Wire feed device

Abstract

This wire feed device 1 comprises: a gripping part 20 capable of gripping and ungripping a wire and moving forwards and rearwards; a pressing spring 12 capable of biasing the gripping part 20 forwards; a slider 13 and a hook 14 that cause the pressing spring 12 to deform and increase the forward biasing force; and the slider 13, the hook 14, and an ejection switch 45 that release the deformed state of the pressing spring 12 in which the biasing force has been increased. The biasing force from the pressing spring 12 in which the deformed state has been released by the slider 13, the hook 14, and the ejection switch 45 moves the gripping part 20 forwards and feeds the wire gripped by the gripping part 20 forwards. The gripping part 20 has a planer facing component and a curved-face facing component. The gripping part 20 is configured so that the timings at which the wire is gripped by the planer facing component and the curved-face facing component can be varied.

Description

Wire feeding device

[0001] The present invention relates to a wire feeding device that feeds a wire.

[0002] When improving blood flow by removing an obstruction that blocks a blood vessel, such as a chronic total occlusion (CTO), for example, a soft guidewire is used to try to penetrate the obstruction, and if the soft guidewire cannot be penetrated, the guidewire is gradually replaced with a harder antegrade guidewire. This method requires the effort of replacing the guidewire and the cost of using multiple guidewires.

[0003] However, when penetrating an obstruction with a guidewire, the operator manually grasps and manipulates the guidewire via a torquer, so the distance the guidewire is advanced depends on the operator's sense. Therefore, a technology that allows the guidewire to be advanced a constant distance without relying on the operator's sense is desired. As a technology that allows the medical wire to be advanced a predetermined distance and that allows the pressing force of the medical wire to be effectively transmitted, for example, the technology described in Patent Document 1 is known.

[0004] JP 2016-202711 A

[0005] In the technology described in Patent Document 1, the operator pushes the medical wire by pressing a spring. As a result, the pressing force on the medical wire is relatively limited and may not be sufficient to penetrate the obstruction with the medical wire. This makes it necessary to replace the medical wire in order to penetrate the obstruction. This does not solve the problems of the effort required to replace the medical wire and the cost of using multiple medical wires.

[0006] Furthermore, in the technology of Patent Document 1, when the gripping member that holds the medical wire moves toward the tip end beyond a predetermined distance, the gripping member disengages from the engaging member that maintains the gripped state of the medical wire, thereby preventing the movement of the medical wire from exceeding the predetermined distance. However, there is a risk that the 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.

[0007] The present invention was made based on the above circumstances, and its object is to make it possible to make the amount of wire movement an appropriate amount and to feed the wire with an appropriate force.

[0008] In order to achieve this object, a wire feeding device according to a first aspect is a wire feeding device that feeds a wire in a distal direction, and includes a gripping portion that can grip and release the wire and that can move in the distal direction and the rearward direction, an elastic body that can urge 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, and is configured so that the gripping portion moves 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 in the distal direction, and the gripping portion has a first gripping portion and a second gripping portion, and is configured so that the first gripping portion and the second gripping portion can grip the wire at different times.

[0009] In the wire feeding device, the first gripping portion may be disposed further toward the distal end than the second gripping portion.

[0010] In the above-described wire feeding device, the first gripping portion may be formed to grip the wire with a flat surface, and the second gripping portion may be formed to grip the wire with a curved surface.

[0011] A wire feeding device according to a second aspect is a wire feeding device that feeds a wire in a distal direction, and includes a gripping portion that can grip and release the wire and that can move in the distal direction and the rearward direction, an elastic body that can urge 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, and is configured to move the gripping portion in the distal direction by the biasing force of the elastic body whose deformation state has been released by the release portion, thereby feeding the wire gripped by the gripping portion in the distal direction, and further includes a gripping operation portion that can operate the state of gripping of the wire by the gripping portion, and an operation portion of the gripping operation portion that is operated by a user is located in the rearward direction relative to the gripping portion.

[0012] In the above-mentioned wire feeding device, the gripping operation unit may be provided with a link member that transmits the movement of the operation part to the gripping unit, and when the operation part is operated, the state of gripping of the wire by the gripping unit may be controlled via the link member.

[0013] The wire feeding device may further include an erroneous operation prevention wall provided around the operation portion to prevent erroneous operation of the operation portion.

[0014] 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.

[0015] 17 is a diagram illustrating a connector for connecting a guidewire and a catheter connected to the wire delivery device to the wire delivery device. FIG. 18 is a diagram illustrating a connected state of the guidewire and catheter and the connector. FIG. 19 is a perspective view of a wire delivery device according to an embodiment. FIG. 20 is a perspective view of a wire delivery device to which a guidewire and a catheter are connected. FIG. 21 is a top cross-sectional view of the wire delivery device shown in FIG. 3 in an initial state. FIG. 22 is a bottom cross-sectional view of the interior of the wire delivery device in the initial state shown in FIG. 5. FIG. 23 is a side cross-sectional view of the initial state shown in FIG. 5. FIG. 24 is a perspective view of a slider of the wire delivery device. FIG. 25 is a perspective view of an ejection switch of the wire delivery device. FIG. 26 is a perspective view of a hook of the wire delivery device. FIG. 27 is a perspective view of a slider trigger of the wire delivery device. FIG. 28 is a perspective view of a slider lock of the wire delivery device. FIG. 29 is a configuration diagram of a gripper of the wire delivery device. FIG. 29 is an exploded perspective view of the gripper. FIG. 20 is a side view and a perspective view of a cam portion of the gripper. FIG. 21 is a diagram illustrating the state of the gripper at each point in time. FIG. 22 is a top cross-sectional view of the wire delivery device in a ready-to-deliver state. FIG. 23 is a side cross-sectional view of the ready-to-deliver state shown in FIG. 17. FIG. 24 is a top cross-sectional view of the wire delivery device during delivery. FIG. 25 is a bottom cross-sectional view of the wire delivery device during delivery. 1 is a top cross-sectional view of the wire feeder device when the slider starts to move after feeding; FIG. 1 is a top cross-sectional view of the wire feeder device after the slider starts to move; FIG. 2 is a perspective view of the grip open / close switch in a closed state; FIG. 3 is a perspective view of related parts when the grip open / close switch is in a closed state; FIG. 4 is a perspective view of the grip open / close switch in an open state; FIG. 5 is a perspective view of related parts when the grip open / close switch is in an open state; FIG. 6 is a perspective view of the grip open / close switch according to a modified example when in a closed state; FIG. 7 is a perspective view of a link portion of the grip open / close switch; FIG. 8 is a perspective view of the grip open / close switch in an open state.

[0016] 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 shown in the drawings.

[0017] As used herein, the term "guidewire" refers to a medical guidewire that is advanced to a surgical site within a body cavity, such as a blood vessel, and used to guide a catheter to that site. The terms "distal side" and "distal direction" refer to the side and direction along the longitudinal (axial) direction of the guidewire toward the location of an obstruction that the guidewire is to penetrate. The terms "rear side" and "rear direction" refer to the opposite side and direction of the distal end. The term "base end" refers to the direction along the longitudinal direction of the guidewire, opposite the distal end. The term "distal end" refers to the distal end of any component or part, and the term "base end" refers to the proximal end of any component or part.

[0018] A wire delivery device 1 (see FIG. 3 ) according to one embodiment is a device for delivering a guidewire, which is an example of a wire. The guidewire is advanced to a surgical site in a body cavity, such as a blood vessel, and is used to penetrate an obstruction at the surgical site. The wire delivery device 1 is used by connecting a catheter into which the guidewire has been inserted to the device.

[0019] Before describing the details of the wire delivery device 1, we will explain the guidewire and catheter connected to the wire delivery device 1. Fig. 1 is a diagram illustrating connectors for connecting the guidewire and catheter to the wire delivery device 1, and Fig. 2 is a diagram showing their connected state.

[0020] 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 proximal end 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 distal end side), and the right side of the drawing is the outside of the patient's body (the proximal end side).

[0021] As shown in FIG. 2 , the catheter 51 is connected to a connector 60 and connected to the wire feeding device 1 via the connector 60. As shown in FIG. 1B , the connector 60 has a dial portion 60A, an attachment portion 60C, and a rear end portion 60D. The dial portion 60A is a portion for an operator (user) 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 (described later) of the wire feeding device 1 (see FIG. 3 ). 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 (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 relative to the connector connection portion 3.

[0022] 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 rotatable together.

[0023] 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. Wire delivery device 1 comprises a housing 2, a lever 31, a connector connection portion 3, a guidewire housing 4, and a grip portion 20. The wire delivery device 1 is basically placed on a flat surface such as a desk, and is used by an operator positioned in the negative direction of the Y axis of the wire delivery device 1 in Fig. 3, grasping the grip 2E of the housing 2 with the left hand and operating the lever 31 with the right hand.

[0024] The housing 2 has a generally rectangular parallelepiped shape with its longitudinal axis (X-axis direction) extending when the guidewire GW is attached, and includes the gripping portion 20 and various components (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 operated by the operator when delivering the guidewire GW. In this embodiment, the operator can prepare to deliver the guidewire GW by grasping and rotating the lever 31 with one hand.

[0025] The connector connection portion 3 is a portion for connecting the mounting portion 60C and has a pair of connection pieces 3A and 3B extending in the X-axis direction. The connection pieces 3A and 3B are made of an elastic material such as resin and sandwich the outer circumferential surface of the mounting portion 60C from both sides in the Y-axis direction, rotatably connecting the connector 60. The guidewire accommodating portion 4 is a portion for accommodating the guidewire GW to be delivered and extends in the X-axis direction. The guidewire accommodating portion 4 is formed in a concave shape that is open in the positive direction of the Z-axis throughout the entire X-axis direction. The gripping portion 20 is a portion capable of gripping the guidewire GW and moving in the X-axis direction. The gripping portion 20 is disposed in the middle of the guidewire accommodating portion 4 in the X-axis direction, and gripping surfaces 201A, 202A, and 203A (see FIG. 13 ), which will be 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) of the guidewire accommodating section 4 in the negative direction of the Z axis, the guidewire GW is arranged in the gap (arrangement space) between the gripping surface 201A and the gripping surfaces 202A and 203A that hold the guidewire GW.

[0026] When connecting the catheter 51 and guidewire GW to the wire delivery device 1, the portion of the guidewire GW that is closer to the proximal end than the connector 60 is placed on the bottom surface of the recessed portion of the guidewire housing 4, and the attachment portion 60C, which is connected to the catheter 51 with the guidewire GW inserted therein, is fitted into the connecting pieces 3A and 3B. In this manner, as shown in FIG. 4 , the catheter 51 and the guidewire GW are connected to the wire delivery device 1. In this connected state, the operator can easily adjust the orientation of the catheter 51 by rotating the dial portion 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 and the surface of the housing 2 on the positive side of the X axis. This allows liquids, such as blood or medicinal solutions, that pass through the catheter 51 to easily flow down through the gap, thereby appropriately preventing the components of the housing 2 from coming into contact with the liquid. Furthermore, when the lever 31 is in the initial state, the guide wire GW is not gripped as described below, so the position and orientation of the guide wire GW can be adjusted by moving and rotating it back and forth.

[0027] The housing 2 is provided with an opening / closing unit 80 for covering the guidewire accommodating portion 4. The opening / closing unit 80 has a lid 81 and a shaft 82. The lid 81 has a lid portion 81A extending in the X-axis direction, a rotation operation portion 81B for rotating the lid portion 81A, and an opening 81C for preventing contact with a rib 2J formed on the housing 2 toward the guidewire accommodating portion 4. The shaft 82 is inserted through the lid 81, and the lid 81 is rotatably connected to the housing 2. The opening / closing unit 80 can switch the guidewire accommodating portion 4 between an open state and a closed state by rotating the lid 81. The open state means that the guidewire accommodating portion 4 is open and the guidewire GW can be placed in the guidewire accommodating portion 4, and the closed state means that at least a portion of the guidewire accommodating portion 4 is closed and the guidewire GW will not fall out of the guidewire accommodating portion 4. The lid 81 may be configured to be fixed in the closed state when the guidewire accommodating portion 4 is closed.

[0028] Next, the wire feeder 1 will be described in detail. Fig. 5 is a top cross-sectional view of the wire feeder 1 in its initial state. The wire feeder 1 includes a housing, a grip, a compression spring, a return spring, a slider, a hook, a slider trigger, a slider lock, and an ejection switch. Fig. 6 is a bottom perspective view of the interior of the wire feeder 1 in its initial state. Fig. 7 is a side cross-sectional view of the wire feeder 1 in its initial state. Fig. 8 is a perspective view of the slider. Fig. 9 is a perspective view of the ejection switch. Fig. 10 is a perspective view of the hook. Fig. 11 is a perspective view of the slider trigger. Fig. 12 is a perspective view of the slider lock. Fig. 13 is a perspective view of the grip. Fig. 14 is an exploded perspective view of the grip. Fig. 15 is a side view and a perspective view of the cam. Fig. 16 shows the state of the grip at each point in time. FIG. 6 shows a state in which a part of the housing on the negative side of the Z axis is removed from the wire feeder 1, and a similar state may be shown in the bottom perspective views of other figures in this specification.

[0029] The wire feeding device 1 includes a housing 2, a gripping portion 20, a hammer 11, a compression spring 12, a slider 13, a hook 14, a slider trigger 15, a return spring 16, a slider lock 17, a gripping open / close switch 40, and an ejection switch 45. The compression spring 12 is an example of an elastic body. The slider 13, the hook 14, and the slider trigger 15 are examples of a biasing portion. The hammer 11 is an example of a striking portion. As shown in FIG. 6 , the wire feeding device 1 further includes a lever 31, links 35 and 37, and joints 36 and 38. Here, the lever 31, links 35, 37, joints 36, 38, and slider 13 are an example of a power transmission mechanism, the slider 13, hook 14, slider trigger 15, slider lock 17, and ejection switch 45 are an example of a deformation maintaining unit, and the ejection switch 45 is an example of a maintaining state changing unit and an operating unit. The grip open / close switch 40 is an example of a grip operating unit. The slider 13, hook 14, slider trigger 15, slider lock 17, and ejection switch 45 are an example of a release unit.

[0030] 5, the housing 2 has a grip portion housing 2A that houses the grip portion 20 movably in the X-axis direction, and a slider housing 2B that houses the slider 13, the hook 14, and the slider trigger 15 movably in the X-axis direction. The housing 2 further has a support hole 2C that rotatably supports a cylindrical portion 35A on one end side of the link 35. The housing 2 also has a grip 2E that is held by the operator, and an erroneous operation prevention wall 2F that covers a part of the periphery (in this embodiment, the negative side of the Z-axis) of an operation portion 41 (described later) of the grip open / close switch 40.

[0031] 8, the slider 13 has a plate-shaped extension 13A extending in the X-axis direction, an attachment portion 13C to which the hook 14 can be attached, and a connection portion 13D to which the link 37 is rotatably connected via a joint 38 and to which the slider trigger 15 is rotatably connected. The extension 13A has a slit 13B formed therein that guides the operation convex portion 204A (see FIG. 13) of the grip portion 20 when the slider 13 moves. The width of the end of the slit 13B in the X-axis direction is equal to or greater than the movable range of the operation convex portion 204A in the Z-axis direction. In this embodiment, the slit 13B is formed so that when the slider 13 moves toward the proximal end, the operation convex portion 204A is guided to a position (negative side of the Z axis) where the gripping portion 20 grips the guidewire GW, and when the slider 13 moves to the end on the distal side, the operation convex portion 204A is guided to a position (Z axis direction side) where the gripping portion 20 releases the gripping of the guidewire GW. Note that the shape of the slit 13B is not limited to this and may be changed depending on the usage situation.

[0032] As shown in FIG. 9 , the firing switch 45 has an operating portion 45A, a protrusion 45B, a fixing hole 45C, and a spring housing 45D. The operating portion 45A is a portion that the operator presses to feed the wire. By rotating the firing switch 45, the protrusion 45B comes into contact with the protrusion 14B of the hook 14 (see FIGS. 10 and 20 ) and can push up the protrusion 14B. The fixing hole 45C is a hole into which a screw 46 is inserted to rotatably fix the firing switch 45 to the housing 2. By fixing the firing switch 45 to the housing 2 with the screw 46, the firing switch 45 can rotate about the fixing hole 45C. A spring (not shown) is housed in the spring housing 45D, which biases the firing switch 45 in the negative direction of the Y axis. When the firing switch 45 is not pressed, the operating portion 45A protrudes from the side surface of the housing 2 in the negative direction of the Y axis. It is also possible to use no spring and have the ejection switch 45 itself have elasticity so as to be biased in the negative direction of the Y axis.

[0033] The hook 14 is attached to the attachment portion 13C of the slider 13. As shown in FIG. 10 , the hook 14 has a hammer hook 14A and a protrusion 14B. The hammer hook 14A is engageable with a protrusion 11C (described later) of the hammer 11. The protrusion 14B is a portion that comes into contact with a protrusion 45B of the injection switch 45. When the protrusion 14B is pressed in the positive direction of the Y axis by the protrusion 45B, the hook 14 elastically deforms, and the hammer 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 also be configured as an integrated body.

[0034] As shown in FIG. 11 , the slider trigger 15 has protrusions 15A and 15B, a connecting portion 15C, and a return spring 15D. The slider trigger 15 is rotatably attached to the connecting portion 13D of the slider 13 by inserting a pin member into the connecting portion 15C. The protrusion 15A protrudes in the negative direction of the Y axis and is configured to be located in the positive direction of the Y axis of the protrusion 11C of the hammer 11 when the hammer 11 is in a delivery-ready state. The protrusion 15B is engageable with a hook 17A of the slider lock 17, which will be described later. The return spring 15D biases the slider trigger 15 in the clockwise direction in the state shown in FIG. 11 around the connecting portion 15C.

[0035] The slider lock 17 is fixed to the housing 2. As shown in Fig. 12, the slider lock 17 has a hook 17A at the end on the positive side of the X axis. The hook 17A is capable of engaging with the protrusion 15B of the slider trigger 15.

[0036] As shown in FIG. 5, on the negative side of the X-axis of the gripping portion 20, the hammer 11 is arranged with its longitudinal direction aligned with the X-axis, and around the portion of the hammer 11 on the negative side of the X-axis and on the negative side of the X-axis of the hammer 11, the compression spring 12 is arranged with its longitudinal direction aligned with the X-axis.

[0037] The hammer 11 has a tip portion 11A made of, for example, resin and a metal portion 11B, and is movable in the X-axis direction. A protrusion 11C is formed on the tip portion 11A of the hammer 11 on the slider accommodating portion 2B side. The protrusion 11C is capable of engaging with a hammer hook 14A. The compression spring 12 is, for example, a metal spring, and is deformable (compressible) in the X-axis direction, and is capable of applying a biasing force to the hammer 11 in the positive direction of the X-axis.

[0038] 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 of the compression spring 12 on the grip portion 20 in its initial state (a state in which no compression due to movement of the hammer 11 occurs). As a result, when the compression spring 12 is in its initial state, the grip portion 20 is located at the most extreme position of its movable range (the most extreme position in the X-axis direction within the grip portion accommodating portion 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 its movable range (the most extreme position in the X-axis direction within the grip portion accommodating portion 2A).

[0039] The gripping portion 20, which can grip the guidewire GW, is movable in the direction along the X-axis in the gripping portion housing portion 2A. As shown in Figures 13 and 14, the gripping portion 20 has a main body portion 201, a flat opposing part 202, a curved opposing part 203, a cam portion 204, a grip release spring 205, a support pin 206, and a retaining ring 207. Here, the main body portion 201 and the flat opposing part 202 correspond to a first gripping portion, and the main body portion 201 and the curved opposing part 203 correspond to a second gripping portion.

[0040] The main body 201 has a gripping surface 201A and a wall portion 201B. The gripping surface 201A is a surface facing 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 201A has a flat gripping surface 201Aa that faces the flat opposing part 202 and a curved gripping surface 201Ab that faces the curved opposing part 203. The wall portion 201B has a hole 201C for inserting a support pin 206 that rotatably supports the cam portion 204, and a hole 201D for inserting a support pin 206 that rotatably supports the flat opposing part 202 and the curved opposing part 203.

[0041] As shown in FIG. 15 , the cam portion 204 has an operation convex portion 204A, a through hole 204B, and contact surfaces 204C and 204D. The operation convex portion 204A is provided on the side surface of the cam portion 204 and is a portion for operating the state of the cam portion 204. The through hole 204B is a hole into which a support pin 206 for supporting the rotation of the cam portion 204 is inserted. The contact surface 204C is a surface that contacts the surface of the flat opposing component 202 facing in the positive direction of the Y axis. The contact surface 204D is a surface that contacts the surface of the curved surface opposing component 203 facing in the positive direction of the Y axis. When the operation convex portion 204A is rotated clockwise in FIG. 15A , the contact surface 204C can contact the flat opposing component 202 before the contact surface 204D contacts the curved surface opposing component 203. As a result, when the cam portion 204 is operated, the gripping portion 20 first grips the guide wire GW with the flat opposing part 202 and the main body portion 201, and then operates to grip the guide wire GW with the curved opposing part 203 and the main body portion 201.

[0042] The planar opposing part 202 has a gripping surface 202A and a through-hole 202B. The gripping surface 202A is a surface facing the positive direction of the Y-axis that grips the guidewire GW, and has a planar shape corresponding to the planar gripping surface 201Aa of the main body 201. A rubber member may be attached to the gripping surface 202A. The through-hole 202B is a hole into which a support pin 206 for supporting the rotation of the planar opposing part 202 is inserted.

[0043] The curved surface opposing part 203 has a gripping surface 203A and a through hole 203B. The curved surface opposing part 203 is disposed on the negative side of the X-axis relative to the flat surface opposing part 202. The gripping surface 203A is a surface on the positive side of the Y-axis that grips the guidewire GW, and has a curved shape corresponding to the curved gripping surface 201Ab of the main body part 201. This curved surface intersects with the X-axis. The through hole 203B is a hole into which a support pin 206 is inserted to support the curved surface opposing part 203 for rotation.

[0044] The grip release spring 205 is arranged to be biased so as to increase the gap between the opposing surfaces of the main body 201 and the flat opposing component 202 and the gap between the opposing surfaces of the main body 201 and the curved opposing component 203. In this embodiment, when the flat opposing component 202 and the curved opposing component 203 are not pressed down by the cam portion 204, the grip release spring 205 acts to increase the gap between the opposing surfaces of the main body 201 and the flat opposing component 202 and the gap between the opposing surfaces of the main body 201 and the curved opposing component 203.

[0045] The support pin 206 is a cylindrical member having a head 206A at a first end and a groove 206B at a second end opposite the first end into which a retaining ring 207 is fitted.

[0046] The retaining ring 207 is fitted in the groove 206B of the support pin 206 to prevent the support pin 206 from falling out of the holes 201C and 201D.

[0047] The gripping unit 20 is assembled as follows. First, with the grip release spring 205 installed in the main body 201, the support pin 206 is inserted into the hole 201D in the positive direction of the X axis of the main body 201, the through hole 202B in the flat opposing component 202, the through hole 203B in the curved opposing component 203, and the hole 201D in the negative direction of the X axis of the main body 201, and a retaining ring 207 is attached to the groove 206B of the support pin 206. Next, the support pin 206 is inserted into the hole 201C in the positive direction of the X axis of the main body 201, the through hole 204B in the cam portion 204, and the hole 201C in the negative direction of the X axis of the main body 201, and a retaining ring 207 is attached to the groove 206B of the support pin 206. This completes the gripping unit 20 shown in FIG. 13 .

[0048] Next, the state of the gripping unit 20 at each point in time during the gripping process will be described.

[0049] In a state where the guidewire GW is not being gripped (gripped state), the gripping portion 20 is in a state as shown in Fig. 16(A)(1). In this state, in the A-A cross section of the gripping portion 20, as shown in Fig. 16(A)(2), the contact surface 204C of the cam portion 204 does not press down on the surface of the planar opposing part 202 facing the positive direction of the Y axis, and the gripping surface 202A of the planar opposing part 202 and the planar gripping surface 201Aa of the main body part 201 are separated from each other to such an extent that the guidewire GW cannot be gripped.

[0050] Furthermore, in the B-B cross section of the gripping portion 20, as shown in Figure 16 (A) (3), the contact surface 204D of the cam portion 204 is not in contact with the surface of the curved surface opposing part 203 in the positive direction of the Y axis, and the gripping surface 203A of the curved surface opposing part 203 and the curved gripping surface 201Ab of the main body portion 201 are so far apart that the guide wire GW cannot be gripped.

[0051] Thereafter, when the operation convex portion 204A of the cam portion 204 is rotated in the positive direction of the Z axis, the contact surface 204C of the cam portion 204 presses down on the surface of the planar opposing part 202 facing in the positive direction of the Y axis, and the gripping portion 20 assumes the state shown in FIG. 16(B)(1). In this state, as shown in FIG. 16(B)(2) in the A-A cross section of the gripping portion 20, the contact surface 204C of the cam portion 204 contacts and presses down on the surface of the planar opposing part 202 facing in the positive direction of the Y axis, and the distance between the gripping surface 202A of the planar opposing part 202 and the planar gripping surface 201Aa of the main body 201 is set to a distance that allows the guidewire GW to be gripped (for example, a distance narrower than the diameter of the guidewire GW). As a result, the guidewire GW is gripped between the gripping surface 202A of the planar opposing part 202 and the planar gripping surface 201Aa of the main body 201. Here, the guidewire GW and the gripping surface 202A of the planar opposing part 202 are arranged parallel to each other in advance, and the guidewire GW is gripped by a plane between the gripping surface 202A of the planar opposing part 202 and the planar gripping surface 201Aa of the main body 201, so no positional deviation occurs in the X-axis direction relative to the guidewire GW.

[0052] On the other hand, in the B-B cross section of the gripping portion 20, as shown in Figure 16 (B) (3), the contact surface 204D of the cam portion 204 does not press down on the surface of the curved surface opposing part 203 in the positive direction of the Y axis, and the gripping surface 203A of the curved surface opposing part 203 and the curved gripping surface 201Ab of the main body portion 201 are so far apart that the guide wire GW cannot be gripped.

[0053] After this, when the operation convex portion 204A of the cam portion 204 is further rotated in the positive direction of the Z axis, the contact surface 204D of the cam portion 204 presses down on the surface of the curved surface opposing part 203 facing in the positive direction of the Y axis, and the gripping portion 20 assumes the state shown in FIG. 16(C)(1). In this state, the gripping portion 20 maintains a state in which the contact surface 204C of the cam portion 204 presses down on the surface of the flat surface opposing part 202 facing in the positive direction of the Y axis, as shown in FIG. 16(C)(2) in the A-A cross section, and a distance between the gripping surface 202A of the flat surface opposing part 202 and the flat gripping surface 201Aa of the main body portion 201 is maintained such that the guidewire GW can be gripped. As a result, the guidewire GW is gripped between the gripping surface 202A of the flat surface opposing part 202 and the flat gripping surface 201Aa of the main body portion 201.

[0054] 16(C)(3), in the B-B cross section of the gripping portion 20, the contact surface 204D of the cam portion 204 presses down on the surface of the curved surface opposing part 203 in the positive direction of the Y axis, and a distance (e.g., a distance narrower than the diameter of the guidewire GW) is formed between the gripping surface 203A of the curved surface opposing part 203 and the flat gripping surface 201Aa of the main body part 201 that allows the guidewire GW to be gripped. As a result, the guidewire GW is gripped between the gripping surface 203A of the curved surface opposing part 203 and the curved gripping surface 201Ab of the main body part 201. Here, the guidewire GW is gripped between the gripping surface 203A of the curved opposing part 203 and the curved gripping surface 201Ab of the main body part 201, and therefore the guidewire GW moves by following the shape of the gripping surface, resulting in a positional deviation of the guidewire GW in the X-axis direction by the length of the movement. However, in this case, the guidewire GW is already gripped by the gripping surface 202A of the flat opposing part 202 and the flat gripping surface 201Aa of the main body part 201 in the positive direction of the X-axis relative to the gripping surface 203A of the curved opposing part 203, so no positional deviation occurs, and there is no effect on the length of the guidewire GW in the positive direction of the X-axis relative to the gripping part 203.

[0055] Although the gripping unit 20 uses the cam portion 204 to shift the timing at which the guidewire GW is gripped by the flat surface opposing part 202 and the curved surface opposing part 203, the present invention is not limited to this. For example, the upper parts (positive direction of the Y axis) of the flat surface opposing part and the curved surface opposing part may be formed so that the length in the positive direction of the Y axis increases as the length approaches the negative direction of the X axis, and the movable part may be moved from the positive side of the flat surface opposing part toward the negative direction of the X axis so as to come into contact with the upper parts of the flat surface opposing part and the curved surface opposing part, thereby shifting the timing at which the guidewire GW is gripped by the flat surface opposing part and the curved surface opposing part.

[0056] In the wire feeding device 1, the lever 31, the links 35, 37, the joints 36, 38, and the slider 13 constitute a power transmission mechanism.

[0057] The lever 31 is a part that is manually rotated by an operator using the wire feeding device 1. The lever 31 is rotatable about a lever rotation axis 31O. As shown in Fig. 6, the lever 31 and the cylindrical portion 35A of the link 35 are connected via a joint (not shown) so that a rotational force can be transmitted from the lever 31 to the link 35. In this embodiment, the link 35 is configured to rotate integrally with the rotation of the lever 31.

[0058] 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.

[0059] 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 along the X axis of the slider 13. In this embodiment, the rotation angle of the lever 31 and the lengths of the links 35 and 37 are adjusted so that the slider 13 can move throughout the entire range of movement in the X axis direction within the range in which the lever 31 can rotate.

[0060] When the slider 13 moves from the most extreme position in the X-axis direction of its movement range toward the base end, the hammer hook 14A engages with the convex portion 11C of the hammer 11. Further movement moves the hammer 11 toward the base end, compressing the compression spring 12. When the slider 13 approaches the most extreme position, the convex portion 15B of the slider trigger 15 moves over the hook 17A of the slider lock 17 in the negative direction of the X-axis, and the two engage. This compresses the compression spring 12, preventing the slider 13 from moving in the positive direction of the X-axis. When the injection switch 45 is subsequently pressed in the positive direction of the Y-axis, the convex portion 45B presses the convex portion 14B of the hook 14 in the positive direction of the Y-axis, deforming the portion of the hook 14 on the positive side of the X-axis in the positive direction of the Y-axis, and the engagement between the hammer hook 14A of the hook 14 and the convex portion 11C 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.

[0061] Next, the method of use and operation of the wire feeding device 1 will be specifically described with reference to the drawings. Fig. 17 is a top cross-sectional view of the wire feeding device in a state ready for feeding, Fig. 18 is a side cross-sectional view in the state ready for feeding, Fig. 19 is a top cross-sectional view of the wire feeding device during feeding, Fig. 20 is a bottom cross-sectional view of the wire feeding device during feeding, Fig. 21 is a top cross-sectional view of the wire feeding device at the start of slider movement after feeding, and Fig. 22 is a top cross-sectional view of the wire feeding device after the start of slider movement. The wire feeding device 1 is configured such that the gripping portion 20, the hammer 11, the slider 13, the hook 14, and the slider trigger 15 are interlocked to perform the following operations in this order: (a) gripping the guidewire GW, (b) moving the gripping portion 20 toward the distal end of the guidewire GW, and (c) releasing the gripping of the guidewire GW and moving the gripping portion 20 toward the proximal end.

[0062] First, the operator inserts the guidewire GW into a blood vessel and then advances 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 advances 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 proximal end 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.

[0063] 7 , the operation convex portion 204A of the gripping portion 20 is in a position where the guidewire GW is not gripped by the gripping portion 20, i.e., where the distance between the gripping surface 201A of the main body 201 and the gripping surfaces 202A, 203A of the flat opposing part 202 and the curved opposing part 203 is greater than the diameter of the guidewire GW, thereby forming an arrangement space. Therefore, as described above, by attaching 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 reduces the preparation time for delivering the guidewire GW using the wire delivery device 1 and reduces the burden on the patient and the operator.

[0064] Next, when the lever 31 is rotated slightly in the R1 direction in Figure 6, the slider 13, hook 14, and slider trigger 15 slide toward the base end (the negative side of the X axis). Since the convex portion 11C of the hammer 11 is engaged with the hammer hook 14A, the hammer 11 moves toward the base end as the slider 13 moves, and the compression spring 12 is compressed.

[0065] At this time, the gripper 20 is no longer pressed in the positive direction of the X-axis by the hammer 11, and the gripper 20 slides to the rear end of its movable range due to the biasing force of the return spring 16. As a result, the gripper 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. 17. This distance D corresponds to the amount of wire being fed in one stroke by the wire feed device 1. For example, if the amount of wire being fed in one stroke by the wire feed device 1 is 2 mm, the gripper 20 will slide 2 mm toward the rear end from the initial position.

[0066] At this time, the slit 13B of the extension portion 13A gradually guides the operating convex portion 204A of the gripping portion 20 to a position where it will grip the guidewire GW, so that first the guidewire GW is gripped between the gripping surface 202A of the flat opposing part 202 and the flat gripping surface 201Aa of the main body portion 201, and then the guidewire GW is gripped between the gripping surface 203A of the curved opposing part 203 and the curved gripping surface 201Ab of the main body portion 201.

[0067] Furthermore, when the lever 31 is rotated in the R1 direction, the slider 13, hook 14, and slider trigger 15 slide further toward the base end, and the hammer hook 14A remains engaged with the convex portion 11C of the hammer 11, so that the hammer 11 moves toward the base end as the slider 13, hook 14, and slider trigger 15 move, and the compression spring 12 is further compressed.

[0068] When the lever 31 is rotated to the position (delivery-enabled position) where the slider 13 is located at the most proximal end of its range of movement, the slider 13 slides toward the proximal end, and as shown in FIG. 17 , the convex portion 15B of the slider trigger 15 climbs over the hook 17A of the slider lock 17, engaging the convex portion 15B with the hook 17A. This maintains the compressed state of the compression spring 12, resulting in a delivery-enabled state (compression-maintained state: delivery-enabled state). Note that in this state, even if the operator attempts to rotate the lever 31 in the direction opposite to R1, the convex portion 15A of the slider trigger 15 is in contact with the convex portion 11C of the hammer 11, preventing the slider trigger 15 from rotating counterclockwise. Therefore, the engagement between the convex portion 15B and the hook 17A is maintained, and the slider 13 remains immovable in the positive direction of the X axis.

[0069] Thereafter, when the operator presses the operating portion 45A of the injection switch 45 in the positive direction of the Y axis, as shown in FIG. 20, the convex portion 45B presses the convex portion 14B of the hook 14 in the positive direction of the Y axis, the portion of the hook 14 on the positive side of the X axis bends in the positive direction of the Y axis, and the hammer hook 14A moves in the positive direction of the Y axis as shown in FIG. 19, and the state in which the hammer hook 14A is engaged with the convex portion 11C of the hammer 11 is released.

[0070] As a result, the biasing force of the compression spring 12 is applied all at once to moving the hammer 11 toward the tip, causing the hammer 11 to move toward the tip, and the tip side of the hammer 11 to collide with the base end side of the grip portion 20.

[0071] 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 gripping portion 20 maintains the state of gripping the guidewire GW.

[0072] Therefore, the gripping portion 20 moves from the rearmost position to the most distal position while maintaining the state of gripping the guidewire GW. As a result, the guidewire GW is advanced toward the distal end by a distance D from the rearmost position of the gripping portion 20 to the most distal position.

[0073] Thereafter, when the operator rotates the lever 31 in the direction opposite to R1, the convex portion 15A of the slider trigger 15 is no longer in contact with the convex portion 11C of the hammer 11, and the slider trigger 15 is now rotatable counterclockwise, as shown in Fig. 21 , so that the engagement between the convex portion 15B and the hook 17A is released, and the slider 13 moves in the positive direction of the X-axis. Thereafter, the slider trigger 15 is rotated clockwise by the return spring 15D, returning it to the state shown in Fig. 22. In this state, when the operator further rotates the lever 31 in the direction opposite to R1, the slider 13, the hook 14, and the slider trigger 15 move further in the positive direction of the X-axis, and the wire feeding device 1 can be returned to the initial state shown in Figs. 5 and 7.

[0074] In this way, when the slider 13, hook 14, and slider trigger 15 are returned to their initial states, the slit 13B of the extension portion 13A guides the operating convex portion 204A of the gripping portion 20 to a position where it releases the grip of the guidewire GW, as shown in Figure 7.Therefore, first, the grip of the guidewire GW is released between the gripping surface 203A of the curved opposing part 203 and the curved gripping surface 201Ab of the main body portion 201, and then the grip of the guidewire GW is released between the gripping surface 202A of the flat opposing part 202 and the flat gripping surface 201Aa of the main body portion 201.As a result, it becomes possible to adjust the guidewire GW, etc.

[0075] The operations up to this point correspond to the single-shot mode operation 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, the hook 14, and the slider trigger 15. Then, by pressing the ejection switch 45, (b) the deformation of the compression spring 12 is released and the gripping portion 20 gripping the guidewire GW is delivered toward the distal end by biasing the compression spring 12, and then (c) the gripping is released, thereby delivering the guidewire GW.

[0076] If the guidewire GW needs to be continuously delivered, the lever 31 can be continuously rotated and the same operation can be performed. By maintaining the ejection switch 45 in a pressed state, the wire delivery device 1 can be operated in continuous mode. When the ejection switch 45 is maintained in a pressed state to set the continuous mode, the operator operates the lever 31 and compresses the compression spring 12. Because the convex portion 45B of the ejection switch 45 presses the convex portion 14B, the hammer hook 14A of the hook 14 disengages from the convex portion 11C of the hammer 11, causing the hammer 11 to collide with the gripping portion 20. As a result, the guidewire GW can be delivered toward the distal end. Thereafter, by continuously operating the lever 31, the operator can continuously deliver the guidewire GW toward the distal end. That is, the above-described series of operations (a), (b), and (c) can be repeated in this order.

[0077] In this way, with the wire delivery device 1, an impact force due to the biasing force accumulated in the compression spring 12 is applied to the guidewire GW, and an appropriate amount of the guidewire GW can be delivered. Since an impact force can be applied to the guidewire GW in this way, the guidewire GW can effectively penetrate the obstruction.

[0078] Next, the configuration and operation of the peripheral parts of the gripping open / close switch 40 for releasing the grip of the guidewire GW gripped by the gripping portion 20 will be described. Fig. 23 is a perspective view of the gripping open / close switch in a closed state, Fig. 24 is a perspective view of related parts when the gripping open / close switch is in a closed state, Fig. 25 is a perspective view of the gripping open / close switch in an open state, and Fig. 26 is a perspective view of related parts when the gripping open / close switch is in an open state. Note that Fig. 23 shows the state immediately after the wire feeding device 1 has entered a feedable state as shown in Figs. 17 and 18.

[0079] The grip open / close switch 40 includes an operation portion 41, a first link portion 42, a second link portion 43, and a third link portion 44. Here, the first link portion 42, the second link portion 43, and the third link portion 44 correspond to link members. The operation portion 41 is disposed on the negative side of the X-axis relative to the grip portion 20 outside the housing 2 and receives operation by the operator. A close operation portion 41A on the positive side of the X-axis of the operation portion 41 is a portion that is pressed when the grip portion 20 grips the guidewire GW, and an open operation portion 41B on the negative side of the X-axis of the operation portion 41 is a portion that is pressed when the grip portion 20 releases the grip of the guidewire GW. The operation portion 41 has a convex portion 41C that protrudes in the negative direction of the Y-axis.

[0080] The first link portion 42 is disposed on the negative Y-axis side of the operating portion 41. The first link portion 42 has a cylindrical portion 42A on the positive X-axis side that protrudes in the positive Y-axis direction, and a connecting portion 42B on the negative X-axis side that rotatably connects the protrusion 41C.

[0081] The third link portion 44 is disposed on the positive side of the Y axis of the gripping portion 20, has a cylindrical portion 44A on the positive side of the Y axis that protrudes in the positive direction of the Y axis, and has a housing portion 44B on the negative side of the Y axis that houses the operation convex portion 204A of the gripping portion 20. Note that, when the wire feeding device 1 is in a state immediately after it has entered a feedable state as shown in Fig. 17 , the housing portion 44B is in a position on the negative side of the Z axis (gripping position) when the operation convex portion 204A grips the guidewire GW.

[0082] The second link portion 43 has a generally triangular prism shape and includes a rotary shaft mounting portion 43A, a protrusion accommodating portion 43B, and a protrusion accommodating portion 43C at each vertex of the triangle. The rotary shaft mounting portion 43A is a portion for rotatably connecting the second link portion 43 to the housing 2 via the screw 7. The protrusion accommodating portion 43B accommodates the cylindrical portion 42A, and the protrusion accommodating portion 43C accommodates the cylindrical portion 44A.

[0083] 24 , when the closing operation portion 41A of the operation portion 41 is pressed in the M1 direction, the first link portion 42 moves in the M2 direction, and with the movement of the first link portion 42, the second link portion 43 rotates in the R3 direction, and with the rotation of the second link portion 43, the third link portion 44 moves in the M3 direction. As a result, the operation convex portion 204A of the gripping portion 20 is positioned to grip the guidewire GW (gripping position). As a result, the gripping portion 20 grips the guidewire GW.

[0084] 26 , when the opening operation portion 41B of the operation portion 41 is pressed in the M4 direction, the first link portion 42 moves in the M5 direction, and the movement of the first link portion 42 causes the second link portion 43 to rotate in the R4 direction, and the rotation of the second link portion 43 causes the third link portion 44 to move in the M6 ​​direction. As a result, the operation convex portion 204A of the gripping portion 20 is positioned at a position (grip release position) for releasing the grip of the guidewire GW. As a result, the gripping portion 20 is no longer gripping the guidewire GW.

[0085] In this way, with the wire feeding device 1, by pressing the open operation portion 41B of the gripping open / close switch 40, the grip 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. 17. Therefore, after the wire feeding device 1 is in a feedable state, the grip of the guidewire GW by the gripping unit 20 can be released, and adjustments such as changes in the position and orientation of the guidewire GW can be easily made.

[0086] Next, a wire feeding device 1A according to a modified example will be described. The wire feeding device 1A is the wire feeding device 1 in which the gripping open / close switch has a different configuration.

[0087] Fig. 27 is a perspective view of a grip open / close switch according to a modified example in a closed state, Fig. 28 is a perspective view of a link portion of the grip open / close switch, and Fig. 29 is a perspective view of the grip open / close switch in an open state. Fig. 27 shows the state immediately after the wire feeding device 1 has entered the wire feeding ready state as shown in Fig. 17.

[0088] The grip open / close switch 70 according to the modified example includes an operation portion 71, a link portion 72, and a third link portion 44. The operation portion 71 is disposed on the negative side of the X-axis relative to the grip portion 20 outside the housing 2, and is operated by the operator. A close operation portion 71A on the positive side of the X-axis of the operation portion 71 is a portion that is pressed when the grip portion 20 grips the guidewire GW, and an open operation portion 71B on the negative side of the X-axis of the operation portion 41 is a portion that is pressed when the grip portion 20 releases the grip of the guidewire GW. The operation portion 71 has a cylindrical protrusion 71C that protrudes in the negative direction of the Y-axis.

[0089] The link portion 72 has a protrusion accommodating portion 72A, a rotary shaft mounting portion 72B, and an operation protrusion accommodating portion 72C. The protrusion accommodating portion 72A accommodates the protrusion 71C of the operation part 71 and has an elongated hole that allows the distance between the protrusion 71C and the rotary shaft mounting portion 72B to be variable. The rotary shaft mounting portion 72B is a portion for rotatably connecting the link portion 72 to the housing 2 via the pin 8. The operation protrusion accommodating portion 72C has an opening that accommodates the cylindrical portion 44A of the third link portion 44.

[0090] 27 , when the closing operation portion 71A of the operation portion 71 is pressed in the M7 direction, the protrusion 71C moves in the M8 direction. As the protrusion 71C moves, the link portion 72 rotates in the R4 direction around the pin 8. As a result, the operation protrusion accommodating portion 72C moves in the M9 direction, and the cylindrical portion 44A also moves in the M9 direction. As a result, the operation protrusion 204A of the gripping portion 20 is positioned to grip the guidewire GW (gripping position). As a result, the gripping portion 20 grips the guidewire GW.

[0091] 29, when the opening operation portion 71B of the operation portion 71 is pressed in the M10 direction, the convex portion 71C moves in the M11 direction, and as the convex portion 71C moves, the link portion 72 rotates in the R5 direction around the pin 8, whereby the operation convex portion accommodating portion 72C moves in the M12 direction, and the cylindrical portion 44A also moves in the M12 direction. As a result, the operation convex portion 204A of the gripping portion 20 is positioned at a position (grip release position) for releasing the grip of the guidewire GW. As a result, the gripping portion 20 is no longer gripping the guidewire GW.

[0092] In this way, with the wire feeding device 1A, by pressing the open operation portion 71B of the gripping open / close switch 70, the grip 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. 17. Therefore, after the wire feeding device 1 is in a feedable state, the grip of the guidewire GW by the gripping unit 20 can be released, and adjustments such as changes in the position and orientation of the guidewire GW can be easily made.

[0093] 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 thereof, for example, the following modifications are also possible.

[0094] In the above embodiment, a metal spring is used as the compression spring 12, but other types of elastic bodies such as rubber cords or leaf springs may also be used, and the elastic bodies may be made of a resin material. Although the tip 11A of the hammer 11 is made of resin, the entire hammer may be made of metal or resin.

[0095] Although the biasing force of the hammer 11 toward the distal end is increased by moving the hammer 11 and compressing the compression spring 12, for example, an elastic body may be provided that expands in response to the movement of the base end side of the hammer 11, and the biasing force may be increased by the expansion of the elastic body. Alternatively, for example, the grip portion 20 may be directly moved toward the distal end by the compression spring 12 without using the hammer 11.

[0096] A mechanism for adjusting the movable range of the gripper 20 in the X-axis direction, 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.

[0097] A mechanism for adjusting the amount of compression of the compression spring 12 in its initial state may be provided, for example, a mechanism for moving the position of the wall on the base end side of the compression spring 12. In this way, the impact force applied to the gripping portion 20 by the hammer 11 in the wire feeding device can be easily and appropriately adjusted. Also, in the above-described embodiment, it is assumed that the compression spring 12 is not compressed at all in its initial state, but the compression spring 12 may be slightly compressed in its initial state.

[0098] In the past, the operator manually rotated the lever 31 to deliver the guidewire GW, but it may also be delivered by an electrically powered motor. 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 has been rotated a predetermined angle. For example, a switch for driving the motor may be provided, and pressing this switch once may drive the motor enough to rotate the link 35 a predetermined angle.

[0099] The present invention is not limited to the configurations of the above-described embodiments, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0100] DESCRIPTION OF SYMBOLS 1, 1A Wire feeding device 2 Housing 2A Grip accommodating portion 2B Slider accommodating portion 2C Support hole 2E Grip 2F Misoperation prevention wall 2J Rib 3 Connector connection portion 3A, 3B Connection piece 4 Guide wire accommodating portion 7 Screw 8 Pin 11 Hammer 11A Tip portion 11B Metal portion 11C Convex portion 12 Compression spring 13 Slider 13A Extension portion 13B Convex portion 13C Mounting portion 13D Connection portion 14 Hook 14A Hammer hook 14B Convex portion 15 Slider trigger 15A Convex portion 15B Convex portion 15C Connection portion 15D Return spring 16 Return spring 17 Slider lock 17A Hook 20 Grip portion 31 Lever 31O Lever rotation axis 35, 37 Link 35A Cylindrical portion 36, 38 Joint 40 Grip open / close switch 41 Operation portion 41A Close operation portion 41B Open operation portion 41C Convex portion 42 First link portion 42A Cylindrical portion 42B Connecting portion 43 Second link portion 43A Rotation shaft mounting portion 43B Convex portion accommodating portion 43C Convex portion accommodating portion 44 Third link portion 44A Cylindrical portion 44B Storage portion 45 Injection switch 45A Operation portion 45B Convex portion 45C Fixing hole 45D Spring accommodating portion 46 Screw 51 Catheter 52 Catheter hub 52A Rear end portion 60 Connector 60A Dial portion 60B Through hole 60C Mounting portion 60D Rear end portion 70 Grip open / close switch 71 Operation portion 71A Closing operation portion 71B Opening operation portion 71C Convex portion 72 Link portion 72A Convex portion accommodating portion 72B Rotating shaft mounting portion 72C Operation convex portion accommodating portion 80 Opening / closing portion 81 Lid 81A Lid portion 81B Rotating operation portion 81C Opening portion 82 Shaft 201 Main body portion 201A Grip surface 201Aa Flat grip surface 201Ab Curved grip surface 201B Wall portion 201C,201D Hole 202 Flat opposing part 202A Gripping surface 202B Through hole 203 Curved opposing part 203A Gripping surface 203B Through hole 204 Cam portion 204A Operation convex portion 204B Through hole 204C, 204D Contact surface 205 Gripping release spring 206 Support pin 206A Head portion 206B Groove portion 207 Retaining ring GW Guide wire,

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 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 an urging force of the elastic body, the deformation of which is released by the release portion, and the wire gripped by the gripping portion is fed in the distal direction, The gripping portion has a first gripping portion and a second gripping portion, and the first gripping portion and the second gripping portion are configured to be able to grip the wire at different timings. Wire delivery device.

2. The first gripping portion is disposed in the distal end direction relative to the second gripping portion.

2. The wire delivery device of claim 1.

3. The first gripping portion is formed to grip the wire in a plane, The second gripping portion is formed to grip the wire with a curved surface. The wire feeding device according to claim 1 or 2.