Syringe, lancet assembly and puncturing device

Abstract

The present invention provides a syringe capable of safely functioning. In one embodiment of the present invention, a syringe capable of being filled with a lancet assembly is provided, the syringe being configured to have a housing composed of at least two sub-parts that can be detached from each other and extend in a piercing direction, one end portion and the other end portion of each of the sub-portions in a direction different from the puncture direction are respectively bound by a binding member.

Description

[0001] This application is a divisional application of the invention patent application with Chinese application number 202110377705.5 (the original application is titled "Syringe, Lancet Assembly and Puncturing Device", and the filing date of the original application is April 8, 2021). Technical Field

[0002] The present invention relates to a syringe, a lancet assembly and a puncturing device. Background Art

[0003] A puncturing device is used for micro-collecting blood from a patient, such as a diabetic patient, thereby measuring the blood glucose value. The puncturing device is configured to have a syringe capable of loading a lancet assembly and a lancet assembly capable of being loaded into the syringe. The lancet assembly includes a lancet configured to have a puncturing member for puncturing a predetermined part of the body. The syringe has a function of launching the lancet toward the predetermined part.

[0004] In use, after loading the lancet assembly into the syringe, by the action of the spring compressed in the syringe extending, the lancet is launched toward the predetermined part. Thereby, the puncturing member of the lancet can puncture a predetermined part of the patient's body, thereby collecting blood.

[0005] Patent Document 1: U.S. Patent Specification No. 5385571

[0006] As described above, since the puncturing device is used to puncture a predetermined part of the body with the puncturing member of the lancet to collect blood, both the syringe and the lancet assembly as its constituent elements are required to function safely. Summary of the Invention

[0007] In view of such a situation, an object of the present invention is to provide a syringe and a lancet assembly that can function safely.

[0008] To achieve the above object, in one embodiment of the present invention,

[0009] A syringe is provided, which can be loaded with a lancet assembly,

[0010] The syringe is configured to have a housing, which is composed of at least two sub-parts that can be disassembled from each other and extend along the puncturing direction,

[0011] One end of each sub-part in a direction different from the above puncturing direction is respectively constrained by a constraining member with the other end.

[0012] To achieve the above object, in one embodiment of the present invention,

[0013] Provided is a syringe that can be loaded with a lancet assembly.

[0014] The syringe is configured to have an ejector for ejecting the loaded lancet assembly.

[0015] The ejector is configured to have an ejector main body and an ejector knob.

[0016] The ejector knob can rotate axially independently of the ejector main body.

[0017] To achieve the above object, in one embodiment of the present invention,

[0018] Provided is a lancet assembly that can be loaded into a syringe.

[0019] The lancet assembly includes a lancet, a lancet engaging member, and a lancet housing that houses the lancet and the lancet engaging member.

[0020] The lancet is configured to have a lancet body, a lancet cap, and a puncturing member.

[0021] The lancet engaging member is configured to have mutually separated and opposed side portions, and the lancet body is disposed between the separated and opposed side portions so as to be movable in the puncturing direction or in the direction opposite to the puncturing direction. The lancet body is configured to have two mutually opposed side portions, and is configured to have a locking portion on at least one of the two side portions.

[0022] At least one of the inner side surfaces of the two mutually opposed side portions of the lancet engaging member is configured to have a locked portion that can be locked with the locking portion of the lancet body.

[0023] When a force acting on the lancet body causes it to move rearward relative to the lancet engaging member in the direction opposite to the puncturing direction, the locking portion of the lancet body can be locked with the locked portion of the lancet engaging member.

[0024] To achieve the above object, in one embodiment of the present invention,

[0025] Provided is a lancet assembly that can be loaded into a syringe.

[0026] The lancet assembly includes a lancet, a lancet engaging member, and a lancet housing that houses the lancet and the lancet engaging member.

[0027] The lancet is configured to have a lancet body, a lancet cap, and a puncturing member.

[0028] The puncturing member straddles the lancet body and the lancet cap and is present therein. The front end portion of the puncturing member is covered by the lancet cap, and the lancet cap and the lancet body are integrally joined via a connecting member.

[0029] The lancet engaging member is provided in a state where it can abut against the lancet cap.

[0030] The lancet engaging member is configured to have side portions that are separated and opposed to each other, and the lancet body is provided between the separated and opposed side portions so as to be movable in the puncturing direction or in the direction opposite to the puncturing direction.

[0031] The above-mentioned lancet cap is configured to have a main cap portion and a protruding portion continuous with at least one of the main cap portions in a top view.

[0032] The side portion of the lancet engaging member is configured to have a concave portion that can accommodate the protruding portion of the lancet cap.

[0033] The above-mentioned syringe is configured to have a push rod that can engage with the rear end portion of the lancet body and eject the lancet body in the puncturing direction. Before loading into the above-mentioned syringe, the lancet housing and the lancet are locked.

[0034] When the lancet body is engaged with the push rod to load the lancet assembly, the lancet engaging member moves relative to the lancet in the forward puncturing direction. The lancet cap is pressed by the lancet engaging member, and the connecting member is broken, causing the lancet cap to separate from the lancet body. The separated lancet cap can move within the lancet housing to a position deviating from the puncturing track of the puncturing member.

[0035] The protruding portion of the lancet cap that has completed the above-mentioned movement is received in the concave portion provided on the side portion of the lancet cap.

[0036] To achieve the above object, in one embodiment of the present invention,

[0037] There is provided a lancet assembly that can be loaded into a syringe.

[0038] The lancet assembly includes a lancet, a lancet engaging member, and a lancet housing that houses the lancet and the lancet engaging member.

[0039] The lancet is configured to have a lancet body, a lancet cap, and a puncturing member.

[0040] The puncturing member straddles the lancet body and the lancet cap and is present therein. The front end portion of the puncturing member is covered by the lancet cap, and the lancet cap and the lancet body are integrally joined via a connecting member.

[0041] The lancet engaging member and the lancet cap are provided in a state where they can abut against each other.

[0042] The lancet engaging member is configured to have side portions that are separated and opposed to each other. At least the lancet engaging member and the lancet housing are configured to include a slidable resin so that between the separated and opposed side portions, the side portions of the lancet engaging member can slide in the puncture direction or in the direction opposite to the puncture direction within the lancet housing.

[0043] According to an embodiment of the present invention, a syringe and a lancet assembly that can function safely can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 FIG. is a perspective view schematically showing a puncture device according to an embodiment of the present invention.

[0045] Figure 2 FIG. is a perspective view schematically showing a lancet assembly according to an embodiment of the present invention.

[0046] Figure 3A FIG. is a perspective view schematically showing a lancet housing as a component of the lancet assembly.

[0047] Figure 3B FIG. is a cross-sectional view schematically showing a lancet housing as a component of the lancet assembly.

[0048] Figure 4A FIG. is a perspective view schematically showing a lancet as a component of the lancet assembly.

[0049] Figure 4B FIG. is a perspective view schematically showing the back side of a lancet as a component of the lancet assembly.

[0050] Figure 5A FIG. is a perspective view schematically showing a lancet engaging member as a component of the lancet assembly.

[0051] Figure 5B FIG. is a cross-sectional view schematically showing a lancet engaging member as a component of the lancet assembly.

[0052] Figure 6 FIG. is an external perspective view schematically showing a syringe according to an embodiment of the present invention.

[0053] Figure 7 FIG. is an exploded perspective view schematically showing a syringe according to an embodiment of the present invention.

[0054] Figure 8AIs a perspective view schematically showing an integrally combined ejector.

[0055] Figure 8B Is an exploded perspective view schematically showing the components of the ejector.

[0056] Figure 9A Is a cross-sectional view schematically showing the state before loading the lancet assembly into the syringe.

[0057] Figure 9B Is a top view schematically showing the lancet assembly before loading.

[0058] Figure 9C Is a cross-sectional view schematically showing the lancet assembly before loading.

[0059] Figure 10 Is a cross-sectional view schematically showing the state after starting to load the lancet assembly into the syringe.

[0060] Figure 11A Is a cross-sectional view (in the thickness direction) schematically showing the state when the loading of the lancet assembly into the syringe is completed.

[0061] Figure 11B Is a cross-sectional view (in the width direction) schematically showing the state when the loading of the lancet assembly into the syringe is completed.

[0062] Figure 11C Is a top view schematically showing the lancet assembly when the loading is completed.

[0063] Figure 11D Is a cross-sectional view schematically showing the lancet assembly when the loading is completed.

[0064] Figure 12 Is a cross-sectional view (in the thickness direction) schematically showing the state when the trigger lever of the syringe is pressed.

[0065] Figure 13 Is a cross-sectional view (in the thickness direction) schematically showing the ejection state of the puncture member.

[0066] Figure 14 Is a cross-sectional view (in the thickness direction) schematically showing the state when the puncture member retracts.

[0067] Figure 15A Is a cross-sectional view (in the thickness direction) schematically showing the state when the puncture is completed.

[0068] Figure 15B Is a top view schematically showing the lancet assembly when the puncture is completed.

[0069] Figure 16AIt is a cross-sectional view (in the thickness direction) schematically showing the state after the re-fastening starts.

[0070] Figure 16B It is a cross-sectional view (in the thickness direction) schematically showing the state at the end of the re-fastening.

[0071] Figure 17A It is a cross-sectional view (in the thickness direction) schematically showing the state at the start of the discharge of the lancet assembly.

[0072] Figure 17B It is a cross-sectional view (in the thickness direction) schematically showing the state where the protrusion of the push rod engages with the trigger rod after the start of the discharge of the lancet assembly.

[0073] Figure 17C It is a cross-sectional view (in the thickness direction) schematically showing the state where the engagement between the push rod and the rear end of the lancet body is released after the start of the discharge of the lancet assembly.

[0074] Figure 17D It is a cross-sectional view (in the thickness direction) schematically showing the state at the end of the discharge of the lancet assembly.

[0075] Figure 17E It is a top view schematically showing the lancet assembly at the end of the discharge.

[0076] Figure 17F It is a cross-sectional view (in the thickness direction) schematically showing the lancet assembly at the end of the discharge.

[0077] Figure 18A It is a cross-sectional view schematically showing the state at the start of the extraction of the lancet assembly to the outside after the filling into the syringe is completed.

[0078] Figure 18B It is a cross-sectional view schematically showing the state during the extraction of the lancet assembly to the outside after the filling into the syringe is completed.

[0079] Figure 18C It is a cross-sectional view schematically showing the state at the end of the extraction of the lancet assembly to the outside after the filling into the syringe is completed.

[0080] Figure 19A It is a cross-sectional view schematically showing the state at the start of the extraction of the lancet assembly to the outside during the filling into the syringe (at the moment when the protruding rear end of the lancet body engages with the front end of the push rod).

[0081] Figure 19B It is a cross-sectional view schematically showing the state during the extraction of the lancet assembly to the outside during the filling into the syringe (at the moment when the protruding rear end of the lancet body engages with the front end of the push rod).

[0082] Figure 19C is a cross-sectional view schematically showing the state at the end of pulling out the lancet assembly to the outside during the loading into the syringe (the moment when the protruding rear end portion of the lancet body engages with the front end portion of the plunger).

[0083] Figure 20A is a cross-sectional view schematically showing the state at the start of reloading the lancet assembly that has temporarily finished discharging into the syringe.

[0084] Figure 20B is a cross-sectional view schematically showing the state during the reloading of the lancet assembly that has temporarily finished discharging into the syringe.

[0085] Figure 20C is a cross-sectional view schematically showing the state at the end of reloading the lancet assembly that has temporarily finished discharging into the syringe.

[0086] Figure 21A is schematically showing during the loading into Figure 19C the syringe shown, a cross-sectional view of the state at the start of reloading the lancet assembly after pulling it out to the outside during the loading.

[0087] Figure 21B is schematically showing during the loading into Figure 19C the syringe shown, a cross-sectional view of the state during the reloading of the lancet assembly after pulling it out to the outside during the loading.

[0088] Figure 21C is schematically showing during the loading into Figure 19C the syringe shown, a cross-sectional view of the state at the end of reloading the lancet assembly after pulling it out to the outside during the loading. DETAILED DESCRIPTION

[0089] Hereinafter, with reference to the drawings, a syringe, a lancet assembly, and a puncture device configured to include the syringe and the lancet assembly according to an embodiment of the present invention will be described.

[0090] In this specification, the "puncture direction" in which the lancet body moves during puncture (i.e., the direction in which the puncturing member moves toward the puncture site during puncture) is defined as the "front" direction, and the opposite direction is defined as the "rear" direction. In addition, the "puncture direction" corresponds to the direction from the opening end of the lancet housing toward the puncture opening portion and corresponds to "front".

[0091] The inventors of the present application have intensively studied a syringe, a lancet assembly, and a puncture device configured to include the above syringe and lancet assembly that can function safely, and as a result, have proposed an embodiment of the present invention.

[0092] Figure 1 is a perspective view schematically showing a puncture device according to an embodiment of the present invention.

[0093] As Figure 1 shown, the puncture device 300 according to an embodiment of the present invention is configured to include a lancet assembly 100 and a syringe 200 into which the lancet assembly 100 can be loaded. Although it will be described later, in use, after the lancet assembly 100 is loaded into the syringe 200, the compressed spring as a component in the syringe 200 is used to extend, so that the lancet as a component of the lancet assembly 100 is launched toward a specified part of the patient's body. Thus, ultimately, a small amount of blood can be collected from the patient.

[0094] <Structure of Lancet Assembly 100>

[0095] Hereinafter, the lancet assembly 100 as a component of the puncture device 300 will be described.

[0096] Figure 2 is a perspective view schematically showing a lancet assembly according to an embodiment of the present invention. Figure 3A is a perspective view schematically showing a lancet housing as a component of the lancet assembly. Figure 3B is a cross-sectional view schematically showing a lancet housing as a component of the lancet assembly. Figure 4A is a perspective view schematically showing a lancet as a component of the lancet assembly. Figure 4B is a perspective view schematically showing the back side of a lancet as a component of the lancet assembly. Figure 5A is a perspective view schematically showing a lancet engaging member as a component of the lancet assembly. Figure 5B is a cross-sectional view schematically showing a lancet engaging member as a component of the lancet assembly.

[0097] As Figures 2 to 5B shown, the lancet assembly 100 according to an embodiment of the present invention has a structure in which a lancet 130 is integrally housed in a lancet housing 110 and a lancet engaging member 120 that can move relatively forward with respect to the lancet 130.

[0098] (Lancet Housing)

[0099] As Figure 3A shown, the lancet housing 110 is, for example, in a cylindrical shape as a whole. The shape of the lancet housing 110 is not necessarily limited to a cylindrical shape, and for example, it may also be in a prismatic shape. As Figure 3AAs shown, a recess 111 is provided on the outer surface of the lancet housing 110 (particularly in the area on the rear end side of the outer surface of the housing). Preferably, the recess 111 is provided in a ring shape along the circumferential direction of the main body portion of the lancet housing. When the lancet housing 110 is inserted into the syringe 200, the recess 111 engages with a protrusion of a lancet assembly receiving member provided in the syringe 200. Thus, the temporarily inserted lancet housing 110 can be held and fixed to the syringe 200.

[0100] In addition, the lancet housing 110 has an open rear end 115 on the rear end side and an open front end (a puncture opening 116 / an exposed opening 118 of the front end portion 120b of the lancet engaging member) on the front end side along the long side direction. The puncture opening 116 corresponds to the portion placed at a prescribed site to be punctured (e.g., fingertip).

[0101] As Figure 3B shown, the lancet housing 110 has an internal space 114, and a lancet 130 and a lancet engaging member 120 are accommodated in the internal space 114 so as to be movable in the puncture direction or in the direction opposite to the puncture direction. In addition, the lancet housing 110 is configured to have an extension portion 112 having a protruding portion 112a extending in the puncture direction and an inclined portion 113 in the internal space 114.

[0102] The protruding portion 112a of the extension portion 112 is placed at a position where it can be engaged with a dam provided on the back surface of the lancet body which is a component of the lancet 130 described later. The end portion 112b of the extension portion 112 is configured to be able to abut against a bent portion 123 provided on the back surface side of the lancet engaging member 120 described later. In order to be able to abut against the bent portion 123, the end portion 112b of the extension portion 112 has an inclined structure. In addition, by abutting the extension portion 112 against the bent portion 123 of the lancet engaging member 120, the extension portion 112 can be bent downward with a prescribed portion 112c of the extension portion 112 as a base point.

[0103] The inclined portion 113 is placed at the front end side position of the internal space 114 of the lancet housing 110 and is configured to be able to move a lancet cap which is a component of the lancet 130 described later upward.

[0104] On the inner surface (specifically, the inner side surface) of the lancet housing 110, a protrusion 117 is provided. The protrusion 117 is positioned behind the protrusion 125 of the lancet engaging member 120 and in front of the flexible locking portion 126 when viewed from above before loading. In addition, the protrusion 117 of the lancet housing 110 is configured to be able to lock the protrusion 125 of the lancet engaging member 120 located in the front when viewed from above. With this structure, before loading, by the locking of the protrusion 117 of the lancet housing 110 and the protrusion 125 of the lancet engaging member 120, the backward movement of the lancet engaging member 120 can be suppressed within the lancet housing 110. In addition, the protrusion 117 of the lancet housing 110 is configured such that the flexible locking portion 126 of the lancet engaging member 120 located behind when viewed from above can cross over the protrusion 117, but once it has crossed over, it cannot move backward and cross over the protrusion 117 again.

[0105] In addition, a clearance portion is provided at the rear of the inner surface (specifically, the inner side surface) of the lancet housing 110. This clearance portion can be locked with the flexible locking portion 127 (with a protrusion 128) disposed behind the side portion 121 of the lancet engaging member 120. Through this locking, the forward movement of the lancet engaging member 120 in the puncturing direction (i.e., forward) can be suppressed within the lancet housing 110 before loading.

[0106] (Lancet)

[0107] As Figure 4A and Figure 4B shown, the lancet 130 is configured to have a lancet body 131, a lancet cap 132, and a puncturing member 133. The puncturing member 133 straddles the lancet body 131 and the lancet cap 132 and is present therein. The front end portion 133a of the puncturing member 133 is covered by the lancet cap 132, and the lancet cap 132 and the lancet body 131 are connected via a connecting member 134.

[0108] The connecting member 134 is configured to be able to break easily when an external force is applied. Although it will be described later, when the lancet assembly 100 is loaded into the syringe 200, the lancet engaging member 120 moves relatively forward in the puncturing direction with respect to the lancet 130. Through the forward movement of the lancet engaging member 120 in the forward direction, the lancet cap 132 is pressed by the lancet engaging member. As a result, the connecting member 134 that connects the lancet cap and the connecting member 134 can be broken. Consequently, the lancet cap 132 is separated from the lancet body 131.

[0109] In addition, as Figure 4A and Figure 4BAs shown, the lancet body 131 is configured to have a protruding rear end portion 131a, a convex portion 131b (protruding portion) formed on the main surface, a flexible wing portion 131d formed on the side portion 131c, and a dam portion 131e formed on the back side.

[0110] The protruding rear end portion 131a can be engaged with the front end portion 203a of a pusher 203 described later. The convex portion 131b formed on the upper surface side of the lancet body 131 can be abutted against a concave portion 120c (in a plan view) of a lancet engaging member 120 described later. The flexible wing portion 131d can be locked with a protruding portion 129 formed inside the side portion 121 of the lancet engaging member 120 described later. The front portion of the dam portion 131e formed on the back side of the lancet body 131 can be locked with a protruding portion 112a provided on the lancet housing 110. By this locking, the forward movement of the lancet body 131 in the puncturing direction (i.e., forward) can be suppressed.

[0111] The lancet cap 132 is configured to have a cap main portion 132a and a protruding portion 132b continuous with at least one of the cap main portion 132a. The protruding portion 132b of the lancet cap 132 can be received in a concave portion provided on the side portion of the lancet engaging member 120 described later.

[0112] (Lancet engaging member)

[0113] As Figure 5A shown, the lancet engaging member 120 is configured to have two side portions 121 separated and opposed to each other along the puncturing direction. Between the separated and opposed side portions 121, the lancet body 131 of the lancet 130 can move in the puncturing direction or in the direction opposite to the puncturing direction.

[0114] As Figure 5A shown, the side portion 121 of the lancet engaging member 120 is configured to have a concave portion 124 capable of receiving the protruding portion 132b of the lancet cap 132. Although it will be described later, when the lancet assembly 100 is loaded into the syringe 200, the lancet engaging member 120 can move relative to the lancet 130 in the forward puncturing direction. When the lancet engaging member 120 moves in the forward direction, a forward moving force also acts on the protruding portion 132b of the lancet cap 132 received in the concave portion 124 of the lancet engaging member 120. Thereby, the lancet cap 132 can be separated from the lancet body 131.

[0115] In addition, the protruding portion 132b of the lancet cap 132 is received in the concave portion 124 of the lancet engaging member 120. Therefore, when the lancet engaging member 120 moves in the forward direction, the separated lancet cap 132 can also move in the forward direction together. As described above, the inclined portion 113 provided on the lancet housing 110 is positioned at the front end side of the internal space 114 of the lancet housing 110. Therefore, the separated lancet cap 132 moving in the forward direction can move upward along the inclined surface of the inclined portion 113. By this movement, the lancet body 131 with the puncturing member 133 whose front end is subsequently exposed does not contact the lancet cap 132, and the puncturing member 133 can protrude outward through the puncturing opening 116 provided at the front end side of the lancet housing 110.

[0116] In particular, in one embodiment of the present invention, the concave portion 124 provided on the side portion 121 of the lancet engaging member 120 can receive the protruding portion 132b of the lancet cap 132 at any stage before and after the lancet cap 132 is separated from the lancet body 131. That is, at any stage before and after separation, the protruding portion 132b of the lancet cap 132 is received in the concave portion 124 provided on the side portion 121 of the lancet engaging member 120. Specifically, from before the lancet cap 132 is separated from the lancet body 131 until the movement of the lancet cap 132 separated from the lancet body 131 and moved to a position deviating from the puncturing track of the puncturing member 133 ends, the protruding portion 132b of the lancet cap 132 is always received in the concave portion 124.

[0117] As described above, the separated lancet cap 132 moving in the forward direction can move upward along the inclined surface of the inclined portion 113 provided on the front side of the internal space 114 of the lancet housing 110. Thereby, contact between the lancet body 131 with the puncturing member 133 whose front end is already exposed and the lancet cap 132 can be suppressed. On this basis, in one embodiment of the present invention, not only before separation but also after separation, the protruding portion 132b of the lancet cap 132 is received in the concave portion 124. Therefore, it is possible to suppress the overall inclination of the lancet cap 132 in plan view and / or side view after separation. As a result, the lancet body 131 with the puncturing member 133 whose front end is already exposed does not contact the lancet cap 132 and moves in the lancet housing 110 along the puncturing direction. Thus, the front end of the puncturing member 133 can be appropriately exposed through the puncturing opening 116.

[0118] On the outer side of the side portion 121 of the lancet engaging member 120, there are provided a protrusion 125, a flexible locking portion 126, and a flexible locking portion 127 (with a protrusion 128). The protrusion 125 of the lancet engaging member 120 is disposed in front of the protrusion 117 provided on the inner side surface of the lancet housing 110. By this configuration, before loading, the backward movement of the lancet engaging member 120 can be suppressed within the lancet housing 110. The flexible locking portion 127 (with a protrusion 128) is disposed behind the side portion 121 of the lancet engaging member 120 and can be locked with a clearance portion provided on the inner side surface of the lancet housing 110. By this locking, the forward movement of the lancet main body 131 in the puncturing direction (i.e., forward) can be suppressed.

[0119] As Figure 5A shown, the flexible locking portion 126 is provided between the protrusion 125 and the flexible locking portion 127. The lancet engaging member 120 moves forward in the puncturing direction before the end of loading, and during its forward movement, the flexible locking portion 126 can cross over the protrusion 117 provided on the inner side surface of the lancet housing 110 when viewed from above. On the other hand, once the flexible locking portion 126 crosses over the protrusion 117, it does not move backward. Thus, at the end of loading, the backward movement of the lancet engaging member 120 can be suppressed within the lancet housing 110.

[0120] On the inner rear side of the side portion 121 of the lancet engaging member 120, there is provided a protrusion 129. This protrusion 129 has the following structure: when the lancet main body 131 moves backward relative to the lancet engaging member 120, the flexible wing portion 131d of the lancet main body 131 can cross over this protrusion 129, but once it crosses over, it is locked with the protrusion 129 and cannot cross over the protrusion 129 again in the forward direction. By the locking of the flexible wing portion 131d with the protrusion 129 of the lancet engaging member 120, the movement of the lancet main body 131 in the puncturing direction (i.e., the forward direction) can be appropriately suppressed.

[0121] In addition, as Figure 5B shown, the lancet engaging member 120 is configured to have a bent portion 123 with a bent structure on the back side. As will be described later, when the lancet assembly 100 is loaded into the syringe 200, the lancet engaging member 120 moves forward in the puncturing direction relative to the lancet 130. By the forward movement of the lancet engaging member 120 in the forward direction, the bent portion 123 of the lancet engaging member 120 can abut against the end portion 112b of the extending portion 112 having an inclined structure (a component of the lancet housing 110).

[0122] In addition, as described above, the side portion 121 of the lancet engaging member 120 can move in the puncturing direction (advancing direction) or the direction opposite to the puncturing direction (retreating direction) within the lancet housing 110. It is preferable that at least the lancet engaging member 120 and the lancet housing 110 are made of a slidable resin so that the forward and backward movement of the lancet engaging member 120 within the lancet housing 110 becomes smooth, that is, it can slide. On this basis, it is preferable that the lancet body 131 and the lancet cap 132, which are the constituent elements of the lancet 130, are also made of the above-mentioned slidable resin. Although not particularly limited, this slidable resin can be at least one thermoplastic resin selected from the group consisting of polypropylene, polyacetal, polyethylene, polystyrene, and ABS resin.

[0123] <Structure of Syringe 200>

[0124] Hereinafter, the syringe 200, which is a constituent element of the puncturing device 300, will be described.

[0125] Figure 6 is a schematic perspective view showing the appearance of a syringe according to an embodiment of the present invention. Figure 7 is a schematic exploded perspective view showing a syringe according to an embodiment of the present invention.

[0126] As Figure 6 and Figure 7 shown, the syringe 200 according to an embodiment of the present invention has a structure in which the constituent elements of the syringe 200 are housed within the housing 201. The constituent elements of the syringe 200 housed within the housing 201 are configured to have a push rod 203, a lancet assembly housing member 204, a trigger rod 205, a pusher 217, a firing spring (ejection spring) / return spring 209 provided on the push rod 203, a locking member 216, a regulator (puncturing depth adjusting member) 209, and an adjustment ring 210, etc.

[0127] The push rod 203 is arranged along the longitudinal axis of the syringe 200 and has a function of ejecting the lancet body 131 in the puncturing direction. The front end portion 203a of the push rod 203 can engage with the rear end portion 131a of the lancet body 131 (refer to Figure 4A ). When loading the lancet assembly 100 into the syringe 200, the lancet body 131 is inserted into the syringe 200, and the front end portion 203a of the push rod 203 engages with the rear end portion 131a of the lancet body 131. After that, if the lancet body 131 is further inserted rearward, the push rod 203 is pressed rearward. As a result, the firing spring 208 provided on the push rod 203 is compressed. The compression of the firing spring 208 means that the force required for the ejection of the puncturing member 133 is accumulated in the push rod 203.

[0128] The lancet assembly receiving member 204 has the function of receiving the lancet assembly during use and also helps to remove the cap during loading. The lancet assembly receiving member 204 as a whole has a cylindrical shape or an annular shape and has a front protruding portion inside thereof.

[0129] The receiving member 204 itself is provided at the front end opening of the syringe and receives the lancet assembly inserted during use. That is, it is configured such that the lancet assembly can be loaded into the syringe in a manner that a part of the lancet housing is received in the receiving member 204. During the loading operation of the syringe 200, when the lancet assembly is inserted into the receiving member 204, due to the presence of the front protruding portion, a force for moving forward (particularly a force for relatively moving forward with respect to the lancet housing) acts on the lancet engaging member 120.

[0130] Specifically, when the lancet assembly is inserted into the receiving member 204, the rear end portion 120a of the lancet engaging member abuts against the front protruding portion of the lancet assembly receiving member 204. If the lancet housing 110 is further inserted, it becomes a state of being pressed by the front protruding portion, and the lancet engaging member 120 moves forward in the lancet housing.

[0131] That is, due to the abutment of the rear end portion 120a of the lancet engaging member inserted into the syringe against the front protruding portion of the receiving member 204, a force of "relatively moving forward with respect to the lancet housing" acts on the lancet engaging member. As a result, the lancet cap is pressed by the lancet engaging member, and as a result, the lancet cap is separated from the lancet body and moves to a position deviating from the puncture track.

[0132] In addition, the syringe 200 is configured to have a housing locking function. This function is a function of holding the lancet assembly so as not to fall off the syringe even when a force is applied to the lancet assembly in a direction opposite to the insertion direction after the lancet assembly is inserted into the syringe. This housing locking is mainly achieved by the engagement of a protrusion provided on the inner surface of the lancet assembly receiving member 204 with a recess provided on the outer surface of the lancet housing.

[0133] Figure 8A It is a perspective view schematically showing the integrally combined ejector. Figure 8B It is an exploded perspective view schematically showing the components of the ejector.

[0134] As Figure 8A and Figure 8BAs shown, the ejector 217 has an ejector function of removing the lancet assembly 100 from the syringe 200 after puncture. That is, the ejector 217 is used to eject the loaded lancet assembly 100. The overall shape of the ejector 217 preferably becomes long and strip-shaped. The ejector 217 is configured to have an ejector main portion 206 extending in the puncture direction and an ejector knob 207 disposed at the rear end side of the ejector main portion 206 extending in the puncture direction.

[0135] The ejector main portion 206 and the ejector knob 207 are integrally combined and formed. The ejector main portion 206 is configured to have an ejecting portion 206a that directly ejects the lancet assembly 100 and an ejector extension portion 206b. The ejector extension portion is disposed between the ejecting portion 206a and the ejector knob 207 and is used to pull the push rod 203 and re-latch it. The ejecting portion 206a and the ejector extension portion 206b are integrally combined and formed. In addition, the ejector extension portion 206b has a region on the upper surface side for accommodating the push rod 203 extending in the puncture direction.

[0136] If a force is applied to the ejector knob 207 provided on the rear end side of the ejector 217 from the outside and it is pressed forward, the entire ejector 217 moves forward. As a result, the front end portion 217a of the ejector abuts against the rear end portion 120a of the lancet engaging member 120, so that the front end portion 217a of the ejector can press the lancet engaging member 120. Therefore, if the ejector 217 is further moved forward after the abutment, the lancet engaging member 120 can be moved forward within the lancet housing 110.

[0137] The lancet engaging member 120 that has moved forward within the lancet housing 110 finally reaches the position closest to the front side within the lancet housing. That is, as a result, the front end portion 120b of the lancet engaging member 120 finally abuts against the inner wall portion of the lancet housing 110. Thus, if one attempts to continue pressing the ejector 217 and move the lancet engaging member 120 forward, the lancet housing 110 is also pressed forward in a state of being pressed by the lancet engaging member 120. As a result, the entire lancet assembly 100 is pressed forward. Therefore, if the ejector 217 is continuously moved, the lancet assembly 100 is finally ejected from the syringe 200.

[0138] Here, in one embodiment of the present invention, the above-described ejector main portion 206 and the ejector knob 207 are integrally combined and formed, but the ejector knob 207 can be independently rotated about an axis with respect to the ejector main portion 206. By adopting this structure, compared with the case where the ejector main portion 206 and the ejector knob 207 form a single separate component as a whole, it has advantages in the following aspects.

[0139] Specifically, when the ejector knob 207 is pressed forward, the ejector knob 207 can perform axial rotation (i.e., twisting). In this case, if the ejector main body 206 and the ejector knob 207 as a whole form a separate component, there is a concern that the ejector main body 206 integrated with the ejector knob 207 may also perform axial rotation simultaneously. As described above, the ejector extension portion 206b has a region on the upper surface side for accommodating the push rod 203 extending in the puncture direction. Therefore, if the ejector main body 206 performs axial rotation, the ejector extension portion 206b, which is a constituent element thereof, can also perform axial rotation accordingly. Therefore, there is a concern that the push rod 203 located on the axially rotated ejector extension portion 206b and the lancing assembly 100 engaged with the push rod 203 may also perform axial rotation. The axial rotation of the lancing assembly 100 may make proper puncture through the puncture member difficult.

[0140] In contrast, in one embodiment of the present invention, the ejector knob 207 can perform axial rotation independently of the ejector main body 206. Therefore, even when the ejector knob 207 performs axial rotation (i.e., twisting) when the ejector knob 207 is pressed forward, it is possible to prevent the ejector main body 206 integrally combined with the ejector knob 207 from performing axial rotation simultaneously. Therefore, it is possible to prevent the ejector extension portion 206b, which is a constituent element of the ejector main body 206, from performing axial rotation simultaneously. Therefore, it is possible to prevent the push rod 203 located on the ejector extension portion 206b and the lancing assembly 100 engaged with the push rod 203 from performing axial rotation. As a result, by preventing the axial rotation of the lancing assembly 100, proper puncture through the puncture member can be performed.

[0141] In addition, in one embodiment of the present invention, the housing 201 of the syringe 200 has the following features. Specifically, the housing 201 is composed of at least two sub-parts 202 that can be disassembled from each other and extend in the puncture direction, and one end 202a of each sub-part in a direction different from the puncture direction and the other end 202b are respectively bound by binding members 214a, 214b. Although not particularly limited, the binding members 214a, 214b can be annular members that form a continuous opening shape from one side to the other side.

[0142] The housing is made of, for example, a thermoplastic resin material. However, according to the technical common sense of those skilled in the art so far, the sub-parts of the housing made of a thermoplastic resin material are usually connected and fixed by ultrasonic welding. However, in ultrasonic welding, there may be concerns such as: adjustment of welding takes time, and resin material melts out during welding, which may cause the components of the syringe 200 accommodated in the housing to function improperly.

[0143] Therefore, instead of dealing with the connection and fixation of sub-parts to each other by ultrasonic welding as has been done so far, in one embodiment of the present invention, as described above, a method is adopted in which one end 202a of each sub-part 202 and the other end 202b are bound to each other by binding members 214a and 214b, respectively.

[0144] By adopting this method, one end 202a of each sub-part can be bound to each other by the binding member 214a. That is, one end 202a of each sub-part can be inserted into the binding member 214a. Similarly, the other end 202b of each sub-part can be bound to each other by the binding member 214b. That is, the other end 202b of each sub-part can be inserted into the binding member 214b.

[0145] Based on the above, one end 202a of each sub-part 202 and the other end 202b can be inserted into the binding members 214a and 214b, respectively, whereby the outer edge portions 202c and 202d of each sub-part 202 can be brought into contact with each other or continuously contacted along the puncture direction. Thereby, a separate housing 201 composed of each sub-part 202 can be provided.

[0146] In addition, in one embodiment of the present invention, it is preferable that the outer edge portion 202c of an adjacent sub-part 202 and the outer edge portion 202d of another sub-part 202 in the puncture direction can be connected to each other. Specifically, the locking member 216 provided on the outer edge portion 202c of one sub-part 202 is locked to a locked member (not shown) provided on the outer edge portion 202d of another sub-part 202. Thereby, the outer edge portion 202c of one sub-part 202 and the outer edge portion 202d of another sub-part 202 that are in continuous contact can be appropriately connected and fixed by the binding members 214a and 214b.

[0147] On this basis or instead of this, a pin 215, for example a spring pin, can be used. Specifically, each sub-part has a hole 218 having a diameter size substantially the same as that of the pin 215 at or near the outer edge portion. One end 215a of the pin 215 is inserted into the hole 218 formed in one sub-part, and the other end 215b of the pin 215 is inserted into the hole 218 formed in another sub-part. Thereby, the outer edge portion 202c of one sub-part 202 and the outer edge portion 202d of another sub-part 202 that are in continuous contact can also be appropriately connected and fixed by the binding members 214a and 214b.

[0148] <Usage mode>

[0149] Hereinafter, the usage mode of the lancet assembly 100 and the syringe 200 according to one embodiment of the present invention will be described.

[0150] Before loading the lancet assembly

[0151] Figure 9A is a cross-sectional view schematically showing the state before the lancet assembly 100 is loaded into the syringe 200. Figure 9B is a top view schematically showing the lancet assembly 100 before loading. Figure 9C is a cross-sectional view schematically showing the lancet assembly 100 before loading.

[0152] As Figures 2 to 5B and Figures 9A to 9C shown, before loading, the front portion of the dam portion 131e provided on the back side of the lancet body 131 can be engaged with the protruding portion 112a provided on the lancet housing 110. By this engagement, the forward movement of the lancet body 131 in the puncture direction (i.e., forward) can be suppressed. In addition, before loading, the protruding portion 128 of the flexible locking portion 127 disposed behind the side portion 121 of the lancet engaging member 120 can be engaged with the clearance portion provided on the inner side surface of the lancet housing 110. By this engagement, before loading, the forward movement of the lancet engaging member 120 in the puncture direction (i.e., forward) can be suppressed within the lancet housing 110. In addition, before loading, in a top view, the protruding portion 125 provided outside the side portion 121 of the lancet engaging member 120 is disposed in front of the protruding portion 117 provided on the inner side surface of the lancet housing 110. By this arrangement, before loading, the backward movement of the lancet engaging member 120 can be suppressed within the lancet housing 110.

[0153] After starting the loading of the lancet assembly

[0154] Figure 10 is a cross-sectional view schematically showing the state after starting to load the lancet assembly 100 into the syringe 200.

[0155] As Figure 10 shown, when starting to load the lancet assembly 100 into the syringe 200, the rear end portion 131a of the lancet body 131 is engaged with the front end portion 203a of the push rod 203. At this time, through the lancet assembly receiving member 204, the flexible locking portion 127 (refer to Figure 9B ) disposed behind the side portion 121 of the lancet engaging member 120 is deflected inward. Thereby, the engagement between the protruding portion 128 and the clearance portion provided on the inner side surface of the lancet housing 110 can be released. In addition, when being engaged, through the lancet assembly receiving member 204, a force for moving in the forward direction, i.e., the puncture direction, acts on the lancet engaging member 120.

[0156] As Figure 5AAs shown, the side portion 121 of the lancet engaging member 120 is configured to have a concave portion 124 that can accommodate the protruding portion 132b of the lancet cap 132. When a force is applied to move the lancet engaging member 120 in the forward direction, the protruding portion 132b of the lancet cap 132 accommodated in the concave portion 124 of the lancet engaging member 120 is also subjected to a force moving in the forward direction. Thus, the lancet cap 132 can be separated from the lancet body 131.

[0157] When the loading of the lancet assembly is completed

[0158] Figure 11A It is a cross-sectional view (in the thickness direction) schematically showing the state at the end of loading the lancet assembly 100 into the syringe 200. Figure 11B It is a cross-sectional view (in the width direction) schematically showing the state at the end of loading the lancet assembly 100 into the syringe 200. Figure 11C It is a top view schematically showing the lancet assembly 100 at the end of loading. Figure 11D It is a cross-sectional view schematically showing the lancet assembly 100 at the end of loading.

[0159] At the end of loading, as Figure 3A and Figure 11A shown, the protrusion 203b provided on the outer side surface of the push rod 203 extending along the puncture direction is placed in a position behind the trigger lever 205, and a state where the trigger lever 205 and the protrusion 203b are mutually locked is formed. Thus, the movement of the push rod 203 in the puncture direction is suppressed, thereby providing a standby state before injection. In addition, at the end of loading, as Figure 11B shown, the protrusion 204a of the lancet assembly receiving member 204 is locked with the recess 111 provided on the outer surface of the lancet housing 110. Thus, the temporarily inserted lancet housing 110 can be held and fixed to the syringe 200.

[0160] As Figure 5A and Figure 11C shown, the lancet engaging member 120 further includes a flexible locking portion 126 between the protrusion 125 provided outside the side portion 121 of the lancet engaging member 120 and the flexible locking portion 127 disposed behind the side portion 121. The lancet engaging member 120 moves forward in the puncture direction before the end of loading, and during the movement, the protrusion 117 provided on the inner side surface of the lancet housing 110 in a top view is configured to allow the flexible locking portion 126 to pass over. On the other hand, the protrusion 117 is configured such that once the flexible locking portion 126 has passed over, it does not move backward. With this structure, at the end of loading, the backward movement of the lancet engaging member 120 can be suppressed within the lancet housing 110.

[0161] In addition, as Figure 5B and Figure 11D shown, the lancet engaging member 120 is configured to have a bent portion 123 with a bent structure on the back side. When the lancet assembly 100 is loaded into the syringe 200, the lancet engaging member 120 moves forward relative to the lancet 130 in the puncturing direction. By the forward movement of the lancet engaging member 120, the bent portion 123 of the lancet engaging member 120 can abut against the end portion 112b of the extending portion 112 having an inclined structure.

[0162] After the start of this abutment, if the lancet engaging member 120 further moves forward, the abutting area between the bent portion 123 of the lancet engaging member 120 and the end portion 112b of the extending portion 112 in the lancet housing 110 increases. Thereby, the pressing force of the bent portion 123 of the lancet engaging member 120 against the end portion 112b of the extending portion 112 having an inclined structure comes into play. By the action of this pressing force, a predetermined portion of the extending portion 112 including the protruding portion 112a can be bent downward with the predetermined portion 112c of the extending portion 112 as a base point. Thereby, the locking between the protruding portion 112a of the lancet housing 110 and the dam portion 131e of the lancet body 131 can be released. As a result, the lancet body 131 can move forward in the puncturing direction (i.e., forward).

[0163] The protruding portion 132b of the lancet cap 132 is received in the concave portion 124 of the lancet engaging member 120. Therefore, when the lancet engaging member 120 moves forward, the separated lancet cap 132 can also move forward together. The inclined portion 113 provided on the lancet housing 110 is positioned at the front end side of the internal space 114 of the lancet housing 110. Therefore, the separated lancet cap 132 moving forward can move upward along the inclined surface of the inclined portion 113. By this movement, the lancet body 131 with the puncturing member 133 having the front end exposed does not contact the lancet cap 132, and the puncturing member 133 can protrude outward through the puncturing opening 116 provided at the front end side of the lancet housing 110.

[0164] In particular, in one embodiment of the present invention, the concave portion 124 provided on the side portion 121 of the lancet engaging member 120 can receive the protruding portion 132b of the lancet cap 132 at any stage before and after the lancet cap 132 is separated from the lancet body 131. That is, at any stage before and after separation, the protruding portion 132b of the lancet cap 132 is received in the concave portion 124 provided on the side portion 121 of the lancet engaging member 120.

[0165] As described above, the separated lancet cap 132 moving in the forward direction can move upward along the inclined surface of the inclined portion 113 provided on the front side of the internal space 114 of the lancet housing 110. Thereby, contact between the lancet body 131 with the puncturing member 133 having its front end exposed and the lancet cap 132 can be suppressed. On this basis, in one embodiment of the present invention, not only before separation but also after separation, the protruding portion 132b of the lancet cap 132 is housed in the concave portion 124, so that the overall inclination of the lancet cap 132 in plan view and / or side view can be suppressed after separation. Thereby, in the subsequent ejection process of the puncturing member 133, the lancet body 131 of the puncturing member 133 with its front end exposed does not contact the lancet cap 132 and can move within the lancet housing 110 along the puncturing direction. As a result, the front end of the puncturing member 133 can be appropriately ejected to the outside through the puncturing opening 116.

[0166] Pushing in the trigger lever

[0167] Figure 12 It is a cross-sectional view (in the thickness direction) schematically showing the state when the trigger lever 205 of the syringe 200 is pressed.

[0168] After the loading is completed, as Figure 12 shown, the trigger lever 205 is pressed. By this pressing, one end of the trigger lever 205 moves upward, thereby releasing the locking of the protrusion 203b provided on the outer side surface of the push rod 203 extending along the puncturing direction with the trigger lever 205.

[0169] Firing the piercing member

[0170] Figure 13 It is a cross-sectional view (in the thickness direction) schematically showing the ejection state of the puncturing member.

[0171] As described above, when the lancet assembly 100 is loaded, the push rod 203 is pressed backward, so that the striker spring 208 provided on the push rod 203 is in a compressed state. In this compressed state, if the locking of the protrusion 203b with the trigger lever 205 is released, the compressed striker spring 208 extends, whereby the lancet body 131 can move in the forward direction. Thereby, the front end of the puncturing member 133 provided on the lancet body 131 can be appropriately ejected to the outside through the puncturing opening 116.

[0172] Retracting the piercing member

[0173] Figure 14 It is a cross-sectional view (in the thickness direction) schematically showing the state when the puncturing member retracts.

[0174] When the puncturing member 133 is ejected, the striker spring (ejection spring) 208 provided on the push rod 203 extends. On the other hand, the return spring 209 can be compressed. A force to extend acts on the compressed return spring 209, and thus a force toward the rear acts on the push rod 203. As a result, the lancet body 131 engaged with the push rod 203, that is, the puncturing member 133 can rapidly retract after puncturing.

[0175] When piercing is completed

[0176] Figure 15A is a cross-sectional view (in the thickness direction) schematically showing the state at the end of puncturing. Figure 15B is a top view schematically showing the lancet assembly 100 at the end of puncturing.

[0177] As Figure 15A and Figure 15B shown, after the puncturing member 133 retracts, that is, after the lancet body 131 provided with the puncturing member 133 retracts, one end of the trigger lever 205 moves downward and abuts against the outer side surface of the push rod 203 extending along the puncturing direction. Based on the above, the puncturing using the puncturing member 133 is completed.

[0178] Re-clamping

[0179] Figure 16A is a cross-sectional view (in the thickness direction) schematically showing the state after the re-latching starts. Figure 16B is a cross-sectional view (in the thickness direction) schematically showing the state at the end of re-latching.

[0180] After the puncturing is completed, as Figure 16A shown, the pulling of the ejector knob 207 in the retracting direction starts. After that, as Figure 16B shown, if the pulling of the ejector knob 207 in the retracting direction is further continued, the push rod 203 retracts, and along with this, the lancet body 131 engaged with the retracting push rod 203 can be retracted.

[0181] Ejection of the lancet assembly

[0182] Figure 17A is a cross-sectional view (in the thickness direction) schematically showing the state at the start of the ejection of the lancet assembly. Figure 17B is a cross-sectional view (in the thickness direction) schematically showing the state where the protrusion of the push rod engages with the trigger lever after the start of the ejection of the lancet assembly. Figure 17C is a cross-sectional view (in the thickness direction) schematically showing the state where the engagement between the push rod and the rear end portion of the lancet body is released after the start of the ejection of the lancet assembly. Figure 17DIt is a cross-sectional view (in the thickness direction) schematically showing the state of the lancet assembly at the end of ejection. Figure 17E It is a top view schematically showing the lancet assembly at the end of ejection. Figure 17F It is a cross-sectional view (in the thickness direction) schematically showing the lancet assembly at the end of ejection.

[0183] After the puncture is completed, as Figure 17A shown, the ejector knob 207 is pressed into the puncture direction, and the ejection of the lancet assembly starts. Next, as Figure 17B shown, the ejector knob 207 is pressed into the puncture direction. Along with this, the lancet housing 110 and the lancet engaging member are pressed into the puncture direction. At this time, the protrusion 203c of the push rod 203 engages with the trigger lever 205, thereby being able to suppress the forward movement of the push rod 203 in the puncture direction. Next, as Figure 17C shown, the ejector knob 207 is further pressed into the puncture direction. Along with this, the lancet housing 110 and the lancet engaging member 120 are further pressed into the puncture direction. Finally, the engagement between the rear end portion 131a of the lancet and the push rod 203 is released. As a result, as Figure 17D shown, the lancet assembly 100 can be ejected from the syringe 200.

[0184] In addition, when the lancet assembly 100 is ejected, as Figure 17E and Figure 17F shown, the lancet body 131 relatively moves backward with respect to the concave portion 120c (when viewed from above) formed at the rear side of the lancet engaging member 120. In one embodiment of the present invention, by the end of this backward movement, the convex portion (or protruding portion) 131b formed on the upper surface side of the lancet body 131 can abut against the concave portion 120c (when viewed from above) of the lancet engaging member 120. Thereby, the concave portion of the lancet body 131 is received by the concave portion 120c (when viewed from above) of the lancet engaging member 120, thereby being able to avoid the further backward movement of the lancet body 131.

[0185] In addition, as described above, when the lancet assembly 100 is ejected, the lancet body 131 relatively moves backward with respect to the lancet engaging member 120. At this time, the flexible wing portion 131d of the lancet body 131 passes over the protrusion 129 provided at the inner rear side of the side portion 121 of the lancet engaging member 120. However, once the passed flexible wing portion 131d becomes a structure that is locked with the protrusion 129 and cannot pass over the protrusion 129 again in the forward direction. Thereby, the movement of the lancet body 131 in the puncture direction (i.e., the forward direction) can be appropriately suppressed.

[0186] Based on the above situation, it is also possible to appropriately avoid both the forward movement and the backward movement of the lancet body 131 to which the puncture member 133 with the exposed front end portion 133a is mounted and fixed when the lancet assembly 100 is discharged. In addition, as described above, at the end of the loading which is the stage before the discharge of the lancet assembly 100, the lancet engaging member 120 moves forward relatively. During the process of its forward movement, once the flexible locking portion 126 passes over the protrusion 117 provided on the inner side surface of the lancet housing in a top view, it will not pass over the rear protrusion 117 again and move backward. That is, the flexible locking portion 126 of the lancet engaging member 120 is locked with the protrusion 117 of the lancet housing 110. Thereby, it is possible to prevent the lancet engaging member 120 from detaching from the lancet housing 110.

[0187] As a result, according to an embodiment of the present invention, when the lancet assembly 100 is discharged, it is possible to appropriately prevent either the lancet engaging member 120 or the lancet body 131 to which the puncture member 133 with the exposed front end portion 133a is mounted and fixed from detaching from the lancet housing 110. As a result, after the discharge of the lancet assembly 100 is completed, it is possible to appropriately prevent the front end portion 133a of the puncture member 133 from puncturing a person's skin. Therefore, according to an embodiment of the present invention, it is possible to perform disposal and the like of the used lancet assembly 100 in a safer environment.

[0188] It can also be understood from the above situation that in an embodiment of the present invention, the following processes are generally carried out in sequence.

[0189] Process 1: A process of loading the lancet assembly 100 into the syringe 200

[0190] Process 2: A process of ejecting the puncture member which is a component of the lancet assembly 100 after the loading is completed

[0191] Process 3: A process of retracting the ejected puncture member and ending the puncture

[0192] Process 4: A process of re-latching by pulling the ejector knob in the backward direction

[0193] Process 5: A process of discharging the lancet assembly 100 from the syringe 200 to the outside

[0194] <Irregular form>

[0195] Here, when using the puncture device 300 according to an embodiment of the present invention, for example, the following irregular forms are considered to occur.

[0196] 1. Unloading configuration of the lancet assembly 100 at the end of the above-mentioned process 1

[0197] Figure 18AIt is a cross-sectional view schematically showing the state at the start of pulling out the lancet assembly after the filling into the syringe is completed, towards the outside. Figure 18B It is a cross-sectional view schematically showing the state during the pulling out of the lancet assembly towards the outside after the filling into the syringe is completed. Figure 18C It is a cross-sectional view schematically showing the state at the end of pulling out the lancet assembly towards the outside after the filling into the syringe is completed.

[0198] As described above, in the normal mode, usually after the filling of the lancet assembly 100 into the syringe 200 is completed according to the above-mentioned process 1, then the puncturing member 133 is ejected towards the outside according to the above-mentioned process 2. However, depending on the situation, as Figures 18A to 18C shown, it is considered that before the transition from process 1 to process 2, the lancet assembly 100 after the filling into the syringe is inadvertently pulled out towards the outside.

[0199] Regarding this aspect, at the end of filling, as Figures 18A to 18C shown, the protrusion 203b provided on the outer side of the push rod 203 extending along the puncturing direction is placed in a position behind the trigger lever 205, and a state where the trigger lever 205 and the protrusion 203b are engaged with each other is formed. Thereby, the movement of the push rod 203 in the puncturing direction can be suppressed.

[0200] In the state where the movement of the above-mentioned push rod 203 in the puncturing direction is suppressed, when the lancet assembly 100 is inadvertently pulled out towards the outside (puncturing direction / advancing direction), since the protruding rear end portion 131a of the lancet body 131, which is a component of the lancet assembly 100, engages with the front end portion 203a of the push rod 203, the lancet body 131 itself does not move forward. On the other hand, through the engagement of the flexible locking portion 126 of the lancet locking member 120 with the protrusion 117 of the lancet housing 110, the lancet housing 110 and the lancet locking member 120 are in an integrated state. Therefore, for example, if the lancet housing 110 is grasped by hand or the like and pulled towards the outside (puncturing direction / advancing direction), the lancet housing 110 and the lancet locking member 120 move integrally.

[0201] Based on the above situation, when the lancet assembly 100 is inadvertently pulled out towards the outside, compared with Figure 17E and Figure 17FIn the same manner as shown, the lancet body 131 moves backward relative to the lancet engaging member 120. When this backward movement ends, the convex portion 131b formed on the upper surface side of the lancet body 131 abuts against the concave portion 120c (in plan view) of the lancet engaging member 120. Thereby, the concave portion of the lancet body 131 can be received by the concave portion 120c (in plan view) of the lancet engaging member 120, and further backward movement of the lancet body 131 can be avoided.

[0202] In addition, when the lancet assembly 100 is inadvertently pulled out externally, Figure 17E and Figure 17F in the same manner as shown, the lancet body 131 moves backward relative to the lancet engaging member 120. At this time, the flexible wing portion 131d of the lancet body 131 passes over the protrusion 129 provided at the inner rear of the side portion 121 of the lancet engaging member 120, and once the flexible wing portion 131d that has passed over engages with the protrusion 129. Thereby, movement of the lancet body 131 in the puncture direction (i.e., the forward direction) can be appropriately suppressed.

[0203] Based on the above situation, even if the lancet assembly 100 is inadvertently pulled out externally, both forward movement and backward movement of the lancet body 131 with the puncture member 133 having its front end portion 133a exposed and fixed can be appropriately avoided. In addition, at the end of loading, the flexible locking portion 126 of the lancet engaging member 120 has already been locked to the protrusion 117 of the lancet housing 110, so that the lancet engaging member 120 can be prevented from being pulled out from the lancet housing 110.

[0204] As a result, even if the lancet assembly 100 is inadvertently pulled out externally, either the lancet engaging member 120 or the lancet body 131 with the puncture member 133 having its front end portion 133a exposed and fixed can be appropriately prevented from detaching from the lancet housing 110.

[0205] 2. Unloading configuration of the lancet assembly 100 at the intermediate stage of the above-mentioned process 1 (when the protruding rear end of the lancet body engages with the front end of the push rod) moment)

[0206] Figure 19A It is a cross-sectional view schematically showing the state at the start of pulling out the lancet assembly externally during the middle of loading into the syringe (the moment when the protruding rear end portion of the lancet body engages with the front end portion of the plunger). Figure 19B It is a cross-sectional view schematically showing the state during the middle of pulling out the lancet assembly externally during the middle of loading into the syringe (the moment when the protruding rear end portion of the lancet body engages with the front end portion of the plunger). Figure 19CIt is a cross-sectional view schematically showing the state at the end of pulling out the lancet assembly to the outside during the loading into the syringe (the moment when the protruding rear end portion of the lancet main body engages with the front end portion of the plunger).

[0207] As described above, in the normal mode, after the loading of the lancet assembly 100 into the syringe 200 is completed in accordance with the above-mentioned process 1, the puncturing member 133 is then ejected to the outside in accordance with the above-mentioned process 2. However, depending on the situation, as Figures 19A to 19C shown, it is considered that during the intermediate moment of process 1 (the moment when the protruding rear end portion of the lancet main body engages with the front end portion of the plunger), the lancet assembly 100 may be inadvertently pulled out from the syringe to the outside.

[0208] In this regard, at the intermediate moment of loading (the moment when the protruding rear end portion 131a of the lancet main body 131 engages with the front end portion 203a of the plunger 203), as Figure 19A shown, the front end of the trigger lever 205 is temporarily lifted away from the outer side surface of the plunger 203 by the protruding portion 206a1 of the ejection portion 206a located in the ejector main body 206.

[0209] In this regard, if the lancet assembly 100 is pulled out to the outside (the puncturing direction / advancing direction) at the intermediate moment of loading (the moment when the protruding rear end portion 131a of the lancet main body 131 engages with the front end portion 203a of the plunger 203), the rear end portion 131a of the lancet main body 131 engages with the front end portion 203a of the plunger 203, and thereby the plunger 203 also moves forward. As described above, the ejector extension portion 206b, which is a component of the ejector, has a region for accommodating the plunger 203 extending in the puncturing direction (refer to Figure 8A and Figure 8B ). Through the accommodation of the plunger 203 by the above-mentioned ejector, the ejector can also move forward along with the forward movement of the plunger 203.

[0210] Accordingly, as Figure 19B shown, the protruding portion 206a1 of the ejection portion 206a located in the ejector main body 206 is not located directly below the front end of the trigger lever 205. Therefore, the front end of the trigger lever 205 contacts the outer side surface of the plunger 203 and is placed in front of the protrusion 203c provided on the outer side surface of the plunger 203. Thus, the front end of the trigger lever 205 and the protrusion 203c can be mutually locked, and thereby, even if the lancet main body 131 moves forward, the forward movement of the plunger 203 engaged with the lancet main body 131 can be suppressed.

[0211] If the lancet assembly 100 is pulled outwards (in the puncturing direction / advancing direction) at the above-mentioned mid-way loading time, the protruding rear end portion 131a of the lancet body 131 engages with the front end portion 203a of the push rod 203 whose movement in the puncturing direction is suppressed as described above. Therefore, the lancet body 131 itself does not move forward.

[0212] The above-mentioned mid-way loading time becomes the engagement time of the protruding rear end portion 131a of the lancet body 131 with the front end portion 203a of the push rod 203. Therefore, the internal state of the lancet assembly 100 actually becomes Figure 9B the state as shown. Therefore, in a top view, it becomes a state where the protrusion 125 provided outside the side portion 121 of the lancet engaging member 120 is positioned in front of the protrusion 117 provided on the inner surface of the lancet housing 110. With this configuration, even if the lancet assembly 100 is pulled outwards (in the puncturing direction / advancing direction) at the above-mentioned mid-way loading time and the lancet housing 110 is moved forward, the protrusion 117 of the lancet housing 110 can be engaged with the protrusion 125 of the lancet engaging member 120. Therefore, the lancet housing 110 and the lancet engaging member 120 become an integrated state, and the lancet housing 110 and the lancet engaging member 120 move integrally in the forward direction.

[0213] And, if the integrated movement of the lancet housing 110 and the lancet engaging member 120 in the forward direction is started in the state where the lancet body 131 itself does not move forward as described above, then as in the same form as Figure 17E and Figure 17F shown, the lancet body 131 moves relatively backward with respect to the lancet engaging member 120. When this backward movement ends, the convex portion 131b formed on the upper surface side of the lancet body 131 abuts against the concave portion 120c (in a top view) of the lancet engaging member 120. Thereby, the concave portion of the lancet body 131 can be received by the concave portion 120c (in a top view) of the lancet engaging member 120, and further backward movement of the lancet body 131 can be avoided.

[0214] In addition, if the integrated movement of the lancet housing 110 and the lancet engaging member 120 in the forward direction is started in the state where the lancet body 131 itself does not move forward as described above, then as in the same form as Figure 17E and Figure 17F shown, the flexible wing portion 131d of the lancet body 131 crosses over the protrusion 129 provided behind the inner side of the side portion 121 of the lancet engaging member 120, and once the crossed flexible wing portion 131d engages with the protrusion 129. Thereby, the movement of the lancet body 131 in the puncturing direction (i.e., the forward direction) can be appropriately suppressed.

[0215] According to the above situation, even when the lancet assembly 100 is inadvertently pulled out externally during the loading process (at the moment when the protruding rear end portion 131a of the lancet body 131 engages with the front end portion 203a of the push rod 203), both the forward movement and the backward movement of the lancet body 131 with the puncturing member 133 whose front end portion 133a is exposed can be appropriately avoided.

[0216] In addition, as described above, if the lancet assembly 100 is pulled out externally (in the puncturing direction / forward direction) during the loading process, the protrusion 125 of the lancet engaging member 120 and the protrusion 117 of the lancet housing 110 will be in a state of being engaged with each other.

[0217] In addition, when starting the loading of the lancet assembly 100 into the syringe 200, the flexible locking portion 127 (refer to Figure 9B ) arranged behind the side portion 121 of the lancet engaging member 120 is temporarily flexed inward by the lancet assembly receiving member 204. As a result, the engagement between the protrusion 128 and the clearance portion provided on the inner side surface of the lancet housing 110 is temporarily released. However, if the lancet assembly 100 is pulled out during the loading process (at the moment when the protruding rear end portion 131a of the lancet body 131 engages with the front end portion 203a of the push rod 203), the flexible locking portion 127 of the lancet engaging member 120 that is temporarily flexed inward will be opened, so that it can engage with the clearance portion provided on the inner side surface of the lancet housing 110 again.

[0218] As a result, even when the lancet assembly 100 is pulled out externally during the loading process, both (1) the engagement between the protrusion 125 of the lancet engaging member 120 and the protrusion 117 of the lancet housing 110, and (2) the engagement between the flexible locking portion 127 of the lancet engaging member 120 and the clearance portion provided on the inner side surface of the lancet housing 110 can be achieved. Therefore, both the forward movement and the backward movement of the lancet engaging member 120 within the lancet housing 110 can be appropriately avoided.

[0219] According to the above situation, even when the lancet assembly 100 is inadvertently pulled out externally during the loading process (at the moment when the protruding rear end portion 131a of the lancet body 131 engages with the front end portion 203a of the push rod 203), either the lancet engaging member 120 or the lancet body 131 with the puncturing member 133 whose front end portion 133a is exposed can be appropriately prevented from detaching from the lancet housing 110.

[0220] 3. Reloading configuration of the lancet assembly 100 into the syringe 200 after the end of the above-mentioned process 5

[0221] Figure 20AIt is a cross-sectional view schematically showing the state at the start of reloading the lancet assembly that has temporarily finished discharging into the syringe. Figure 20B It is a cross-sectional view schematically showing the state during the mid-stage of reloading the lancet assembly that has temporarily finished discharging into the syringe. Figure 20C It is a cross-sectional view schematically showing the state at the end of reloading the lancet assembly that has temporarily finished discharging into the syringe.

[0222] As described above, in the normal mode, the lancet assembly 100 is usually discharged from the syringe 200 according to the above-mentioned step 5 for disposal and the like. However, depending on the situation, as Figures 20A to 20C shown, it is considered that the lancet assembly 100 may be erroneously reloaded into the syringe 200 after the end of the above-mentioned step 5.

[0223] In this regard, if the reloading of the lancet assembly 100 into the syringe 200 is erroneously started after the end of the above-mentioned step 5 (refer to Figure 20A ), the rear end portion 131a of the lancet body 131 engages with the front end portion 203a of the push rod 203 (refer to Figure 20B ). At the time of this engagement, a force for moving in the forward direction, that is, the puncture direction, acts on the lancet engaging member 120 through the lancet assembly housing member 204.

[0224] And, when the reloading is completed, the protrusion 204a of the lancet assembly housing member 204 is engaged with the recess 111 provided on the outer surface of the lancet housing 110. Thereby, the inserted lancet housing 110 can be held fixed to the syringe 200 (refer to Figure 20C ).

[0225] Here, in this embodiment, the lancet assembly 100 that has temporarily finished discharging after the end of the above-mentioned step 5 is reloaded into the syringe 200. Therefore, as in the same states as shown in Figure 17E and Figure 17F , the state in which the flexible wing portion 131d of the lancet body 131 is engaged with the protrusion portion 129 of the lancet engaging member 120 can be maintained. Therefore, the state in which the lancet body 131 is prevented from moving in the puncture direction (i.e., the forward direction) can be maintained.

[0226] Based on the above situation, even if it is assumed that after the reloading of the lancet assembly 100 that has temporarily ended the discharge is completed, the user or a third party mistakenly presses the trigger lever 205 again, and a force acting in the forward direction is applied to the lancet body 131 via the push rod 203 connected to the compressed firing spring, the following effects can be achieved. Specifically, as described above, by maintaining the engagement state between the flexible wing portion 131d and the protrusion 129 of the lancet engaging member 120, it is possible to appropriately prevent the front end portion 133a of the puncturing member 133 provided on the lancet body 131 from being ejected to the outside.

[0227] In addition, assuming that even if a force for discharging again is further applied to the lancet assembly 100 that has completed reloading, it is the same as the Figure 17E and Figure 17F shown configuration. By maintaining the engagement state between the flexible wing portion 131d and the protrusion 129 of the lancet engaging member 120, it is possible to appropriately prevent the front end portion 133a of the puncturing member 133 provided on the lancet body 131 from being ejected to the outside. On this basis, at the time of the first discharge of the lancet assembly 100, since the flexible locking portion 126 of the lancet engaging member 120 has already been locked with the protrusion 117 of the lancet housing 110, it is also possible to prevent the lancet engaging member 120 from detaching from the lancet housing 110.

[0228] 4. Reloading configuration of the lancet assembly 100 into the syringe 200 after being pulled out externally at the intermediate stage of the above-mentioned process 1 (when the protruding rear end of the lancet body engages with the front end of the push rod) moment)

[0229] Figure 21A is a schematic cross-sectional view showing the state at the start of reloading the lancet assembly into the syringe after it has been pulled out externally during the loading into the syringe as shown in Figure 19C . Figure 21B is a schematic cross-sectional view showing the state during the reloading of the lancet assembly into the syringe after it has been pulled out externally during the loading into the syringe as shown in Figure 19C . Figure 21C is a schematic cross-sectional view showing the state at the end of reloading the lancet assembly into the syringe after it has been pulled out externally during the loading into the syringe as shown in Figure 19C .

[0230] As described above, in the normal mode, usually after the lancet assembly 100 is loaded into the syringe 200 according to the above-mentioned process 1, then the puncturing member 133 is ejected to the outside according to the above-mentioned process 2. However, depending on the situation, considering that at an intermediate moment of process 1 (the moment when the protruding rear end portion of the lancet body engages with the front end portion of the push rod), the lancet assembly 100 is inadvertently pulled out from the syringe to the outside, and then, as shown in Figures 21A to 21C the pulled-out lancet assembly 100 is reloaded into the syringe 200.

[0231] In this regard, if the lancet assembly 100 that has been erroneously started and pulled out midway is reloaded (refer to Figure 21A ), the rear end portion 131a of the lancet body 131 engages with the front end portion 203a of the push rod 203 (refer to Figure 21B ). At the time of this engagement, a force that moves in the forward direction, that is, the puncture direction, acts on the lancet engaging member 120 through the lancet assembly housing member 204.

[0232] Further, when this reloading is completed, the protrusion 204a of the lancet assembly housing member 204 is engaged with the recess 111 provided on the outer surface of the lancet housing 110. Thereby, the inserted lancet housing 110 can be held and fixed to the syringe 200 (refer to Figure 21C ).

[0233] Here, in this embodiment, the lancet assembly 100 that has been pulled out midway is reloaded into the syringe 200. Therefore, as in the same form as shown in Figure 17E and Figure 17F , the state in which the flexible wing portion 131d of the lancet body 131 is engaged with the protrusion 129 of the lancet engaging member 120 can be maintained. Therefore, the state in which the lancet body 131 is prevented from moving in the puncture direction (i.e., the forward direction) can be maintained.

[0234] Based on the above, even if it is assumed that after the reloading of the lancet assembly 100 that has temporarily completed the discharge is finished, the user or a third party erroneously presses the trigger lever 205 again, and a force that moves the lancet body 131 in the forward direction acts via the push rod 203 connected to the compressed striker spring, the following effects can be achieved. Specifically, as described above, by maintaining the engagement state between the flexible wing portion 131d and the protrusion 129 of the lancet engaging member 120, the front end portion 133a of the puncture member 133 provided on the lancet body 131 can be appropriately prevented from being ejected to the outside.

[0235] In addition, as shown in Figure 21B and Figure 21C , the lancet engaging member 120 moves forward in the puncture direction before the reloading is completed. During this forward movement, the flexible locking portion 126 passes over the protrusion 117 provided on the inner side surface of the lancet housing 110 in a plan view. Once it has passed over, the flexible locking portion 126 can be engaged with the protrusion 117 of the lancet housing 110. Thereby, at the end of the reloading, the backward movement of the lancet engaging member 120 can be suppressed within the lancet housing 110.

[0236] In addition, it is assumed that even if a force for discharging again is further applied to the lancet assembly 100 that has completed the reloading, it is the same asFigure 17E and Figure 17F Similarly to the form shown in Figure 17E and Figure 17F , by maintaining the engagement state between the flexible wing portion 131d and the protrusion 129 of the lancet engaging member 120, it is possible to appropriately prevent the front end portion 133a of the puncturing member 133 provided on the lancet body 131 from being ejected to the outside. On this basis, at the end of reloading, since the flexible engaging portion 126 of the lancet engaging member 120 is already engaged with the protrusion 117 of the lancet housing 110, it is also possible to prevent the lancet engaging member 120 from detaching from the lancet housing 110.

[0237] As described above, the embodiments of the present invention have been described, but the present invention is not limited thereto, and those skilled in the art can easily understand that various changes can be made.

[0238] Industrial Applicability

[0239] If a puncturing device composed of the above-described lancet assembly and syringe is used, blood collection can be performed more simply and safely. Therefore, this puncturing device is not limited to blood collection for diabetic patients and can be used in various applications where blood collection is required.

[0240] Description of Reference Numerals

[0241] 100…Lancet assembly; 110…Lancet housing; 111…Recess formed on the outer surface of the lancet housing; 112…Extension formed inside the lancet housing; 112a…Protruding portion of the extension; 112b…End portion of the extension; 112c…Specified portion of the extension; 113…Inclined portion formed inside the lancet housing; 114…Internal space of the lancet housing; 115…Open rear end of the lancet housing; 116…Puncture opening of the lancet housing; 117…Protrusion formed on the inner surface of the lancet housing; 118…Exposure opening of the lancet housing for the front end portion of the lancet engaging member to be exposed; 120…Lancet engaging member; 120a…Rear end portion of the lancet engaging member; 120b…Front end portion of the lancet engaging member; 120c…Concave portion of the lancet engaging member (when viewed from above); 121…Side portion of the lancet engaging member; 123…Bent portion provided on the back side of the lancet engaging member; 124…Concave portion of the lancet engaging member; 125…Protrusion of the lancet engaging member; 126…Flexible locking portion of the lancet engaging member; 127…Flexible locking portion of the lancet engaging member; 128…Protrusion provided on the flexible locking portion; 129…Protrusion formed inside the side portion of the lancet engaging member; 130…Lancet; 131…Lancet body; 131a…Convex rear end portion of the lancet body; 131b…Convex portion (protruding portion) formed on the main surface (upper surface) of the lancet body; 131c…Side portion of the lancet body; 131d…Flexible wing portion of the lancet body; 131e…Dam portion formed on the back side of the lancet body; 132…Lancet cap; 132a…Main cap portion of the lancet cap; 132b…Main cap portion of the lancet cap; 133…Puncture member; 133a…Front end portion of the puncture member; 134…Linking member; 200…Syringe; 201…Housing; 202…Sub - part; 202a…One end portion of the sub - part; 202b…The other end portion of the sub - part; 203…Pusher; 203a…Front end portion of the pusher; 203b…Protrusion of the pusher; 203c…Protrusion of the pusher; 204…Lancet assembly receiving member; 204a…Protrusion of the lancet assembly receiving member; 205…Trigger lever; 206…Main ejector portion; 206a…Ejecting portion of the main ejector portion; 206a1…Protruding portion located in the ejecting portion; 206b…Ejector extension portion of the main ejector portion; 207…Ejector knob; 208…Firing spring (ejection spring); 209…Return spring; 210…Adjusting ring; 211…Adjusting spring; 212…Indicator; 213…Dial; 214a…Restraining member; 214b…Restraining member; 215…Pin; 215a…One end of the pin; 215b…The other end of the pin; 216…Locking member; 217…Ejector; 217a…Front end portion of the ejector; 218…Hole formed in the sub - part; 219…Regulator (puncture depth adjusting member);300…Puncture device.;

Claims

1. A lancet assembly that can be loaded into a syringe, The lancet assembly is characterized in that, it includes a lancet, a lancet engaging member, and a lancet housing that houses the lancet and the lancet engaging member, The lancet is configured to have a lancet body, a lancet cap, and a puncturing member, The lancet engaging member is configured to have mutually separated and opposed sides, and the lancet body is disposed between the separated and opposed sides so as to be movable in the puncturing direction or in the direction opposite to the puncturing direction. The lancet body is configured to have two mutually opposed sides, and is configured to have a locking portion on at least one of the two sides, On at least one of the inner surfaces of the two mutually opposed sides of the lancet engaging member, it is configured to have a locked portion that can be locked with the locking portion of the lancet body, When a force that relatively moves the lancet body rearward in a direction opposite to the puncturing direction with respect to the lancet engaging member acts on the lancet body, the locking portion of the lancet body can be locked with the locked portion of the lancet engaging member.

2. The lancet assembly according to claim 1, characterized in that, The syringe is configured to have a push rod that can engage with the rear end portion of the lancet body and eject the lancet body in the puncture direction. The puncture member straddles the lancet body and the lancet cap and is present therebetween. The front end portion of the puncture member is covered by the lancet cap, and the lancet cap and the lancet body are integrally coupled via a coupling member. The lancet engaging member is provided in a state where it can abut against the lancet cap. When the lancet body is engaged with the push rod and the lancet assembly is loaded into the syringe, the lancet engaging member moves relatively forward in the puncture direction with respect to the lancet. As a result, the lancet cap is pressed by the lancet engaging member and separated from the lancet body, and the separated lancet cap can move to a position deviating from the puncture track of the puncture member within the lancet housing.

3. The lancet assembly according to claim 1, characterized in that, The locking portion provided on the side portion of the lancet body forms a wing-like portion.

4. The lancet assembly according to claim 2, characterized in that, The locking portion provided on the side portion of the lancet body forms a wing-like portion.

5. The lancet assembly according to any one of claims 1 to 4, characterized in that, The lancet body is configured to further have a convex portion on the main surface, and the lancet engaging member is configured to further have a concave portion at the rear end portion in a plan view. When the lancet body moves relatively rearward in the direction opposite to the puncture direction with respect to the lancet engaging member, the convex portion of the lancet body can abut against the concave portion of the lancet engaging member.

Images