JP7570933B2 - Spike adapter and connection structure - Google Patents

Description

The present invention relates to a spike adapter that is connected to an infusion bag and a connector, and to a connection structure between the spike adapter and the connector.

Conventionally, in order to fluidly connect an infusion container such as an infusion bag to a device such as a syringe, a spike adapter is used to connect to the infusion container, and a connector is used to connect to the device, and the spike adapter and connector are used to connect the infusion container and the device to the fluid.

The spike adapter has a spike portion that is inserted into the stopper of the infusion container, and a connection portion that is connected to the connector. The user holds the spike adapter, for example, by pinching it with their fingers, and presses the spike adapter toward the infusion container while pressing the tip of the spike adapter against the stopper of the infusion container, thereby inserting the spike portion into the stopper. The user also holds the spike adapter by pinching it with multiple fingers, and presses the spike adapter toward the connector while the connection portion is in contact with the connected portion of the connector, thereby connecting the connection portion to the connected portion (see, for example, Patent Document 1).

International Publication No. 2018/186361

However, the above-mentioned spike adapter has the following problem. That is, when, for example, an infusion container and a syringe are connected using the spike adapter and a connector to supply medicinal liquid from the syringe to the infusion container, and then the medicinal liquid in the infusion container is to be supplied from the infusion container to a patient, it is necessary to connect the spike adapter to another connector to which, for example, an infusion set is connected. In this way, there is a problem in that repeated work of connecting the spike adapter to a connector in order to replace the spike adapter with a different connector places a heavy burden on the fingers.

The present invention aims to provide a spike adapter and connection structure that allows easy connection to the other end.

The spike adapter of the present invention is a spike adapter that fluidly connects an infusion container and a device together with a connector that is connected to the device, and is provided with a gripping portion that is formed long in one direction, has a straight portion formed toward the center in the longitudinal direction of the circumferential surface, and is parallel to the longitudinal direction, and has curved arch portions formed on both ends of the straight portion in the longitudinal direction and increasing in height from the straight portion as it moves away from the straight portion, a spike portion provided at one end of the gripping portion and inserted into the infusion container, a connection portion provided at the other end of the gripping portion and inserted into the connector, and a flow path formed in the spike portion, the gripping portion, and the connection portion that connects the infusion container and the connector.

The present invention provides a spike adapter and connection structure that allows easy connection to a connecting partner.

1 is a perspective view showing an infusion bag and a syringe fluidly connected by a spike adapter and an infusion connector according to one embodiment of the present invention; FIG. FIG. 4 is a side view showing the configuration of the spike adapter. FIG. 4 is a cross-sectional view showing the configuration of the spike adapter. FIG. 4 is a cross-sectional view showing the configuration of the spike adapter. FIG. 4 is a cross-sectional view showing the configuration of the spike adapter. FIG. 4 is a cross-sectional view showing the configuration of the spike adapter. FIG. 2 is a perspective view showing the configuration of the infusion connector. FIG. 4 is a cross-sectional view showing the configuration of the infusion connector. FIG. 4 is a cross-sectional view showing the configuration of the infusion connector. FIG. 4 is a perspective view showing the configuration of a connecting member of the infusion connector. FIG. 2 is an explanatory diagram showing the spike adapter connected to the infusion bag. FIG. 4 is an explanatory diagram showing the state in which the syringe is connected to the infusion connector. FIG. 4 is a cross-sectional view showing the main parts of the infusion connector and the syringe. FIG. 13 is an explanatory diagram showing an example of connecting an infusion container to which a syringe is connected to a spike adapter connected to the infusion bag. 13 is a cross-sectional view showing the configuration of a modified ratchet used in the infusion connector. FIG. FIG. 13 is a perspective view showing a configuration of a modified example of the spike adapter. FIG. 13 is a front view showing the configuration of a syringe adapter which is a modified example of a connector to which the spike adapter is connected. FIG. 2 is a side view showing the configuration of the syringe adapter. FIG. 13 is a cross-sectional view showing a state in which a modified example of the spike adapter is connected to the syringe adapter. FIG. 4 is a cross-sectional view showing a main part of the syringe adapter when the spike adapter is connected to the syringe adapter. 13 is a perspective view showing the configuration in which an infusion set is connected to the infusion connector. FIG. 3 is a cross-sectional view showing the main parts of the infusion connector and the infusion set. FIG. FIG. 4 is a cross-sectional view showing the configuration of a modified example of the infusion set. FIG. 13 is a perspective view showing the configuration of a modified example of the infusion set. FIG. 13 is a perspective view showing the configuration of a modified example of the infusion set. 3 is a cross-sectional view showing the main parts of the infusion connector and the infusion set. FIG. 13 is a perspective view showing the configuration of a modified example of the infusion connector and a modified example of the infusion set. FIG. 13 is a perspective view showing the configuration of a modified example of the infusion connector and a modified example of the infusion set. FIG.

The spike adapter 10 according to one embodiment of the present invention will be described with reference to Figures 1 to 14.

Figure 1 is a perspective view showing an infusion bag 1 and a syringe 5 fluidly connected by a spike adapter 10 and an infusion connector 100. Figure 2 is a perspective view showing the configuration of the spike adapter 10. Figure 3 is a side view showing the configuration of the spike adapter 10. Figure 4 is a cross-sectional view showing the configuration of the spike adapter 10, specifically, a cross-sectional view taken along a cross section perpendicular to the longitudinal direction at the center of the longitudinal direction of the gripping portion 20, looking from the second flange 22 side to the first flange 21 side.

Figure 5 is a cross-sectional view showing the configuration of the spike adapter 10, specifically a cross-sectional view taken along a cross section perpendicular to the longitudinal direction at the center of the longitudinal direction of the gripping portion 20, looking from the first flange 21 side to the second flange 22 side. Figure 6 is a cross-sectional view showing the configuration of the spike adapter 10, specifically a cross-sectional view showing the state cut along the flow path 50. Figure 7 is a cross-sectional view showing the configuration of the spike adapter 10, specifically a cross-sectional view showing the state rotated 90 degrees from the cross-sectional view shown in Figure 5.

Figure 8 is a perspective view showing the configuration of the infusion connector 100. Figure 9 is a cross-sectional view showing the configuration of the infusion connector 100. Figure 10 is a cross-sectional view showing the configuration of the infusion connector 100. Figure 11 is a perspective view showing the configuration of the connection member 120 of the infusion connector 100. Figure 12 is an explanatory diagram showing the state in which the spike adapter 10 is connected to the infusion bag 1. Figure 13 is an explanatory diagram showing the state in which the syringe 5 is connected to the infusion connector 100. Figure 14 is a cross-sectional view showing the main parts of the infusion connector 100 and the syringe 5.

The spike adapter 10 fluidly connects the infusion container and the device together with a connector that is connected to the device. When the spike adapter 10 is connected to the connector, it forms a flow path that communicates between the infusion container and the device.

In this embodiment, the spike adapter 10 fluidly connects an infusion bag 1, which is an example of an infusion container, to a syringe 5, which is an example of a device, together with an infusion connector 100, which is an example of a connector connected to the syringe 5.

As shown in FIG. 1 , the infusion bag 1 includes a bag body 2 and a stopper 3 .
As shown in Figures 1, 13 and 14, the syringe 5 includes an outer cylinder 6 and a plunger 7. A tip 8 and a male luer 8b are provided at the tip of the outer cylinder 6. A threaded portion 8a is formed on the inner surface of the tip 8, into which the infusion connector 100 is screwed. The threaded portion 8a is, for example, a female thread formed on the inner surface of the tip 8. The male luer 8b is formed in the tip 8. The male luer 8b is formed in a cylindrical shape that communicates with the inside of the outer cylinder 6.

As shown in Figs. 2 to 7, the spike adapter 10 includes a gripping portion 20, a spike portion 30, a connecting portion 40, and a flow path 50. The gripping portion 20 of the spike adapter 10 is gripped by the user when the user connects the spike adapter 10 to the infusion bag 1 and connects the spike adapter 10 to the infusion connector 100. The spike adapter 10 communicates with the infusion bag 1 when the spike portion 30 is inserted into the stopper 3 of the infusion bag 1, and is connected to the infusion connector 100 when the connecting portion 40 is inserted into the infusion connector 100.

The gripping portion 20 is formed in a shape that is long in one direction. A first flange 21 is formed at one end of the gripping portion 20. The dimension of the first flange 21 in a direction perpendicular to the longitudinal direction of the gripping portion 20 is formed in a shape that is larger than the spike portion 30. In other words, the first flange 21 has a size that allows it to hide the spike portion 30 when the first flange 21 is viewed from the second flange 22 side along the longitudinal direction of the gripping portion 20.

A second flange 22 is formed at the other end of the gripping portion 20. The dimension of the second flange 22 in a direction perpendicular to the longitudinal direction of the gripping portion 20 is formed to be larger than the connection portion 40. In other words, the second flange 22 has a size that can hide the connection portion 40 when viewed from the first flange 21 side along the longitudinal direction of the gripping portion 20. In addition, an engagement portion 23 that engages with the connection portion 40 is formed at the other end of the gripping portion 20, as shown in FIG. 6.

The center of the gripping portion 20 in the longitudinal direction is formed into a straight portion 24 that is parallel to the longitudinal direction of the gripping portion 20, as shown in Figures 2 to 6.

In addition, both ends of the straight portion 24 in the longitudinal direction of the gripping portion 20 are formed into arch portions 27. The arch portions 27 are formed in a curved shape that increases in height from the straight portion 24 as it moves away from the straight portion 24 along the longitudinal direction of the gripping portion 20. In this embodiment, the arch portions 27 are ribs. In addition, the arch portions 27 are, for example, a pair of ribs formed at symmetrical positions in the circumferential direction of the peripheral surface of the gripping portion 20.

The curved outer surface of the arch portion 27, in other words the end surface 27a protruding from the straight portion 24 in a direction perpendicular to the longitudinal direction of the grip portion 20, is curved.

As shown in FIG. 3, the length L1 of the straight portion 24 along the longitudinal direction of the grip portion 20 is, for example, smaller than the length L2 of the arch portion 27 along the longitudinal direction of the grip portion 20. Also, the height H of the arch portion 27 is smaller than the length L1. In the example of this embodiment, if the longitudinal dimension L3 of the grip portion 20 is 29 mm, the length L1 of the straight portion 24 along the longitudinal direction of the grip portion 20 is 7 mm, the length L2 of the arch portion 27 along the longitudinal direction of the grip portion 20 is 11 mm, and the height H of the arch portion 27 from the straight portion 24 is 3.5 mm.

As shown in Figs. 2, 4, 5, and 7, grooves 25 are formed at symmetrical positions in the circumferential direction of the peripheral surface of the gripping portion 20. The grooves 25 extend from one end to the other end in the longitudinal direction of the gripping portion 20. In this embodiment, the grooves 25 extend from the first flange 21 to the second flange 22. In this embodiment, the grooves 25 are disposed between a pair of ribs constituting the arch portion 27, for example, in the center in the circumferential direction between the pair of ribs. In other words, the pair of ribs constituting the arch portion 27 are formed integrally with the area of the peripheral surface of the gripping portion 20 surrounding the grooves 25.

As shown in Figures 4 and 7, in the straight portion 24, the width of the groove 25 is longer than the depth of the groove 25. In this embodiment, in the straight portion 24, the width of the bottom surface 25a of the groove 25 is greater than the depth of the groove 25. Here, the width is a direction perpendicular to both the longitudinal direction of the gripping portion 20 and the depth direction of the groove 25. If the width of the groove 25 is W and the depth of the groove 25 is D, then in the straight portion 24, for example, the dimension W is 1.5 mm and the dimension D is 0.91 mm.

In this embodiment, the pair of ribs of the arch portion 27 are integrally formed with the surrounding area of the groove 25, so that a groove is formed by the pair of ribs of the arch portion 27 and the groove 25 on both ends of the straight portion 24 in the longitudinal direction of the grip portion 20. The depth of the groove formed by the pair of ribs of the arch portion 27 and the groove 25 becomes deeper toward both ends of the grip portion 20, and in this embodiment, toward the flanges 21, 22.

The bottom surface 25a of the groove 25 is formed, for example, as a curved surface that protrudes outward. Here, the curved surface that protrudes outward is a curved surface that is convex in the direction from the groove 25. The ridge portion 25c between the inner side surface 25b and the bottom surface 25a of the groove 25 is formed as a curved surface. The ridge portion 25c is formed as a curved surface that is convex on the side opposite the bottom surface 25a. The radius of curvature of the bottom surface 25a is, for example, larger than the radius of curvature of the ridge portion 25c. In the example of this embodiment, if the radius of curvature of the bottom surface 25a is R1 and the radius of curvature of the ridge portion 25c is R2, R1 is 3 mm and R2 is 1 mm.

In another example, the bottom surface 25a may be formed as an arc having the same center of curvature as the ridge portion 25c and the same radius of curvature as the ridge portion 25c. In this configuration, the one ridge portion 25c, the bottom surface 25a, and the other ridge portion 25c are formed as curved surfaces having the same center of curvature and the same radius of curvature. In another example, the bottom surface 25a may be formed as a flat surface, for example.

In this embodiment, the ridge 25c is curved to facilitate injection molding, for example, when the spike adapter 10 is molded by injection molding.

The periphery 20a of the groove 25 on the peripheral surface of the gripping portion 20 and the inner surface 25b of the groove 25 are formed into a continuous curved surface. For example, in the straight portion 24, the periphery 20a and the inner surface 25b are formed into a curved surface having a constant radius of curvature.

As shown in Figs. 3 and 4, the region 28 between the pair of grooves 25 on the circumferential surface of the straight portion 24 is formed into a curved surface that is convex outward. The radius of curvature of the region 28 is, for example, larger than the radius of curvature of the periphery 20a and the inner surface 25b. In this embodiment, if the radius of curvature of the region 28 is R3 and the radius of curvature of the periphery 20a and the inner surface 25b is R4, R3 is 5 mm and R4 is 1.25 mm. In another example, a rib may be formed in the region 28. The rib is formed, for example, in a shape that extends in the longitudinal direction of the gripping portion 20.

A curved arch portion 29 is formed on both ends of the region 28 between the grooves 25 on the circumferential surface of the grip portion 20 in the longitudinal direction of the grip portion 20, the height of which increases from the region 28 as it moves away from the region 28 in the longitudinal direction of the grip portion 20. The arch portion 29 is, for example, a rib. The arch portion 29 is formed, for example, in the center in the circumferential direction between one groove 25 and the other groove 25. The arch portion 29 is formed integrally with the first flange 21 or the second flange 22. The end face 29a of the arch portion 29 protruding from the region 28 in a direction perpendicular to the longitudinal direction of the grip portion 20 is formed into a curved surface.

For example, as described above, when a rib is formed in region 28 of straight portion 24, this rib and arch portion 29 may be formed continuously. In this configuration, arch portion 29 is formed in a curved shape such that the height from the rib formed in region 28 increases with increasing distance from region 28.

The spike portion 30 is formed at one end of the grip portion 20 as shown in FIG. 2. The spike portion 30 is formed in a shape that extends along the longitudinal direction of the grip portion 20. The spike portion 30 is formed, for example, integrally with the grip portion 20 as shown in FIG. 5 and FIG. 6.

The connection part 40 is provided at the other end of the grip part 20 as shown in Figures 2, 6 and 7. The connection part 40 is configured to be connectable to the infusion connector 100.

Specifically, as shown in FIG. 2, the connection part 40 includes a connection part body 41 having a portion of the flow path 50 therein, and a seal 42 that seals the flow path within the connection part body 41.

The connection part body 41 is formed, for example, separately from the grip part 20 and is fixed to the grip part 20. The connection part body 41 has an engaged part 43 that engages with the engaging part 23 of the grip part 20. The connection part body 41 is fixed to the grip part 20 by the engaging part 23 engaging with the engaged part 43. At the tip of the connection part body 41, an opening 44 is formed that communicates with the flow path, as shown in Figures 6 and 7.

As shown in FIG. 2, a first indicator (spike adapter indicator) 45 is formed on the outer surface of the connection body 41. The first indicator 45 is an indicator for aligning the position of the connection part 40 relative to the infusion connector 100 when connecting the connection part 40 to the infusion connector 100. Here, aligning the position of the connection part 40 relative to the infusion connector 100 means aligning the circumferential positions of the connection part 40 and the infusion connector 100.

The first indicator 45 is formed, for example, in a triangular shape by printing on the outer surface of the connection part main body 41. The first indicator 45 has a color different from the surroundings. One of the three vertices of the first indicator 45 is located closer to the tip side of the connection part 40 than the other two vertices. The tip side of the connection part 40 is the end side of the connection part 40 opposite the second flange 22 side.

The seal 42 is provided at the opening 44 of the connection part 40 as shown in Figs. 2, 6 and 7. The seal 42 seals the opening 44. The seal 42 is made of a resin such as rubber or elastomer, and is flexible. The seal 42 is also formed so that it can liquid-tightly and air-tightly close the hole formed by the insertion of the flow path member 150 (described later) of the infusion connector 100 after the flow path member 150 moves, using its restoring force.

The flow path 50 is formed in the spike adapter 10 and extends from one end to the other end of the spike adapter 10. Specifically, one end of the flow path 50 opens at the tip of the spike portion 30. The other end of the flow path 50 opens at the opening 44 of the connection portion main body 41.

As shown in Figures 1, 8 to 11, the infusion connector 100 includes, for example, a housing 110, a connection member 120 that is rotatably supported by the housing 110 and to which a syringe 5 is connected, and a ratchet 130 that restricts rotation of the connection member 120 in a first direction that is the same as the screwing direction of the syringe 5 and allows rotation in a second direction that is the same as the other direction.

In this embodiment, the syringe 5 being connected to the connecting member 120 means that the nozzle 8 is screwed into the connecting member 120 and the male lure 8b is fitted into the connecting member 120. When the male lure 8b is fitted into the connecting member 120, the outer surface of the male lure 8b comes into surface contact with the inner surface of the connecting member 120, and the space between the outer surface of the male lure 8b and the inner surface of the connecting member 120 is sealed.

The infusion connector 100 also includes an engagement member 140 that fixes and releases the connection part 40 of the housing 110 and the spike adapter 10, a flow path member 150 that is provided in the housing 110 and connected to the connection member 120, a cylindrical head sleeve 160 that is movably stored in the housing 110, a needle seal 180 that is fixed to the head sleeve 160, a stopper sleeve 170 that is configured to selectively fix the head sleeve 160 to the housing 110 and to selectively fix the head sleeve 160 to the spike adapter 10, and a biasing member 190 that biases the head sleeve 160 in a direction to move it out of the housing 110.

As shown in Figures 8 and 10, the housing 110 is formed by combining a first case 116 and a second case 117. The housing 110 is formed, for example, in a cylindrical shape with one end closed and the other end open. Specifically, the housing 110 includes an end wall portion 111, a body portion 112, a support wall portion 113, a second indicator 118, a third indicator 119a, and a fourth indicator 119b. The housing 110 is also integrally formed with a claw 132 of the ratchet 130, which will be described later. The connection portion 40 of the spike adapter 10 is inserted into the housing 110 from the opening 110a at the other end.

The end wall portion 111 is configured, for example, in the shape of a plate with a part of the edge formed in an arc shape and the other part formed in a rectangular shape. The end wall portion 111 is formed with a hole 111a. In the example of this embodiment, as shown in FIG. 8, the hole 111a is provided, for example, at a position offset from the center of the arc in the region where the edge is formed in an arc shape. Note that forming the hole 111a at a position offset from the center of the arc means that the center position of the hole 111a is offset from the center of the arc. In another example, the hole 111a may be formed at the center of the arc in the region where the edge of the end wall portion 111 is formed in an arc shape.

The body 112 is formed on the edge of the end wall 111. The body 112 is formed in a cylindrical shape that movably positions the connection part 40 of the spike adapter 10. Specifically, the body 112 includes a cylindrical part 114a that is continuous with the part of the outer periphery of the end wall 111 that is formed in an arc shape, and a rectangular part 114b that is continuous with the part of the outer periphery of the end wall 111 that is formed in a rectangular shape.

In addition, holes 115 are formed at the lower end of the cylindrical portion 114a. The holes 115 penetrate the body portion 112 in the radial direction. The holes 115 are formed in an elongated shape along the axis of the housing 110. Two holes 115 are formed.

The support wall portion 113 is formed on the inner surface of the body portion 112 as shown in Figures 9 and 10. The support wall portion 113 rotatably supports the connection member 120. The support wall portion 113 is, for example, a partition wall that divides the inside of the body portion 112 in the axial direction, and has a hole 113a in which the small diameter portion 120b (described later) of the connection member 120 is rotatably arranged.

8, the second indicator 118 is formed, for example, by printing on the opening 110a side of the outer surface of the cylindrical portion 114a of the body 112. The second indicator 118 has a color different from that of the housing 110. The second indicator 118 is used to align the connection portion 40 and the housing 110 when inserting the connection portion 40 of the spike adapter 10 into the housing 110. The second indicator 118 is disposed in a position aligned with the first indicator 45 in the insertion direction of the connection portion 40 into the opening 110a of the housing 110. The second indicator 118 has, for example, the same shape and color as the first indicator 45.

The second indicator 118 is formed, for example, in a portion that has commonality with the housing of a connector having the same function as the infusion connector 100, in other words, a portion that has a similar shape. For example, an example of the infusion connector 100 is the syringe adapter 200 described below. The housing 110A of the syringe adapter 200 has a cylindrical portion 114a, similar to the housing 110 of the infusion connector 100. Thus, in the relationship between the infusion connector 100 and the syringe adapter 200, the cylindrical portion 114a is an example of a portion that has commonality with a connector having the same function as the infusion connector 100. For this reason, in the example of this embodiment, the second indicator 118 is formed, for example, in the body portion 112.

In other words, when using the infusion connector 100 and the syringe adapter 200, the second indicator 118 is formed in a common portion of both the infusion connector 100 and the syringe adapter 200 that has a similar shape, so that the user can easily find the second indicator 118 when working with the infusion connector 100 and when working with the syringe adapter 200.

Specifically, the second indicator 118 is formed in a triangular shape. One vertex of the second indicator 118 is positioned closer to the opening 110a than the other two vertices.

The third indicator 119a is formed by printing and has a color different from the color of the housing 110. The third indicator 119a is formed, for example, in a circular shape. The third indicator 119a is an indicator that shows the position where the user places the thumb when inserting the connection part 40 of the spike adapter 10 into the opening 110a of the housing 110. The third indicator 119a is formed at a position on the housing 110 that avoids the engagement member 140. The third indicator 119a is also positioned in a position aligned with the second indicator 118 in the direction of insertion of the connection part 40 into the opening 110a of the housing 110.

The fourth indicator 119b is formed around the third indicator 119a. The fourth indicator 119b is formed in a protruding shape that surrounds the area where the thumb is placed when placed on the third indicator 119a. The fourth indicator 119b is formed integrally with the housing 110, for example.

The fourth indicator 119b is configured, for example, in a shape that opens on the side opposite the opening 110a, in other words, on the side of the end wall portion 111. The fourth indicator 119b is formed, for example, in a concave shape that surrounds a rectangular area in a plan view and opens on the side opposite the opening 110a.

The housing 110 thus configured is constructed by combining a first case 116 and a second case 117. As shown in Fig. 8 and Fig. 10, the cases 116 and 117 have a shape obtained by dividing the housing 110, for example, along a plane that passes through the axis of the housing 110 and is parallel to the direction in which the cylindrical portion 114a and the rectangular portion 114b of the body portion 112 are aligned. The cases 116 and 117 also have a convex portion and a concave portion that fit together when combined with each other.
Specifically, the first case 116 has a first end surface 116a. The first end surface 116a is formed, for example, as a flat surface. The first case 116 includes, for example, a plurality of protrusions 116b. The plurality of protrusions 116b are formed on the first end surface 116a. The plurality of protrusions 116b are formed, for example, on the central side of the first end surface 116a in the thickness direction of the wall thickness of the first case 116.

The second case 117 has a second end surface 117a. The second end surface 117a abuts, for example, the first end surface 116a. The second case 117 has a plurality of recesses 117b. The plurality of recesses 117b are formed so as to be able to fit into the plurality of protrusions 116b. The plurality of recesses 117b are formed in the second end surface 117a. The plurality of recesses 117b are formed on the center side of the second end surface 117a in the thickness direction of the second case 117.

In addition, one of the first case 116 and the second case 117, for example the first case 116, has a hole 116c formed in a part of the area facing the gear 131 of the ratchet 130 described later. The hole 116c extends, for example, from the end of the rectangular portion 114b of the first case 116 on the cylindrical portion 114a side in the circumferential direction centered on the axis of the cylindrical portion 114a to a position facing the central axis of the gear 131 of the ratchet 130 in the direction in which the protrusion 116b protrudes from the first end face 116a.

The hole 116c is configured in a shape that allows the first case 116 to be molded using a mold. The hole 116c is formed in a groove that does not undercut the pawl 132 of the ratchet 130. Specifically, the hole 116c is formed in a shape that is larger than the pawl 132 in the opposing direction of the first case 116 and the second case 117. Here, the hole 116c being larger than the pawl 132 in the opposing direction of the cases 116 and 117 means that the hole 116c has a size that allows the pawl 132 to be positioned in the opposing direction of the cases 116 and 117. In other words, the hole 116c is formed in a size that allows the pawl 132 to be positioned inside the hole 116c when viewed in the opposing direction of the cases 116 and 117.

As shown in Figures 9, 10, and 11, the connection member 120 is formed in a cylindrical shape, and a gear 131 of the ratchet 130, which will be described later, is formed integrally with the connection member 120. The connection member 120 is formed, for example, in a cylindrical shape having a large diameter portion 120a and a small diameter portion 120b. The inside of the connection member 120 forms a flow path L1. The axial middle portion of the large diameter portion 120a of the connection member 120 is placed in the hole 111a of the end wall portion 111 of the housing 110. The connection member 120 is arranged such that one end side of the large diameter portion 120a opposite the small diameter portion 120b is placed outside the housing 110. The other portion of the connection member 120, i.e., the small diameter portion 120b side of the large diameter portion 120a and the small diameter portion 120b, are placed inside the housing 110.

A stopper portion 120a1 is formed on the circumferential surface of the large diameter portion 120a, which is formed with a diameter larger than the diameter of the hole 111a. The stopper portion 120a1 abuts against the edge of the hole 111a, thereby preventing the connection member 120 from slipping out of the housing 110 through the hole 111a. A threaded portion 122 into which the nozzle 8 of the syringe 5 is screwed is formed on one end 121 of the large diameter portion 120a. The threaded portion 122 is, for example, a male screw that is screwed into the threaded portion 8a formed on the inner surface of the nozzle 8. The inner circumferential surface of the large diameter portion 120a is formed in a female lure shape that matches the male lure 8b of the syringe 5. Here, the female lure shape that matches the male lure 8b is a shape in which the outer circumferential surface of the male lure 8b comes into surface contact when the male lure 8b is inserted into the large diameter portion 120a, as shown in FIG. 14.

The small diameter portion 120b is disposed within the hole 113a of the support wall portion 113. By disposing the small diameter portion 120b within the hole 113a, the end face of the large diameter portion 120a acts as a stopper, preventing the connection member 120 from moving in a direction away from the end wall portion 111.

The ratchet 130 includes a gear 131 formed integrally with the connecting member 120 and a pawl 132 formed integrally with one of the first case 116 and the second case 117.

The gear 131 is integrally formed on the circumferential surface of the large diameter portion 120a of the connecting member 120 on the small diameter portion 120b side. The gear 131 has a plurality of teeth 131a in the circumferential direction of the large diameter portion 120a. The teeth 131a have a restriction surface 131b and a ride-on surface 131c.

The restricting surface 131b is formed, for example, on a plane that abuts the claw 132 and intersects with the direction in which the protrusion 116b protrudes from the first end surface 116a. In this embodiment, the intersecting direction is a direction perpendicular or substantially perpendicular.

The claw 132 is formed on the housing 110. The claw 132 extends toward the gear 131 in a direction perpendicular to the axial direction of the housing 110. The claw 132 restricts the rotation of the gear 131 in the first direction by engaging the regulating surface 131b of the gear 131 rotating in the first direction in a direction intersecting the protruding direction of the convex portion 116b relative to the first end face 116a of the first case 116. In the example of this embodiment, the regulating surface 131b of the claw 132 engages in a direction perpendicular or substantially perpendicular to the protruding direction of the convex portion 116b relative to the first end face 116a.

The claw 132 is disposed within the hole 116c. Specifically, the claw 132 includes a body 132a, an abutment portion 132b, and a rib 132c. When the force applied by the gear 131 biased in the first direction exceeds a predetermined value, the body 132a and the rib 132c elastically deform, causing the claw 132 to retreat from the gear 131, allowing the gear 131 to rotate in the first direction. Here, the predetermined value is a value smaller than the value at which the syringe 5 or the infusion connector 100 is damaged.

The main body 132a extends from one end 116c1 of the hole 116c on the rectangular portion 114b side along the outer periphery of the body 112, in a direction perpendicular to the axis of the housing 110, from the rectangular portion 114b toward the cylindrical portion 114a, toward the gear 131 side. The main body 132a extends from one end 116c1 of the hole 116c to near the other end. Here, one end of the claw 132 on the one end 116c1 side of the hole 116c is the base end 132e, and the other end is the tip. There is a gap between the main body 132a and the inner surface of the hole 116c. This gap is, for example, large enough that the main body 132a can move.

The outer surface 132a1 of the main body 132a is offset inward of the body 112 from the outer surface 112a of the torso 112. The outer surface 132a1 of the main body 132a is the surface exposed to the outside of the housing 110 through the hole 116c.

In this embodiment, for example, the offset amount of the outer surface 132a1 with respect to the outer surface 112a is an amount by which the outer surface 132a1 does not protrude outward from the outer surface 112a even if the claw 132 is elastically deformed as the riding surface 131c of the gear 131 rotating in the second direction rides up on the claw 132. In other words, the offset amount of the outer surface 132a1 with respect to the outer surface 112a is an amount by which the outer surface 132a1 is at the same position as the outer surface 112a, or the outer surface 132a1 is located on the inner side of the housing 110 than the outer surface 112a, even if the riding surface 131c of the gear 131 rotating in the second direction rides up on the claw 132, and the claw 132 is elastically deformed. Here, the outer surface 132a1 being at the same position as the outer surface 112a means that it is at the same position as the surface obtained by extending the outer surface 112a to the hole 116c.

Alternatively, the offset amount of outer surface 132a1 relative to outer surface 112a may be the amount by which outer surface 132a1 protrudes outward from outer surface 112a when claw 132 is elastically deformed as a result of the riding surface 131c of gear 131 rotating in the second direction riding over claw 132.

Furthermore, the offset amount of outer surface 132a1 toward the inside of housing 110 relative to outer surface 112a is the amount by which, when a user presses hole 116c of body 112 and the surrounding area with a finger, the finger can press main body 132a toward the inside of body 112, causing abutment portion 132b to abut against gear 131.

The abutment portion 132b protrudes from the tip of the main body 132a toward the inside of the trunk 112 and abuts against the gear 131. The abutment portion 132b is located closer to the gear 131 than the base end 132e of the main body 132a in the direction in which the abutment portion 132b protrudes from the main body 132a. The abutment portion 132b has a rigidity that does not deform even when the gear 131 rotating in the first and second directions abuts against it. The claw 132 has an abutment surface 132d against which the regulating surface 131b abuts. The abutment surface 132d is formed, for example, as a flat surface with which the regulating surface 131b makes surface contact, or a flat surface with which the regulating surface 131b makes approximate surface contact.

The rib 132c is formed along the main body 132a. The rib 132c is formed on the inner surface of the main body 132a. The inner surface of the main body 132a is the surface on the axial side of the housing 110. The rib 132c extends from the base end 132e of the main body 132a to the abutment portion 132b. The thickness of the rib 132c is thinner than the thickness of the main body 132a. Here, the thickness of the rib 132c refers to the thickness in a direction perpendicular to both the direction from the base end 132e of the main body 132a to the tip, and the direction in which the rib 132c protrudes from the main body 132a.

The thickness of the rib 132c and the height of the rib 132c protruding from the main body 132a are set to a thickness and a protruding height that allow the main body 132a and the rib 132c to elastically deform and retreat to a position where the gear 131 can rotate in the first direction when the pressing force applied by the gear 131 biased in the first direction exceeds a predetermined value. Here, the predetermined value is a value smaller than the value at which the syringe 5 and the infusion connector 100 are damaged, and is a value larger than the pressing force applied by the gear 131 that occurs when the syringe 5 is screwed into the connecting member 120 during normal use.

The tip surface 132c1 of the rib 132c in the protruding direction is flat on the contact portion 132b side and curved on the base end 132e side. One end of the rib 132c on the contact portion 132b side is connected to the middle of the contact portion 132b in the protruding direction.

In other words, in this embodiment, when the pressing force from the gear 131 biased in the first direction exceeds a predetermined value, the claw 132 is formed such that the body 132a and the rib 132c are elastically deformed to allow the gear 131 to retreat to a position where it can rotate in the first direction, and the tip surface 132c1 is formed flat with the contact portion 132b side lowered, and the base end 132e side of the tip surface 132c1 is formed into a gently continuing curved surface.

A plurality of engagement members 140 are provided, and engage with the connection portion 40 of the spike adapter 10 inserted into the housing 110. When the engagement members 140 engage with the connection portion 40, the connection portion 40 is fixed to the housing 110 via the engagement members 140. The engagement members 140 are then operated to release the engagement with the spike adapter 10. For example, two engagement members 140 are provided.

As shown in FIG. 8, the engagement member 140 is formed in a shape that is long in one direction. One end of the engagement member 140 is fixed to the opening 110a side of the housing 110 of the hole 115. The engagement member 140 is formed, for example, integrally with the housing 110. An engagement portion 141 that engages with the spike adapter 10 is provided at a midpoint in the longitudinal direction of the engagement member 140, and an operating portion 142 that is operated by the user is provided at the other end of the engagement member 140.

The engagement portion 141 engages with the connection portion 40 when the connection portion 40 is inserted into the housing 110 and the flow path member 150 of the infusion connector 100 is inserted into the spike adapter 10. The engagement portion 141 is configured to be disengaged from the connection portion 40 by operating the operation portion 142.

The operating unit 142 is disposed outside the body 112. For example, when the operating unit 142 is operated, specifically, when it is pressed inwardly of the body 112, the operating unit 142 moves toward the inside of the body 112 from the position before the operation.

As shown in FIG. 9, the flow path member 150 has a flow path L2 inside. The flow path member 150 is, for example, a needle member. The flow path member 150 is formed in a shape that opens at both ends. For example, the opening on the seal 180 side of the flow path member 150 is formed in a shape that opens on the side of the flow path member 150. One end of the flow path member 150 is fixed within the small diameter portion 120b of the connection member 120. The flow path member 150 communicates with the flow path L1 inside the connection member 120.

The head sleeve 160 is housed in the housing 110. The head sleeve 160 is formed in a cylindrical shape so as to be movable within the housing 110, as shown in FIG.
The stopper sleeve 170 is fixed to the outer circumferential surface of the head sleeve 160. The stopper sleeve 170 is formed to selectively restrict movement of the head sleeve 160 relative to the housing 110 and to selectively fix the head sleeve 160 to the spike adapter 10.

The needle seal 180 is provided in the stopper sleeve 170 as shown in FIG. 9. The needle seal 180 seals the opening at the tip side of the flow path member 150, in other words, the end side that is inserted into the spike adapter 10. The needle seal 180 is formed from a resin such as rubber or elastomer, and is formed so that it can seal the hole formed by the flow path member 150 liquid-tight and airtight by the restoring force after the flow path member 150 moves.

When the connection part 40 of the spike adapter 10 is inserted into the housing 110 and the head sleeve 160 moves toward the end wall part 111, the flow path member 150 penetrates the needle seal 180.

As shown in FIG. 9, the biasing member 190 is housed in the housing 110 and biases the head sleeve 160 toward the opening 110a of the housing 110. The biasing member 190 is, for example, a coil spring.

In the infusion connector 100 configured in this manner, when the connection portion 40 of the spike adapter 10 is inserted into the housing 110, the head sleeve 160 and the stopper sleeve 170 that are combined together move together with the spike adapter 10 within the housing 110 toward the end wall portion 111.

The head sleeve 160 and the stopper sleeve 170 are fixed to the spike adapter 10 as the flow path member 150 moves together with the connection part 40 to a position where it is inserted into the spike adapter 10. This fixing is achieved, for example, by an engaging part such as an arm member provided on the stopper sleeve 170 engaging with an engaged part such as a recess provided on the outer circumferential surface of the connection part 40.

In addition, when the head sleeve 160 and the stopper sleeve 170 are fixed to the connection portion 40 and the flow path member 150 is inserted into the spike adapter 10, when the spike adapter 10 is moved in a direction to be pulled out from the housing 110, the head sleeve 160, the stopper sleeve 170, and the connection portion 40 move together inside the housing 110 toward the opening side of the housing 110, due to the biasing member 190.

The connection between the head sleeve 160 and the stopper sleeve 170, which are integrally assembled, and the connection part 40 is released when the head sleeve 160 and the stopper sleeve 170 move to the end of the housing 110 on the opening 110a side and the flow path member 150 comes out of the spike adapter 10.

The spike adapter 10 and the infusion connector 100 configured in this manner constitute a connection structure 191.

Next, an example of the procedure for fluidly connecting the infusion bag 1 and the syringe 5 using the spike adapter 10 and the infusion connector 100 will be described in the following order: the procedure for connecting the spike adapter 10 and the infusion bag 1, the procedure for connecting the syringe 5 and the infusion connector 100, the procedure for connecting the spike adapter 10 connected to the infusion bag 1, and the procedure for connecting the infusion connector 100 to which the syringe 5 is connected.

First, an example of the operation of connecting the spike adapter 10 and the infusion bag 1 will be described. First, the user holds the grip portion 20 of the spike adapter 10 between multiple fingers. For example, the user places the thumb F on one groove 25 of the straight portion 24 of the grip portion 20 as shown in FIG. 4. The user also places the index and middle fingers on the other groove 25 of the straight portion 24. The user then holds the straight portion 24 between the thumb F, index finger, and middle finger. At this time, for example, a part of the thumb touches the curved outer surface 27a of the arch portion 27 on the spike portion 30 side. Also, for example, a part of the index finger touches the curved outer surface 27a of the arch portion 27 on the spike portion 30 side.

The user can connect the spike adapter 10 and the infusion bag 1 by holding the infusion bag 1 in his/her hand and inserting the spike portion 30 horizontally into the stopper 3. Alternatively, the user can insert the spike portion 30 from below upward into the stopper 3 while the infusion bag 1 is suspended.

Next, the user brings the tip of the spike portion 30 into contact with the stopper 3 of the infusion bag 1 .
12, the user presses the spike adapter 10 against the bag body 2 of the infusion bag 1 to insert the spike portion 30 into the stopper 3. When the spike portion 30 is inserted into the stopper 3 and the tip of the spike portion 30 is disposed inside the bag body 2, the flow path 50 of the spike adapter 10 communicates with the inside of the bag body 2. By inserting the spike portion 30 into the bag body 2, the connection work between the spike adapter 10 and the infusion bag 1 is completed.

Next, an example of the operation of connecting the syringe 5 and the infusion connector 100 will be described.
For example, the user aligns the tip of the nozzle 8 of the syringe 5 with one end of the large diameter portion 120 a of the connecting member 120 .

Next, the user, for example, rotates the syringe 5 to screw the threaded portion 122 of the connection member 120 into the threaded portion 8a on the inner surface of the nozzle 8, as shown in Figs. 13 and 14. The user rotates the syringe 5 until rotation of the syringe 5 relative to the connection member 120 is restricted. As the threaded portion 122 screws into the threaded portion 8a on the inner surface of the nozzle 8, the male luer 8b in the nozzle 8 is inserted into the female luer on the inner surface of the connection member 120. The user rotates the syringe 5 until the female luer and the male luer are completely joined, in other words, the outer peripheral surface of the male luer 8b comes into surface contact with the inner peripheral surface of the large diameter portion 120a of the connection member 120, sealing between these outer peripheral surfaces and inner peripheral surfaces, and rotation of the syringe 5 relative to the connection member 120 is restricted.

The force applied to the connection member 120 by rotating the syringe 5 is applied in a first direction. As a result, the regulating surface 131b of the teeth 131a of the gear 131 abuts against the abutment portion 132b of the claw 132. When the regulating surface 131b abuts against the abutment portion 132b, the abutment portion 132b and the regulating surface 131b engage in a direction intersecting the protruding direction of the convex portion 116b relative to the first end surface 116a of the first case 116. As a result, the rotation of the connection member 120 in the first direction, which is the same direction as the direction in which the syringe 5 is screwed, is regulated.

The connection operation between the syringe 5 and the infusion connector 100 is completed by rotating the syringe 5 to the end. Note that, here, rotating the syringe 5 to the end means that the rotation of the syringe 5 is restricted by the ratchet 130 and the syringe 5 is rotated to a position where it cannot rotate any further.

The ratchet 130 allows a second rotation, which is a rotation in the same direction as the rotation in the direction to remove the syringe 5. Therefore, according to the infusion connector 100, even if the syringe 5 is rotated in an attempt to remove it from the infusion connector 100, the syringe 5 and the connecting member 120 rotate together, preventing the syringe 5 from being removed.

Next, an example of the process of connecting the spike adapter 10 connected to the infusion bag 1 and the infusion connector 100 connected to the syringe 5 will be described.

The user first grasps the gripping portion 20 of the spike adapter 10 with one hand and grasps the housing 110 of the infusion connector 100 with the other hand. The user holds the gripping portion 20 of the spike adapter 10 between the thumb, index finger, and middle finger of one hand, for example, as described above. For example, part of the thumb touches the curved outer surface of the arch portion on the connection portion 40 side. For example, part of the index finger touches the curved outer surface of the arch portion on the connection portion 40 side.

For example, the user places the thumb of the other hand on the third indicator 119a and the index finger and middle finger on the rectangular portion 114b of the housing 110. Then, the user grasps the housing 110 by pinching it between the thumb, index finger, and middle finger.

Next, the user aligns the spike adapter 10 and the infusion connector 100 as shown in FIG. 15. Specifically, the user aligns the spike adapter 10 and the housing 110 so that the first indicator 45 and the second indicator 118 are aligned in the direction of insertion of the connection part 40 into the opening 110a of the housing 110.

Next, the user, for example, presses the spike adapter 10 toward the infusion connector 100, and then presses the infusion connector 100 toward the spike adapter 10, thereby inserting the connection portion 40 into the housing 110 through the opening 110a.

The connection part 40 is fixed to the stopper sleeve 170 by being inserted into the housing 110. Then, when the connection part 40 is moved until the flow path member 150 penetrates the seal 42 and is positioned in the flow path 50, the connection part 40 engages with the engagement part 141 of the engagement member 140, and the connection part 40 is fixed to the housing 110.

When the connection part 40 is fixed to the housing 110, an example of the process of fluidly connecting the infusion bag 1 and the syringe 5 using the spike adapter 10 and the infusion connector 100 is completed.

Next, in the unlikely event that it becomes necessary to remove the syringe 5 from the infusion connector 100, an example of the procedure for removing the syringe 5 from the infusion connector 100 will be described.

When removing the syringe 5 from the connection member 120, the user presses the outer surface 132a1 of the body 132a of the claw 132 with a finger. Here, pressing the outer surface 132a1 with a finger means pressing the outer surface 132a1 with a force sufficient to prevent the claw 132 from moving outward when the syringe 5 is rotated in the second direction to remove the syringe 5 from the infusion connector 100. Pressing the body 132a with a finger prevents the body 132a from bending outward from the housing 110. Preventing the body 132a from bending outward from the housing 110 prevents the riding surface 131c from riding over the abutment portion 132b. As a result, the rotation of the gear 131 in the second direction is restricted.

The user presses the main body 132a to restrict rotation of the gear 131 in the second direction, and rotates the syringe 5 in the second direction in which it is removed from the connecting member 120. By restricting rotation of the gear 131 in the second direction, even if the syringe 5 is rotated in the direction in which it is removed from the connecting member 120, the connecting member 120 does not rotate together with the syringe 5. By rotating the syringe 5 until it is separated from the connecting member 120, the operation of removing the syringe 5 from the connecting member 120 is completed.

The gripping portion 20 of the spike adapter 10 configured in this manner has a straight portion 24 formed in the center in the longitudinal direction of the gripping portion 20, and arch portions 27 are formed on both sides of the straight portion 24 in the longitudinal direction of the gripping portion 20.

The straight portion 24 can be gripped by the user when gripping the spike adapter 10. The straight portion 24 is formed in a shape parallel to the longitudinal direction of the gripping portion 20, so that the straight portion 24 fits comfortably with the user's fingers. Here, "fits comfortably" includes a small load on the fingers. In other words, the load on the fingers can be reduced when the user pinches the gripping portion 20 between their fingers.

Furthermore, the arch portion 27 is formed in a curved shape such that the height from the straight portion 24 increases as the arch portion 27 moves away from the straight portion 24. For this reason, when a user holds the straight portion 24 between multiple fingers including the thumb, a part of the thumb abuts on the curved outer surface of the arch portion 27, and other fingers abutting the straight portion 24, for example, a part of the index finger abuts on the curved outer surface of the arch portion 27. Alternatively, when a user holds the straight portion 24 and presses the spike adapter 10 toward the bag body 2 when connecting the spike adapter 10 to the infusion bag 1 with the fingers not touching the arch portion 27, if the thumb and index finger are misaligned with respect to the straight portion 24, a part of the thumb and a part of the index finger abut on the curved outer surface of the arch portion 27.

Therefore, even if the spike adapter 10 is pressed against the bag body 2 when connecting the spike adapter 10 to the infusion bag 1, a part of the thumb and a part of the index finger come into contact with the curved outer surface of the arch portion 27, preventing the fingers from slipping. Furthermore, the arch portion 27 is formed in a curved shape, so that the fingers can easily contact the arch portion 27. This makes it easy to connect the spike adapter 10 to the infusion bag 1. Similarly, since the fingers can be prevented from slipping when the spike adapter 10 is pressed against the infusion connector 100, it is easy to connect the spike adapter 10 to the infusion connector 100.

In this way, the spike adapter 10 has a gripping portion 20 with a straight portion 24 and an arch portion 27, making it easy to connect the spike adapter 10 to the infusion bag 1 or infusion connector 100 that is to be connected.

Furthermore, the grip portion 20 has grooves 25 formed at symmetrical positions in the circumferential direction of the peripheral surface of the grip portion 20. By having the grooves 25 in the grip portion 20, even when the spike adapter 10 is molded by injection molding, it is possible to prevent injection molding defects such as sink marks. Furthermore, since the thickness portion of the grip portion 20 that constitutes the inner surface 25b of the grooves 25 functions as a rib, it is possible to maintain the strength of the grip portion 20 even if the grooves 25 are formed in the grip portion 20.

Furthermore, in the straight portion 24, the width dimension of the groove 25 is greater than the depth dimension of the groove 25. Therefore, as shown in FIG. 4, even if the user places his/her finger in the groove 25 when gripping the grip portion 20, a part of the finger abuts against the bottom surface 25a of the groove 25, thereby reducing the burden on the finger.

Furthermore, the area 28 between one groove 25 and the other groove in the circumferential direction of the circumferential surface of the straight portion 24 of the grip portion 20 is formed as a curved surface. Therefore, even if the user grips the grip portion 20 by pinching the area 28, the curved surface of the area 28 can reduce the strain on the fingers.

In addition, curved arch portions 29 are formed on both sides of region 28, which become higher as they move away from straight portion 24. When a user pinches region 28, part of the fingers come into contact with tip surface 29a. Alternatively, when a user pinches region 28 with multiple fingers and connects spike adapter 10 to an infusion bag with the fingers not in contact with arch portions 29, even if the fingers slip from grip portion 20 when the user is working, part of the fingers will come into contact with arch portions 29, preventing the fingers from slipping further.

In this way, when connecting the spike adapter 10 to the infusion bag 1, part of the finger comes into contact with the arch portion 29, preventing the finger from slipping. This makes it easier to connect the spike adapter 10 to the infusion bag 1. The same is true when connecting the spike adapter 10 to the infusion connector 100. Furthermore, the arch portion 29 is formed in a curved shape, which allows the finger to come into good contact with the arch portion 29.

The spike adapter 10 further has a second flange 22 at the other end of the gripping portion 20. The dimension of the second flange 22 in the direction perpendicular to the longitudinal direction of the gripping portion 20 is larger than the connection portion 40. This ensures that the user does not feel uneasy about the connection between the spike adapter 10 and the infusion connector 100. The effect of this will be described in detail below.

In this embodiment, the flow path 50 is positioned eccentrically relative to the center of the connection portion 40. For this reason, if the second flange 22 is formed, for example, in a shape symmetrical with respect to the axis of the grip portion 20, for example, in a circular shape centered on the axis of the grip portion 20, the dimension of the second flange 22 in a direction perpendicular to the longitudinal direction of the grip portion 20 becomes smaller than that of the connection portion 40. As a result, when the second flange 22 is viewed from the first flange 21 side along the longitudinal direction of the grip portion 20, a part of the connection portion 40 is exposed through the second flange 22. In this structure, even when the connection portion 40 is connected to the infusion connector 100, a part of the connection portion 40 is exposed through the second flange 22.

Typically, when two components are connected to each other by inserting one into the other, the opening of the other component is covered by one component and the portion of the one component that is inserted into the other component is not exposed, so that the user does not become unsure about the connection between the two components when one component is inserted into the other.

However, in a configuration in which the flow path 50 in the connection part 40 is positioned eccentrically from the center of the connection part 40, as in this embodiment, the grip part 20 is positioned eccentrically with respect to the connection part 40. Therefore, if the second flange 22 is made symmetrical about the axis of the grip part 20, a part of the connection part 40 will be exposed through the second flange 22.

Therefore, even if the connection part 40 is properly connected to the infusion connector 100, a part of the connection part 40 is exposed through the second flange 22, which may cause the user to worry that the connection between the connection part 40 and the infusion connector 100 is not properly connected.

However, in this embodiment, the dimension of the second flange 22 perpendicular to the longitudinal direction of the gripping portion 20 is larger than the connection portion 40, so the connection portion 40 is not exposed through the second flange 22, preventing the user from feeling uneasy.

Furthermore, a first indicator 45 is formed by printing on the outer surface of the connection part 40 of the spike adapter 10. The first indicator 45 has a color different from that of the connection part 40. Then, a second indicator 118 is formed by printing on the opening 110a side of the outer surface of the housing 110 of the infusion connector 100. The second indicator 118 has a color different from the surroundings.

Therefore, the user can easily recognize the indicators 45 and 118. Furthermore, by aligning the first indicator 45 and the second indicator 118 so that they are aligned in the direction of insertion of the connection part 40 into the opening 110a, the circumferential position of the spike adapter 10 relative to the infusion connector 100 can be easily adjusted to the posture for inserting the connection part 40 into the opening 110a. Furthermore, the third indicator 119a is printed on the outer surface of the housing 110 at a position that avoids the engagement member 140, which prevents the user from operating the operation part 142 of the engagement member 140 when inserting the connection part 40 into the opening 110a. Furthermore, the third indicator 119a has a different color from the housing 110, which makes it easier for the user to recognize the third indicator 119a.

In this way, the connection structure 191 including the spike adapter 10 and the infusion connector 100 can easily align the spike adapter 10 with the infusion connector 100 while preventing the user from operating the operating part 142. As a result, the connection work between the spike adapter 10 and the infusion connector 100 can be easily performed.

Furthermore, the third indicator 119a is formed at a position aligned with the second indicator 118 in the insertion direction of the connection portion 40 in the opening 110a. The third indicator 119a indicates the position for placing the user's thumb. Therefore, when the user holds the housing 110 with his or her thumb against the third indicator 119a, the area of the housing 110 where the thumb is placed is located around the user, and the second indicator 118 is located in front of the user. Therefore, the user can easily recognize the second indicator 118 when holding the housing 110.

Furthermore, the infusion connector 100 has a protruding fourth indicator 119b around the third indicator 119a, which surrounds the area where the user's thumb F is placed. Therefore, the fourth indicator 119b also functions as an anti-slip device for the thumb F, preventing the thumb F from slipping during the operation of connecting the spike adapter 10 and the infusion connector 100.

Furthermore, since both the first indicator 45 and the third indicator 119a indicate the position of the user's thumbs, the user can connect the spike adapter 10 and the infusion connector 100 in a relatively comfortable position with the thumbs of both hands facing forward.

Furthermore, the first indicator 45 and the second indicator 118 are formed in the same shape and have the same color. This makes it easy for the user to recognize the combination of the first indicator 45 and the second indicator 118.

Furthermore, the first indicator 45 is formed in a triangular shape, with one vertex located closer to the tip of the connection portion 40 than the other two vertices. The second indicator 118 is formed in a triangular shape, with one vertex located closer to the opening 110a than the other two vertices. Thus, the first indicator 45 and the second indicator 118 each have the function of indicating the direction of pressure on the infusion connector 100 or spike adapter 10, which is the connection partner, when connecting the spike adapter 10 and the infusion connector 100. Therefore, it is easy for the user to recognize that the spike adapter 10 should be pressed in the direction indicated by the first indicator 45, and the infusion connector 100 should be pressed in the direction indicated by the second indicator 118.

In this way, according to this embodiment, it is possible to provide a spike adapter 10 that can be easily connected to a connection partner, and a connection structure that can easily connect the spike adapter 10 to a connection partner.

In the above example, the ratchet 130 has a pawl 132 that includes a body 132a, an abutment portion 132b, and a rib 132c, and the body 132a is formed in a shape that extends along the circumferential direction of the housing 110. However, the present invention is not limited to this.

In another example, as shown in FIG. 16, the claw 132 may be configured to extend linearly toward the gear 131. In this configuration, the claw 132 may not include the abutment portion 132b and the rib 132c.

In the above example, the case where the housing 110 has the hole 116c is described as an example, but the present invention is not limited to this. For example, if the claw 132 can be molded integrally with the housing 110 using a mold even if the housing 110 does not have the hole 116c, the housing 110 may have a configuration that does not have the hole 116c.

In the above example, the spike adapter 10 may be configured not to include the first indicator 45. Even if the spike adapter 10 is configured not to include the first indicator 45, the spike adapter 10 can be easily connected to the infusion bag 1 by having the straight portion 24 and the arch portion 27. Furthermore, the spike adapter 10 can be easily connected to the infusion connector 100.

Alternatively, it is possible to connect and use the spike adapter 10 to an infusion connector 100 that does not have the second indicator 118, the third indicator 119a, and the fourth indicator 119b. Alternatively, it is possible to connect and use the spike adapter 10 that does not have the first indicator 45 to an infusion connector 100 that does not have the second indicator 118, the third indicator 119a, and the fourth indicator 119b.

In the above example, the spike adapter 10 is connected to the infusion connector 100 as an example, but is not limited thereto. In another example, as shown in FIG. 17, the spike adapter 10A may have a configuration that fluidly connects the infusion bag 1 and the infusion connector 100 and connects to the infusion bag 1 and other connection destinations. The spike adapter 10A is, for example, a so-called bag adapter. The other connection destinations are devices or components that are fluidly connected to the infusion bag 1. Note that in the spike adapter 10A, components that have the same functions as the spike adapter 10 are given the same reference numerals as the spike adapter 10 and will not be described.

Figure 17 is a perspective view showing the configuration of the spike adapter 10A. As shown in Figure 17, the spike adapter 10A includes a spike portion 30, a first connecting portion 40, a second connecting portion 195, and a flow path 50A.

The first connection part 40 is connected to the infusion connector 100. The first connection part 40 has, for example, the same configuration as the connection part 40 inserted into the housing 110 of the spike adapter 10.

The second connection part 195 is connected to a connection partner other than the infusion bag 1. This connection partner is a device that supplies fluid to the infusion bag 1 via the spike adapter 10A, or to which fluid is supplied from the infusion bag 1 via the spike adapter 10A. Alternatively, it may be a member through which fluid moves, such as a tube.

The flow path 50A includes a flow path 50 and a flow path 51. The flow path 51 is formed in the spike portion 30 and the second connecting portion 195. One end of the flow path 51 opens at the tip of the spike portion 30. The other end of the flow path 52 is sealed by a seal provided in the second connecting portion 195.

The spike adapter 10A has a first connection part 40 connected to the infusion connector 100 and a spike part 30 connected to the infusion bag 1, so that the infusion connector 100, the first connection part 40, and the spike part 30 form a flow path that fluidly connects the syringe 5 and the infusion bag 1.

The spike adapter 10A has the spike portion 30 connected to the infusion bag 1, and the second connection portion 195 connected to a connection other than the infusion bag 1, so that the flow path 51 is fluidly connected to the infusion bag 1 and the connection other.

The spike adapter 10A includes a first connecting portion 40 having a first indicator 45, which makes it possible to easily connect the spike adapter 10A and the infusion connector 100. Note that the connecting portion 40 of the spike adapter 10 may be configured not to include the first indicator 45, for example. In other words, it is possible to connect and use the spike adapter 10A that does not include the first indicator 45 to the infusion connector 100.

In the above example, the spike adapter 10 and the infusion connector 100 are described as examples of a configuration for fluidly connecting the infusion bag 1, which is an example of an infusion container, and the syringe 5, but this is not limiting.

In another example, as shown in Figs. 18 to 21, a spike adapter 10B and a syringe adapter 200 may be used as a configuration for fluidly connecting a container 9 such as a vial, which is an example of an infusion container, and a syringe 5. The container 9 has a cylindrical body 9a with a bottom and a plug 9b that closes the opening of the body 9a. The spike adapter 10B is, for example, a so-called vial adapter. The syringe adapter 200 is an example of a connector.

Figure 18 is a front view showing the configuration of the syringe adapter 200. Figure 19 is a side view showing the configuration of the syringe adapter 200. Figure 20 is a cross-sectional view showing the spike adapter 10B connected to the syringe adapter 200. Figure 21 is an explanatory diagram showing the spike adapter 10B connected to the container 9. Figure 21 shows the main parts of the spike adapter 10B, specifically, the fixing part 206.

For the spike adapter 10B, components that have the same functions as the spike adapter 10 are given the same reference numerals as the spike adapter 10 and their descriptions are omitted.For the syringe adapter 200, components that have the same functions as the infusion connector 100 are given the same reference numerals as the infusion connector 100 and their descriptions are omitted.

As shown in Figures 20 and 21, the spike adapter 10B includes a spike portion 30, a connection portion 40, a flow path 50B, and a fixing portion 206 that is fixed to a container.
The flow path 50B includes a flow path 50 and a flow path 52. One end of the flow path 51 opens into the tip of the spike portion 30. The other end of the flow path 52 opens into the opening 44 of the connection portion main body 41. The other end of the flow path 52 is sealed by the seal 42.

As shown in FIG. 20, a pair of fixing parts 206 are formed. The fixing parts 206 are formed, for example, in an arm shape. The fixing parts 206 are formed, for example, at the end of the connection part 40 on the spike part 30 side, and are arranged at positions 180 degrees apart.

The fixing portion 206 includes, for example, an arm portion 206a that is fixed to the end of the connection portion 40 on the spike portion 30 side, and an engagement portion 206b that is provided on the arm portion 206a.

The engagement portion 206b has a guide surface 206b1 that faces the spike portion 30. The guide surface 206b1 is formed on a surface that moves away from the spike portion 30 from one end on the connection portion 40 side toward the other end.

When the spike portion 30 is inserted into the plug 9b of the container 9 and the spike adapter 10B is pushed into the container 9, the pair of guide surfaces 206b1 come into contact with the opening of the container 9, spreading the pair of fixing portions 206. Then, when the guide surfaces 206b1 overcome the opening of the container 9, one end of the engagement portion 206b on the connection portion 40 side engages with the neck portion 9a1 of the container 9, as shown in FIG. 21.

The spike adapter 10B is fixed to the container 9 by inserting the spike portion 30 into the plug 9b and positioning one end of the flow paths 50, 52 inside the body 9a, and then engaging portion 206b of the fixing portion 206 engages with the neck portion 9a1 as shown in FIG. 21.

As shown in Figures 18 to 21, the syringe adapter 200 includes, for example, a housing 110A, a connecting member 120 rotatably supported by the housing 110A, a ratchet 130, and an engaging member 140 that fastens and releases the housing 110A and the spike adapter 10B.

The syringe adapter 200 also includes a flow path member 150 provided in the housing 110A, a cylindrical head sleeve 160 movably stored in the housing 110A, a needle seal 180 fixed to the head sleeve 160, a stopper sleeve 170 configured to selectively fix the head sleeve 160 to the housing 110A and selectively fix the head sleeve 160 to the spike adapter 10A, a biasing member 190 that biases the head sleeve 160 in a direction to move it out of the housing 110A, an air bag 201, and a gas flow path 202 that communicates with the air bag 201 and can be connected to the spike adapter 10A.

The housing 110A includes an end wall portion 111, a body portion 112, a support wall portion 113, and an air bag storage portion 205. The air bag storage portion 205 stores the air bag 201 therein. The air bag storage portion 205 is formed integrally with, for example, the rectangular portion 114b on the opposite side to the cylindrical portion 114a. In this embodiment, the cylindrical portion 114a of the body portion 112 has a second indicator 118, and does not have a third indicator 119a or a fourth indicator 119b.

The gas flow path 202 includes, for example, a gas needle 203 and a flow path portion 204 that fluidly connects the gas needle 203 and the air bag 201. The gas needle 203 is sealed by a seal 180, for example, in the same manner as the flow path member 150.

When the connection part 40 of the spike adapter 10B is inserted into the opening 110a of the housing 110A of the syringe adapter 200, the flow path member 150 penetrates the seals 180 and 42 and is inserted into the flow path 51, thereby communicating with the flow path 50. When the connection part 40 is inserted into the opening 110a, the gas needle 203 penetrates the seals 180 and 42 and is inserted into the flow path 51, thereby communicating with the flow path 51.

Such a syringe adapter 200, together with the spike adapter 10B, constitutes a flow path that connects the container and the syringe 5. Also, the syringe adapter 200, together with the spike adapter 10B, constitutes a flow path that connects the container and the air bag 201.

In such a syringe adapter 200, when the volume of the contents, such as the medicine and air, in the container increases by, for example, transferring a medicine or the like from the syringe 5 to the container, the air in the container moves to the air bag 201 via the flow path 51 and the flow path section 204, thereby keeping the pressure in the container constant.

The syringe adapter 200 also has a second indicator 118 on the cylindrical portion 114a of the housing 110A, which is common to the housing 110 of the infusion connector 100. This makes it easy for the user to find the location of the second indicator 118.

In addition, in such a connection structure having the spike adapter 10B and the syringe adapter 200, since the spike adapter 10B has a fixing portion 206, when the spike adapter 10B is connected to the syringe adapter 200, the position of the spike adapter 10B relative to the syringe adapter 200 is such that the fixing portion 206 does not interfere with the syringe adapter 200. Therefore, by aligning the first indicator 45 and the second indicator 118, the user can connect the spike adapter 10B and the syringe adapter 200 in a position where the fixing portion 206 does not interfere with the syringe adapter 200.

In the modified examples shown in Figs. 18 to 21, the syringe adapter 200 is shown to have a configuration including the second indicator 118 as an example, but is not limited to this. In other examples, the syringe adapter 200 may not have the second indicator 118. Or, the spike adapter 10B may not have the first indicator 45.

The spike adapter 10B may also be connected to the infusion connector 100. The spike adapter 10A may also be connected to the syringe adapter 200.

In the above example, the infusion connector 100 and the syringe adapter 200 are described as being configured to connect to a syringe 5 as an example, but are not limited thereto. In another example, an infusion set 210 may be connected as shown in Figures 22 and 23. Figure 22 is a perspective view showing a configuration in which the infusion set 210 is connected to the infusion connector 100. Figure 23 is a cross-sectional view showing the main parts of the infusion connector 100 and the infusion set 210.

As shown in Figures 22 and 23, the infusion set 210 includes at least a tube 211. In this modified example, the infusion set 210 includes a tube 211 and a connection portion 212.

One end 213 of the tube 211 is connected to the connection member 120. Specifically, the end 213 is inserted into the large diameter portion 120a and fixed to the large diameter portion 120a, as shown in Figures 22 and 23. The end 213 is fixed in the large diameter portion 120a by, for example, adhesion with an adhesive or by a fixing means such as welding. The tube 211 may have, for example, an adjustment portion 211a that adjusts the amount of fluid flowing through the tube 211.

The connection part 212 is provided at the other end of the tube 211. The connection part 212 is configured to be able to fluidly connect the tube 211 to a connection destination. The connection part 212 is, for example, a luer lock.

As a modified example of the infusion set 210, as shown in FIG. 24, the tube 211 may be configured to have one or more branched flow path sections 214. FIG. 24 shows a configuration in which the tube 211 has one flow path section 214. The tube 211 may also be provided with a valve 215 that selects a flow path that communicates with the infusion connector 100. The valve 215 is configured to be switchable between a state in which the infusion connector 100 communicates with one of the flow path sections 214 and the infusion connector 100 and the connection section 212 are blocked, and a state in which the infusion connector 100 and the flow path section 214 are blocked and the infusion connector 100 and the connection section 212 are connected.

Furthermore, the flow path section 214 branching off from the tube 211 may be provided at its end with a connection section 216 that can connect the flow path section 214 to a destination. The connection section 216 may be, for example, a luer lock as shown in FIG. 24. Alternatively, the connection section 216 may be a bottle needle as shown in FIG. 25.

In the above example, the tube 211 of the infusion set 210 is inserted into the large diameter portion 120a and fixed to the large diameter portion 120a, but this is not limiting. In another example, as shown in Figures 26 and 27, the large diameter portion 120a may be fixed within the end portion 213. The large diameter portion 120a is fixed within the end portion 213 by, for example, adhesion with an adhesive or welding.

Alternatively, as shown in FIG. 28, the connection part 40 may be formed in a shape that does not have a portion that is disposed outside the housing 110, but is disposed inside the housing 110. As an example of this, for example, the large diameter part 120a of the connection member 120 has a length that does not extend outside the housing 110 in the axial direction. Then, the end 213 of the tube 211 may be fixed inside the connection part 40 as shown in FIG. 23, or may be fixed with the connection part 40 disposed inside as shown in FIG. 27.

In the above example, the infusion connector 100 and the syringe adapter 200 are described as having a ratchet 130 as an example, but are not limited to this. In another example, the infusion connector 100 and the syringe adapter 200 may be configured not to have a ratchet 130, as shown in FIG. 29 as an example of the infusion connector 100.

The present invention is not limited to the above-described embodiment, and various modifications can be made in the implementation stage without departing from the gist of the invention. The embodiments may be implemented in appropriate combination, in which case the combined effects can be obtained. Furthermore, the above-described embodiment includes various inventions, and various inventions can be extracted by combinations selected from the multiple constituent elements disclosed. For example, if the problem can be solved and an effect can be obtained even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the configuration from which the constituent elements are deleted can be extracted as an invention.

1...infusion bag, 2...bag body, 3...stopper, 5...syringe, 6...outer cylinder, 7...push member, 8...cylinder tip, 10...spike adapter, 10A...spike adapter, 10B...spike adapter, 20...grip portion, 21...first flange, 22...second flange, 24...straight portion, 25...groove, 27...arch portion, 28...area, 29...arch portion, 30...spike portion, 40...connection portion, 41...connection portion body, 45...first indicator, 50...flow path, 50A...flow path, 50B...flow path, 51...flow path, 52...flow path, 100...infusion connector, 110...housing, 110a...opening, 116...first case, 117...second case, 118...second indicator, 119a...third indicator, 119b...fourth indicator, 120...connecting member, 130...ratchet, 131...gear, 132...claw, 140...engaging member, 141...engaging portion, 142...operating portion, 150...flow path member, 160...head sleeve, 170...stopper sleeve, 180...needle seal, 190...urging member, 191...connecting structure, 195...second connecting portion, 200...syringe adapter, 201...air bag, 202...gas flow path, 203...gas needle, 204...flow path portion, 205...air bag storage portion, 210...infusion set, 211...tube, 211a...adjusting portion, 212...connecting portion, 213...end, 214...flow path portion, 215...valve, 216...connecting portion, F...thumb.

Claims (10)

A spike adapter for fluidly connecting an infusion container and a device together with a connector for connecting to the device, comprising:
a gripping portion formed in a long shape in one direction, the gripping portion including a straight portion formed toward the center in the longitudinal direction of the circumferential surface and parallel to the longitudinal direction, and curved arch portions formed on both ends of the straight portion in the longitudinal direction and increasing in height from the straight portion as the arch portions move away from the straight portion;
a spike provided at one end of the gripping portion and adapted to be inserted into the infusion container;
a connecting portion provided at the other end of the gripping portion and inserted into the connector;
a flow path formed in the spike portion, the grip portion, and the connection portion, connecting the infusion container and the connector;
Equipped with a spike adapter. The spike adapter according to claim 1, wherein the arch portion is a rib. The spike adapter according to claim 1, wherein the gripping portions are formed at symmetrical positions in the circumferential direction of the peripheral surface, and grooves are formed extending from one end to the other end in the longitudinal direction. The spike adapter according to claim 1, wherein the gripping portion has a first flange formed at one end on the spike portion side and larger than the spike portion in the longitudinal direction, and a second flange formed at the other end and larger than the connecting portion in the longitudinal direction. The spike adapter according to claim 1, further comprising a spike adapter indicator formed by printing on the outer surface of the connection part, having a color different from that of the connection part, and used for alignment with the connector indicator of the connector. a spike adapter including a grip portion, a spike portion provided on the grip portion and inserted into an infusion container, a connection portion provided on the grip portion, and a first indicator formed by printing on the connection portion and having a color different from the surrounding area;
a connector including a cylindrical housing having an opening into which the connection part is inserted, an operation part provided on the housing so as to be operable from outside the housing, a second indicator formed by printing on the outer surface of the housing facing the opening, having a color different from that of the housing, and aligned with the first indicator in an insertion direction in which the connection part is inserted into the opening, and a third indicator formed by printing on the outer surface of the housing at a position avoiding the operation part, having a color different from that of the housing, and indicating a position where a user places his or her thumb;
Equipped with
the grip portion is formed in a shape long in one direction, and includes a straight portion formed toward the center in the longitudinal direction of the peripheral surface and parallel to the longitudinal direction, and curved arch portions formed on both ends of the straight portion in the longitudinal direction and increasing in height from the straight portion as the arch portions move away from the straight portion,
The spike portion is provided at one end of the grip portion,
the connecting portion is provided at the other end of the gripping portion and is inserted into the connector,
The spike adapter is a connection structure having a flow path formed in the spike portion, the grip portion and the connection portion, which connects the infusion container and the connector . The connection structure according to claim 6, wherein the third indicator is aligned with the second indicator in the axial direction of the housing. The connection structure according to claim 6, wherein a protruding fourth indicator is formed around the third indicator on the outer surface and surrounds the area where the user's thumb is placed. The connection structure according to claim 6, wherein the first indicator and the second indicator are formed in the same shape. The first indicator is formed in a triangular shape with one apex being located closer to the tip end of the connection portion than the other two apexes,
The second indicator is formed in a triangular shape with one apex being located closer to the opening than the other two apexes.
The connection structure according to claim 9.