Wire Feeding Device

Abstract

The purpose of the present invention is to make it possible to suitably set the amount of movement of a wire and feed the wire with a suitable force. A wire feeding device 1 comprises: a grip part 20 capable of gripping a wire, releasing the wire, and moving in front-end and rear-end directions; a compression spring 12 capable of biasing the grip part 20 in the front-end direction; and a slider 13 and a hook 14 for causing the compression spring 12 to deform and increasing the biasing force in the front-end direction. When the deformation of the compression spring 12 due to the slider 13 and the hook 14 is released, the wire gripped by the grip part 20 is fed in the front-end direction by the biasing force of the compression spring 12. The wire feeding device 1 is capable of operating in a first mode in which the feeding of the wire in the front-end direction is performed continuously in response to a first prescribed operation, and a second mode in which the feeding of the wire in the front-end direction is performed once in response to a second prescribed operation.

Description

[Technical field]

[0001] The present invention relates to a wire delivery device that delivers a wire. [Background technology]

[0002] When removing an obstruction that blocks a blood vessel, such as a chronic total occlusion (CTO), to improve blood flow, for example, a soft guidewire is used to try to penetrate the obstruction, and if the obstruction cannot be penetrated, the guidewire is gradually replaced with a harder antegrade guidewire.

[0003] In this method, it is time-consuming to replace the guidewire, and the use of multiple guidewires is costly.

[0004] Furthermore, when penetrating an obstruction with a guidewire, the operator must grip and manipulate the guidewire with his or her hand, and therefore the distance the guidewire is advanced is determined by the operator's sense.

[0005] In response to this, for example, the technique described in Patent Document 1 is known as a technique that can feed out the medical wire at a predetermined movement amount and can transmit the pressing force of the medical wire well. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2016-202711 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the technology described in Patent Document 1, the operator pushes the spring to deliver the medical wire. Therefore, the pressing force on the medical wire is relatively limited and may not be sufficient to make the medical wire penetrate the obstruction, and it becomes necessary to replace the medical wire in order to penetrate the obstruction. Therefore, the problem of the labor required to replace the medical wire and the cost required to use multiple medical wires cannot be solved.

[0008] Furthermore, in the technology of Patent Document 1, when the gripping member that holds the medical wire moves toward the tip side beyond a predetermined amount of movement, the gripping member disengages from the engaging member that maintains the gripped state of the medical wire, thereby preventing the amount of movement of the medical wire from exceeding a predetermined amount of movement. However, there is a risk that the amount of movement of the medical wire will vary depending on the timing at which the engagement between the engaging member and the gripping member is released.

[0009] The present invention has been made based on the above circumstances, and its object is to make it possible to adjust the amount of wire movement to an appropriate amount and to deliver the wire with an appropriate force. [Means for solving the problem]

[0010] In order to achieve this object, a wire feeding device according to a first aspect is a wire feeding device that feeds out a wire in a distal direction, and comprises a holding portion that is able to grip and release the wire and that is able to move in the distal direction and rearward directions, an elastic body that is able to urge the holding portion in the distal direction, and a biasing portion that deforms the elastic body to increase the biasing force in the distal direction, and when the deformation of the elastic body by the biasing portion is released, the wire held by the holding portion is fed in the distal direction by the biasing force of the elastic body, and is operable in a first mode in which the wire is continuously fed in the distal direction in response to a first specified operation, and a second mode in which the wire is fed once in the distal direction in response to a second specified operation.

[0011] In the above-mentioned wire feeding device, in the first mode, a series of operations are repeatedly executed in the order of (a), (b) and (c) below in response to the first specified operation: (a) gripping of the wire by the gripping portion and deformation of the elastic body by the biasing portion, (b) release of deformation of the elastic body and feeding of the wire toward the tip side of the gripping portion gripping the wire by the biasing force of the elastic body, and (c) release of grip of the wire by the gripping portion and movement toward the rear end side of the gripping portion. In the second mode, after executing (a), (b) may be executed in response to the second specified operation.

[0012] The wire feeding device may further include an operation unit capable of switching between the first mode and the second mode.

[0013] The wire feeding device may further include a deformation maintaining unit capable of maintaining a deformed state of the elastic body that has been brought to a predetermined state by an increase in the biasing force of the biasing unit, and a maintenance state changing unit capable of changing a state in which the deformation state of the elastic body cannot be maintained by the deformation maintaining unit, wherein the operation unit is capable of setting the maintenance state changing unit to a state in which the deformation state of the elastic body cannot be maintained by the deformation maintaining unit, and when the deformation maintaining unit maintains the deformation state of the elastic body that has been brought to a predetermined state by an increase in the biasing force of the biasing unit, when the maintenance state changing unit changes to a state in which the deformation state of the elastic body cannot be maintained by the deformation maintaining unit by an operation on the operation unit, the biasing force of the elastic body that has become unable to maintain the deformation state may move the holding unit in the distal direction, and the wire held by the holding unit may be fed out in the distal direction.

[0014] In the above-mentioned wire feeding device, the operation unit may be operable in the first mode by operating the maintenance state change unit to a state in which the deformation maintenance unit is unable to maintain the deformation state of the elastic body, and maintaining the state in which the maintenance state change unit is operated to a state in which the deformation maintenance unit is unable to maintain the deformation state of the elastic body.

[0015] The wire feeding device may further include an operation fixing unit capable of fixing the operation unit in a state in which the maintenance state changing unit is operated to a state in which the deformation maintenance unit cannot maintain the deformation state of the elastic body.

[0016] The wire feeding device may further include a gripping operation unit capable of manipulating a state in which the wire is gripped by the gripping unit.

[0017] A wire feeding device according to a second aspect is a wire feeding device that feeds out a wire in a distal direction, and comprises a gripping portion capable of gripping and releasing the wire and moving in the distal direction and rearward directions, an elastic body capable of urging the gripping portion in the distal direction, a biasing portion that deforms the elastic body to increase the biasing force in the distal direction, and a release portion that releases the deformed state of the elastic body whose biasing force has been increased by the biasing portion, wherein the gripping portion is moved in the distal direction by the biasing force of the elastic body whose deformation state has been released by the release portion, and the wire gripped by the gripping portion is fed out in the distal direction, and further comprises a gripping operation portion capable of operating the state of gripping of the wire by the gripping portion.

[0018] In the above-mentioned wire feeding device, the release section has a deformation maintaining section capable of maintaining the deformed state of the elastic body, which has been brought to a predetermined state by increasing the biasing force of the biasing section, and a maintenance state changing section capable of changing the state to one in which the deformation state of the elastic body cannot be maintained by the deformation maintaining section, and the gripping operation section may be capable of operating the gripping section, which grips the wire, to a released gripping state when the deformation state of the elastic body is maintained by the deformation maintaining section.

[0019] The wire feeding device may further include a striking portion that is arranged on a base end side of the gripping portion, is movable in an axial direction of the wire, and is movable toward and away from the gripping portion.

[0020] In the above wire feeding device, the gripping portion may have a first clamping portion and a second clamping portion that clamp the wire, and a cam portion that can adjust the distance between the first clamping portion and the second clamping portion.

[0021] The wire feeding device may further include a mounting section on which a wire to be held by the gripping section can be placed, the entire surface of which is open in a predetermined direction along the longitudinal direction of the placed wire, and an opening / closing section capable of opening and closing at least a portion of the open surface in the predetermined direction of the mounting section.

[0022] The wire feeding device may further include a biasing operation unit that is manually operated by an operator to increase the biasing force applied to the elastic body by the biasing unit, and the biasing operation unit may have a handle portion that is manually operated by the operator during operation at a position offset away from the position where the wire is placed. Effect of the Invention

[0023] According to the present invention, the amount of movement of the wire can be set to an appropriate amount, and the wire can be delivered with an appropriate force. [Brief description of the drawings]

[0024] [Figure 1] 1A and 1B are diagrams illustrating a guidewire and a catheter connected to a wire delivery device, and a connector for connecting to the wire delivery device. [Diagram 2] 13A and 13B are diagrams showing a connection state between a guidewire and a catheter and a connector. [Diagram 3] 1 is a perspective view of a wire feeding device according to a first embodiment. FIG. [Figure 4] FIG. 1 is a perspective view of a wire delivery device with a guidewire and a catheter connected thereto. [Diagram 5] 4 is a top cross-sectional view of the wire feeding device shown in FIG. 3 in an initial state. [Figure 6] FIG. 4 is a configuration diagram of a gripper of the wire feeding device. [Figure 7] 6 is a perspective cross-sectional view from the bottom in the initial state shown in FIG. 5. [Figure 8] FIG. 4 is a perspective view of a firing switch of the wire feeding device. [Figure 9]FIG. 4 is a perspective view of a slider of the wire feeding device. [Figure 10] FIG. 2 is a perspective view of a hook of the wire delivery device. [Figure 11] FIG. 4 is a top cross-sectional view of the wire feeding device in a gripping preparation state. [Figure 12] FIG. 2 is a cross-sectional top view of the wire feeding device in a ready-to-feed state. [Figure 13] 13 is a perspective cross-sectional view from the bottom in the deliverable state shown in FIG. 12. FIG. [Figure 14] FIG. 4 is a bottom cross-sectional view of the wire feeding device during feeding. [Figure 15] 15 is a top cross-sectional view of the state shown in FIG. 14 during delivery. [Figure 16] 11 is a side cross-sectional view of the gripping open / close switch of the wire feeding device when not in operation. FIG. [Figure 17] 17 is a top cross-sectional view of the grip open / close switch shown in FIG. 16 during operation. FIG. [Figure 18] 18 is a side cross-sectional view of the state shown in FIG. 17 during the operation. [Figure 19] 13 is a side cross-sectional view of a grip open-close switch according to a modified example when not in operation. FIG. [Figure 20] 20 is a side cross-sectional view of the grip open / close switch shown in FIG. 19 when it is operated. [Figure 21] FIG. 11 is a top cross-sectional view of a wire feeding device according to a second embodiment in an initial state. [Figure 22] 22 is a perspective cross-sectional view from the bottom in the initial state shown in FIG. 21. [Figure 23] FIG. 4 is a perspective view of a firing switch of the wire feeding device. [Figure 24] FIG. 2 is a first perspective view of a slider of the wire delivery device. [Diagram 25] FIG. 25 is a second perspective view of the slider shown in FIG. 24. [Figure 26] FIG. 2 is a cross-sectional top view of the wire feeding device in a ready-to-feed state. [Figure 27] 27 is a perspective cross-sectional view from the bottom in the deliverable state shown in FIG. 26. FIG. [Figure 28]FIG. 2 is a bottom perspective view of the wire feeding device during feeding. [Figure 29] FIG. 11 is a side cross-sectional view of the wire feeding device after feeding. [Diagram 30] FIG. 11 is a top cross-sectional view of a wire feeding device according to a third embodiment in an initial state. [Diagram 31] FIG. 31 is a side cross-sectional view of the initial state shown in FIG. 30. [Diagram 32] 31 is an exploded perspective view of a gripping portion of the wire feeding device shown in FIG. 30. [Diagram 33] 33 is a perspective view of the gripping portion shown in FIG. 32 in a released state. FIG. [Diagram 34] FIG. 34 is a side cross-sectional view of the grip released state shown in FIG. 33. [Diagram 35] FIG. [Diagram 36] 11 is a side cross-sectional view of the gripping portion in a gripping state. FIG. [Figure 37] 31 is a perspective view of a gripping open / close switch of the wire feeding device shown in FIG. 30. FIG. [Figure 38] FIG. 2 is a cross-sectional top view of the wire feeding device in a ready-to-feed state. [Figure 39] FIG. 39 is a side cross-sectional view of the deliverable state shown in FIG. 38. [Diagram 40] FIG. 13 is an exploded perspective view of a grip portion according to a modified example. [Diagram 41] 33 is a perspective view of the gripping portion shown in FIG. 32 in a released state. FIG. [Diagram 42] FIG. 11 is a top view of the wire feeding device according to the fourth embodiment with the cover open. [Diagram 43] 43 is a top cross-sectional view of the state shown in FIG. 42 when the lid is open. [Diagram 44] FIG. [Diagram 45] FIG. [Figure 46] FIG. 4 is an enlarged perspective view of the mounting portion of the lid. [Figure 47] FIG. 2 is a top view showing a state in which a guidewire is placed on the wire delivery device. [Figure 48]1 is a side cross-sectional view of a portion of a wire delivery device including a guidewire receiving portion. [Figure 49] FIG. 2 is a perspective view of the wire delivery device in a guidewire delivery ready state. [Figure 50] FIG. 13 is a perspective view of a wire feeding device according to a fifth embodiment. [Figure 51] 51 is a bottom perspective cross-sectional view of the wire feeding device shown in FIG. 50 with the injection switch not fixed. FIG. [Figure 52] 52 is a perspective cross-sectional view from the bottom of the ejection switch shown in FIG. 51 when fixed. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] A wire feeding device according to an embodiment will be described with reference to the drawings, but the present invention is not limited to the embodiment described in the drawings.

[0026] In this specification, the term "guidewire" refers to a medical guidewire that is advanced to a surgical site in a body cavity such as a blood vessel and is used to guide a catheter to the surgical site.

[0027] In this specification, "distal side" and "distal direction" refer to the side and direction along the longitudinal direction of the guidewire (the direction along the axial direction of the guidewire) where an obstruction to be penetrated by the guidewire is located. "Rear end side" and "rear end direction" refer to the opposite side and direction of the distal end. "Proximal end side" refers to the direction along the longitudinal direction of the guidewire, the direction opposite the distal end. "Distal end" refers to the distal end of any member or part, and "proximal end" refers to the proximal end of any member or part.

[0028] [First embodiment] The wire delivery device 1 (see FIG. 3) according to the first embodiment is a device that delivers a guidewire, which is an example of a wire. The guidewire is used to be pushed forward to an operation site in a body cavity, such as a blood vessel, and to penetrate an obstruction at the operation site. The wire delivery device 1 is used by connecting a catheter into which a guidewire GW is inserted to the device.

[0029] Before describing the details of the wire delivery device 1, we will explain the guidewire and catheter connected to the wire delivery device 1. Figure 1 is a diagram explaining the guidewire and catheter connected to the wire delivery device 1 and a connector for connecting to the wire delivery device, and Figure 2 is a diagram showing the connection state of the guidewire and catheter and the connector.

[0030] The guidewire GW is inserted into a hollow catheter 51. A catheter hub 52 for adjusting the direction of the catheter 51 is non-rotatably attached to the base end side of the catheter 51. In the example of Fig. 1(A), the left side of the drawing is the inside of the patient's body (the tip side), and the right side of the drawing is the outside of the patient's body (the base end side).

[0031] The catheter 51 is connected to a connector 60 as shown in FIG. 2, and is connected to the wire delivery device 1 via the connector 60. The connector 60 has a dial portion 60A, an attachment portion 60C, and a rear end portion 60D as shown in FIG. 1(B). The dial portion 60A is a portion for an operator to operate the direction of the catheter 51 connected to the connector 60. The attachment portion 60C is formed in a cylindrical shape and is a portion for attachment to a connector connection portion 3 (see FIG. 3) of the wire delivery device 1, which will be described later. The axial length of the attachment portion 60C is approximately the same as the width in the X-axis direction of connection pieces 3A and 3B of the connector connection portion 3, which will be described later. The rear end portion 60D is formed in a disk shape with a diameter larger than that of the cylinder of the attachment portion 60C. The rear end portion 60D acts to position the connector 60 in the X-axis direction with respect to the connector connection portion 3.

[0032] A through hole 60B extending in the longitudinal direction is formed in the connector 60. The through hole 60B is configured to engage with the rear end portion 52A of the catheter hub 52. When the rear end portion 52A of the catheter hub 52 is engaged with the through hole 60B, the catheter hub 52 and the connector 60 are coupled and become capable of rotating together.

[0033] Fig. 3 is a perspective view of the wire delivery device, and Fig. 4 is a perspective view of the wire delivery device to which a guidewire and a catheter are connected. The wire delivery device 1 comprises a housing 2, a lever 31, a connector connection portion 3, a guidewire housing portion 4, and a grip portion 20.

[0034] The housing 2 has a substantially rectangular parallelepiped shape with its axial direction (X-axis direction in the drawing) being the longitudinal direction when the guidewire GW is attached. In addition to the gripping portion 20, the housing 2 includes various configurations described later for gripping and delivering the guidewire GW. The lever 31 is rotatable about a lever rotation axis 31O (see FIG. 5) described later, and is a part (first predetermined operation portion) that the operator operates when delivering the guidewire GW. In this embodiment, the operator can deliver the guidewire GW by gripping and rotating the lever 31 with one hand.

[0035] The connector connection part 3 is a part for connecting the mounting part 60C, and has a pair of connection pieces 3A, 3B extending in the X-axis direction. The connection pieces 3A, 3B are made of an elastic body such as resin, and sandwich the outer peripheral surface of the mounting part 60C from both sides in the Y-axis direction to rotatably connect the connector 60. The guidewire accommodating part 4 is a part for accommodating the guidewire GW to be delivered, and extends in the X-axis direction, and is formed in a concave shape with the positive direction of the Z-axis open over the entire X-axis direction. The gripping part 20 is a part capable of gripping the guidewire GW and moving in the X-axis direction, and is disposed in the middle part of the guidewire accommodating part 4 in the X-axis direction, and gripping surface parts 21A and 22A (see FIG. 6) described later are open to the outside. In this embodiment, when the guidewire GW is placed on the surface (here also referred to as the bottom surface) in the negative direction of the Z axis of the guidewire accommodating section 4, the guidewire GW is arranged in the gap (arrangement space) between the gripping surfaces 21A and 22A that hold the guidewire GW.

[0036] When connecting the catheter 51 and the guidewire GW to the wire delivery device 1, the guidewire GW at the proximal end side from the connector 60 is placed on the bottom surface of the recessed portion of the guidewire housing 4, and the attachment portion 60C connected to the catheter 51 into which the guidewire GW is inserted is fitted into the connection pieces 3A and 3B to be attached. When the catheter 51 and the guidewire GW are connected to the wire delivery device 1 in this way, the state is as shown in FIG. 4. In this state, when the catheter 51 and the guidewire GW are connected to the wire delivery device 1, the operator can easily adjust the direction of the catheter 51 by rotating the operation dial 60A (see FIG. 1). In this state, a gap is secured between the surface of the rear end portion 60D on the negative side of the X-axis (the direction opposite to the direction of the arrow on the X-axis) and the surface of the housing 2 on the positive side of the X-axis, so that liquids such as blood and medicinal liquids that have passed through the catheter 51 easily flow down through the gap, and the configuration on the housing 2 side can be appropriately prevented from coming into contact with the liquid. Furthermore, when the lever 31 is in the initial state, the guidewire GW is not gripped as described below, so that the position and orientation of the guidewire GW can be adjusted by moving and rotating the guidewire GW back and forth.

[0037] Next, wire feeding device 1 will be described in detail. Fig. 5 is a top cross-sectional view of the wire feeding device 1 in its initial state. Wire feeding device 1 includes a housing, a gripper, a compression spring, a return spring (see Fig. 11), a slider, a hook, a grip open / close switch, and an ejection switch, and Fig. 6 is a configuration diagram of the gripper. Fig. 7 is a bottom perspective view of wire feeding device 1 in its initial state. Fig. 8 is a perspective view of the ejection switch, Fig. 9 is a perspective view of the slider, and Fig. 10 is a perspective view of the hook. Fig. 7 shows a state in which a part of the housing on the negative side of the Z axis has been removed from wire feeding device 1, and a similar state may be shown in the bottom perspective views of other figures in this specification.

[0038] The wire feeding device 1 includes a housing 2, a gripping portion 20, a compression spring 12, a return spring 16 (see FIG. 11), a slider 13, a hook 14, a gripping open / close switch 40, and an ejection switch 45. As shown in FIG. 5, the wire feeding device 1 preferably further includes a hammer 11. The compression spring 12 is an example of an elastic body. The slider 13 and the hook 14 are an example of a biasing portion. The hammer 11 is an example of a striking portion. As shown in FIG. 7, the wire feeding device 1 further includes a lever 31, links 35 and 37, and joints 36 and 38. Here, the lever 31, the links 35, 37, the joints 36, 38, and the slider 13 are an example of a power transmission mechanism, the slider 13, the hook 14, and the ejection switch 45 are an example of a deformation maintaining unit, the ejection switch 45 is an example of a maintaining state changing unit and an operating unit, and is also an example of a second predetermined operating unit. The grip opening / closing switch 40 is an example of a grip operating unit. The slider 13, the hook 14, and the ejection switch 45 are an example of a release unit.

[0039] The housing 2 has a generally rectangular parallelepiped shape extending in the axial direction (X-axis direction in the drawing) of the guidewire GW when it is attached. As shown in Fig. 5, the housing 2 is formed with a gripping portion accommodating portion 2A that accommodates the gripping portion 20 movably in the X-axis direction, and a slider accommodating portion 2B that accommodates the slider 13 and the hook 14 movably in the X-axis direction. The housing 2 is further formed with a support hole 2C that rotatably supports a cylindrical portion 35A on one end side of the link 35.

[0040] The gripping portion 20 capable of gripping the guidewire GW is movable in the X-axis direction in the gripping portion housing portion 2A. As shown in FIG. 6, the gripping portion 20 has a first part 21, a second part 22, and a gripping spring 23. The first part 21 has, for example, a gripping surface portion 21A formed extending in the X-axis direction, and a substantially cylindrical leg portion 21B extending in the Y-axis direction. The second part 22 has a gripping surface portion 22A formed extending in the X-axis direction and having a surface facing the gripping surface portion 21A of the first part 21, a recessed portion 22B having recesses facing both directions in the Z-axis direction, and a through hole portion 22C having a through hole into which the leg portion 21B can be inserted.

[0041] The first part 21 and the second part 22 are assembled with the leg part 21B inserted into the through hole of the through hole part 22C. The gripping spring 23 is attached so that a biasing force is generated between the leg part 21B and the second part 22, and the biasing force of the gripping spring 23 acts to bring the surface (gripping surface) of the gripping surface part 21A of the first part 21 on the second part 22 side closer to the surface (gripping surface) of the gripping surface part 22A of the second part 22 on the first part 21 side.

[0042] In this embodiment, the guidewire GW can be placed in a gap (arrangement space) between the gripping surface of the gripping surface portion 21A on the second component 22 side and the gripping surface of the gripping surface portion 22A on the first component 21 side, and the gripping portion 20 can grip the guidewire GW by the biasing force of the gripping spring 23. This arrangement space can be opened to the outside by an opening extending over the entire movable direction of the gripping portion 20. In this embodiment, by placing the guidewire GW in the recessed portion of the guidewire accommodating portion 4, the guidewire GW can be positioned approximately in the center in the Z-axis direction between the gripping surface of the gripping surface portion 21A and the gripping surface of the gripping surface portion 22A. On the other hand, when leg portion 21B is pressed toward first part 21 (negative side of the Y-axis) and gripping spring 23 is compressed, the gripping surface of gripping surface portion 21A and the gripping surface of gripping surface portion 22A separate to create a space, so that guidewire GW is no longer gripped by gripping portion 20 (gripping released).

[0043] The concave portion 22B engages with a protrusion (not shown) formed on both wall portions in the Z-axis direction of the grip portion accommodating portion 2A of the housing 2 and extending in the X-axis direction, and acts to accurately guide the movement of the grip portion 20 in the X-axis direction.

[0044] As shown in FIG. 8, the ejection switch 45 has a protrusion 45A, an extension piece 45B, a protrusion 45C, a fixing hole 45D, and a spring accommodating portion 45E. The protrusion 45A can contact the protrusion 14B (see FIG. 10 and FIG. 13) of the hook 14 by rotating the ejection switch 45, and can push up the protrusion 14B. The extension piece 45B is formed extending in the positive direction of the Y axis. The protrusion 45C is formed at the tip of the extension piece 45B in the positive direction of the Y axis, and protrudes in the negative direction of the Z axis. The protrusion 45C can engage with the protrusion 13B (see FIG. 9 and FIG. 13) of the slider 13, and can limit the movement of the slider 13 in the X-axis direction. The fixing hole 45D is a hole into which a screw 46 is inserted for fixing the ejection switch 45 to the housing 2 so as to be rotatable. The ejection switch 45 is fixed to the housing 2 by the screw 46, and is thereby rotatable about the fixing hole 45D. A spring (not shown) that biases the ejection switch 45 in the negative direction of the Y axis is accommodated in the spring accommodating portion 45E. Note that, instead of using a spring, the ejection switch 45 itself may be configured to have elasticity and be biased in the negative direction of the Y axis.

[0045] As shown in FIG. 9, the slider 13 has an extension 13A extending in the positive direction of the X-axis, a protrusion 13B engageable with the extension piece 45B and the protrusion 45C, and an attachment 13C to which the hook 14 can be attached. The extension 13A has a plate-like shape with a surface on the negative side of the Y-axis at the tip side in the X-axis direction that has an inclination such that the thickness becomes thinner toward the tip side. As shown in FIG. 5, when the tip part of the extension 13A is moved toward the tip side in the X-axis direction, the extension 13A presses the leg 21B of the gripping part 20 toward the negative side of the Y-axis, compressing the gripping spring 23 and moving the leg 21B in the negative direction of the Y-axis. As a result, the surface of the gripping surface 21A on the second component 22 side and the surface of the gripping surface 22A on the first component 21 side are separated, and the grip of the guidewire GW is released.

[0046] The hook 14 is attached to the attachment portion 13C of the slider. As shown in FIG. 10, the hook 14 has a spring hook 14A and a protrusion 14B. The spring hook 14A can engage with the protrusion 11A of the hammer 11. The protrusion 14B is a portion that comes into contact with the protrusion 45A of the ejection switch 45. When the protrusion 14B is pressed in the positive direction of the Y axis by the protrusion 45A, the hook 14 is elastically deformed, and the spring hook 14A is moved in the same direction. In this embodiment, the slider 13 and the hook 14 are configured as separate bodies, but they may be configured as one body.

[0047] As shown in FIG. 5, at the base end side of the gripping portion 20 in the X-axis direction, the hammer 11 is arranged with its longitudinal direction in the X-axis direction, and around the base end portion of the hammer 11 and at the base end side of the hammer 11, the compression spring 12 is arranged with its longitudinal direction in the X-axis direction.

[0048] Hammer 11 is made of, for example, metal and is movable in the X-axis direction. Hammer 11 has a protrusion 11A formed on the slider accommodating portion 2B side. Protrusion 11A is capable of engaging with spring hook 14A. Compressor spring 12 is, for example, a metal spring, is capable of deformation (compression) in the X-axis direction, and is capable of applying a biasing force to hammer 11 in the positive direction of the X-axis.

[0049] The return spring 16 is, for example, a metal spring, is deformable (compressible) in the X-axis direction, and biases the grip portion 20 toward the base end. The biasing force of the return spring 16 on the grip portion 20 is smaller than the biasing force on the grip portion 20 in the initial state of the compression spring 12 (a state in which compression due to the movement of the hammer 11 has not occurred). As a result, when the compression spring 12 is in the initial state, the grip portion 20 is located at the most extreme position of the movable range (the most extreme position in the X-axis direction in the grip portion accommodating section 2A), and when the compression spring 12 is compressed and no longer applies a biasing force to the grip portion 20, the biasing force of the return spring 16 positions the grip portion 20 at the most extreme position of the movable range (the most extreme position in the X-axis direction in the grip portion accommodating section 2A).

[0050] In the wire feeding device 1, the lever 31, the links 35, 37, the joints 36, 38, and the slider 13 form a power transmission mechanism.

[0051] Lever 31 is a part that is manually rotated by an operator using wire feeding device 1. Lever 31 is rotatable about lever rotation axis 31O. As shown in FIG. 7, lever 31 and cylindrical portion 35A of link 35 are connected via a joint (not shown) so that a rotational force can be transmitted from lever 31 to link 35. In this embodiment, link 35 is configured to rotate integrally with the rotation of lever 31.

[0052] The other end of link 35 and one end of link 37 are rotatably connected via joint 36. The other end of link 37 and slider 13 are rotatably connected via joint 38. Slider 13 is capable of linear movement in the X-axis direction.

[0053] According to this power transmission mechanism, when the lever 31 is rotated in the R1 direction, the link 35 rotates in the R2 direction, and as the link 35 rotates, the link 37 moves in conjunction with the movement of the slider 13 along the X-axis. In this embodiment, the power transmission mechanism adjusts the rotation angle of the lever 31 and the lengths of the links 35 and 37 so that the slider 13 can move over the entire movement range in the X-axis direction within the rotatable range of the lever 31.

[0054] When the slider 13 moves from the most distal position in the X-axis direction of its movement range to the base end side, the spring hook 14A engages with the convex portion 11A of the hammer 11, and when it moves further, it moves the hammer 11 to the base end side and compresses the compression spring 12. When the slider 13 approaches the rearmost position, the convex portion 45C of the extension piece 45B of the ejection switch 45 passes over the convex portion 13B of the slider 13 in the positive direction of the X-axis and they engage with each other. As a result, the slider 13 cannot move in the positive direction of the X-axis with the compression spring 12 compressed. After this, when the ejection switch 45 is pressed in the positive direction of the Y-axis, the convex portion 45A presses the convex portion 14B of the hook 14 in the positive direction of the Y-axis, and the portion of the hook 14 on the positive side of the X-axis is deformed in the positive direction of the Y-axis, and the engagement between the spring hook 14A of the hook 14 and the convex portion 11A of the hammer 11 is released. As a result, the compression spring 12 is suddenly released from its deformed state (compressed state), and the compression spring 12 presses the hammer 11 in the X-axis direction.

[0055] Next, the method of use and operation of the wire feeding device 1 will be specifically described with reference to the drawings. Fig. 11 is a top cross-sectional view of the wire feeding device in a gripping preparation state, Figs. 12 and 13 are top cross-sectional views and bottom perspective views in a feedable state, and Figs. 14 and 15 are bottom and top cross-sectional views during feeding. The wire feeding device 1 is configured such that the gripping portion 20, hammer 11, slider 13, and hook 14 are interlocked to perform the following operations in this order: (a) gripping the guidewire GW, (b) moving the gripping portion 20 toward the tip end of the guidewire GW, and (c) releasing the gripping of the guidewire GW and moving the gripping portion 20 toward the rear end.

[0056] First, the operator inserts the guidewire GW into a blood vessel, and then pushes the guidewire GW along the blood vessel to the occlusion site. Next, after the tip of the guidewire GW reaches the occlusion site, the operator pushes the catheter 51 to the occlusion site using the guidewire GW as a guide. Next, the operator connects the connector 60 to the catheter hub 52 of the catheter 51, and while pushing the connector 60 into the connector connection portion 3 of the wire delivery device 1 from the positive direction of the Z axis, the operator accommodates the base end side of the guidewire GW in the guidewire accommodation portion 4 of the housing 2 from the positive side of the Z axis, and connects the connector 60 to the wire delivery device 1.

[0057] 5, the leg 21B is pressed in the negative direction of the Y axis by the extension 13A and the gripping spring 23 is compressed, so that the surface of the gripping surface 21A on the second component 22 side and the surface of the gripping surface 22A on the first component 21 side are separated, forming an arrangement space, and the grip of the guidewire GW by the gripping portion 20 is released. Therefore, as described above, by mounting the catheter 51 with the guidewire GW inserted therein to the wire delivery device 1, the guidewire GW can be easily accommodated in the arrangement space. This makes it possible to shorten the preparation time for delivering the guidewire GW by the wire delivery device 1 and reduce the burden on the patient and the operator.

[0058] Next, when the lever 31 is rotated slightly in the R1 direction in FIG. 7, the slider 13 and the hook 14 slide toward the base end. As shown in FIG. 11, since the protrusion 11A of the hammer 11 is engaged with the spring hook 14A, the hammer 11 moves toward the base end in conjunction with the movement of the slider 13, and the compression spring 12 is compressed.

[0059] At this time, the gripping portion 20 is no longer pushed in the positive direction of the X-axis by the hammer 11, and therefore the gripping portion 20 slides to the rear end of its movable range by the biasing force of the return spring 16. As a result, the gripping portion 20 moves a distance D from the forefront (initial position) of its movable range to the rear end of its movable range, as shown in FIG. 11. This distance D corresponds to the amount of wire delivered by the wire delivery device 1 in one go. For example, if the amount of wire delivered by the wire delivery device 1 in one go is 2 mm, the wire will slide 2 mm toward the rear end from the initial position. At this time, the extension portion 13A is configured to be in a position that compresses the gripping spring 23 of the gripping portion 20, and therefore the gripping portion 20 remains in a state where it is not gripping the guidewire GW.

[0060] Furthermore, when the lever 31 is rotated in the R1 direction, the slider 13 and the hook 14 slide further toward the base end, and the spring hook 14A remains engaged with the convex portion 11A of the hammer 11. As the slider 13 and the hook 14 move, the hammer 11 moves toward the base end, and the compression spring 12 is further compressed.

[0061] At this time, the extension portion 13A is no longer in contact with the leg portion 21B and no longer compresses the gripping spring 23, and the guidewire GW is gripped between the surface of the gripping surface portion 21A facing the second part 22 and the surface of the gripping surface portion 22A facing the first part 21.

[0062] Furthermore, when the lever 31 is rotated to a position (dischargeable position) at which the slider 13 is at the base end of its range of movement, the slider 13 and the hook 14 slide further toward the base end, and as shown in Figures 12 and 13, the convex portion 45C of the injection switch 45 climbs over the convex portion 13B of the slider 13 and is positioned in the positive direction of the X-axis of the convex portion 13B, and they engage with each other. This makes it impossible for the slider 13 to move in the positive direction of the X-axis, and the compression spring 12 is maintained in a compressed state, resulting in a state in which delivery is possible (compression maintained state: delivery possible state).

[0063] Thereafter, when the operator presses the ejection switch 45 in the positive direction of the Y-axis, as shown in Fig. 14, the protrusion 45A presses the protrusion 14B in the positive direction of the Y-axis, the part of the hook 14 on the positive side of the X-axis is bent in the positive direction of the Y-axis, and the spring hook 14A moves in the positive direction of the Y-axis as shown in Fig. 15, and the state in which the spring hook 14A is engaged with the protrusion 11A of the hammer 11 is released. Also, the protrusion 45C of the extension piece 45B moves in the positive direction beyond the surface of the slider 13 in the positive direction of the Y-axis and is no longer engaged with the protrusion 13B, and the slider 13 becomes movable in the positive direction of the X-axis.

[0064] As a result, the biasing force of the compression spring 12 is all at once applied to moving the hammer 11 in the tip direction, causing the hammer 11 to move in the tip direction and causing the tip side of the hammer 11 to collide with the base end side of the grip portion 20.

[0065] As a result, the gripping portion 20 gripping the guidewire GW moves toward the tip due to the impact of the collision with the hammer 11, and stops at the most distal position of the gripping portion 20. At this time, the extension portion 13A of the slider 13 is not in contact with the gripping portion 20, so the gripping state of the guidewire GW is maintained.

[0066] Therefore, the gripping portion 20 moves from the rearmost end position to the foremost end position while maintaining the state of gripping the guidewire GW. As a result, the guidewire GW is delivered to the distal end side by a distance D from the rearmost end position to the foremost end position of the gripping portion 20.

[0067] Thereafter, when the operator rotates the lever 31 in the direction opposite to R1, the slider 13 and the hook 14 move in the positive direction of the X-axis, and the wire delivery device 1 can be returned to the initial state shown in Fig. 5. The operations up to this point correspond to the operation of the single-shot mode (second mode) in which the wire is delivered once. In the single-shot mode, (a) the guidewire GW is gripped by the gripping portion 20, and the compression spring 12 is deformed by the slider 13 and the hook 14, and then the ejection switch 45 is pressed, (b) the deformation of the compression spring 12 is released and energized, thereby delivering the gripping portion 20 gripping the guidewire GW toward the tip side, and then (c) the gripping is released, and the guidewire GW can be delivered.

[0068] When it is necessary to continuously deliver the guidewire GW, the lever 31 may be rotated continuously to perform the same operation (first mode). By keeping the ejection switch 45 pressed, the wire delivery device 1 can be operated in the continuous mode. When the ejection switch 45 is kept pressed to set the continuous mode, the operator operates the lever 31 and compresses the compression spring 12. Since the convex portion 45A of the ejection switch 45 is in a state of pressing the convex portion 14B, the spring hook 14A of the hook 14 is disengaged from the convex portion 11A of the hammer 11, and the hammer 11 collides with the gripping portion 220. As a result, the guidewire GW can be delivered in the distal direction. After that, the operator operates the lever 31 continuously to continuously deliver the guidewire GW to the distal side (first mode). That is, it is possible to repeat a series of operations in the order of (a), (b), and (c) described above.

[0069] In this way, the wire feeding device 1 can feed out an appropriate amount of the guidewire GW by applying an impact force due to the biasing force accumulated in the compression spring 12 to the guidewire GW. Since an impact force can be applied to the guidewire GW in this way, the guidewire GW can effectively penetrate the obstruction.

[0070] Next, there will be described the configuration and operation of the peripheral portion of the grip open / close switch 40 for releasing the grip of the guidewire GW gripped by the gripping portion 20. Fig. 16 is a side cross-sectional view of the grip open / close switch of the wire feeding device when not in operation, and Figs. 17 and 18 are a top cross-sectional view and a side cross-sectional view of the grip open / close switch when in operation.

[0071] The gripping open / close switch 40 has an L-shaped cross section as shown in FIG. 16, and has a pressing part 40A to be pressed by the operator, and an action part 40B that is disposed in the positive direction of the Y axis with respect to the leg part 21B of the gripping part 20 and acts to press the leg part 21B in the negative direction of the Y axis when the pressing part 40A is pressed. The gripping open / close switch 40 is movable in the Y axis direction. The gripping open / close switch 40 is biased in the positive direction of the Y axis by a spring 41, and is configured so that when the operator is not pressing the pressing part 40A, the action part 40B is in a position that does not contact the leg part 21B as shown in FIG. 16. In this embodiment, when the operator is not pressing the pressing part 40A, the gripping open / close switch 40 is adjusted so that the action part 40B (see FIG. 16) is in a position that does not contact the extension part 13A of the slider 13 as shown in FIG. 11.

[0072] In the state shown in Figure 16, the gripping spring 23 of the gripping portion 20 is not compressed, so that the guidewire GW is gripped between the surface of the gripping surface portion 21A of the first part 21 facing the second part 22 and the surface of the gripping surface portion 22A of the second part 22 facing the first part 21.

[0073] For example, when the guidewire delivery device 1 is in a delivery-ready state as shown in Figures 12 and 13, when the gripping opening / closing switch 40 (push portion 40A) is pressed in the negative direction of the Y axis as shown in Figures 17 and 18, the action portion 40B presses the leg portion 21B in the negative direction of the Y axis, and the gripping spring 23 is compressed, so that the surface of the gripping surface portion 21A facing the second part 22 and the surface of the gripping surface portion 22A facing the first part 21 separate from each other, and the gripping of the guidewire GW by the gripping portion 20 is released.

[0074] In this manner, with the wire feeding device 1, by pressing the gripping open / close switch 40, the gripping of the guidewire GW by the gripping unit 20 can be released even when the wire feeding device 1 is in a feedable state as shown in Fig. 12. Therefore, after the wire feeding device 1 is in a feedable state, the gripping of the guidewire GW by the gripping unit 20 can be released, and adjustments such as changing the position or orientation of the guidewire GW can be easily performed.

[0075] Next, a description will be given of the configuration and operation of a modified example for releasing the grip of the guidewire GW gripped by the gripping portion 20. This modified example is a gripping open / close switch that can release the grip by the gripping portion 20 by pressing in the Z-axis direction. Fig. 19 is a side cross-sectional view of the gripping open / close switch according to this modified example when not in operation, and Fig. 20 is a side cross-sectional view when in operation.

[0076] As shown in Fig. 19, the gripping open / close switch 42 according to the modification has a pressing part 42A to be pressed by the operator, and an action part 42B that is disposed in the negative direction of the Z axis with respect to the leg 21B of the gripping part 20 and acts to press the leg 21B in the negative direction of the Y axis when the pressing part 42A is pressed. The surface of the negative direction of the Y axis at the end of the action part 42B in the positive direction of the Z axis is an inclined surface 42C that becomes more negative in the negative direction of the Y axis as it goes in the negative direction of the Z axis. Therefore, when the action part 42B is pressed in the positive direction of the Z axis, the inclined surface 42C hits the leg 21B, and the leg 21B is pressed in the negative direction of the Y axis. The gripping open / close switch 42 is movable in the Z axis direction. The gripping opening / closing switch 42 is biased in the negative direction of the Z axis by a spring 43, and is configured so that when the operator is not pressing the depression portion 42A, the inclined surface 42C of the action portion 42B is in a position that does not contact the leg portion 21B.

[0077] In the state shown in Figure 19, the gripping spring 23 of the gripping portion 20 is not compressed, so that the guidewire GW is gripped between the surface of the gripping surface portion 21A of the first part 21 facing the second part 22 and the surface of the gripping surface portion 22A of the second part 22 facing the first part 21.

[0078] For example, when the guidewire delivery device 1 is in a delivery-enabled state, as shown in FIG. 20, when the gripping opening / closing switch 42 (push portion 42A) is pressed in the positive direction of the Z axis, the inclined surface 42C of the action portion 42B presses the leg portion 21B in the negative direction of the Y axis, and the gripping spring 23 is compressed, so that the surface of the gripping surface portion 21A of the first part 21 facing the second part 22 and the surface of the gripping surface portion 22A of the second part 22 facing the first part 21 are separated to form an arrangement space, and the gripping of the guidewire GW by the gripping portion 20 is released.

[0079] In this manner, even when the wire delivery device 1 is in a delivery-ready state, the grip of the guidewire GW by the gripper 20 can be released by pressing the gripper open / close switch 42. Therefore, after the wire delivery device 1 is in a delivery-ready state, the grip of the guidewire GW by the gripper 20 can be released, and adjustments such as changing the position or orientation of the guidewire GW can be easily performed.

[0080] [Second embodiment] A wire feeding device 101 according to the second embodiment will be described with reference to the drawings. Figures 21 and 22 are a top cross-sectional view and a bottom perspective view of the wire feeding device 101 in an initial state, Fig. 23 is a perspective view of an ejection switch of the wire feeding device 101, Fig. 24 is a first perspective view of the slider, and Fig. 25 is a second perspective view of the slider. Note that parts similar to those of the wire feeding device 1 according to the first embodiment are given the same numbers and duplicated explanations will be omitted.

[0081] The wire feeding device 101 further includes a protrusion 2D (see FIG. 22) on the housing 2, a protrusion 35B on the link 35, a shot switch 110 instead of the shot switch 45, and a slider 113 instead of the slider 13 and the hook 14.

[0082] The protrusion 2D of the housing 2 is a portion that can be engaged with a hook 113D of the slider 113. The protrusion 35B of the link 35 is a portion that can be engaged with a protrusion 110D of the ejection switch 110 (see FIG. 23).

[0083] As shown in FIG. 23, the ejection switch 110 has a protrusion 110A, a protrusion 110B, an extension piece 110C, a protrusion 110D, a fixing hole 110E, and a spring accommodating portion 110F. By rotating the ejection switch 110, the protrusion 110A comes into contact with a protrusion 113B (see FIG. 24) of the slider 113, and can push up the protrusion 113B. By rotating the ejection switch 110, the protrusion 110B comes into contact with a hook 113D of the slider 113, and can push up the hook 113D. The extension piece 110C is formed to extend in the positive direction of the Y axis. The protrusion 110D protrudes in the negative direction of the Z axis from the tip of the extension piece 110C in the positive direction of the Y axis. The protrusion 110D engages with the protrusion 35B of the link 35, preventing the engagement between the protrusion 113D and the protrusion 2D, and allowing the slider 113 to move in the X-axis direction. The fixing hole 110E is a hole into which a screw 111 (see FIG. 22) is inserted for rotatably fixing the ejection switch 110 to the housing 2. The ejection switch 110 is fixed to the housing 2 by the screw 111, and thereby becomes rotatable about the rotation hole 110E. The spring accommodating portion 110F accommodates a spring (not shown) that biases the ejection switch 110 in the negative direction of the Y-axis. Note that the ejection switch 110 itself may be elastically configured to be biased in the negative direction of the Y-axis without including a spring.

[0084] As shown in Figs. 24 and 25, the slider 113 has an extension 113A, a protrusion 113B, a spring hook 113C, and a hook 113D. The extension 113A extends in the positive direction of the X-axis, and the surface on the tip side of the X-axis direction in the negative direction of the Y-axis is inclined to have a thickness that becomes thinner toward the tip side. As shown in Fig. 21, when the tip part of the extension 113A is moved toward the tip side in the X-axis direction, it presses the leg 21B toward the negative direction of the Y-axis, compressing the gripping spring 23 and moving the leg 21B in the negative direction of the Y-axis. As a result, the surface of the gripping surface 21A of the first part 21 on the second part 22 side and the surface of the gripping surface 22A of the second part 22 on the first part 21 side are separated, and the grip of the guidewire GW is released. The protrusion 113B is a portion that comes into contact with the protrusion 110A of the ejection switch 110. The spring hook 113C is engageable with the protrusion 11A of the hammer 11. When the protrusion 113B is pressed by the protrusion 110A, the spring hook 113C is moved in the same direction. The hook 113D is engageable with the protrusion 2D of the housing 2. When the hook 113D engages with the protrusion 2D, the movement of the slider 113 in the positive direction of the X-axis is restricted.

[0085] Next, the method of using the wire delivery device 101 and its operation will be specifically described with reference to the drawings. Figs. 26 and 27 are a top cross-sectional view and a bottom perspective view of the wire delivery device in a delivery-ready state, Fig. 28 is a bottom perspective view of the wire delivery device during delivery, and Fig. 29 is a side cross-sectional view of the wire delivery device after delivery. Although the guidewire GW, catheter 51, connector 60, etc. are not shown in Figs. 26 to 29, the following processing will be described assuming that the catheter 51 and connector 60 are connected to the wire delivery device 101. Note that parts similar to those of the wire delivery device according to the first embodiment are given the same numbers and overlapping descriptions will be omitted.

[0086] The wire delivery device 101 is also configured such that the gripping portion 20, hammer 11, and slider 113 are linked together to grip the guidewire GW, move the gripping portion 20 toward the tip end of the guidewire GW, release the gripping of the guidewire GW, and move the gripping portion 20 toward the rear end, in that order.

[0087] In this state, as shown in FIG. 21, the wire feeding device 101 has the leg 21B pressed in the negative direction of the Y axis by the extension 113A and the gripping spring 23 compressed, so that the surface of the gripping surface 21A of the first part 21 facing the second part 22 is separated from the surface of the gripping surface 22A of the second part 22 facing the first part 21, forming an arrangement space, and the grip of the guidewire GW by the gripping portion 20 is released.

[0088] Next, when the lever 31 is rotated in the R1 direction in Figure 22, the slider 113 slides toward the base end, and as shown in Figure 26, the spring hook 113C of the slider 113 engages with the convex portion 11A of the hammer 11, so that the hammer 11 moves toward the base end as the slider 113 moves, and the compression spring 12 is compressed.

[0089] At this time, grip portion 20 is no longer pushed in the positive direction of the X-axis by hammer 11, so grip portion 20 slides to the rear end of its movable range by the biasing force of return spring 16 (see FIG. 11). As a result, grip portion 20 moves from the forefront (initial position) of its movable range to the rear end of its movable range.

[0090] Furthermore, when the lever 31 is rotated in the R1 direction, the slider 113 slides further toward the base end, and the spring hook 113C of the slider 113 remains engaged with the convex portion 11A of the hammer 11. As the slider 113 moves, the hammer 11 moves toward the base end, and the compression spring 12 is further compressed.

[0091] At this time, the extension portion 113A is no longer in contact with the leg portion 21B of the gripping portion 20 and no longer compresses the gripping spring 23, and the guidewire GW is gripped between the surface of the gripping surface portion 21A facing the second part 22 and the surface of the gripping surface portion 22A facing the first part 21.

[0092] Furthermore, when the lever 31 is rotated to a position (sendable position) at which the slider 113 is at the base end of the moving range, the slider 113 slides further toward the base end, and as shown in Figures 26 and 27, the hook 113D gets over the protrusion 2D of the housing 2 in the negative direction of the X-axis, and the hook 113D engages with the protrusion 2D. This maintains the compression state of the compression spring 12, making it possible to send out (compression maintained state: sendable state), and the slider 113 cannot move in the positive direction of the X-axis.

[0093] Thereafter, when the operator presses the ejection switch 110 in the positive direction of the Y axis, as shown in FIG. 28, the convex portion 110A presses the convex portion 113B of the slider 113 in the positive direction of the Y axis, thereby causing the spring hook 113C to move in the positive direction of the Y axis and release the spring hook 113C from its engagement with the convex portion 11A of the hammer 11.

[0094] As a result, the biasing force of the compression spring 12 is all at once applied to moving the hammer 11 in the tip direction, causing the hammer 11 to move in the tip direction and causing the tip side of the hammer 11 to collide with the base end side of the grip portion 20.

[0095] As a result, the gripping portion 20 gripping the guidewire GW moves toward the distal end due to the impact of the collision with the hammer 11, and stops at the most distal position of the gripping portion 20. At this time, the extension portion 113A of the slider 113 is not in contact with the gripping portion 20, so the gripping state of the guidewire GW is maintained.

[0096] Therefore, the gripping portion 20 moves from the rearmost end position to the foremost end position while maintaining the state of gripping the guidewire GW. As a result, the guidewire GW is delivered to the distal end side from the rearmost end position of the gripping portion 20 to the foremost end position.

[0097] Thereafter, when the operator further presses the ejection switch 110 in the positive direction of the Y axis, the protrusion 110B presses the hook 113D in the positive direction of the Y axis, and the hook 113D is released from the state of being engaged with the protrusion 2D of the housing 2, and as shown in FIG. 29, the protrusion 110D passes over the protrusion 35B of the link 35 in the positive direction of the Y axis. This maintains the ejection switch 110 in a state in which the protrusion 110D is located in the positive direction of the Y axis relative to the protrusion 35B. In this state, the hook 113D is maintained in a state of not being engaged with the protrusion 2D. That is, the slider 113 is maintained in a state in which it can move in the positive direction of the X axis.

[0098] Thereafter, when the operator rotates lever 31 in the direction opposite to the R1 direction, slider 113 moves in the positive direction of the X-axis, and wire feeding device 101 can be returned to the initial state shown in Fig. 21. When it is necessary to continuously feed guidewire GW, lever 31 can be rotated in the same manner as above, and a similar operation can be performed.

[0099] In this way, the wire delivery device 101 according to this embodiment can deliver an appropriate amount of wire by applying an impact force due to the biasing force accumulated in the compression spring 12 to the guidewire GW. Since an impact force can be applied to the guidewire GW in this way, the guidewire GW can effectively penetrate the obstruction.

[0100] [Third embodiment] A wire feeding device 201 according to the third embodiment will be described. Figures 30 and 31 are a top cross-sectional view and a side cross-sectional view of the wire feeding device according to the third embodiment in an initial state. Parts similar to those of the wire feeding devices according to the first and second embodiments are given the same numbers and overlapping descriptions will be omitted.

[0101] Wire feeding device 201 is equipped with a gripping portion 220 instead of gripping portion 20 in wire feeding device 1, a slider 210 instead of slider 13 and hook 14, and a gripping opening / closing switch 240 instead of a gripping opening / closing switch such as gripping opening / closing switch 40.

[0102] The slider 210 has a configuration in which the slider 13 and the hook 14 are integrated, and has an extension 210A instead of the extension 13A. A slit 210B is formed in the extension 210A to guide the operation convex 223A of the gripping portion 220 when the slider 210 moves. The slit 210B has a width at the end in the positive direction of the X-axis that is equal to or greater than the movable range of the operation convex 223A in the Z-axis direction. In this embodiment, the slit 210B is formed so that when the slider 210 moves to the base end side, the operation convex 223A is guided to a position (negative direction side of the Z-axis) where the gripping portion 220 grips the guidewire GW, and when the slider 210 moves to the end on the tip side, the operation convex 223A is guided to a position (positive direction side of the Z-axis) where the gripping portion 220 releases the gripping of the guidewire GW. The shape of the slit 210B is not limited to this, and may be changed depending on the usage situation.

[0103] Next, the gripping portion 220 will be described. Figure 32 is an exploded perspective view of the gripping portion, Figures 33 and 34 are a perspective view and a side cross-sectional view of the gripping portion in a released state, and Figures 35 and 36 are a perspective view and a side cross-sectional view of the gripping portion in a gripping state.

[0104] The gripping portion 220 has a main body portion 221 as an example of a first gripping portion, an opposing part 222 as an example of a second gripping portion, a cam portion 223, a grip release spring 224, a support pin 225, and a retaining ring 226.

[0105] The main body 221 has a gripping surface 221A and a wall 221B. The gripping surface 221A is a surface in the negative direction of the Y axis that grips the guidewire GW, and for example, a rubber member may be attached to this surface. In this embodiment, the gripping surface 221A has a surface that intersects with the movable direction (X axis direction) of the gripping part 220. The wall 221B has a hole 221C for inserting a support pin 225 that rotatably supports the cam part 223, and a hole 221D for inserting a support pin 225 that rotatably supports the counter part 222.

[0106] The cam portion 223 has an operation convex portion 223A, a through hole 223B, and a contact surface 223C. The operation convex portion 223A is provided on the side surface of the cam portion 223, and is a portion for operating the state of the cam portion 223. The through hole 223B is a hole into which a support pin 225 for supporting the rotation of the cam portion 223 is inserted. The contact surface 223C is a surface that comes into contact with the surface of the opposing component 222 in the positive direction of the Y axis. The cross-sectional shape (same shape as the side surface) of the contact surface 223C on a surface perpendicular to the X axis has a straight portion 223D and a curved portion 223E. At the midpoint of the curved portion 223E, there is a maximum outer shape portion 223F where the distance from the rotation axis of the cam portion 223 is maximum. Maximum outer shape portion 223F is located slightly on the positive side of the Z axis from the position of curved portion 223E with which cam portion 223 comes into contact when gripping portion 220 is in a state where it is gripping guidewire GW. Therefore, cam portion 223 can be maintained in a state where gripping portion 220 is gripping guidewire GW.

[0107] The opposing part 222 has a gripping surface 222A and a through hole 222B. The gripping surface 222A is a surface in the positive direction of the Y axis that grips the guidewire GW, and has a surface shape corresponding to the gripping surface 221A of the main body part 221. A rubber member may be attached to the gripping surface 222A. The through hole 222B is a hole into which a support pin 225 for supporting the opposing part 222 to rotate is inserted.

[0108] The grip release spring 224 is arranged while being biased so as to increase the gap between the opposing surfaces of the main body portion 221 and the opposing component 222. In this embodiment, the grip release spring 224 acts to increase the gap between the opposing surfaces of the main body portion 221 and the opposing component 222 when the cam portion 223 is not in a state for fixing the gripping state by the gripping portion 220, specifically, when the cam portion 223 and the opposing component 222 are in contact at a position in the positive direction of the Z axis relative to the maximum outer shape portion 223F or when the cam portion 223 and the opposing component 222 are in contact with each other at the straight portion 223D.

[0109] Support pin 225 is a cylindrical member having a head 225A at a first end and a groove 225B for fitting retaining ring 226 on a second end side opposite the first end.

[0110] The retaining ring 226 is fitted in the groove 225B of the support pin 225 to prevent the support pin 225 from falling out of the holes 221C and 221D.

[0111] Next, a method for assembling the grip portion 220 will be described.

[0112] First, with the grip release spring 224 assembled into the main body 221, the support pin 225 is inserted into the hole 221D in the negative direction of the X axis of the main body 221, the through hole 222B of the opposing part 222, and the hole 221D in the positive direction of the X axis of the main body 221, and a retaining ring 226 is attached to the groove 225B of the support pin 225. Next, the support pin 225 is inserted into the hole 221C in the negative direction of the X axis of the main body 221, the through hole 223B of the cam part 223, and the hole 221C in the positive direction of the X axis of the main body 221, and a retaining ring 226 is attached to the groove 225B of the support pin 225. This completes the grip part 220 shown in FIG.

[0113] The gripping portion 220 shown in Fig. 33 is in a state where the gripping of the guidewire GW is released (gripping released state). In this state, as shown in Fig. 34, the straight portion 223D of the contact surface 223C of the cam portion 223 of the gripping portion 220 is in contact with the surface in the positive direction of the Y axis of the corresponding component 222, and the gripping surface 222A and the gripping surface 221A are separated from each other.

[0114] In contrast, when operation convex portion 223A of cam portion 223 is rotated in the R3 direction, curved portion 223E of contact surface 223C of cam portion 223 comes into contact with the surface in the positive direction of the Y axis of counterpart component 222. This causes gripping surface 222A of opposing component 222 to rotate in the R4 direction, and as shown in Fig. 35, the gap between gripping surface 222A and gripping surface 221A narrows, and finally they come into contact.

[0115] In this state, as shown in Fig. 36, the gripping portion 220 is in contact with the surface of the corresponding component 222 in the positive direction of the Y axis at a position in the negative direction of the Z axis from the maximum outer shape portion 223F, and the gripping surface 222A and the gripping surface 221A are in contact with each other. Since the distance of the maximum outer shape portion 223F from the rotation axis of the cam portion 223 is longer than the contact position, the cam portion 223 is prevented from moving in the opposite direction to the R3 direction, and as a result, the gripping surface 222A and the gripping surface 221A are maintained in contact with each other. Note that, when a force of a predetermined value or more is applied to the operation convex portion 223A in the opposite direction to the R3 direction, this state is eliminated, and the gripping portion 220 is in a state in which the gripping surface 222A and the gripping surface 221A are separated from each other, that is, in a grip release state, as shown in Figs. 33 and 34. In addition, a protrusion may be provided on the upper surface of the opposing component 222 to prevent the cam portion 223 from moving in the direction opposite to the R3 direction so that the contact state between the gripping surface 222A and the gripping surface 221A is maintained.

[0116] Next, a description will be given of the gripping open / close switch 240. Figure 37 is a perspective view of the gripping open / close switch of the wire feeding device.

[0117] The gripping open / close switch 240 has an operation section 240A for the operator to operate, and a storage section 240B in which the operation convex section 223A of the gripping section 220 is stored. The gripping open / close switch 240 is attached to the housing 2 so as to be horizontally movable in the Z-axis direction. The storage section 240B has a rectangular parallelepiped shape with only the surface in the negative direction of the Y-axis open, and the width of the storage section 240B in the X-axis direction is the width of the movement range of the operation convex section 223A in the X-axis direction corresponding to the movement range of the gripping section 220 in the X-axis direction. Therefore, it is guaranteed that the operation convex section 223A is stored in the storage section 240B regardless of the position of the gripping section 220 in the X-axis direction. Therefore, when the gripping open / close switch 240 is operated, the position of the operation convex section 223A in the Z-axis direction can be changed according to the operation, regardless of where the gripping section 220 is in the X-axis direction. For example, in this embodiment, as shown in Figs. 38 and 39 described later, when the wire feeding device 201 is in a feedable state, the position of the operation convex portion 223A can be changed by the gripping open / close switch 240. Therefore, in the feedable state, the gripping of the guidewire GW by the gripping portion 220 can be released, and adjustments such as changing the position and orientation of the guidewire GW can be easily performed. Note that in this embodiment, when the movement range of the operation convex portion 223A is restricted by the slit 210B of the slider 210, the position of the operation convex portion 223A cannot be changed by the gripping open / close switch 240.

[0118] Next, a method of using the wire delivering device 201 according to the third embodiment and the operation thereof will be specifically described with reference to the drawings. Figures 38 and 39 are a top cross-sectional view and a side cross-sectional view of the wire delivering device in a deliverable state. Although the guidewire GW, catheter 51, and connector 60 are omitted in Figures 38 and 39, the description will be given assuming that the catheter 51 and connector 60 are connected to the wire delivering device 201.

[0119] The wire feeding device 201 is configured such that the gripping portion 220, hammer 11, and slider 210 work in conjunction with each other to grip the guidewire GW, move the gripping portion 220 toward the tip end of the guidewire GW, release the gripping of the guidewire GW, and move the gripping portion 220 toward the rear end, in that order.

[0120] In this case, as shown in FIG. 31, in the wire feeding device 201, the operating convex portion 223A of the gripping portion 220 is guided by the slit 210B of the extension portion 210A to a position where the gripping of the gripping portion 220 is released, so that the gripping surface 222A of the opposing part 222 and the gripping surface 221A of the main body part 221 are separated from each other, and the gripping of the guidewire GW by the gripping portion 220 is released.

[0121] Next, when the lever 31 is rotated in the R1 direction, the slider 210 slides toward the base end, and as shown in Figure 38, the protrusion 11A is engaged with the spring hook 14A, so that the hammer 11 moves toward the base end as the slider 210 moves, and the compression spring 12 is compressed.

[0122] At this time, since the grip portion 220 is no longer pushed in the positive direction of the X-axis by the hammer 11, the grip portion 220 slides to the rear end of the movable range by the biasing force of the return spring 16. As a result, the grip portion 20 moves from the forefront (initial position) of the movable range to the rear end of the movable range. In this embodiment, the return spring 16 may not be used, and the operation convex portion 223A may be hooked on the inclined surface of the slit 210B of the slider 210 to return it.

[0123] Furthermore, when the lever 31 is rotated in the R1 direction, the slider 210 slides further toward the base end, and the spring hook 14A remains engaged with the convex portion 11A of the hammer 11. As the slider 210 moves, the hammer 11 moves toward the base end, and the compression spring 12 is further compressed.

[0124] At this time, the slit 210B of the extension portion 210A guides the operating convex portion 223A of the gripping portion 220 to a position where the gripping portion 220 grips, so that the guidewire GW between the gripping surface 222A of the opposing part 222 and the gripping surface 221A of the main body part 221 is gripped.

[0125] When the lever 31 is rotated to a position (sending possible position) where the slider 210 is at the base end side of the moving range, the slider 210 slides further toward the base end side, and as in the case shown in Figures 12 and 13, the convex part 45C of the injection switch 45 climbs over the convex part 13B of the slider 210 and is positioned in the positive direction of the X-axis of the convex part 13B, and they engage with each other. This maintains the compression state of the compression spring 12, and a sending possible state is achieved (compression maintained state: sending possible state), and the slider 210 becomes unable to move in the positive direction of the X-axis.

[0126] Thereafter, when the operator presses the ejection switch 45 in the positive direction of the Y axis, as in the case shown in Fig. 14, the protrusion 45A presses the protrusion 14B of the slider 210 in the positive direction of the Y axis, and the spring hook 14A moves in the positive direction of the Y axis as in the case shown in Fig. 15, and the state in which the spring hook 14A is engaged with the protrusion 11A is released. Also, the protrusion 45C moves in the positive direction beyond the surface of the slider 210 in the positive direction of the Y axis, and is no longer engaged with the protrusion 13B, and the slider 210 becomes movable in the positive direction of the X axis.

[0127] As a result, the biasing force of the compression spring 12 is all at once applied to moving the hammer 11 in the tip direction, causing the hammer 11 to move in the tip direction and causing the tip side of the hammer 11 to collide with the base end side of the grip portion 220.

[0128] As a result, the gripping portion 220 gripping the guidewire GW moves toward the distal end due to the impact of the collision with the hammer 11, and stops at the most distal end position of the gripping portion 220. At this time, the gripping portion 220 maintains the state of gripping the guidewire GW.

[0129] Therefore, the gripping portion 220 moves from the rearmost end position to the foremost end position while maintaining the state of gripping the guidewire GW. As a result, the guidewire GW is delivered to the distal end side by the distance from the rearmost end position to the foremost end position of the gripping portion 220.

[0130] Thereafter, when the operator rotates lever 31 in the direction opposite to R1, slider 210 moves in the positive direction of the X-axis, and wire feeding device 201 can be returned to the initial state shown in Fig. 30. When it is necessary to continuously feed guidewire GW, lever 31 is rotated in the same manner as above, and a similar operation is performed.

[0131] In this way, the wire feeding device 201 according to this embodiment can feed out an appropriate amount of the guidewire GW by applying an impact force due to the biasing force accumulated in the compression spring 12 to the guidewire GW. Since an impact force can be applied to the guidewire GW in this way, the guidewire GW can effectively penetrate the obstruction.

[0132] Next, gripping portion 260 according to a modified example will be described with reference to the drawings. Fig. 40 is an exploded perspective view of gripping portion 260, and Fig. 41 is a perspective view of gripping portion 260 in a released state. Grip portion 260 can be used in the same manner as gripping portion 220 of wire feeding device 201 by replacing it therewith.

[0133] The grip portion 260 has a main body portion 261 , a facing part 262 , a back surface portion 263 , a cam portion 264 , and a grip release spring 265 .

[0134] The main body 261 has a gripping surface 261A and an opposing installation wall 261B. The gripping surface 261A is a surface in the negative direction of the Y axis that grips the guidewire GW, and for example, a rubber member may be attached to this surface. The installation wall 261B has holes 261C for fitting bosses 264B at both ends in the X axis direction of the cam portion 264, holes 261D for fitting bosses 262B at both ends in the X axis direction of the counter part 262, and a boss 261E for fitting into the back surface portion 263.

[0135] The cam portion 264 has an operation convex portion 264A, a boss 264B, a contact surface 264C, and a fixed convex portion 264D. The operation convex portion 264A is provided on the side surface of the cam portion 264 and is a portion for operating the state of the cam portion 264. The boss 264B has a cylindrical shape and is formed on both ends of the cam portion 264 in the X-axis direction. The contact surface 264C is a surface that contacts the surface of the opposing part 262 in the positive direction of the Y-axis. The cross-sectional shape of the contact surface 264C is similar to the shape of the contact surface 223C of the cam portion 223 of the gripping portion 220. The fixed convex portion 264D engages with the fixed recess 263B of the rear portion 263, and can maintain the cam portion 264 in a state in which the gripping portion 260 grips the guidewire GW.

[0136] The opposing part 262 has a gripping surface 262A and a boss 262B. The gripping surface 262A is a surface in the positive direction of the Y axis that grips the guidewire GW, and for example, a rubber member may be attached to this surface. The boss 262B has a cylindrical shape and is formed on both ends of the opposing part 262 in the X axis direction.

[0137] The back surface portion 263 has a hole 263A and a fixing recess 263B. The hole 263A is a hole for fitting the boss 261E of the main body portion 261 at both ends in the X-axis direction. The fixing recess 263B engages with the fixing protrusion 264D of the cam portion 264, and can maintain the cam portion 264 in a state in which the gripping portion 260 grips the guidewire GW.

[0138] The grip release spring 265 is arranged while being biased so as to increase the gap between the opposing surfaces of the main body portion 261 and the opposing component 262. In this embodiment, the grip release spring 265 acts to increase the gap between the opposing surfaces of the main body portion 261 and the opposing component 262 when the cam portion 264 is not in a state for fixing the gripping state by the gripping portion 260, specifically, when the fixing convex portion 264D of the cam portion 264 is not engaged with the fixing concave portion 263B of the back surface portion 263.

[0139] Next, a method for assembling the grip portion 260 will be described.

[0140] First, with the grip release spring 265 assembled into the main body 261, the opposing part 262 or the main body 261 is elastically deformed to fit the boss 262B of the opposing part 262 into the hole 261D of the installation wall 261B of the main body 261. Next, the cam part 264 or the main body 261 is elastically deformed to fit the boss 264B of the cam part 264 into the hole 261C of the installation wall 261B of the main body 261. Thereafter, the rear part 263 or the main body 261 is elastically deformed to fit the boss 261E of the main body 261 into the hole 263A of the rear part 263. This completes the grip part 260 shown in FIG.

[0141] [Fourth embodiment] The wire feeding device according to the fourth embodiment will be described with reference to the drawings. Figures 42 and 43 are a top view and a cross-sectional view of the wire feeding device with the lid open, Fig. 44 is a top view with the lid closed, Fig. 45 is a perspective view of the lid, and Fig. 46 is an enlarged perspective view of the mounting portion of the lid. Note that parts similar to those of the wire feeding devices according to the first to third embodiments are given the same numbers and duplicated explanations will be omitted.

[0142] As shown in Fig. 42, wire feeding device 301 further includes an opening / closing unit 310 for covering guidewire housing 4, and includes a lever 320 (an example of a biasing operation unit) instead of lever 31 used in the above-mentioned device. As shown in Fig. 43, opening / closing unit 310 has a cover 311, a shaft 312, a spring 313, and a screw 314.

[0143] As shown in FIG. 45, the lid 311 has a cylindrical portion 311A ​​extending in the X-axis direction, a covering portion 311C connected to the cylindrical portion 311A ​​for covering at least a portion of the guidewire accommodating portion 4 (an example of a mounting portion), and a rotation operation portion 311B for rotating the lid 311.

[0144] The cylindrical portion 311A ​​has a through hole 311E that penetrates in the longitudinal direction and a boss portion 311F. The through hole 311E is a hole for inserting the mounting shaft 312. The boss portion 311F is a boss used for fixing the rotation state of the lid 311 in a predetermined state, and is disposed on the side of the through hole 311E where the rotation operation portion 311B is located. The cover portion 311C has an opening 311D that prevents contact with the rib 2J.

[0145] 46, a mounting area 2E, a non-through hole 2F, a through hole 2G, and a rib 2J are formed in the housing 2 of the wire feeding device 301. Furthermore, the housing 2 is formed with a groove 2H formed to extend in the positive direction of the Z axis and a groove 2I formed to extend in the negative direction of the Y axis relative to the non-through hole 2F.

[0146] 43, the lid 311 is attached to the housing 2 so as to be rotatable about the shaft 312 by inserting the shaft 312 into the through hole 2G of the housing 2, the spring 313, the through hole 311E of the lid 311, and the non-through hole 2F. The shaft 312 is fixed to the through hole 2G of the housing 2 by a screw 314 so as not to fall off the wire feeding device 301. The spring 313 biases the lid 311 towards the tip side (the positive direction of the X-axis).

[0147] When the boss portion 311F engages with the groove 2I, the opening / closing portion 310 is in an open state, i.e., the guidewire accommodating portion 4 is opened and the guidewire GW can be placed in the guidewire accommodating portion 4. When the boss portion 311F engages with the groove 2H, the opening / closing portion 310 is in a closed state, i.e., at least a portion of the guidewire accommodating portion 4 is closed and the guidewire GW cannot be removed from the guidewire accommodating portion 4. The lid 311 becomes rotatable by moving it in the negative direction of the X-axis against the bias of the spring 313, and the opening / closing portion 310 can be switched between an open state and a closed state.

[0148] Lever 320 of wire feeding device 301 has connection part 320A extending from lever rotation shaft 320O that drives the mechanism, and handle part 320B extending from connection part 320A and operated by the operator's hand.

[0149] A method of loading the guidewire GW in the wire delivery device 301 will now be described. Fig. 47 is a top view showing a state in which the guidewire GW is loaded, and Fig. 48 is a side cross-sectional view of a portion including a guidewire housing of the wire delivery device.

[0150] When the opening / closing unit 310 of the wire feeding device 301 is in the open state as shown in Fig. 42, the catheter 51 is connected to the connector 60, and the connector 60 is connected to the connector connection unit 3 as shown in Fig. 47. At this time, the guidewire GW inserted in the catheter 51 is accommodated in the guidewire accommodating unit 4. Here, in the guidewire accommodating unit 4, the rib 2J causes the guidewire GW to be placed closer to the negative side of the Y-axis of the guidewire accommodating unit 4. This makes it possible to appropriately prevent the covering portion 311C of the opening / closing unit 310 from interfering with the guidewire GW when the opening / closing unit 310 is in the closed state.

[0151] Thereafter, by closing the opening / closing unit 310, the guidewire GW becomes housed in the space between the wall surface of the guidewire housing 4 and the cover 311C of the opening / closing unit 310, as shown in Fig. 48. This makes it possible to appropriately prevent the guidewire GW from falling off the wire delivery device 301.

[0152] Next, the operation of delivering the guidewire GW using lever 320 of wire delivering device 301 will be described with reference to the various drawings. Figure 49 is a perspective view of the wire delivering device in a deliverable state.

[0153] In wire feeding device 301, when the compression spring is not compressed, as shown in FIG. 44, connection part 320A of lever 320 extends from lever rotation axis 320O in the positive direction of the X-axis and the positive direction of the Y-axis, and handle part 320B extends from the connection part with connection part 320A in the negative direction of the X-axis and the positive direction of the Y-axis. The bottom surface of handle part 320B is located at a position higher than a predetermined height from the upper surface of housing 2. The predetermined height may be a height taking into consideration the expected thickness of the fingers and hand of the operator. By making it higher, it is possible to appropriately prevent the hand or fingers gripping handle part 320B from contacting the guidewire GW.

[0154] In wire feeding device 301, lever 320 is rotated clockwise from the state shown in Fig. 44 to the state shown in Fig. 49, whereby compression spring 12 can be maintained in a compressed state, i.e., guidewire GW can be maintained in a state in which it can be fed. In this manner, with compression spring 12 in a compressed state, connection part 320A extends from lever rotation axis 320O in the positive direction of the Y axis, and handle part 320B extends from the connection part with connection part 320A in the negative direction of the X axis.

[0155] In this manner, in the wire feeding device 301, the movement range of the lever 320 (connection portion 320A and handle portion 320B) when operating to feed the guidewire GW is on the lever rotation axis 320O side with respect to a vertical plane extending in the Z-axis direction passing through the placement position of the guidewire GW. This makes it possible to appropriately prevent the hand or fingers gripping the handle portion 320B from coming into contact with the guidewire GW.

[0156] [Fifth embodiment] A wire feeding device 401 according to the fifth embodiment will be described with reference to the accompanying drawings. Fig. 50 is a perspective view of the wire feeding device 401, Fig. 51 is a bottom perspective view of the wire feeding device 401 when the ejection switch is not fixed, and Fig. 52 is a bottom perspective view of the wire feeding device 401 when the ejection switch is fixed. Parts similar to those of the wire feeding devices according to the first to fourth embodiments are given the same numbers and duplicated explanations will be omitted.

[0157] The wire feeding device 401 is the same as the wire feeding device 301, and further includes an operation fixing part 403 for fixing the ejection switch 45 in a pressed state.

[0158] The operation fixing portion 403 has a fixed switch 404 and a spring 405 that biases the fixed switch 404 toward the ejection switch 45. The fixed switch 404 has a convex portion 404A that protrudes to the outside of the housing 2 for operation by the operator, and a contact portion 404B that comes into contact with the ejection switch 45.

[0159] When the ejection switch 45 is not pressed, as shown in Fig. 51, the contact portion 404B of the fixed switch 404 is in contact with the side surface of the ejection switch 45 in the negative direction of the X-axis. In this case, the operator can press the ejection switch 45.

[0160] When the ejection switch 45 is pressed, the contact portion 404B of the fixed switch 404 comes into contact with the negative side of the Y axis of the ejection switch 45 and moves in the positive direction of the X axis, as shown in Fig. 52. As a result, the ejection switch 45 is unable to rotate in the negative direction of the Y axis due to the contact portion 404B, and the pressed state is maintained.

[0161] In this manner, when the ejection switch 45 is maintained in the pressed state, when the compression spring 12 is compressed, the convex portion 45A of the ejection switch 45 presses the convex portion 14B, so that the spring hook 14A of the hook 14 comes off the convex portion 11A of the hammer 11, causing the hammer 11 to collide with the grip portion 220. Therefore, the operator can continuously operate the lever 31 without operating the ejection switch 45 again, thereby continuously feeding out the guidewire GW.

[0162] When the ejection switch 45 is maintained in a pressed state, the operator can move the convex portion 404A of the fixed switch 404 in the negative direction of the X-axis, thereby returning the ejection switch 45 to an unpressed state as shown in FIG. 51.

[0163] The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the spirit of the invention. For example, the following modifications are also possible.

[0164] In the above embodiment, a metal spring is used as the compression spring 12, but other types of elastic bodies such as rubber strings, leaf springs, etc. may be used, and the material of the elastic body may be a resin material. In the above embodiment, the hammer 11 is also made of metal, but it may be made of a resin material like the compression spring.

[0165] Although the urging force of the hammer 11 in the distal direction is increased by moving the hammer 11 and compressing the compression spring 12, for example, an elastic body may be provided so as to expand in response to the movement of the base end side of the hammer 11, and the urging force may be increased by the expansion of the elastic body. Alternatively, for example, the gripping parts 20, 220, 260 may be directly moved in the distal direction by the compression spring 12 without using the hammer 11.

[0166] A mechanism for adjusting the movable range in the X-axis direction of the gripping parts 20, 220, 260, for example, a mechanism for moving the position of a wall in the X-axis direction that determines the movable range, may be provided. In this way, the amount of wire fed by the wire feeding device can be easily and appropriately adjusted.

[0167] A mechanism for adjusting the amount of compression of the compression spring 12 in the initial state, for example a mechanism for moving the position of the wall on the base end side of the compression spring 12, may be provided. In this way, the impact force applied to the gripping parts 20, 220, 260 by the hammer 11 in the wire feeding device can be easily and appropriately adjusted. Also, in the above embodiment, it is assumed that the compression spring 12 is not compressed at all in the initial state, but the compression spring 12 may be somewhat compressed in the initial state.

[0168] Although the operator rotates the levers 31, 320 by hand to deliver the guidewire GW, the guidewire GW may be delivered by a motor operated by electricity. For example, the link 35 may be rotated by the power of a motor. In this case, the motor may be stopped when the link 35 is rotated by a predetermined angle. For example, a switch for driving the motor may be provided, and when the switch is pressed once, the motor may be driven to rotate the link 35 by a predetermined angle.

[0169] The configurations of the wire feeding devices according to the above-described embodiments may be combined. For example, the gripper 20 in the second embodiment may be replaced by the grippers 220, 260 in the third embodiment. The lever 31 in the first and second embodiments may be replaced by the lever 320 in the fourth embodiment. The open / closer 310 in the fourth embodiment may be provided in the wire feeding devices according to the first and second embodiments. The operation fixing unit 403 in the fifth embodiment may be provided in the wire feeding devices according to the first to third embodiments.

[0170] The present invention is not limited to the configurations of the above-described embodiments, but is intended to include all modifications within the meaning and scope of the claims, as defined by the claims. [Explanation of symbols]

[0171] 1 Wire sending device 2. Chassis 2A Grip accommodation portion 2B Slider accommodation portion 2C Support hole 2D Convex portion 2E Mounting area 2F Non-through hole 2G Through hole 2H,2I Groove 2J Rib 3 Connector connection part 3A,3B connection piece 4 Guidewire storage section 11 Hammer 11A Convex part 12 Compression spring 13 Slider 13A Extension part 13B Convex part 13C Mounting part 14 Hook 14A Spring hook 14B Convex part 16 Return spring 20 Gripping part 21 First Part 21A Gripping surface part 21B Leg part 22 2nd Part 22A Gripping surface portion 22B Concave portion 22C Through hole portion 23 Grip spring 31 Lever 31O Lever rotation axis 35,37 Link 35A Cylindrical part 35B Convex part 36,38 Joint 40,42 Grip open / close switch 40A, 42A Pressing part 40B, 42B Acting part 42C Slope 41,43 Spring 45 Ejection switch 45A Convex part 45B Extension piece 45C Convex part 45D Fixing hole 45E Spring housing 46 Screw 51 Catheter 52 Catheter Hub 52A Rear end 60 Connectors 60A Dial portion 60B Through hole 60C Mounting portion 60D Rear end portion 101 Wire feeding device (second embodiment) 110 Ejection switch 110A convex part 110B convex part 110C extension piece 110D convex part 110E Fixing hole 110F Spring housing 111 Screw 113 Slider 113A Extension 113B Convex 113C Spring hook 113D Hook 201 Wire feeding device (third embodiment) 210 Slider 210A Extension 210B Slit 220 Gripping part 221 Main body 221A Gripping surface 221B Wall 221C, 221D Hole 222 Counterparts 222A Gripping surface 222B Through hole 223 Cam section 223A Operation convex portion 223B Through hole 223C Contact surface 223D Straight section 223E Curved section 223F Maximum external dimension 224 Release spring 225 Support pin 225A Head 225B Groove 226 Retaining ring 240 Grip Open / Close Switch 240A Operating section 240B Storage section 260 Gripping part 261 Main body 261A Gripping surface 261B Installation wall 261C hole 261D hole 261E Boss 262 Counterparts 262A Gripping surface 262B Boss 263 Back section 263A Hole 263B Fixing recess 264 Cam section 264A Operation convex part 264B Boss 264C Contact surface 264D Fixing convex part 265 Release spring 301 Wire sending device (fourth embodiment) 310 Opening and closing section 311 Lid 311A cylindrical portion 311B cover portion 311C rotating operation portion 311D opening 312 Shaft 313 Spring 314 Screw 320 Lever 320A Connection part 320B Handle part 401 Wire sending device (fifth embodiment) 403 Operation fixed part 404 Fixed Switch 404A Convex part 404B Contact part 405 Spring GW Guidewire

Claims

1. A wire delivery device that delivers a wire in a distal direction, a gripping portion capable of gripping and releasing the wire and moving in the distal end direction and the proximal end direction; an elastic body capable of urging the gripping portion toward the tip end; a biasing portion that deforms the elastic body to increase a biasing force in the tip direction, When the deformation of the elastic body by the biasing portion is released, the wire gripped by the gripping portion is fed in the distal end direction by the biasing force of the elastic body, a first mode in which, when the deformation of the elastic body by the biasing unit reaches a predetermined state in response to a first predetermined operation, the deformation of the elastic body is automatically released, thereby continuously feeding the wire in the distal end direction; a second mode in which, when the deformation of the elastic body by the biasing portion reaches a predetermined state, the deformation of the elastic body by the biasing portion is released in response to a second predetermined operation, and the wire is fed once in the tip direction.

2. In the first mode, a series of operations are repeatedly executed in the order of (a), (b), and (c) below in response to the first predetermined operation, (a) gripping of the wire by the gripping portion and deformation of the elastic body by the biasing portion; (b) releasing the deformation of the elastic body and feeding the gripping portion gripping the wire toward the tip side by the biasing force of the elastic body; and (c) releasing the gripping portion from the wire and moving the gripping portion toward the rear end side; 2. The wire feeding device according to claim 1, wherein in the second mode, after performing (a), (b) is performed in response to the second predetermined operation.

3. The wire feeding device according to claim 1 or 2, further comprising an operation unit capable of switching between the first mode and the second mode.

4. a deformation maintaining unit capable of maintaining a deformation state of the elastic body that has been brought into a predetermined state by increasing the biasing force of the biasing unit; a maintenance state changing unit capable of changing a state in which the deformation maintaining unit cannot maintain the deformation state of the elastic body, the operation unit is capable of setting the maintenance state changing unit to a state in which the deformation maintenance unit is unable to maintain the deformation state of the elastic body, When the deformation maintaining unit maintains the deformation state of the elastic body, which has been brought to a predetermined state by increasing the biasing force of the biasing unit, and the operation unit is operated to set the maintenance state changing unit to a state in which the deformation maintaining unit is unable to maintain the deformation state of the elastic body, the grasping unit is moved in the distal direction by the biasing force of the elastic body, which is no longer able to maintain the deformation state, and the wire grasped by the grasping unit is fed in the distal direction.

4. The wire delivery device of claim 3.

5. The operation unit causes the maintenance state changing unit to set and maintain a state in which the deformation maintaining unit cannot maintain the deformation state of the elastic body, thereby enabling the device to operate in the first mode.

5. The wire feeder of claim 4.

6. The deformation maintaining unit may further include an operation fixing unit capable of fixing the operation unit in a state in which the maintenance state changing unit is set to a state in which the deformation maintaining unit cannot maintain the deformation state of the elastic body.

6. The wire delivery device of claim 5.

7. The wire feeding device according to claim 1 , further comprising a gripping operation part capable of manipulating a state in which the wire is gripped by the gripping part.

8. The wire-holding member further includes a striking portion disposed on a base end side of the holding portion, the striking portion being movable in the axial direction of the wire and being movable toward and away from the holding portion. A wire feeder according to any one of claims 1 to 7.

9. A wire delivery device that delivers a wire in a distal direction, a gripping portion capable of gripping and releasing the wire and moving in the distal end direction and the proximal end direction; an elastic body capable of urging the gripping portion toward the tip end; a biasing portion that deforms the elastic body to increase a biasing force in the distal end direction; a release portion that releases the deformation of the elastic body in which the biasing force has been increased by the biasing portion, the gripping portion is moved in the distal direction by the biasing force of the elastic body, the deformation of which has been released by the release portion, and the wire gripped by the gripping portion is fed in the distal direction, a gripping operation unit capable of manipulating a gripping state of the wire by the gripping unit; The wire is further provided with a striking portion disposed on a base end side of the gripping portion, the striking portion being movable in an axial direction of the wire and being movable toward and away from the gripping portion. Wire delivery device.

10. The release portion is a deformation maintaining unit capable of maintaining a deformation state of the elastic body that has been brought into a predetermined state by increasing the biasing force of the biasing unit; a maintenance state changing unit that changes the state in which the deformation maintaining unit cannot maintain the deformation state of the elastic body, The gripping operation unit is capable of operating the gripping unit gripping the wire to a released gripping state when the deformation state of the elastic body is maintained by the deformation maintaining unit.

10. The wire delivery device of claim 9.

11. The gripping portion has a first clamping portion and a second clamping portion that clamp the wire, and a cam portion that can adjust the distance between the first clamping portion and the second clamping portion. A wire feeder according to any one of claims 1 to 10.

12. a placement section on which a wire to be gripped by the gripping section can be placed, the placement section being open on its entire surface in a predetermined direction along the longitudinal direction of the wire; and an opening / closing unit capable of opening and closing at least a part of the surface of the placement unit that is open in the predetermined direction. A wire delivery device according to any one of claims 1 to 11.

13. The elastic body is further provided with a biasing operation unit that is manually operated by an operator to increase the biasing force of the biasing unit against the elastic body. The biasing operation portion has a handle portion that is operated by the operator's hand during operation at a position offset away from the placement position of the wire. A wire delivery device according to any one of claims 1 to 12.

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