WO2013141347A1 - Puncture tool - Google Patents

Puncture tool Download PDF

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Publication number
WO2013141347A1
WO2013141347A1 PCT/JP2013/058243 JP2013058243W WO2013141347A1 WO 2013141347 A1 WO2013141347 A1 WO 2013141347A1 JP 2013058243 W JP2013058243 W JP 2013058243W WO 2013141347 A1 WO2013141347 A1 WO 2013141347A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle hub
inner needle
protector
outer needle
cylinder
Prior art date
Application number
PCT/JP2013/058243
Other languages
French (fr)
Japanese (ja)
Inventor
壽美 玉野
聡 住吉
中島　淳
悠佑 京極
Original Assignee
三菱鉛筆株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2012220073A external-priority patent/JP6144891B2/en
Priority claimed from JP2012220072A external-priority patent/JP6144890B2/en
Priority claimed from JP2013056568A external-priority patent/JP6144936B2/en
Priority claimed from JP2013056567A external-priority patent/JP6030011B2/en
Application filed by 三菱鉛筆株式会社 filed Critical 三菱鉛筆株式会社
Priority to US14/384,276 priority Critical patent/US9782199B2/en
Priority to CN201380016113.4A priority patent/CN104203328B/en
Publication of WO2013141347A1 publication Critical patent/WO2013141347A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0631—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0637—Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin

Definitions

  • the present invention relates to a puncture device, and more particularly to a puncture device for placing an outer needle (catheter) in a blood vessel.
  • a puncture device for placing an outer needle (catheter) as described in Patent Documents 1 and 2 in a blood vessel.
  • a puncture device includes an outer needle, an outer needle hub that holds the outer needle, an inner needle that has a distal end inserted into the outer needle, and a cylindrical inner needle that holds the proximal end portion of the inner needle inside. With a hub.
  • the puncture device 100 includes an outer needle 102a, an outer needle hub 102b, an inner needle 103 into which a distal end is inserted into the outer needle 102a, and a proximal end portion of the inner needle 103 as an inner portion. And a cylindrical inner needle hub 101 that is held in the cylinder.
  • the slide cover 104 is housed in the inner needle hub 101, and the distal end 103a of the inner needle 103 protrudes from the distal end of the outer needle 102a.
  • the patient's body 110 is punctured (puncture needle).
  • the slide cover 104 is extended by pulling the inner needle hub 101 toward the hand with the outer needle 102a stabbed in the body, The tip 103a of the inner needle comes out of the body (see FIG. 50C). Further, by pulling the inner needle hub 101 in the same direction, the tip 103a of the inner needle 103 is held in the slide cover 104 without touching the hand.
  • the inner needle hub 101 is rotated in the circumferential direction (see FIG. 50D), the entire slide cover 104 rotates in the same direction, and the distal end side holder 105 is released (removed). ).
  • the outer needle 102a can be left in the body, the inner needle hub 101 containing the inner needle 103 can be removed, and the inner needle 103 can be discarded as it is (see FIG. 50E).
  • a hand is placed on the inner needle by pressing a pressing piece provided on the inner needle hub with the outer needle stabbed in the body.
  • the inner needle can be accommodated inside the inner needle hub without being touched.
  • the present invention has been made to solve the above technical problem, and prevents parts constituting the puncture tool from being damaged by buckling (bending) or the like, ensuring safety,
  • An object of the present invention is to provide a puncture device that can be easily handled even by a user who does not have the problem.
  • the puncture device made to solve the above technical problem includes an outer needle, an outer needle hub that holds a proximal end portion of the outer needle, and an inner needle in which a distal end portion is inserted into the outer needle.
  • An inner needle hub that holds the proximal end portion of the inner needle, an outer cylinder that is movably attached to the inner needle hub, and a gripping means that grips the outer needle hub.
  • at least the outer cylinder is made of a soft synthetic resin material.
  • the outer cylinder is formed of a soft synthetic resin material, the outer cylinder is bent by the bending force, but breakage such as cracking can be prevented. Further, as a result of preventing the outer cylinder from being damaged, there is no fear that the outer cylinder is detached from the inner needle hub and the inner needle is exposed, and safety can be ensured.
  • the inner cylinder is formed of a soft synthetic resin material.
  • the inner needle hub is preferably formed of a soft synthetic resin material.
  • the soft synthetic resin material is preferably a synthetic resin having an elongation percentage of 100% or more.
  • the soft synthetic resin material is preferably polypropylene.
  • the sliding resistance can be reduced, so that the inner needle hub can be pulled out with a small force. Even a weak user can easily handle it.
  • FIG. 1 is a perspective view showing an appearance of a puncture device according to the first embodiment of the present invention.
  • FIG. 2 is a perspective view showing a state where the protector of the puncture device in FIG. 1 is removed.
  • FIG. 3 is an exploded perspective view excluding the protector of the puncture device according to FIG. 1.
  • 4 is a longitudinal sectional view showing the puncture device shown in FIG.
  • FIG. 5 is a longitudinal sectional view showing the puncture device of FIG. 1, and is a longitudinal sectional view different from the longitudinal sectional view of FIG. 4 in the direction of 90 degrees.
  • 6A and 6B are diagrams showing an outer cylinder, in which FIG. 6A is a perspective view, FIG. 6B is a longitudinal sectional view, and FIG.
  • FIG. 6C is a longitudinal sectional view different from the longitudinal sectional view of FIG. .
  • FIG. 7 is a perspective view showing the inner cylinder.
  • FIGS. 8A and 8B are views showing a state in which the inner cylinder is expanded, in which FIG. 8A is a plan view and FIG. 8B is a cross-sectional view taken along line AA in FIG.
  • FIG. 9 is a diagram showing a puncture state for explaining a procedure for using the puncture device shown in FIG. 1, wherein (a) is a longitudinal sectional view, and (b) is a longitudinal sectional view of (a). It is a longitudinal cross-sectional view from which a 90 degree
  • FIG. 10A and 10B are views showing a state in which the inner needle hub for explaining the procedure for using the puncture device shown in FIG. 1 is extended, wherein FIG. 10A is a longitudinal sectional view, and FIG. 2) and a vertical cross-sectional view different from each other by 90 degrees.
  • 11 is a view showing a state in which the extension of the inner needle hub for explaining the procedure of using the puncture device shown in FIG. 1 is completed, (a) is a longitudinal sectional view, and (b) is ( It is a longitudinal cross-sectional view in which the longitudinal cross-sectional view of a) differs in a 90 degree direction.
  • 12 is a view showing a state in which an outer needle for indwelling the procedure for using the puncture device shown in FIG.
  • FIG. 13 is a longitudinal sectional view showing the first embodiment, and is a diagram for explaining the movement of the outer needle.
  • FIG. 14 is a longitudinal sectional view showing the second embodiment.
  • FIG. 17 is a longitudinal sectional view showing the third embodiment.
  • FIG. 18 is a longitudinal sectional view showing a state in which the outer cylinder has been pulled out from the state shown in FIG.
  • FIG. 19 is a longitudinal sectional view showing a state in which the relay cylinder is pulled out from the state shown in FIG.
  • FIG. 20 is a plan view showing a state in which the outer cylinder according to the fourth embodiment is pulled out and bent.
  • FIG. 21 is a longitudinal sectional view according to the fourth embodiment shown in FIG.
  • FIG. 22 is a perspective view of the fifth embodiment.
  • FIG. 23 is a longitudinal sectional view of the fifth embodiment shown in FIG.
  • FIG. 24 is a perspective view showing a modification of the conventional puncture device.
  • FIG. 25 is a perspective view showing an appearance of a puncture device according to the sixth embodiment of the present invention.
  • FIG. 26 is a side view of the puncture device of FIG.
  • FIG. 27 is a perspective view showing a state where the protector of the puncture device in FIG. 25 is removed.
  • FIG. 28 is a perspective view showing a state where the puncture device of FIG. 25 is disassembled.
  • FIG. 29 is a view showing the puncture device shown in FIG. 25, wherein (a) is a longitudinal sectional view, and (b) and (a) are longitudinal sectional views different from each other by an angle of 90 °.
  • 30 is a view showing an inner needle hub of the puncture device shown in FIG. 25, wherein (a) is a side view and (b) is a longitudinal sectional view.
  • FIG. 31 is a perspective view of the inner needle hub shown in FIG. FIG.
  • FIG. 32 is a perspective view of the protector.
  • FIG. 33 is a perspective view seen from the lower side (lower surface side) of the protector.
  • FIG. 34 is a longitudinal sectional view of the protector.
  • FIG. 35 is a view of a puncture device for explaining a procedure for attaching the protector, in which (a) is a side view and (b) is a longitudinal sectional view. It is a perspective view which shows the modification of the conventional puncture device.
  • FIG. 37 is a perspective view showing an appearance of a puncture device according to the seventh embodiment of the present invention.
  • FIG. 38 is a side view of the puncture device of FIG.
  • FIG. 39 is a perspective view showing a state where the protector of the puncture device in FIG. 37 is removed.
  • FIG. 40 is a perspective view showing a state where the puncture device of FIG. 37 is disassembled.
  • FIG. 41 is a longitudinal sectional view showing the puncture device shown in FIG. 42 is a longitudinal sectional view showing the puncture device shown in FIG. 37, and is a longitudinal sectional view different from FIG. 41 by 90 °.
  • FIG. 43 is a perspective view of the protector.
  • FIG. 44 is a perspective view showing an appearance of a puncture device according to the eighth embodiment of the present invention.
  • FIG. 45 is a side view of the puncture device of FIG.
  • FIG. 46 is a perspective view showing a state where the protector of the puncture device in FIG. 1 is removed.
  • FIG. 47 is a longitudinal sectional view showing the puncture device shown in FIG.
  • FIG. 58 is a longitudinal sectional view showing the puncture device of FIG. 44 and is a longitudinal sectional view different from FIG. 57 by 90 °.
  • FIG. 49 is a perspective view of the protector.
  • FIG. 50 is a side view showing an operation state of a conventional puncture device.
  • the puncture device 1 includes an outer needle 21, an inner needle 3 into which a distal end portion (left end portion on the paper surface) is inserted into the outer needle 21, and one end portion (base) of the inner needle 3. And a protector 5 that covers the outer needle 21 and the inner needle 3. Moreover, in the puncture device 1, all parts except the inner needle 3 are made of resin. In FIG. 1, the outer needle 21 and the inner needle 3 are covered with the protector 5 and cannot be seen.
  • the catheter 2 includes an outer needle 21 made of a flexible hollow tube and an outer needle hub 22 that holds the proximal end portion of the outer needle 21 as shown in FIGS.
  • the injection device 4 is attached to a cylindrical inner needle hub 41 and a proximal end (right end of the paper surface) of the inner needle hub 41 by press fitting. And a tail plug 42 having a substantially cylindrical needle holding portion 42a for holding the end portion.
  • the injection tool 4 has an outer cylinder 6 attached to the inside of the inner needle hub 41 so as to be able to advance and retreat, and four arms 71A for gripping the outer needle hub 22. And an inner cylinder 7 attached so as to be freely advanced and retracted. In the present embodiment, the case where the four arms 71A are formed on the inner cylinder 7 is shown, but it is sufficient that the outer needle hub 22 can be held by two or more arms.
  • the outer cylinder 6 includes a groove 61 formed along the axis of the shaft 64 of the outer cylinder 6 (formed along the advancing and retreating direction of the inner cylinder 7), and the four
  • the arm opening / closing part 62 that accommodates the arm 71A is provided, and is formed in a cylindrical shape as a whole.
  • the four arms 71A are formed so as to be able to advance and retract while being guided by guide groove portions 62A formed on both sides of the inner surface of the arm opening / closing portion 62.
  • the groove 61 is formed so as to be symmetrical at two locations, the upper portion and the lower portion, on the peripheral surface of the outer cylinder 6. 4 and 5, when the inner cylinder 7 is accommodated in the outer cylinder 6, the four arms 71A are closed and the outer needle hub 22 is closed. Grip. On the other hand, when the inner cylinder 7 is pulled out (advanced) from the outer cylinder 6, as shown in FIG. 11 and FIG. 12, the restriction by the guide groove 62A (arm opening / closing section 62) is eliminated. The four arms 71A are opened by the elastic force of itself, and the outer needle hub 22 is released.
  • the four arms 71A and the arm opening / closing part 62 constitute a gripping means for gripping the outer needle hub 22, and the four arms 71A are retracted into the arm opening / closing part 62. 4 and 5, the outer needle hub 22 is gripped, and the four arms 71A are advanced from the arm opening / closing portion 62, as shown in FIGS. 12, the outer needle hub 22 is released.
  • the four arms 71 ⁇ / b> A are formed in a shape opened in advance with respect to the peripheral surface of the inner cylinder 7.
  • the arm 71A of the inner cylinder 7 is inserted (accommodated) in the guide groove 62A (see FIG. 6) of the outer cylinder 6, the four arms 71A are closed by the arm opening / closing part 62. Is in a state. That is, the arm opening / closing part 62 closes the four arms 71 ⁇ / b> A so that the four arms 71 ⁇ / b> A grip the outer needle hub 22.
  • the four arms 71A are extracted from the arm opening / closing part 62 as shown in FIGS. Return to the state. That is, the four arms 71A are opened by the arm opening / closing part 62, and the four arms 71A are in a state of releasing the catheter 2.
  • the inner cylinder 7 passes through a neck portion 71 having the four arms 71 ⁇ / b> A, a shaft portion 72 having a diameter smaller than that of the neck portion 71, and the centers of the neck portion 71 and the shaft portion 72. And it has the through-hole 73 which penetrates the said inner needle 3, and is shape
  • the shaft portion 72 is pushed up by the protruding portion 72 ⁇ / b> A movably accommodated in the groove portion 61 of the outer cylinder 6 and the inner needle 3 in the through hole 73, and engages with the groove portion 61. And an upright piece 72B.
  • the protrusions 72A are formed so as to be symmetrical at two locations on the upper surface and the lower surface of the shaft portion 72 so as to correspond to the groove portions 61 (see FIG. 5).
  • the groove 61 and the protrusion 72 ⁇ / b> A regulate the advance / retreat direction of the inner cylinder 7 relative to the outer cylinder 6 (the advance / retreat direction of the outer cylinder 6 relative to the inner cylinder 7).
  • the protruding portion 72A is engaged with the end of the groove 61 so that the outer cylinder 6 and the inner cylinder 7 are not separated from each other. It is configured to be.
  • the inner cylinder 7 includes a lower portion 7A (left side of the paper surface) provided with the upright piece 72B, and an upper portion 7B (right side of the paper surface) formed on the opposite side across the center line l. Are formed by folding the upper part 7A and the lower part 7B around a fold line (center line 1).
  • groove portions 73A and 73B having a semicircular cross section are formed along the axial direction of the inner cylinder 7, respectively. These groove portions 73A and 73B are formed with one through-hole 73 by folding the lower portion 7A and the upper portion 7B.
  • the upright piece 72 ⁇ / b> B is pushed out by the peripheral surface of the inner needle 3 when the inner needle 3 is inserted (accommodated) into the through-hole 73, and stands. Engage with the end of the groove 61.
  • the upright piece 72B engages with the end portion on the catheter 2 side of the groove portion 61, so that it cooperates with the neck portion 71 of the inner cylinder 7 so as to sandwich the outer cylinder 6 therebetween. Locked to the outer cylinder 6.
  • the upright piece 72 ⁇ / b> B is raised by the inner needle 3, and the outer cylinder 6 and the inner cylinder 7 are integrated, and the Drawing from the outer cylinder 6 is restricted.
  • the upright piece 72B is housed in the inner cylinder 7 so as to close the through hole 73 when the inner needle 3 is pulled out from the through hole 73 and is not pushed out by the inner needle 3. (Reset), the engagement with the groove 61 is released. In other words, the standing piece 72B is not locked to the outer cylinder 6 when the inner needle 3 is not present in the through-hole 73, so that the outer cylinder 6 and the inner cylinder 7 can be separated, and the outer The inner cylinder 7 can be extracted from the cylinder 6.
  • the inner needle hub 41 and the end portions 41a and 63 of the outer cylinder 6 are formed with engaging portions, and when extended, the engaging portions formed on the end portions 41a and 63 are formed. By being locked, they are configured not to be separated (separated) from each other.
  • the protector 5 is removed from the puncture device 1 shown in FIGS. 1 and 4, and the catheter 2 and the inner needle 3 are exposed as shown in FIG. Then, as shown in FIG. 9, the outer needle 21 and the inner needle 3 are punctured into the blood vessel (the patient's body 110).
  • the inner needle hub 41 is moved along the axial direction in a direction away from the outer needle 21 (withdrawing operation is performed). By the pulling-out operation of the inner needle hub 41, the injection tool 4 is extended.
  • the inner needle hub 41 holding the rear end portion (base end portion) of the inner needle 3 is moved along the axial direction, the inner needle 3 is similarly moved along the axial direction. And by pulling out from the outer needle 21, the extracted inner needle 3 is covered in the inner cylinder 7, the outer cylinder 6, and the inner needle hub 41 (see FIG. 10).
  • the inner needle hub 41 is separated from the outer needle 21 along the axial direction. As shown in FIG. 11, when the tip of the inner needle 3 passes through the upright piece 72B, the upright piece 72B is not subjected to a force from the side surface of the inner needle 3, returns to the original state, and passes through the through hole 73. Block. Thereby, even if the force which moves the inner needle hub 41 to the catheter 2 side acts, the movement of the inner needle 3 is regulated by the upright piece 72B and does not return into the outer needle 21 again.
  • the outer needle hub 22 is released from the state in which the outer needle hub 22 is held by the four arms 71A and the arm opening / closing portion 62.
  • the puncture device 1 can accommodate the inner needle 3 in the inner needle hub 4 only by pulling out the inner needle 3 from the outer needle 21, and the outer needle hub 22. Can be removed from the inner needle hub 4.
  • the puncture device may include a relay cylinder that extends the inner needle hub, the outer cylinder, and the inner cylinder.
  • the cylindrical body has a gripping means for gripping the catheter, and may be attached so that it can be inserted into and retracted from the inner needle hub.
  • the gripping means is configured by the four arms 71A and the arm opening / closing unit 62 has been described as an example, but the present invention is not particularly limited to this configuration.
  • the gripping means What is necessary is just to be comprised so that a needle hub can be released.
  • the outer needle the outer needle hub that holds the proximal end portion of the outer needle, the inner needle in which the distal end portion is inserted into the outer needle
  • a puncture device comprising a cylindrical injection tool for holding a proximal end portion of an inner needle, wherein the injection tool grips an inner needle hub for holding the proximal end portion of the inner needle and the outer needle hub.
  • a cylindrical body having a gripping means and movably attached to the inside of the inner needle hub, and extending the injection device by separating the inner needle hub from the outer needle along the axial direction.
  • the gripping means releases (releases) gripping of the outer needle hub. Therefore, the outer needle hub can be removed from the inner needle hub only by the operation of pulling the inner needle out of the outer needle, and there is no risk of causing pain to the patient, and smooth removal can be easily performed. . Further, since the inner needle is always accommodated in the inner needle hub, the safety of the operator can be ensured.
  • the cylindrical body has an outer cylinder that is movably attached to the inside of the inner needle hub, and a plurality of arms that grip the outer needle hub, and is attached to the inside of the outer cylinder so as to be able to advance and retract.
  • the outer cylinder has an arm opening / closing part that opens and closes the plurality of arms by accommodating the inner cylinder inside the outer cylinder or by being pulled out of the outer cylinder.
  • the inner cylinder is opened and closed by a through hole through which the inner needle is inserted, an upright piece that is pushed out by the inner needle of the through hole and is locked to the outer cylinder, and the arm opening / closing portion.
  • a plurality of arms for gripping the catheter and by separating the inner needle hub from the outer needle along the axial direction and pulling out the inner needle, The locked state is released, and the arm opening / closing part of the outer cylinder is connected to the inner cylinder. The moved, by opening a plurality of arms for gripping the outer needle hub, it is desirable that the outer needle hub is removed from the inner needle hub.
  • the locked state of the outer cylinder and the inner cylinder by the standing piece is released, and the outer The arm opening / closing part of the cylinder can be moved with respect to the inner cylinder. Then, by moving the outer cylinder relative to the inner cylinder, the gripping state of the outer needle hub by a plurality of arms is released, and the outer needle hub is removed from the inner needle hub. That is, the inner needle can be accommodated in the inner needle hub only by pulling the inner needle out of the outer needle, and the outer needle hub can be removed from the inner needle hub.
  • a groove portion is formed on the outer peripheral surface of the outer cylinder along the axis of the outer cylinder, and a protrusion portion accommodated in the groove portion is formed on the outer peripheral surface of the inner cylinder. Therefore, it is desirable that the forward / backward direction of the outer cylinder with respect to the inner cylinder is restricted. In this case, the advancing and retreating direction of the outer cylinder with respect to the inner cylinder is regulated by the groove and the protrusion, and therefore the inner needle hub body can be pulled out in the direction away from the outer needle along the axial direction.
  • the standing piece may block the through hole of the inner needle. desirable.
  • the path to the outer needle side of the inner needle is closed by the standing piece, so the inner needle is It will not jump out of the body again. Therefore, the inner needle can be securely stored in the inner needle hub.
  • the inner needle can be accommodated in the inner needle hub only by pulling the inner needle from the outer needle, and the outer needle hub can be removed from the inner needle hub. It is possible to obtain a puncture device that can be used.
  • This embodiment is an improvement of the first embodiment described above, and prevents the outer needle hub 22 (catheter 2) from moving (backlashing) inside the protector 5. As a result, the outer needle hub 22 moves inside the protector 5 (backlash), so that the outer needle 21 covers the tip of the inner needle 2 as shown by the dotted line in FIG. Alternatively, the problem that the outer needle hub 22 cannot be removed from the inner cylinder 7 and punctured can be solved.
  • the protector 5 covering the catheter 2 and the inner needle 3 is attached by fitting with the outer peripheral surface of the inner needle hub 41, and at this time, the outer peripheral portion of the arm opening / closing portion 62 of the outer cylinder 6. Is also in pressure contact with the inner peripheral surface of the protector 5.
  • the outer needle hub 22 is held by the arm 71A of the inner cylinder 7, and the arm 71A is in pressure contact with the guide groove 62A of the arm opening / closing part 62 of the outer cylinder 6.
  • the inner peripheral surface of the protector 5 is provided with contact portions 5A, 5B, 5C, and 5D that come into pressure contact with the outer peripheral surface of the inner needle hub 41.
  • the contact portions 5 ⁇ / b> A, 5 ⁇ / b> B, 5 ⁇ / b> C, and 5 ⁇ / b> D protrude from the inner peripheral surface of the protector 5 and extend along the axis of the protector 5 in parallel with the axis.
  • the contact portions 5A, 5B, 5C, and 5D may be formed in a plurality. For example, it is preferable that four contact portions 5A, 5B, 5C, and 5D are provided as illustrated.
  • the contact portions 5A, 5B, 5C, 5D are preferably not in contact with the outer peripheral surface of the arm opening / closing portion 62 of the outer cylinder 6, but are preferably not in pressure contact even if they are in contact.
  • the pressure contact force between the outer peripheral surface of the inner needle hub 41 and the contact portions 5A, 5B, 5C, 5D is the sliding resistance between the outer peripheral surface of the inner needle hub 41 and the contact portion contact portions 5A, 5B, 5C, 5D ( The width, length, number, etc. of the contact portions are set in consideration of the pulling force.
  • An outer needle hub locking portion 5 ⁇ / b> E extending in the axial direction is provided on the inner peripheral surface of the tip portion of the protector 5.
  • the outer needle hub locking portion 5E is formed in a cylindrical shape, the tip of the inner needle 3 is located in a space portion 5F provided at the center, and the end of the outer needle hub locking portion 5E is external.
  • the needle hub 22 is configured to abut.
  • the protector 5 when the protector 5 covers the catheter 2 and the inner needle 3 (when the protector 5 is attached), the outer peripheral surface of the inner needle hub 41 and the contact portion 5A of the protector 5 5B, 5C, and 5D are press-contacted (fitted), and the outer needle hub 22 contacts the outer needle hub locking portion 5E. Therefore, when the protector 5 is mounted, the outer needle hub 22 (catheter 2) is prevented from moving forward by the outer needle hub locking portion 5E, and the outer needle hub 22 (catheter 2) is moved rearward. Is blocked by the inner needle hub 41 fitted to the protector 5. As a result, the catheter 2 is fixed and movement of the catheter 2 is prevented.
  • the contact portions 5A, 5B, 5C, and 5D are not in contact with or in contact with the arm opening / closing portion 62 of the outer cylinder 6. Therefore, even if the protector 5 moves, the arm opening / closing part 62 of the outer cylinder 6 does not move in the X direction and remains in that position. As a result, even when the protector 5 is removed, the outer needle hub 22 (catheter 2) does not move relative to the inner needle 3, so the outer needle 21 moves forward from the tip of the inner needle 3, and the inner needle It is possible to prevent adverse effects such as covering the tip of 3.
  • FIG. 17, FIG. 18, and FIG. Note that members similar to those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
  • This third embodiment is a further improvement of the above-described second embodiment.
  • a relay cylinder is provided between the inner needle hub and the outer cylinder to extend the inner cylinder, and the inner needle hub is removed from the outer needle. It is configured so that it can be stretched more.
  • a relay cylinder 8 that extends the outer cylinder 6 is provided between the inner needle hub 41 and the outer cylinder 6.
  • the relay cylinder 8 is formed in a cylindrical shape, has an outer diameter dimension that can be accommodated in the inner needle hub 41, and an inner diameter dimension that can accommodate the outer cylinder 6 therein.
  • a latching portion 8 a is formed at one end of the relay cylinder 8 and is configured to be latched by a latching portion formed at the end 63 of the outer cylinder 6.
  • a locking portion 8b is formed at the other end of the relay cylinder 8, and is configured to be locked to a locking portion formed at the end portion 41a of the inner needle hub 41.
  • a vertically long opening 8 c is formed on the outer peripheral surface of the relay cylinder 8 in parallel with the central axis of the relay cylinder 8.
  • Four openings 8 c are formed in the circumferential direction of the relay cylinder 8.
  • the relay cylinder 8 is provided with flexibility, so that the pulling operation direction of the inner needle hub 41 is an oblique direction (inner needle 3 Even when a bending force is applied to the relay cylinder 8, it is possible to prevent the relay cylinder 8 from being damaged due to buckling or the like.
  • the inner needle hub 4 can be further extended from the outer needle 21 (catheter 2), and the inner needle hub 41 can be pulled out in the direction in which the inner needle hub 41 is pulled out. Even when a bending force is applied to the relay cylinder 8 that is not on the extension line of the needle 3, the relay cylinder 8 can be prevented from being damaged due to buckling or the like.
  • the outer cylinder 6 (the shaft portion 64 of the outer cylinder 6) Bending force is applied. Therefore, when the outer cylinder 6 is formed of a hard synthetic resin material or the like, the bending force cannot be withstood, and the shaft portion 64 of the outer cylinder 6 may be buckled (bent) or damaged. . Further, when the shaft portion 64 of the outer cylinder 6 is buckled (bent) or the like and is damaged, the outer cylinder 6 may come off from the inner needle hub 41 and the inner needle 3 may be exposed.
  • the fourth embodiment is an improvement of the first embodiment, and is characterized in that at least the outer cylinder 6 is formed of a soft synthetic resin material such as polypropylene.
  • a bending force acts on the shaft portion 64 of the outer cylinder 6.
  • the outer cylinder 6 is formed of a soft synthetic resin material such as polypropylene, the shaft portion 64 of the outer cylinder 6 is bent by the bending force, but breakage such as cracking can be prevented.
  • the soft synthetic resin material which forms the outer cylinder 6 has an elongation rate of 200% or more according to JIS K7113 (plastic testing method). Specifically, polypropylene is preferable.
  • the outer cylinder 6 is formed of a soft synthetic resin material
  • the inner needle hub 41, the inner cylinder 6, and the outer needle are also preferably formed of a soft synthetic resin material such as polypropylene.
  • the inner needle hub 41 can be pulled out with a force of less than 0.8 N (Newton).
  • relay cylinder 8 described in the third embodiment may be formed of a soft synthetic resin material such as polypropylene.
  • the opening 8c described in the third embodiment is not necessarily formed.
  • the inner needle hub 41 is formed in a cylindrical shape. Therefore, when the protector 5 is removed from the puncture device 1 and the outer needle 21 and the inner needle 3 are punctured into the blood vessel (the patient's body 110), the cylindrical inner needle hub body 41 is used. However, it has been pointed out that depending on the user, it is difficult to perform the puncturing operation with the outer peripheral surface of the cylindrical inner needle hub body 41.
  • a grip portion 9 that grips in parallel with the central axis of the inner needle hub 41 is formed on the outer peripheral surface of the distal end portion of the cylindrical inner needle hub 41.
  • the grip portion 9 extends from the outer peripheral surface of the distal end portion of the inner needle hub 41 toward the catheter 2 (outer needle 21), and the distal end portion of the grip portion 9 is the distal end portion of the outer cylinder 6 (arm opening / closing portion 62). And corresponding positions.
  • the protector 5 when the protector 5 is mounted on the inner needle hub 41, the protector 5 is provided with an opening 5G in order to avoid collision between the grip portion 9 and the protector 5.
  • the opening 5G extends from the insertion end side (the end side opposite to the outer needle hub locking portion 5E) of the inner needle hub 41 to the outer needle hub locking portion 5E side. Therefore, even when the protector 5 is attached to the inner needle hub 41, the protector 5 can be attached to the inner needle hub 41 without interfering with the grip portion 9.
  • the user can grasp the grip portion 9 and thereby perform the inner needle more than when performing the puncturing operation with the inner needle hub 41.
  • 3 outer needle 21
  • the user can grasp the grip portion 9 and thereby perform the inner needle more than when performing the puncturing operation with the inner needle hub 41.
  • 3 outer needle 21
  • the user can grasp the grip portion 9 and thereby perform the inner needle more than when performing the puncturing operation with the inner needle hub 41.
  • 3 outer needle 21
  • the wing 106 becomes an obstacle when the protector is put on. That is, there is a problem that the entire outer needle hub 102b cannot be covered with the protector. Moreover, when the protector which can accommodate the wing
  • This embodiment is made in order to solve this problem. Even when the outer needle hub for holding the outer needle is provided with a wing, the protector for covering the outer needle hub is enlarged. The outer needle and the inner needle protruding from the outer needle can be protected, the positional deviation can be prevented, and a safety aspect can be secured.
  • the puncture device 1 includes a catheter 2, an inner needle 3 into which the distal end is inserted into the catheter 2, and a cylinder that holds one end (base end) of the inner needle 3. And a protector 5 that covers the distal ends of the catheter 2 and the inner needle 3. Moreover, in the puncture device 1, all parts except the inner needle 3 are made of resin.
  • the catheter 2 has an outer needle 21 formed of a flexible hollow tube and an outer needle hub 22 that holds the proximal end portion of the outer needle 21.
  • the outer needle hub 22 is integrally formed with a pair of wings 22 ⁇ / b> A (projection parts) extending on both the left and right sides thereof.
  • the pair of wings 22 ⁇ / b> A is used for fixing the wing 22 ⁇ / b> A to the patient's skin with an adhesive tape or the like and preventing the catheter 2 from being displaced.
  • the inner needle hub 41 is formed in a substantially cylindrical shape, and, as shown in FIGS. 28 to 31, a cylindrical fitting that is larger in diameter than the cylindrical diameter of the main body 41a is formed on the distal end side of the inner needle hub 41.
  • a joint portion 41b is formed.
  • the fitting portion 41 b is configured to be fitted with the protector 5.
  • An opening 41c into which the tail plug 42 is fitted is provided at the rear end portion of the inner needle hub 41, and the shaft portion 64 of the outer cylinder 6 is provided on the main body 41a side of the cylindrical fitting portion 41b.
  • a through hole 41d to be inserted is provided.
  • the outer cylinder 6 is configured to be accommodated in the main body portion 41 a and the fitting portion 41 b of the inner needle hub 41.
  • a plurality of rib-shaped protrusions 41e having an arc shape (arc shape when viewed from the tip side) in the circumferential direction are formed at the distal end portion of the outer peripheral surface of the fitting portion 41b (in the figure, four rib-shaped projections are formed). Is shown).
  • the rib-like protrusion 41e is for attaching (fixing) the protector 5 to the injection device 4 by engaging the locked protrusion 5e (see FIG. 33) formed on the protector 5.
  • adjacent rib-shaped protrusions 41e among the rib-shaped protrusions 41e are formed at a predetermined interval t as shown in FIG. That is, the four rib-like protrusions 41e are arranged symmetrically as viewed from the front end side of the inner needle hub 41 with the two rib-like protrusions 41e as a pair. And the space
  • positioned left-right symmetrically is formed in the predetermined dimension so that the to-be-guided parts 5h and 5i (refer FIG. 33) formed in the protector 5 may penetrate.
  • the rib-shaped protrusion 41e formed on the outer peripheral surface of the fitting portion 41b (on the inner needle proximal end side from the rib-shaped protrusion 41e), it is parallel to the axis along the axis of the inner needle hub 41.
  • An extended presser protrusion 41fc is provided.
  • the lower surface 41f1 of the presser protrusion 41f is disposed on an extension line of the lower surface 41e1 of the upper rib-shaped protrusion 41e among the pair of rib-shaped protrusions 41e disposed symmetrically. That is, the rib-like protrusion 41e and the pressing protrusion 41f are configured to securely hold the guided protrusions 5h and 5i formed on the protector 5.
  • the protector 5 includes a cylindrical outer needle hub locking portion 5a for accommodating the outer needle 21, and an axial direction extending from the outer needle hub locking portion 5a.
  • the main body 5b having openings 5c1 and 5c2 on the opposite end and the lower surface of the outer needle hub locking portion is formed.
  • the outer needle hub locking portion 5a is formed in a cylindrical shape on the inner peripheral surface of the distal end portion of the protector 5, and the distal end of the inner needle 3 is located in the inner space 5a1, and the outer needle hub The end portion 5 a 2 of the locking portion 5 a is configured to contact the outer needle hub 22.
  • the opening 5c1 is an opening for inserting the protector 5 into the fitting portion 41b of the inner needle hub 41.
  • the opening 5c2 is a blade 22A provided on the outer needle hub 22 when the protector 5 is mounted. It is provided to prevent interference.
  • a frame 5d is formed.
  • the rib-like frame 5d is provided with an extending portion 5d1 extending from the left and right sides of the main body portion 5b toward the outer needle hub locking portion 5a.
  • the arc-shaped rib-shaped frame 5d has a predetermined height h (dimension) so that the user can remove the protector 5 by placing his / her finger.
  • the rib-shaped frame 5d and the extending portion 5d1 of the rib-shaped frame 5d are provided in the main body 5b, whereby the mechanical strength of the protector 5 in which the openings 5c1 and 5c2 are formed can be increased. Deformation of the protector 5 can be suppressed.
  • a locked projection 5 e is formed in the circumferential direction.
  • the locking projection 5e of the protector 5 moves over the rib-shaped projection 41e formed on the outer peripheral surface of the fitting portion 41b, so that the locking projection 5e of the protector 5 becomes the rib-shaped projection 41e.
  • the protector 5 is fixed to the inner needle hub 41 (fitting portion 41a).
  • contact portions 5 f and 5 g that are in pressure contact with the outer peripheral surface of the fitting portion 41 b of the inner needle hub 41 are provided on the inner peripheral surface of the protector 5.
  • the contact portions 5f and 5g have the same configuration as the contact portions 5A to 5D shown in the second embodiment. Specifically, the contact portions 5 f and 5 g protrude from the inner peripheral surface of the protector 5 and extend along the axis of the protector 5 in parallel with the axis.
  • the contact portions 5f and 5g only need to be formed in plural, and the pressure contact force between the outer peripheral surface of the fitting portion 41b and the contact portions 5f and 5g is equal to the outer peripheral surface of the fitting portion 41b and the contact portions 5f and 5g. In consideration of the sliding resistance (pull-out force), the width, length, number, etc. of the contact portions are set.
  • the appropriate sliding resistance for example, the outer peripheral surface of the fitting portion 41b of the inner needle hub 41 is in contact with the entire inner peripheral surface of the main body portion 5b, and the sliding resistance is If it is large, the moment the user applies force and removes the protector, there is a risk that the force will be applied and the inner needle may be stabbed against itself or another person, while the sliding resistance (pull-out force) is small. Sometimes, the protector 5 may fall off from the fitting portion 41b of the inner needle hub 41. As described above, by providing the contact portions 5f and 5g on the inner peripheral surface of the protector 5 and appropriately setting the width, length, number, etc. of the contact portions, an appropriate sliding resistance force (drawing force) can be obtained. And safety can be ensured.
  • the inner peripheral surface of the protector 5 is a rib-like protrusion protruding from the inner peripheral surface of the protector 5 in parallel with the contact portions 5f and 5g (parallel to the axis along the axis of the main body 5).
  • Guided portions 5h and 5i are provided.
  • the guided portions 5h and 5i are inserted between the pair of rib-shaped protrusions 41e and guided to the rib-shaped protrusion 41e. Therefore, the thickness dimensions of the guided portions 5h and 5i are formed to be smaller than the interval t between the pair of rib-like protrusions 41e.
  • the upper surfaces of the guided portions 5h and 5i inserted through the pair of rib-like projections 41e are in contact with the lower surface of the presser projection 41f provided on the fitting portion 41b of the inner needle hub 41 (see FIG. 31).
  • the guided portions 5h and 5i are held by the pair of rib-like protrusions 41e and the pressing protrusions 41f, so that the protector 5 can be prevented from rattling.
  • the protector 5 since the mechanical strength of the opening 5c2 side on the lower surface of the protector 5 is weak, when the protector 5 is attached to the fitting portion 41b of the inner needle hub 41, the protector 5 is inclined (deformed) toward the opening 5c2 side. There is a risk. By pressing the guided portions 5h and 5i with the pressing protrusion 41f, the inclination (deformation) toward the opening of the protector 5 can be suppressed.
  • the pair of wings 22A are arranged in the opening 5c2 on the lower surface side of the protector 5, and the protector 5 is placed in the X direction (on the injection tool 4 side).
  • the guided portions 5e and 5f are inserted between the pair of rib-like projections 41e, and the guided portions 5h and 5i are moved while being guided by the rib-like projections 41e.
  • the contact portions 5f and 5g move while being pressed against the outer peripheral surface of the fitting portion 41b of the inner needle hub 41.
  • the locked protrusion 5e of the protector 5 moves over the rib-shaped protrusion 41e formed on the outer peripheral surface of the fitting portion 41b of the inner needle hub 41, whereby the locked protrusion 5g of the protector 5 becomes the rib-shaped protrusion 41e. Locked, the protector 5 is fixed to the inner needle hub 41 (fitting portion 41a).
  • the upper surfaces of the guided portions 5h and 5i inserted between the pair of rib-like projections 41e are in contact with the lower surface of the presser protrusion 41f provided on the fitting portion 41b of the inner needle hub 41, and the guided portions 5h and 5i are held by the pair of rib-like protrusions 41e and the pressing protrusion 41f.
  • the distal end of the inner needle 3 is positioned in the space 5 a 1 of the outer needle hub locking portion 5 a formed in the protector 5, and the distal end portion 5 a 2 of the outer needle hub locking portion 5 a is connected to the outer needle hub 22. Abut.
  • the protector 5 is stably attached (fitted) to the inner needle hub 41.
  • the protector When the protector is thus mounted, the forward movement of the outer needle hub 22 (catheter 2) is blocked by the outer needle hub locking portion 5a, and the outer needle hub 22 (catheter 2). Is prevented by the inner needle hub 41 (fitting portion 41 b) fixed to the protector 5. As a result, the catheter 2 is fixed and movement of the catheter 2 is prevented. Even when the outer needle hub 22 is provided with wings 22A, the protector 5 can be securely mounted without increasing the size, and the outer needle is secured by the space portion 5a1 of the outer needle hub locking portion 5a. 21 and the inner needle 3 protruding from the tip of the outer needle 21 can be accommodated and protected.
  • the user can easily remove the protector 5 with one hand by placing a finger on the rib-shaped frame 5d.
  • the contact portions 5f and 5g are in contact with the fitting portion 41b and not the arm opening / closing portion 62 of the outer cylinder 6. Therefore, even if the protector 5 moves, the arm opening / closing portion 62 of the outer cylinder 6 moves in the Y direction. It does not move and stays in that position.
  • the outer needle hub 22 (catheter 2) does not move relative to the inner needle 3, so the outer needle 21 moves forward from the tip of the inner needle 3, and the inner needle It is possible to prevent adverse effects such as covering the tip of 3.
  • the puncture device 1 has the outer needle 21, the outer needle hub 22 having the protruding portion on the side surface while holding the proximal end portion of the outer needle, and the distal end of the outer needle.
  • the puncture device 1 includes an inner needle 3 into which a portion is inserted, a cylindrical inner needle hub 41 that holds a proximal end portion of the inner needle, and a protector 5 that covers the outer needle.
  • An outer needle hub locking portion 5a for housing the outer needle, and an upper surface and a side surface of the protector that extend in the axial direction from the outer needle hub locking portion 5a, and a lower surface and the outer needle hub locking A main body part 5b having openings 5c1 and 5c2 at the opposite end of the part, a rib-like frame 5d formed on the outer peripheral surface of the main body part opposite to the outer needle hub locking part, A hooked protrusion 5e formed on the inner peripheral surface of the end opposite to the needle hub locking portion, and the inner needle
  • the rib 41 has a rib-like protrusion 41e that locks the locked protrusion 5e formed on the outer peripheral surface on one end side, and the protruding portion 22A of the outer needle hub 22 is formed in the opening on the lower surface of the protector.
  • the locked protrusion 5e of the main body portion 5b is inserted into the inner needle hub. 41, and the outer needle 21 is received in the space 5a1 of the outer needle hub locking portion 5a.
  • a projecting portion (such as the wing 106 shown in FIG. 24) can be disposed in the opening 5c2.
  • the protector 5 can be fitted to the inner needle hub without interfering with the protruding portion 22A. That is, even when the outer needle hub 22 is provided with a protruding portion 22A such as a wing, the protector 5 can be securely mounted without increasing the size, and the outer needle hub locking portion 5a can The inner needle protruding from the tip of the outer needle can be accommodated and protected to prevent positional displacement thereof, and a safety aspect can be ensured.
  • the rib-like frame 5d is formed on the main body part 5b, the strength of the main body part 5b having the openings 5c1 and 5c2 on the lower surface and the opposite end side of the outer needle hub locking part can be increased. The deformation of the protector 5 can be suppressed.
  • the height of the rib-like frame 5d from the outer peripheral surface of the main body is formed such that the user's finger can be taken.
  • the rib-shaped frame is formed in this way, the user can easily remove the protector 5 from the inner needle hub 41 with one hand by placing a finger on the rib-shaped frame 5d.
  • the protector 5 protrudes from the inner peripheral surface of the main body 5b and extends in parallel with the axis along the axis of the main body 5b from the opening at the opposite end of the outer needle hub locking portion 5a.
  • the contact portion 5f, 5g 5f and 5g are preferably in pressure contact with the outer peripheral surface of the inner needle hub 41 (fitting portion 41b).
  • the outer peripheral surface of the inner needle hub 41 (fitting portion 41b) is not in pressure contact with the entire inner peripheral surface of the main body portion 5b of the protector 5, but is in pressure contact with the contact portions 5f and 5g. Sliding resistance is obtained, and accidents when the protector 5 is attached or removed can be suppressed.
  • the protector 5 protrudes from the inner peripheral surface of the main body 5b and extends in parallel with the axis along the axis of the main body 5b from the opening 5c1 on the opposite end side of the outer needle hub locking portion.
  • the rib-like protrusions 41e are formed at predetermined intervals, and the inner needle hub 41 extends from the opening 5c1 on the opposite end side of the protector 5 to the outer needle hub locking portion.
  • the guided portions 5h and 5i are inserted between the rib-like projections 41e and guided to the rib-like projections 41e.
  • a presser protrusion 41f that is in contact with the guided portion is formed on the outer peripheral surface of the inner needle hub closer to the inner needle proximal end than the rib-shaped protrusion 41e.
  • the guided portions 5h and 5i are in contact with the presser protrusion 41f, it is possible to prevent the protector 5 from rattling with respect to the inner needle hub 41.
  • the protector 5 is attached to the inner needle hub 41, the inclination (deformation) of the protector 5 toward the lower surface opening can be suppressed.
  • a seventh embodiment will be described with reference to FIGS. Note that members similar to those in the first to sixth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the protector shown in the sixth embodiment is improved.
  • the present embodiment has been made to solve the above-described problems. Even when a branch pipe or a wing is provided on the outer needle hub that holds the outer needle, a protector for covering the outer needle hub is large-sized. There is a feature in the puncture device that can be securely attached without being changed, protect the outer needle and the inner needle protruding from the outer needle, prevent positional displacement thereof, and ensure a safety surface.
  • the puncture device 1 includes a catheter 2, an inner needle 3 into which a distal end portion is inserted into the catheter 2, and a cylinder that holds one end portion (base end portion) of the inner needle 3. And a protector 5 that covers the distal ends of the catheter 2 and the inner needle 3. Moreover, in the puncture device 1, all parts except the inner needle 3 are made of resin.
  • the catheter 2 includes an outer needle 21 made of a flexible hollow tube and an outer needle hub 22 that holds a proximal end portion of the outer needle 21.
  • the outer needle hub 22 is provided with a branch pipe 22B (projection site) on the side surface thereof.
  • the outer needle hub 22 is integrally formed with a pair of wings 22A (projection portions) extending on the left and right sides thereof.
  • the branch tube 22B is used, for example, to supply a drug solution to a patient, and the pair of wings 22A is used to fix the catheter to the skin with an adhesive tape or the like and prevent the catheter 2 from being displaced.
  • the injection device 4 is attached to a cylindrical inner needle hub 41 and a base end (left end of the paper surface) of the inner needle hub 41 by press fitting, and the base of the inner needle 3 And a tail plug 42 having a substantially cylindrical needle holding portion 42a for holding the end portion.
  • a cylindrical fitting portion 41b having a diameter larger than the cylinder diameter of the main body is formed on the outer peripheral surface on the distal end side of the inner needle hub 41.
  • a rib-like protrusion 41g is formed in an annular shape along the circumferential direction on the outer peripheral surface of the fitting portion 41b, and the rib-like protrusion 41g is provided for fitting the inner needle hub 41 with the protector 5 more reliably. It has been.
  • a convex portion 41h which is a rib-like protrusion extending in the axial direction, is formed on the inner peripheral surface of the fitting portion 41b.
  • the convex portion 41h is provided to more reliably fit the inner needle hub 41 and the protector 5 and prevent the protector 5 from being displaced in the circumferential direction.
  • the protector 5 includes a cylindrical outer needle locking portion 51 (see FIGS. 41 and 42) that can accommodate the outer needle 21 and the inner needle 3 protruding from the tip of the outer needle 21. And a pair of support legs 52 extending in the axial direction while expanding from the outer peripheral surface of the outer needle locking portion 51.
  • the outer needle locking portion 51 comes into contact with the step portion 22 ⁇ / b> C formed on the outer needle hub 22 to fix the catheter 2.
  • the pair of support legs 52 are formed by, for example, notching the left and right sides of a cap shape made of a hollow cone along the axial direction.
  • an opening 53 is formed between the pair of support legs 52 on the side surface of the protector 5.
  • the support leg 52 is provided with a groove 52a that is curved along the concentric circle of the cylindrical part 51 (along the circumferential direction of the fitting part 41a) at the tip thereof, and the groove 52a has a predetermined length and width. have. Further, a rib-like protrusion 52b extending in the circumferential direction is formed on the inner side surface of the outer wall forming the groove 52a, and this rib-like protrusion 52b forms a rib-like protrusion 41g of the fitting part 41b of the inner needle hub 41. It gets locked by getting over it and overlapping in the axial direction.
  • the convex part 41h extended in the axial direction is formed in the inner peripheral surface of the fitting part 41b as described above, when the fitting part 41b is fitted into the groove part 52a, the convex part 41h. Is in contact with the inner surface of the groove 52a, and the axial displacement of the protector 5 is prevented.
  • the protector 5 When the protector 5 is mounted, as shown in FIG. 41, a part of the fitting portion 41b of the inner needle hub 41 is fitted into the groove portion 52a provided at the tip of the pair of support leg portions 52, and the inside of the groove portion 52a.
  • the rib-shaped protrusion 52b is engaged with the rib-shaped protrusion 41g of the fitting portion 41b.
  • the protector 5 is stably attached (fitted) to the inner needle hub 41, and the outer needle 21 and the outer needle 21 and the inner needle 21 are supported by the support leg 52 of the protector 5.
  • the inner needle 3 protruding from the tip of the outer needle 21 is accommodated.
  • the branch pipe 22B of the outer needle hub 22 is disposed in the upper opening 53 provided on the side surface of the protector 5, and the pair of blades 22A is provided in the lower opening 53. Since it is in the disposed state, the support leg 52 is fitted into the fitting portion 41b of the inner needle hub 41 without interfering with the branch pipe 22B and the pair of blades 22A. In other words, even when the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely mounted without increasing the size, and the outer needle 21 and the outer needle 21 and the The inner needle 3 protruding from the tip of the outer needle 21 can be accommodated and protected.
  • the outer needle hub 22 branches to the opening 53.
  • the tube 22B and the pair of blades 22A can be arranged, and the support leg 52 can be fitted to the inner needle hub 41 without interfering with the branch tube 22B and the blades 22A. That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely mounted without increasing the size, and the outer needle 21 and the outer needle can be attached by the outer needle locking portion 51.
  • the inner needle 3 protruding from the tip of 21 can be accommodated and protected to prevent positional displacement thereof and to ensure safety.
  • the rib-like protrusion 52b protruding inward is provided on the inner surface of the groove 52a of the support leg 52, and the rib-like protrusion 41g protruding outward is formed on the outer surface of the fitting part 41b.
  • the present invention is not limited thereto.
  • a rib-like protrusion that protrudes outward along the circumferential direction is provided on the inner surface of the groove 52a of the support leg 52, and a rib that protrudes inward along the circumferential direction is provided on the inner surface of the fitting part 41b.
  • Protrusions may be provided so that they engage each other.
  • At least two rib-shaped protrusions are interposed between the side surface of the groove portion 52a of the support leg portion 52 and the inner surface or the outer surface of the fitting portion 41b, and they are engaged with each other.
  • the protector 5 can be firmly fitted to the inner needle hub 41.
  • the convex part 41h (rib-shaped protrusion) extended in the axial direction is provided in the inner surface of the fitting part 41b, and this convex part 41h is the fitting part and the inner surface of the groove part 52a. It was assumed to be interposed between the inner surface of 41a.
  • the configuration is not limited thereto, and a convex portion extending in the axial direction is provided, for example, on the inner surface of the groove portion 52a of the support leg portion 52, and this is the inner surface of the groove portion 52a. You may make it interpose between the inner surface or the outer surface of the fitting part 41b.
  • the convex part extended in an axial direction may be provided in the outer surface of the fitting part 41b, and you may make it interpose between the inner surface of the groove part 52a, and the outer surface of the fitting part 41b.
  • the convex portion 41 h is interposed between the side surface of the groove portion 52 a of the support leg portion 52 and the inner side surface or the outer surface of the fitting portion 41 b, and the fitting portion 41 b is fitted into the groove portion 52. Can do.
  • the puncture device 1 includes the outer needle 21, the outer needle hub 22 that holds the proximal end portion of the outer needle 21 and has a protruding portion on the side surface, and the outer A puncture device comprising an inner needle 3 into which a distal end portion is inserted into a needle 21, a cylindrical inner needle hub 41 that holds a proximal end portion of the inner needle, and a protector 5 that covers the outer needle,
  • the protector 5 includes an outer needle locking portion 51 that accommodates the outer needle 21, an axial direction extending from the outer needle locking portion 51 to form a side surface of the protector, and an opening 53 on the side surface.
  • a fitting portion 41b formed along the circumferential direction of the inner needle hub is provided on one end side of the inner needle hub 41, and one end of the supporting leg portion 52 is formed.
  • Protruding portions 22A and 22B of the outer needle hub 22 are arranged in the opening on the side surface of the protector 5, and a part of the fitting portion 41b is fitted in the groove portion 52a of the support leg portion 52, The needle 21 is accommodated in the space portion of the outer needle locking portion 51.
  • the projecting portions 22A and 22B (branch pipes, wings, etc.) can be disposed in the opening 53, and the support legs The portion 52 can be fitted to the inner needle hub 41 without interfering with the protruding portions 22A and 22B. That is, even when the outer needle hub 22 is provided with projecting portions 22A, 22B such as branch pipes and wings, the protector 5 can be securely attached without increasing the size, and the outer needle locking portion 51 can accommodate and protect the outer needle 21 and the inner needle 3 protruding from the tip of the outer needle, prevent positional displacement thereof, and ensure safety.
  • a plurality of the support leg portions 52 extend from the outer needle locking portion 51 along the axial direction, and the openings 53 are formed between the plurality of support leg portions 52. .
  • a plurality of openings 53 can be formed in the circumferential direction on the side surface of the protector 5, and a plurality of protruding portions can be arranged in the openings 53. .
  • rib-like protrusions 52b and 41g extending along the circumferential direction are provided on the side surface of the groove portion 52a of the support leg portion 52 and the inner side surface or the outer surface of the fitting portion 41b, respectively. It is desirable that the rib-like projections 52b and 41g are interposed between the side surface of the groove portion 52a and the inner side surface or the outer surface of the fitting portion 41b, and engage with each other. By thus providing the rib-like protrusions 52b and 41g that engage with each other, the protector 5 can be more reliably prevented from coming off from the inner needle hub 41.
  • a rib-like protrusion extending along the circumferential direction is provided on either the side surface of the groove portion 52a of the support leg portion 52 or the inner side surface or the outer side surface of the fitting portion 41b.
  • the rib-like protrusion is interposed between the side surface of the groove portion 52a and the inner surface or the outer surface of the fitting portion 41b so that the fitting portion 41b is fitted into the groove portion 52a of the support leg portion 52.
  • the inner needle hub of the protector 5 can also be provided by providing a rib-like protrusion extending in the circumferential direction on either the side surface of the groove portion 52a of the support leg portion 52 or the inner side surface or the outer side surface of the fitting portion 41b.
  • the retaining effect for 41 can be obtained. Further, a rib-like protrusion 41h extending in the axial direction is provided on either the side surface of the groove portion 52a of the support leg portion 52 or the inner side surface or the outer surface of the fitting portion 41b, and the groove portion 52a of the support leg portion 52 is provided. It is desirable that the rib-like protrusion 41 h is interposed between the side surface of the fitting portion 41 b and the inner side surface or the outer side surface of the fitting portion 41 b, and the fitting portion 41 b is fitted into the groove portion 52 a of the support leg portion 52. By providing the rib-like protrusion 41h extending in the axial direction as described above, the axial displacement of the protector 5 can be prevented.
  • FIG. 44 to 50 The eighth embodiment will be described with reference to FIGS. 44 to 50.
  • FIG. 44 to 50 The same members as those in the first to seventh embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the protector shown in the seventh embodiment is improved.
  • a cylindrical fitting portion 41b having a diameter larger than the cylinder diameter of the main body 41a is integrally formed (or in the case of a separate body from the inner needle hub 41). Is firmly fitted to the main body 41a).
  • a pair of locking holes 41b1 penetrating in the axial direction is provided on the outer peripheral surface of the fitting portion 41b so as to face each other.
  • the pair of locking holes 41b1 have a diameter on the outer peripheral surface of the fitting portion 41b. It protrudes outward and has a predetermined length along the circumferential direction of the fitting portion 41b.
  • the pair of locking holes 41 b 1 are provided for fitting the inner needle hub 41 with the protector 5.
  • the protector 5 includes a cylindrical outer needle locking portion 51 (see FIGS. 47 and 48) that can accommodate the outer needle 21 and the inner needle 3 protruding from the tip of the outer needle 21. And a pair of support legs 52 extending in the axial direction while expanding from the outer peripheral surface of the outer needle locking portion 51.
  • the pair of support legs 52 are formed by, for example, notching the left and right sides of a cap shape made of a hollow cone along the axial direction.
  • an opening 53 is formed between the pair of support legs 52 on the side surface of the protector 5.
  • the support leg 52 is provided with a locking claw 52a curved at the tip of the support leg 52 along the concentric circle of the outer needle locking portion 5151 (along the circumferential direction of the fitting portion 41b).
  • 52a has a predetermined length in the circumferential direction.
  • the locking claw 52a has a size that can be inserted into a locking hole 41b1 provided in the inner needle hub 41. When the locking claw 52a is completely inserted into the locking hole 41b1, the locking claw 52a is inserted into the locking hole 41b1. It is designed to be locked.
  • the radial width of the locking claw 52a and the locking hole 41b1 is such that the locking claw 52a is artificially pushed radially inward after the locking claw 52a is locked to the locking hole 41b1.
  • the protector 5 when the protector 5 is mounted, the engaging claws 52a formed on the pair of support leg portions 52 of the protector 5 are provided on the fitting portions 41b of the inner needle hub 41, respectively. Insert and lock into the stop hole 41b1.
  • the spring 54 is compressed between the outer needle locking portion 51 and the outer needle hub 22, and an urging force is generated in a direction in which the protector 5 and the inner needle hub 41 are separated from each other.
  • the protector 5 is firmly and stably attached (fitted) to the inner needle hub 41, and the outer needle 21 is attached to the outer needle locking portion 51 supported by the support leg portion 52 of the protector 5.
  • the inner needle 3 protruding from the tip of the outer needle 21 is accommodated.
  • the support leg portion is provided. 52 is fitted into the fitting portion 41a of the inner needle hub 41 without interfering with the branch pipe 22A and the pair of blades 22B. That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely attached, and the outer needle 21 is projected from the outer needle 21 and the tip of the outer needle 21 by the outer needle locking portion 5151.
  • the inner needle 3 can be accommodated and protected.
  • the protector 5 when the protector 5 is removed, the engagement claw 52a at the tip of the support leg 52 is pushed inward in the radial direction to release the engagement with the engagement hole 41b1 of the inner needle hub 41.
  • the locking claw 52a is easily removed from the locking hole 41b1 by the biasing force of the spring 54.
  • the protector 5 is isolate
  • the branch pipe 22 ⁇ / b> B of the outer needle hub 22 is provided in the opening 53.
  • the pair of blades 22A, and the support leg 52 can be fitted to the inner needle hub 41 without interfering with the branch pipe 22B and the blade 22A. That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely attached without increasing the size, and the outer needle 21 and the outer needle can be attached by the outer needle locking portion 51.
  • the inner needle 3 protruding from the tip of 21 can be accommodated and protected to prevent positional displacement thereof and to ensure safety.
  • the puncture device 1 includes the outer needle 21, the outer needle hub 22 that holds the proximal end portion of the outer needle and has a protruding portion on the side surface, and the outer needle. 21.
  • a puncture device including an inner needle 3 into which a distal end portion is inserted into 21, a cylindrical inner needle hub 41 that holds a proximal end portion of the inner needle, and a protector 5 that covers the outer needle.
  • 5 includes an outer needle locking portion 51 that accommodates the outer needle 21, and extends from the outer needle locking portion 51 in the axial direction to form a side surface of the protector, and an opening is formed on the side surface.
  • a locking claw 52a is provided on one end of the support leg 52, and a locking claw 52a of the support leg 52 is inserted on one end of the inner needle hub 41.
  • a possible locking hole 41 b 1 is provided, and the outer needle hub 22 is formed in the opening 53 on the side surface of the protector 5.
  • the projecting portions 22A and 22B are arranged, the locking claw 52a of the support leg 52 is inserted and locked in the locking hole 41b1 of the inner needle hub 41, and the outer needle 21 is locked to the outer needle locking portion 51.
  • the protector 5 since the opening 53 is provided on the side surface of the protector 5, the projecting portions 22A and 22B (branch pipes, wings, etc.) can be disposed in the opening 53, and the support legs The portion 52 can be fitted to the inner needle hub 41 without interfering with the protruding portions 22A and 22B. That is, even when the outer needle hub 22 is provided with a projecting portion such as a branch pipe or a wing, the protector 5 can be securely mounted without increasing the size, and the outer needle 21 is secured by the outer needle locking portion 51.
  • the inner needle 3 protruding from the tip of the outer needle can be accommodated and protected to prevent positional displacement thereof and ensure safety.
  • a plurality of the support leg portions 52 extend from the outer needle locking portion 51 along the axial direction, and are provided on one end side of the inner needle hub 41 on one end side of the plurality of support leg portions 52. It is desirable that a plurality of the locking holes 41b1 are provided corresponding to the locking claws 52a. In this way, the locking claw 52a provided on the plurality of support legs 52 is configured to be locked to one end side of the inner needle hub 41, thereby stably supporting the outer needle locking portion 51. Can do.
  • a plurality of the support leg portions 52 extend from the outer needle locking portion 51 along the axial direction, and the openings 53 are formed between the plurality of support leg portions 52.
  • a plurality of openings 53 can be formed in the circumferential direction on the side surface of the protector 5, and a plurality of protruding portions can be arranged in the openings 53. .
  • the protector 5 has an elastic member 54 that can be expanded and contracted in the axial direction.
  • the elastic member 54 is engaged with the engaging claw 52 a of the support leg 52 in the engaging hole 41 b 1 of the inner needle hub 41. It is preferable that the protector 5 and the inner needle hub 41 are urged in a direction in which the protector 5 and the inner needle hub 41 are separated from each other.
  • the elastic member 54 By providing the elastic member 54 in this manner, the fitting of the protector 5 to the inner needle hub 41 can be made more reliable. Further, separation of the protector 5 and the inner needle hub 41 (removal of the protector) can be easily performed by the biasing force of the elastic member 54, and displacement of the outer needle hub can be prevented.
  • the outer needle hub 22 branches to the opening 53.
  • the tube 22B and the pair of blades 22A can be arranged, and the support leg 52 can be fitted to the inner needle hub 41 without interfering with the branch tube 22B and the blades 22A. That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely attached without increasing the size, and the outer needle 21 and the outer needle can be attached by the outer needle locking portion 51.
  • the inner needle 3 protruding from the tip of 21 can be accommodated and protected to prevent positional displacement thereof and to ensure safety.

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Abstract

[Purpose] To provide a puncture tool that prevents a component of the puncture tool from being damaged by bending (buckling) or the like, and that ensures safety and can easily be handled by a user with less strength. [Solution] A puncture tool (1) including: an outer needle (21); an outer needle hub (22) that holds a proximal part of the outer needle; an inner needle (3), the distal part of which is inserted into the outer needle; an inner needle hub (41) that holds the proximal part of the inner needle; an outer tube (6) that is attached so as to be capable of freely advancing and retreating in the inner needle hub; grasping means (71A) for grasping the outer needle hub; and an inner tube (7) that is attached so as to be capable of freely advancing and retreating in the outer tube (6); wherein at least the outer tube (6) is formed from a flexible synthetic resin.

Description

穿刺具Puncture tool
　本発明は穿刺具に関し、特に外針（カテーテル）を血管に留置するための穿刺具に関する。 The present invention relates to a puncture device, and more particularly to a puncture device for placing an outer needle (catheter) in a blood vessel.
　従来から、例えば、特許文献１，２に記載されているような外針（カテーテル）を血管に留置するための穿刺具が知られている。
　このような穿刺具は、外針と、外針を保持する外針ハブと、外針に先端部が挿入される内針と、内針の基端部を内部に保持する筒状の内針ハブとを備えている。 Conventionally, for example, a puncture device for placing an outer needle (catheter) as described in Patent Documents 1 and 2 in a blood vessel is known.
Such a puncture device includes an outer needle, an outer needle hub that holds the outer needle, an inner needle that has a distal end inserted into the outer needle, and a cylindrical inner needle that holds the proximal end portion of the inner needle inside. With a hub.
　具体的には、特許文献１に記載された穿刺具を図５０に基づいて説明する。
　この穿刺具１００は、図５０（Ａ）に示すように、外針１０２ａと外針ハブ１０２ｂと、外針１０２ａに先端部が挿入される内針１０３と、内針１０３の基端部を内部に保持する筒状の内針ハブ１０１とを備えている。 Specifically, the puncture device described in Patent Document 1 will be described with reference to FIG.
As shown in FIG. 50A, the puncture device 100 includes an outer needle 102a, an outer needle hub 102b, an inner needle 103 into which a distal end is inserted into the outer needle 102a, and a proximal end portion of the inner needle 103 as an inner portion. And a cylindrical inner needle hub 101 that is held in the cylinder.
　そして、穿刺具１００の使用方法について説明すると、図５０（Ａ）に示すように、内針ハブ１０１内にスライドカバー１０４が収納され、外針１０２ａの先端から内針１０３の先端１０３ａが突出した状態で、患者の身体１１０に穿刺（刺針）される。 Then, a method of using the puncture device 100 will be described. As shown in FIG. 50A, the slide cover 104 is housed in the inner needle hub 101, and the distal end 103a of the inner needle 103 protrudes from the distal end of the outer needle 102a. In the state, the patient's body 110 is punctured (puncture needle).
　その後、外針１０２ａを体内に送った後（図５０（Ｂ）参照）、外針１０２ａを体内に刺し置いた状態で、内針ハブ１０１を手元に引っ張ることにより、スライドカバー１０４が伸長し、内針の先端１０３ａが体内から抜ける（図５０（Ｃ）参照）。
　そして、更に同方向に内針ハブ１０１を引っ張ることで、手に触れることなく、内針１０３の先端１０３ａが同スライドカバー１０４内に保持される。 Then, after sending the outer needle 102a into the body (see FIG. 50 (B)), the slide cover 104 is extended by pulling the inner needle hub 101 toward the hand with the outer needle 102a stabbed in the body, The tip 103a of the inner needle comes out of the body (see FIG. 50C).
Further, by pulling the inner needle hub 101 in the same direction, the tip 103a of the inner needle 103 is held in the slide cover 104 without touching the hand.
　次いで、斯かる状態で内針ハブ１０１を周方向に回動させ（図５０（Ｄ）参照）、スライドカバー１０４の全体が同方向に回転して先端側のホルダー１０５が解除される（取り外される）。
　その結果、外針１０２ａのみを体内に留置し、内針１０３を収容した内針ハブ１０１を取り外すことができ、内針１０３をそのまま廃棄することができる（図５０（Ｅ）参照）。 Next, in this state, the inner needle hub 101 is rotated in the circumferential direction (see FIG. 50D), the entire slide cover 104 rotates in the same direction, and the distal end side holder 105 is released (removed). ).
As a result, only the outer needle 102a can be left in the body, the inner needle hub 101 containing the inner needle 103 can be removed, and the inner needle 103 can be discarded as it is (see FIG. 50E).
　また、特許文献２に記載された穿刺具にあっては、図示しないが、外針を体内に刺し置いた状態で、内針ハブに設けられた押圧片を押すことによって、内針に手を触れることなく、内針を内針ハブの内部に収容することができるように構成されている。 In the puncture device described in Patent Document 2, although not shown, a hand is placed on the inner needle by pressing a pressing piece provided on the inner needle hub with the outer needle stabbed in the body. The inner needle can be accommodated inside the inner needle hub without being touched.
特開２００２－０００７２７号公報JP 2002-000727 A 特開２００７－１４３８７６号公報JP 2007-143876 A
ところで、前記特許文献２に記載された穿刺具にあっては、押圧片を押し忘れると、内針を内針ハブの内部に収容しない状態で廃棄することになり、作業者にとって非常に危険であり、安全性を確保することができない虞があるという技術的課題があった。
これに対して、前記特許文献１に記載された穿刺具にあっては、外針を体内に刺し置いた状態で、内針を内針ハブの内部に収容することができ、安全に作業を行うことができる。
しかしながら、特許文献１に記載された穿刺具にあっては、内針を外針から引抜く動作の際、内針ハブの引抜き動作方向が、斜め方向（内針の延長線上ではない方向）になされた場合、内針ハブ１０１、スライドカバー１０４等に曲げ力が加わり、内針ハブ１０１、スライドカバー１０４等が座屈（折曲がり）等を起こし、破損する虞がある。そして、内針ハブ１０１、スライドカバー１０４等が破損等した場合には、スライドカバー１０４等から内針３が露出する虞れがあり、作業者にとって非常に危険であり、安全性を確保することができない虞があるという技術的課題があった。
更に、スライドカバー１０４が内針ハブ１０１内を摺動するため、摺動抵抗が大きく、力のない使用者には取り扱いが容易でないという技術的課題があった。 By the way, in the puncture device described in Patent Document 2, if the pressing piece is forgotten to be pressed, the inner needle is discarded without being accommodated inside the inner needle hub, which is very dangerous for the operator. There is a technical problem that there is a possibility that safety cannot be ensured.
On the other hand, in the puncture device described in Patent Document 1, the inner needle can be accommodated inside the inner needle hub with the outer needle stabbed in the body, and the work can be performed safely. It can be carried out.
However, in the puncture device described in Patent Document 1, when the inner needle is pulled out from the outer needle, the pulling operation direction of the inner needle hub is in an oblique direction (a direction not on the extension line of the inner needle). If it is made, bending force is applied to the inner needle hub 101, the slide cover 104, etc., and the inner needle hub 101, the slide cover 104, etc. may be buckled (bent) and damaged. If the inner needle hub 101, the slide cover 104, etc. are damaged, the inner needle 3 may be exposed from the slide cover 104, etc., which is very dangerous for the operator and ensures safety. There was a technical problem that there was a risk of failure.
Further, since the slide cover 104 slides in the inner needle hub 101, there is a technical problem that the sliding resistance is large and handling is not easy for a user having no force.
　本発明は、上記技術的課題を解決するためになされたものであり、穿刺具を構成する部品が座屈（折曲がり）等によって破損するのを防止し、安全性を確保するすると共に、力のない使用者も容易に取り扱うことができる穿刺具を提供することを目的とする。 The present invention has been made to solve the above technical problem, and prevents parts constituting the puncture tool from being damaged by buckling (bending) or the like, ensuring safety, An object of the present invention is to provide a puncture device that can be easily handled even by a user who does not have the problem.
　上記技術的課題を解決するためになされた本発明にかかる穿刺具は、外針と、前記外針の基端部を保持する外針ハブと、前記外針に先端部が挿入される内針と、前記内針の基端部を保持する内針ハブと、内針ハブの内部に進退自在に取り付けられる外筒と、前記外針ハブを把持する把持手段を有すると共に、前記外筒の内部に進退自在に取付けられた内筒とを備え、少なくとも前記外筒が軟質の合成樹脂材料によって形成されていることを特徴としている。 The puncture device according to the present invention made to solve the above technical problem includes an outer needle, an outer needle hub that holds a proximal end portion of the outer needle, and an inner needle in which a distal end portion is inserted into the outer needle. An inner needle hub that holds the proximal end portion of the inner needle, an outer cylinder that is movably attached to the inner needle hub, and a gripping means that grips the outer needle hub. And at least the outer cylinder is made of a soft synthetic resin material.
このように、少なくとも外筒が軟質の合成樹脂材料によって形成されているため、前記曲げ力によって外筒は屈曲するが、割れ等の破損を防止することができる。また外筒の破損等が防止される結果、外筒が内針ハブから外れ、内針が露出するという虞れもなく、安全性を確保することができる。 Thus, since at least the outer cylinder is formed of a soft synthetic resin material, the outer cylinder is bent by the bending force, but breakage such as cracking can be prevented. Further, as a result of preventing the outer cylinder from being damaged, there is no fear that the outer cylinder is detached from the inner needle hub and the inner needle is exposed, and safety can be ensured.
　ここで、前記内筒が、軟質の合成樹脂材料によって形成されていることが望ましい。このように、内筒が軟質の合成樹脂材料によって形成されている場合には、前記曲げ力による内筒の割れ等の破損を防止することができる。
　また、前記内針ハブが、軟質の合成樹脂材料によって形成されていることが望ましい。このように、内針ハブが軟質の合成樹脂材料によって形成されている場合には、前記曲げ力による内針ハブの割れ等の破損を防止することができる。
　尚、前記軟質の合成樹脂材料は、伸び率が１００％以上である合成樹脂であることが望ましい。また、前記軟質の合成樹脂材料は、ポリプロピレンであることが望ましい。 Here, it is desirable that the inner cylinder is formed of a soft synthetic resin material. Thus, when the inner cylinder is formed of a soft synthetic resin material, it is possible to prevent damage such as cracking of the inner cylinder due to the bending force.
The inner needle hub is preferably formed of a soft synthetic resin material. Thus, when the inner needle hub is formed of a soft synthetic resin material, it is possible to prevent damage such as cracking of the inner needle hub due to the bending force.
The soft synthetic resin material is preferably a synthetic resin having an elongation percentage of 100% or more. The soft synthetic resin material is preferably polypropylene.
　このように、内筒、外筒、内針ハブについても、ポリプロピレンで形成した場合には、摺動抵抗を少なくすることができるため、内針ハブの引抜き動作を小さな力で行うことができ、力のない使用者でも容易に取り扱うことができる。 As described above, when the inner cylinder, outer cylinder, and inner needle hub are made of polypropylene, the sliding resistance can be reduced, so that the inner needle hub can be pulled out with a small force. Even a weak user can easily handle it.
　本発明によれば、穿刺具を構成する部品が座屈（折曲がり）等によって破損するのを防止し、安全性を確保するすると共に、力のない使用者も容易に取り扱うことができる穿刺具を得ることができる。 ADVANTAGE OF THE INVENTION According to this invention, while preventing the components which comprise a puncture tool from being damaged by buckling (bending) etc., ensuring safety, the puncture tool which a weak user can also handle easily. Can be obtained.
図１は、本発明の第１の実施形態にかかる穿刺具の外観を示す斜視図である。FIG. 1 is a perspective view showing an appearance of a puncture device according to the first embodiment of the present invention. 図２は、図１における穿刺具のプロテクタを取り外した状態を示す斜視図である。FIG. 2 is a perspective view showing a state where the protector of the puncture device in FIG. 1 is removed. 図３は、図１にかかる穿刺具のプロテクタを除く、分解斜視図である。FIG. 3 is an exploded perspective view excluding the protector of the puncture device according to FIG. 1. 図４は、図１に示した穿刺具を示す縦断面図である。4 is a longitudinal sectional view showing the puncture device shown in FIG. 図５は、図１の穿刺具を示す縦断面図であって、図４の縦断面図と９０度方向の異なる縦断面図である。FIG. 5 is a longitudinal sectional view showing the puncture device of FIG. 1, and is a longitudinal sectional view different from the longitudinal sectional view of FIG. 4 in the direction of 90 degrees. 図６は、外筒を示す図であって、（ａ）は斜視図、（ｂ）は縦断面図、（ｃ）は（ｂ）の縦断面図と９０度方向の異なる縦断面図である。6A and 6B are diagrams showing an outer cylinder, in which FIG. 6A is a perspective view, FIG. 6B is a longitudinal sectional view, and FIG. 6C is a longitudinal sectional view different from the longitudinal sectional view of FIG. . 図７は、内筒を示す斜視図である。FIG. 7 is a perspective view showing the inner cylinder. 図８は、内筒を展開した状態を示す図であって、（ａ）は平面図、（ｂ）は（ａ）のＡ－Ａ断面図である。FIGS. 8A and 8B are views showing a state in which the inner cylinder is expanded, in which FIG. 8A is a plan view and FIG. 8B is a cross-sectional view taken along line AA in FIG. 図９は、図１に示された穿刺具を使用する手順を説明するための穿刺状態を示す図であって、（ａ）は縦断面図、（ｂ）は（ａ）の縦断面図と９０度方向の異なる縦断面図である。FIG. 9 is a diagram showing a puncture state for explaining a procedure for using the puncture device shown in FIG. 1, wherein (a) is a longitudinal sectional view, and (b) is a longitudinal sectional view of (a). It is a longitudinal cross-sectional view from which a 90 degree | times direction differs. 図１０は、図１に示された穿刺具を使用する手順を説明するための内針ハブを伸長させた状態を示す図であって、（ａ）は縦断面図、（ｂ）は（ａ）の縦断面図と９０度方向の異なる縦断面図である。FIGS. 10A and 10B are views showing a state in which the inner needle hub for explaining the procedure for using the puncture device shown in FIG. 1 is extended, wherein FIG. 10A is a longitudinal sectional view, and FIG. 2) and a vertical cross-sectional view different from each other by 90 degrees. 図１１は、図１に示された穿刺具を使用する手順を説明するための内針ハブの伸長が終了した状態を示す図であって、（ａ）は縦断面図、（ｂ）は（ａ）の縦断面図と９０度方向の異なる縦断面図である。11 is a view showing a state in which the extension of the inner needle hub for explaining the procedure of using the puncture device shown in FIG. 1 is completed, (a) is a longitudinal sectional view, and (b) is ( It is a longitudinal cross-sectional view in which the longitudinal cross-sectional view of a) differs in a 90 degree direction. 図１２は、図１に示された穿刺具を使用する手順を説明するための外針を留置した状態を示す図であって、（ａ）は縦断面図、（ｂ）は（ａ）の縦断面図と９０度方向の異なる縦断面図である。12 is a view showing a state in which an outer needle for indwelling the procedure for using the puncture device shown in FIG. 1 is placed, in which (a) is a longitudinal sectional view and (b) is a view of (a). It is a longitudinal cross-sectional view in which a 90 degree direction differs from a longitudinal cross-sectional view. 図１３は、第1の実施形態を示す縦断面図であって、外針が移動することを説明する図である。FIG. 13 is a longitudinal sectional view showing the first embodiment, and is a diagram for explaining the movement of the outer needle. 図１４は、第２の実施形態を示す縦断面図である。FIG. 14 is a longitudinal sectional view showing the second embodiment. 図１５は、第２の実施形態にかかるプロテクタの縦断面図である。FIG. 15 is a longitudinal sectional view of the protector according to the second embodiment. 図１６は、図１５に示したプロテクタの図であって、（ａ）は斜視図、（ｂ）は内針ハブの挿入側から見た図である。16A and 16B are diagrams of the protector shown in FIG. 15, where FIG. 16A is a perspective view, and FIG. 16B is a view as seen from the insertion side of the inner needle hub. 図１７は、第３の実施形態を示す縦断面図である。FIG. 17 is a longitudinal sectional view showing the third embodiment. 図１８は、図１７に示す状態から外筒が引き出された状態を示す縦断面図である。18 is a longitudinal sectional view showing a state in which the outer cylinder has been pulled out from the state shown in FIG. 図１９は、図１８に示す状態から中継筒が引き出された状態を示す縦断面図である。FIG. 19 is a longitudinal sectional view showing a state in which the relay cylinder is pulled out from the state shown in FIG. 図２０は、第４の実施形態にかかる外筒が引き出され、屈曲した状態を示す平面図である。FIG. 20 is a plan view showing a state in which the outer cylinder according to the fourth embodiment is pulled out and bent. 図２１は、図２０に示した第４の実施形態にかかる縦断面図である。FIG. 21 is a longitudinal sectional view according to the fourth embodiment shown in FIG. 図２２は、第５の実施形態の斜視図である。FIG. 22 is a perspective view of the fifth embodiment. 図２３は、図２０に示した第５の実施形態の縦断面図である。FIG. 23 is a longitudinal sectional view of the fifth embodiment shown in FIG. 図２４は、従来の穿刺具の変形例を示す斜視図である。FIG. 24 is a perspective view showing a modification of the conventional puncture device. 図２５は、本発明の第６の実施形態にかかる穿刺具の外観を示す斜視図である。FIG. 25 is a perspective view showing an appearance of a puncture device according to the sixth embodiment of the present invention. 図２６は、図２５の穿刺具の側面図である。FIG. 26 is a side view of the puncture device of FIG. 図２７は、図２５における穿刺具のプロテクタを取り外した状態を示す斜視図である。FIG. 27 is a perspective view showing a state where the protector of the puncture device in FIG. 25 is removed. 図２８は、図２５の穿刺具を分解した状態を示す斜視図である。FIG. 28 is a perspective view showing a state where the puncture device of FIG. 25 is disassembled. 図２９は、図２５に示した穿刺具を示す図であって、（ａ）は縦断面図、（ｂ）（ａ）と９０°角度の異なる縦断面図である。FIG. 29 is a view showing the puncture device shown in FIG. 25, wherein (a) is a longitudinal sectional view, and (b) and (a) are longitudinal sectional views different from each other by an angle of 90 °. 図３０は、図２５に示した穿刺具の内針ハブを示す図であって、（ａ）は側面図、（ｂ）は縦断面図である。30 is a view showing an inner needle hub of the puncture device shown in FIG. 25, wherein (a) is a side view and (b) is a longitudinal sectional view. 図３１は、図２６に示した内針ハブの斜視図である。FIG. 31 is a perspective view of the inner needle hub shown in FIG. 図３２は、プロテクタの斜視図である。FIG. 32 is a perspective view of the protector. 図３３は、プロテクタの下側（下面側）から見た斜視図である。FIG. 33 is a perspective view seen from the lower side (lower surface side) of the protector. 図３４は、プロテクタの縦断面図である。FIG. 34 is a longitudinal sectional view of the protector. 図３５は、プロテクタ装着する手順を説明するための穿刺具の図であって、（ａ）は側面図、（ｂ）は縦断面図である。FIG. 35 is a view of a puncture device for explaining a procedure for attaching the protector, in which (a) is a side view and (b) is a longitudinal sectional view. 従来の穿刺具の変形例を示す斜視図である。It is a perspective view which shows the modification of the conventional puncture device. 図３７は、本発明の第７の実施形態にかかる穿刺具の外観を示す斜視図である。FIG. 37 is a perspective view showing an appearance of a puncture device according to the seventh embodiment of the present invention. 図３８は、図３７の穿刺具の側面図である。FIG. 38 is a side view of the puncture device of FIG. 図３９は、図３７における穿刺具のプロテクタを取り外した状態を示す斜視図である。FIG. 39 is a perspective view showing a state where the protector of the puncture device in FIG. 37 is removed. 図４０は、図３７の穿刺具を分解した状態を示す斜視図である。FIG. 40 is a perspective view showing a state where the puncture device of FIG. 37 is disassembled. 図４１は、図３７に示した穿刺具を示す縦断面図である。FIG. 41 is a longitudinal sectional view showing the puncture device shown in FIG. 図４２は、図３７に示した穿刺具を示す縦断面図であって、図４１と９０°異なる縦断面図である。42 is a longitudinal sectional view showing the puncture device shown in FIG. 37, and is a longitudinal sectional view different from FIG. 41 by 90 °. 図４３は、プロテクタの斜視図である。FIG. 43 is a perspective view of the protector. 図４４は、本発明の第８の実施形態にかかる穿刺具の外観を示す斜視図である。FIG. 44 is a perspective view showing an appearance of a puncture device according to the eighth embodiment of the present invention. 図４５は、図１の穿刺具の側面図である。FIG. 45 is a side view of the puncture device of FIG. 図４６は、図１における穿刺具のプロテクタを取り外した状態を示す斜視図である。FIG. 46 is a perspective view showing a state where the protector of the puncture device in FIG. 1 is removed. 図４７は、図４４に示した穿刺具を示す縦断面図である。FIG. 47 is a longitudinal sectional view showing the puncture device shown in FIG. 図５８は、図４４の穿刺具を示す縦断面図であって、図５７と９０°異ななる縦断面図である。58 is a longitudinal sectional view showing the puncture device of FIG. 44 and is a longitudinal sectional view different from FIG. 57 by 90 °. 図４９は、プロテクタの斜視図である。FIG. 49 is a perspective view of the protector. 図５０は、従来の穿刺具にかかる動作状態を側面図である。FIG. 50 is a side view showing an operation state of a conventional puncture device.
　１　　　　　　　穿刺具
　２　　　　　　　カテーテル
２１　　　　　　外針
２２　　　　　　外針ハブ
　２２Ａ　　　　　翼（突起部位）
２２Ｂ　　　　　分岐管（突起部位）
　２２Ｃ　　　　　段差部
３　　　　　　　内針
　４　　　　　　　注射具
　５　　　　　　　プロテクタ
　５Ａ～５Ｄ　　　接触部
５Ｅ　　　　　　外針係止部
　５ａ　　　　　　外針係止部
　５ｂ　　　　　　本体部
　５ｃ１　　　　　開口部（下面側）
　５ｃ２　　　　　開口部（円筒部反対側端部側）
　５ｄ　　　　　　リブ状フレーム
　５ｄ１　　　　　リブ状フレーム延設部
　５ｅ　　　　　　被係止突起
　５ｆ　　　　　　接触部
　５ｇ　　　　　　接触部
　５ｈ　　　　　　被ガイド部
　５ｉ　　　　　　被ガイド部
６　　　　　　　外筒（筒状体）
　７　　　　　　　内筒（筒状体）
　７Ａ　　　　　　上部
　７Ｂ　　　　　　下部
　４１　　　　　　内針ハブ
　４１ａ　　　　　本体部　
　４１ｂ　　　　　嵌合部　
　４１ｂ１　　　　係止孔
　４１ｃ　　　　　開口部
　４１ｄ　　　　　貫通孔
　４１ｅ　　　　　リブ状突起
　４１ｆ　　　　　押え突起　
４１ｇ　　　　　リブ状突起
　４１ｈ　　　　　凸部
４２　　　　　　尾栓
　４２ａ　　　　　針接続部
　５１　　　　　　外針係止部
５２　　　　　　支持脚部
５２ａ　　　　　係止爪
５３　　　　　　開口部
６１　　　　　　溝部
　６２　　　　　　アーム開閉部（把持手段）
　７１　　　　　　首部
　７１Ａ　　　　　アーム（把持手段）
　７２　　　　　　軸部
　７２Ａ　　　　　突出部
　７２Ｂ　　　　　起立片
　７３　　　　　　貫通孔
　７３Ａ，７３Ｂ　溝部
　７４　　　　　　内部空間
　７４Ａ，７４Ｂ　凹部
　１１０　　　　　患者の身体
　発明を実施するための形態 DESCRIPTION OF SYMBOLS 1 Puncture tool 2 Catheter 21 Outer needle 22 Outer needle hub 22A Wing (projection part)
22B Branch pipe (projection part)
22C Stepped portion 3 Inner needle 4 Injection tool 5 Protector 5A to 5D Contact portion 5E Outer needle locking portion 5a Outer needle locking portion 5b Main body portion 5c1 Opening portion (lower surface side)
5c2 opening (on the opposite side of the cylindrical part)
5d rib-like frame 5d1 rib-like frame extending portion 5e locked protrusion 5f contact portion 5g contact portion 5h guided portion 5i guided portion 6 outer cylinder (tubular body)
7 Inner cylinder (tubular body)
7A Upper part 7B Lower part 41 Inner needle hub 41a Body part
41b Fitting part
41b1 Locking hole 41c Opening 41d Through hole 41e Rib-shaped protrusion 41f Presser protrusion
41g Rib-shaped projection 41h Convex part 42 Tail plug 42a Needle connection part 51 Outer needle locking part 52 Support leg part 52a Locking claw 53 Opening part 61 Groove part 62 Arm opening / closing part (gripping means)
71 Neck 71A Arm (gripping means)
72 Shaft portion 72A Protruding portion 72B Standing piece 73 Through hole 73A, 73B Groove portion 74 Internal space 74A, 74B Recessed portion 110 Patient's body Form for carrying out the invention
（第１の実施形態）
　以下、本発明の第１の実施形態にかかる穿刺具について、図１乃至図１２に基づいて説明する。
　穿刺具１は、図１および図２に示すように、外針２１と、前記外針２１に先端部（紙面左端部）が挿入される内針３と、前記内針３の一端部（基端部）を保持する筒状の注射具４と、前記外針２１および前記内針３を覆うプロテクタ５とを備えている。また、前記穿刺具１において、前記内針３を除く全ての部品は樹脂製である。尚、図１では、前記外針２１および前記内針３は、前記プロテクタ５に覆われて見ることができない。
また、前記カテーテル２は、図２、３に示すように可撓性を有する中空の管からなる外針２１と、外針２１の基端部を保持する外針ハブ２２とを有する。 (First embodiment)
Hereinafter, a puncture device according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the puncture device 1 includes an outer needle 21, an inner needle 3 into which a distal end portion (left end portion on the paper surface) is inserted into the outer needle 21, and one end portion (base) of the inner needle 3. And a protector 5 that covers the outer needle 21 and the inner needle 3. Moreover, in the puncture device 1, all parts except the inner needle 3 are made of resin. In FIG. 1, the outer needle 21 and the inner needle 3 are covered with the protector 5 and cannot be seen.
The catheter 2 includes an outer needle 21 made of a flexible hollow tube and an outer needle hub 22 that holds the proximal end portion of the outer needle 21 as shown in FIGS.
　前記注射具４は、図２～図５に示すように、筒状の内針ハブ４１と、前記内針ハブ４１の基端（紙面右端）に圧入によって取り付けられると共に、前記内針３の基端部が保持される略円筒状の針保持部４２ａを有する尾栓４２とを備えている。 As shown in FIGS. 2 to 5, the injection device 4 is attached to a cylindrical inner needle hub 41 and a proximal end (right end of the paper surface) of the inner needle hub 41 by press fitting. And a tail plug 42 having a substantially cylindrical needle holding portion 42a for holding the end portion.
　また、前記注射具４は、前記内針ハブ４１の内部に進退自在に取り付けられた外筒６と、前記外針ハブ２２を把持する４つのアーム７１Ａを有し、前記外筒６の内部に進退自在に取付けられた内筒７とを備えている。
　尚、本実施形態では、前記内筒７に、前記４つのアーム７１Ａが形成された場合を示しているが、２つ以上のアームで外針ハブ２２を保持できれば良い。 The injection tool 4 has an outer cylinder 6 attached to the inside of the inner needle hub 41 so as to be able to advance and retreat, and four arms 71A for gripping the outer needle hub 22. And an inner cylinder 7 attached so as to be freely advanced and retracted.
In the present embodiment, the case where the four arms 71A are formed on the inner cylinder 7 is shown, but it is sufficient that the outer needle hub 22 can be held by two or more arms.
　前記外筒６は、図６に示すように、前記外筒６の軸部６４の軸線に沿って形成された（内筒７の進退方向に沿って形成された）溝部６１と、前記４つのアーム７１Ａを収容するアーム開閉部６２とを備え、全体として筒状に形成されている。
　尚、前記４つのアーム７１Ａは、前記アーム開閉部６２の内面の両側部に形成されたガイド溝部６２Ａに、案内されながら進退可能に形成されている。 As shown in FIG. 6, the outer cylinder 6 includes a groove 61 formed along the axis of the shaft 64 of the outer cylinder 6 (formed along the advancing and retreating direction of the inner cylinder 7), and the four The arm opening / closing part 62 that accommodates the arm 71A is provided, and is formed in a cylindrical shape as a whole.
The four arms 71A are formed so as to be able to advance and retract while being guided by guide groove portions 62A formed on both sides of the inner surface of the arm opening / closing portion 62.
　前記溝部６１は、図５、図６（ｃ）に示すように、前記外筒６の周面における上部および下部の２箇所に対称となるように形成されている。
　また、前記アーム開閉部６２は、図４、図５に示すように、前記外筒６に前記内筒７が収容されている場合には、前記４つのアーム７１Ａは閉じられ前記外針ハブ２２を把持する。
　一方、前記外筒６から前記内筒７が引抜かれた（進出した）場合には、図１１、図１２に示すように、ガイド溝部６２Ａ（アーム開閉部６２）による規制がなくなるため、アーム７１Ａ自体の弾発力により、前記４つのアーム７１Ａは開き、前記外針ハブ２２を解放する。 As shown in FIG. 5 and FIG. 6 (c), the groove 61 is formed so as to be symmetrical at two locations, the upper portion and the lower portion, on the peripheral surface of the outer cylinder 6.
4 and 5, when the inner cylinder 7 is accommodated in the outer cylinder 6, the four arms 71A are closed and the outer needle hub 22 is closed. Grip.
On the other hand, when the inner cylinder 7 is pulled out (advanced) from the outer cylinder 6, as shown in FIG. 11 and FIG. 12, the restriction by the guide groove 62A (arm opening / closing section 62) is eliminated. The four arms 71A are opened by the elastic force of itself, and the outer needle hub 22 is released.
　このように、前記４つのアーム７１Ａと、前記アーム開閉部６２とによって、前記外針ハブ２２を把持する把持手段が構成され、前記４つのアーム７１Ａがアーム開閉部６２内に後退している状態にあっては、図４、図５に示すように、外針ハブ２２を把持する状態となり、前記４つのアーム７１Ａがアーム開閉部６２から進出している状態にあっては、図１１、図１２に示すように、外針ハブ２２を解放する状態となる。 As described above, the four arms 71A and the arm opening / closing part 62 constitute a gripping means for gripping the outer needle hub 22, and the four arms 71A are retracted into the arm opening / closing part 62. 4 and 5, the outer needle hub 22 is gripped, and the four arms 71A are advanced from the arm opening / closing portion 62, as shown in FIGS. 12, the outer needle hub 22 is released.
　具体的には、前記４つのアーム７１Ａは、図３に示すように、内筒７の周面に対して、予め開いた形状に形成されている。
　そして、前記外筒６のガイド溝６２Ａ（図６参照）に、前記内筒７のアーム７１Ａを挿入（収容）されている場合には、前記４つのアーム７１Ａは前記アーム開閉部６２によって閉じた状態になされている。即ち、前記アーム開閉部６２は、前記４つのアーム７１Ａを閉じ、前記４つのアーム７１Ａが前記外針ハブ２２を把持する状態になされている。 Specifically, as shown in FIG. 3, the four arms 71 </ b> A are formed in a shape opened in advance with respect to the peripheral surface of the inner cylinder 7.
When the arm 71A of the inner cylinder 7 is inserted (accommodated) in the guide groove 62A (see FIG. 6) of the outer cylinder 6, the four arms 71A are closed by the arm opening / closing part 62. Is in a state. That is, the arm opening / closing part 62 closes the four arms 71 </ b> A so that the four arms 71 </ b> A grip the outer needle hub 22.
　また、前記外筒６から前記内筒７が引き抜かれる（進出する）と、図１１、図１２に示すように、前記４つのアーム７１Ａは前記アーム開閉部６２から抜出されて、元の開いた状態に戻る。即ち、前記アーム開閉部６２によって、前記４つのアーム７１Ａは開状態となり、前記４つのアーム７１Ａは前記カテーテル２を解放する状態となる。 Further, when the inner cylinder 7 is pulled out (advanced) from the outer cylinder 6, the four arms 71A are extracted from the arm opening / closing part 62 as shown in FIGS. Return to the state. That is, the four arms 71A are opened by the arm opening / closing part 62, and the four arms 71A are in a state of releasing the catheter 2.
　前記内筒７は、図７に示すように、前記４つのアーム７１Ａを備えた首部７１と、前記首部７１よりも縮径した軸部７２と、前記首部７１および前記軸部７２の中心を貫通し、前記内針３を挿通させる貫通孔７３とを有し、全体として筒状に成形されている。
　前記軸部７２は、前記外筒６の前記溝部６１内に移動可能に収容される突出部７２Ａと、前記貫通孔７３内の内針３によって押し出されて起立し、前記溝部６１に係合する起立片７２Ｂとを備えている。 As shown in FIG. 7, the inner cylinder 7 passes through a neck portion 71 having the four arms 71 </ b> A, a shaft portion 72 having a diameter smaller than that of the neck portion 71, and the centers of the neck portion 71 and the shaft portion 72. And it has the through-hole 73 which penetrates the said inner needle 3, and is shape | molded by the cylinder shape as a whole.
The shaft portion 72 is pushed up by the protruding portion 72 </ b> A movably accommodated in the groove portion 61 of the outer cylinder 6 and the inner needle 3 in the through hole 73, and engages with the groove portion 61. And an upright piece 72B.
　前記突出部７２Ａは、前記溝部６１のそれぞれに対応するように、前記軸部７２の上面および下面の２箇所に対称となるように形成されている（図５参照）。そして、前記溝部６１と前記突出部７２Ａとによって、前記外筒６に対する前記内筒７の進退方向（内筒７に対する前記外筒６の進退方向）を規制している。
　尚、前記内筒７を前記外筒６に対して進出させた際、前記外筒６および内筒７は互いに分離することのないように、溝部６１の端部に前記突出部７２Ａが係止されるように構成されている。 The protrusions 72A are formed so as to be symmetrical at two locations on the upper surface and the lower surface of the shaft portion 72 so as to correspond to the groove portions 61 (see FIG. 5). The groove 61 and the protrusion 72 </ b> A regulate the advance / retreat direction of the inner cylinder 7 relative to the outer cylinder 6 (the advance / retreat direction of the outer cylinder 6 relative to the inner cylinder 7).
When the inner cylinder 7 is advanced with respect to the outer cylinder 6, the protruding portion 72A is engaged with the end of the groove 61 so that the outer cylinder 6 and the inner cylinder 7 are not separated from each other. It is configured to be.
　ここで、前記内筒７は、図８に示すように、前記起立片７２Ｂを備えた下部７Ａ（紙面左側）と、中心線ｌを挟んで反対側に形成された上部７Ｂ（紙面右側）とを一体として形成された部品であり、前記上部７Ａおよび前記下部７Ｂを折曲げ線（中心線ｌ）を中心に折り畳むことによって形成される。 Here, as shown in FIG. 8, the inner cylinder 7 includes a lower portion 7A (left side of the paper surface) provided with the upright piece 72B, and an upper portion 7B (right side of the paper surface) formed on the opposite side across the center line l. Are formed by folding the upper part 7A and the lower part 7B around a fold line (center line 1).
　また、前記下部７Ａおよび前記上部７Ｂの中央には、前記内筒７の軸線方向に沿って断面半円状の溝部７３Ａ，７３Ｂがそれぞれ形成されている。これらの溝部７３Ａ，７３Ｂは、前記下部７Ａおよび前記上部７Ｂを折り畳むことによって、一つの貫通孔７３が形成される。 Further, in the center of the lower portion 7A and the upper portion 7B, groove portions 73A and 73B having a semicircular cross section are formed along the axial direction of the inner cylinder 7, respectively. These groove portions 73A and 73B are formed with one through-hole 73 by folding the lower portion 7A and the upper portion 7B.
　また、前記起立片７２Ｂは、図５に示すように、前記貫通孔７３に前記内針３が挿入される（収容される）ことによって、前記内針３の周面よって押し出されて起立し、前記溝部６１の端部に係合する。
　ここで、前記起立片７２Ｂは、前記溝部６１のうち、前記カテーテル２側の端部に係合するので、前記内筒７の前記首部７１と共働して前記外筒６を挟み込むようにして前記外筒６に係止される。
　換言すれば、前記起立片７２Ｂは、前記貫通孔７３に内針３が存在する場合には、前記内針３によって起立し、外筒６と内筒７が一体となり、前記内筒７の前記外筒６からの引抜きが規制される。 Further, as shown in FIG. 5, the upright piece 72 </ b> B is pushed out by the peripheral surface of the inner needle 3 when the inner needle 3 is inserted (accommodated) into the through-hole 73, and stands. Engage with the end of the groove 61.
Here, the upright piece 72B engages with the end portion on the catheter 2 side of the groove portion 61, so that it cooperates with the neck portion 71 of the inner cylinder 7 so as to sandwich the outer cylinder 6 therebetween. Locked to the outer cylinder 6.
In other words, when the inner needle 3 is present in the through hole 73, the upright piece 72 </ b> B is raised by the inner needle 3, and the outer cylinder 6 and the inner cylinder 7 are integrated, and the Drawing from the outer cylinder 6 is restricted.
　また、前記起立片７２Ｂは、前記貫通孔７３内から前記内針３が引き抜かれ、内針３による押し出しがなくなると、前記貫通孔７３を閉塞するようにして前記内筒７の内部に収納され（復帰し）、前記溝部６１との係合が解除される。
　換言すれば、前記起立片７２Ｂは、前記貫通孔７３に内針３が存在しない場合には、前記外筒６に係止されないため、外筒６と内筒７とが分離可能となり、前記外筒６から前記内筒７を引抜くことができる。 Further, the upright piece 72B is housed in the inner cylinder 7 so as to close the through hole 73 when the inner needle 3 is pulled out from the through hole 73 and is not pushed out by the inner needle 3. (Reset), the engagement with the groove 61 is released.
In other words, the standing piece 72B is not locked to the outer cylinder 6 when the inner needle 3 is not present in the through-hole 73, so that the outer cylinder 6 and the inner cylinder 7 can be separated, and the outer The inner cylinder 7 can be extracted from the cylinder 6.
　尚、前記内針ハブ４１、および前記外筒６の夫々の端部４１ａ，６３には係合部が形成されており、伸長した際、前記端部４１ａ，６３に形成された係合部が係止することによって、互いに分離（離間）することのないように構成されている。 The inner needle hub 41 and the end portions 41a and 63 of the outer cylinder 6 are formed with engaging portions, and when extended, the engaging portions formed on the end portions 41a and 63 are formed. By being locked, they are configured not to be separated (separated) from each other.
　次に、このような穿刺具１を使用する場合について説明する。
　まず、図１、図４に示す穿刺具１からプロテクタ５を外し、図２に示すようにカテーテル２および内針３を露出させる。そして、図９に示すように、前記外針２１および前記内針３を血管（患者の身体１１０）に穿刺する。 Next, the case where such a puncture device 1 is used will be described.
First, the protector 5 is removed from the puncture device 1 shown in FIGS. 1 and 4, and the catheter 2 and the inner needle 3 are exposed as shown in FIG. Then, as shown in FIG. 9, the outer needle 21 and the inner needle 3 are punctured into the blood vessel (the patient's body 110).
　その後、前記外針２１を留め置きするために、前記内針ハブ４１を軸方向に沿って前記外針２１から離間する方向に移動させる（引抜動作を行う）。この内針ハブ４１の引抜き動作により、前記注射具４は伸長する。 Thereafter, in order to retain the outer needle 21, the inner needle hub 41 is moved along the axial direction in a direction away from the outer needle 21 (withdrawing operation is performed). By the pulling-out operation of the inner needle hub 41, the injection tool 4 is extended.
　具体的には、前記外針２１を留置した状態において、前記内針ハブ４１を軸方向に沿って前記外針２１から離間させる（図９に示す矢印方向に引抜動作を行う）と、前記内針ハブ４１が軸方向に沿って移動し、前記注射具４は全体として伸長することになる。このとき、外針ハブ２２は内筒７によって保持され、内筒７と外筒６は起立片７２Ｂによって一体化している。 Specifically, in a state where the outer needle 21 is indwelled, when the inner needle hub 41 is separated from the outer needle 21 along the axial direction (withdrawing operation in the direction of the arrow shown in FIG. 9), The needle hub 41 moves along the axial direction, and the injection device 4 extends as a whole. At this time, the outer needle hub 22 is held by the inner cylinder 7, and the inner cylinder 7 and the outer cylinder 6 are integrated by the standing piece 72B.
　したがって、内針３の後端部（基端部）を保持する内針ハブ４１を軸方向に沿って移動すると、内針３も同様に軸方向に沿って移動する。そして、外針２１内から引出されることで、引抜き出された内針３が内筒７、外筒６、内針ハブ４１内に覆われる（図１０参照）。 Therefore, when the inner needle hub 41 holding the rear end portion (base end portion) of the inner needle 3 is moved along the axial direction, the inner needle 3 is similarly moved along the axial direction. And by pulling out from the outer needle 21, the extracted inner needle 3 is covered in the inner cylinder 7, the outer cylinder 6, and the inner needle hub 41 (see FIG. 10).
　更に、前記内針ハブ４１を軸方向に沿って前記外針２１から離間させる。そして、図１１に示すように、内針３の先端が起立片７２Ｂを通過すると、起立片７２Ｂは前記内針３の側面から力を受けない状態となり、元の状態に戻り、貫通孔７３を閉塞する。
　これにより、内針ハブ４１をカテーテル２側に移動させる力が作用しても、内針３は、前記起立片７２Ｂによって移動が規制され、再び外針２１内に戻ることはない。 Further, the inner needle hub 41 is separated from the outer needle 21 along the axial direction. As shown in FIG. 11, when the tip of the inner needle 3 passes through the upright piece 72B, the upright piece 72B is not subjected to a force from the side surface of the inner needle 3, returns to the original state, and passes through the through hole 73. Block.
Thereby, even if the force which moves the inner needle hub 41 to the catheter 2 side acts, the movement of the inner needle 3 is regulated by the upright piece 72B and does not return into the outer needle 21 again.
　更に、前記内針３による起立片７２Ｂの押し出しが解除されると、前記外筒６との係止状態が解除される。その結果、外筒６と内筒７が分離可能となり、前記内針ハブ４１の移動に伴って、前記外筒６が軸方向に沿って移動することになる。
　このとき、前記溝部６１は前記突出部７２Ａに案内されるため、前記内筒７の突出部７２Ａに案内されながら、前記外筒６は前記内針ハブ４１から引抜き出される。 Further, when the push-out of the upright piece 72B by the inner needle 3 is released, the locked state with the outer cylinder 6 is released. As a result, the outer cylinder 6 and the inner cylinder 7 can be separated, and the outer cylinder 6 moves along the axial direction as the inner needle hub 41 moves.
At this time, since the groove 61 is guided by the protrusion 72A, the outer cylinder 6 is pulled out from the inner needle hub 41 while being guided by the protrusion 72A of the inner cylinder 7.
　更に、前記内針ハブ４１を軸方向に沿って前記外針２１から離間させ、前記外筒６を移動させ、前記外筒６から前記内筒７が抜出されると、図１１に示すように、前記４つのアーム７１Ａを開いて、前記４つのアーム７１Ａによる外針ハブ２２の保持状態を解放する。
　即ち、前記内針ハブ４１を軸方向に沿って前記外針２１から離間させて前記注射具４を伸長させることによって、前記カテーテル２から抜出された前記内針３が前記内筒７、外筒６、内針ハブ４１の内部に収容されると、前記４つのアーム７１Ａとアーム開閉部６２による外針ハブ２２の保持状態から、外針ハブ２２を解放する。 Furthermore, when the inner needle hub 41 is moved away from the outer needle 21 along the axial direction, the outer cylinder 6 is moved, and the inner cylinder 7 is extracted from the outer cylinder 6, as shown in FIG. The four arms 71A are opened to release the holding state of the outer needle hub 22 by the four arms 71A.
That is, when the inner needle hub 41 is separated from the outer needle 21 along the axial direction and the injection device 4 is extended, the inner needle 3 extracted from the catheter 2 is moved into the inner cylinder 7 and the outer tube 7. When housed inside the cylinder 6 and the inner needle hub 41, the outer needle hub 22 is released from the state in which the outer needle hub 22 is held by the four arms 71A and the arm opening / closing portion 62.
　これによって、図１２に示すように、前記カテーテル２（外針２１）を血管に留置しつつ、前記内針３を前記外針２１から引抜き出して前記内針ハブ４の内部に収容するとともに、前記外針ハブ２２は前記注射具４から取り外される。
　このように、前記穿刺具１は、前記内針３を前記外針２１から引抜き動作のみによって、前記内針３を前記内針ハブ４の内部に収容することができ、しかも前記外針ハブ２２を前記内針ハブ４から取り外すことができる。 Thereby, as shown in FIG. 12, while the catheter 2 (outer needle 21) is placed in the blood vessel, the inner needle 3 is pulled out from the outer needle 21 and accommodated in the inner needle hub 4, The outer needle hub 22 is removed from the injection tool 4.
Thus, the puncture device 1 can accommodate the inner needle 3 in the inner needle hub 4 only by pulling out the inner needle 3 from the outer needle 21, and the outer needle hub 22. Can be removed from the inner needle hub 4.
　尚、第１の実施形態では、筒状体が前記外筒６、および前記内筒７によって構成されている場合を例にとって説明したが、特にこの構成に限定されるものではなく、例えば、前記内針ハブと外筒、内筒とを延伸する中継筒を備えた穿刺具であっても良い。前記筒状体はカテーテルを把持する把持手段を有し、内針ハブの内部に進退自在に挿入できるように（収容できるように）取り付けられていれば良い。 In the first embodiment, the case where the cylindrical body is configured by the outer cylinder 6 and the inner cylinder 7 has been described as an example. However, the present invention is not particularly limited to this configuration. The puncture device may include a relay cylinder that extends the inner needle hub, the outer cylinder, and the inner cylinder. The cylindrical body has a gripping means for gripping the catheter, and may be attached so that it can be inserted into and retracted from the inner needle hub.
　また、第１の実施形態では、把持手段として、前記４つのアーム７１Ａと、前記アーム開閉部６２とによって構成されている場合を例にとって説明したが、特にこの構成に限定されるものではない。前記把持手段は、内針ハブを軸方向に沿って外針から離間させて、注射具を伸長させることによって、外針から引き抜かれた内針が筒状体の内部に収容された際、外針ハブを解放することができるように構成されていれば良い。 In the first embodiment, the case where the gripping means is configured by the four arms 71A and the arm opening / closing unit 62 has been described as an example, but the present invention is not particularly limited to this configuration. When the inner needle pulled out from the outer needle is accommodated inside the cylindrical body by separating the inner needle hub from the outer needle along the axial direction and extending the injection tool, the gripping means What is necessary is just to be comprised so that a needle hub can be released.
　このように、上記した第１の実施形態にあっては、外針と、前記外針の基端部を保持する外針ハブと、前記外針に先端部が挿入される内針と、前記内針の基端部を保持する筒状の注射具とを備える穿刺具であって、前記注射具は、前記内針の基端部を保持する内針ハブと、前記外針ハブを把持する把持手段を有すると共に、前記内針ハブの内部に進退自在に取付けられた筒状体と、を備え、前記内針ハブを軸方向に沿って前記外針から離間させて、前記注射具を伸長させることによって、前記外針から引抜かれた前記内針が、前記内針ハブの内部、あるいは内針ハブの内部と筒状体内部に収容されると共に、前記把持手段が前記外針ハブを解放し、前記外針ハブが前記内針ハブから取り外されることを特徴としている。 Thus, in the above-described first embodiment, the outer needle, the outer needle hub that holds the proximal end portion of the outer needle, the inner needle in which the distal end portion is inserted into the outer needle, A puncture device comprising a cylindrical injection tool for holding a proximal end portion of an inner needle, wherein the injection tool grips an inner needle hub for holding the proximal end portion of the inner needle and the outer needle hub. A cylindrical body having a gripping means and movably attached to the inside of the inner needle hub, and extending the injection device by separating the inner needle hub from the outer needle along the axial direction. As a result, the inner needle pulled out from the outer needle is accommodated in the inner needle hub or in the inner needle hub and the cylindrical body, and the gripping means releases the outer needle hub. The outer needle hub is detached from the inner needle hub.
　このような構成によれば、内針ハブを軸方向に沿って離間させて（引抜き）、注射具を伸長させることによって、外針から引き抜かれた内針は内針ハブの内部に収容され、また把持手段は、外針ハブの把持を解除（解放）する。
　したがって、内針を外針から引抜く動作のみによって、外針ハブを内針ハブから取り外すことができ、患者に対して苦痛を与える等の虞がなく、スムーズな取り外しを容易に行うことができる。また、内針を内針ハブの内部に必ず収容されるため、作業者の安全性を確保することができる。 According to such a configuration, by separating the inner needle hub along the axial direction (withdrawal) and extending the injection tool, the inner needle withdrawn from the outer needle is accommodated in the inner needle hub, The gripping means releases (releases) gripping of the outer needle hub.
Therefore, the outer needle hub can be removed from the inner needle hub only by the operation of pulling the inner needle out of the outer needle, and there is no risk of causing pain to the patient, and smooth removal can be easily performed. . Further, since the inner needle is always accommodated in the inner needle hub, the safety of the operator can be ensured.
　ここで、前記筒状体は、前記内針ハブの内部に進退自在に取り付けられる外筒と、前記外針ハブを把持する複数のアームを有し、前記外筒の内部に進退自在に取付けられた内筒と、を備え、前記外筒は、前記外筒内部に前記内筒が収容され、あるいは前記外筒内部から引抜かれることにより、前記複数のアームの開閉が行われるアーム開閉部を有し、前記内筒には、前記内針が挿通する貫通孔と、前記貫通孔の前記内針によって押出されて起立し、外筒に係止される起立片と、前記アーム開閉部により開閉するカテーテルを把持する複数のアームと、を有し、前記内針ハブを軸方向に沿って前記外針から離間させて、前記内針を引抜くことにより、前記起立片による外筒と内筒の係止状態が解除され、前記外筒のアーム開閉部を内筒に対して移動させ、外針ハブを把持する複数のアームを開放することによって、前記外針ハブが前記内針ハブから取り外されることが望ましい。 Here, the cylindrical body has an outer cylinder that is movably attached to the inside of the inner needle hub, and a plurality of arms that grip the outer needle hub, and is attached to the inside of the outer cylinder so as to be able to advance and retract. The outer cylinder has an arm opening / closing part that opens and closes the plurality of arms by accommodating the inner cylinder inside the outer cylinder or by being pulled out of the outer cylinder. The inner cylinder is opened and closed by a through hole through which the inner needle is inserted, an upright piece that is pushed out by the inner needle of the through hole and is locked to the outer cylinder, and the arm opening / closing portion. A plurality of arms for gripping the catheter, and by separating the inner needle hub from the outer needle along the axial direction and pulling out the inner needle, The locked state is released, and the arm opening / closing part of the outer cylinder is connected to the inner cylinder. The moved, by opening a plurality of arms for gripping the outer needle hub, it is desirable that the outer needle hub is removed from the inner needle hub.
　このように、内針ハブを軸方向に沿って前記外針から離間させる方向に、前記内針を引抜くことにより、前記起立片による外筒と内筒の係止状態が解除され、前記外筒のアーム開閉部を内筒に対して移動させることができる。そして、前記外筒を内筒に対して移動させることにより、複数のアームによる外針ハブの把持状態を解放し、前記外針ハブは前記内針ハブから取り外される。
　即ち、内針を外針から引抜く動作のみによって、内針を内針ハブの内部に収容することができ、しかも外針ハブを内針ハブから取り外すことができる。 Thus, by pulling out the inner needle in the direction of separating the inner needle hub from the outer needle along the axial direction, the locked state of the outer cylinder and the inner cylinder by the standing piece is released, and the outer The arm opening / closing part of the cylinder can be moved with respect to the inner cylinder. Then, by moving the outer cylinder relative to the inner cylinder, the gripping state of the outer needle hub by a plurality of arms is released, and the outer needle hub is removed from the inner needle hub.
That is, the inner needle can be accommodated in the inner needle hub only by pulling the inner needle out of the outer needle, and the outer needle hub can be removed from the inner needle hub.
　また、前記外筒の周面に前記外筒の軸線に沿って溝部が形成されると共に、前記内筒の外周面には前記溝部内に収容される突出部が形成され、前記溝部及び突出部によって、前記内筒に対する外筒の進退方向が規制されることが望ましい。
　この場合には、溝部と、突出部とによって、内筒に対する外筒の進退方向は規制されるので、内針ハブ本体を軸方向に沿って外針から離間させる方向に引抜くことができる。 In addition, a groove portion is formed on the outer peripheral surface of the outer cylinder along the axis of the outer cylinder, and a protrusion portion accommodated in the groove portion is formed on the outer peripheral surface of the inner cylinder. Therefore, it is desirable that the forward / backward direction of the outer cylinder with respect to the inner cylinder is restricted.
In this case, the advancing and retreating direction of the outer cylinder with respect to the inner cylinder is regulated by the groove and the protrusion, and therefore the inner needle hub body can be pulled out in the direction away from the outer needle along the axial direction.
　また、前記起立片による外筒と内筒の係止状態が解除され、前記内針の先端が起立片を通過して引き抜かれた際、前記起立片が内針の貫通孔を閉塞することが望ましい。
　この場合には、内針が筒状体の内部に一度収容されると、内針の外針側への進路（内針の貫通孔）は起立片にて閉塞されるので、内針は筒状体の外部に再び飛び出すことはない。したがって、内針を内針ハブの内部に確実に収納することができる。 Further, when the outer cylinder and the inner cylinder are unlocked by the standing piece and the tip of the inner needle is pulled out through the standing piece, the standing piece may block the through hole of the inner needle. desirable.
In this case, once the inner needle is accommodated in the cylindrical body, the path to the outer needle side of the inner needle (through hole of the inner needle) is closed by the standing piece, so the inner needle is It will not jump out of the body again. Therefore, the inner needle can be securely stored in the inner needle hub.
　以上のように、この実施形態によれば、内針を外針から引抜く動作のみによって、内針を内針ハブの内部に収容することができると共に、外針ハブを内針ハブから取り外すことができる穿刺具を得ることができる。 As described above, according to this embodiment, the inner needle can be accommodated in the inner needle hub only by pulling the inner needle from the outer needle, and the outer needle hub can be removed from the inner needle hub. It is possible to obtain a puncture device that can be used.
（第２の実施形態）
次に、第２の実施形態について、図１３乃至図１６に基づいて説明する。尚、第1の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。
　この実施形態は上記した第1の実施形態を改良したものであり、外針ハブ２２（カテーテル２）がプロテクタ５の内部で移動する（ガタつく）のを防止するものである。
　それにより、外針ハブ２２がプロテクタ５の内部で移動する（ガタつく）ことにより、図１３に点線で示すように、外針２１が内針２の先端を覆うことにより、穿刺することができない、あるいは外針ハブ２２が内筒７から脱落して穿刺することができないという課題を解決することができる。 (Second Embodiment)
Next, a second embodiment will be described based on FIGS. Note that the same members as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
This embodiment is an improvement of the first embodiment described above, and prevents the outer needle hub 22 (catheter 2) from moving (backlashing) inside the protector 5.
As a result, the outer needle hub 22 moves inside the protector 5 (backlash), so that the outer needle 21 covers the tip of the inner needle 2 as shown by the dotted line in FIG. Alternatively, the problem that the outer needle hub 22 cannot be removed from the inner cylinder 7 and punctured can be solved.
図１３に示すように、カテーテル２および前記内針３を覆うプロテクタ５は、内針ハブ４１の外周面と嵌合することによって取付けられ、その際、外筒６のアーム開閉部６２の外周部の端部もプロテクタ５の内周面と圧接している。また、外針ハブ２２は内筒７のアーム７１Ａに保持され、アーム７１Ａが外筒６のアーム開閉部６２のガイド溝６２Ａに圧接している。 As shown in FIG. 13, the protector 5 covering the catheter 2 and the inner needle 3 is attached by fitting with the outer peripheral surface of the inner needle hub 41, and at this time, the outer peripheral portion of the arm opening / closing portion 62 of the outer cylinder 6. Is also in pressure contact with the inner peripheral surface of the protector 5. The outer needle hub 22 is held by the arm 71A of the inner cylinder 7, and the arm 71A is in pressure contact with the guide groove 62A of the arm opening / closing part 62 of the outer cylinder 6.
この第２の実施形態は、図１４～図１６に示すように、プロテクタ５の内周面に、内針ハブ４１の外周面と圧接する接触部５Ａ，５Ｂ，５Ｃ，５Ｄを設けた点に特徴がある。
この接触部５Ａ，５Ｂ，５Ｃ，５Ｄは、プロテクタ５の内周面に突出すると共に、プロテクタ５の軸線に沿って、前記軸線と平行に延設されている。前記接触部５Ａ，５Ｂ，５Ｃ，５Ｄは、複数形成されていれば良く、例えば、図示されているように、４個設けられているのが好ましい。また、この接触部５Ａ，５Ｂ，５Ｃ，５Ｄは外筒６のアーム開閉部６２外周面に接しないのが好ましいが、接したとしても圧接しない方が好ましい。
尚、内針ハブ４１の外周面と接触部５Ａ，５Ｂ，５Ｃ，５Ｄとの圧接力は、内針ハブ４１の外周面と接触部接触部５Ａ，５Ｂ，５Ｃ，５Ｄとの摺動抵抗（引抜き力）を考慮して、接触部の幅、長さ、個数等が設定される。 In the second embodiment, as shown in FIGS. 14 to 16, the inner peripheral surface of the protector 5 is provided with contact portions 5A, 5B, 5C, and 5D that come into pressure contact with the outer peripheral surface of the inner needle hub 41. There are features.
The contact portions 5 </ b> A, 5 </ b> B, 5 </ b> C, and 5 </ b> D protrude from the inner peripheral surface of the protector 5 and extend along the axis of the protector 5 in parallel with the axis. The contact portions 5A, 5B, 5C, and 5D may be formed in a plurality. For example, it is preferable that four contact portions 5A, 5B, 5C, and 5D are provided as illustrated. Further, the contact portions 5A, 5B, 5C, 5D are preferably not in contact with the outer peripheral surface of the arm opening / closing portion 62 of the outer cylinder 6, but are preferably not in pressure contact even if they are in contact.
The pressure contact force between the outer peripheral surface of the inner needle hub 41 and the contact portions 5A, 5B, 5C, 5D is the sliding resistance between the outer peripheral surface of the inner needle hub 41 and the contact portion contact portions 5A, 5B, 5C, 5D ( The width, length, number, etc. of the contact portions are set in consideration of the pulling force.
また、プロテクタ５の先端部の内周面に、軸線方向に延設された外針ハブ係止部５Ｅが設けられている。この外針ハブ係止部５Ｅは円筒形状に形成され、中心部に設けられた空間部５Ｆ内に前記内針３の先端が位置すると共に、前記外針ハブ係止部５Ｅの端部が外針ハブ２２に当接するように構成されている。 An outer needle hub locking portion 5 </ b> E extending in the axial direction is provided on the inner peripheral surface of the tip portion of the protector 5. The outer needle hub locking portion 5E is formed in a cylindrical shape, the tip of the inner needle 3 is located in a space portion 5F provided at the center, and the end of the outer needle hub locking portion 5E is external. The needle hub 22 is configured to abut.
即ち、図１４に示すように、プロテクタ５がカテーテル２および前記内針３を覆った状態（プロテクタ５の装着状態）にあっては、内針ハブ４１の外周面とプロテクタ５の接触部５Ａ，５Ｂ，５Ｃ，５Ｄが圧接（嵌合）し、外針ハブ２２は外針ハブ係止部５Ｅに当接する。
そのため、プロテクタ５の装着状態にあっては、外針ハブ２２（カテーテル２）の前方への移動は外針ハブ係止部５Ｅによって阻止され、外針ハブ２２（カテーテル２）の後方への移動はプロテクタ５に嵌合した内針ハブ４１によって阻止される。
その結果、カテーテル２は固定された状態になされ、カテーテル２の移動は阻止される。 That is, as shown in FIG. 14, when the protector 5 covers the catheter 2 and the inner needle 3 (when the protector 5 is attached), the outer peripheral surface of the inner needle hub 41 and the contact portion 5A of the protector 5 5B, 5C, and 5D are press-contacted (fitted), and the outer needle hub 22 contacts the outer needle hub locking portion 5E.
Therefore, when the protector 5 is mounted, the outer needle hub 22 (catheter 2) is prevented from moving forward by the outer needle hub locking portion 5E, and the outer needle hub 22 (catheter 2) is moved rearward. Is blocked by the inner needle hub 41 fitted to the protector 5.
As a result, the catheter 2 is fixed and movement of the catheter 2 is prevented.
そして、前記プロテクタ５を取り外す際（図１３のＸ方向に移動させた際）、前記接触部５Ａ，５Ｂ，５Ｃ，５Ｄは、外筒６のアーム開閉部６２に接しないか、あるいは接したとしても圧接していないため、プロテクタ５が移動しても、外筒６のアーム開閉部６２がＸ方向に移動することはなく、その位置に留まる。
その結果、前記プロテクタ５を取り外した場合においても、内針３に対して外針ハブ２２（カテーテル２）は移動しないため、外針２１が内針３の先端よりも前方に移動し、内針３の先端を覆う等の弊害を防止することができる。 When the protector 5 is removed (when moved in the X direction in FIG. 13), the contact portions 5A, 5B, 5C, and 5D are not in contact with or in contact with the arm opening / closing portion 62 of the outer cylinder 6. Therefore, even if the protector 5 moves, the arm opening / closing part 62 of the outer cylinder 6 does not move in the X direction and remains in that position.
As a result, even when the protector 5 is removed, the outer needle hub 22 (catheter 2) does not move relative to the inner needle 3, so the outer needle 21 moves forward from the tip of the inner needle 3, and the inner needle It is possible to prevent adverse effects such as covering the tip of 3.
（第３の実施形態）
次に、第３の実施形態について、図１７、図１８、図１９に基づいて説明する。尚、第1、第２の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。
この第３の実施形態は上記した第２の実施形態を更に改良したものであり、前記内針ハブと外筒との間に内筒を延伸する中継筒を設け、外針から内針ハブをより延伸できるように構成したものである。 (Third embodiment)
Next, a third embodiment will be described based on FIG. 17, FIG. 18, and FIG. Note that members similar to those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
This third embodiment is a further improvement of the above-described second embodiment. A relay cylinder is provided between the inner needle hub and the outer cylinder to extend the inner cylinder, and the inner needle hub is removed from the outer needle. It is configured so that it can be stretched more.
図１７、図１８に示すように、前記内針ハブ４１と外筒６との間に、外筒６を延伸する中継筒８が設けられている。この中継筒８は円筒形状に形成され、前記内針ハブ４１の内部に収納可能な外径寸法を有すると共に、外筒６を内部に収容可能な内径寸法を有している。この中継筒８の一端には係止部８ａが形成され、外筒６の端部６３に形成された係止部に係止されるように構成されている。またこの中継筒８の他端には係止部８ｂが形成され、内針ハブ４１の端部４１ａに形成された係止部に係止されるように構成されている。 As shown in FIGS. 17 and 18, a relay cylinder 8 that extends the outer cylinder 6 is provided between the inner needle hub 41 and the outer cylinder 6. The relay cylinder 8 is formed in a cylindrical shape, has an outer diameter dimension that can be accommodated in the inner needle hub 41, and an inner diameter dimension that can accommodate the outer cylinder 6 therein. A latching portion 8 a is formed at one end of the relay cylinder 8 and is configured to be latched by a latching portion formed at the end 63 of the outer cylinder 6. Further, a locking portion 8b is formed at the other end of the relay cylinder 8, and is configured to be locked to a locking portion formed at the end portion 41a of the inner needle hub 41.
更に、前記中継筒８の外周面には、中継筒８の中心軸線と平行に縦長の開口部８ｃが形成されている。また前記開口部８ｃは中継筒８の周方向に４個形成されている。
このように、前記中継筒８の外周面に開口部８ｃが形成されることにより、中継筒８に柔軟性が付与されるため、内針ハブ４１の引抜き動作方向が、斜め方向（内針３の延長線上ではない方向）になされ、中継筒８に曲げ力が加わった場合にも、中継筒８が座屈する等により破損するのを防止することができる。 Further, a vertically long opening 8 c is formed on the outer peripheral surface of the relay cylinder 8 in parallel with the central axis of the relay cylinder 8. Four openings 8 c are formed in the circumferential direction of the relay cylinder 8.
In this way, since the opening 8c is formed on the outer peripheral surface of the relay cylinder 8, the relay cylinder 8 is provided with flexibility, so that the pulling operation direction of the inner needle hub 41 is an oblique direction (inner needle 3 Even when a bending force is applied to the relay cylinder 8, it is possible to prevent the relay cylinder 8 from being damaged due to buckling or the like.
このように、この第３の実施形態にあっては、図１９に示すように、外針２１（カテーテル２）から内針ハブ４をより延伸できると共に、内針ハブ４１の引抜き動作方向が内針３の延長線上になく、中継筒８に曲げ力が加わった場合にも、中継筒８が座屈等により破損するのを防止することができる。 As described above, in the third embodiment, as shown in FIG. 19, the inner needle hub 4 can be further extended from the outer needle 21 (catheter 2), and the inner needle hub 41 can be pulled out in the direction in which the inner needle hub 41 is pulled out. Even when a bending force is applied to the relay cylinder 8 that is not on the extension line of the needle 3, the relay cylinder 8 can be prevented from being damaged due to buckling or the like.
（第４の実施形態）
次に、第４の実施形態について、図２０、図２１に基づいて説明する。尚、第1の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。 (Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. Note that the same members as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
前記した第１の実施形態において、内針ハブ４１の引抜き動作方向が、斜め方向（内針３の延長線上ではない方向）になされた場合、外筒６（外筒６の軸部６４）に曲げ力が加わる。そのため、外筒６を硬質の合成樹脂材料等で形成した場合、その曲げ力に耐えることができず、外筒６の軸部６４が座屈（折曲がり）等を起こし、破損する虞がある。
また、外筒６の軸部６４が座屈（折曲がり）等を起こし、破損等した場合、外筒６が内針ハブ４１から外れ、内針３が露出する虞れがある。 In the first embodiment described above, when the pulling operation direction of the inner needle hub 41 is an oblique direction (a direction not on the extension line of the inner needle 3), the outer cylinder 6 (the shaft portion 64 of the outer cylinder 6) Bending force is applied. Therefore, when the outer cylinder 6 is formed of a hard synthetic resin material or the like, the bending force cannot be withstood, and the shaft portion 64 of the outer cylinder 6 may be buckled (bent) or damaged. .
Further, when the shaft portion 64 of the outer cylinder 6 is buckled (bent) or the like and is damaged, the outer cylinder 6 may come off from the inner needle hub 41 and the inner needle 3 may be exposed.
この第４の実施形態は、前記第1の実施形態を改良したものであり、少なくとも外筒６をポリプロピレン等の軟質の合成樹脂材料によって形成された点に特徴がある。
具体的には、図２０，２１に示すように、内針ハブ４１の引抜き動作方向が、内針３の延長線上から角度θずれると、外筒６の軸部６４に曲げ力が作用する。
このとき、外筒６はポリプロピレン等の軟質の合成樹脂材料によって形成されているため、前記曲げ力によって外筒６の軸部６４は屈曲するが、割れ等の破損を防止することができる。また外筒６の軸部６４の破損等が防止される結果、外筒６が内針ハブ４１から外れ、内針３が露出する虞れもない。
尚、外筒６を形成する軟質の合成樹脂材料は、ＪＩＳ　Ｋ７１１３（プラスチックの試験方法）によって、伸び率が２００％以上の伸び率を有しているのが好ましい。具体的には、ポリプロピレンが好ましい。 The fourth embodiment is an improvement of the first embodiment, and is characterized in that at least the outer cylinder 6 is formed of a soft synthetic resin material such as polypropylene.
Specifically, as shown in FIGS. 20 and 21, when the pulling operation direction of the inner needle hub 41 is shifted by an angle θ from the extension line of the inner needle 3, a bending force acts on the shaft portion 64 of the outer cylinder 6.
At this time, since the outer cylinder 6 is formed of a soft synthetic resin material such as polypropylene, the shaft portion 64 of the outer cylinder 6 is bent by the bending force, but breakage such as cracking can be prevented. Further, as a result of preventing the shaft portion 64 of the outer cylinder 6 from being damaged, there is no possibility that the outer cylinder 6 is detached from the inner needle hub 41 and the inner needle 3 is exposed.
In addition, it is preferable that the soft synthetic resin material which forms the outer cylinder 6 has an elongation rate of 200% or more according to JIS K7113 (plastic testing method). Specifically, polypropylene is preferable.
また、上記実施形態では、外筒６を軟質の合成樹脂材料で形成する場合について説明したが、内針３以外の他の部品、具体的には、内針ハブ４１、内筒６、外針ハブ２２、外針２１についても、ポリプロピレン等の軟質の合成樹脂材料で形成するのが好ましい。
このように、内筒６、外筒７、内針ハブ４１についても、ポリプロピレン等の軟質の合成樹脂材料で形成した場合には、摺動抵抗を少なくすることができ、力のない使用者でも容易に取り扱うことができる。具体的には、ポリプロピレンを用いた場合には、内針ハブ４１の引抜き動作を０．８Ｎ（ニュートン）未満の力で行うことができる。 In the above embodiment, the case where the outer cylinder 6 is formed of a soft synthetic resin material has been described. However, other parts than the inner needle 3, specifically, the inner needle hub 41, the inner cylinder 6, and the outer needle. The hub 22 and the outer needle 21 are also preferably formed of a soft synthetic resin material such as polypropylene.
As described above, when the inner cylinder 6, the outer cylinder 7, and the inner needle hub 41 are formed of a soft synthetic resin material such as polypropylene, the sliding resistance can be reduced, and even a user without power It can be handled easily. Specifically, when polypropylene is used, the inner needle hub 41 can be pulled out with a force of less than 0.8 N (Newton).
尚、第３の実施形態において説明した中継筒８をポリプロピレン等の軟質の合成樹脂材料で形成しても良い。この場合、第３の実施形態において説明した開口部８ｃは必ずしも形成する必要はない。 Note that the relay cylinder 8 described in the third embodiment may be formed of a soft synthetic resin material such as polypropylene. In this case, the opening 8c described in the third embodiment is not necessarily formed.
（第５の実施形態）
更に、第５の実施形態について、図２２乃至図２３に基づいて説明する。尚、第1、第２の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。
この実施形態は上記した第２の実施形態を改良したものであり、内針ハブの外周面に使用者の使用する際、把持する把持部を形成し、使用者の利便性を図った点に特徴がある。 (Fifth embodiment)
Further, a fifth embodiment will be described with reference to FIGS. Note that members similar to those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
This embodiment is an improvement of the second embodiment described above, and is formed on the outer peripheral surface of the inner needle hub to form a gripping portion to be gripped when used by the user, thereby improving user convenience. There are features.
図２２に示すように、内針ハブ４１は円柱形状に形成されている。そのため、穿刺具１からプロテクタ５を外し、外針２１および内針３を血管（患者の身体１１０）に穿刺する際、前記円柱形状の内針ハブ本体４1をもって行われる。
しかしながら、使用者によっては、円柱形状の内針ハブ本体４1の外周面を持っての穿刺動作が行い難いという指摘がなされている。 As shown in FIG. 22, the inner needle hub 41 is formed in a cylindrical shape. Therefore, when the protector 5 is removed from the puncture device 1 and the outer needle 21 and the inner needle 3 are punctured into the blood vessel (the patient's body 110), the cylindrical inner needle hub body 41 is used.
However, it has been pointed out that depending on the user, it is difficult to perform the puncturing operation with the outer peripheral surface of the cylindrical inner needle hub body 41.
この第５の実施形態は、図２２、図２３に示すように、円柱形状の内針ハブ４１の先端部外周面に、前記内針ハブ４１の中心軸線と平行に把持する把持部９が形成されている。この把持部９は、内針ハブ４１の先端部外周面からカテーテル２（外針２１）方向に延設され、前記把持部９の先端部は、外筒６（アーム開閉部６２）の先端部と対応する位置に形成されている。 In the fifth embodiment, as shown in FIGS. 22 and 23, a grip portion 9 that grips in parallel with the central axis of the inner needle hub 41 is formed on the outer peripheral surface of the distal end portion of the cylindrical inner needle hub 41. Has been. The grip portion 9 extends from the outer peripheral surface of the distal end portion of the inner needle hub 41 toward the catheter 2 (outer needle 21), and the distal end portion of the grip portion 9 is the distal end portion of the outer cylinder 6 (arm opening / closing portion 62). And corresponding positions.
また、内針ハブ４１にプロテクタ５を装着した際、前記把持部９とプロテクタ５の衝突を避けるため、前記プロテクタ５には開口部５Ｇが設けられている。この開口部５Ｇは、内針ハブ４１の挿入端側（外針ハブ係止部５Ｅと反対端部側）から外針ハブ係止部５Ｅ側に延設されている。
したがって、内針ハブ４１にプロテクタ５を装着する場合にも、把持部９に干渉することなく、内針ハブ４１にプロテクタ５を装着することができる。 Further, when the protector 5 is mounted on the inner needle hub 41, the protector 5 is provided with an opening 5G in order to avoid collision between the grip portion 9 and the protector 5. The opening 5G extends from the insertion end side (the end side opposite to the outer needle hub locking portion 5E) of the inner needle hub 41 to the outer needle hub locking portion 5E side.
Therefore, even when the protector 5 is attached to the inner needle hub 41, the protector 5 can be attached to the inner needle hub 41 without interfering with the grip portion 9.
このように構成された、第５の実施形態にあっては、使用者は、前記把持部９を把持することにより、内針ハブ４１を持って穿刺動作を行う場合に比べて、より内針３（外針２１）に近いところを持って穿刺動作を行うことができ、より適切な穿刺を行うことができる。 In the fifth embodiment configured as described above, the user can grasp the grip portion 9 and thereby perform the inner needle more than when performing the puncturing operation with the inner needle hub 41. 3 (outer needle 21) can be held close to the puncturing operation, and more appropriate puncturing can be performed.
（第６の実施形態）
第６の実施形態について、図２４乃至図３５に基づいて説明する。尚、第1～第５の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。 (Sixth embodiment)
A sixth embodiment will be described with reference to FIGS. Note that members similar to those in the first to fifth embodiments are given the same reference numerals, and detailed descriptions thereof are omitted.
ところで、従来の穿刺具においては、患者の身体１１０に外針１０２ａを穿刺する際、外針１０２ａの先端から内針１０３の先端１０３ａが突出した状態となっている必要がある。そのため、穿刺具の使用前にあっては、内針１０３と外針１０２ａとの軸方向の位置がずれないように、また安全面からキャップ状のプロテクタを外針１０２ａおよび内針１０３に被せて保護したいという要求があった。 By the way, in the conventional puncture device, when the outer needle 102a is punctured into the patient's body 110, it is necessary that the tip 103a of the inner needle 103 protrudes from the tip of the outer needle 102a. Therefore, before using the puncture device, a cap-shaped protector is put on the outer needle 102a and the inner needle 103 so that the axial positions of the inner needle 103 and the outer needle 102a do not deviate. There was a request to protect.
　しかしながら、図２４に示すように外針ハブ１０２ｂの側面に翼１０６が設けられた穿刺具にあっては、前記プロテクタを被せる場合に、前記翼１０６が障害となる。即ち、外針ハブ１０２ｂの全体を前記プロテクタで覆うことができないという課題があった。また、翼１０６を収容可能なプロテクタを形成すると、非常に大型なプロテクタになるという課題があった。 However, as shown in FIG. 24, in the puncture device in which the wing 106 is provided on the side surface of the outer needle hub 102b, the wing 106 becomes an obstacle when the protector is put on. That is, there is a problem that the entire outer needle hub 102b cannot be covered with the protector. Moreover, when the protector which can accommodate the wing | blade 106 was formed, the subject that it became a very large protector occurred.
　この実施形態は、この課題を解決するためになされたものであり、外針を保持する外針ハブに翼が設けられている場合にも、外針ハブを覆うためのプロテクタを大型化することなく確実に装着し、前記外針及び該外針から突出した内針を保護し、それらの位置ずれを防止すると共に安全面を確保できる点に特徴がある。 This embodiment is made in order to solve this problem. Even when the outer needle hub for holding the outer needle is provided with a wing, the protector for covering the outer needle hub is enlarged. The outer needle and the inner needle protruding from the outer needle can be protected, the positional deviation can be prevented, and a safety aspect can be secured.
　以下、第６実施形態にかかる穿刺具について説明する。
　穿刺具１は、図２５～図２７に示すように、カテーテル２と、前記カテーテル２に先端部が挿入される内針３と、前記内針３の一端部（基端部）を保持する筒状の注射具４と、前記カテーテル２および前記内針３の先端を覆うプロテクタ５とを備えている。また、前記穿刺具１において、前記内針３を除く全ての部品は樹脂製である。 Hereinafter, the puncture device according to the sixth embodiment will be described.
As shown in FIGS. 25 to 27, the puncture device 1 includes a catheter 2, an inner needle 3 into which the distal end is inserted into the catheter 2, and a cylinder that holds one end (base end) of the inner needle 3. And a protector 5 that covers the distal ends of the catheter 2 and the inner needle 3. Moreover, in the puncture device 1, all parts except the inner needle 3 are made of resin.
　前記カテーテル２は、図２７、図２８に示すように可撓性を有する中空の管からなる外針２１と、外針２１の基端部を保持する外針ハブ２２とを有する。前記外針ハブ２２には、その左右両側に延設された一対の翼２２Ａ（突起部位）が一体形成されている。前記一対の翼２２Ａは、これを粘着テープ等により患者の皮膚に固定し、カテーテル２のずれを防止するために用いられる。 27 and 28, the catheter 2 has an outer needle 21 formed of a flexible hollow tube and an outer needle hub 22 that holds the proximal end portion of the outer needle 21. The outer needle hub 22 is integrally formed with a pair of wings 22 </ b> A (projection parts) extending on both the left and right sides thereof. The pair of wings 22 </ b> A is used for fixing the wing 22 </ b> A to the patient's skin with an adhesive tape or the like and preventing the catheter 2 from being displaced.
　前記内針ハブ４１は略円筒状に形成され、前記内針ハブ４１の先端側には、図２８～図３１に示すように、本体部４１ａの筒径よりも拡径された筒状の嵌合部４１ｂが形成されている。この嵌合部４１ｂはプロテクタ５と嵌合するように構成されている。
　また、内針ハブ４１後端部には、尾栓４２が嵌合する開口部４１ｃが設けられ、筒状の嵌合部４１ｂの本体部４１ａ側には、前記外筒６の軸部６４が挿通する貫通孔４１ｄが設けられている。そして、内針ハブ４１の本体部４１ａ及び嵌合部４１ｂ内に、前記外筒６が収容されるように構成されている。 The inner needle hub 41 is formed in a substantially cylindrical shape, and, as shown in FIGS. 28 to 31, a cylindrical fitting that is larger in diameter than the cylindrical diameter of the main body 41a is formed on the distal end side of the inner needle hub 41. A joint portion 41b is formed. The fitting portion 41 b is configured to be fitted with the protector 5.
An opening 41c into which the tail plug 42 is fitted is provided at the rear end portion of the inner needle hub 41, and the shaft portion 64 of the outer cylinder 6 is provided on the main body 41a side of the cylindrical fitting portion 41b. A through hole 41d to be inserted is provided. The outer cylinder 6 is configured to be accommodated in the main body portion 41 a and the fitting portion 41 b of the inner needle hub 41.
　この嵌合部４１ｂの外周面の先端部には、周方向に円弧状（先端側から見て円弧状）の複数のリブ状突起４１ｅが形成されている（図では４個のリブ状突起が図示されている）。このリブ状突起４１ｅは、プロテクタ５に形成された被係止突起５ｅ（図３３参照）を係止することにより、前記注射具４にプロテクタ５を装着（固定する）するものである。 A plurality of rib-shaped protrusions 41e having an arc shape (arc shape when viewed from the tip side) in the circumferential direction are formed at the distal end portion of the outer peripheral surface of the fitting portion 41b (in the figure, four rib-shaped projections are formed). Is shown). The rib-like protrusion 41e is for attaching (fixing) the protector 5 to the injection device 4 by engaging the locked protrusion 5e (see FIG. 33) formed on the protector 5.
　また、前記リブ状突起４１ｅのうち隣接するリブ状突起４１ｅは、図３０に示すように所定の間隔ｔをあけて形成されている。
　即ち、４個のリブ状突起４１ｅは、２個のリブ状突起４１ｅを一対として、内針ハブ４１の先端側から見て左右対称に配置されている。そして、左右対称に配置されたリブ状突起４１ｅ間の間隔ｔは、プロテクタ５に形成された被ガイド部５ｈ，５ｉ（図３３参照）が挿通するように、所定寸法に形成されている。 Further, adjacent rib-shaped protrusions 41e among the rib-shaped protrusions 41e are formed at a predetermined interval t as shown in FIG.
That is, the four rib-like protrusions 41e are arranged symmetrically as viewed from the front end side of the inner needle hub 41 with the two rib-like protrusions 41e as a pair. And the space | interval t between the rib-shaped protrusion 41e arrange | positioned left-right symmetrically is formed in the predetermined dimension so that the to- be-guided parts 5h and 5i (refer FIG. 33) formed in the protector 5 may penetrate.
　更に、前記嵌合部４１ｂの外周面に形成されたリブ状突起４１ｅの後方（リブ状突起４１ｅより内針基端部側）には、内針ハブ４１の軸線に沿って該軸線と平行に延設された押え突起４１ｆｃが設けられている。
　この押え突起４１ｆの下面４１ｆ１は、図３０に示すように、左右対称に配置された一対のリブ状突起４１ｅのうち、上側のリブ状突起４１ｅの下面４１ｅ１の延長線上に配置されている。
　即ち、前記リブ状突起４１ｅと押え突起４１ｆにより、プロテクタ５に形成され被ガイド突起５ｈ，５ｉを確実に保持するように構成されている。 Further, on the rear side of the rib-shaped protrusion 41e formed on the outer peripheral surface of the fitting portion 41b (on the inner needle proximal end side from the rib-shaped protrusion 41e), it is parallel to the axis along the axis of the inner needle hub 41. An extended presser protrusion 41fc is provided.
As shown in FIG. 30, the lower surface 41f1 of the presser protrusion 41f is disposed on an extension line of the lower surface 41e1 of the upper rib-shaped protrusion 41e among the pair of rib-shaped protrusions 41e disposed symmetrically.
That is, the rib-like protrusion 41e and the pressing protrusion 41f are configured to securely hold the guided protrusions 5h and 5i formed on the protector 5.
　また、前記プロテクタ５は、図３２乃至図３４に示すように、前記外針２１を収容する円筒状の外針ハブ係止部５ａと、前記外針ハブ係止部５ａから軸線方向に延設されてプロテクタの上面及び側面を形成すると共に、前記外針ハブ係止部反対端部及び下面に開口部５ｃ１，５ｃ２を有する本体部５ｂを備えている。 Further, as shown in FIGS. 32 to 34, the protector 5 includes a cylindrical outer needle hub locking portion 5a for accommodating the outer needle 21, and an axial direction extending from the outer needle hub locking portion 5a. The main body 5b having openings 5c1 and 5c2 on the opposite end and the lower surface of the outer needle hub locking portion is formed.
　前記外針ハブ係止部５ａは、プロテクタ５の先端部の内周面に円筒状に突出して形成され、この内部の空間５ａ１内に前記内針３の先端が位置すると共に、前記外針ハブ係止部５ａの端部５ａ２が外針ハブ２２に当接するように構成されている。 The outer needle hub locking portion 5a is formed in a cylindrical shape on the inner peripheral surface of the distal end portion of the protector 5, and the distal end of the inner needle 3 is located in the inner space 5a1, and the outer needle hub The end portion 5 a 2 of the locking portion 5 a is configured to contact the outer needle hub 22.
　前記開口部５ｃ１は、プロテクタ５を内針ハブ４１の嵌合部４１ｂを挿入するための開口部であり、前記開口部５ｃ２はプロテクタ５を装着した際、外針ハブ２２に設けられた翼２２Ａと干渉しないために設けられている。 The opening 5c1 is an opening for inserting the protector 5 into the fitting portion 41b of the inner needle hub 41. The opening 5c2 is a blade 22A provided on the outer needle hub 22 when the protector 5 is mounted. It is provided to prevent interference.
　また、前記本体部外周面における外針ハブ係止部５ａの反対端部側には、前記本体部５ｂの左右両側に延設された、円弧状（円筒部５ａ側から見て）のリブ状フレーム５ｄが形成されている。またリブ状フレーム５ｄは、前記本体部５ｂの左右両側から外針ハブ係止部５ａに向かう延設部５ｄ１が設けられている。
　また、前記円弧状のリブ状フレーム５ｄは、使用者が指を掛けてプロテクタ５を取り外せるように、所定の高さｈ（寸法）を有している。
　尚、前記リブ状フレーム５ｄ及びリブ状フレーム５ｄの延設部５ｄ１が、本体部５ｂに設けられることにより、開口部５ｃ１，５ｃ２が形成されたプロテクタ５の機械的強度を増大させることができ、プロテクタ５の変形を抑制することができる。 Further, on the outer peripheral surface of the main body portion on the opposite end side of the outer needle hub locking portion 5a, an arc-shaped (as viewed from the cylindrical portion 5a side) rib shape extending on both the left and right sides of the main body portion 5b. A frame 5d is formed. The rib-like frame 5d is provided with an extending portion 5d1 extending from the left and right sides of the main body portion 5b toward the outer needle hub locking portion 5a.
Further, the arc-shaped rib-shaped frame 5d has a predetermined height h (dimension) so that the user can remove the protector 5 by placing his / her finger.
The rib-shaped frame 5d and the extending portion 5d1 of the rib-shaped frame 5d are provided in the main body 5b, whereby the mechanical strength of the protector 5 in which the openings 5c1 and 5c2 are formed can be increased. Deformation of the protector 5 can be suppressed.
　また、プロテクタ５の内周面には、その周方向に被係止突起５ｅが形成されている。
前記内針ハブ４１にプロテクタ５装着する際、前記嵌合部４１ｂ外周面に形成されたリブ状突起４１ｅを前記係止突起５ｅが乗り越えることによって、プロテクタ５の係止突起５ｅがリブ状突起４１ｅに係止され、プロテクタ５は内針ハブ４１（嵌合部４１ａ）に固定される。 Further, on the inner peripheral surface of the protector 5, a locked projection 5 e is formed in the circumferential direction.
When the protector 5 is attached to the inner needle hub 41, the locking projection 5e of the protector 5 moves over the rib-shaped projection 41e formed on the outer peripheral surface of the fitting portion 41b, so that the locking projection 5e of the protector 5 becomes the rib-shaped projection 41e. The protector 5 is fixed to the inner needle hub 41 (fitting portion 41a).
　また、プロテクタ５の内周面には、その内針ハブ４１の嵌合部４１ｂの外周面と圧接する接触部５ｆ，５ｇが設けられている。
この接触部５ｆ，５ｇは、第２の実施形態で示した接触部５Ａ～５Ｄと同様な構成を有している。具体的には、この接触部５ｆ，５ｇは、プロテクタ５の内周面に突出すると共に、プロテクタ５の軸線に沿って、前記軸線と平行に延設されている。前記接触部５ｆ，５ｇは、複数形成されていれば良く、前記嵌合部４１ｂの外周面と接触部５ｆ，５ｇとの圧接力は、前記嵌合部４１ｂの外周面と接触部５ｆ，５ｇとの摺動抵抗（引抜き力）を考慮して、接触部の幅、長さ、個数等が設定される。 Further, contact portions 5 f and 5 g that are in pressure contact with the outer peripheral surface of the fitting portion 41 b of the inner needle hub 41 are provided on the inner peripheral surface of the protector 5.
The contact portions 5f and 5g have the same configuration as the contact portions 5A to 5D shown in the second embodiment. Specifically, the contact portions 5 f and 5 g protrude from the inner peripheral surface of the protector 5 and extend along the axis of the protector 5 in parallel with the axis. The contact portions 5f and 5g only need to be formed in plural, and the pressure contact force between the outer peripheral surface of the fitting portion 41b and the contact portions 5f and 5g is equal to the outer peripheral surface of the fitting portion 41b and the contact portions 5f and 5g. In consideration of the sliding resistance (pull-out force), the width, length, number, etc. of the contact portions are set.
　ところで、適切な前記摺動抵抗（引抜き力）が設定されていない場合、例えば、内針ハブ４１の嵌合部４１ｂの外周面が本体部５ｂの内周面全体と接し、前記摺動抵抗が大きい場合には、使用者が力を入れてプロテクタを取り外した瞬間、力あまって、自己又は他人に対して内針を刺してしまう虞があり、一方、前記摺動抵抗（引抜き力）が小さいときには、プロテクタ５が内針ハブ４１の嵌合部４１ｂから脱落する虞がある。
　上記したようにプロテクタ５の内周面に接触部５ｆ，５ｇを設け、接触部の幅、長さ、個数等を適宜設定することにより、適切な前記摺動抵抗力（引抜き力）を得ることができ、安全性を確保することができる。 By the way, when the appropriate sliding resistance (pulling force) is not set, for example, the outer peripheral surface of the fitting portion 41b of the inner needle hub 41 is in contact with the entire inner peripheral surface of the main body portion 5b, and the sliding resistance is If it is large, the moment the user applies force and removes the protector, there is a risk that the force will be applied and the inner needle may be stabbed against itself or another person, while the sliding resistance (pull-out force) is small. Sometimes, the protector 5 may fall off from the fitting portion 41b of the inner needle hub 41.
As described above, by providing the contact portions 5f and 5g on the inner peripheral surface of the protector 5 and appropriately setting the width, length, number, etc. of the contact portions, an appropriate sliding resistance force (drawing force) can be obtained. And safety can be ensured.
　また、プロテクタ５の内周面には、前記接触部５ｆ，５ｇと平行（本体部５の軸線に沿って前記軸線に平行）に、プロテクタ５の内周面から突出したリブ状の突起である被ガイド部５ｈ，５ｉが設けられている。
　この被ガイド部５ｈ，５ｉは、プロテクタ５を装着する際には、前記一対のリブ状突起４１ｅの間を挿通し、前記リブ状突起４１ｅに案内される。そのため、被ガイド部５ｈ，５ｉの厚さ寸法は、一対のリブ状突起４１ｅの間隔ｔよりも小さく形成されている。 Further, the inner peripheral surface of the protector 5 is a rib-like protrusion protruding from the inner peripheral surface of the protector 5 in parallel with the contact portions 5f and 5g (parallel to the axis along the axis of the main body 5). Guided portions 5h and 5i are provided.
When the protector 5 is mounted, the guided portions 5h and 5i are inserted between the pair of rib-shaped protrusions 41e and guided to the rib-shaped protrusion 41e. Therefore, the thickness dimensions of the guided portions 5h and 5i are formed to be smaller than the interval t between the pair of rib-like protrusions 41e.
　そして、一対のリブ状突起４１ｅの間を挿通し、案内された被ガイド部５ｈ，５ｉの上面は、前記内針ハブ４１の嵌合部４１ｂに設けられた押え突起４１ｆの下面と接する（図３１参照）。
　このように、前記被ガイド部５ｈ，５ｉが、一対のリブ状突起４１ｅおよび押え突起４１ｆによって、保持されるため、プロテクタ５のガタつきを防止することができる。 The upper surfaces of the guided portions 5h and 5i inserted through the pair of rib-like projections 41e are in contact with the lower surface of the presser projection 41f provided on the fitting portion 41b of the inner needle hub 41 (see FIG. 31).
As described above, the guided portions 5h and 5i are held by the pair of rib-like protrusions 41e and the pressing protrusions 41f, so that the protector 5 can be prevented from rattling.
　特に、プロテクタ５の下面の開口部５ｃ２側は機械的な強度が弱いため、プロテクタ５を内針ハブ４１の嵌合部４１ｂに装着した際、プロテクタ５が開口部５ｃ２側への傾く（変形する）虞がある。
　この押え突起４１ｆによって、前記被ガイド部５ｈ，５ｉを押えることにより、プロテクタ５開口部側への傾き（変形）を抑制することができる。 In particular, since the mechanical strength of the opening 5c2 side on the lower surface of the protector 5 is weak, when the protector 5 is attached to the fitting portion 41b of the inner needle hub 41, the protector 5 is inclined (deformed) toward the opening 5c2 side. There is a risk.
By pressing the guided portions 5h and 5i with the pressing protrusion 41f, the inclination (deformation) toward the opening of the protector 5 can be suppressed.
　このようなプロテクタ５を装着する際には、図３５に示すように、プロテクタ５の下面側の開口部５ｃ２に一対の翼２２Ａが配置された状態とし、プロテクタ５をＸ方向（注射具４側）に移動させ、被ガイド部５ｅ，５ｆを前記一対のリブ状突起４１ｅの間を挿通させると、被ガイド部５ｈ，５ｉは、リブ状突起４１ｅに案内されながらに移動する。また接触部５ｆ、５ｇは、内針ハブ４１の嵌合部４１ｂの外周面に圧接しながら移動する。
　そして、プロテクタ５の被係止突起５ｅが、内針ハブ４１の嵌合部４１ｂ外周面に形成されたリブ状突起４１ｅを乗り越えることによって、プロテクタ５の被係止突起５ｇがリブ状突起４１ｅに係止され、プロテクタ５は内針ハブ４１（嵌合部４１ａ）に固定される。 When such a protector 5 is mounted, as shown in FIG. 35, the pair of wings 22A are arranged in the opening 5c2 on the lower surface side of the protector 5, and the protector 5 is placed in the X direction (on the injection tool 4 side). ) And the guided portions 5e and 5f are inserted between the pair of rib-like projections 41e, and the guided portions 5h and 5i are moved while being guided by the rib-like projections 41e. The contact portions 5f and 5g move while being pressed against the outer peripheral surface of the fitting portion 41b of the inner needle hub 41.
Then, the locked protrusion 5e of the protector 5 moves over the rib-shaped protrusion 41e formed on the outer peripheral surface of the fitting portion 41b of the inner needle hub 41, whereby the locked protrusion 5g of the protector 5 becomes the rib-shaped protrusion 41e. Locked, the protector 5 is fixed to the inner needle hub 41 (fitting portion 41a).
　このとき、一対のリブ状突起４１ｅの間を挿通した被ガイド部５ｈ，５ｉの上面は、前記内針ハブ４１の嵌合部４１ｂに設けられた押え突起４１ｆの下面と接し、前記被ガイド部５ｈ，５ｉが、一対のリブ状突起４１ｅおよび押え突起４１ｆによって、保持される。
　また、プロテクタ５に形成された外針ハブ係止部５ａの空間部５ａ１内に前記内針３の先端が位置すると共に、前記外針ハブ係止部５ａの先端部５ａ２が外針ハブ２２に当接する。これによりプロテクタ５が内針ハブ４１に対し安定して装着（嵌合）された状態となる。 At this time, the upper surfaces of the guided portions 5h and 5i inserted between the pair of rib-like projections 41e are in contact with the lower surface of the presser protrusion 41f provided on the fitting portion 41b of the inner needle hub 41, and the guided portions 5h and 5i are held by the pair of rib-like protrusions 41e and the pressing protrusion 41f.
Further, the distal end of the inner needle 3 is positioned in the space 5 a 1 of the outer needle hub locking portion 5 a formed in the protector 5, and the distal end portion 5 a 2 of the outer needle hub locking portion 5 a is connected to the outer needle hub 22. Abut. As a result, the protector 5 is stably attached (fitted) to the inner needle hub 41.
　そして、このようにしてプロテクタが装着された状態にあっては、外針ハブ２２（カテーテル２）の前方への移動は外針ハブ係止部５ａによって阻止され、外針ハブ２２（カテーテル２）の後方への移動はプロテクタ５に固定された内針ハブ４１（嵌合部４１ｂ）によって阻止される。
　その結果、カテーテル２は固定された状態になされ、カテーテル２の移動は阻止される。また、外針ハブ２２に翼２２Ａが設けられている場合にも、プロテクタ５を大型化することなく確実に装着することができ、また前記外針ハブ係止部５ａの空間部５ａ１により外針２１及び該外針２１の先端から突出した内針３を収容して保護することができる。 When the protector is thus mounted, the forward movement of the outer needle hub 22 (catheter 2) is blocked by the outer needle hub locking portion 5a, and the outer needle hub 22 (catheter 2). Is prevented by the inner needle hub 41 (fitting portion 41 b) fixed to the protector 5.
As a result, the catheter 2 is fixed and movement of the catheter 2 is prevented. Even when the outer needle hub 22 is provided with wings 22A, the protector 5 can be securely mounted without increasing the size, and the outer needle is secured by the space portion 5a1 of the outer needle hub locking portion 5a. 21 and the inner needle 3 protruding from the tip of the outer needle 21 can be accommodated and protected.
　また、前記プロテクタ５を取り外す際（図２９のＹ方向にプロテクタ５を移動させる際）、使用者はリブ状フレーム５ｄに指をかけ、片手で容易にプロテクタ５を取り外すことができる。尚、前記接触部５ｆ，５ｇは、嵌合部４１bと接し、外筒６のアーム開閉部６２と接しないため、プロテクタ５が移動しても、外筒６のアーム開閉部６２がＹ方向に移動することはなく、その位置に留まる。
　その結果、前記プロテクタ５を取り外した場合においても、内針３に対して外針ハブ２２（カテーテル２）は移動しないため、外針２１が内針３の先端よりも前方に移動し、内針３の先端を覆う等の弊害を防止することができる。 Further, when removing the protector 5 (when moving the protector 5 in the Y direction in FIG. 29), the user can easily remove the protector 5 with one hand by placing a finger on the rib-shaped frame 5d. The contact portions 5f and 5g are in contact with the fitting portion 41b and not the arm opening / closing portion 62 of the outer cylinder 6. Therefore, even if the protector 5 moves, the arm opening / closing portion 62 of the outer cylinder 6 moves in the Y direction. It does not move and stays in that position.
As a result, even when the protector 5 is removed, the outer needle hub 22 (catheter 2) does not move relative to the inner needle 3, so the outer needle 21 moves forward from the tip of the inner needle 3, and the inner needle It is possible to prevent adverse effects such as covering the tip of 3.
以上説明したように、本実施形態にかかる穿刺具１は、外針２１と、前記外針の基端部を保持すると共に、側面に突起部位を有する外針ハブ２２と、前記外針に先端部が挿入される内針３と、前記内針の基端部を保持する筒状の内針ハブ４１と、前記外針を覆うプロテクタ５とを備える穿刺具１であって、前記プロテクタ５は、前記外針を収容する外針ハブ係止部５ａと、前記外針ハブ係止部５ａから軸線方向に延設されてプロテクタの上面及び側面を形成すると共に、下面及び前記外針ハブ係止部の反対端部に開口部５ｃ１，５ｃ２を有する本体部５ｂと、前記本体部の外針ハブ係止部反対端部側の外周面に形成されたリブ状フレーム５ｄと、前記本体部の外針ハブ係止部反対端部の内周面に形成された被係止突起５ｅとを有し、前記内針ハブ４１は、一端側の外周面に形成された前記被係止突起５ｅを係止するリブ状突起４１ｅとを有し、前記プロテクタの下面の開口部に前記外針ハブ２２の突起部位２２Ａが配置され、前記プロテクタ５の外針ハブ係止部反対端部側の開口部５ｃ１から内針ハブ４１の一端側を挿入することにより、前記本体部５ｂの被係止突起５ｅが前記内針ハブ４１のリブ状突起４１ｅに係止され、前記外針２１が前記外針ハブ係止部５ａの空間部５ａ１に収容されることを特徴としている。 As described above, the puncture device 1 according to the present embodiment has the outer needle 21, the outer needle hub 22 having the protruding portion on the side surface while holding the proximal end portion of the outer needle, and the distal end of the outer needle. The puncture device 1 includes an inner needle 3 into which a portion is inserted, a cylindrical inner needle hub 41 that holds a proximal end portion of the inner needle, and a protector 5 that covers the outer needle. An outer needle hub locking portion 5a for housing the outer needle, and an upper surface and a side surface of the protector that extend in the axial direction from the outer needle hub locking portion 5a, and a lower surface and the outer needle hub locking A main body part 5b having openings 5c1 and 5c2 at the opposite end of the part, a rib-like frame 5d formed on the outer peripheral surface of the main body part opposite to the outer needle hub locking part, A hooked protrusion 5e formed on the inner peripheral surface of the end opposite to the needle hub locking portion, and the inner needle The rib 41 has a rib-like protrusion 41e that locks the locked protrusion 5e formed on the outer peripheral surface on one end side, and the protruding portion 22A of the outer needle hub 22 is formed in the opening on the lower surface of the protector. When the one end side of the inner needle hub 41 is inserted from the opening 5c1 on the opposite end side of the protector 5 to the outer needle hub locking portion, the locked protrusion 5e of the main body portion 5b is inserted into the inner needle hub. 41, and the outer needle 21 is received in the space 5a1 of the outer needle hub locking portion 5a.
　このような構成によれば、前記プロテクタ５の本体部５ｂ下面には、開口部５ｃ２が設けられるため、前記開口部５ｃ２に突起部位（図２４に示した翼１０６など）を配置することができ、プロテクタ５を前記突起部位２２Ａに干渉させずに内針ハブに嵌合させることができる。
　即ち、外針ハブ２２に翼などの突起部位２２Ａが設けられている場合にも、プロテクタ５を大型化することなく確実に装着することができ、前記外針ハブ係止部５ａにより外針及び該外針の先端から突出した内針を収容して保護し、それらの位置ずれを防止すると共に、安全面を確保することができる。
　尚、前記本体部５ｂにリブ状フレーム５ｄが形成されているため、下面及び前記外針ハブ係止部の反対端部側に開口部５ｃ１，５ｃ２を有する本体部５ｂの強度を増大させることができ、プロテクタ５の変形を抑制することができる。 According to such a configuration, since the opening 5c2 is provided on the lower surface of the main body 5b of the protector 5, a projecting portion (such as the wing 106 shown in FIG. 24) can be disposed in the opening 5c2. The protector 5 can be fitted to the inner needle hub without interfering with the protruding portion 22A.
That is, even when the outer needle hub 22 is provided with a protruding portion 22A such as a wing, the protector 5 can be securely mounted without increasing the size, and the outer needle hub locking portion 5a can The inner needle protruding from the tip of the outer needle can be accommodated and protected to prevent positional displacement thereof, and a safety aspect can be ensured.
In addition, since the rib-like frame 5d is formed on the main body part 5b, the strength of the main body part 5b having the openings 5c1 and 5c2 on the lower surface and the opposite end side of the outer needle hub locking part can be increased. The deformation of the protector 5 can be suppressed.
　ここで、前記リブ状フレーム５ｄの本体部外周面からの高さが、使用者の指がかかる寸法に形成されていることが望ましい。このようにリブ状フレームが形成されている場合には、使用者は片手で、リブ状フレーム５ｄに指をかけてプロテクタ５を内針ハブ４１から容易に取り外すことができる。 Here, it is desirable that the height of the rib-like frame 5d from the outer peripheral surface of the main body is formed such that the user's finger can be taken. When the rib-shaped frame is formed in this way, the user can easily remove the protector 5 from the inner needle hub 41 with one hand by placing a finger on the rib-shaped frame 5d.
　また、前記プロテクタ５は、本体部５ｂの内周面から突出して、前記外針ハブ係止部５ａの反対端部の開口部から本体部５ｂの軸線に沿って前記軸線と平行に延設された接触部５ｆ，５ｇを有し、前記プロテクタ５の外針ハブ係止部反対端部側の開口部５ｃ１から内針ハブ４１（嵌合部４１ｂ）の一端側を挿入した際、前記接触部５ｆ，５ｇが内針ハブ４１（嵌合部４１ｂ）の外周面に圧接することが望ましい。
　このように、内針ハブ４１（嵌合部４１ｂ）の外周面は、プロテクタ５の本体部５ｂの内周面全体と圧接するのではなく、前記接触部５ｆ、５ｇと圧接するため、適度な摺動抵抗が得られ、プロテクタ５の装着、取り外す際の事故を抑制することができる。 The protector 5 protrudes from the inner peripheral surface of the main body 5b and extends in parallel with the axis along the axis of the main body 5b from the opening at the opposite end of the outer needle hub locking portion 5a. When the one end side of the inner needle hub 41 (fitting portion 41b) is inserted from the opening 5c1 on the opposite end side of the outer needle hub locking portion of the protector 5, the contact portion 5f, 5g 5f and 5g are preferably in pressure contact with the outer peripheral surface of the inner needle hub 41 (fitting portion 41b).
Thus, the outer peripheral surface of the inner needle hub 41 (fitting portion 41b) is not in pressure contact with the entire inner peripheral surface of the main body portion 5b of the protector 5, but is in pressure contact with the contact portions 5f and 5g. Sliding resistance is obtained, and accidents when the protector 5 is attached or removed can be suppressed.
　また、前記プロテクタ５は、本体部５ｂの内周面から突出して、前記外針ハブ係止部反対端部側の開口部５ｃ１から本体部５ｂの軸線に沿って前記軸線と平行に延設された被ガイド部５ｈ、５ｉを有し、前記リブ状突起４１ｅは、所定の間隔をあけて形成され、前記プロテクタ５の外針ハブ係止部反対端部側の開口部５ｃ１から内針ハブ４１（嵌合部４１ｂ）の一端側を挿入する際、前記被ガイド部５ｈ、５ｉが前記リブ状突起４１ｅ間を挿通し、前記リブ状突起４１ｅに案内されることが望ましい。
　このように、プロテクタ５を内針ハブ４１に装着する際に、プロテクタ５はガイドされ、内針ハブ４１とプロテクタ５とを確実に嵌合させることができる。 The protector 5 protrudes from the inner peripheral surface of the main body 5b and extends in parallel with the axis along the axis of the main body 5b from the opening 5c1 on the opposite end side of the outer needle hub locking portion. The rib-like protrusions 41e are formed at predetermined intervals, and the inner needle hub 41 extends from the opening 5c1 on the opposite end side of the protector 5 to the outer needle hub locking portion. When the one end side of the (fitting portion 41b) is inserted, it is desirable that the guided portions 5h and 5i are inserted between the rib-like projections 41e and guided to the rib-like projections 41e.
Thus, when the protector 5 is attached to the inner needle hub 41, the protector 5 is guided, and the inner needle hub 41 and the protector 5 can be reliably fitted.
　前記リブ状突起４１ｅより内針基端部側の内針ハブの外周面に、前記被ガイド部が接する押え突起４１ｆが形成されていることが望ましい。
　このように、前記被ガイド部５ｈ、５ｉが押え突起４１ｆと接することにより、プロテクタ５の内針ハブ４１に対するガタつきを防止することができる。特に、プロテクタ５を内針ハブ４１に装着した際、プロテクタ５の下面開口部側への傾き（変形）を抑制することができる。 It is desirable that a presser protrusion 41f that is in contact with the guided portion is formed on the outer peripheral surface of the inner needle hub closer to the inner needle proximal end than the rib-shaped protrusion 41e.
As described above, when the guided portions 5h and 5i are in contact with the presser protrusion 41f, it is possible to prevent the protector 5 from rattling with respect to the inner needle hub 41. In particular, when the protector 5 is attached to the inner needle hub 41, the inclination (deformation) of the protector 5 toward the lower surface opening can be suppressed.
（第７の実施形態）
第７の実施形態について、図３６乃至図４３に基づいて説明する。尚、第1～第６の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。この第７の実施形態は、第６の実施形態に示したプロテクタを改良したものである。 (Seventh embodiment)
A seventh embodiment will be described with reference to FIGS. Note that members similar to those in the first to sixth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. In the seventh embodiment, the protector shown in the sixth embodiment is improved.
　ところで、外針ハブ１０２ｂには、図２４に示すような翼１０６が設けられているもののほか、図３６に示すように外針ハブ１０２ｂの側面に分岐管１０５が設けられているものがある。このような前記プロテクタを被せる場合に、前記突起した分岐管１０５や翼１０６が障害となる。即ち、外針ハブ１０２ｂの全体を前記プロテクタで覆うことができないという課題があった。また、分岐管１０５や翼１０６を収容可能なプロテクタを形成すると、非常に大型なプロテクタになるという課題があった。 Incidentally, in addition to the outer needle hub 102b provided with the wings 106 as shown in FIG. 24, there are those where the branch pipe 105 is provided on the side surface of the outer needle hub 102b as shown in FIG. When such a protector is put on, the protruding branch pipe 105 and wing 106 become an obstacle. That is, there is a problem that the entire outer needle hub 102b cannot be covered with the protector. Further, when a protector capable of accommodating the branch pipe 105 and the blade 106 is formed, there is a problem that the protector becomes a very large protector.
　本実施形態は、上記課題を解決するためになされたものであり、外針を保持する外針ハブに分岐管や翼が設けられている場合にも、外針ハブを覆うためのプロテクタを大型化することなく確実に装着し、前記外針及び該外針から突出した内針を保護し、それらの位置ずれを防止すると共に安全面を確保することができる穿刺具に特徴がある。 The present embodiment has been made to solve the above-described problems. Even when a branch pipe or a wing is provided on the outer needle hub that holds the outer needle, a protector for covering the outer needle hub is large-sized. There is a feature in the puncture device that can be securely attached without being changed, protect the outer needle and the inner needle protruding from the outer needle, prevent positional displacement thereof, and ensure a safety surface.
　以下、本発明の一実施形態にかかる穿刺具について、図３７乃至図４３に基づいて説明する。
　穿刺具１は、図３７～図３９に示すように、カテーテル２と、前記カテーテル２に先端部が挿入される内針３と、前記内針３の一端部（基端部）を保持する筒状の注射具４と、前記カテーテル２および前記内針３の先端を覆うプロテクタ５とを備えている。また、前記穿刺具１において、前記内針３を除く全ての部品は樹脂製である。 Hereinafter, a puncture device according to an embodiment of the present invention will be described with reference to FIGS. 37 to 43.
As shown in FIGS. 37 to 39, the puncture device 1 includes a catheter 2, an inner needle 3 into which a distal end portion is inserted into the catheter 2, and a cylinder that holds one end portion (base end portion) of the inner needle 3. And a protector 5 that covers the distal ends of the catheter 2 and the inner needle 3. Moreover, in the puncture device 1, all parts except the inner needle 3 are made of resin.
　前記カテーテル２は、図３９示すように可撓性を有する中空の管からなる外針２１と、外針２１の基端部を保持する外針ハブ２２とを有する。前記外針ハブ２２は、その側面に分岐管２２Ｂ（突起部位）が設けられている。また、外針ハブ２２には、その左右両側に延設された一対の翼２２Ａ（突起部位）が一体形成されている。前記分岐管２２Ｂは、例えば患者に対し薬液を投入するためのものであり、前記一対の翼２２Ａは、これを粘着テープ等により皮膚に固定し、カテーテル２のずれを防止するために用いられる。 39, the catheter 2 includes an outer needle 21 made of a flexible hollow tube and an outer needle hub 22 that holds a proximal end portion of the outer needle 21. As shown in FIG. The outer needle hub 22 is provided with a branch pipe 22B (projection site) on the side surface thereof. In addition, the outer needle hub 22 is integrally formed with a pair of wings 22A (projection portions) extending on the left and right sides thereof. The branch tube 22B is used, for example, to supply a drug solution to a patient, and the pair of wings 22A is used to fix the catheter to the skin with an adhesive tape or the like and prevent the catheter 2 from being displaced.
　前記注射具４は、図４０～図４２に示すように、筒状の内針ハブ４１と、前記内針ハブ４１の基端（紙面左端）に圧入によって取り付けられると共に、前記内針３の基端部が保持される略円筒状の針保持部４２ａを有する尾栓４２とを備えている。
また、前記内針ハブ４１の先端側の外周面には、本体の筒径よりも拡径された筒状の嵌合部４１ｂが形成されている。この嵌合部４１ｂの外周面には、周方向に沿って円環状にリブ状突起４１ｇが形成され、このリブ状突起４１ｇは内針ハブ４１をプロテクタ５とより確実に嵌合させるために設けられている。
　また、前記嵌合部４１ｂの内周面には、軸方向へ延伸されたリブ状突起である凸部４１ｈが形成されている。この凸部４１ｈは、内針ハブ４１とプロテクタ５とをより確実に嵌合させると共に、プロテクタ５の周方向の位置ずれを防止するために設けられている。 As shown in FIGS. 40 to 42, the injection device 4 is attached to a cylindrical inner needle hub 41 and a base end (left end of the paper surface) of the inner needle hub 41 by press fitting, and the base of the inner needle 3 And a tail plug 42 having a substantially cylindrical needle holding portion 42a for holding the end portion.
A cylindrical fitting portion 41b having a diameter larger than the cylinder diameter of the main body is formed on the outer peripheral surface on the distal end side of the inner needle hub 41. A rib-like protrusion 41g is formed in an annular shape along the circumferential direction on the outer peripheral surface of the fitting portion 41b, and the rib-like protrusion 41g is provided for fitting the inner needle hub 41 with the protector 5 more reliably. It has been.
A convex portion 41h, which is a rib-like protrusion extending in the axial direction, is formed on the inner peripheral surface of the fitting portion 41b. The convex portion 41h is provided to more reliably fit the inner needle hub 41 and the protector 5 and prevent the protector 5 from being displaced in the circumferential direction.
　また、プロテクタ５は、図４３に示すように、外針２１及び外針２１の先端から突出した内針３を収容可能な円筒状の外針係止部５１（図４１，図４２参照）と、この外針係止部５１の外側周面から拡径しながら軸方向に延びる一対の支持脚部５２とを有する。外針係止部５１は、プロテクタ５をカテーテル２に装着した際に、その後端が外針ハブ２２に形成された段差部２２Ｃに当接しカテーテル２を固定するようになっている。
　前記一対の支持脚部５２は、例えば、中空円錐体からなるキャップ形状の左右両側を軸方向に沿って切り欠くことで形成される。これにより、プロテクタ５の側面において、一対の支持脚部５２の間には開口部５３が形成される。
　また、前記支持脚部５２は、その先端に円筒部５１の同心円に沿って（嵌合部４１ａの周方向に沿って）湾曲形成された溝部５２ａが設けられ、溝部５２ａは所定の長さと幅を有している。また、溝部５２ａを形成する外側壁の内側面には、周方向に延びるリブ状突起５２ｂが形成され、このリブ状突起５２ｂが前記内針ハブ４１の有する嵌合部４１ｂのリブ状突起４１ｇを乗り越えて軸方向に重なることにより係止するようになっている。また、前記したように嵌合部４１ｂの内周面に、軸方向へ延伸された凸部４１ｈが形成されているため、前記嵌合部４１ｂが溝部５２ａに嵌入されると、前記凸部４１ｈが溝部５２ａの内側面に当接し、プロテクタ５の軸方向の位置ずれが防止されるようになっている。 Further, as shown in FIG. 43, the protector 5 includes a cylindrical outer needle locking portion 51 (see FIGS. 41 and 42) that can accommodate the outer needle 21 and the inner needle 3 protruding from the tip of the outer needle 21. And a pair of support legs 52 extending in the axial direction while expanding from the outer peripheral surface of the outer needle locking portion 51. When the protector 5 is attached to the catheter 2, the outer needle locking portion 51 comes into contact with the step portion 22 </ b> C formed on the outer needle hub 22 to fix the catheter 2.
The pair of support legs 52 are formed by, for example, notching the left and right sides of a cap shape made of a hollow cone along the axial direction. Thus, an opening 53 is formed between the pair of support legs 52 on the side surface of the protector 5.
The support leg 52 is provided with a groove 52a that is curved along the concentric circle of the cylindrical part 51 (along the circumferential direction of the fitting part 41a) at the tip thereof, and the groove 52a has a predetermined length and width. have. Further, a rib-like protrusion 52b extending in the circumferential direction is formed on the inner side surface of the outer wall forming the groove 52a, and this rib-like protrusion 52b forms a rib-like protrusion 41g of the fitting part 41b of the inner needle hub 41. It gets locked by getting over it and overlapping in the axial direction. Moreover, since the convex part 41h extended in the axial direction is formed in the inner peripheral surface of the fitting part 41b as described above, when the fitting part 41b is fitted into the groove part 52a, the convex part 41h. Is in contact with the inner surface of the groove 52a, and the axial displacement of the protector 5 is prevented.
　プロテクタ５を装着する際には、図４１に示すように一対の支持脚部５２の先端に設けられた溝部５２ａにそれぞれ内針ハブ４１の嵌合部４１ｂの一部を嵌入させ、溝部５２ａ内のリブ状突起５２ｂを嵌合部４１ｂのリブ状突起４１ｇに係止させる。これによりプロテクタ５が内針ハブ４１に対し安定して装着（嵌合）された状態となり、プロテクタ５の支持脚部５２に支持された外針係止部５１の内部空間に、外針２１及び該外針２１の先端から突出した内針３が収容される。 When the protector 5 is mounted, as shown in FIG. 41, a part of the fitting portion 41b of the inner needle hub 41 is fitted into the groove portion 52a provided at the tip of the pair of support leg portions 52, and the inside of the groove portion 52a. The rib-shaped protrusion 52b is engaged with the rib-shaped protrusion 41g of the fitting portion 41b. As a result, the protector 5 is stably attached (fitted) to the inner needle hub 41, and the outer needle 21 and the outer needle 21 and the inner needle 21 are supported by the support leg 52 of the protector 5. The inner needle 3 protruding from the tip of the outer needle 21 is accommodated.
　また、図３７、図３８に示すように、プロテクタ５の側面に設けられた上側の開口部５３に外針ハブ２２の分岐管２２Ｂが配置され、下側の開口部５３に一対の翼２２Ａが配置された状態となるため、支持脚部５２は前記分岐管２２Ｂと一対の翼２２Ａとに干渉することなく内針ハブ４１の嵌合部４１ｂに嵌合する。
　即ち、外針ハブ２２に分岐管２２Ｂや翼２２Ａが設けられている場合にも、プロテクタ５を大型化することなく確実に装着することができ、外針係止部５１により外針２１及び該外針２１の先端から突出した内針３を収容して保護することができる。 As shown in FIGS. 37 and 38, the branch pipe 22B of the outer needle hub 22 is disposed in the upper opening 53 provided on the side surface of the protector 5, and the pair of blades 22A is provided in the lower opening 53. Since it is in the disposed state, the support leg 52 is fitted into the fitting portion 41b of the inner needle hub 41 without interfering with the branch pipe 22B and the pair of blades 22A.
In other words, even when the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely mounted without increasing the size, and the outer needle 21 and the outer needle 21 and the The inner needle 3 protruding from the tip of the outer needle 21 can be accommodated and protected.
　以上のように本発明に係る第７の実施形態によれば、プロテクタ５の側面には、支持脚部５２の間に開口部５３が設けられるため、前記開口部５３に外針ハブ２２の分岐管２２Ｂと一対の翼２２Ａとを配置することができ、支持脚部５２を前記分岐管２２Ｂ及び翼２２Ａに干渉させずに内針ハブ４１に嵌合させることができる。
　即ち、外針ハブ２２に分岐管２２Ｂや翼２２Ａが設けられていても、プロテクタ５を大型化することなく確実に装着することができ、外針係止部５１により外針２１及び該外針２１の先端から突出した内針３を収容して保護し、それらの位置ずれを防止すると共に安全面を確保することができる。 As described above, according to the seventh embodiment of the present invention, since the opening 53 is provided between the support legs 52 on the side surface of the protector 5, the outer needle hub 22 branches to the opening 53. The tube 22B and the pair of blades 22A can be arranged, and the support leg 52 can be fitted to the inner needle hub 41 without interfering with the branch tube 22B and the blades 22A.
That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely mounted without increasing the size, and the outer needle 21 and the outer needle can be attached by the outer needle locking portion 51. The inner needle 3 protruding from the tip of 21 can be accommodated and protected to prevent positional displacement thereof and to ensure safety.
　また、前記実施形態においては、支持脚部５２の溝部５２ａの内側面に内方に突起するリブ状突起５２ｂが設けられ、嵌合部４１ｂの外側面に外方に突起するリブ状突起４１ｇが設けられ、それらが互いに係合するものとしたが、本発明にあってはそれに限定されるものではない。
　例えば、支持脚部５２の溝部５２ａの内側面に、周方向に沿って外方に突起するリブ状突起を設け、嵌合部４１ｂの内側面に、周方向に沿って内方に突起するリブ状突起を設け、それらが互いに係合するようにしてもよい。
　いずれの場合にも、支持脚部５２の溝部５２ａの側面と嵌合部４１ｂの内側面または外側面との間に、少なくとも２つのリブ状突起が介在することになり、それらを互いに係合させることによって、プロテクタ５を内針ハブ４１に強固に嵌合させることができる。
　或いは、支持脚部５２の溝部５２ａ、或いは嵌合部４１ｂの内側面または外側面のいずれか一方に周方向に延びるリブ状突起を設けてもよい。
　そのように構成しても、前記リブ状突起が、支持脚部５２の溝部５２ａの側面と嵌合部４１ｂの内側面または外側面との間に介在することになり、前記嵌合部４１ａを前記溝部５２に嵌入することができる。 In the embodiment, the rib-like protrusion 52b protruding inward is provided on the inner surface of the groove 52a of the support leg 52, and the rib-like protrusion 41g protruding outward is formed on the outer surface of the fitting part 41b. Although provided and engaged with each other, the present invention is not limited thereto.
For example, a rib-like protrusion that protrudes outward along the circumferential direction is provided on the inner surface of the groove 52a of the support leg 52, and a rib that protrudes inward along the circumferential direction is provided on the inner surface of the fitting part 41b. Protrusions may be provided so that they engage each other.
In any case, at least two rib-shaped protrusions are interposed between the side surface of the groove portion 52a of the support leg portion 52 and the inner surface or the outer surface of the fitting portion 41b, and they are engaged with each other. As a result, the protector 5 can be firmly fitted to the inner needle hub 41.
Or you may provide the rib-shaped protrusion extended in the circumferential direction in either the groove part 52a of the support leg part 52, or the inner surface or the outer surface of the fitting part 41b.
Even if it comprises in that way, the said rib-shaped protrusion will interpose between the side surface of the groove part 52a of the support leg part 52, and the inner surface or outer surface of the fitting part 41b, and the said fitting part 41a is inserted. It can be fitted into the groove 52.
　また、前記実施の形態においては、嵌合部４１ｂの内側面に、軸方向へ延伸された凸部４１ｈ（リブ状突起）が設けられ、この凸部４１ｈが溝部５２ａの内側面と嵌合部４１ａの内側面との間に介在するものとした。
　しかしながら、本発明にあっては、その構成に限定されるものではなく、軸方向に延びる凸部を、例えば、支持脚部５２の溝部５２ａの内側面に設け、それが溝部５２ａの内側面と嵌合部４１ｂの内側面または外側面との間に介在するようにしてもよい。
　或いは、軸方向に延びる凸部を、嵌合部４１ｂの外側面に設け、それが溝部５２ａの内側面と嵌合部４１ｂの外側面との間に介在するようにしてもよい。
　いずれの構成においても、支持脚部５２の溝部５２ａの側面と嵌合部４１ｂの内側面または外側面との間に凸部４１ｈが介在し、前記嵌合部４１ｂを前記溝部５２に嵌入することができる。 Moreover, in the said embodiment, the convex part 41h (rib-shaped protrusion) extended in the axial direction is provided in the inner surface of the fitting part 41b, and this convex part 41h is the fitting part and the inner surface of the groove part 52a. It was assumed to be interposed between the inner surface of 41a.
However, in the present invention, the configuration is not limited thereto, and a convex portion extending in the axial direction is provided, for example, on the inner surface of the groove portion 52a of the support leg portion 52, and this is the inner surface of the groove portion 52a. You may make it interpose between the inner surface or the outer surface of the fitting part 41b.
Or the convex part extended in an axial direction may be provided in the outer surface of the fitting part 41b, and you may make it interpose between the inner surface of the groove part 52a, and the outer surface of the fitting part 41b.
In any configuration, the convex portion 41 h is interposed between the side surface of the groove portion 52 a of the support leg portion 52 and the inner side surface or the outer surface of the fitting portion 41 b, and the fitting portion 41 b is fitted into the groove portion 52. Can do.
　以上説明したように、第７の実施形態にかかる穿刺具１は、外針２１と、前記外針２１の基端部を保持すると共に、側面に突起部位を有する外針ハブ２２と、前記外針２１に先端部が挿入される内針３と、前記内針の基端部を保持する筒状の内針ハブ４１と、前記外針を覆うプロテクタ５とを備える穿刺具であって、前記プロテクタ５は、前記外針２１を収容する外針係止部５１と、前記外針係止部５１から軸線方向に延設されて該プロテクタの側面を形成すると共に、該側面に開口部５３を形成する支持脚部５２とを有し、前記内針ハブ４１の一端側には、該内針ハブの周方向に沿って形成された嵌合部４１ｂが設けられ、前記支持脚部５２の一端側には、前記嵌合部４１ｂの周方向に沿って形成され、所定の長さと幅を有する溝部５２ａが設けられ、前記プロテクタ５の側面の開口部に前記外針ハブ２２の突起部位２２Ａ，２２Ｂが配置され、前記支持脚部５２の溝部５２ａに前記嵌合部４１ｂの一部が嵌入され、前記外針２１が前記外針係止部５１の空間部に収容されることに特徴を有する。
　このような構成によれば、前記プロテクタ５の側面には、開口部５３が設けられるため、前記開口部５３に突起部位２２Ａ，２２Ｂ（分岐管や翼など）を配置することができ、支持脚部５２を前記突起部位２２Ａ，２２Ｂに干渉させずに内針ハブ４１に嵌合させることができる。
　即ち、外針ハブ２２に分岐管や翼などの突起部位２２Ａ，２２Ｂが設けられている場合にも、プロテクタ５を大型化することなく確実に装着することができ、前記前記外針係止部５１により外針２１及び該外針の先端から突出した内針３を収容して保護し、それらの位置ずれを防止すると共に、安全面を確保することができる。 As described above, the puncture device 1 according to the seventh embodiment includes the outer needle 21, the outer needle hub 22 that holds the proximal end portion of the outer needle 21 and has a protruding portion on the side surface, and the outer A puncture device comprising an inner needle 3 into which a distal end portion is inserted into a needle 21, a cylindrical inner needle hub 41 that holds a proximal end portion of the inner needle, and a protector 5 that covers the outer needle, The protector 5 includes an outer needle locking portion 51 that accommodates the outer needle 21, an axial direction extending from the outer needle locking portion 51 to form a side surface of the protector, and an opening 53 on the side surface. And a fitting portion 41b formed along the circumferential direction of the inner needle hub is provided on one end side of the inner needle hub 41, and one end of the supporting leg portion 52 is formed. On the side, a groove portion 52a formed along the circumferential direction of the fitting portion 41b and having a predetermined length and width. Protruding portions 22A and 22B of the outer needle hub 22 are arranged in the opening on the side surface of the protector 5, and a part of the fitting portion 41b is fitted in the groove portion 52a of the support leg portion 52, The needle 21 is accommodated in the space portion of the outer needle locking portion 51.
According to such a configuration, since the opening 53 is provided on the side surface of the protector 5, the projecting portions 22A and 22B (branch pipes, wings, etc.) can be disposed in the opening 53, and the support legs The portion 52 can be fitted to the inner needle hub 41 without interfering with the protruding portions 22A and 22B.
That is, even when the outer needle hub 22 is provided with projecting portions 22A, 22B such as branch pipes and wings, the protector 5 can be securely attached without increasing the size, and the outer needle locking portion 51 can accommodate and protect the outer needle 21 and the inner needle 3 protruding from the tip of the outer needle, prevent positional displacement thereof, and ensure safety.
　尚、前記前記外針係止部５１から軸線方向に沿って複数の前記支持脚部５２が延設され、前記複数の支持脚部５２の間に前記開口部５３が形成されていることが望ましい。
　このように複数の支持脚部５２を設けることにより、プロテクタ５の側面において、周方向に複数の開口部５３を形成することができ、複数の突起部位をそれら開口部５３に配置することができる。 In addition, it is desirable that a plurality of the support leg portions 52 extend from the outer needle locking portion 51 along the axial direction, and the openings 53 are formed between the plurality of support leg portions 52. .
By providing the plurality of support legs 52 in this manner, a plurality of openings 53 can be formed in the circumferential direction on the side surface of the protector 5, and a plurality of protruding portions can be arranged in the openings 53. .
　また、前記支持脚部５２の溝部５２ａの側面と、前記嵌合部４１ｂの内側面または外側面には、それぞれ周方向に沿って延びるリブ状突起５２ｂ，４１ｇが設けられ、前記支持脚部５２の溝部５２ａの側面と前記嵌合部４１ｂの内側面または外側面との間に、前記リブ状突起５２ｂ，４１ｇが介在し、それらが互いに係合することが望ましい。
　このように互いに係合するリブ状突起５２ｂ，４１ｇを設けることによって、プロテクタ５の内針ハブ４１に対する抜け止めをより確実なものとすることができる。
　或いは、前記支持脚部５２の溝部５２ａの側面、或いは前記嵌合部４１ｂの内側面または外側面のいずれか一方に、周方向に沿って延びるリブ状突起が設けられ、前記支持脚部５２の溝部５２ａの側面と前記嵌合部４１ｂの内側面または外側面との間に、前記リブ状突起が介在し、前記支持脚部５２の溝部５２ａに前記嵌合部４１ｂが嵌入されるようにしてもよい。
　このように前記支持脚部５２の溝部５２ａの側面、或いは前記嵌合部４１ｂの内側面または外側面のいずれか一方に周方向に延びるリブ状突起を設けることによっても、プロテクタ５の内針ハブ４１に対する抜け止め効果を得ることができる。
　また、前記支持脚部５２の溝部５２ａの側面、或いは前記嵌合部４１ｂの内側面または外側面のいずれかに、軸線方向に延びるリブ状突起４１ｈが設けられ、前記支持脚部５２の溝部５２ａの側面と前記嵌合部４１ｂの内側面または外側面との間に、前記リブ状突起４１ｈが介在し、前記支持脚部５２の溝部５２ａに前記嵌合部４１ｂが嵌入されることが望ましい。
　このように軸線方向に延びるリブ状突起４１ｈを設けることによって、プロテクタ５の軸方向の位置ずれを防止することができる。 Further, rib- like protrusions 52b and 41g extending along the circumferential direction are provided on the side surface of the groove portion 52a of the support leg portion 52 and the inner side surface or the outer surface of the fitting portion 41b, respectively. It is desirable that the rib- like projections 52b and 41g are interposed between the side surface of the groove portion 52a and the inner side surface or the outer surface of the fitting portion 41b, and engage with each other.
By thus providing the rib- like protrusions 52b and 41g that engage with each other, the protector 5 can be more reliably prevented from coming off from the inner needle hub 41.
Alternatively, a rib-like protrusion extending along the circumferential direction is provided on either the side surface of the groove portion 52a of the support leg portion 52 or the inner side surface or the outer side surface of the fitting portion 41b. The rib-like protrusion is interposed between the side surface of the groove portion 52a and the inner surface or the outer surface of the fitting portion 41b so that the fitting portion 41b is fitted into the groove portion 52a of the support leg portion 52. Also good.
Thus, the inner needle hub of the protector 5 can also be provided by providing a rib-like protrusion extending in the circumferential direction on either the side surface of the groove portion 52a of the support leg portion 52 or the inner side surface or the outer side surface of the fitting portion 41b. The retaining effect for 41 can be obtained.
Further, a rib-like protrusion 41h extending in the axial direction is provided on either the side surface of the groove portion 52a of the support leg portion 52 or the inner side surface or the outer surface of the fitting portion 41b, and the groove portion 52a of the support leg portion 52 is provided. It is desirable that the rib-like protrusion 41 h is interposed between the side surface of the fitting portion 41 b and the inner side surface or the outer side surface of the fitting portion 41 b, and the fitting portion 41 b is fitted into the groove portion 52 a of the support leg portion 52.
By providing the rib-like protrusion 41h extending in the axial direction as described above, the axial displacement of the protector 5 can be prevented.
（第８の実施形態）
第８の実施形態について、図４４乃至図５０に基づいて説明する。尚、第1～第７の実施形態の部材と同様な部材は、同一符号を付し、その詳細な説明は省略する。この第８の実施形態は、第７の実施形態に示したプロテクタを改良したものである。 (Eighth embodiment)
The eighth embodiment will be described with reference to FIGS. 44 to 50. FIG. The same members as those in the first to seventh embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. In the eighth embodiment, the protector shown in the seventh embodiment is improved.
　以下、本発明の第８の実施形態にかかる穿刺具について、図４４乃至図５０に基づいて説明する。 Hereinafter, a puncture device according to an eighth embodiment of the present invention will be described with reference to FIGS.
　この穿刺具１の内針ハブ４１の先端側には、本体４１ａの筒径よりも拡径された筒状の嵌合部４１ｂが一体形成されている（若しくは内針ハブ４１と別体の場合には本体４１ａに強固に嵌合している）。この嵌合部４１ｂの外周面には、軸方向に貫通する一対の係止孔４１ｂ１が相対して設けられている、前記一対の係止孔４１ｂ１は、それぞれ嵌合部４１ｂの外周面において径外方に突設され、嵌合部４１ｂの周方向に沿って所定の長さを有している。尚、前記一対の係止孔４１ｂ１は、内針ハブ４１をプロテクタ５と嵌合させるために設けられている。 On the distal end side of the inner needle hub 41 of the puncture device 1, a cylindrical fitting portion 41b having a diameter larger than the cylinder diameter of the main body 41a is integrally formed (or in the case of a separate body from the inner needle hub 41). Is firmly fitted to the main body 41a). A pair of locking holes 41b1 penetrating in the axial direction is provided on the outer peripheral surface of the fitting portion 41b so as to face each other. The pair of locking holes 41b1 have a diameter on the outer peripheral surface of the fitting portion 41b. It protrudes outward and has a predetermined length along the circumferential direction of the fitting portion 41b. The pair of locking holes 41 b 1 are provided for fitting the inner needle hub 41 with the protector 5.
　また、プロテクタ５は、図４９に示すように、外針２１及び外針２１の先端から突出した内針３を収容可能な円筒状の外針係止部５１（図４７，図４８参照）と、この外針係止部５１の外側周面から拡径しながら軸方向に延びる一対の支持脚部５２とを有する。前記一対の支持脚部５２は、例えば、中空円錐体からなるキャップ形状の左右両側を軸方向に沿って切り欠くことで形成される。これにより、プロテクタ５の側面において、一対の支持脚部５２の間には開口部５３が形成される。 Further, as shown in FIG. 49, the protector 5 includes a cylindrical outer needle locking portion 51 (see FIGS. 47 and 48) that can accommodate the outer needle 21 and the inner needle 3 protruding from the tip of the outer needle 21. And a pair of support legs 52 extending in the axial direction while expanding from the outer peripheral surface of the outer needle locking portion 51. The pair of support legs 52 are formed by, for example, notching the left and right sides of a cap shape made of a hollow cone along the axial direction. Thus, an opening 53 is formed between the pair of support legs 52 on the side surface of the protector 5.
　また、前記支持脚部５２は、その先端に外針係止部５１５１の同心円に沿って（嵌合部４１ｂの周方向に沿って）湾曲形成された係止爪５２ａが設けられ、係止爪５２ａは周方向に所定の長さを有している。
　具体的には、係止爪５２ａは、内針ハブ４１に設けられた係止孔４１ｂ１に挿入可能な大きさであって、係止孔４１ｂ１に完全に挿入されることにより係止孔４１ｂ１に係止するようになっている。また、前記係止爪５２ａと前記係止孔４１ｂ１の径方向の幅寸法は、前記係止爪５２ａが係止孔４１ｂ１に係止した後に、係止爪５２ａを人為的に径方向内側に押し込むことで係止孔４１ｂ１との係合を解除できる大きさに形成されている。
　また、外針係止部５１の後端には、軸方向に伸縮自在なスプリング５４（弾性部材）の一端が設けられている。このスプリング５４は、プロテクタ５が装着された際に、その他端が外針ハブ２２に形成された段差部２２Ｃに当接し圧縮されるようになっている（図４７、図４８参照）。 The support leg 52 is provided with a locking claw 52a curved at the tip of the support leg 52 along the concentric circle of the outer needle locking portion 5151 (along the circumferential direction of the fitting portion 41b). 52a has a predetermined length in the circumferential direction.
Specifically, the locking claw 52a has a size that can be inserted into a locking hole 41b1 provided in the inner needle hub 41. When the locking claw 52a is completely inserted into the locking hole 41b1, the locking claw 52a is inserted into the locking hole 41b1. It is designed to be locked. The radial width of the locking claw 52a and the locking hole 41b1 is such that the locking claw 52a is artificially pushed radially inward after the locking claw 52a is locked to the locking hole 41b1. By this, it is formed in a size that can release the engagement with the locking hole 41b1.
In addition, at the rear end of the outer needle locking portion 51, one end of a spring 54 (elastic member) that is elastic in the axial direction is provided. When the protector 5 is mounted, the other end of the spring 54 comes into contact with the step portion 22C formed on the outer needle hub 22 and is compressed (see FIGS. 47 and 48).
プロテクタ５を装着する際には、図４７に示すようにプロテクタ５が有する一対の支持脚部５２に形成された係止爪５２ａを、それぞれ内針ハブ４１の嵌合部４１ｂに設けられた係止孔４１ｂ１に挿入し係止させる。このとき外針係止部５１と外針ハブ２２との間でスプリング５４が圧縮され、プロテクタ５と内針ハブ４１とを離間する方向に付勢力が生じる。これにより、プロテクタ５は内針ハブ４１に対し、強固に安定して装着（嵌合）された状態となり、プロテクタ５の支持脚部５２に支持された外針係止部５１に、外針２１及び該外針２１の先端から突出した内針３が収容される。 47, when the protector 5 is mounted, the engaging claws 52a formed on the pair of support leg portions 52 of the protector 5 are provided on the fitting portions 41b of the inner needle hub 41, respectively. Insert and lock into the stop hole 41b1. At this time, the spring 54 is compressed between the outer needle locking portion 51 and the outer needle hub 22, and an urging force is generated in a direction in which the protector 5 and the inner needle hub 41 are separated from each other. As a result, the protector 5 is firmly and stably attached (fitted) to the inner needle hub 41, and the outer needle 21 is attached to the outer needle locking portion 51 supported by the support leg portion 52 of the protector 5. The inner needle 3 protruding from the tip of the outer needle 21 is accommodated.
　また、図４４、図４５に示すように、プロテクタ５の側面に設けられた開口部５３に外針ハブ２２の分岐管２２Ｂと一対の翼２２Ａとが配置された状態となるため、支持脚部５２は前記分岐管２２Ａと一対の翼２２Ｂとに干渉することなく内針ハブ４１の嵌合部４１ａに嵌合する。
　即ち、外針ハブ２２に分岐管２２Ｂや翼２２Ａが設けられていても、プロテクタ５を確実に装着することができ、外針係止部５１５１により外針２１及び該外針２１の先端から突出した内針３を収容して保護することができる。 44 and 45, since the branch pipe 22B and the pair of blades 22A of the outer needle hub 22 are arranged in the opening 53 provided on the side surface of the protector 5, the support leg portion is provided. 52 is fitted into the fitting portion 41a of the inner needle hub 41 without interfering with the branch pipe 22A and the pair of blades 22B.
That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely attached, and the outer needle 21 is projected from the outer needle 21 and the tip of the outer needle 21 by the outer needle locking portion 5151. The inner needle 3 can be accommodated and protected.
また、前記プロテクタ５を外す際には、支持脚部５２の先端の係止爪５２ａを径方向内側に押し込んで、内針ハブ４１の係止孔４１ｂ１との係合を解除する。前記係止爪５２ａと前記係止孔４１ｂ１との係合が解除されると、スプリング５４の付勢力により、前記係止爪５２ａは前記係止孔４１ｂ１から容易に抜ける。そして、内針ハブ４１に対しプロテクタ５を軸方向（離間する方向）に引き抜くことで、プロテクタ５が内針ハブ４１から分離される。 Further, when the protector 5 is removed, the engagement claw 52a at the tip of the support leg 52 is pushed inward in the radial direction to release the engagement with the engagement hole 41b1 of the inner needle hub 41. When the engagement between the locking claw 52a and the locking hole 41b1 is released, the locking claw 52a is easily removed from the locking hole 41b1 by the biasing force of the spring 54. And the protector 5 is isolate | separated from the inner needle hub 41 by pulling out the protector 5 with respect to the inner needle hub 41 in the axial direction (direction away).
　以上のように本発明に係る一実施形態によれば、プロテクタ５の側面には、支持脚部５２の間に開口部５３が設けられるため、前記開口部５３に外針ハブ２２の分岐管２２Ｂと一対の翼２２Ａとを配置することができ、支持脚部５２を前記分岐管２２Ｂ及び翼２２Ａに干渉させずに内針ハブ４１に嵌合させることができる。
　即ち、外針ハブ２２に分岐管２２Ｂや翼２２Ａが設けられていても、プロテクタ５を大型化させずに確実に装着することができ、外針係止部５１により外針２１及び該外針２１の先端から突出した内針３を収容して保護し、それらの位置ずれを防止すると共に安全面を確保することができる。 As described above, according to the embodiment of the present invention, since the opening 53 is provided between the support legs 52 on the side surface of the protector 5, the branch pipe 22 </ b> B of the outer needle hub 22 is provided in the opening 53. And the pair of blades 22A, and the support leg 52 can be fitted to the inner needle hub 41 without interfering with the branch pipe 22B and the blade 22A.
That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely attached without increasing the size, and the outer needle 21 and the outer needle can be attached by the outer needle locking portion 51. The inner needle 3 protruding from the tip of 21 can be accommodated and protected to prevent positional displacement thereof and to ensure safety.
　以上説明したように、第８の実施形態にかかる穿刺具１は、外針２１と、前記外針の基端部を保持すると共に、側面に突起部位を有する外針ハブ２２と、前記外針２１に先端部が挿入される内針３と、前記内針の基端部を保持する筒状の内針ハブ４１と、前記外針を覆うプロテクタ５とを備える穿刺具であって、前記プロテクタ５は、前記外針２１を収容する外針係止部５１と、前記外針係止部５１から軸線方向に延設されて該プロテクタの側面を形成すると共に、該側面に開口部を形成する支持脚部５２とを有し、前記支持脚部５２の一端側には係止爪５２ａが設けられ、前記内針ハブ４１の一端側には、前記支持脚部５２の係止爪５２ａが挿入可能な係止孔４１ｂ１が設けられ、前記プロテクタ５の側面の開口部５３に前記外針ハブ２２の突起部位２２Ａ，２２Ｂが配置され、前記支持脚部５２の係止爪５２ａが前記内針ハブ４１の係止孔４１ｂ１に挿入されて係止し、前記外針２１が前記外針係止部５１に収容されることに特徴を有する。
　このような構成によれば、前記プロテクタ５の側面には、開口部５３が設けられるため、前記開口部５３に突起部位２２Ａ，２２Ｂ（分岐管や翼など）を配置することができ、支持脚部５２を前記突起部位２２Ａ，２２Ｂに干渉させずに内針ハブ４１に嵌合させることができる。
　即ち、外針ハブ２２に分岐管や翼などの突起部位が設けられている場合でも、プロテクタ５を大型化させずに確実に装着することができ、前記外針係止部５１により外針２１及び該外針の先端から突出した内針３を収容して保護し、それらの位置ずれを防止すると共に安全面を確保することができる。 As described above, the puncture device 1 according to the eighth embodiment includes the outer needle 21, the outer needle hub 22 that holds the proximal end portion of the outer needle and has a protruding portion on the side surface, and the outer needle. 21. A puncture device including an inner needle 3 into which a distal end portion is inserted into 21, a cylindrical inner needle hub 41 that holds a proximal end portion of the inner needle, and a protector 5 that covers the outer needle. 5 includes an outer needle locking portion 51 that accommodates the outer needle 21, and extends from the outer needle locking portion 51 in the axial direction to form a side surface of the protector, and an opening is formed on the side surface. A locking claw 52a is provided on one end of the support leg 52, and a locking claw 52a of the support leg 52 is inserted on one end of the inner needle hub 41. A possible locking hole 41 b 1 is provided, and the outer needle hub 22 is formed in the opening 53 on the side surface of the protector 5. The projecting portions 22A and 22B are arranged, the locking claw 52a of the support leg 52 is inserted and locked in the locking hole 41b1 of the inner needle hub 41, and the outer needle 21 is locked to the outer needle locking portion 51. It is characterized by being accommodated in
According to such a configuration, since the opening 53 is provided on the side surface of the protector 5, the projecting portions 22A and 22B (branch pipes, wings, etc.) can be disposed in the opening 53, and the support legs The portion 52 can be fitted to the inner needle hub 41 without interfering with the protruding portions 22A and 22B.
That is, even when the outer needle hub 22 is provided with a projecting portion such as a branch pipe or a wing, the protector 5 can be securely mounted without increasing the size, and the outer needle 21 is secured by the outer needle locking portion 51. In addition, the inner needle 3 protruding from the tip of the outer needle can be accommodated and protected to prevent positional displacement thereof and ensure safety.
　尚、前記外針係止部５１から軸線方向に沿って複数の前記支持脚部５２が延設され、前記内針ハブ４１の一端側には、前記複数の支持脚部５２の一端側に設けられた係止爪５２ａに対応して複数の前記係止孔４１ｂ１が設けられていることが望ましい。
　このように複数の支持脚部５２に設けられた係止爪５２ａがそれぞれ内針ハブ４１の一端側に係止するように構成することにより、外針係止部５１を安定して支持することができる。 A plurality of the support leg portions 52 extend from the outer needle locking portion 51 along the axial direction, and are provided on one end side of the inner needle hub 41 on one end side of the plurality of support leg portions 52. It is desirable that a plurality of the locking holes 41b1 are provided corresponding to the locking claws 52a.
In this way, the locking claw 52a provided on the plurality of support legs 52 is configured to be locked to one end side of the inner needle hub 41, thereby stably supporting the outer needle locking portion 51. Can do.
　また、前記外針係止部５１から軸線方向に沿って複数の前記支持脚部５２が延設され、前記複数の支持脚部５２の間に前記開口部５３が形成されていることが望ましい。
　このように複数の支持脚部５３を設けることにより、プロテクタ５の側面において、周方向に複数の開口部５３を形成することができ、複数の突起部位をそれら開口部５３に配置することができる。 Further, it is desirable that a plurality of the support leg portions 52 extend from the outer needle locking portion 51 along the axial direction, and the openings 53 are formed between the plurality of support leg portions 52.
By providing the plurality of support legs 53 in this way, a plurality of openings 53 can be formed in the circumferential direction on the side surface of the protector 5, and a plurality of protruding portions can be arranged in the openings 53. .
　また、前記プロテクタ５は、軸方向に伸縮自在な弾性部材５４を有し、前記弾性部材５４は、前記支持脚部５２の係止爪５２ａが前記内針ハブ４１の係止孔４１ｂ１に係止する状態で圧縮され、該プロテクタ５と前記内針ハブ４１とを離間する方向に付勢することが望ましい。
　このように弾性部材５４を設けることにより、プロテクタ５の内針ハブ４１に対する嵌合をより確実なものとすることができる。また、プロテクタ５と内針ハブ４１との分離（プロテクタの取り外し）も弾性部材５４の付勢力により容易に行うことができると共に外針ハブの位置ずれを防止することができる。 The protector 5 has an elastic member 54 that can be expanded and contracted in the axial direction. The elastic member 54 is engaged with the engaging claw 52 a of the support leg 52 in the engaging hole 41 b 1 of the inner needle hub 41. It is preferable that the protector 5 and the inner needle hub 41 are urged in a direction in which the protector 5 and the inner needle hub 41 are separated from each other.
By providing the elastic member 54 in this manner, the fitting of the protector 5 to the inner needle hub 41 can be made more reliable. Further, separation of the protector 5 and the inner needle hub 41 (removal of the protector) can be easily performed by the biasing force of the elastic member 54, and displacement of the outer needle hub can be prevented.
　以上のように本発明に係る第８の実施形態によれば、プロテクタ５の側面には、支持脚部５２の間に開口部５３が設けられるため、前記開口部５３に外針ハブ２２の分岐管２２Ｂと一対の翼２２Ａとを配置することができ、支持脚部５２を前記分岐管２２Ｂ及び翼２２Ａに干渉させずに内針ハブ４１に嵌合させることができる。
　即ち、外針ハブ２２に分岐管２２Ｂや翼２２Ａが設けられていても、プロテクタ５を大型化させずに確実に装着することができ、外針係止部５１により外針２１及び該外針２１の先端から突出した内針３を収容して保護し、それらの位置ずれを防止すると共に安全面を確保することができる。 As described above, according to the eighth embodiment of the present invention, since the opening 53 is provided between the support legs 52 on the side surface of the protector 5, the outer needle hub 22 branches to the opening 53. The tube 22B and the pair of blades 22A can be arranged, and the support leg 52 can be fitted to the inner needle hub 41 without interfering with the branch tube 22B and the blades 22A.
That is, even if the outer needle hub 22 is provided with the branch pipe 22B and the blades 22A, the protector 5 can be securely attached without increasing the size, and the outer needle 21 and the outer needle can be attached by the outer needle locking portion 51. The inner needle 3 protruding from the tip of 21 can be accommodated and protected to prevent positional displacement thereof and to ensure safety.

Claims (5)

  1. 　外針と、前記外針の基端部を保持する外針ハブと、前記外針に先端部が挿入される内針と、前記内針の基端部を保持する内針ハブと、内針ハブの内部に進退自在に取り付けられる外筒と、前記外針ハブを把持する把持手段を有すると共に、前記外筒の内部に進退自在に取付けられた内筒とを備え、
    少なくとも前記外筒が軟質の合成樹脂材料によって形成されていることを特徴とする穿刺具。     An outer needle, an outer needle hub that holds the proximal end portion of the outer needle, an inner needle that has a distal end portion inserted into the outer needle, an inner needle hub that holds the proximal end portion of the inner needle, and an inner needle An outer cylinder that is movably attached to the inside of the hub, and an inner cylinder that has a gripping means for grasping the outer needle hub and is movably attached to the inside of the outer cylinder,
    A puncture device, wherein at least the outer cylinder is made of a soft synthetic resin material.
  2. 前記内筒が、軟質の合成樹脂材料によって形成されていることを特徴とする請求項１記載の穿刺具。 The puncture device according to claim 1, wherein the inner cylinder is made of a soft synthetic resin material.
  3. 前記内針ハブが、軟質の合成樹脂材料によって形成されていることを特徴とする請求項１または請求項２記載の穿刺具。 The puncture device according to claim 1 or 2, wherein the inner needle hub is made of a soft synthetic resin material.
  4. 前記軟質の合成樹脂材料は、伸び率が１００％以上である合成樹脂であることを特徴とする請求項１乃至請求項３のいずれかに記載の穿刺具。 The puncture device according to any one of claims 1 to 3, wherein the soft synthetic resin material is a synthetic resin having an elongation percentage of 100% or more.
  5. 前記軟質の合成樹脂材料は、ポリプロピレンであることを特徴とする請求項１乃至請求項４のいずれかに記載の穿刺具。
          The puncture device according to any one of claims 1 to 4, wherein the soft synthetic resin material is polypropylene.
PCT/JP2013/058243 2012-03-23 2013-03-22 Puncture tool WO2013141347A1 (en)

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US14/384,276 US9782199B2 (en) 2012-03-23 2013-03-22 Puncture device
CN201380016113.4A CN104203328B (en) 2012-03-23 2013-03-22 Lancet device

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JP2012-067144 2012-03-23
JP2012067144 2012-03-23
JP2012220073A JP6144891B2 (en) 2012-10-02 2012-10-02 Puncture tool
JP2012220072A JP6144890B2 (en) 2012-10-02 2012-10-02 Puncture tool
JP2012-220072 2012-10-02
JP2012-220073 2012-10-02
JP2013-056567 2013-03-19
JP2013-056568 2013-03-19
JP2013056568A JP6144936B2 (en) 2013-03-19 2013-03-19 Puncture tool
JP2013056567A JP6030011B2 (en) 2012-03-23 2013-03-19 Puncture tool

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104027157A (en) * 2014-02-28 2014-09-10 陈裕生 Fixed structure of ultrasonic puncture needle and ultrasonic puncture needle
WO2021252351A3 (en) * 2020-06-09 2022-02-24 Becton, Dickinson And Company Needle cover retention

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JPH09234250A (en) * 1996-02-29 1997-09-09 Becton Dickinson & Co Assembly of adaptor with spine and catheter
JPH10165511A (en) * 1996-12-02 1998-06-23 Becton Dickinson & Co Assembly of catheter and introducing needle
JP2000501960A (en) * 1995-12-11 2000-02-22 チン ロン ワン Transluminal catheter with flexible extender and needle tip protector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000501960A (en) * 1995-12-11 2000-02-22 チン ロン ワン Transluminal catheter with flexible extender and needle tip protector
JPH09234250A (en) * 1996-02-29 1997-09-09 Becton Dickinson & Co Assembly of adaptor with spine and catheter
JPH10165511A (en) * 1996-12-02 1998-06-23 Becton Dickinson & Co Assembly of catheter and introducing needle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104027157A (en) * 2014-02-28 2014-09-10 陈裕生 Fixed structure of ultrasonic puncture needle and ultrasonic puncture needle
CN104027157B (en) * 2014-02-28 2016-02-17 陈裕生 A kind of fixed structure of ultrasound wave puncture needle and ultrasound wave puncture needle
WO2021252351A3 (en) * 2020-06-09 2022-02-24 Becton, Dickinson And Company Needle cover retention

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