Winged needle assembly, packaging material for winged needle assembly, cap body for winged needle assembly, and winged needle assembly set

Abstract

A winged needle assembly that is an example of an embodiment according to the present invention is provided with: a needle hub, to which the base end of a needle is fixed and on which a locking part is formed; a housing, which supports the needle hub at a first position at which the needle protrudes from the tube tip; a spring, which biases the needle hub towards the base end of the housing; wings provided on the housing; and an erroneous operation-inhibiting part for inhibiting erroneous operation of an erroneous puncture-preventing mechanism.

Description

[Technical Field]

[0001] The present invention relates to a winged needle assembly, a packaging material for a winged needle assembly, a cap body for a winged needle assembly, and a winged needle assembly set, and more particularly to a winged needle assembly equipped with an anti-puncture mechanism that uses a spring to store the needle tip within a housing. [Background technology]

[0002] Conventionally, winged needle assemblies with wings have been used when injecting medicinal solutions into patients, or when performing procedures such as artificial dialysis and blood collection. The wings are generally made of flexible resin and are used to secure the assembly to the patient's arm or other area with tape after the needle has been inserted, and are also used during the insertion of the needle. Winged needle assemblies with various structures are known, and for example, winged needle assemblies equipped with a puncture prevention mechanism have also been developed. Patent Document 1 discloses a winged needle assembly equipped with a puncture prevention mechanism in which the needle tip is housed within a housing by sliding the needle hub to which the needle is fixed toward the proximal end. A mechanism for locking the sliding of the needle hub is also provided to prevent the needle housed within the housing from re-extinguishing.

[0003] The winged needle assembly of Patent Document 1 comprises a needle hub with a locking portion formed thereon, a cylindrical housing that slidably supports the needle hub, a spring that biases the needle hub toward the proximal end, and a wing provided at the distal end of the housing. The housing has an opening into which the locking portion of the needle hub fits, and is provided with a flexible plate including a pressing protrusion that faces the opening. In this winged needle assembly, by pressing the flexible plate after use, the locking portion of the needle hub is pushed inward and disengaged from the opening of the housing. At this time, the biasing force of the spring causes the needle hub to slide toward the proximal end, and the needle tip is housed within the housing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-89070 Summary of the Invention [Problem to be solved by the invention]

[0005] In a winged needle assembly, when inserting the needle into a patient's blood vessel, the wing is generally grasped. However, when grasping the wing, the flexible plate of the housing may be accidentally pressed, causing the needle tip to retract into the housing and locking the needle hub. Therefore, there is a need to prevent such malfunction. On the other hand, when intentionally manipulating the flexible plate, it is necessary to ensure the same good operability as in the past.

[0006] Another challenge for the winged needle assembly is to achieve stable and rapid puncture operation. Because the operating winged needle assembly is required to be small, some users may find it difficult to grasp the wings, preventing them from quickly proceeding with the puncture operation.

[0007] An object of the present invention is to solve at least one of the above problems. [Means for solving the problem]

[0008] The winged needle assembly according to one aspect of the present invention is a winged needle assembly equipped with a needle puncture prevention mechanism, comprising: a needle hub to which the base end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing which supports the needle hub in a first position where the needle protrudes from the tip of the barrel; a spring which biases the needle hub toward the base end of the housing; wings provided on the housing; and a malfunction prevention unit which prevents malfunction of the puncture prevention mechanism. The housing has an engaged portion to which the locking portion engages when the needle hub is in the first position, and an operating portion which presses the engaging portion, and the malfunction prevention unit is characterized in that the malfunction prevention unit is a wall portion located between the wing and the operating portion or between the wing and the engaged portion, a wall portion which covers part of the operating portion, an inhibiting portion provided on the wing which inhibits the wing from bending inside the locking portion, or an inhibiting portion which is attached detachably or movable relative to the housing and inhibits displacement or pressing of the operating portion.

[0009] The winged needle assembly of one aspect of the present invention is a winged needle assembly equipped with a needle puncture prevention mechanism, comprising: a needle hub to which the base end of the needle is fixed and which has a locking portion formed; a cylindrical housing supporting the needle hub, the housing having an operating portion which locks the locking portion at a first position of the needle hub where the needle protrudes from the tip of the tube and which disengages the locking portion when pressed; a spring which biases the needle hub toward the base end of the housing; wings provided on the housing; and a malfunction suppression portion which suppresses malfunction of the puncture prevention mechanism, wherein the malfunction suppression portion is a wall portion located between the wing and the operating portion, a wall portion which covers part of the operating portion, an inhibiting portion provided on the wing and which inhibits the wing from bending inside the locking portion, or an inhibiting portion which is attached detachably or movable relative to the housing and inhibits displacement of the operating portion or pressing operation.

[0010] As described above, during the puncture operation, the wings on the housing are gripped, but at this time, the operating unit may be accidentally pressed, causing the needle tip to retract into the housing and lock the needle hub. With the above configuration, the malfunction prevention unit can prevent the malfunction of the mis-puncture prevention mechanism. Meanwhile, intentional pressing of the operating unit can be easily performed by avoiding the malfunction prevention unit.

[0011] One aspect of the present invention is a winged needle assembly equipped with a needle puncture prevention mechanism, comprising: a needle hub to which the base end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing supporting the needle hub and having a locking portion at which the locking portion locks when the needle protrudes from the cylindrical tip of the needle hub; a spring that biases the needle hub toward the base end of the housing; wings attached to the housing; and a malfunction suppression unit that suppresses malfunction of the puncture prevention mechanism, wherein the malfunction suppression unit is a wall portion located between the wing and the locking portion, an inhibiting unit attached to the wing and preventing the wing from bending further inward than the locking portion, or an inhibiting unit attached detachably or movably relative to the housing and inhibiting pressing of the locking unit. In this case, too, the malfunction suppression unit suppresses malfunction of the puncture prevention mechanism, and intentional pressing of the locking unit can be easily performed by avoiding the malfunction suppression unit.

[0012] In the winged needle assembly of one aspect of the present invention, the malfunction prevention section is a protruding wall formed on the outer circumferential surface of the housing between the locked section or the operating section and the wing, and protruding beyond the tip of the locking section. Because the protruding wall protrudes beyond the tip of the locking section, the protruding wall protrudes a large amount, and during a puncture operation in which the wing is grasped, the protruding wall acts as a barrier, for example, to effectively prevent unintentional pressing of the operating section.

[0013] In one aspect of the winged needle assembly of the present invention, the wings include a pair of wings extending in a direction perpendicular to the axial direction of the housing, and a tubular portion to which the pair of wings are connected and fitted onto the housing, and the malfunction suppression section is provided on the tubular portion of the wing and extends to a position that overlaps at least with the tip of the locking section in the axial direction of the housing. In this case too, during a puncture operation in which the wings are gripped, the malfunction suppression section provided on the tubular portion of the wing acts as an obstacle, effectively suppressing unintentional pressing of the operating section.

[0014] One aspect of the present invention is a winged needle assembly equipped with a needle puncture prevention mechanism, comprising a needle hub to which the proximal end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing that supports the needle hub in a first position where the needle protrudes from the cylindrical tip; a spring that biases the needle hub toward the proximal end of the housing; and wings attached to the housing. The housing has a locking portion that locks with the locking portion when the needle hub is in the first position, and an operating portion that presses the locking portion from the outside of the housing, the operating portion being a flexible piece extending from the wing side of the housing toward the proximal end. During a puncture operation, the wing attached to the housing is gripped, but in this configuration, the free end of the flexible piece extending from the wing side toward the proximal end is separated from the wing, making it less likely that the flexible piece will be unintentionally pressed during the puncture operation. This reduces the risk of malfunction of the puncture prevention mechanism.

[0015] The packaging material for a winged needle assembly, which is one aspect of the present invention, is a packaging material used for a winged needle assembly having a needle, a tubular body to which the needle is fixed, and a pair of wings provided on the body, and is characterized by being configured to come into contact with the pair of wings so that the pair of wings are raised up facing the same direction.

[0016] With the above configuration, the pair of wings of the winged needle assembly are held upright by the packaging material, facing in the same direction, allowing the pair of wings to be stably grasped when performing a puncture operation. During puncture, the pair of wings are held in a state where they are bent in the same direction, but with the above configuration, this state is already formed by the packaging material, allowing the medical professional to stably and quickly grasp the wings. Therefore, with the above configuration, a more stable and quick puncture operation is possible.

[0017] In a packaging material for a winged needle assembly according to one aspect of the present invention, the packaging material may comprise a case body that houses the winged needle assembly, and a pair of holders that are erected on the bottom of the case body and abut against the pair of wings to cause the pair of wings to stand facing in the same direction and that hold the winged needle assembly in between. In this case, for example, the case body can protect the entire winged needle assembly, and the wings can be gripped stably and quickly during a puncture operation.

[0018] In one aspect of the present invention, the cap body for a winged needle assembly includes a base portion that abuts against a pair of wings to raise the pair of wings in the same direction, and a cap portion that extends from the tip of the base and houses the needle. In this case, because the wings are raised in the same direction by the cap body, medical personnel can stably and quickly grasp the wings, allowing them to quickly proceed to the puncture operation. Furthermore, this facilitates guidance to the procedure of removing the cap that covers the needle tip while grasping the pair of wings, thereby reducing the risk of accidental puncture. Furthermore, because the base portion and cap portion are integrated, the operation of removing the cap portion while the pair of wings is stably grasped can be more reliably performed.

[0019] In the cap body for a winged needle assembly according to one aspect of the present invention, the base may have an opening for allowing the pair of wings to extend outside the cap body, and a tongue portion extending from the edge of the opening to press the winged needle assembly. In this case, the winged needle assembly is pressed by the tongue portion, and the cap body is, for example, firmly and stably attached to the winged needle assembly.

[0020] In one aspect of the present invention, the winged needle assembly set comprises a needle hub to which the base end of the needle is fixed, a spring located at the tip side of the needle hub and compressed to generate a biasing force to move the needle hub towards the base end of the assembly, an operating part that releases the compression of the spring, and a cylindrical housing that accommodates the needle after the spring is released.

[0021] The packaging material for a winged needle assembly, which is one aspect of the present invention, is suitable for a winged needle assembly equipped with an accidental puncture prevention mechanism that uses a spring and an operating part to house the needle tip within a housing. As described above, the puncture operation is performed while gripping the pair of wings. However, when gripping the wings by bending them, the wings or fingers may unintentionally come into contact with the operating part, which may cause the accidental puncture prevention mechanism to malfunction. With the above configuration, the pair of wings are already in an upright position facing the same direction, making it less likely that an accidental puncture will occur, thereby effectively preventing the accidental puncture prevention mechanism from malfunctioning. [Effects of the Invention]

[0022] According to one aspect of the present invention, in a winged needle assembly equipped with an accidental puncture prevention mechanism that uses a spring to house the needle tip within a housing, it is possible to prevent malfunction of the accidental puncture prevention mechanism while ensuring good operability. Also, according to one aspect of the present invention, stable and fast puncture operations using the winged needle assembly are possible. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view of a winged needle assembly according to a first embodiment. [Figure 2] FIG. 1 is an exploded perspective view of a winged needle assembly according to a first embodiment. [Figure 3] FIG. 1 is a cross-sectional view of a winged needle assembly of a first embodiment. [Figure 4] FIG. 1 is a perspective view of the winged needle assembly of the first embodiment, showing a state in which the needle tip is housed in the cylindrical housing. [Figure 5] FIG. 5 is a cross-sectional view of the state shown in FIG. [Figure 6] FIG. 2 is a diagram showing a puncture operation using the winged needle assembly of the first embodiment. [Figure 7] FIG. 10 is a perspective view of a winged needle assembly according to a second embodiment. [Figure 8] 10A and 10B are diagrams for explaining the configuration of a malfunction suppression section in a winged needle assembly of a second embodiment. [Figure 9] FIG. 10 is a diagram showing a modified example of the second embodiment. [Figure 10] FIG. 10 is a perspective view of a winged needle assembly according to a third embodiment. [Figure 11] FIG. 10 is a perspective view of a stopper that constitutes a winged needle assembly of a third embodiment. [Figure 12] FIG. 10 is a diagram showing a modified example of the third embodiment. [Figure 13] FIG. 1 is a perspective view of a winged needle assembly set according to a first embodiment. [Figure 14] FIG. 1 is an exploded perspective view of a winged needle assembly set according to a first embodiment. [Figure 15] FIG. 1 is a cross-sectional view of a winged needle assembly set according to a first embodiment. [Figure 16] FIG. 1 is a perspective view of a winged needle assembly according to a first embodiment. [Figure 17] FIG. 1 is a perspective view of a packaging material for a winged needle assembly according to a first embodiment. [Figure 18] FIG. 2 is a diagram showing a puncture operation using the winged needle assembly of the first embodiment. [Figure 19] FIG. 10 is a perspective view of a winged needle assembly set according to a second embodiment. [Figure 20] FIG. 10 is a cross-sectional view of a winged needle assembly set according to a second embodiment. [Figure 21] FIG. 10 is a plan view showing a modified example of a winged needle assembly. DETAILED DESCRIPTION OF THE INVENTION

[0024] An example of an embodiment of a winged needle assembly according to the present invention will be described in detail below with reference to the drawings. The embodiment described below is merely an example, and the present invention is not limited to the following embodiment. Furthermore, it is originally anticipated that the components of the multiple embodiments and modified examples described below may be selectively combined.

[0025] [Winged needle assembly] First Embodiment A winged needle assembly 10 according to a first embodiment will be described in detail with reference to Figures 1 to 6. Figure 1 is a perspective view of the winged needle assembly 10, and Figure 2 is an exploded perspective view of the winged needle assembly 10. Figure 3 is a cross-sectional view of the winged needle assembly 10 taken along the axial direction of the housing 30 at a portion where the flexible piece 36 is formed.

[0026] As shown in Figures 1 to 3, the winged needle assembly 10 comprises a needle 11, a needle hub 20 to which the proximal end of the needle 11 is fixed, and a cylindrical housing 30 that houses the needle hub 20. The housing 30 supports the needle hub 12 at a first position where the needle 11 protrudes from the cylindrical tip. The housing 30 also supports the needle hub 20 in a state where it can slide from the first position to a second position where the needle 11 is housed within the cylindrical housing. The winged needle assembly 10 has a structure in which the needle hub 20 to which the needle 11 is fixed is inserted into the cylindrical housing 30 so as to be axially movable. The winged needle assembly 10 also comprises a spring 12 that biases the needle hub 20 toward the proximal end of the housing 30, and wings 13 provided on the housing 30.

[0027] In this embodiment, a tube 100 is connected to the base end of the needle hub 20. In this specification, the tip side of the winged needle assembly 10 refers to the needle tip 11a side of the needle 11, and the base end side of the winged needle assembly 10 refers to the side opposite the needle tip 11a to which a pipe such as the tube 100 is connected. Furthermore, for ease of explanation, the direction in which the wing portions 14 of the wings 13 extend will be referred to as the "left-right direction," and the direction perpendicular to the left-right direction and the longitudinal direction (axial direction) of the needle 11 will be referred to as the "up-down direction."

[0028] The winged needle assembly 10 is equipped with an accidental puncture prevention mechanism that uses a spring 12 to house the needle 11 within the housing 30. As a component of the accidental puncture prevention mechanism, a locking portion 23 is formed on the needle hub 20. The housing 30 has, as locked portions to which the locking portion 23 of the needle hub 20 is locked, a first opening 34 with which the locking portion 23 of the needle hub 20 is locked at a first position of the needle hub 20 where the needle 11 protrudes from the tip of the housing 30, and a second opening 35 with which the locking portion 23 is locked at a second position of the needle hub 20 where the needle 11 is housed within the housing 30. The housing 30 also has a flexible piece 36 as an operating portion that presses the locking portion 23. A spring 12 is disposed within the housing 30 to bias the needle hub 20 toward the base end.

[0029] The winged needle assembly 10 is used with the locking portion 23 of the needle hub 20 fitted into the first opening 34 of the housing 30 and the needle 11 protruding from the tip of the housing 30. After use, the locking portion 23 fits into the second opening 35, and the needle 11 is housed within the housing 30. As will be described in detail below, when the flexible piece 36 is pressed after use, the pressing protrusion 37 of the flexible piece 36 pushes the locking portion 23, which is fitted into the first opening 34, toward the inside of the housing 30 and disengages from the first opening 34. At this time, the urging force of the spring 12 causes the needle hub 20 to slide toward the base end, and the needle 11 is housed within the housing 30, and the locking portion 23 fits into the second opening 35, locking the sliding of the needle hub 20.

[0030] Below, each component of the winged needle assembly 10, particularly the configuration of the housing 30, will be described in detail.

[0031] [Needle hub, needle, spring] 1 to 3, the needle 11 is a hollow needle made of a metal such as stainless steel, has a sharp needle tip 11a that allows for puncture, and is fixed to the distal end of the needle hub 20. The proximal end of the needle 11 is inserted into the needle hub 20 from the distal end of the needle hub 20, and the hollow part of the needle 11 communicates with the internal flow path of the needle hub 20. The length of the needle 11 is shorter than the axial length of the housing 30, and the entire needle 11 is housed within the cylindrical housing 30 after use.

[0032] The needle hub 20 is a cylindrical member to which the needle 11 is fixed, and is housed within the housing 30 while being biased toward the base end of the housing 30 by a spring 12. The needle hub 20 is formed in a generally cylindrical shape overall, and has a diameter that allows it to be inserted into the housing 30. The needle hub 20 is made of, for example, a hard resin. A flow path for passing medicinal solutions and blood is formed within the needle hub 20, and as described above, this flow path communicates with the hollow portion of the needle 11. The internal flow path of the needle hub 20 is narrow at the tip end and wide at the base end, and also communicates with the hollow portion of the tube 100.

[0033] The needle hub 20 has a large diameter portion 21 with a larger outer diameter formed closer to the base end than the axial center portion, and a small diameter portion 22 with a smaller outer diameter formed closer to the tip end. A pair of locking portions 23 are also formed in the axial center portion of the needle hub 20. In this embodiment, the pair of locking portions 23 extend from the outer circumferential surface at the boundary between the large diameter portion 21 and the small diameter portion 22. A flange portion 24 that protrudes radially is formed on the needle hub 20 closer to the tip end than the locking portions 23. The flange portion 24 is an annular convex portion formed along the circumferential direction of the needle hub 20 (small diameter portion 22), and the spring 12 abuts against the flange portion 24. The locking portion 23 may be separate from the tubular portion of the needle hub 20, or a separate locking portion may be attached to the tubular portion.

[0034] A compression spring is used as the spring 12 that biases the needle hub 20 toward the base end of the housing 30. The spring 12 is, for example, a compression coil spring in which a metal wire is wound in a spiral shape, and presses the flange portion 24 of the needle hub 20 toward the base end. The spring 12 is fitted onto the small diameter portion 22 from the tip of the needle hub 20, and is disposed within the housing 30 in a compressed state by the flange portion 24 and an annular portion 41 (see Figure 3) formed at the tip of the housing 30.

[0035] Furthermore, the needle hub 20 is formed with a ridge portion 25 extending from the flange portion 24 to the base end. The ridge portion 25 is a convex portion formed by a portion of the outer peripheral surface of the needle hub 20 protruding in the radial direction, and is formed along the axial direction of the needle hub 20. For example, a pair of ridge portions 25 are formed on the top and bottom of the needle hub 20. A step 26 is formed in the ridge portion 25 at a portion sandwiched between the pair of locking portions 23, and the height of the ridge portion 25 is higher on the base end side than the step 26.

[0036] A groove (not shown) is formed inside the cylinder of housing 30, into which the portion of ridge 25 closer to the base end than step 26 fits. The uneven structure of this groove and ridge 25 guides movement of needle hub 20 along the axial direction of housing 30, and the step portion of ridge 25 abuts against the tip of the groove, restricting movement of needle hub 20 toward the tip side.

[0037] As described above, the locking portions 23 are portions that fit into the opening of the housing 30 and extend from the outer peripheral surface of the needle hub 20. One locking portion 23 is formed on each of the left and right sides of the needle hub 20, and extends from the axial center of the needle hub 20 toward the tip. The pair of locking portions 23 are inclined with respect to the axial direction of the needle hub 20 so that the distance between them gradually increases from the base toward the tip.

[0038] The tip ends of the pair of locking portions 23 are bent outward and protrude to the left and right so as to easily catch on the openings of the housing 30. The locking portions 23 are also configured to be elastically deformable in the radial direction (left and right direction) of the needle hub 20. That is, the pair of locking portions 23 are elastically deformable so that the distance between them changes. The locking portions 23 are disposed within the housing 30 in a state where they are slightly compressed radially inward, for example.

[0039] [Housing Wing] As shown in Figures 1 to 3, the housing 30 is a tubular member that houses the needle hub 20, and is formed into a substantially cylindrical shape overall. In this embodiment, the distal end of the needle hub 20 protrudes from an opening 33a on the distal side of the housing 30, and the proximal end of the needle hub 20 protrudes from an opening 33b on the proximal side of the housing 30. In other words, the length of the housing 30 is slightly shorter than the length of the needle hub 20. The housing 30 is made of, for example, a hard resin.

[0040] The cross section of the distal end portion of the housing 30 is substantially circular, and the cross section of the proximal end portion is substantially elliptical with a major axis along the left-right direction. The proximal end of the housing 30 has a large diameter section 31 with a large outer diameter, and the distal end has a small diameter section 32 with a small outer diameter, with the length of the large diameter section 31 being greater than the length of the small diameter section 32. A pair of first openings 34, a pair of second openings 35, and a pair of flexible pieces 36 are formed on both the left and right sides of the large diameter section 31. Furthermore, a protruding wall 40 is formed distally of the first opening 34 as a malfunction prevention section that prevents malfunction of the puncture prevention mechanism due to incorrect operation of the flexible pieces 36.

[0041] Wings 13 are attached to the housing 30 closer to the tip than the protruding wall 40. The wings 13 are made of, for example, a flexible rubber member, and are used when performing a puncture operation and also when fixing the winged needle assembly 10 to the patient's arm or the like using tape. The wings 13 include a pair of wing sections 14 extending in the left-right direction perpendicular to the axial direction of the housing 30, and a tubular section 15 to which the bases of the wings 14 are connected, and are attached to the housing 30 by fitting the tubular section 15 onto the small diameter section 32 of the housing 30. The wing sections 14 extend significantly to both the left and right from the lower end of the tubular section 15, beyond the left and right ends of the flexible piece 36, and are formed wider at their tips than at their bases.

[0042] The upper end of the small-diameter portion 32 of the housing 30 is formed with a ridge 39 extending from the protruding wall 40 toward the tip, and the upper end of the tubular portion 15 of the wing 13 is formed with a recess 16 into which the ridge 39 fits. This uneven structure determines the circumferential position of the wing 13 relative to the housing 30. The housing 30 also has an annular portion 41 that protrudes toward the center of the opening 33a and is formed in an annular shape along the periphery of the opening 33a. As described above, the spring 12 is disposed in a compressed state between the flange portion 24 of the needle hub 20 and the annular portion 41. This provides a biasing force that slides the needle hub 20 toward the base end of the housing 30.

[0043] The first openings 34 are formed on both the left and right sides of the distal end of the large diameter portion 31, penetrating the cylindrical wall. The first openings 34 are latched portions into which the latching portion 23 of the needle hub 20 fits when the needle 11 is in the use state in which the needle 11 protrudes from the distal end of the housing 30 (i.e., the first position of the needle hub 20), and are formed with a size that allows the distal end of the latching portion 23 to be inserted. The distal end of the latching portion 23 latches onto the base end edge of the first openings 34. The pair of first openings 34 are formed, for example, with the same size and rectangular shape.

[0044] The cylindrical wall of the housing 30 has a left-right inner diameter that is smaller than the distance between the pair of locking portions 23 at a portion adjacent to the base end side of the first opening 34. In this case, the pair of locking portions 23 are compressed radially inward, so that the needle hub 20 is stably fixed to the housing 30.

[0045] The second openings 35 are formed on both the left and right sides at the base end of the large diameter portion 31, penetrating the cylindrical wall. The second openings 35 are locked portions into which the locking portions 23 of the needle hub 20 fit when the needle 11 is housed in the housing 30 (i.e., when the needle hub 20 is in the second position), and are formed with a size that allows the distal ends of the locking portions 23 to be inserted. The pair of second openings 35 are formed, for example, in a rectangular shape and of the same size, similar to the first openings 34, and the distal ends of the locking portions 23 are caught on the proximal edge of the second openings 35.

[0046] The cylindrical wall of the housing 30 is formed with an inclined wall portion 38 that is inclined with respect to the axial direction so as to gradually widen radially outward toward the base end. The inclined wall portions 38 are formed on both the left and right sides from the axial center of the large diameter portion 31 to the edge of the second opening 35. The edge on the tip side of the second opening 35 is located radially outward from the edge on the base end side. In this case, when the needle hub 20 slides toward the base end due to the biasing force of the spring 12, the locking portion 23 is more reliably guided into the second opening 35.

[0047] The flexible pieces 36 are operating parts that are operated when inserting the needle 11 into the housing 30, and are formed in the shape of arms extending from the outer circumferential surface of the large diameter portion 31. One flexible piece 36 is formed on each side of the housing 30, extending from the axial center of the large diameter portion 31 toward the tip. The pair of flexible pieces 36 are inclined with respect to the axial direction of the housing 30 so that the distance between them gradually increases from the base to the tip, and extend to a position facing the first opening 34. Note that a spring may be provided between the flexible pieces 36 and the outer circumferential surface of the housing 30 to inhibit the displacement or pressing operation of the operating part, but this has the disadvantage of complicating the configuration, and increasing the spring constant to enhance the suppression function increases the pressing force required for operation.

[0048] The pair of flexible pieces 36 are configured to be elastically deformed in the radial direction (left-right direction) of the housing 30. A pressing protrusion 37 that protrudes in the direction of the first opening 34 is formed at the tip of each flexible piece 36. The pressing protrusions 37 are arranged facing each other at a predetermined distance outward from the first opening 34 in the radial direction of the housing 30, and when the flexible pieces 36 are pressed, they press the locking portion 23 of the needle hub 20 that fits into the first opening 34. Note that the operating portion that presses the locking portion 23 is not limited to the flexible pieces 36, and for example, the operating portion may be a member that is separate from the tubular portion of the housing 30 and rotatably attached via a pin or the like.

[0049] As described above, the housing 30 is formed with the protruding wall 40 as a malfunction prevention section that prevents the malfunction of the puncture prevention mechanism due to erroneous operation of the flexible piece 36. The protruding wall 40 is a wall section that is located between the wing 13 and the flexible piece 36 in the axial direction of the housing 30, in other words, between the wing 13 and the first opening 34, and protrudes in a direction intersecting the axial direction of the housing 30. The protruding wall 40 is formed in a plate shape, and its thickness is set to a small extent that it does not deform or break when pressed during a puncture operation, for example, from the perspective of miniaturizing the device.

[0050] The protruding wall 40 protrudes in the left-right direction of the pair of flexible plates 36, close to the tips of the flexible plates 36, at a position that does not overlap the flexible plates 36 in the left-right direction. By providing such a protruding wall 40, the protruding wall 40 acts as a barrier during the puncture operation, preventing unintentional pressing of the flexible plates 36. On the other hand, because the protruding wall 40 does not overlap the flexible plates 36 in the left-right direction, it does not get in the way when intentionally pressing the flexible plates 36, and good operability of the flexible plates 36 is ensured, as in the past.

[0051] The protruding wall 40 is formed on the outer peripheral surface of the housing 30 between the wing 13 and the first opening 34, and protrudes beyond the tip of the locking portion 23 that fits into the first opening 34. The protruding wall 40 is formed adjacent to the wing 13 and the first opening 34 so as to separate them. One protruding wall 40 is formed on each of the left and right sides of the housing 30, and they are formed to have the same length. The pair of protruding walls 40 extend parallel to each other in the left-right direction (the direction in which the pair of flexible pieces 36 are aligned).

[0052] The protruding wall 40 may extend obliquely in the left-right direction so as to gradually approach the flexible piece 36 toward the tip of the protruding wall 40, within a range that does not interfere with the flexible piece 36. Alternatively, the protruding wall 40 may extend obliquely in the left-right direction so as to gradually move away from the flexible piece 36 toward the tip of the protruding wall 40, within a range that can suppress malfunction of the flexible piece 36. Furthermore, the protruding wall 40 may be separate from the tubular portion of the housing 30, or a separate protruding wall may be attached to the tubular portion.

[0053] The protruding walls 40 overlap the locking portions 23 in the axial direction of the housing 30 (see FIG. 3). In this embodiment, the protruding walls 40 also extend to the left and right so that the pressing protrusions 37 of the flexible pieces 36 and the tips of the protruding walls 40 overlap in the axial direction of the housing 30. The length in the left-right direction from the tip of one protruding wall 40 to the tip of the other protruding wall 40 is greater than the major axis of the large diameter portion 31. Note that the pair of protruding walls 40 may extend to the left and right beyond both the left and right ends of the flexible piece 36. However, from the viewpoints of miniaturization of the device, operability during puncture, etc., it is preferable that the length extend beyond the tip positions of the locking portions 23 but not beyond both the left and right ends of the flexible piece 36.

[0054] The protruding wall 40 protrudes only in the left-right direction from the outer peripheral surface of the housing 30, and does not substantially protrude in the up-down direction. The vertical length of the protruding wall 40 is, for example, the same as the vertical length of the large diameter portion 31. In particular, since the protruding wall 40 does not protrude downward beyond the outer peripheral surface of the large diameter portion 31, it does not get in the way when securing the device to the patient's arm. Furthermore, the distal edge of the protruding wall 40 preferably has a rounded curved shape without corners, because its lower portion may come into contact with the patient's skin and its upper portion may come into contact with the user's fingertips holding the winged needle assembly 10. The shape of the protruding wall is not limited to a thin plate-like shape. For example, it may be fan-shaped, with the left-right dimension decreasing toward the needle tip. It is preferable that the portion of the housing distal to the protruding wall has a larger left-right width and a larger width-to-height ratio than the portion of the housing where the protruding wall is located.

[0055] 4 and 5 are views showing the state in which the needle tip 11a is housed within the cylindrical housing 30. As shown in Figures 4 and 5, with the winged needle assembly 10 having the above-described configuration, the needle 11 can be housed within the housing 30 after use, preventing accidental punctures by the needle 11. After a procedure such as infusion or blood collection is completed, when the pair of flexible pieces 36 are pressed with the needle 11 still inserted into the patient's blood vessel, the pressing protrusions 37 of the flexible pieces 36 press the tip of the locking portion 23 of the needle hub 20 fitted in the first opening 34 into the inside of the housing 30, causing the locking portion 23 to elastically deform and the tip of the locking portion 23 to disengage from the first opening 34.

[0056] Because the needle hub 20 is biased toward the proximal end of the housing 30 by the spring 12, when the locking portion 23 disengages from the first opening 34, the needle hub 20 slides toward the proximal end from the first position, and the needle 11 fixed to the distal end of the needle hub 20 also slides toward the proximal end and is housed within the housing 30. Then, the locking portion 23 undergoes restoration deformation as it moves toward the proximal end of the housing 30, and the distal end of the locking portion 23 enters the second opening 35 and gets caught on the proximal edge of the second opening 35. When the distal end of the locking portion 23 engages with the second opening 35, the slide is locked so that the needle hub 20 cannot move from the second position, and the needle 11 is prevented from re-exterminating. This allows the winged needle assembly 10 to be safely disposed of.

[0057] When the pair of flexible pieces 36 are pressed to house the needle 11 in the housing 30, the longitudinal center of each flexible piece 36 is generally pressed from the left and right, so the protruding wall 40 formed on the tip side of the housing 30 beyond the flexible pieces 36 does not interfere with this operation. In other words, with the winged needle assembly 10, good operability of the flexible pieces 36 is ensured, just like in conventional devices.

[0058] Figure 6 is a diagram showing the state of the puncture operation using the winged needle assembly 10 having the above-mentioned configuration. As shown in Figure 6, when inserting the needle 11 into a patient's blood vessel, the pair of wings 14 are bent upward and overlapped and grasped. That is, the pair of wings 14 are bent upward and overlapped so as to sandwich the cylindrical portion 15 of the wing 13, and grasped, and the needle 11 is inserted into the patient's blood vessel.

[0059] At this time, particularly when the base of the wing portion 14 is grasped, it is expected that a finger will catch on the flexible leaf 36 and accidentally press the flexible leaf 36, but with the winged needle assembly 10, the protruding wall 40 protrudes significantly from a position close to the tip of the flexible leaf 36, and the protruding wall 40 acts as a barrier, effectively preventing accidental operation of the flexible leaf 36. Therefore, with the winged needle assembly 10, it is possible to prevent malfunction of the accidental puncture prevention mechanism due to accidental operation of the flexible leaf 36. In particular, in winged indwelling needles that use a spring to house the needle tip within the housing, winged indwelling needles are required to be small, making it difficult to make the housing long in the axial direction. As a result, the point where the spring is pressed is located toward the tip of the housing, i.e., closer to the wing, but in that case, it is easy to accidentally operate the flexible leaf 36 when grasping the wing, etc. However, by forming the protruding wall 40, it is possible to make it difficult to accidentally operate the flexible piece 36 when grasping the wing, etc., and it is possible to reduce the size while suppressing malfunction of the puncture prevention mechanism.

[0060] Second Embodiment A winged needle assembly 50 according to a second embodiment will now be described in detail with reference to Figures 7 to 9. Figure 7 is a perspective view of the winged needle assembly 50, and Figure 8 is a plan view of the winged needle assembly 50, showing an enlarged view of the malfunction suppression member 51 and its vicinity. In the following, the same or similar components as those in the first embodiment will be designated by the same reference numerals, and redundant explanations will be omitted.

[0061] 7 and 8, the winged needle assembly 50, like the winged needle assembly 10, comprises a needle 11, a needle hub 20, and a housing 30. The winged needle assembly 50 also comprises a spring 12 (not shown in FIGS. 7 and 8) and wings 13. On the other hand, the winged needle assembly 50 differs from the winged needle assembly 10 in that the housing 30 does not have a protruding wall 40, and a malfunction prevention member 51 is provided on the cylindrical portion 15 of the wing 13 to prevent malfunction of the puncture prevention mechanism due to incorrect operation of the flexible piece 36.

[0062] The malfunction prevention member 51 is an inhibitor provided on the wing 13 that inhibits the wing portion 14 from bending radially inward of the housing 30 relative to the locking portion 23, and may be detachably attached to the tubular portion 15 or may be joined using an adhesive or the like. The malfunction prevention member 51 is a semi-cylindrical member that curves along the outer circumferential surface of the tubular portion 15 and covers the top and both left and right sides of the tubular portion 15. As shown in Figure 6, the wing portion 14 is grasped during the puncture operation, but with the winged needle assembly 50, by attaching the malfunction prevention member 51 to the tubular portion 15 and thickening the base portions of the wing portion 14 on the left and right, the thick base portions act as an obstacle to inhibit the erroneous operation of the flexible piece 36.

[0063] The root portions of the wings 13, including the cylindrical portion 15 and the malfunction prevention member 51, i.e., the portions surrounding the outer peripheral surface of the small-diameter portion 32 of the housing 30, are formed thicker on both left and right sides than on the lower portions. In this embodiment, the malfunction prevention member 51, which is a semi-cylindrical member having a substantially constant thickness, is attached to a portion of the cylindrical portion 15 located above the wing portions 14, so that the root portions of the wings 13 are formed thicker except for the lower portions. If the thickness of the lower portions of the root portions, which together with the wing portions 14 form the underside of the wings 13, were increased, the inserted needle 11 would put a strain on the blood vessel. Therefore, by thickening the left and right sides without increasing the thickness of the lower portions, such a problem can be prevented and the erroneous operation of the flexible pieces 36 can be effectively suppressed.

[0064] When attached to the tubular portion 15, the malfunction prevention member 51 preferably extends to the left and right to a position where it overlaps at least the tip of the locking portion 23 that fits into the first opening 34 in the axial direction of the housing 30 (see FIG. 8). In this embodiment, the left and right ends of the malfunction prevention member 51 and the tips of the pair of locking portions 23 are aligned in the axial direction of the housing 30. During the puncture operation, the pair of wings 14 are folded upward and held together, so the base portions of the wings 14 become even thicker and extend out to the left and right beyond the tips of the locking portions 23.

[0065] In the winged needle assembly 50, the thicker the malfunction prevention member 51, the greater the effect of preventing the flexible piece 36 from being erroneously operated, but it is preferable to set the thickness taking into consideration the weight of the device, etc. The malfunction prevention member 51 may be of any length so long as it does not interfere with the flexible piece 36, and may be formed to the same length as the tubular portion 15. The malfunction prevention member 51 may be formed with protrusions (wall portions) that protrude to the left and right, like the stopper 61 described below, and the malfunction prevention member 51 may also protrude to the left and right in the axial direction of the housing 30 to a position where it overlaps with the pressing protrusion 37.

[0066] 9 is a perspective view of a winged needle assembly 55, which is a modified example of the winged needle assembly 50. The winged needle assembly 55 has in common with the winged needle assembly 50 the malfunction suppression section being provided on the wing 13. On the other hand, the winged needle assembly 55 differs from the winged needle assembly 50 in that the tubular section and the malfunction suppression section are integrated together. That is, the winged needle assembly 55 is provided with a malfunction suppression tubular section 56 that extends out to the left and right to a position that overlaps at least the tip of the locking section 23 that fits into the first opening 34 and the axial direction of the housing 30.

[0067] The malfunction prevention tube portion 56 is formed with a recess 16 into which the protruding rib portion 39 of the housing 30 fits. The malfunction prevention tube portion 56, which is the base portion of the wings 13, is thicker at the top and on both the left and right sides than at the bottom, and the upper end of the tube portion protrudes upward beyond the outer circumferential surface of the large diameter portion 31 of the housing 30. The malfunction prevention tube portion 56 may also protrude to the left and right beyond the outer circumferential surface of the large diameter portion 31. With the winged needle assembly 55, as with the winged needle assembly 50, the thick base portions of the wings 14 act as obstacles to prevent the flexible piece 36 from being erroneously operated during the puncture operation.

[0068] It should be noted that the wing 14 may be provided with an inhibiting portion that inhibits the wing 14 from bending radially inward of the housing 30 relative to the locking portion 23. The inhibiting portion is, for example, a plate-like member attached to the upper surface of the wing 14, and increases the thickness of the wing 14 near its base to increase its rigidity. However, the thickness may be thin as long as the member is highly rigid. It is also possible to increase the rigidity of the wing 14 by forming the base of the wing 14 thick. By increasing the rigidity of the wing 14 near its base, it is possible to realize a configuration in which the wing bends with the boundary between the high-rigidity and low-rigidity portions as the inflection point.

[0069] Third Embodiment A winged needle assembly 60 according to a third embodiment will now be described in detail with reference to Figures 10 to 12. Figure 10 is a perspective view of the winged needle assembly 60, and Figure 11 is a perspective view of the stopper 61. In the following, the same or similar components as those in the first and second embodiments will be designated by the same reference numerals, and redundant explanations will be omitted.

[0070] As shown in Figure 10, the winged needle assembly 60, like the winged needle assemblies 10 and 50, comprises a needle 11, a needle hub 20, and a housing 30. The winged needle assembly 60 also comprises a spring 12 (not shown in Figure 10) and wings 13. On the other hand, the winged needle assembly 60 differs from the winged needle assemblies 10 and 50 in that it comprises a stopper 61, which serves as an error prevention section and is movably or detachably attached to the outer peripheral surface of the housing 30.

[0071] The stopper 61 is an inhibiting part that inhibits the displacement or pressing operation of the flexible piece 36, which is the operating part. It is detachably attached to the outer peripheral surface of the housing 30 and is interposed between the outer peripheral surface and the flexible piece 36. That is, the stopper 61 is attached to a part of the outer peripheral surface of the housing 30 that is located inside the flexible piece 36. In this case, during the puncturing operation, the stopper 61 acts as an obstacle, restricting the inward movement of the flexible piece 36 and preventing contact between the pressing protrusion 37 and the locking part 23. Therefore, even if the flexible piece 36 is accidentally pressed, the puncture prevention mechanism will not malfunction. Furthermore, by removing the stopper 61, the flexible piece 36 can be pressed in the same way as before.

[0072] As shown in Figures 10 and 11, the stopper 61 has a semi-cylindrical base 62 that curves to fit the outer peripheral surface of the housing 30 and covers the upper portion and both left and right sides of the housing 30, and a pair of protrusions 63 that protrude from the base 62 on both left and right sides. The base 62 is fitted onto the large-diameter portion 31 of the housing 30. The protrusions 63 are formed in a position that overlaps the flexible plate 36 in the left-right direction. The protrusions 63 have a generally triangular shape whose protrusion length gradually increases toward the tip of the flexible plate 36. In this case, the area that contacts the inner surface of the flexible plate 36 is increased, preventing unintended removal of the stopper 61. The protrusions 63 are formed to a length that prevents the pressing protrusions 37 from pressing the locking portion 23 when the flexible plate 36 is pressed.

[0073] The stopper 61 has a pair of gripping portions 64 that extend upward from both the left and right sides of the base 62. The gripping portions 64 are formed over the entire length of the base 62 and are slightly curved so that their tips are positioned slightly outward from the base. By pinching the pair of gripping portions 64 from the outside and pressing them inward, the lower end side of the base 62 can be spread apart, making it easy to remove the stopper 61 from the housing 30.

[0074] In this embodiment, the base 62 is configured to be elastically deformable in the left-right direction, has an inner diameter slightly smaller than the outer diameter of the large diameter portion 31, and is attached while pressing against the outer circumferential surface of the large diameter portion 31. Note that the stopper 61 is configured to be easily deformed, and therefore is not disposed between the engaging portion 23 and the pressing protrusion 37. The stopper does not have to have the pair of gripping portions 64, and may be removable without grasping the gripping portions 64 from the outside.

[0075] 12 is a perspective view of a winged needle assembly 65, which is a modified example of the winged needle assembly 60. The winged needle assembly 65 is similar to the winged needle assembly 60 in that it is provided with a stopper 66 attached to the outer circumferential surface of the housing 30x as an erroneous operation suppression section. However, the winged needle assembly 65 differs from the winged needle assembly 60 in that it is configured so that the stopper 66 does not need to be removed even when the flexible piece 36 is pressed to store the needle 11 in the housing 30x.

[0076] Like stopper 61, stopper 66 has a semi-cylindrical base 67 fitted onto the large diameter portion 31x of housing 30x, and a gripping portion 68 extending from base 67. Base 67 is configured to be elastically deformable in the left-right direction, has an inner diameter slightly smaller than the outer diameter of large diameter portion 31, and is attached in a state where it presses against the outer circumferential surface of large diameter portion 31. Grip 68 extends upward from the upper end of base 67. Stopper 66 does not have protrusions protruding to the left or right, and in the example shown in FIG. 12 , stopper 66 is attached to a portion of the outer circumferential surface of housing 30x that is located inside flexible piece 36, covering locking portion 23 fitted into first opening 34.

[0077] A recess 69 for accommodating the stopper 66 is formed on the outer peripheral surface of the housing 30x. The recess 69 is a portion of the outer peripheral surface of the large diameter portion 31x that is located inside the flexible piece 36 and is formed closer to the base end than the first opening 34. The recesses 69 are formed, for example, by cutting out both left and right portions of the cylindrical wall of the large diameter portion 31x, one on each side, with a size that allows the base 67 of the stopper 66 to fit into. The recesses 69 are formed with a depth corresponding to the thickness of the base 67.

[0078] When the stopper 66 fits into the recess 69, it bends inward, reducing its outer diameter. Even in this state, it is preferable that a pressing force be applied to the outer peripheral surface of the large diameter portion 31. For example, the large diameter portion 31x may be formed with a second recess shallower than the recess 69 so that the stopper 66 does not move from its initial mounting position, or a locking mechanism may be provided to fix the stopper 66 after it has moved. Furthermore, the axial length of the stopper 66 may be shortened so that the stopper 66 can press the tip end side of the flexible piece 36 without being bent inward.

[0079] With the winged needle assembly 65, when the flexible piece 36 is pressed to house the needle 11 in the housing 30x, the stopper 66 can be moved to the recess 69, making it possible to press the flexible piece 36 without removing the stopper 66 from the housing 30x. This eliminates the need to remove the stopper 66 and dispose of it separately as trash, improving user convenience.

[0080] The above-described embodiments may be modified in design as appropriate without departing from the scope of the present invention. For example, although the malfunction suppression units in the above-described embodiments are provided on both the left and right sides, they may be provided on only one side.

[0081] In the first embodiment, the malfunction prevention unit may be a wall portion that covers a portion of the operating unit. One example is a wall portion that protrudes laterally from the large-diameter portion 31 of the housing 30 and covers the upper portion of the pressing protrusion 37 of the flexible piece 36. The wall portion overlaps a portion of the operating unit in the vertical direction but does not overlap the operating unit in the horizontal direction. Therefore, intentional pressing of the operating unit can be easily performed by avoiding the wall portion. Note that the wall portion functioning as the malfunction prevention unit only needs to reduce the possibility of the locking portion being disengaged from the locked portion, and the wall portion does not need to extend to cover the upper portion of the pressing protrusion 37 of the flexible piece 36. Furthermore, the wall portion is not limited to a wall that protrudes perpendicular to the axis of the housing. It may also be a wall that extends axially between the operating unit and the locking portion, or the wall portion may extend from a member that constitutes a wing. For example, a wall portion extending from the tubular portion toward the base end may be provided. This wall portion allows the finger to hit the operating part unintentionally when gripping the wing, so that the finger will hit the wall portion before the locking part is released, thereby alerting the user and reducing the risk of the locking part being released unintentionally.

[0082] In the second embodiment, the malfunction suppression portion is formed on the tubular portion located at the center of the pair of wings, but it may be formed only on the wing portions. Alternatively, a protrusion extending radially outward from the outer surface of the tubular portion may be provided to restrict the bending of the wing. For example, a protrusion extending in the left-right direction from the top surface of the tubular portion may be provided, or the tubular portion may be shaped so that its width in the left-right direction increases from the top surface to the bottom surface. Furthermore, the inflection point of the bending of the wing may be positioned as desired by molding the wings using different materials, providing multiple linear protrusions, or providing linear ribs.

[0083] In the third embodiment, a stopper having a semi-cylindrical base attached to the outer peripheral surface of the housing 30 was exemplified as an inhibiting portion that inhibits the displacement or pressing operation of the operating portion, but the inhibiting portion may also be a movable or removable cap body that covers the entire operating portion. The inhibiting portion may be a completely cylindrical body as long as it covers the operating portion. Alternatively, the inhibiting portion may be a movable or removable cap body that covers a part of the operating portion (for example, the pressing protrusion 37 of the flexible piece 36). It may also be a movable or removable cap body that covers the locking portion.

[0084] Furthermore, the operating portion may extend from the vicinity of the wing 13 toward the base end, or as shown in JP 2011-200599 A, the operating portion and the locked portion may be provided on the top surface of the housing rather than on the left and right sides. In this case, a protruding wall may be disposed on the top surface of the housing between the locked portion and the wing. The direction in which the operating portion extends is not particularly limited, and the number and shape of the operating portions are also not limited to those in the above-described embodiment.

[0085] As shown in International Publication No. 2017 / 033449 (FIG. 12), the housing may have an operating part that engages a locking part at a first position of the needle hub where the needle protrudes from the nozzle and disengages the locking part when pressed. That is, the operating part also functions as a locked part. In this case, the above-described malfunction suppression part can be applied, and unintentional pressing of the operating part can be effectively suppressed. Furthermore, as shown in JP-A-2007-521080 (FIG. 14), the housing may have a locked part that engages a locking part at a first position of the needle hub and does not have an operating part. In this case, the above-described malfunction suppression part can be applied, and unintentional pressing of the locking part can be effectively suppressed.

[0086] [Winged needle assembly set] First Embodiment The winged needle assembly set 1 of the first embodiment will be described in detail with reference to Figures 13 to 18. Figure 13 is a perspective view of the winged needle assembly set 1, Figure 14 is an exploded perspective view of the winged needle assembly set 1, and Figure 15 is a cross-sectional view of the winged needle assembly set 1.

[0087] As shown in Figures 13 to 15, the winged needle assembly set 1 comprises a winged needle assembly 101 and a case 500 attached to the winged needle assembly 101. The winged needle assembly 101 comprises a needle 110 having a cutting surface at its tip, a cylindrical main body to which the needle 110 is fixed, and a pair of wings 140 provided on the main body. In this embodiment, the main body of the winged needle assembly 101 is made up of a needle hub 200 to which the base end of the needle 110 is fixed, and a cylindrical housing 300 that supports the needle hub 200. The pair of wings 140 are made up of separate members from the housing 300 and are attached to the tip of the housing 300.

[0088] In this embodiment, a tube 100 (see FIG. 15) is connected to the base end of the needle hub 200. In this specification, the tip side of the winged needle assembly 101 refers to the needle tip 110a side of the needle 110, and the base end side of the winged needle assembly 101 refers to the side opposite the needle tip 110a to which a pipe such as the tube 100 is connected. For ease of explanation, the direction in which the wing portion 140 extends will be referred to as the "left-right direction," and the direction perpendicular to the left-right direction and the longitudinal direction (axial direction) of the needle 110 will be referred to as the "up-down direction." Furthermore, terms indicating directions such as up-down, left-right, and the like will also be used in the case 500.

[0089] The case 500 is a cap body used for the winged needle assembly 101 and is removed when puncturing. In other words, the case 500 is a type of packaging material that covers the winged needle assembly 101 and is attached to the winged needle assembly 101 in a storage state until puncturing. The case 500 is formed into a cylindrical shape that can accommodate the winged needle assembly 101 as a whole, and is attached so as to cover most of the winged needle assembly 101 from the needle tip 110a to the base end of the housing 300. On the other hand, the pair of wings 140 extend outside the case 500, and most of them are not covered by the case 500 except for the vicinity of their bases. As will be described in detail later, the case 500 is configured to abut against the pair of wings 140 and to cause the pair of wings 140 to stand up facing the same direction.

[0090] The winged needle assembly set 1 has a structure in which the winged needle assembly 101 is inserted into the cylindrical case 500, and the pair of wings 140 protrude significantly outside the case 500. The pair of wings 140 stand approximately parallel to each other upward from the upper end of the case 500. The base end of the case 500 is open, and the winged needle assembly 101 is inserted through this opening. When performing a puncture operation, the pair of wings 140 are bent upward and grasped, but with the winged needle assembly set 1, this state is already formed by the case 500, so it is possible to stably and quickly grasp the pair of wings 140 when performing a puncture operation.

[0091] The winged needle assembly 101 and the case 500 that constitute the winged needle assembly set 1 will be described in detail below with reference to Figures 16 and 17 as needed.

[0092] [Winged needle assembly] Figure 16 is a perspective view of a winged needle assembly 101. As shown in Figures 13 to 16, the winged needle assembly 101 comprises a needle 110, a needle hub 200 to which the base end of the needle 110 is fixed, and a cylindrical housing 300 into which the needle hub 200 is inserted. The housing 300 supports the needle hub 200 in a state in which it can slide from a first position in which the needle 110 protrudes from the tip of the barrel to a second position in which the needle 110 is housed within the barrel. The winged needle assembly 101 has a similar structure to the winged needle assembly 10, except that it does not have the protruding wall 40, which is an erroneous operation suppression section. Therefore, the structure of the winged needle assembly 101 will be briefly described below.

[0093] The winged needle assembly 101 further includes a spring 120 located at the distal end of the needle hub 200, which, when compressed, generates a biasing force to move the needle hub 200 toward the proximal end of the housing 300, and an operating unit that releases the compression of the spring 120, thereby providing an accidental puncture prevention mechanism that accommodates the needle 110 within the housing 300 using the spring 120 and the operating unit. The housing 300 accommodates the needle 110 after the compression of the spring 120 is released. In this embodiment, the needle hub 200 is formed with a locking portion 230, and the housing 300 is formed with a first opening 340 with which the locking portion 230 engages when the needle hub 200 is at a first position, and a second opening 350 with which the locking portion 230 engages when the needle hub 200 is at a second position. The housing 300 also includes a flexible piece 360 ​​as the operating unit.

[0094] The needle hub 200 has a large diameter portion 210 with a larger outer diameter formed closer to the base end than the axial center portion, and a small diameter portion 220 with a smaller outer diameter formed closer to the tip. A pair of engaging portions 230 extend from the boundary between the large diameter portion 210 and the small diameter portion 220, and a flange portion 240 is formed closer to the tip than the locking portion 230. In this embodiment, the spring 120 is fitted onto the small diameter portion 220 from the tip of the needle hub 200, and is disposed within the housing 300 in a compressed state by the flange portion 240 and an annular portion 390 (see FIG. 15) formed at the tip of the housing 300.

[0095] The housing 300 is made of, for example, a hard resin, and has a cross section at the base end portion that is generally elliptical with a major axis along the left-right direction, and a cross section at the tip end portion that is generally circular, with the base end portion comprising a large-diameter portion 310 with a large outer diameter and the tip end portion comprising a small-diameter portion 32 with a small outer diameter. A pair of first openings 340, a pair of second openings 350, and a pair of flexible pieces 360 are formed on both the left and right sides of the large-diameter portion 310. A pressing protrusion 370 that protrudes toward the first opening 340 is formed at the tip end of each flexible piece 360.

[0096] As described above, the housing 300 is provided with a pair of wings 140. The wings 140 are used when fixing the winged needle assembly 101 to the patient's arm or the like with tape after the needle 110 has punctured the patient, and are also used when performing the puncture. The wings 140 are made of, for example, a flexible resin, and are attached to the tip of the housing 300. The pair of wings 140 extend widely to the left and right from the tip of the housing 300 beyond both the left and right ends of the flexible piece 360. The wings 140 have a shape that is wider at the tip than at the base, but the shape of the wings 140 is not particularly limited.

[0097] A cylindrical portion 150 is provided at the base of the pair of wings 140, and the pair of wings 140 are attached to the housing 300 by fitting this cylindrical portion 150 onto the small diameter portion 320 of the housing 300. That is, the pair of wings 140 are connected via the cylindrical portion 150 and attached to the small diameter portion 320. A protruding rib portion 380 extending toward the tip side is formed at the upper end of the small diameter portion 320, and a recessed portion 160 into which the protruding rib portion 380 fits is formed at the upper end of the cylindrical portion 150. This concave-convex structure determines the circumferential position of the wings 140 relative to the housing 300.

[0098] The pair of wings 140 are connected to the lower end of the tube portion 150 and extend laterally from the bottom of the small diameter portion 320. Because the pair of wings 140 are flexible, they can be bent at their bases so that their tips point upward, and as shown in Figure 18 described below, when performing puncturing, the pair of wings 140 bent upward are overlapped and grasped. Furthermore, because the wings 140 are elastically deformable, they return to their original shape when released.

[0099] [case] Fig. 17 is a perspective view of case 500. As shown in Figs. 13 to 15 and 17, case 500 has a first tubular portion 510 as a base that abuts against the pair of wing portions 140 and causes the pair of wing portions 140 to stand up facing the same direction. Case 500 also has a second tubular portion 520 that extends from the tip of first tubular portion 510. Second tubular portion 520 is a cap portion that houses needle 110. Case 500 is an integrally molded product made of, for example, hard resin, and the internal spaces of first tubular portion 510 and second tubular portion 520 are in communication with each other.

[0100] The case 500 has a shape corresponding to the shape of the winged needle assembly 101, with the first cylindrical portion 510 being larger in the left-right direction than the second cylindrical portion 520. The second cylindrical portion 520 is formed in a cylindrical shape with a perfectly circular cross section perpendicular to the longitudinal direction, and has a substantially constant diameter. On the other hand, the first cylindrical portion 510 is formed in a rectangular cylindrical shape that is longer in the left-right direction than in the up-down direction, with the left-right length (hereinafter sometimes referred to as "width") becoming shorter at the tip end closer to the second cylindrical portion 520. The up-down length of the first cylindrical portion 510 is equal to or slightly longer than the up-down length of the second cylindrical portion 520.

[0101] The second cylindrical portion 520 has a cylindrical shape with a closed end and a closed tip, and houses and protects the entire needle 110. As shown in Fig. 15, the inner diameter of the second cylindrical portion 520 is larger than the outer diameter of the small diameter portion 320 of the housing 300, and the tip of the small diameter portion 320 may be inserted into the second cylindrical portion 520. In this embodiment, the small diameter portion 320 is inserted into the second cylindrical portion 520 with the outer peripheral surface of the small diameter portion 320 abutting against the inner peripheral surface of the second cylindrical portion 520. This restricts movement of the winged needle assembly 101 in the up-down and left-right directions within the case 500, and the case 500 is stably attached to the winged needle assembly 101.

[0102] The engaging portion between the case 500 and the winged needle assembly 101 is not limited to the small diameter portion 320, but may be formed in another location. For example, the case 500 may engage with the tip of the needle hub. Alternatively, the winged needle assembly may engage with the peripheral edge of the lower cover portion 540 or upper opening 560, which will be described later. It is preferable that the engaging portion between the case 500 and the winged needle assembly 101 be formed closer to the tip than the wing portion, as this allows the case to be removed more stably.

[0103] The case 500 accommodates most of the winged needle assembly 101, excluding the pair of wings 140, from the needle tip 110a to the base end of the housing 300. The length of the case 500 is, for example, equal to or slightly longer than the length of the winged needle assembly 101. The second cylindrical portion 520 is formed to a length that prevents the needle tip 110a from hitting the inner surface of the bottom when the tip of the housing 300 is inserted into the cylinder. Note that the tip of the second cylindrical portion 520 may be open as long as the needle tip 110a does not protrude from the second cylindrical portion 520.

[0104] The length of case 500 may be shorter than winged needle assembly 101, and most of the base end side of housing 300 may protrude from case 500, but it is preferable that the operating parts such as the pair of flexible pieces 360 are covered by case 500. Because winged needle assembly 101 has an anti-puncture function, by covering flexible piece 360 ​​with case 500, it is possible to effectively prevent the flexible piece 360 ​​from being accidentally pressed during a puncture operation, etc., which would cause the anti-puncture mechanism to malfunction.

[0105] The first cylindrical portion 510 is a portion that raises the pair of wings 140, accommodates most of the housing 300 including the base portions of the pair of wings 140 and the flexible piece 360, and extends laterally beyond the left and right ends of the second cylindrical portion 520. As described above, the width of the first cylindrical portion 510 is smaller at the tip end side than at the base end side, and a reduced width portion 510a is formed on the tip end side of the first cylindrical portion 510. In this embodiment, the width of the reduced width portion 510a gradually decreases toward the tip end of the first cylindrical portion 510, but the first cylindrical portion 510 may be formed with a step that causes the width to change abruptly.

[0106] The first cylindrical portion 510 is formed with a wide portion 510b that is wider than the narrow portion 510a, extending from a portion corresponding to the tip end of the flexible pieces 360 to the base end. As shown in Fig. 15, the boundary between the narrow portion 510a and the wide portion 510b is located at a position that overlaps in the left-right direction with the tip ends of the pair of flexible pieces 360. The wide portion 510b has a distance (W1) between the inner surfaces that face each other in the left-right direction that is greater than the length (W2) along the left-right direction from the left end of the left flexible piece 360 ​​to the right end of the right flexible piece 360, and the first cylindrical portion 510 is formed so as not to come into contact with the flexible pieces 360.

[0107] The first cylindrical portion 510 includes a pair of side walls 530 that cover the sides of the housing 300, a lower cover portion 540 that covers the lower part of the housing 300, and an upper cover portion 550 that covers the upper part of the housing 300. The pair of side walls 530 are formed obliquely with respect to the axial direction of the first cylindrical portion 510 at the narrowed width portion 510a, and are formed parallel to the axial direction of the first cylindrical portion 510 at the widened width portion 510b. The pair of side walls 530 are disposed opposite each other at a distance (W1) greater than the length (W2) from the base end of the first cylindrical portion 510 to a position corresponding to the tip end of the flexible piece 360.

[0108] The lower cover portion 540 is formed in the left-right direction so as to connect the lower ends of the pair of side wall portions 530, and widely covers the lower surface of the housing 300. By providing the lower cover portion 540, the lower portion of the housing 300 is protected, and by connecting the pair of side wall portions 530, the mechanical strength of the case 500 is improved. Furthermore, the lower cover portion 540 may be formed with a recess 540a along the axial direction of the first cylindrical portion 510, into which the large diameter portion 310 of the housing 300 fits. The recess 540a functions, for example, as a guide when the case 500 is attached to the winged needle assembly 101.

[0109] The upper cover portion 550 extends inward in the left-right direction from the upper ends of the pair of side wall portions 530 and is formed approximately parallel to the lower cover portion 540. The upper cover portion 550 covers the upper part of the flexible piece 360 ​​of the housing 300, but does not substantially cover the upper surface of the large diameter portion 310. In other words, the upper surface of the large diameter portion 310 is not covered by the case 500 and is largely exposed. An upper opening 560 is formed in the first cylindrical portion 510, which exposes the upper surface of the large diameter portion 310. By forming the upper opening 560, the case 500 can be attached to the winged needle assembly 101 with the pair of wings 140 standing upright.

[0110] The upper opening 560 is formed in a generally rectangular shape in plan view along the axial direction of the case 500, from the base end of the first cylindrical portion 510 to the vicinity of the second cylindrical portion 520. Furthermore, the upper opening 560 is formed, for example, with a width slightly larger than the width of the cylindrical portion 150 to which the pair of wing portions 140 are connected. Since the pair of wing portions 140 are bent at their bases (the connection portions with the cylindrical portion 150), in this case, the pair of wing portions 140 that are bent upward and stand up can easily extend straight out from the upper opening 560. Furthermore, a pair of upper cover portions 550 are formed on both the left and right sides of the upper opening 560, with the same width.

[0111] In this embodiment, the pair of erected wings 140 abut against the tip edge 560a of the upper opening 560. This restricts movement of the winged needle assembly 101 toward the tip side of the case 500. The upper opening 560 is formed, for example, with a length that allows the tip of the housing 300 to be inserted into the second tubular portion 520 when the wings 140 abut against the tip edge 560a. The side edge 560b of the upper opening 560 (the inner end edge of the upper cover portion 550) is formed linearly along the axial direction of the case 500 and abuts against the surfaces of the pair of erected wings 140 that face outward in the left-right direction. In other words, the side edge 560b supports the pair of erected wings 140 from the outside, maintaining the erected state of the wings 140.

[0112] The first tubular portion 510 is formed with a tongue portion 570 extending from the distal edge portion 560a of the upper opening 560 toward the proximal end. The tongue portion 570 extends to cover the upper portion of the tubular portion 150 and may be in contact with the upper surface of the tubular portion 150. In this case, the tongue portion 570 presses the tubular portion 150 of the housing 300 from above, ensuring, for example, that the case 500 is securely and stably attached. The vertical distance between the tongue portion 570 and the lower cover portion 540 is equal to or slightly smaller than the vertical length of the tubular portion 150. In addition, grooves 580 are formed between the tongue portion 570 and the side edges 560b, through which the upstanding wings 140 can be inserted. The grooves 580 are formed on both the left and right sides of the tongue portion 570, and the pair of wings 140 are arranged to sandwich the tongue portion 570. In the winged needle assembly set 1, the pair of wings 140 are raised upward with the vicinity of their bases sandwiched between the side edge 560b and the tongue portion 570.

[0113] As described above, the first cylindrical portion 510 has an upper opening 560, which is an opening for allowing the pair of wings 140 to extend outside the case 150, and a tongue portion 570, which extends from a tip edge portion 560a, which is the edge of the upper opening 560, toward the base end and presses against the cylindrical portion 150 of the winged needle assembly 101. The first cylindrical portion 510 also has grooves 580 formed between a side edge portion 560b of the upper opening 560 and the tongue portion 570, through which the pair of wings 140 are respectively inserted. The tongue portion 570 is formed, for example, with a length sufficient to cover the cylindrical portion 150. A longer tongue portion 570 makes it easier to prevent the case 500 from coming off, but if it is too long, problems such as the tip of the needle 110 coming into contact with the tongue portion 570 and being damaged when the winged needle assembly 101 is removed from the case 500 may occur. In order to prevent the upper opening 560 from bending, the edges of the upper opening 560 may be thickened, and walls may be formed along the vertical direction at the tip edge 560a and the side edge 560b.

[0114] Figure 18 is a diagram showing the state of a puncture operation using the winged needle assembly 101. As shown in Figure 18, when inserting the needle 110 into a patient's blood vessel, the pair of wings 140 are bent upward and held in an overlapping state. That is, the pair of wings 140 are bent upward and held so as to sandwich the tubular portion 150. With the winged needle assembly set 1 having the above-described configuration, the pair of wings 140 extend out of the case 500 in an upright state facing upward, allowing medical personnel to grasp the wings 140 stably and quickly. In other words, the case 500 realizes a state in which the wings 140 are upright and facing in the same direction.

[0115] Furthermore, in case 500, first cylindrical portion 510 that raises wings 140 and second cylindrical portion 520 that houses needle 110 are integrated, so that the pair of wings 140 can be stably gripped and then second cylindrical portion 520 can be pulled toward the tip to remove case 500. In particular, since case 500 covers almost the entire winged needle assembly 101 except for wings 140, there is nothing to grip other than wings 140, and this procedure can be carried out more reliably.

[0116] Furthermore, in the winged needle assembly set 1, the pair of wings 140 stand up facing upward, and the pair of flexible pieces 360 are covered by the case 500, so the wings 140 are grasped in a manner that makes it difficult for the flexible pieces 360 to be pressed accidentally. When grasping the wings 140 by bending them, the wings 140 or fingers may come into contact with the flexible pieces 360, accidentally pressing the flexible pieces 360 and causing the puncture prevention mechanism to malfunction, but such malfunctions are effectively prevented in the case of the winged needle assembly set 1. Furthermore, the case 500 prevents the flexible pieces 360 from being pressed during transport and storage as well.

[0117] Second Embodiment A winged needle assembly set 2 of the second embodiment will be described in detail with reference to Figures 19 and 20. Figure 19 is a perspective view of the winged needle assembly set 2, and Figure 20 is a cross-sectional view of the winged needle assembly set 2. In the following, the same or similar components as those in the first embodiment will be denoted by the same reference numerals, and duplicate explanations will be omitted.

[0118] As shown in FIGS. 19 and 20 , the winged needle assembly set 2 includes a case 600 as a packaging material for covering the winged needle assembly 101. The case 600 includes a case main body 610 that houses the winged needle assembly 101, and a pair of first holding parts 650 that are erected on a bottom 620 of the case main body 610 and abut against the pair of wings 140 to cause the pair of wings 140 to stand facing the same direction, while also sandwiching the winged needle assembly 101. The case 600 may also be provided with a pair of second holding parts 660 that sandwich the base end of the housing 300. The second holding parts 660 are erected on the bottom 620 of the case main body 610, similar to the first holding parts 650. In this embodiment, a cap 670 (described later) is used as a cap for housing the needle 110, and therefore the case 600 does not have a configuration such as the tongue part 570 described above.

[0119] The case body 610 has a container shape with an open top, and houses the entire winged needle assembly 101. The case body 610 has a bottom 620 that is generally rectangular in plan view, side parts 630 that stand on the peripheral edges of the bottom 620, and flange parts 640 that protrude outward from the upper ends of the side parts 630 in parallel with the bottom 620. The bottom 620 is formed flat except for the part where the holding part is formed, and is formed in a size that allows the winged needle assembly 101 to be placed thereon.

[0120] The side portion 630 is formed in a rectangular cylindrical shape and surrounds the winged needle assembly 101 on all four sides. The side portion 630 is formed at a height such that the pair of upstanding wings 140 do not protrude from the opening of the case body 610. In other words, the bottom portion 620 and the side portion 630 form a space separated from the surroundings that can accommodate the entire winged needle assembly 101. For example, a sheet that seals the opening of the case body 610 may be attached to the flange portion 640, thereby sealing the internal space of the case 600 that accommodates the winged needle assembly 101.

[0121] The pair of first holding portions 650 are disposed facing each other at the center of the bottom portion 620, separated by a distance sufficient to sandwich the housing 300 of the winged needle assembly 101. The pair of first holding portions 650 are walls erected on the bottom portion 620, and include wall portions 650a that sandwich the portion of the housing 300 to which the wing portions 140 are attached from the left and right when the wing portions 140 are bent at their bases and erected, and wall portion 650b that extends from wall portion 650a toward the second holding portion 660 and covers the flexible piece 360. The pair of wall portions 650a are formed parallel to each other, while the pair of wall portions 650b have shapes that bulge outward from each other. Note that although the side portions 630 and the first holding portions 650 are formed spaced apart, they may be formed as a single wall so that the side portions 630 function as the first holding portions 650. In this case, the case can be made more compact.

[0122] The wall portion 650a abuts against the surfaces of the pair of standing wings 140 facing outward in the left-right direction. In other words, the wall portion 650a supports the pair of standing wings 140 from the outside, maintaining the standing state of the wings 140. The distance between the pair of wall portions 650a is set to, for example, be equal to or slightly larger than the sum of the outer diameter of the tube portion 150 and the thickness of the base portions of the pair of wings 140. The pair of wall portions 650b are formed with a gap between them that ensures a gap between them that prevents the flexible piece 360 ​​from contacting them, while also allowing the portion of the housing 300 on which the flexible piece 360 ​​is formed to be inserted. The wall portion 650b is curved to fit along the flexible piece 360.

[0123] The pair of first holding portions 650 are formed at a height that exceeds the upper surface of the winged needle assembly 101. On the other hand, the first holding portions 650 are preferably formed at a height that does not exceed the longitudinal center of the wing portions 140 in an upright state, so as to make it easier to grip the wing portions 140. In this embodiment, the pair of wall portions 650a, the pair of wall portions 650b, and the second holding portion 660 are all formed at the same height, but the heights of the walls may be different from each other. The pair of second holding portions 660 are arranged opposite each other with a gap that allows the base end portion of the housing 300 to be inserted so as to press two corners of the base end portion of the housing 300. In the case 600, the winged needle assembly 101 is stably held by the two holding portions.

[0124] In this embodiment, a cap 670 that houses the needle 110 is attached to the tip of the housing 300. The cap 670 is configured as a separate member from the case 600, and is removed after the winged needle assembly 101 is removed from the case 600 by grasping the wing portion 140. Note that while the winged needle assembly 101 is housed in the case 600, the tip of the cap 670 and the side portion 630 of the case body 610 are close to each other, so the cap 670 cannot be removed.

[0125] According to the winged needle assembly set 2 having the above-described configuration, the pair of wings 140 are in an upwardly extending state, similar to the winged needle assembly set 1, so that the wings 140 can be grasped stably and quickly during a puncture operation. Furthermore, since the cap 670 cannot be removed while the winged needle assembly 101 is housed in the case 600, the operation of removing the cap 670 with the pair of wings 140 stably grasped can be more reliably performed. In addition, since the pair of flexible pieces 360 are covered by the first holding part 650, the wings 140 are grasped in a state in which the flexible pieces 360 are less likely to be pressed accidentally, and malfunction of the puncture prevention mechanism during a puncture operation is effectively suppressed.

[0126] The above-described embodiments may be modified as appropriate without impairing the objectives of the present invention. For example, while the packaging material in the above-described embodiments covers most of the winged needle assembly 101, the packaging material may be attached only to the base portions of the wings 140. Furthermore, the retaining portion that keeps the wings standing upright may extend from the sides rather than from the bottom. Furthermore, a clip-like member may be provided separately from the packaging material to clamp the base portions of the pair of wings 140 from the left and right, thereby keeping the wings standing upright. In this case, too, it is preferable that the wings are standing upright when contained in the packaging material. The winged needle assembly according to the present invention may also include a removable retaining portion that keeps the pair of wings standing upright in the same direction. The retaining portion is removed after the wings are gripped during the puncture operation or after the puncture operation is performed.

[0127] Furthermore, the winged needle assembly to which the present invention is applied is not limited to winged needle assembly 101. The winged needle assembly may, for example, have an operating part extending from the vicinity of the wing part toward the base end, or may have a housing in which the operating part and the locked part are provided on the top surface rather than on the left and right surfaces, as shown in JP 20112000599 A.

[0128] The housing of the winged needle assembly may have an operating portion, as shown in International Publication No. 2017 / 033449 (FIG. 12), in which a locking portion is locked at a first position of the needle hub where the needle protrudes from the nozzle, and which disengages the locking portion when pressed. That is, the operating portion also functions as a locked portion. In this case, it is preferable that the packaging material covers the operating portion of the housing, as in the above-described embodiment. The housing may have a locked portion, with which the locking portion is locked at a first position of the needle hub, as shown in JP-A-2007-521080 (FIG. 14), but may not have an operating portion. In this case, it is preferable that the packaging material covers the locked portion of the housing.

[0129] Furthermore, the winged needle assembly to which the present invention is applied may not have a spring-type puncture prevention mechanism. For example, as disclosed in Japanese Patent Application Laid-Open Publication No. 2020-62507, the winged needle assembly may have a non-spring-type puncture prevention mechanism in which the needle tip is housed within the housing by pinching a stopper provided on the needle hub and sliding the needle hub toward the base end. The winged needle assembly may not have a puncture prevention mechanism and the needle may not move. The present invention can also be applied to indwelling needles in which the needle extends in the same direction as the upright wings, such as double-needle types consisting of an inner needle and an outer needle, or L-shaped needles.

[0130] A winged needle assembly according to one aspect of the present invention may be a winged needle assembly 10X shown in FIG. 21. Similar to the winged needle assembly described above, the winged needle assembly 10X includes a needle 11X, a needle hub 20X to which the proximal end of the needle 11X is fixed, a cylindrical housing 30X into which the needle hub 20X is inserted, and a pair of wings 14X. A locking portion 23X is formed in the needle hub 20X, and a first opening 34X is formed in the housing 30X to which the locking portion 23X is locked at a first position of the needle hub 20X. The housing 30X also includes a flexible piece 36X as an operating part for pressing the locking portion 23X. The flexible piece 36X is disposed opposite the locking portion 23X and presses the locking portion 36X from the outside of the housing 30X, thereby moving the locking portion 36X into the cylindrical housing 30X.

[0131] The flexible piece 36X is similar to the flexible piece of the winged needle assembly described above in that it is formed in an arm shape extending from the outer circumferential surface of the housing 30X, with one provided on each side of the housing 30X. However, the flexible piece 36X differs from the flexible piece of the winged needle assembly described above in that it extends from the wing portion 14X (the wing) side of the housing 30X toward the proximal end, and is formed so that the distance from the outer circumferential surface of the housing 30X gradually increases toward the proximal end. The free end (tip) of the flexible piece 36X is located away from the wing and the locking portion 36X toward the proximal end of the assembly. The base portion of the flexible piece 36X is preferably located adjacent to the wing portion 14X on the outer circumferential surface of the housing 30X. The base portions of the pair of flexible pieces 36X are connected to each other by a wall portion 40X extending in the left-right direction. The pressing protrusions 37X that press the locking portions 23X inward are formed in positions facing the locking portions 23X near the bases of the flexible pieces 36X.

[0132] In the winged needle assembly 10X, the free end (tip) of the flexible piece 36X is also pressed when the needle 11X is housed in the housing 30X. However, in the winged needle assembly 10X, the free end of the flexible piece 36X is separated from the wing portion 14, making it less likely that the flexible piece 36X will be unintentionally pressed during the puncture operation. Furthermore, the wall portion 40X functions as a malfunction prevention portion that prevents malfunction of the puncture prevention mechanism due to incorrect operation of the flexible piece 36X. The wall portion 40X is a wall located between the wing portion 14X and the first opening 34X, and protrudes in the left-right direction intersecting the axial direction of the housing 30. It is preferable that the wall portion 40X protrudes left and right beyond the tip of the locking portion 23X that fits into the first opening 34X. [Explanation of symbols]

[0133] 10, 50, 55, 60, 65 Winged needle assembly, 11 needle, 11a needle tip, 12 spring, 13 wing, 14 wing portion, 15 cylindrical portion, 16, 69 recess, 20 needle hub, 21, 31 large diameter portion, 22, 32 small diameter portion, 23 locking portion, 24 flange portion, 25, 39 convex portion, 26 step, 30 housing, 33a, 33b opening, 34 first opening, 35 second opening, 36 flexible piece, 37 pressing protrusion, 38 inclined wall portion, 40 protruding wall, 41 annular portion, 51 malfunction prevention member, 56 malfunction prevention cylindrical portion, 61, 66 stopper, 62, 67 base portion, 63 protrusion, 64, 68 grip portion, 100 tube

[0134] 1, 2 Winged needle assembly set, 101 Winged needle assembly, 110 Needle, 110a Needle tip, 120 Spring, 140 Wing portion, 150 Cylinder portion, 160, 540a Recess, 200 Needle hub, 210, 310 Large diameter portion, 220, 320 Small diameter portion, 230 Locking portion, 240 Flange portion, 300 Housing, 340 First opening, 350 Second opening, 360 Flexible piece, 370 Pressing projection, 380 Convex portion, 390 Annular portion, 500, 600 Case, 510 First cylinder portion, 510a Narrowed portion, 510b Wide portion, 520 Second cylinder portion, 530 Side wall portion, 540 Lower cover portion, 550 Upper cover portion, 560 Upper opening, 560a Leading edge portion, 560b side edge portion, 570 tongue portion, 580 groove, 610 case body, 620 bottom portion, 630 side portion, 640 flange portion, 650 first holding portion, 650a, 650b wall portion, 660 second holding portion, 670 cap

Claims

1. A winged needle assembly equipped with a needle puncture prevention mechanism, a needle hub to which the base end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing that supports the needle hub at a first position where the needle protrudes from a nozzle; a spring that biases the needle hub toward the proximal end of the housing; a wing provided on the housing; a malfunction prevention unit that prevents malfunction of the mis-puncture prevention mechanism; Equipped with The housing includes: a locked portion to which the locking portion is locked at the first position of the needle hub; an operating portion that presses the locking portion; and a winged needle assembly, wherein the malfunction prevention portion is a wall portion located between the wing and the operating portion or between the wing and the engaging portion and extending in a direction intersecting the axial direction of the housing, an inhibiting portion provided on the wing and inhibiting the wing from bending inside the engaging portion, or an inhibiting portion removably or slidably attached to the outer peripheral surface of the housing and interposed between the outer peripheral surface and the operating portion to inhibit the pressing operation of the operating portion.

2. A winged needle assembly equipped with a needle puncture prevention mechanism, a needle hub to which the base end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing supporting the needle hub, the housing having an operating part that engages the locking part when the needle hub is at a first position where the needle protrudes from the cylindrical tip and disengages the locking part when pressed; a spring that biases the needle hub toward the proximal end of the housing; a wing provided on the housing; a malfunction prevention unit that prevents malfunction of the mis-puncture prevention mechanism; Equipped with a winged needle assembly, wherein the malfunction prevention portion is a wall portion located between the wing and the operating portion and extending in a direction intersecting the axial direction of the housing, an inhibiting portion provided on the wing and inhibiting the wing from bending inside the locking portion, or an inhibiting portion removably or slidably attached to the outer peripheral surface of the housing and interposed between the outer peripheral surface and the operating portion to inhibit the pressing operation of the operating portion.

3. A winged needle assembly equipped with a needle puncture prevention mechanism, a needle hub to which the base end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing supporting the needle hub, the housing having a locking portion to which the locking portion is locked when the needle hub is at a first position where the needle protrudes from the cylindrical tip; a spring that biases the needle hub toward the proximal end of the housing; a wing provided on the housing; a malfunction prevention unit that prevents malfunction of the mis-puncture prevention mechanism; Equipped with a winged needle assembly, wherein the malfunction prevention portion is a wall portion located between the wing and the engaging portion and extending in a direction intersecting the axial direction of the housing, or an inhibiting portion provided on the wing that inhibits the wing from bending inside the engaging portion.

4. an operating portion that presses the locking portion or that releases the locking portion when pressed; The winged needle assembly according to any one of claims 1 to 3, wherein the malfunction suppression portion is a protruding wall formed on the outer peripheral surface of the housing between the locked portion or the operating portion and the wing, and extending beyond the tip of the locking portion.

5. The wing includes a pair of wing bodies extending in a direction perpendicular to the axial direction of the housing, and a cylindrical portion to which the pair of wing bodies are connected and which is fitted onto the housing, The winged needle assembly according to any one of claims 1 to 3, wherein the malfunction suppression portion is provided on the cylindrical portion of the wing and extends to a position that overlaps at least with the tip of the locking portion in the axial direction of the housing.

6. A winged needle assembly equipped with a needle puncture prevention mechanism, a needle hub to which the base end of the needle is fixed and which has a locking portion formed thereon; a cylindrical housing that supports the needle hub at a first position where the needle protrudes from a nozzle; a spring that biases the needle hub toward the proximal end of the housing; a wing provided on the housing; Equipped with The housing includes: a locked portion to which the locking portion is locked at the first position of the needle hub; an operating portion that presses the locking portion from outside the housing; and The operating part is a flexible piece extending from the wing side of the housing toward the base end, and a pressing protrusion that presses the locking part is formed on the fixed end side of the operating part relative to the housing, and the pressing protrusion and a free end that is pressed by the operating part are arranged in this order from the fixed end toward the base end, making it a winged needle assembly.

7. A packaging material for use with a winged needle assembly having a needle, a cylindrical body to which the needle is fixed, a spring that generates a biasing force to move the needle toward the base end of the winged needle assembly when compressed, an operating part that releases the compression of the spring, a housing that accommodates the needle after the compression of the spring is released, and a pair of wings provided on the body, A packaging material for a winged needle assembly, which is configured to abut against the pair of wing portions and cause the pair of wing portions to stand up facing the same direction, and which has a wall portion that covers the operating portion.

8. The packaging material is a case body that houses the winged needle assembly; The wall portion; and 8. A packaging material for a winged needle assembly according to claim 7, wherein the wall portion is erected on the bottom of the case body, abuts against the pair of wing portions to make the pair of wing portions stand in the same direction, covers the operating portion of the winged needle assembly, and is a pair of holding portions that sandwich the housing.

9. A cap body for use with a winged needle assembly, the cap body having a needle, a cylindrical body to which the needle is fixed, a spring that generates a biasing force to move the needle toward the base end of the winged needle assembly when compressed, an operating part that releases the compression of the spring, a housing that accommodates the needle after the compression of the spring is released, and a pair of wings provided on the body, a base portion that abuts against the pair of wing portions to make the pair of wing portions stand in the same direction and that covers the operation portion; a cap portion extending from the tip of the base portion and housing the needle; A cap body for a winged needle assembly, comprising:

10. The base portion is an opening for allowing the pair of wing portions to extend outward from the cap body; a tongue portion extending from the edge of the opening and holding the winged needle assembly; 10. The cap body for a winged needle assembly according to claim 9, comprising:

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