction (vertical direction). 31 is assembled.

  FIG. 14 shows a state where the first pressurizing unit 31 and the second pressurizing unit 35 are shifted from the connected state to the separated state.

  As shown in FIG. 14A, the pressurizing unit 30 is moved forward by a predetermined distance in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are connected via the locking unit 40a. If it does, the front end surface 40b of the latching | locking part 40a will be abutted by the 1st abutting part 41. FIG. Further, the inclined surface 40e of the locking portion 40a is brought into contact with the inclined surface 42d of the groove portion 42.

  As shown in FIG. 14B, when the pressurizing part 30 is further moved forward, the locking part 40a slides upward along the inclined surface 42d of the groove part 42 in the figure. As a result, as shown in FIG. 14C, the locking portion 40a comes out from the groove portion 42, and the first pressurizing portion 31 and the second pressurizing portion 35 via the locking portion 40a. The connection is released. Thus, when the pressurizing unit 30 is moved forward by a predetermined distance, the first pressurizing unit 31 and the second pressurizing unit 35 are separated along with the forward movement.

  FIG. 15 shows a state where the first pressurizing unit 31 and the second pressurizing unit 35 are shifted from the separated state to the connected state.

  As shown in FIGS. 15 (A) and 15 (B), the second pressurizing unit 35 is moved by a predetermined distance in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are separated. When moved backward, the front end surface 42b (second abutting portion 45) of the groove portion 42 formed in the second pressurizing portion 35 is abutted against the front end surface 40b of the locking portion 40a and is engaged with the groove portion 42. It will be in the state where stop part 40a was caught.

  As shown in FIG. 15C, when the second pressure member 35 is moved backward with the locking portion 40a hooked in the groove portion 42, the first pressure member 31 and the first pressure member 31 are connected via the locking portion 40a. The entire pressurizing unit 30 moves in a state where the second pressurizing unit 35 is connected. As described above, when the second pressure unit 35 is moved backward by a predetermined distance, the first pressure unit 31 and the second pressure unit 35 are connected with the backward movement. As shown in the figure, a guide surface 41a extending substantially parallel to the inclined surface 40d of the locking portion 40a can be formed on the inner surface of the cylindrical body 20. The guide surface 41a guides the swinging (moving in the vertical direction) of the locking portion 40a when the first pressurizing unit 31 and the second pressurizing unit 35 are separated and connected, thereby smoothly separating the guide surface 41a. It is provided to enable connection work.

  As shown in FIG. 3, the pusher 50 includes a rod-shaped main body 51 extending from the base end portion of the second pressurizing portion 35 and a push-in portion 52 provided at the base end portion of the main body portion 51. Have.

  A user who uses the pressurizing device 10 can move the pressurizing unit 30 forward by performing an operation of pushing the pushing unit 52 toward the distal end side. Moreover, the pressurizing part 30 can be moved backward by performing an operation of pulling the pushing part 52 toward the base end side. In order to facilitate the operation of pushing the pushing portion 52 toward the distal end side and the operation of pulling the pushing portion 52 toward the proximal end side, the pushing portion 52 is formed in a flange shape extending in the surface direction.

  The material of the main body 33 of the first pressurizing unit 31, the main body 37 of the second pressurizing unit 35, and the material constituting the pusher 50 is not particularly limited. The thing similar to what was illustrated can be used.

  The material of the material which comprises the sealing member 32 provided in the 1st pressurization part 31, and the seal member 36 provided in the 2nd pressurization part 35 is not specifically limited, For example, natural rubber, butyl rubber, isoprene Various rubber materials such as rubber, butadiene rubber, styrene-butadiene rubber, silicone rubber, various thermoplastic elastomers such as polyurethane, polyester, polyamide, olefin, and styrene, or elastic materials such as mixtures thereof Can be used.

As shown in FIG. 4, the storage unit 60 has a predetermined space 61 in which a pressurized medium can be accommodated, and communicates with the interior of the accommodation unit 21 through a plurality of communication ports 71 and 75. When the internal pressure of the accommodating portion 21 changes, the communication ports 71 and 75 are switched between communication and non-communication with the accommodating portion 21 by the communication switching portion 80 that operates according to the internal pressure. In addition, the volume of the space 61 of the storage part 60 can be suitably determined according to the relationship with the volume of the cylindrical body 20 and the like, and is not particularly limited, but may be 5 to 15 cm ³ , for example.

  The communication port 70 includes a first communication port 71 and a second communication port 75 formed on the tip side of the first communication port 71. In the pressure device 100, the first communication port 71 is formed at a position communicating with the first storage region 21 a of the storage unit 21, and the second communication port 75 is the second communication port 75 of the storage unit 21. It is formed at a position communicating with the storage area 21b.

  The communication switching unit 80 includes a first valve 81 (corresponding to the first switching unit) disposed in the first communication port 71 and a second valve 85 (second assembly) disposed in the second communication port 75. 2). The first valve 81 operates to allow the storage unit 60 and the storage unit 21 to communicate with each other when the internal pressure of the storage unit 21 reaches a predetermined first specified pressure P1. The second valve 85 operates so as to allow the storage unit 21 and the storage unit 60 to communicate with each other when the internal pressure of the storage unit 21 reaches a second specified pressure P2 that is greater than the first specified pressure P1.

  As shown in FIG. 6, when the pressurizing unit 30 moves forward by a predetermined distance and the internal pressure of the accommodating unit 21 reaches the first specified pressure P1, the first valve 81 is opened. Until the first valve 81 is opened, a pressurized medium having a volume corresponding to the amount of movement of the pressurizing unit 30 is supplied to the balloon 200 through the discharge port 23. On the other hand, after the first valve 81 is opened, the pressurizing medium flows into the storage unit 60 through the first communication port 71 while the pressurizing unit 30 moves in the first accommodating region 21a (see FIG. (Indicated by the middle arrow t), no pressurized medium is supplied to the balloon 200. The user recognizes that the feeling of the hand pressing the pusher 50 before and after the first communication port 71 communicates changes (becomes lighter), so that the internal pressure of the housing portion 23 becomes the first specified pressure P1. It is possible to confirm that the balloon 200 has been pressurized by a predetermined amount of pressure.

  Further, as shown in FIG. 9, when the second pressurizing part 35 moves forward in the second accommodating region 21b by a predetermined distance and the internal pressure of the accommodating part 21 reaches the second specified pressure P2, 2 valve 85 opens. Similarly to the case where the first valve 81 is opened, after the second valve 85 is opened, while the second pressurizing unit 35 moves in the second accommodating region 21b, the pressurizing medium is the second medium. Therefore, the pressurized medium is not supplied to the balloon 200. The user recognizes that the sense of hand pressing the pusher 50 changes (becomes lighter), so that the inside of the housing portion 23 (second housing region 21b) has reached the second specified pressure P2. Can be confirmed.

  As described above, by setting the first specified pressure P1 and the second specified pressure P2 to different pressures, the first specified pressure P1 has been reached, and the second specified pressure P2 has been reached. Can be easily recognized based on the change in the operation feeling transmitted from the pusher 50, so that a plurality of target pressures can be set, and pressurization is performed in multiple stages according to each target pressure. It becomes possible to do. Each of the specified pressures P1 and P2 can be appropriately changed according to the target disease, the content of the procedure, etc. For example, the first specified pressure P1 is 8 atm, and the second specified pressure P2 is 12 atm. It is possible to set.

  As shown in FIG. 4, the first valve 81 has a valve body 81a that opens and closes the first communication port 71, and a biasing member 81b that applies a biasing force toward the accommodating portion 21 to the valve body 81a. doing.

  Until the internal pressure of the accommodating portion 21 reaches the first specified pressure P1, the valve body 81a is arranged in a state of being pressed against the first communication port 71 by the urging force applied to the valve body 81a. Close the communication port 71. When the internal pressure of the housing portion 21 reaches the first specified pressure P1, the valve body 81a is retracted from the first communication port 71 against the urging force, and the first communication port 71 is opened. When a pressurizing medium is supplied from the pressurizing device 10 to the balloon 200 and the pressurizing unit 30 is further moved forward in a state where the internal pressure of the balloon 200 and the internal pressure of the containing unit 21 are balanced by the first specified pressure P1, The pressurizing medium is sent to the storage unit 60 by pressurization accompanying the movement of.

  As shown in FIG. 4, the second valve 85 includes a valve body 85 a that opens and closes the second communication port 75, and a biasing force in a direction toward the accommodating portion 21 toward the valve body 85 a (a direction orthogonal to the axial direction). And an urging member 85b.

  The valve body 85a is pressed against the second communication port 75 by the biasing force applied to the valve body 85a until the internal pressure of the second storage area 21b of the storage portion 21 reaches the second specified pressure P2. And the second communication port 75 is closed. When the internal pressure of the second storage area 21b of the storage part 21 reaches the second specified pressure P2, the valve body 85a is retracted from the second communication port 75 against the urging force, and the second communication port 75 is opened. open. Accordingly, the pressurizing medium is supplied from the pressurizing device 10 to the balloon 200, and the second pressure is maintained in a state where the internal pressure of the balloon 200 and the internal pressure of the second accommodating region 21b of the accommodating portion 21 are balanced by the second specified pressure P2. When the pressurization unit 35 is further moved forward, the pressurization medium is sent to the storage unit 60 by the pressurization accompanying the subsequent movement.

  As illustrated in FIG. 4, the valve body 81 a included in the first valve 81 has a trapezoidal cross-sectional shape with a cross-sectional area that decreases toward the housing portion 21. Moreover, the 1st communicating port 71 is formed in the cross-sectional shape substantially the same as the valve body 81a. Since the cross-sectional shape of the valve body 81a and the first communication port 71 is formed in such a trapezoidal shape, when the valve body 81a opens and closes the first communication port 71, the inner peripheral surface of the first communication port 71 The valve body 81a is smoothly moved along Further, since the valve body 81a is fitted into the first communication port 71 when the valve body 81a is urged by the urging member 81b, the valve body 81a protrudes from the first communication port 71 toward the accommodating portion 21 side. Can be prevented. Similarly, the cross-sectional shapes of the valve body 85a and the second communication port 75 provided in the second valve 85 are also formed in a trapezoidal shape.

  The material constituting each of the urging members 81b and 85b is not particularly limited as long as the urging force in the direction toward the accommodating portion 21 can be applied to the valve bodies 81a and 85a. For example, as illustrated in FIG. A known spring member can be used. In addition to the spring member, for example, a leaf spring or an elastic member that imparts an elastic force may be used.

  Although the material which comprises each valve body 81a and 85a is not specifically limited, For example, the thing similar to what was illustrated as a constituent material of the sealing members 32 and 36 mentioned above can be used.

  As shown in FIG. 4, the pressurizing device 10 includes a first adjustment unit 91 that can adjust a threshold pressure when the first valve 81 operates, and a threshold pressure when the second valve 85 operates. And a second adjustment unit 95 capable of adjusting the above.

  The first adjustment portion 91 is configured by an adjustment screw member that is disposed so as to penetrate inside and outside of the storage portion 60. Although illustration is omitted, a screw hole is formed in the wall portion of the storage portion 60 where the first adjustment portion 91 is disposed. In order to prevent the pressurized medium from flowing out of the screw hole, the screw hole and the first adjusting portion 91 are provided with a known seal tape or the like.

  An urging member 81 b is fixed to one end 91 a of the first adjustment unit 91. The urging member 81b is fixed to the valve body 81a.

  When the first adjusting portion 91 is screwed in, the urging member 81b is compressed, so that a large urging force acts on the valve body 81a. Therefore, the threshold pressure at the time when the valve body 81a starts the operation of communicating the storage unit 21 and the storage unit 60 (the operation of retracting from the first communication port 71) increases. On the other hand, when the screwing of the first adjusting portion 91 is loosened, the amount of compression of the urging member 81b is reduced, so that the urging force acting on the valve body 81a is reduced. Therefore, the threshold pressure when the valve body 81a starts the operation of communicating the storage unit 21 and the storage unit 60 is reduced.

  The second adjustment unit 95 is also configured in the same manner as the first adjustment unit 91, and when the valve body 85a starts to operate by adjusting the compression amount of the urging member 85b included in the second valve 85. It is possible to adjust the threshold pressure. Each adjustment part 91 and 95 can be comprised so that screwing operation can be performed with fingers etc., for example, and can also be comprised so that it can be screwed in using tools, such as a driver.

  As shown in FIG. 4, the pressurizing device 10 is disposed in the auxiliary communication port 110 that communicates the storage unit 21 and the storage unit 60, and the auxiliary communication port 110, so that the second pressurizing unit 35 moves backward. Along with this, there is provided an auxiliary switching unit 120 that communicates between the storage unit 21 and the storage unit 60 when the internal pressure of the storage unit 21 becomes higher than the internal pressure of the storage unit 60.

  The auxiliary communication port 110 and the auxiliary switching unit 120 are provided to return the pressurized medium stored in the storage unit 60 to the storage unit 21 when the second pressurization unit 35 is moved backward.

  The auxiliary communication port 110 is formed at a position communicating with the second accommodation region 21 b of the accommodation unit 21.

  The auxiliary switching unit 120 includes a valve body 120a that opens and closes the auxiliary communication port 110, and a biasing member 120b that applies a biasing force in a direction away from the storage unit 21 (a direction orthogonal to the axial direction) to the valve body 120a. doing.

  The urging member 120b is configured to apply an urging force in a direction opposite to the urging force applied to the valve body 81a of the first valve 81 (the valve body 82a of the second valve 85) to the valve body 120a. ing. In other words, normally, the auxiliary communication port 110 is closed by applying an urging force in a direction in which the valve body 120 a is pulled up toward the storage unit 60, and the internal pressure of the second storage region 21 b of the storage unit 21 is set to the storage unit 60. When the pressure becomes smaller than the internal pressure, the valve body 120a protrudes into the accommodating portion 21 and operates to open the auxiliary communication port 110 (see FIG. 11). By opening the auxiliary communication port 110, the pressurized medium that has flowed into the storage unit 60 when the pressurizing unit 30 is moved forward is returned to the storage unit 21.

  As the constituent material of the valve body 120a included in the auxiliary switching unit 120 and the constituent material of the urging member 120b, the same materials as those of the first valve 81 (second valve 85) of the communication switching unit 80 can be used. In addition, the valve body 120a has a trapezoidal cross-sectional shape with a cross-sectional area that increases toward the housing portion 21, and the auxiliary communication port 110 is formed to have substantially the same cross-sectional shape as the valve body 120a. For this reason, the valve body 120a can be smoothly moved at the auxiliary communication port 110, and further, the valve body 120a can be prevented from protruding from the auxiliary communication port 110 to the storage portion 60 side.

  As shown in FIG. 4, the pressurizing device 10 is provided with an auxiliary adjustment unit 130 that can adjust a threshold pressure when the auxiliary switching unit 120 operates. The auxiliary adjustment unit 130 is configured by a screw member that can be screwed into the storage unit 60, similarly to the first adjustment unit 91 (second adjustment unit 95).

  When the auxiliary adjustment unit 130 is screwed, the urging member 120b is compressed, and the force acting in the direction of pulling up the valve body 120a is weakened. For this reason, it becomes easy to move the valve body 120a in the direction away from the auxiliary communication port 110 easily. That is, the threshold pressure when the valve body 120a starts the operation of communicating the storage unit 21 and the storage unit 60 is reduced. On the other hand, if the screwing of the auxiliary adjustment portion 130 is loosened, the amount of compression of the urging member 120b is reduced, and the urging force acting in the direction of pulling up the valve body 120a is increased. The threshold pressure when starting the operation of communicating with the storage unit 60 increases.

  The other configuration of the auxiliary adjustment unit 130 can be configured in the same manner as the first adjustment unit 91 (second adjustment unit 95), and thus the description thereof is omitted.

  Referring to FIG. 1, as a balloon 200 used with the pressurizing device 10, a balloon used for a balloon catheter or the like known in the medical field can be used. The balloon 200 is configured such that the internal volume increases and expands and deforms when the pressurized medium flows in, and the internal volume decreases and contracts and deforms when the pressurized medium is discharged. The target site for the procedure using the balloon 200 is not particularly limited, and can be applied to living organs such as blood vessels, bile ducts, trachea, esophagus, urethra, ear and nose lumens, and other organs. It can be widely used for the purpose of treatment and improvement.

  Examples of the material constituting the balloon 60 include polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymer, polyesters such as polyethylene terephthalate, polyvinyl chloride, ethylene-vinyl acetate copolymer, and cross-linked ethylene-vinyl acetate copolymer. Coalescence etc. can be used.

  The tube 210 that connects the discharge port 23 of the pressurizing apparatus 10 and the balloon 200 can be configured by a known tube or the like configured so that the pressurizing medium can be circulated, and the material and the like are not particularly limited. In order to prevent the tube 210 from coming off from the discharge port 23, the tube 210 may be fixed to the discharge port 23 by using a predetermined fastener or by adhesion or fusion.

  Next, an operation example of the pressure device 10 will be described.

  First, as shown in FIG. 5, the accommodating portion 21 is filled with a pressurized medium (not shown), and the pusher 50 is disposed at the pushing start position. The pressurizing unit 30 is prepared in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are connected to each other and integrated. In order to prevent the pressurized medium from leaking from the base end portion of the cylindrical body 20 when performing the pressurizing operation, a seal that seals between the cylindrical body 20 and the pressurized section 30 in a liquid-tight and air-tight manner. It is possible to install members and the like as appropriate.

  Next, as shown in FIG. 6, by pressing the pusher 50, the pressurizing unit 30 is moved forward. When the pressurizing unit 30 moves forward by a predetermined distance, the seal member 32 of the first pressurizing unit 31 is brought into pressure contact with the inner surface of the narrow portion 25 provided in the accommodating unit 21 to form the seal unit 39. . As a result, the pressurizing medium filled in the accommodating portion 21 as the pusher 50 moves forward is pumped to the balloon 200 through the discharge port 23.

  The pressurizing unit 30 moves in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are integrated while moving in the first accommodating region 21 a of the accommodating unit 21. Therefore, in the initial stage where the forward movement of the pressurizing unit 30 is started, a relatively large amount of the pressurizing medium can be supplied to the balloon 200 in a short time.

  When the internal pressure of the storage unit 21 and the balloon 200 reaches the first specified pressure P1 as the pressurization unit 30 moves forward, the first valve 81 is opened, and the storage unit 21 and the storage unit 60 are communicated. After the first valve 81 is opened, the operating force required to push in the pressurizing unit 30 is weakened. Therefore, the internal pressures of the accommodating unit 21 and the balloon 200 are first sensed as if they are transmitted through the pusher 50. It is possible to easily grasp that the pressure P1 has been reached. In addition, after the first valve 81 is opened, the pressurized medium is preferentially flowed into the storage unit 60 (the inflow of the pressurized medium) while the pressurizing unit 30 moves in the first accommodating region 21a. Is indicated by an arrow t).

  As shown in FIG. 7, when the pressurizing unit 30 is further moved forward, the locking portion 40 a connecting the first pressurizing unit 31 and the second pressurizing unit 35 strikes the first abutting unit 41. . As described above (see FIG. 14), when the pressurizing unit 30 is further moved forward in a state where the locking portion 40a is abutted against the first abutting portion 41, the first pressurizing unit 31 and the first The connection of the second pressure unit 35 is released.

  In addition, the first valve 81 automatically has the first valve when the flow rate of the pressurized medium flowing into the storage unit 60 increases and the internal pressure of the storage unit 60 balances with the internal pressures of the storage unit 21 and the balloon 200. It operates to close the inflow portion 71.

  As shown in FIG. 8, when the pusher 50 is pushed in, the second pressurizing unit 35 is separated from the first pressurizing unit 31, and only the second pressurizing unit 35 is the second of the accommodating unit 21. It moves in the accommodation area 21b. Since the cross-sectional area of the second storage region 21b of the storage unit 21 is smaller than that of the first storage region 21a, the operation force required to push the pressurizing unit 30 is weakened. Therefore, the user can smoothly move the second pressurizing part 35 forward, and the second pressurizing part 35 moves the second accommodating area 21b with a sense of hand transmitted through the pusher 50. You can recognize that you are moving.

  The seal member 36 included in the second pressurizing unit 35 is in pressure contact with the inner peripheral surface of the cylindrical body 20 to form a seal unit 39. Therefore, the movement of the second pressurizing unit 35 is performed so that the internal pressure of the balloon 200 reaches the second specified pressure P2 while the second pressurizing unit 35 is moving in the second accommodating region 21b. The pressurized medium is pumped from the container 21 side toward the balloon 200 according to the amount.

  As shown in FIG. 9, when the internal pressure of the accommodating part 21 (second accommodating region 21b) and the balloon 200 reaches the second specified pressure P2 as the second pressurizing part 35 moves forward, The valve 85 is opened, and the storage unit 21 and the storage unit 60 are communicated. After the second valve 85 is opened, the operating force required to push in the second pressurizing unit 35 is weakened, so that the internal pressure of the storage unit 21 and the balloon 200 is first sensed at hand transmitted through the pusher 50. It is possible to easily grasp that the specified pressure P2 of 2 has been reached. Further, after the second valve 85 is opened, the pressurizing medium is preferentially flowed into the storage unit 60 (the pressurization) while the second pressurizing unit 35 moves in the second accommodating region 21b. The inflow of the medium is indicated by an arrow t).

  As shown in FIG. 10, when the second pressurizing part 35 reaches the tip of the accommodating part 21 and hits the inner surface of the accommodating part 21, the user presses the second pressurizing part 35 with a sense of hand. It can be confirmed that the leading end 22a of the accommodating portion 21 has been reached.

  With the above procedure, the balloon 200 can be pressurized (expanded) stepwise with a plurality of target pressures such as the first specified pressure P1 and the second specified pressure P2. Depending on the content of the procedure, for example, when the first specified pressure P1 is set to the final target pressure, the first valve 31 is opened and the pressurized medium flows into the storage unit 60. (Refer to FIG. 6). By stopping the operation of moving the pressurizing unit 30 forward, the expansion at the first specified pressure P1 can be suitably performed.

  Next, an operation for sucking the pressurized medium supplied to the balloon 200 (an operation for contracting the balloon 200) will be described.

  As shown in FIG. 10, after the operation of pushing down the second pressurizing unit 35, the second pressurizing unit 35 is moved backward as shown in FIG. Then, a suction pressure acts in the accommodating part 21, and the pressurized medium starts to flow from the balloon 200 side to the accommodating part 21 side. Note that the second valve 85 is automatically closed in accordance with an increase in the suction pressure acting on the accommodating portion 21.

  When the second pressurizing unit 35 moves backward by a predetermined distance and the internal pressure of the second storage region 21b of the storage unit 21 becomes smaller than the internal pressure of the storage unit 60, the valve body 120a is opened and the storage unit 21 is opened. And the storage part 60 are connected. After the valve body 120a is opened, while the second pressurizing unit 35 moves, the pressurizing medium is recirculated from the storage unit 60 to the accommodating unit 21 (returning of the pressurizing medium is indicated by an arrow t). In addition, the valve body 120a is automatically closed when the internal pressure of the storage part 60 becomes smaller than the internal pressure of the storage part 21 by returning the pressurized medium in the storage part 60 to the storage part 21.

  As shown in FIG. 12, when the second pressurizing part 35 is further moved backward, the second abutting part 45 provided in the second pressurizing part 35 abuts against the locking part 40a. As described above (see FIG. 15), when the second pressing portion 35 is further moved backward with the second abutting portion 45 being abutted against the locking portion 40a, the locking portion 40a is interposed. Thus, the first pressurizing unit 31 and the second pressurizing unit 35 are connected, and the pressurizing units 31 and 35 are integrated.

  As shown in FIG. 13, when the pusher 50 is pulled to the proximal end side in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are integrated, the entire pressurizing unit 30 becomes the first part of the housing unit 21. 1 accommodation area 21a is moved. As the pressurizing unit 30 moves backward, the pressurizing medium supplied to the balloon 200 is refluxed into the accommodating unit 21 and the accommodating unit 21 is filled with the pressurized medium. Thus, by returning the pressurizing unit 30 to the initial position, the storage unit 21 returns to the initial state in which the pressurizing medium is filled, and thus it is possible to repeatedly perform the pressurizing operation.

  As described above, according to the pressure device 10 according to the present embodiment, when the pressure unit 30 moves forward and the internal pressure of the storage unit 21 reaches a predetermined pressure, the pressure medium from the storage unit 21 to the storage unit 60 is increased. Inflow begins. Then, the user grasps the change in the operational feeling of the pressurization unit 30 before and after the inflow of the pressurization medium into the storage unit 60 via the pusher 50, so that the pressurization medium is pumped at the target pressure. It is possible to easily confirm that this has been done. In addition to this, after reaching the target pressure, the pushing force required to move the pressurizing unit 30 forward is smaller than before reaching the target pressure, so that the operation of the pressurizing unit 30 is smooth. It becomes possible to do. Therefore, it is possible to provide a pressurizing apparatus 10 that is easy to check and can easily confirm that the target pressure has been reached without losing operability.

  In addition, since the communication switching unit 80 is configured to include the valves 81 and 85 that allow the storage unit 60 and the storage unit 21 to communicate with each other when the internal pressure of the storage unit 21 reaches a specified pressure, the communication switching unit 80 has a simple configuration. Since the connection between the storage unit 60 and the storage unit 21 is switched to the non-communication by the valve, the apparatus configuration can be prevented from becoming large, and the manufacturing cost can be reduced.

  In addition, the communication port 70 includes a first communication port 71 and a second communication port 75 formed on the tip side of the first communication port 71, and the communication switching unit 80 includes the first communication port 71. The first valve 81 and the second communication port 75 are arranged to communicate with the storage unit 60 and the storage unit 21 when the internal pressure of the storage unit 21 reaches a predetermined first specified pressure P1. In the operation of moving the pressurizing unit 30 forward, since the second valve 85 is provided to communicate the storage unit 60 and the accommodating unit 21 when the predetermined second specified pressure P2 is reached. It is possible to easily grasp the arrival at the first specified pressure P1 and the arrival at the second specified pressure P2 with a sense of hand. For this reason, the pressurization apparatus 10 excellent in the convenience which can confirm easily having reached each target pressure by simple operation which only moves the pressurization part 30 forward can be provided.

  In addition, since the second specified pressure P2 is set to be larger than the first specified pressure P1, the internal pressure of the accommodating portion 21 is increased by the forward movement of the pressurizing portion 30, and thus the position on the proximal end side is increased. Since the second communication port 75 located on the distal end side can be communicated in order from the first communication port 71 to be confirmed, it is easily confirmed with a sense of hand that the internal pressure of the accommodating portion 21 increases stepwise. It becomes possible to do.

  In addition, the accommodating portion 21 is a first accommodating area 21a, a second accommodating area 21b that is located on the tip side of the first accommodating area 21a and has a smaller cross-sectional area than the first accommodating area 21a. The pressurizing unit 30 is reciprocated integrally with the first pressurizing unit 31 in the first accommodating region 21a and the first pressurizing unit 31 reciprocated in the first accommodating region 21a. And the second pressurizing part 35 separated and reciprocated from the first pressurizing part 31 in the second accommodating region 21b, and the pressurizing device 10 is adapted to reciprocate the pressurizing part 30. Accordingly, since it is configured to further include a connection switching unit 40 that switches connection-separation between the first pressurization unit 31 and the second pressurization unit 35, the first pressurization is performed in the first accommodation region 21a. While the part 31 and the second pressure part 35 are moved, a relatively large amount of pressure medium is pressurized. Therefore, the pressurizing operation is performed quickly, and a relatively small amount of the pressurizing medium is pumped while the second pressurizing unit 35 is moved in the second accommodating area 21b, so that the pressurizing operation is required. The pushing force is suppressed and the burden required for operation is reduced.

  In addition, the connection switching unit 40 engages the first pressurizing unit 31 with the second pressurizing unit 35 to connect the first pressurizing unit 31 and the second pressurizing unit 35. A first abutting portion 41 that separates the second pressurizing portion 35 from the first pressurizing portion 31 by being abutted against the locking portion 40a as the pressurizing portion 30 moves forward. A second abutting portion 45 that causes the first pressurizing portion 31 to engage the second pressurizing portion 35 by being abutted against the engaging portion 40a as the pressurizing portion 35 moves backward. Since the mechanism for switching the connection and separation of the pressure units 31 and 35 is configured with a relatively simple structure, an increase in manufacturing cost due to the provision of the connection switching unit 40 is suppressed. At the same time, the apparatus configuration can be prevented from becoming complicated. In addition, the pressurizing unit 30 continues to move forward, and the change in response that makes contact with the connection switching unit 40 and shifts to the switching operation makes it easy to achieve the pressurization at the target pressure and switch to the next target pressure. Can be confirmed.

  Moreover, since the said pressurization apparatus 10 further has the adjustment part 90 which can adjust the threshold pressure at the time of the communication switching part 80 starting the operation | movement which connects the accommodating part 21 and the storage part 60, the said pressurization apparatus The target pressure can be changed as appropriate according to the ten usages, and the apparatus has excellent versatility.

  In addition, the pressurizing device 10 is disposed in the auxiliary communication port 110 that communicates the storage unit 21 and the storage unit 60, and the internal pressure of the storage unit 21 is disposed in the auxiliary communication port 110 as the pressurization unit 30 moves backward. Since the auxiliary switching unit 120 that allows the storage unit 21 and the storage unit 60 to communicate with each other when the internal pressure of the storage unit 60 becomes smaller than the internal pressure of the storage unit 60, the storage unit 60 is moved backward by moving the pressurizing unit 30. A pressurization device that can recirculate the stored pressurization medium to the storage unit 21 and can repeatedly perform pressurization with an appropriate target pressure by repeatedly performing reciprocation of the pressurization unit 30. It becomes possible to provide.

  Moreover, since the said pressurization apparatus 10 further has the auxiliary | assistant adjustment part 130 which can adjust the threshold pressure at the time of the auxiliary | assistant switching part 120 starting the operation | movement which connects the accommodating part 21 and the storage part 60, the storage part 60 Thus, the timing for returning the pressurized medium stored in the storage unit 21 to the storage unit 21 can be appropriately changed, and the apparatus is further improved in convenience.

  Next, a modified example of the connection switching unit that switches connection / separation between the first pressurizing unit 31 and the second pressurizing unit 35 will be described with reference to FIG.

  The connection switching unit can change its configuration as long as the first pressurizing unit 31 and the second pressurizing unit 35 are configured to be connectable and separable as the pressurizing unit 30 reciprocates. Is possible. For example, as shown in FIG. 16A, the structure of the locking portion 440a included in the connection switching portion 440 can be changed.

  The locking portion 440a according to the modified example includes a first inclined portion 441 that is inclined toward the distal end side and upward of the cylindrical body 20, a second inclined portion 442 that is inclined toward the distal end side and downward of the cylindrical body 20, A support portion 443 that rotatably attaches the locking portion 440a to the first pressurizing portion 31; The first inclined portion 441 is formed shorter than the second inclined portion 442.

  A guide groove 444 that guides the rotation of the first inclined portion 441 when the locking portion 440a rotates is formed in the first pressure unit 31. The second pressure part 35 is formed with a guide groove 445 in which a part of the second inclined part 442 of the locking part 440a is disposed.

  When the pressure unit 30 is moved forward by a predetermined distance in a state where the first pressure unit 31 and the second pressure unit 35 are connected via the locking unit 440a, the first of the locking unit 440a. The tip end portion of the inclined portion 441 hits the first abutting portion 41 formed on the cylindrical body 20. When the pressurizing unit 30 is further moved forward, the locking unit 440a rotates along the guide groove 444 as indicated by an arrow a in the drawing. By this rotation, the second inclined portion 442 of the locking portion 440a comes out of the guide groove 445, and the connection between the first pressure portion 31 and the second pressure portion 35 is released.

  On the other hand, in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are separated, the second pressurizing unit 35 is moved backward to form the second pressurizing unit 35. When the abutting portion 45 is abutted against the tip of the second inclined portion 442 of the locking portion 440a, the second abutting portion 45 is hooked on the second inclined portion 442, and the first pressurizing portion 31 and the first Two pressure parts 35 are connected.

  Even when the connection switching unit 440 according to the modification shown in FIG. 16A is applied, the connection-separation of the first pressurizing unit 31 and the second pressurizing unit 35 is reciprocated by the pressurizing unit 30. Accordingly, it is possible to switch appropriately.

  FIG. 16B shows a connection switching unit 540 according to another modification. When the connection-separation of the first pressurizing unit 31 and the second pressurizing unit 35 is switched, the user is clearly notified to the connection switching unit 540 according to this modification that the switching has been performed. A predetermined mechanism 550 that enables the above is provided.

  The mechanism 550 is disposed in the vicinity of the first abutting portion 41. The mechanism 550 includes a pressing member 551 configured by an elastic member and the like, and a biasing member 552 that applies a biasing force in the direction toward the locking portion 440a (downward in the drawing) to the pressing member 551. ing.

  With the first pressurizing unit 31 and the second pressurizing unit 35 connected, when the pressurizing unit 30 is moved forward to bring the locking unit 440a closer to the first abutting unit 41, A predetermined pressing force is applied from the pressing member 551 to the locking portion 440a.

  In addition, in a state where the first pressurizing unit 31 and the second pressurizing unit 35 are separated, the second pressurizing unit 35 is moved backward to hook the locking unit 440a on the second abutting unit 45. After that, when the first inclined portion 441 of the locking portion 440a is pulled out of the guide groove 444 by further moving backward, the pressing force acting on the locking portion 440a changes before and after the locking. Therefore, the user can more reliably confirm that the connection-separation switching has been performed by recognizing the pressing force applied to the locking portion 440a by the mechanism 550 with his / her hand. .

(Modification example)
FIG. 17 shows a pressurizing apparatus 600 according to a modified example. In the pressurizing device 600 according to this modified example, the seal portion 39 is formed between the pressurizing portion 30 and the narrow portion 25 in a state where the pressurizing portion 30 is pulled to the most proximal side (beginning of pressing). Further, the length of the narrow portion 25 in the axial direction is set. For this reason, since it becomes possible to pump the pressurized medium through the discharge port 23 immediately after the pressing unit 30 starts to be pushed, it becomes even easier to use. Moreover, since it becomes possible to ensure the capacity | capacitance of the accommodating part 21, it becomes possible to increase the pumping amount of a pressurized medium.

  The pressurizing apparatus according to the present invention has been described above through the embodiment, the modified examples, and the modified examples. However, the present invention is not limited to the contents described in the embodiments, and may be modified as appropriate based on the description of the claims. It is possible.

  Ancillary components described in the embodiments can be omitted as appropriate. For example, the pressurizing device only needs to be configured to be able to confirm with a sense of hand that the pumping at a predetermined target pressure has been performed when moving forward. It is possible to configure so as to have one communication switching part that opens and closes. Even in such a configuration, the pressurized medium flows into the storage portion in accordance with the change in the internal pressure of the storage portion, and the difference in operability before and after the inflow can be grasped with a sense of hand. In addition, it is possible to confirm that the pumping is performed, and it is possible to reduce the manufacturing cost and facilitate the manufacturing operation.

  Further, for example, it is possible to increase the number of communication ports and valve bodies to three or more so that pressurization can be performed in multiple stages with three or more target pressures. In addition, for example, it is possible to provide a discharge unit that discharges the pressurized medium from the storage unit to the outside of the storage unit when the internal pressure of the storage unit becomes equal to or higher than a specified pressure. In addition, for example, a stopper that restricts the movement of the pressurizing part is added when the pressurizing part is moved to the base end side of the cylindrical body in order to prevent the pressurizing part from coming out of the accommodating part of the cylindrical body. It is also possible to provide the pressure part or the cylinder. Further, for example, when the connection between the first pressurizing unit and the second pressurizing unit by the locking unit is released, the first pressurizing unit and the second pressurizing unit are connected by the locking unit. When the storage unit and the storage unit communicate with each other by each valve, when the communication is restricted (when the communication unit is disconnected), the fact that the connection switching unit, the valve, etc. It is also possible to provide notifying means for emitting a sound or light for notifying the user.

  Further, for example, the pressurizing device can be applied to a balloon other than a balloon used for expanding a stenosis formed in a living body, and an indwelling object (indwelling in a living body in a state of being expanded and deformed by various fluids ( It is also possible to apply to the operation of a biopsy technique to be inserted after the provisional positioning of the forceps or the heel operated by pressure, provisional positioning with provisional force, etc.

10, 600 pressurizing device,
20 cylinders,
21 containment section,
21a first accommodation area,
21b second accommodation area,
23 Discharge port,
30 pressure part,
31 1st pressurizing part,
35 second pressure part,
40 connection switching unit,
40a, 440, 540 locking part,
41 1st abutting part,
45 Second butting portion,
50 pushers,
60 reservoir,
70 communication port,
71 First communication port,
75 Second communication port,
80 communication switching part,
81 valve (first switching part),
82 valve (second switching part),
90 adjustment section,
91 1st adjustment part,
95 the second adjustment unit,
110 Auxiliary communication port,
120 auxiliary switching unit,
130 Auxiliary adjustment part,
200 balloon,
210 tubes,
300 medical devices,
P1 first specified pressure,
P2 Second specified pressure.

Claims (9)

A cylinder that includes an accommodating portion filled with a pressurized medium, and a discharge port provided on a distal end side of the accommodating portion;
A pressurizing unit configured to be capable of reciprocating in the accommodating portion of the cylindrical body, and for pumping the pressurizing medium through the discharge port with forward movement;
A pusher for operating the reciprocating motion of the pressure unit;
A reservoir that is in fluid communication with the housing through a communication port formed at a predetermined position between the distal end and the base end of the housing;
A communication switching unit that switches between communication and non-communication of the storage unit and the storage unit according to a change in internal pressure of the storage unit accompanying reciprocation of the pressurization unit;
The communication switching unit includes the storage unit, the storage unit, and the storage unit when the forwardly moved pressure unit reaches the tip of the storage unit and the internal pressure of the storage unit reaches a predetermined pressure. A pressure device that operates to communicate with each other.   The pressurizing device according to claim 1, wherein the communication switching unit includes a valve that allows the storage unit and the storage unit to communicate with each other when an internal pressure of the storage unit reaches a specified pressure. The communication port is
A first communication port;
A second communication port formed on the tip side of the first communication port, at least,
The communication switching unit
A first switching unit that is disposed in the first communication port, and causes the storage unit and the storage unit to communicate with each other when an internal pressure of the storage unit reaches a predetermined first specified pressure;
And at least a second switching unit that is disposed at the second communication port and communicates between the storage unit and the storage unit when an internal pressure of the storage unit reaches a predetermined second specified pressure. The pressurizing device according to claim 1 or 2.   The pressurizing device according to claim 3, wherein the second specified pressure is set to be larger than the first specified pressure. The accommodating portion is
A first containment area;
A second storage area located at the tip side of the first storage area and having a smaller cross-sectional area than the first storage area,
The pressurizing part is
A first pressure member reciprocated in the first accommodation region;
The second pressurization is reciprocated integrally with the first pressurizing portion in the first accommodating region, and is reciprocated separately from the first pressurizing portion in the second accommodating region. And at least
The connection switching part which switches connection-separation of a said 1st pressurization part and a said 2nd pressurization part with the reciprocation of the said pressurization part is further given in any one of Claims 1-4. Pressurizing device. The connection switching unit
A locking part for locking the second pressure part to the first pressure part and connecting the first pressure part and the second pressure part;
A first abutting part that separates the second pressurizing part from the first pressurizing part by being abutted against the locking part as the pressurizing part moves forward;
A second butting portion that causes the first pressurizing portion to latch the second pressurizing portion by being abutted against the locking portion as the second pressurizing portion moves backward; The pressurizing apparatus according to claim 5.   The pressurization device according to any one of claims 1 to 6, further comprising an adjustment unit capable of adjusting a threshold pressure when the communication switching unit starts an operation of communicating the storage unit and the storage unit. . An auxiliary communication port communicating the storage portion and the storage portion;
An auxiliary switching unit that is disposed in the auxiliary communication port and communicates between the storage unit and the storage unit when the internal pressure of the storage unit becomes smaller than the internal pressure of the storage unit as the pressurization unit moves backward. The pressurizing device according to any one of claims 1 to 7, further comprising:   The pressurizing device according to claim 8, further comprising an auxiliary adjustment unit capable of adjusting a threshold pressure when the auxiliary switching unit starts an operation of communicating the storage unit and the storage unit.