JP2013085911A - Syringe operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syringe operating device capable of surely preventing the mutual interlocking failure of threadeds in a lock mechanism when holding a pressurizing state and capable of making an appropriate pressure adjustment when excessive pressure is applied.SOLUTION: The syringe operating device includes a body part 11 assembling an outer cylinder 2 of a syringe 1, and a movable part 20 assembling a plunger 5 of the syringe 1. A shaft 15 extending in parallel with the syringe 1 is supported in an axially movable manner by the body part 11. The shaft 15 is integrally connected to the movable part 20, and the movable part 20 axially moves with respect to the body part 11. The lock mechanism 30 is formed with an internally threaded part 32 engaged with and released from an externally threaded part 15a of the shaft 15, and provided with a block 31 supported on the body part 11 side through an elastic body 34. The block 31 is displaced within the elastically deformable range of the elastic body 34 to eliminate the mutual interlocking deviation of the threaded parts.

Description

  The present invention relates to a syringe operating device that includes a syringe that sends out fluid to a connection destination, and that sends out fluid from the syringe and adjusts the pressure of the fluid.

  Conventionally, the types of catheters used to treat patients have also diversified. A balloon catheter is added to the distal end of the catheter, and the balloon is inflated and placed in the patient's body. As described in Japanese Patent Application Laid-Open No. 2010-35951, a movable catheter or the like that can be bent at a distal end is known. When using these catheters, a pressurizing device that generates pressure for inflating the balloon or bending the distal end portion is required.

  Here, as a pressurizing apparatus, an injection device (injection syringe), an inflation device with a pressure gauge, an injector, or the like has been mainly used. However, in the pressurizing operation by these, it is difficult to maintain the pressurized state, and it is difficult to finely adjust the pressure, so that appropriate operations in the balloon inflating operation and the catheter distal end bending operation are performed. There was a problem that could not.

  As a conventional technique capable of solving such a problem, as disclosed in Patent Document 1, a pressure is generated by pushing and pulling an insertion portion of a syringe, and a screw area is provided on the same axis as the insertion portion. The lower part of the clog rail component that engages and disengages with respect to the threaded area is provided with a number of teeth that mesh with the threaded area, and the biasing force of the helical spring causes the number of teeth to mesh directly with the threaded area. An indeflator device having a lock mechanism that holds the insertion portion of the syringe at this position is already known.

US2008 / 0077075A1

  However, in the conventional technique described in Patent Document 1 described above, when a large number of teeth on the clog rail component mesh with the screw area on the same axis as the insertion portion, the threads of each other come into contact with each other. Although it is necessary to deviate from the left and right by a half pitch, there is no specific disclosure of a device for that purpose. Therefore, since both shift operations cannot be performed, there is a possibility that the two cannot be completely engaged with each other.

  In addition, it is equipped with a pressure gauge to measure the pressure when generating pressure, but this does not actively adjust the pressure increase / decrease for sending out the fluid. Even if a sudden increase in pressure occurred, no adjustment could be made. For this reason, there is a possibility that the catheter or the indeflator device itself may be damaged due to excessive pressurization, and there is a problem in safety for the patient.

  The present invention has been made paying attention to the above-described problems of the prior art, and allows fine adjustment of the pressure increase / decrease when the fluid is delivered, and locks when maintaining the pressurized state. It is possible to reliably prevent inadequate engagement between screws in the mechanism, and to adjust to an appropriate pressure when excessive pressure is applied, preventing damage to the catheter and the device itself, It aims at providing the syringe operating device which can also improve safety | security.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] In a syringe operating device (10) that includes a syringe (1) that sends out a fluid to a connection destination, sends out the fluid from the syringe (1), and adjusts the pressure of the fluid.
The main body (11) for assembling and holding the outer cylinder (2) of the syringe (1) and the base end of the plunger (5) moving in the outer cylinder (2) of the syringe (1) are assembled and held. A movable part (20) for moving the plunger (5) in the axial direction,
A shaft (15) extending parallel to the syringe (1) is supported on the main body (11) so as to be movable in the axial direction, and a base end of the shaft (15) is integrated with the movable part (20). Connected, the movable part (20) is movable in the axial direction together with the plunger (5) and the shaft (15) with respect to the main body part (11),
A lock mechanism (30) for restricting the axial movement of the plunger (5) via the movable part (20) by being engaged with and disengaged from the shaft (15). Is provided,
The lock mechanism (30) is formed with a female screw portion (32) that engages and disengages from a direction orthogonal to the axial direction of the male screw portion (15a) formed on the outer periphery of the shaft (15). A block (31) supported on the main body (11) side through an elastic body (34);
The block (31) includes the shaft (15) formed by the movable portion (20) in the axial movement of the plunger (5) when the female screw portion (32) is engaged with the male screw portion (15a). ) And the engagement position where the rotation operation around the axis is required, and the female screw part (32) is detached from the male screw part (15a) to move the plunger (5) in the axial direction. ) And can be moved to a disengagement position that does not require rotation around the axis.
The block (31) is configured such that the elastic body (34) can be elastically deformed so as to eliminate any meshing when the female screw portion (32) is engaged with the male screw portion (15a). A syringe operating device (10) characterized in that it can be displaced in the axial direction with respect to the main body (11) side.

[2] The main body (11) includes a storage cylinder (14) through which at least the front half including the male thread (15a) of the shaft (15) is inserted so as to be movable in the axial direction. (14) is provided with an opening (14a) for allowing the block (31) to appear and disappear,
The block (31) is supported movably between the engagement position and the disengagement position in a state of being sandwiched by the elastic body (34) from before and after the opening (14a). The syringe operating device (10) according to [1].

[3] The lock mechanism (30) includes a lever (35) that moves the block (31) to the engagement position and the disengagement position,
An eccentric shaft (36) is supported by the lever (35) at a position eccentric from the rotation center thereof, and a cam groove (33) through which the eccentric shaft (36) is inserted in the block (31) so as to be pushed and pulled. )
When the lever (35) is in the initial position, the eccentric shaft (36) engages with one end of the cam groove (33) to hold the block (31) in the disengaged position. When the shaft (35) is rotated by a predetermined angle, the eccentric shaft (36) relatively moves from one end side to the other end side of the cam groove (33), while the block (31) is engaged from the disengaged position. The syringe operating device (10) according to [1] or [2], wherein the syringe operating device (10) is held at the engagement position after being moved to a position.

  [4] The block (31) has one end side higher than the other end side on both sides of the circular cross section of the female screw portion (32), and the female screw portion (32) is formed on the male screw portion (15a). The syringe operating device according to [1], [2] or [3], wherein the syringe operating device has a shape that engages with the male screw portion (15a) first from the higher one end side when engaged. (10).

  [5] The movable part (20) has a handle (21) integrally fixed to a base end of the shaft (15), and a relative position with respect to the shaft (15) at a position in front of the handle (21). And [1], [2], characterized by comprising a holder (22) for assembling the base end of the plunger (5) in a state where the outer end is rotatably fitted and the movement in the axial direction is fixed The syringe operating device (10) according to [3] or [4].

[6] The main body (11) is provided with a joint (40) that communicates with the distal end (3) of the outer cylinder (2) of the syringe (1) and can be connected to the connection destination. ,
The joint (40) branches off from the delivery path (41) through which the fluid delivered from the syringe (1) by operation of the movable part (20) passes and the middle of the delivery path (41) to release excess pressure. A release path (42) for
When the movable part (20) is operated in the release path (42) exceeding a predetermined pressure value, a pressure adjustment valve (45 for releasing the amount exceeding the predetermined pressure value to the outside) The syringe operating device (10) according to [1], [2], [3], [4] or [5].

[7] The pressure adjusting valve (45) is provided with a tank (50) that receives fluid in excess of the predetermined pressure value and is pre-filled with air,
The tank (50) is provided with a discharge part (53) for releasing only the air corresponding to the amount of the fluid to the outside when the fluid exceeding the predetermined pressure value is received. The syringe operating device (10) according to the above [6].

[8] The fluid sent out from the syringe (1) is a liquid,
The syringe operating device (10) according to [7], wherein the discharge section (53) includes a waterproof ventilation sheet (54).

Next, the operation based on the above solution will be described.
According to the syringe operating device (10) described in [1], the lock mechanism (30) is in the released state, that is, the female screw portion (32) of the block (31) is the male screw portion (15a) of the shaft (15). The plunger (5) inserted into the outer cylinder (2) of the syringe (1) is also moved by moving the movable part (20) in the axial direction together with the shaft (15). Can move together.

  Here, when sending the fluid in the outer cylinder (2) of the syringe (1) and pressurizing the connection destination, the plunger (5) is moved to the tip of the syringe (1) via the movable part (20). Move to push towards the end (3). On the other hand, when performing pressure reduction at the connection destination, the plunger (5) is moved through the movable portion (20) so as to be pulled back from the distal end (3) of the syringe (1) toward the proximal end opening. In any operation, since the lock mechanism (30) is in the released state, the movable part (20) can be moved so as to be easily pushed and pulled in the axial direction.

  In order to maintain this pressurized state when a predetermined pressure is generated at the connection destination, the lock mechanism (30) is brought into a restrained state. That is, the block (31) is moved in a direction (axial direction) perpendicular to the axial direction of the shaft (15), and the female screw portion (32) is engaged with the male screw portion (15a) of the shaft (15). At this time, even if there is a deviation in the meshing of each screw part such as the screw threads of each screw part just contacting each other, the block (31) is the main body within the range in which the elastic body (34) supporting this can be elastically deformed. Since it can be displaced in the axial direction with respect to the part (11) side, any engagement is easily eliminated by this play. Further, the block (31) does not rattle due to the elastic force of the elastic body (34).

  As described above, when the female screw portion (32) of the block (31) is in a restrained state in which the female screw portion (15a) of the shaft (15) is engaged, the repulsive force due to the pressurization is locked and the pressurized state. Is retained. In this state, the shaft (15) (and the plunger (5)) can be moved in the axial direction by rotating the shaft (15) about the axis by the movable portion (20). By this rotation operation, the male screw portion (15a) of the shaft (15) advances and retreats with the rotation with respect to the female screw portion (32) in which the movement in the axial direction other than the play is fixed. Can be adjusted as appropriate. Alternatively, the block (31) is constrained at a position where no pressure is generated at the connection destination, and thereafter, the operation is performed so that a predetermined pressure is generated only by rotating the shaft (15). You may do it.

  According to the syringe operating device (10) described in [2], the main body (11) is housed so that at least the front half including the male screw (15a) of the shaft (15) is movably inserted in the axial direction. A cylindrical portion (14) is provided, and an opening (14a) for allowing the block (31) to appear and disappear is provided in the middle of the storage cylindrical portion (14). The block (31) is supported movably between an engagement position and a disengagement position while being sandwiched between elastic bodies (34) from before and after the opening (14a). With such a simple configuration, the lock mechanism (30) can be configured at low cost.

  According to the syringe operating device (10) described in [3], the lock mechanism (30) includes the lever (35) that moves the block (31) between the engagement position and the disengagement position. An eccentric shaft (36) is supported by the lever (35) at a position eccentric from the center of rotation thereof, and a cam groove (33) through which the eccentric shaft (36) can be pushed and pulled is inserted into the block (31). ) Is provided.

  When the lever (35) is in the initial position, the eccentric shaft (36) engages with one end of the cam groove (33) to hold the block (31) in the disengaged position. On the other hand, when the lever (35) is rotated by a predetermined angle, the eccentric shaft (36) relatively moves from one end side to the other end side of the cam groove (33) while engaging the block (31) from the disengagement position. After being moved to the alignment position, the engagement position is maintained. With such a simple configuration, an operation of easily moving the block (31) becomes possible.

  According to the syringe operating device (10) described in [4], the block (31) has one end side higher than the other end side in the arc-shaped cross section of the female screw portion (32), and the female screw portion (32). When the portion (32) is engaged with the male screw portion (15a), it is configured to be engaged with the male screw portion (15a) first from the higher one end side. With this shape, when the block (31) is moved from the disengagement position to the engagement position and the female screw portion (32) is engaged with the male screw portion (15a), the male screw portion is engaged with the male screw portion (15a) from the higher side. The female screw part (32) of the block (31) can be smoothly meshed along the screw thread on the (15a) side.

  According to the syringe operating device (10) described in [5], the movable part (20) includes a handle (21) integrally fixed to a proximal end of the shaft (15), and the handle (21). And a holder (22) for assembling the base end of the plunger (5) in a state in which the shaft (15) is rotatably fitted relative to the shaft (15) and the axial movement is fixed. Thereby, the rotation operation of the shaft (15) by the handle (21) is not transmitted to the plunger (5), but the axial operation by the handle (21) is directly transmitted to the plunger (5), and the handle (21) Synchronously, the plunger (5) can also be moved in the axial direction.

  According to the syringe operating device (10) described in [6], the main body (11) communicates with the distal end (3) of the outer cylinder (2) of the syringe (1) and is connected to the connection destination. The joint part (40) which can be connected is provided. This joint part (40) is branched from the delivery path (41) through which the fluid delivered from the syringe (1) by the operation of the movable part (20) passes, and to release excess pressure in the middle of the delivery path (41). A release path (42).

  When the movable part (20) exceeding a predetermined pressure value is operated on the release path (42), a pressure adjusting valve (45) that releases the amount exceeding the predetermined pressure value to the outside. ). As a result, there is no risk of over-pressurization due to an erroneous operation or the like on the connection destination catheter or the present device itself, and the patient's safety is improved.

  According to the syringe operating device (10) described in [7], the pressure adjusting valve (45) has a tank (50) that receives fluid in excess of a predetermined pressure value and is pre-filled with air. The tank (50) is provided with a discharge part (53) for releasing only air corresponding to the amount of the fluid to the outside when the fluid exceeding the predetermined pressure value is received. As a result, the fluid discharged due to excessive pressure can be stored in the tank (50) without leaking outside.

  According to the syringe operating device (10) described in [8], the fluid sent out from the syringe (1) is a liquid, and the discharge part (53) includes a waterproof ventilation sheet (54). Become. Thereby, it is possible to release the pressure by discharging only air while reliably storing the liquid as a fluid in the tank (50) without leaking to the outside.

  According to the syringe operating device according to the present invention, the pressurization state generated by sending out the fluid can be held by the lock mechanism, and the pressure adjustment can be finely adjusted by the screw structure of the lock mechanism. It is possible to reliably prevent the meshing failure of the screws in the mechanism.

  In addition, when an excessive pressure is applied, the pressure can be adjusted to an appropriate pressure, damage to the connection destination and the device itself can be reliably prevented, and patient safety can be further improved. Furthermore, the fluid discharged with the pressure adjustment can be stored in the tank without leaking outside.

It is a longitudinal section showing the state where the syringe operation device concerning an embodiment of the invention was unlocked. It is a longitudinal section showing the state where the syringe operation device concerning an embodiment of the invention was locked. It is a front view which shows the syringe operating device which concerns on embodiment of this invention. It is a top view which shows the syringe operating device which concerns on embodiment of this invention. It is a top view which partially fractures and shows the joint part etc. of the syringe operating device which concerns on embodiment of this invention. It is a side view which shows the syringe operating device which concerns on embodiment of this invention. It is explanatory drawing which shows the position of a lever when the block of the syringe operating device which concerns on embodiment of this invention exists in a removal position. It is explanatory drawing which shows the position of a lever when the block of the syringe operating device which concerns on embodiment of this invention exists in an engagement position. It is explanatory drawing which shows the engagement operation | movement of a block when there is no elastic body in the syringe operating device which concerns on embodiment of this invention. It is explanatory drawing which shows the engagement operation | movement of a block when there is no elastic body in the syringe operating device which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which has the block of the syringe operating device which concerns on embodiment of this invention in a removal position. It is a longitudinal cross-sectional view which shows the state which has the block of the syringe operating device which concerns on embodiment of this invention in an engagement position. It is a longitudinal cross-sectional view which shows the pressure control valve of the syringe operating device which concerns on embodiment of this invention. It is a top view which partially fractures | ruptures and shows a joint part etc. in order to demonstrate operation | movement of the pressure control valve of the syringe operating device which concerns on embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment that represents the present invention will be described based on the drawings.
1 to 14 show an embodiment of the present invention.
A syringe operating device 10 according to the present embodiment includes a syringe 1 that sends out a fluid to a connection destination, and is a device that sends out the fluid from the syringe 1 and adjusts the pressure of the fluid.

  As shown in FIGS. 1 to 6, the syringe operating device 10 is assembled by assembling a main body 11 that holds the outer cylinder 2 of the syringe 1 and holds the base end of the plunger 5 that moves in the outer cylinder 2 of the syringe 1. And a movable portion 20 that holds and moves the plunger 5 in the axial direction. In the following, an example will be described in which the fluid delivered from the syringe 1 is sterilized distilled water, and the catheter described in Japanese Patent Application Laid-Open No. 2010-35951 already proposed by the applicant is used as the connection destination of the syringe 1.

  First, the syringe 1 is obtained by removing a needle from a so-called general-purpose syringe, and includes a cylindrical outer cylinder 2 having both ends opened and a plunger 5 that moves in the outer cylinder 2. One end side of the outer cylinder 2 is a small opening end 3, and the other end side is greatly opened, and the plunger 5 is inserted into the outer cylinder 2 from this opening. The plunger 5 (the tip thereof) is slidably inserted while closing the inner wall of the outer cylinder 2.

  The plunger 5 is pushed forward from the opening side toward the tip port 3 in order to send out the fluid (liquid or gas) in the outer tube 2 from the tip port 3, while the tip port is used to suck fluid into the outer tube 2 through the tip port 3. It moves so that it may be pulled from 3 toward the opening side. A flange-shaped flange 4 protrudes from the opening edge of the outer cylinder 2. Further, the base end side of the plunger 5 protrudes to the outside from the opening of the outer cylinder 2 and is provided with a disk-shaped finger element 6.

  As shown in FIG. 1, the main body 11 forms a housing for unitizing the entire apparatus, and is specifically formed in a shape that is easy to grip. The main body 11 may be molded from a synthetic resin such as polypropylene, polyacetal, or polycarbonate. A ring-shaped mounting portion 12 that holds the opening side of the outer cylinder 2 of the syringe 1 is provided at the upper rear end of the main body 11, and the front end 3 of the outer cylinder 2 is held at the upper front end of the main body 11. An insertion portion 13 is provided.

  The outer cylinder 2 is inserted into the mounting portion 12, the flange 4 on the opening side is moved over the engagement claw 12a on the inlet side of the mounting portion 12, and the flange 4 is fitted on the back side of the engagement claw 12a. By fitting into the groove 12b, the body portion 11 is integrally mounted. In this state, the distal end 3 of the outer cylinder 2 is fitted into the insertion portion 13 and communicates with a joint portion 40 described later via the insertion portion 13.

  A cylindrical storage tube portion 14 extending over the entire length is provided at the lower portion of the main body portion 11, and a shaft 15 extending parallel to the syringe 1 is movable in the storage tube portion 14 in the axial direction. It is supported by. The base end of the shaft 15 is integrally connected to a movable portion 20 described below, and the movable portion 20 can move in the axial direction together with the shaft 15 and the plunger 5 with respect to the main body portion 11. A male screw portion 15a is formed on the outer periphery from the tip of the shaft 15 to the rear half.

  A grip 16 is provided along the lower side of the storage cylinder 14 to attach a finger when the syringe operating device 10 is gripped. Thus, a lock mechanism 30 that restricts the movement of the plunger 5 in the axial direction via the movable portion 20 is provided. Details of the lock mechanism 30 will be described later.

  The movable part 20 includes a handle 21 that is grasped and pushed / pulled or rotated, and a holder 22 that is positioned in front of the movable part 20 and that is assembled with the proximal end of the plunger 5. Such a movable part 20 is also preferably formed of a synthetic resin such as polypropylene, polyacetal, polycarbonate, or the like. The handle 21 is formed in a dial shape that is easy to grip, and the base end of the shaft 15 is integrally secured to the center thereof.

  The holder 22 is fitted on the front side of the handle 21 so as to be rotatable relative to the shaft 15, and the base end of the plunger 5 is assembled in a state where the movement in the axial direction is fixed. By inserting the shaft 15 inside the cylindrical portion of the holder 22, the shaft 15 freely rotates around the axis with respect to the holder 22, but the holder 22 protrudes from the outer periphery of the shaft 15 with a flange-like protrusion 15 b. And the handle 21, the axial movement relative to the shaft 15 is fixed.

  Therefore, the movement of the movable portion 20 in the axial direction (front-rear direction) is interlocked with the shaft 15. A mounting portion 23 projects from one end of the outer periphery of the holder 22 in a direction orthogonal to the axial direction. The attachment portion 23 has a recess 24 into which the disc-shaped finger ate 6 at the proximal end of the plunger 5 of the syringe 1 is fitted, and the finger ate 6 is moved over the engaging claw 25 in the recess 24. By inserting, the base end of the plunger 5 is integrally assembled with the holder 22. Therefore, the movement of the movable portion 20 in the axial direction (front-rear direction) is also interlocked with the plunger 5.

  The lock mechanism 30 includes a block 31 that engages and disengages from the direction orthogonal to the axial direction of the male screw portion 15a of the shaft 15. The block 31 has a female screw portion 32 that matches the male screw portion 15a on the upper surface side. The block 31 is supported on the main body 11 side through an elastic body 34.

  Specifically, as shown in FIG. 11, the block 31 is formed by combining two parts divided into upper and lower parts, and a cam groove 33 having a long hole cross-sectional shape extending in the front-rear direction is formed at the center of the joint. ing. The female screw portion 32 is formed on the upper surface side of the upper half portion. As shown in FIG. 7C, the female screw portion 32 has one end side higher than the other end side on both sides in the arc-shaped cross section, and the higher one when the female screw portion 32 engages with the male screw portion 15a. It is the shape which engages with this male screw part 15a previously from the one end side.

  The block 31 includes an engagement position (see FIG. 12) where the female screw portion 32 engages with the male screw portion 15a of the shaft 15, and a disengagement position where the female screw portion 32 is detached from the male screw portion 15a (see FIG. 11). ) And moveable. As shown in FIG. 1, the block 31 is movably disposed on the rear end side of the internal space of the grip portion 16. As shown in FIG. 11, an opening 14 a for allowing the block 31 to protrude from the gripping portion 16 side to the male screw portion 15 a side is provided in the middle of the storage cylinder portion 14 where the block 31 is located.

  As shown in FIG. 2, when the block 31 is in the engagement position, the handle 21 needs to be rotated around the shaft 15 by the handle 21 in order to move the plunger 5 of the syringe 1 in the axial direction. . On the other hand, as shown in FIG. 1, when the block 31 is in the disengaged position, the shaft 15 can be moved in the axial direction without rotating the shaft 15 by the handle 21.

  The block 31 is supported movably between the engagement position and the disengagement position in a state of being sandwiched between a pair of elastic bodies 34 and 34 from before and after the opening 14a. With the support via the elastic body 34, the block 31 is within a range in which the elastic body 34 can be elastically deformed so as to cancel any meshing when the female screw portion 32 is engaged with the male screw portion 15 a. It can be displaced in the axial direction with respect to the main body 11 side.

  Specifically, as shown in FIG. 11, the elastic body 34 is obtained by cutting a tube formed of an elastically deformable material into a predetermined length. Here, as specific materials, for example, polyurethane, ethylene propylene copolymer, silicone rubber and the like are suitable. Furthermore, the lock mechanism 30 includes a lever 35 for moving the block 31 between the engagement position and the disengagement position. As shown in FIG. 3, the lever 35 is pivotally attached to the rear end side of the grip 16.

  As shown in FIGS. 7 and 8, an eccentric shaft 36 is supported by the lever 35 at a position eccentric from the rotation center S thereof. The eccentric shaft 36 is inserted through the cam groove 33 of the block 31 so as to be pushed and pulled. That is, when the lever 35 rotates, the eccentric shaft 36 relatively moves in the cam groove 33 and engages and pushes the both ends of the cam groove 33, whereby the block 31 can be linearly moved.

  As shown in FIGS. 7 (a) and 7 (b), when the lever 35 is in the initial position where the tip side extends in parallel with the axial direction of the shaft 15, as shown in FIGS. 7 (c) and 1, The eccentric shaft 36 engages with one end side (left end in FIG. 1) of the cam groove 33 to hold the block 31 in the disengaged position. On the other hand, as shown in FIGS. 8A and 8B, when the lever 35 is rotated 90 degrees counterclockwise, the eccentric shaft 36 moves relatively from one end side to the other end side of the cam groove 33. However, as shown in FIG. 8C and FIG. 2, the block 31 is set to be moved from the disengagement position to the engagement position and held in the engagement position.

  Further, as shown in FIG. 1, a joint portion 40 that communicates with the distal end port 3 of the outer cylinder 2 of the syringe 1 through the insertion portion 13 on the distal end side of the main body portion 11 and can be connected to a connection destination. Is provided. As shown in FIGS. 5 and 13, the joint portion 40 is basically a three-way cock shape, and a delivery path 41 through which a fluid delivered from the syringe 1 is operated by the operation of the movable part 20, and the delivery path 41. And a release path 42 for branching from the middle of the cylinder and releasing excess pressure.

  A flexible tube 43 is connected to the downstream end of the delivery path 41, and a clamp 44 is attached to the distal end of the tube 43 for connection to a catheter or the like that is a connection destination. Here, as described above, a catheter described in Japanese Patent Application Laid-Open No. 2010-35951 already proposed by the applicant of the present application is suitable for the catheter as the connection destination. Further, the release path 42 is provided with a pressure adjustment valve 45 that releases the amount exceeding the predetermined pressure value to the outside when the movable unit 20 is operated exceeding the predetermined pressure value. Yes.

  The pressure adjusting valve 45 includes a valve body 46 that is attached to and detached from a valve seat 42 a formed in the middle of the release path 42. The valve body 46 is mounted with a load applied to the valve seat 42 a in the release path 42 by an adjustment screw 48 via a spring 47. Here, the valve seat 42a is formed as a part of the inner peripheral wall of the release path 42 inclined in a tapered shape, and the valve body 46 is made of valve rubber. Further, the adjustment screw 48 has a through hole 48a communicating with the outside (a tank 50 described later).

  The adjustment screw 48 is screw-fitted to the vicinity of the outlet of the release path 42 in the joint portion 40, and adjusts the elastic force of the spring 47 by adjusting the mounting position by turning the adjustment screw 48, and the discharge pressure. The value can be set arbitrarily. That is, when the adjusting screw 48 is turned deeply and attached, the spring 47 has a strong resilience and a high discharge pressure value. On the other hand, when the adjustment screw 48 is turned in the opposite direction and is mounted shallowly, the spring force of the spring 47 becomes weak and the discharge pressure value becomes low.

  When the pressurization is lower than the discharge pressure value, the valve body 46 pushed by the elastic force of the spring 47 comes into contact with the valve seat 42a of the release path 42 and closes the release path 42 (the delivery path 41). On the other hand, when the pressurization becomes higher than the discharge pressure value, the elastic force of the spring 47 loses the pressurization, the valve body 46 moves, the valve body 46 moves away from the valve seat 42a, and the release path 42 (the delivery path 41) is opened. It is set to open.

  When the valve body 46 is separated from the valve seat 42 a, the fluid (sterile distilled water) that is a pressurized medium passes through the peripheral portion of the valve body 46 and is discharged from the through hole 48 a of the adjustment screw 48. By discharging the pressurized medium, the pressure in the pressure adjusting valve 45 is reduced, and by reducing the pressure, the elasticity of the spring 47 is won, returning to the original position in contact with the valve body 46 and adjusting the pressure again. The valve 45 will be closed. The discharge pressure value is adjusted to a predetermined pressure value at the manufacturing stage.

  The pressure adjusting valve 45 is provided with a tank 50 that receives fluid in excess of the predetermined pressure value and is pre-filled with air. As shown in FIG. 5, the tank 50 includes a connecting portion 51 that is fitted around the outlet of the release path 42 in the joint portion 40, a cylindrical tank body 52, and air in the tank body 52 to the outside. A discharge unit 53 for discharging.

  When the tank 50 receives a fluid whose amount exceeds the predetermined pressure value, the discharge unit 53 discharges only air corresponding to the amount of the fluid to the outside. Specifically, the discharge unit 53 includes a vent hole communicating with the outside, and a vent sheet 54 that allows only gas to pass but does not allow liquid to pass therethrough is provided so as to cover the vent hole.

Next, the operation of the syringe operation device 10 according to the present embodiment will be described.
According to the syringe operating device 10, the lock mechanism 30 is in the released state, that is, as shown in FIG. 7, the lever 35 is in the initial position, and the female screw portion 32 of the block 31 is disengaged from the male screw portion 15 a of the shaft 15. When in the disengaged position, the plunger 5 of the syringe 1 can be moved together by moving the movable portion 20 together with the shaft 15 in the axial direction.

  When the fluid in the outer cylinder 2 of the syringe 1 is sent out to pressurize the catheter, the handle 21 may be pushed and slid so as to push the plunger 5 toward the distal end 3 of the syringe 1. On the other hand, when decompressing the catheter, the handle 21 is pulled and the plunger 5 is slid back from the distal end 3 of the syringe 1 toward the proximal end. In any operation, since the lock mechanism 30 is in the released state, the movable part 20 including the handle 21 can easily slide in the axial direction.

  When a predetermined pressure is generated in the catheter, in order to maintain this pressurized state, the lock mechanism 30 is brought into a restrained state. That is, as shown in FIG. 8, the lever 35 is rotated 90 degrees counterclockwise to move the block 31 in a direction orthogonal to the axial direction of the shaft 15, and the female screw portion 32 is moved to the male screw portion 15 a of the shaft 15. What is necessary is just to engage.

  As shown in FIG. 8 (c), the arc-shaped cross section of the female screw portion 32 of the block 31 has a stepped shape in which one end side is higher than the other end side. Engage with the portion 15a. Thereby, the internal thread part 32 can be meshed | engaged smoothly with respect to the external thread part 15a. If the height of both sides in the arc-shaped cross section of the female thread portion 32 is the same, the threads need to be engaged at the right and left at the same time. There is a possibility that the pitch may be shifted, which may cause the engagement to be impossible or the parts to be damaged.

  By the way, when engaging the female screw portion 32 with the male screw portion 15a, in the state shown in FIG. 9A, if the block 31 is lifted as it is and is engaged with the male screw portion 15a of the shaft 15, It is assumed that the screw threads of the portion 15a and the female screw portion 32 are just in contact with each other and the screws do not mesh well. Actually, as shown in FIG. 9B, the width of the top of the screw thread is very small, and even if the tops are in contact with each other, the screw with the smaller contact resistance is shifted by a half pitch back and forth so that the screws mesh with each other. become.

  Here, since the shaft 15 is connected to the plunger 5 via the movable portion 20, the resistance is large and it is difficult to shift back and forth, and the opening in the storage cylinder portion 14 is operated so that the block 31 side shifts. A gap of about a half pitch is set between both ends of 14 a and the front and rear of the block 31. However, there may be a case where the block 31 is not always at a position shifted by a half pitch by simply providing a half pitch gap before and after the storage cylinder portion 14 and the block 31. For example, when the entire syringe operating device 10 is inclined on the left side (front side) in the drawing, the block 31 is shifted to the front side by its own weight as shown in FIG.

  When the block 31 is lifted in such a state shown in FIG. 10, the block 31 needs to be further shifted to the left side (front side) from the meshing of the female screw part 32 with the male screw part 15 a, but the opening 14 a Since it abuts against the edge of one end, there is no further displacement. Here, the shaft 15 cannot be displaced due to the connection resistance with the plunger 5 or the like, and both cannot be displaced, so that the screws cannot be completely engaged with each other.

  Therefore, in this syringe operating device 10, as shown in FIGS. 11 and 12, the elastic body 34 grips the front and rear in order to hold the block 31 at a position where it can always move back and forth by a half pitch. Thus, by supporting the block 31 so as to be movable between the engagement position and the disengagement position while being sandwiched by the elastic body 34 from the front and rear, the elastic body 34 is moved when the block 31 is displaced forward and backward. By bending, a slight resistance is generated in the operation of the lever 35, but a normal operation of the lever 35 that does not cause breakage and a reliable screw engagement between the shaft 15 and the block 31 can be realized.

  In other words, even if the threads of the female threaded portion 32 of the block 31 and the male threaded portion 15a of the shaft 15 are just in contact with each other, even if there is a shift in the mutual meshing, the block 31 is an elastic body 34 that supports this. Can be displaced in the axial direction (front-rear) with respect to the main body 11 side within a range in which elastic deformation is possible, and any engagement is easily eliminated by this play. Thereby, the malfunction that the lever 35 cannot be rotated and the breakage | damage of the lever 35 by an unreasonable operation can be prevented reliably. Further, the operational discomfort that the position of the shaft 15 must be finely adjusted without being locked when intended can be eliminated.

  As shown in FIG. 12, when the female screw portion 32 of the block 31 is in a restrained state where the female screw portion 32 is engaged with the male screw portion 15 a of the shaft 15, the repulsive force due to pressurization is locked and the pressurized state is maintained. To move the plunger 5 in the axial direction together with the shaft 15 in such a state, the shaft 15 may be rotated around the axis by the handle 21. By this rotational operation, the male screw portion 15a of the shaft 15 advances and retreats with the rotation with respect to the female screw portion 32 in which the movement in the axial direction other than the play is fixed, and fine adjustment of the pressure increase / decrease at the connection destination is performed. Is possible. Alternatively, the block 31 is constrained at a position where no pressure is generated at the connection destination, and thereafter the pressure is gradually increased so that a predetermined pressure is generated only by the rotation operation of the shaft 15 by the handle 21. May be.

  Specifically, in FIG. 6, when the handle 21 is rotated forward in the direction of the “+” symbol, the shaft 15 moves forward by the rotation amount, and the plunger 5 is also moved through the movable portion 20 to the distal end of the syringe 1. The pressure can be gradually adjusted toward 3, and the pressure can be adjusted appropriately. On the other hand, when the handle 21 is reversely rotated in the direction of the “−” symbol, the shaft 15 moves backward by the amount of rotation, and the plunger 5 is gradually pulled back toward the opening of the syringe 1 through the movable portion 20. Thus, the reduced pressure can be adjusted as appropriate.

  As shown in FIGS. 13 and 14, a pressure adjusting valve 45 that suppresses excessive pressure is attached to the joint portion 40 that communicates with the distal end 3 of the syringe 1. As a result, there is no risk of over-pressurization due to an erroneous operation or the like on the connection destination catheter or the present device itself, and the patient's safety is improved. That is, when pressurization exceeding the intended pressure value is performed, in FIG. 13, when the elastic force of the spring 47 loses the pressurization, the valve body 46 moves away from the valve seat 42 a and releases the release path 42. (Sending path 41) is opened.

  Then, the fluid (sterile distilled water) that is a pressurized medium passes through the peripheral portion of the valve body 46 and is discharged from the through-hole 48a of the adjusting screw 48 to adjust the excess pressure. When the pressure in the pressure adjusting valve 45 is reduced by discharging the fluid (sterilized distilled water) in this way, the resilience of the spring 47 is won and the original position where it comes into contact with the valve body 46 is restored. Thus, the pressure adjustment valve 45 is closed. The discharge pressure value can be adjusted to a predetermined pressure value.

  Usually, the fluid (sterilized distilled water) discharged at an excessive pressure is discharged to a drainage bag, a cup, or the like through a tube. In this case, the carrying operation of the syringe operating device 10 is restricted. Therefore, by connecting the tank 50 to the pressure adjusting valve 45 as in the present syringe operating device 10, there is no restriction on the carrying operation of the syringe operating device 10, and the fluid discharged due to excessive pressure is not leaked to the outside. It can be stored in the tank 50.

  In addition, the tank 50 is provided with a discharge portion 53 that discharges only air corresponding to the amount of the fluid to the outside when the fluid exceeding the predetermined pressure value is received. The discharge portion 53 is waterproof. Therefore, it is possible to release the pressure by discharging only air while reliably storing the fluid (sterilized distilled water) in the tank 50 without leaking it to the outside. Therefore, the tank 50 can be properly depressurized, and there is no possibility of damage due to an excessive increase in internal pressure.

  The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration is not limited to the above-described embodiments, and the present invention can be changed or added without departing from the scope of the present invention. Included in the invention. For example, in the above-described embodiment, the elastic body 34 is formed by cutting a tube formed of a material that can be elastically deformed into a predetermined length. However, for example, other structures such as a spring may be adopted. Absent. Moreover, although the syringe 1 was comprised so that a general purpose thing might be combined, you may comprise so that it may integrate integrally previously.

  The syringe operation device according to the present invention is for delivering fluid from a syringe and adjusting the pressure increase / decrease of the fluid, and is particularly applicable to the operation of a catheter as a connection destination.

DESCRIPTION OF SYMBOLS 1 ... Syringe 2 ... Outer cylinder 3 ... Tip port 4 ... Collar 5 ... Plunger 6 ... Finger element 10 ... Syringe operation device 11 ... Main-body part 12 ... Mounting part 13 ... Insertion part 14 ... Storage cylinder part 14a ... Opening part 15 ... Shaft 15a ... male screw portion 16 ... gripping portion 20 ... movable portion 21 ... handle 22 ... holder 23 ... mounting portion 24 ... concave portion 25 ... engagement claw 30 ... lock mechanism 31 ... block 32 ... female screw portion 33 ... cam groove 34 ... elasticity Body 35 ... Lever 36 ... Eccentric shaft 40 ... Joint section 41 ... Sending path 42 ... Release path 42a ... Valve seat 43 ... Tube 44 ... Clamp 45 ... Pressure adjusting valve 46 ... Valve body 50 ... Tank 51 ... Connection part 52 ... Tank body 53 ... discharge part 54 ... ventilation sheet

Claims (8)

In the syringe operation device for adjusting the pressure increase / decrease of the fluid while sending out the fluid from the syringe with the syringe that sends out the fluid to the connection destination,
A main body part that assembles and holds the outer cylinder of the syringe, and a movable part that assembles and holds the base end of the plunger that moves in the outer cylinder of the syringe and moves the plunger in the axial direction.
A shaft extending parallel to the syringe is supported by the main body portion so as to be movable in the axial direction, and a base end of the shaft is integrally connected to the movable portion, and the movable portion is connected to the main body portion with respect to the main body portion. Axially movable with the plunger and the shaft,
The main body portion is provided with a lock mechanism that regulates the movement of the plunger in the axial direction via the movable portion by being engaged with and disengaged from the shaft.
The lock mechanism has a female screw portion formed on the outer periphery of the shaft, and has a female screw portion that is engaged and disengaged from a direction orthogonal to the axial direction, and is supported on the main body portion side through an elastic body. Block
The block includes an engagement position where the female threaded portion is engaged with the male threaded portion, and the movable portion needs to be rotated around the shaft by the movable portion to move in the axial direction of the plunger, and the female The threaded portion is disengaged from the male threaded portion and is movable to a disengagement position where a rotation operation around the shaft axis is not necessary for the axial movement of the plunger,
In addition, when the female screw portion engages with the male screw portion, the block has an axial direction with respect to the main body side within a range in which the elastic body can be elastically deformed so as to cancel any meshing. A syringe operating device characterized by being displaceable. The main body portion includes a storage cylinder portion through which at least the first half side including the male screw portion of the shaft is inserted so as to be movable in the axial direction, and an opening portion is provided in the middle of the storage cylinder portion to make the block appear and disappear.
The syringe operating device according to claim 1, wherein the block is supported so as to be movable between the engagement position and the disengagement position in a state of being sandwiched between the elastic bodies from the front and rear of the opening. The lock mechanism includes a lever that moves the block to the engagement position and the disengagement position,
The lever has an eccentric shaft supported at a position eccentric from the rotation center thereof, and the block is provided with a cam groove through which the eccentric shaft can be pushed and pulled,
When the lever is in the initial position, the eccentric shaft engages with one end of the cam groove to hold the block at the disengaged position, and when the lever is rotated by a predetermined angle, the eccentric shaft is 3. The block is moved from the disengagement position to the engagement position while relatively moving from one end side to the other end side of the cam groove, and then held in the engagement position. Syringe operating device according to.   The block has one end side higher than the other end side on both sides of the arc-shaped cross section of the female threaded portion, and the male threaded portion engages with the male threaded portion first when the female threaded portion engages with the male threaded portion. The syringe operating device according to claim 1, wherein the syringe operating device has a shape that engages with a screw portion.   The movable part has a handle integrally fixed to the base end of the shaft, and is fitted on the front side of the handle so as to be rotatable relative to the shaft, and the movement in the axial direction is fixed. The syringe operating device according to claim 1, 2, 3, or 4, comprising a holder for assembling a base end of the plunger. The main body is provided with a joint that communicates with the distal end of the outer cylinder of the syringe and can be connected to the connection destination.
The joint portion includes a delivery path through which a fluid delivered from the syringe passes through the operation of the movable part, and a release path for branching from the delivery path to release excess pressure,
The release path is provided with a pressure adjustment valve for releasing the amount exceeding the predetermined pressure value to the outside when the movable part is operated exceeding the predetermined pressure value. The syringe operating device according to claim 1, 2, 3, 4 or 5. The pressure regulating valve is provided with a tank that receives fluid in excess of the predetermined pressure value and is pre-filled with air,
The said tank was equipped with the discharge part which discharge | releases only the air equivalent to the quantity of this fluid outside when the fluid of the amount exceeding the said predetermined pressure value is received. Syringe operation device. The fluid delivered from the syringe is a liquid,
The syringe operating device according to claim 7, wherein the discharge unit includes a waterproof ventilation sheet.

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