JP5212093B2 - Wing needle assembly - Google Patents

Description

  The present invention relates to a winged needle assembly, and more particularly to an improvement in a winged needle assembly in which a cannula having a cutting edge (sharp needle tip) at a front end can be accommodated in a protective cylinder after use.

  2. Description of the Related Art Conventionally, a so-called winged needle having a flexible fixing wing is one type of puncture needle that is punctured into a patient's vein or the like when performing transfusion or blood transfusion on a patient or the like. This winged needle is, for example, picked by a doctor or nurse with the fixing wing bent, punctures the cannula into a vein, etc. Used by fixing to the surface with tape or the like.

  By the way, after using the winged needle, there is a possibility that a doctor, a nurse, or the like erroneously punctures a finger or the like with a cannula blade tip. When such an accident occurs, there is a risk of causing infection by blood adhering to the blade edge.

  Therefore, in order to prevent the occurrence of such an erroneous puncture accident, a winged needle assembly (a winged indwelling needle) having a structure that can store the cannula in a protective cylinder after use has been proposed (for example, the following) Patent Document 1). In this winged needle assembly, a movable unit including a hub with a rear part attached to the front part of the cannula and a flexible engagement arm fixed to the hub is provided for protection through which the cannula is inserted. It is held by a holder having a cylinder and a fixing wing fixed thereto. And in the holding state, the movable unit is between a use position where the front part of the cannula protrudes from the front end opening of the protection cylinder and a storage position where only the front end including the blade edge of the cannula is stored in the protection cylinder. It can be moved in the axial direction of the cannula. In addition, when the movable unit is located at the use position, the holder includes an engagement means for detachably engaging with the engagement arm of the movable unit to fix the movable unit, and the use position and storage of the movable unit A guide member is provided that guides movement between the movable unit and the movable unit, and that engages and disengages the movable unit when the movable unit is located at the storage position.

  In the winged needle assembly having such a structure, after use, the movable unit is moved to the storage position, engaged with the guide member, and fixed so that the blade edge of the cannula is fixed in the protective cylinder. Stored and protected. Thus, the occurrence of an erroneous puncture accident after use can be effectively prevented.

  However, this conventional winged needle assembly may have the following problems due to its structure. That is, in the conventional winged needle assembly, when the movable unit is located at the use position, the engagement arm that engages with the engaging means of the holder and fixes the movable unit is bent and deformed. The structure is such that the engagement with the coupling means can be released. For this reason, for example, when the cannula is punctured into a patient's vein or the like, if the engagement arm is touched by mistake or by some sort of bending and is bent and deformed, the use position of the movable unit, that is, The fixed state at the position where the front part including the blade edge of the cannula protrudes from the front end opening of the protective cylinder is released, the movable unit becomes freely movable, and it becomes difficult to puncture the vein of the cannula or the like Such a situation could occur.

  The problem of malfunction of the engagement arm is that the direction of the force applied to the fixing wing when a doctor or nurse picks the fixing wing to bend when puncturing the vein of the cannula or the like. This is likely to occur in a winged needle assembly in which the input directions of the force applied to the engagement arm are the same as each other when the engagement of the engagement arm with the engagement means is released. Further, in the conventional winged needle assembly having the above-described structure, in particular, since only the front end including the blade edge of the cannula is stored in the protective cylinder, the protective cylinder and the entire holder having the same are also provided. The axial length of is shortened. Therefore, the formation position of the locking means with which the engagement arm engages is a position close to the fixing wing. Therefore, when the fixing wing is picked, the engagement arm comes into contact with the fixing wing. There was a high possibility that it would be bent unintentionally.

JP 2008-29812 A

  Therefore, according to the present invention, when the movable unit is located at the use position, the engagement arm is prevented from being bent and deformed unintentionally, and the fixed state of the movable unit at the use position is advantageously ensured. Thus, an object of the present invention is to provide a winged needle assembly in which a puncture operation to a cannula patient or the like can be performed constantly and stably.

  The present invention can be suitably implemented in various aspects as listed below in order to solve the problems described above or the problems grasped from the description and drawings of the entire specification. Each aspect described below can be adopted in any combination, and the aspect or technical features of the present invention are not limited to those described below, and the entire specification. It should be understood that the present invention can be recognized based on the description of the invention and the inventive idea disclosed in the drawings.

<1> (a) A movable unit in which a hub is provided at the rear end of a cannula having a cutting edge at the front end, and a flexible engagement arm is provided for the hub; and (b) the cannula A use position in which the front part of the cannula protrudes from the front end opening of the protection cylinder, and a storage position in which the front end including the cutting edge of the cannula is stored in the protection cylinder. A holder for holding the movable unit movably in the axial direction, (c) a flexible fixing wing provided on the holder, and (d) the holder with respect to the rear portion of the holder. A guide that is provided so as to extend in the axial direction of the cannula and includes a holding unit that guides movement of the movable unit between the use position and the storage position and holds the movable unit in the storage position. And (e) the engagement arm is releasable The movable unit can be fixed at the use position by the engagement of the engagement arm, and the fixation of the movable unit can be released by releasing the engagement of the engagement arm. Engaging means provided on the holder; and (f) being able to be locked / detached with respect to the engaging arm, and restricting deformation of the engaging arm by locking to the engaging arm. While the engagement arm is locked to an engagement state with the engagement means, the engagement arm is allowed to bend and deform by being detached from the engagement arm, and the engagement arm is engaged with the engagement means. A winged needle assembly comprising: locking means for releasing the lock.

<2> (g) The engagement arm is adapted to be engaged with the engagement means based on the elasticity of the engagement arm, and an external force is applied to the engagement arm to resist the elasticity. The engagement of the engagement arm with the engagement means is released by bending deformation, and (h) the lock means is removably locked with respect to the engagement arm. With the wing according to the above aspect <1>, the bending deformation against the elasticity of the engagement arm is restricted by the engagement arm, and the engagement state of the engagement arm with the engagement means is locked. Needle assembly.

<3> (i) An input direction of an external force applied to the engaging arm to bend and deform the engaging arm, and an input direction of a force applied to the fixing wing to bend and deform the fixing wing The winged needle according to the above aspect <2>, wherein the engaging arm and the fixing wing are provided to the movable unit and the holder, respectively, so that they are in the same direction. Assembly.

<4> (j) The engaging arm is held in an elastically deformed state by the locking action of the locking means with respect to the engaging arm so that the engaging arm is engaged and locked with the engaging means. (K) The above aspect in which the engagement means is elastically restored by releasing the lock means from the engagement arm and the engagement with the engagement means is released < 1> A winged needle assembly according to 1>.

<5> (k) When the movable unit is located at the use position, two engagement arms are located on each side of the movable unit, with the holder interposed therebetween. The winged needle assembly according to any one of the above-described aspects <1> to <4>, wherein the winged needle assembly is provided.

<6> (l) Locking that engages with the engagement arm so as to enter between the bending-deformed engagement arm and the holder and prevent recovery of the engagement arm from bending deformation And (m) the locking body is clamped between the engagement arm and the holder based on the restoring force of the engagement arm. The winged needle assembly according to any one of the above aspects <1> to <5>, wherein the locking of the body to the engagement arm is maintained.

<7> (n) In a state where the locking body is displaceable between a position where the locking body is locked to the engagement arm and a position where the locking to the engagement arm is released, the locking body is The winged needle assembly according to the above aspect <6>, wherein the locking unit further includes a connecting portion that is connected to one of the movable unit and the holder.

<8> (o) The locking body includes a base portion and a locking projection protruding from the base portion, and the locking projection is bent and deformed, and the holder arm and the holder portion. And (p) the base portion of the engagement arm and the holder is inserted into the engagement arm and the holder while being held between the engagement arm and the holder. According to the above aspect <6> or <7>, wherein the amount of the locking protrusion entering the engagement arm and the holder is regulated by contacting at least one of them Wing needle assembly.

  That is, the winged needle assembly according to the present invention prevents the engagement arm from being bent and deformed unless the lock of the engagement between the engagement arm and the engagement means by the lock means is intentionally released. . Therefore, the engaging arm is unintentionally bent and deformed when the movable unit is in the use position, regardless of the bending deformation direction or forming position of the engaging arm and the fixing wing. This is reliably prevented, and the fixed state of the movable unit at the use position can be stably secured.

  Therefore, by using such a winged needle assembly according to the present invention, a puncture operation for a cannula patient or the like can be performed stably and reliably at all times. As a result, treatment using a winged needle assembly for infusion or blood transfusion to a patient or the like can be performed more smoothly and safely.

  Hereinafter, in order to further clarify the present invention, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 is a top view illustrating an embodiment of a winged needle assembly having a structure according to the present invention, FIG. 2 is a side view, FIG. 3 is a bottom view, and FIG. FIG. 5 shows a partially enlarged explanatory view of the bottom surface form, and FIG. 5 shows a partially enlarged enlarged explanatory view. As is clear from these drawings, the winged needle assembly of the present embodiment has a movable unit 10 and a holder 12. In the following, the front-rear direction corresponds to the direction corresponding to the left-right direction in FIG. 1, the left-right direction refers to the direction corresponding to the up-down direction in FIG. Each direction is shown.

  More specifically, the movable unit 10 includes a cannula 14 and a hub 16 to which the cannula 14 is attached, as shown in FIGS. 6 to 9 showing an upper surface shape, a side surface shape, a lower surface shape, and a cross-sectional shape, respectively. And an operating body 18 attached to the hub 16. The cannula 14 has an elongated tube shape, and has a cutting edge 20 with a sharp front end. The cannula 14 is formed using, for example, an elastic metal material such as a stainless material.

  The hub 16 has a substantially cylindrical shape as a whole, and is formed using a resin material such as vinyl chloride resin, ABS resin, polycarbonate, polypropylene, polyester, or polyethylene. The rear portion of the cannula 14 is inserted and fixed in the front opening of the hub 16. On the other hand, a tube 21 is externally fitted to the rear end portion of the hub 16 and bonded with an adhesive or the like. The tube 21 is formed using, for example, a translucent resin material having flexibility. Through this tube 21, a fluid such as a predetermined liquid medicine for transfusion, blood for blood transfusion, and the like are guided into the hub 16 and further into the cannula 14.

  The entire operation body 18 is made of a resin molded body that can be elastically deformed or flexibly deformed, and has a substantially C-shaped attachment ring 22 formed by cutting off a part of the circumference of the torus. The mounting ring 22 is externally fitted and fixed to the intermediate portion in the axial direction of the hub 16, whereby the operating body 18 is fixed to the hub 16. On both the left and right sides of the mounting ring 22, rearward extending portions 24 a and 24 b extending toward the rear side of the hub 16 are integrally formed with the mounting ring 22 attached to the hub 16. The two rear extending portions 24a and 24b have one end portion (the end portion on the lower side in FIG. 9) in the width direction (the vertical direction in FIG. 9) protruding downward from the outer peripheral surface of the hub 16, respectively. Yes. The projecting portions of the two rear extending portions 24 a and 24 b are connected to each other by a flat slider 26. That is, the two rear extending portions 24 a and 24 b formed integrally with the mounting ring 22 and the slider 26 that connects the two rear extending portions 24 a and 24 b to each other fix the mounting ring 22 in the hub 16. It arrange | positions so that the circumference | surroundings of the back side part may be surrounded rather than a site | part.

  The slider 26 is disposed below the hub 16 so as to face the outer peripheral surface of the hub 16 with a predetermined distance and to form a gap with the outer peripheral surface of the hub 16. An engaging claw portion 28 is integrally projected on the surface of the slider 26 facing the hub 16. The engaging claw portion 28 is a sliding surface 30 that inclines so that a part of the surface facing the outer peripheral surface of the hub 16 gradually approaches the outer peripheral surface of the hub 16 toward the front end side of the hub 16.

  Engaging arms 32a and 32b are integrally formed at the rear ends of the two rear extending portions 24a and 24b, respectively. The engaging arms 32a and 32b are configured to extend from the rear ends of the rearwardly extending portions 24a and 24b to a predetermined length so as to be spaced apart from the rear ends of the rearwardly extending portions 24a and 24b. The operation portions 34a and 34b, each of which has a portion extending in a predetermined length parallel to the hub 16 from the front end to the front, and the engaging claws 36a and 36b provided at the front ends of the operation portions 34a and 34b are integrated. Have. Further, the front end surfaces of the engaging claws 36 a and 36 b are sliding surfaces 38 a and 38 b that are inclined so as to be gradually separated from the outer peripheral surface of the hub 16 toward the rear end side of the hub 16. An acting force is applied to the respective operating portions 34a and 34b of the engaging arms 32a and 32b so as to bring them closer to each other, so that the two engaging portions are engaged. The arms 32a, 32b are bent and deformed (elastically deformed) so that the tip portions provided with the engaging claws 36a, 36b are close to each other.

  On the other hand, the holder 12 is made of a resin molded body that can be elastically deformed or flexibly deformed similarly to the operation body 18 of the movable unit 10, and shows an upper surface form, a side face form, a lower face form, and a cross-sectional form of the holder 12, respectively. As apparent from FIG. 13, the protective cylinder 40, the engaging protrusion 42, and the guide member 44 are integrally provided. The protective cylinder 40 has a substantially cylindrical shape as a whole, and has an axial length sufficient to surround the entire cutting edge 20 of the cannula 14. In addition, a fixing wing 48 having two wing portions 46a and 46b extending toward both sides in the direction perpendicular to the axis is integrally formed on the outer peripheral surface of the protective cylinder 40. In the fixing wing 48, the two wing portions 46a and 46b are picked by fingers, and the wing portions 46a and 46b are arranged inwardly in the direction perpendicular to the axis of the protective cylinder 40 so as to overlap each other. By applying the acting force, the fixing wing 48 is elastically deformed or bent so as to be folded in two.

  The engaging projecting portion 42 has two plate-shaped projecting portions 43 a and 43 b that project rearward from the rear end of the protective cylinder 40 in a state of being opposed in the vertical direction. Further, the rear end portions of these two plate-like projecting portions 43a and 43b are connected to each other by engaging connecting portions 50a and 50b on the left and right sides thereof. And in the protrusion part 42 for engagement, between two plate-shaped protrusion parts 43a and 43b, the front part of each connection part 50a, 50b of each part opened on both right and left sides is on both right and left sides. The windows 52a and 52b open to the sides. Each of these window portions 52a and 52b has such a size that the engagement claw portions 36a and 36b of the respective engagement arms 32a and 32b of the movable unit 10 can be inserted and removed.

  Of the two plate-like projecting portions 43a and 43b positioned opposite to each other in the vertical direction of the engaging projecting portion 42, a guide member 44 is integrally formed on the lower plate-like projecting portion 43b. . The guide member 44 has an elongated and substantially flat plate shape, and extends rearward from the rear end of the plate-like projecting portion 43b in the axial direction. In addition, a U-shaped slot extending in the length direction is formed at the rear end portion of the guide member 44, and a portion surrounded by the U-shaped slot is bent in the thickness direction of the guide member 44. The engaging piece 56 is deformable. Furthermore, the lower surface of the engagement piece 56 is an inclined guide surface 58 that inclines downward toward the rear. A stopper portion 54 is integrally formed at a portion further rearward than a portion where the engagement piece 56 of the guide member 44 is formed so as to protrude downward.

  On the other hand, the plate-like projecting portion 43a located on the upper side of the two plate-like projecting portions 43a and 43b has a cover extending in the axial direction from the rear end so as to spread in the direction perpendicular to the axis. The member 60 is integrally formed. The cover member 60 has a substantially rectangular flat plate shape having a width larger than the outer diameter of the protective cylinder 40. As will be described later, the axial direction of the cannula 14 when the cannula 14 is located at the storage position. It is arranged covering the middle part. In the present embodiment, a lock member 62 as a lock means is provided integrally with the rear end of the cover member 60.

  More specifically, the lock member 62 includes a locking body 64 and a connecting portion 66. As shown in FIGS. 10 to 12, the locking body 64 has a base portion 68 made of a flat plate larger than the cover member 60 and the plate-like protruding portion 43 a by a predetermined dimension. The connecting portion 66 has a thin strip shape and has a flexibility that can be easily bent. The base portion 68 of the locking body 64 is horizontally disposed above the guide member 44 with a predetermined distance behind the cover member 60, while the band-shaped connecting portion 66 includes the base member 68. It is disposed horizontally between the portion 68 and the cover member 60. The base portion 68 and the cover member 60 are integrally connected by the connecting portion 66, and when the connecting portion 66 is bent in two in the length direction, the base portion 68 is moved to the cover member. 60 and the upper side wall of the engaging projection 42 (see FIG. 2).

  In addition, two locking projections 70a and 70b are formed in the vertical direction on the plate surface of the base portion 68 overlapped with the cover member 60 and the plate-like protruding portion 43a by bending the connecting portion 66. It protrudes integrally so as to extend. These two locking projections 70a and 70b are formed of an elongated round bar-like pin member having the same height and a hemispherical tip surface. Further, the two locking projections 70a and 70b are arranged on the base portion 68 with an extension line of the central axis of the protective cylinder 40 interposed therebetween and at an equal distance from the extension line in the left-right direction. Has been placed. Furthermore, the arrangement interval between the two locking projections 70 a and 70 b is slightly larger than the width in the left-right direction of the front end portion of the cover member 60. As a result, when the base portion 68 is overlapped with the cover member 60 or the plate-like protruding portion 43a by bending the connecting portion 66, the two locking projections 70a and 70b sandwich the front end portion of the cover member 60. It is arranged so as to extend in the vertical direction on both the left and right sides between the two (see FIG. 3). Here, when the two locking projections 70 a and 70 b are in such an arrangement state, the outer peripheral surfaces of the locking projections 70 a and 70 b are the left and right side surfaces of the front end portion of the cover member 60. Can be brought into contact with each other.

  In the winged needle assembly of the present embodiment, as shown in FIGS. 1 to 5, the cannula 14 and the hub 16 are coaxially inserted into the protective cylinder 40 of the holder 12 from the rear opening. In addition, the guide member 44 of the holder 12 is inserted into a gap formed between the slider 26 provided on the operating body 18 and the outer peripheral surface of the hub 16, and the movable unit 10 is assembled to the holder 12. ing. As a result, the movable unit 10 is held by the holder 12 while being movable in the front-rear direction along the axial direction of the protective cylinder 40 and the cannula 14 while the slider 26 is guided by the guide member 44.

  Further, in this winged needle assembly, when the front part of the cannula 14 extending from the front end of the hub 16 protrudes forward from the front opening of the protective cylinder 40, the position of the cannula 14 is The movable unit 10) is used, that is, a position used to puncture the cannula 14 into a patient's vein or the like.

  As is clear from FIG. 5, the front end surface of the mounting ring 22 of the operating body 18 fixed to the hub 16 is integrally formed at the rear portion of the protective cylinder 40 in a state where the cannula 14 is located at the use position. By abutting against the rear end face of the engaging projecting portion 42, the advance of the canula 14 from the use position is prevented.

  In addition, in this manner, in a state where the cannula 14 is located at the use position and the forward movement is prevented, as shown in FIGS. The engaging claws 36a and 36b of 32a and 32b enter the left and right windows 52a and 52b of the engaging projecting portion 42, respectively, and engage the engaging connecting portions 50a and 50b of the engaging projecting portion 42, respectively. Is engaged. This prevents the cannula 14 from retreating from the use position. Thus, the movable unit 10 is fixed to the holder 12 so that the canula 14 is prevented from moving in the front-rear direction at the use position. As is apparent from this, the engaging means is constituted by the engaging connecting portions 50a and 50b of the engaging projecting portion 42 here. Note that, when the movable unit 10 is fixed at the position where the cannula 14 is used, the operation portions 34a and 34b of the engagement arms 32a and 32b are separated from the left and right side surfaces of the cover member 60 by a predetermined distance. Predetermined gaps 72 a and 72 b are formed between the operation portions 34 a and 34 b and the left and right side surfaces of the cover member 60 at the opposing positions.

  In the winged needle assembly according to the present embodiment, particularly, as described above, the cannula 14 is located at the use position, and the engagement arms 32a with respect to the engagement connection portions 50a and 50b of the engagement protrusion 42 are provided. 32b, the engagement portion 36a, 36b of the lock member 62 is folded in half as shown in FIGS. Thus, the base portion 68 of the locking body 64 is disposed so as to overlap the cover member 60. At the same time, the two locking projections 70 a and 70 b projecting from the base portion 68 are engaged with the left and right side surfaces of the cover member 60 and the engagement connecting portions 50 a and 50 b of the engagement projecting portion 42. In the gaps 72a and 72b between the operating portions 34a and 34b of the two engaging arms 32a and 32b, both the left and right sides of the operating portions 34a and 34b of the engaging arms 32a and 32b and the projecting portion 42 for engagement. The surface is rushed into contact with each surface. The base portion 68 is overlapped with the cover member 60, so that the amount of protrusion of the locking protrusions 70a and 70b into the gaps 72a and 72b is restricted.

  Thereby, each engagement arm 32a, 32b is latched by the latching protrusion 70a, 70b located inside them, and the bending deformation (elastic deformation) to the mutual approach direction is prevented. Therefore, unless the locking projections 70a and 70b are detached from the gaps 72a and 72b, the engaging claws 36a of the engaging arms 32a and 32b with respect to the engaging connecting portions 50a and 50b of the engaging protruding portion 42 are provided. , 36b is not released. That is, the engagement of the engagement arms 32a and 32b with the engagement connecting portions 50a and 50b of the engagement protrusion 42 is locked.

  In addition, here, the thickness of the locking projections 70a and 70b is larger than the width of the gaps 72a and 72b between the operation portions 34a and 34b of the engagement arms 32a and 32b and the left and right side surfaces of the cover member 60. It has been enlarged. Therefore, the locking protrusions 70a and 70b are bent and deformed in a direction away from each other by a dimension corresponding to the difference between the thickness of the locking protrusions 70a and 70b and the width of the gaps 72a and 72b. As a result, the locking projections 70a and 70b are press-fitted into the gaps 72a and 72b, and the left and right sides of the operating portions 34a and 34b of the engaging arms 32a and 32b and the protruding portions 42 for engagement. The pressure is held between the walls. Thus, unnecessary detachment of the locking projections 70a and 70b from the gaps 72a and 72b is prevented, so that the engagement arms 32a and 32b with respect to the engagement connection portions 50a and 50b of the engagement protrusion 42 are provided. Unnecessary release of the engagement of the engaging claws 36a and 36b is prevented.

  In the winged needle assembly of the present embodiment, the locking projections 70a and 70b are intentionally detached from the gaps 72a and 72b, so that the engaging protrusions 42 are engaged with the engaging connecting portions 50a and 50b. The locked state of engagement of the engagement arms 32a and 32b is canceled for the first time. In this state, the operation portions 34a and 34b (engagement claw portions 36a and 36b) of the engagement arms 32a and 32b are bent and deformed so as to approach each other, whereby the engagement connecting portion of the engagement protruding portion 42 is obtained. The engagement claws 36a and 36b of the respective engagement arms 32a and 32b with respect to 50a and 50b are disengaged. Thus, the backward movement of the canula 14 (movable unit 10) from the use position is allowed.

  In this winged needle assembly, the slider 26 of the operating body 18 is guided by the guide member 44 while the cannula 14 (movable unit 10) is in a state in which the cannula 14 is allowed to move backward from the use position. As shown in FIGS. 14 and 15, only the front end portion including the blade edge 20 of the cannula 14 is accommodated in the protective cylinder 40 by being moved backward. The position is the storage position of the cannula 14 (movable unit 10).

  As can be seen from FIG. 15, the rear end surface of the slider 26 comes into contact with a stopper portion 54 provided at the rear end of the guide member 44 in a state where the cannula 14 is located in such a storage position. Further retreat from the storage position of the cannula 14 is prevented.

  Further, in this manner, the engagement claw portion 28 provided on the slider 26 is located on the front side of the stopper portion 54 of the guide member 44 under the state where the cannula 14 is located at the storage position and the backward movement is prevented. The forward movement of the cannula 14 from the storage position is prevented. When the cannula 14 is retracted, the sliding surface 30 of the engaging claw 28 of the slider 26 slides on the inclined guide surface 58 of the engaging piece 56, and at that time, the engaging piece 56 is bent upward and deformed. As a result, the engagement claw portion 28 of the slider 26 is overcome. Therefore, in addition to the operation of retracting the cannula 14 to the storage position, the engagement claw portion 28 and the engagement claw portion 28 are not subjected to any special operation for engaging the engagement claw portion 28 and the engagement piece 56. The cannula 14 can be held in the storage position by engaging the engaging piece 56 easily and smoothly. In the present embodiment, holding means for holding the cannula 14 in the retracted storage position is configured by the engaging mechanism of the engaging claw portion 28 and the engaging piece 56.

  And the needle | hook assembly with a wing | blade of this embodiment is assembled as follows.

  That is, first, as shown in FIGS. 1 to 5, the engagement claws 36 a and 36 b of the two engagement arms 32 a and 32 b in the movable unit 10 are placed in the holder 12 with the cannula 14 positioned at the use position. The engaging projections 42 are engaged with the engaging connecting portions 50a and 50b. Then, the connecting portion 66 of the lock member 62 is folded in half so that the base portion 68 is overlapped with the cover member 60, and the two engaging projections 70a and 70b provided on the base portion 68 are engaged with the engaging arms 32a and 32b. Into the gaps 72a and 72b between the left and right side surfaces of the cover member 60, and the engagement state of the two engagement arms 32a and 32b with respect to the engagement connecting portions 50a and 50b is locked. As a result, the movable unit 10 is fixed to the engaging projecting portion 42 of the holder 12 so as to prevent forward and backward movement along the axial direction from the use position of the cannula 14. Since the engagement claws 36a and 36b of the engagement arms 32a and 32b are provided with sliding surfaces 38a and 38b, the cannula 14 is inserted into the protective cylinder 40, and the movable unit 10 is moved to the holder 12. When the movable unit 10 is simply moved forward, the sliding surfaces 38a and 38b of the engaging claw portions 36a and 36b slide on the engaging connecting portions 50a and 50b, respectively. The claw portions 36a and 36b are engaged with the engagement connecting portions 50a and 50b.

  Next, when performing infusion or blood transfusion or the like for a patient or the like using the winged needle assembly of the present embodiment assembled in this manner, the operation is advanced according to the following procedure, for example.

  As shown in FIG. 16, the two wing portions 46a and 46b of the fixing wing 48 are picked with fingers, and the fixing wing 48 is bent and deformed so as to be folded in two, thereby holding the winged needle assembly. To do. In this state, the front end portion including the cutting edge 20 of the cannula 14 is punctured into a patient's vein or the like. Thereafter, the two wing portions 46a and 46b are expanded, and the fixing wing 48 is fixed to the patient's body surface with tape or the like.

  At this time, the fixing wing 48 and the two engagement arms 32a and 32b of the operating body 18 of the movable unit 10 are positioned close to each other. Therefore, the two engaging arms 32a and 32b may be touched at the same time as the wings 46a and 46b of the fixing wing 48 are picked. Moreover, the direction of the force applied to the fixing wing 48 to bend and deform it, and the two engaging arms 32a and 32b are bent and deformed to engage the engaging connecting portion of the engaging protrusion 42. In order to release the engagement of the respective engagement arms 32a and 32b with respect to 50a and 50b, the acting direction of the force applied to the two engagement arms 32a and 32b is the same direction. Nevertheless, in the winged needle assembly of the present embodiment, the two engaging arms 32a and 32b are bent and deformed in the direction of releasing the engagement with the engaging connecting portions 50a and 50b. This is prevented by the locking of the locking member 62.

  When the infusion or blood transfusion to the patient is completed, as shown in FIG. 14, the lock member 62 is inserted into the gaps 72 a and 72 b between the engagement arms 32 a and 32 b and the left and right side surfaces of the cover member 60. The two locking projections 70a and 70b are detached, and the locked state of the engagement of the two engaging arms 32a and 32b with respect to the engaging connecting portions 50a and 50b is canceled. Thereafter, the operation portions 34a and 34bb of the two engagement arms 32a and 32b are bent and deformed, and the engagement claws 36a and 36b of the engagement arms 32a and 32b are engaged with the engagement connecting portions 50a and 50b. To release. In this state, for example, the movable unit 10 is moved backward until the cannula 14 is located at the storage position while pressing the fixing blade 48 so that the holder 12 does not move. Accordingly, the movable unit 10 is fixed to the guide member 44 of the holder 12 in a state where the front end portion including the blade edge 20 of the cannula 14 is housed in the protective cylinder 40 and protected without being exposed to the outside.

  Thus, in the winged needle assembly of the present embodiment, the engagement of the two engagement arms 32a and 32b with respect to the engagement connection portions 50a and 50b is engaged unless the lock by the lock member 62 is intentionally released. The arms 32a and 32b are prevented from being bent and deformed, whereby the state where the cannula 14 is located at the use position and cannot be moved back and forth can be stably maintained.

  Therefore, by using such a winged needle assembly, the puncture operation of the cannula 14 into the patient's vein or the like can be performed stably and reliably at all times. And as a result, the treatment which performs infusion, blood transfusion, etc. to a patient etc. using a winged needle assembly can be performed more smoothly and safely.

  Further, in the needle assembly with wings of the present embodiment, the locking body 64 of the lock member 62 is coupled to the cover member 60 that the holder 12 has integrally through the coupling portion 66. Therefore, unlike the case where the lock member 62 is formed of a member separate from the holder 12, the number of parts of the holder 12, and thus the entire winged needle assembly can be reduced, and the lock member 62 is lost. Thus, it becomes possible to prevent the locking of the engagement of the two engagement arms 32a and 32b with respect to the engagement connecting portions 50a and 50b from being disabled.

  In the winged needle assembly of the present embodiment, the base portion 68 of the locking body 64 is overlapped with the cover member 60, whereby the operation portions 34a and 34b of the two engagement arms 32a and 32b and the cover member 60 are overlapped. The operating portions 34a and 34b are locked to the locking projections 70a and 70b in a state where the amount of the locking projections 70a and 70b entering the gaps 72a and 72b between the left and right side surfaces of the locking projections 70a and 70b is restricted. It has become so. Therefore, when locking the engagement of the two engagement arms 32a and 32b with the coupling portions 50a and 50b for engagement, the locking projections 70a and 70b are inserted into the gaps 72a and 72b to By superimposing the base portion 68 on the cover member 60, the operation portions 34a, 70a, 70b with respect to the locking projections 70a, 70b can be obtained without confirming the amount of the protrusions 70a, 70b entering the gaps 72a, 72b. The sufficient locking state of 34b can be reliably realized by a simple operation.

  As mentioned above, although embodiment of this invention was explained in full detail, it is an illustration to the last, Comprising: This invention is not interpreted limitedly by the specific description in such embodiment.

  For example, in the above-described embodiment, the engagement arms 32a and 32b are engaged with the engagement connecting portions 50a and 50b in a state where the engagement arms 32a and 32b are not bent and deformed, and the engagement arms 32a and 32b are bent and deformed so as to approach each other. Although the engagement with the joint connecting portions 50a and 50b was released, the engaging arms 32a and 32b were engaged with the engaging connecting portions 50a and 50b in a state of being bent and deformed. It can also be configured such that the engagement with the engagement connecting portions 50a and 50b is released by being restored from the bending deformation state.

  That is, for example, as illustrated in FIG. 17, the hub 16 is configured so that the operation portions 34 a and 34 b of the two engagement arms 32 a and 32 b are separated from the rear ends of the rearward extending portions 24 a and 24 b. A portion extending a predetermined length diagonally forward and a portion extending a predetermined length toward the front of the hub 16 so as to approach each other from the tip of the extended portion. Configure with shape. Then, the engaging claws 36a and 36b are integrally formed at the tips of the operation portions 34a and 34b.

  In the winged needle assembly having the two engaging arms 32a and 32b having such a structure, when the cannula 14 is located at the use position, as shown by a two-dot chain line in FIG. The combined arms 32a and 32b are not engaged with the engaging connecting portions 50a and 50b in a state before being bent and deformed. Then, the locking projections 70a and 70b respectively enter the gaps 72a and 72b between the engagement arms 32a and 32b and the left and right side surfaces of the cover member 60, so that the engagement arms 32a and 32b are mutually connected. It bends and deforms in the direction of separation. As a result, as shown in FIGS. 3 and 4, the engagement arms 32a and 32b engage with the engagement connecting portions 50a and 50b, and such engagement is locked. Thus, the movable unit 10 is fixed so as to be immovable in the front-rear direction with respect to the holder 12 in a state where the cannula 14 is located at the use position.

  Further, in this winged needle assembly, the locking projections 70a and 70b are detached from the gaps 72a and 72b, and the locking of the engagement of the two engaging arms 32a and 32b with respect to the engaging connecting portions 50a and 50b is released. At the same time, the engagement arms 32a and 32b are restored from the bending deformation without applying any acting force, and the engagement of the two engagement arms 32a and 32b with the engagement connecting portions 50a and 50b is performed. It will be released.

  Therefore, the winged needle assembly according to the present embodiment does not perform any operation on the engaging arms 32a and 32b by simply disengaging the locking protrusions 70a and 70b from the gaps 72a and 72b after use. In addition, the cannula 14 can be brought into a state in which it can move backward.

  Therefore, when the winged needle assembly of this embodiment is used, the operation of protecting the front end including the cutting edge 20 of the cannula 14 by positioning the cannula 14 in the storage position after use is more easily performed. To get.

  In the two embodiments, when the cannula 14 (movable unit 10) is located at the use position, the two engagement arms 32a and 32b are positioned on both the left and right sides with the holder 12 (engagement protrusion 42) interposed therebetween. The movable unit 10 is provided so that one piece is located at a time. However, the number and position of the engagement arms are not particularly limited thereto. For example, one or three or more of the engagement arms may be provided at a position other than the exemplified position of the movable unit. When the formation position of the engagement arm is changed, the formation position of the engagement means engaged with the engagement arm and the structure and formation position of the lock means engaged with the engagement arm are appropriately changed accordingly. Changed to

  Moreover, you may connect the latching body 64 of the lock member 62 as a locking means to the movable unit 10 (for example, hub 16) via the connection part 66. FIG. Further, the connecting portion 66 is omitted, and the locking member 62 is separated from the holder 12 by only the locking body 64 having the base portion 68 and the locking projections 70a and 70b or the locking projection 70. It can also be constituted by a member.

  The locking structure of the locking means with respect to the engaging arm is not limited to the illustrated structure. For example, if realization is possible, there is no problem even if the engaging arm is locked to a surface opposite to the direction of bending deformation to restrict the bending deformation of the engaging arm.

  In addition, although not listed one by one, the present invention can be implemented in a mode with various changes, modifications, improvements, and the like based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the invention.

It is upper surface explanatory drawing which shows one Embodiment of the winged needle assembly which has a structure according to this invention. It is side surface explanatory drawing of the needle | hook assembly with a wing | blade shown by FIG. FIG. 2 is a bottom view of the winged needle assembly shown in FIG. 1. FIG. 4 is a partially enlarged explanatory view of FIG. 3. It is the elements on larger scale in the VV cross section of FIG. FIG. 2 is a top view for explaining a movable unit included in the winged needle assembly shown in FIG. 1. It is side surface explanatory drawing of the movable unit shown by FIG. FIG. 7 is an explanatory bottom view of the movable unit shown in FIG. 6. It is the elements on larger scale in the IX-IX cross section of FIG. It is upper surface explanatory drawing of the holder which the winged needle | hook assembly shown by FIG. 1 has. It is side surface explanatory drawing of the holder shown by FIG. It is bottom surface explanatory drawing of the holder shown by FIG. It is the elements on larger scale in the XIII-XIII cross section of FIG. It is explanatory drawing which shows an example of the use condition of the winged needle assembly shown by FIG. 1, Comprising: The movable unit is located in the accommodation position, and the state fixed to the guide member is shown. It is the elements on larger scale in the XV-XV cross section of FIG. It is explanatory drawing which shows another example of the use condition of the winged needle assembly shown in FIG. 1, Comprising: The wing | blade for fixing is picked and the state which punctures a cannula etc. is shown. FIG. 15 is a view corresponding to FIG. 14 showing another embodiment of a winged needle assembly having a structure according to the present invention.

Explanation of symbols

10: movable unit, 12: holder, 14: cannula, 16: hub, 18: operating body, 26: slider, 32: engagement arm, 36: engagement claw, 40: protective cylinder, 42: projection for engagement Part 44: guide member 48: fixing blade 50: engagement connecting part 56: engagement piece 60: cover member 62: lock member 64: locking body 70: locking projection

Claims (8)

A movable unit provided with a hub at the rear end of the cannula having a cutting edge at the front end and provided with a flexible engagement arm with respect to the hub;
A protective cylinder through which the cannula is inserted; a use position in which a front portion of the cannula protrudes from a front end opening of the protective cylinder; and a front end including the blade edge of the cannula is housed in the protective cylinder A holder for holding the movable unit movably in the axial direction between the storage position and
A flexible fixing wing provided on the holder;
It is provided so as to extend in the axial direction of the canula with respect to the rear portion of the holder, and guides the movement of the movable unit between the use position and the storage position, and moves the movable unit to the storage position. A guide member having holding means for holding;
The engagement arm is releasably engaged, and the movable unit can be fixed to the use position by the engagement of the engagement arm, while the movable arm can be fixed by releasing the engagement arm. The fixing of the unit can be released, and the engaging means provided on the holder and the engaging arm can be locked and detached, and the locking of the engaging arm by the locking to the engaging arm. The engagement arm is locked in an engaged state with respect to the engagement means by restricting the bending deformation, and the engagement arm is allowed to be deformed by detachment from the engagement arm, and the engagement arm is engaged. Locking means for releasing the locked state of engagement with the coupling means;
A winged needle assembly comprising: The engagement arm is adapted to be engaged with the engagement means based on the elasticity of the engagement arm, and an external force is applied to the engagement arm to bend and deform against the elasticity. The engagement of the engagement arm with the engagement means is released,
The locking means is removably locked with respect to the engagement arm, so that bending deformation against the elasticity of the engagement arm is restricted, and the engagement state of the engagement arm with the engagement means The winged needle assembly according to claim 1, wherein the wing is locked.   An input direction of an external force applied to the engaging arm to bend and deform the engaging arm and an input direction of a force applied to the fixing wing to bend and deform the fixing wing are in the same direction. The winged needle assembly according to claim 2, wherein the engaging arm and the fixing wing are provided for the movable unit and the holder, respectively. The engagement arm is held in an elastically deformed state by the locking action of the lock means with respect to the engagement arm, and the engagement arm is engaged and locked with the engagement means.
2. The winged needle assembly according to claim 1, wherein the engagement means is elastically restored by releasing the lock means from the engagement arm so that the engagement with the engagement means is released.   When the movable unit is located at the use position, two engagement arms are provided for the movable unit so that one engagement arm is located on each side of the holder. Item 5. The winged needle assembly according to any one of Items 1 to 4.   A locking body that engages with the engagement arm so as to enter between the flexure-deformed engagement arm and the holder and prevent the engagement arm from restoring from the flexure deformation is provided with the lock means. And the latching body is clamped between the engagement arm and the holder based on the restoring force of the engagement arm, whereby the latching body is engaged with the engagement arm. The winged needle assembly according to any one of claims 1 to 5, wherein the stop is maintained.   In a state where the locking body is displaceable between a position where the locking body is locked to the engagement arm and a position where the locking to the engagement arm is released, the locking body is moved to the movable unit and the holder. The winged needle assembly according to claim 6, wherein the lock means further has a connecting portion connected to any one of the above.   The locking body has a base portion and a locking protrusion protruding from the base portion, and the locking protrusion enters between the engaging arm and the holder which are bent and deformed, While being held between the engagement arm and the holder, the base is in contact with at least one of the engagement arm and the holder while being locked to the engagement arm. The winged needle assembly according to claim 6 or 7, wherein an amount of the locking protrusion entering between the engagement arm and the holder is restricted.

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