Syringe, lancet assembly, and lancing device

Abstract

The present invention provides a syringe that can function safely. In one embodiment of the invention, a syringe is provided that can be filled with a lancet assembly. The syringe is configured to have a housing composed of at least two sub-parts that are separable from each other and extend in the puncture direction. One end of each sub-part in a direction different from the puncture direction is restrained from the other end by restraining members.

Description

Technical Field

[0001] This invention relates to syringes, lancet assemblies, and puncture devices. Background Technology

[0002] A puncture device is used to collect small amounts of blood from patients, such as diabetic patients, to measure blood glucose levels. The device comprises a syringe for loading a lancet assembly and a lancet assembly that can be loaded into the syringe. The lancet assembly includes a lancet with a puncture component configured to puncture a predetermined site on the body. The syringe has the function of launching the lancet toward the predetermined site.

[0003] In use, after loading the lancet assembly into the syringe, the compressed spring inside the syringe extends, causing the lancet to be launched towards the designated site. This allows the lancet's puncture component to puncture the patient's body at the designated location, thereby collecting blood.

[0004] Patent Document 1: US Patent No. 5,385,571

[0005] As described above, puncture devices are used to puncture a designated part of the body with a lancet to collect blood, and therefore the syringe and lancet assembly, which are its components, are required to function safely. Summary of the Invention

[0006] In view of this situation, the object of the present invention is to provide a syringe and lancet assembly that can function safely.

[0007] To achieve the above objectives, in one embodiment of the present invention,

[0008] A syringe is provided that can be loaded into a lancet assembly.

[0009] The syringe is configured to have a casing, which is composed of at least two sub-parts that are detachable from each other and extend along the puncture direction.

[0010] Each sub-part in a direction different from the aforementioned puncture direction has one end bound to the other and the other end bound to the other by a restraining component.

[0011] To achieve the above objectives, in one embodiment of the present invention,

[0012] A syringe is provided that can be loaded into a lancet assembly.

[0013] The syringe is configured to have an ejector for discharging the loaded lancet assembly described above.

[0014] The aforementioned ejector is configured to have an ejector main body and an ejector knob.

[0015] The aforementioned ejector knob can be rotated independently of the ejector main body.

[0016] To achieve the above objectives, in one embodiment of the present invention,

[0017] A lancet assembly is provided that can be loaded into a syringe.

[0018] The bloodletting needle assembly includes a bloodletting needle, a bloodletting needle engaging component, and a bloodletting needle housing that houses the bloodletting needle and the bloodletting needle engaging component.

[0019] The bloodletting needle consists of a bloodletting needle body, a bloodletting needle cap, and a puncture component.

[0020] The aforementioned lancet engaging component is configured to have mutually separated and opposing sides, and the lancet body is disposed between these separated and opposing sides in a manner that allows it to move in the puncture direction or in the opposite direction to the puncture direction. The lancet body is configured to have two mutually opposing sides, and at least one of the two sides is configured to have a locking portion.

[0021] At least one of the inner surfaces of the two opposing sides of the aforementioned bloodletting needle engaging component is configured to have a locking portion capable of locking with the locking portion of the aforementioned bloodletting needle body.

[0022] When the main body of the bloodletting needle exerts a force that moves backward relative to the bloodletting needle engaging component in a direction opposite to the puncture direction, the locking portion of the main body of the bloodletting needle can engage with the locked portion of the bloodletting needle engaging component.

[0023] To achieve the above objectives, in one embodiment of the present invention,

[0024] A lancet assembly is provided that can be loaded into a syringe.

[0025] The bloodletting needle assembly includes a bloodletting needle, a bloodletting needle engaging component, and a bloodletting needle housing that houses the bloodletting needle and the bloodletting needle engaging component.

[0026] The bloodletting needle consists of a bloodletting needle body, a bloodletting needle cap, and a puncture component.

[0027] The puncture component spans and exists within the lancet body and lancet cap, the front end of the puncture component is covered by the lancet cap, and the lancet cap is integrally joined to the lancet body via a connecting component.

[0028] The lancet engaging component and the lancet cap are configured to abut against each other.

[0029] The lancet engaging component is configured to have mutually separated and opposing sides, and the lancet body is arranged between these separated and opposing sides in a manner that allows it to move in the puncture direction or in the opposite direction to the puncture direction.

[0030] The aforementioned bloodletting needle cap is configured such that, when viewed from above, it has a main cap portion and a protruding portion continuous with at least one of the main cap portions.

[0031] The side of the aforementioned lancet engaging component is configured to have a recessed portion capable of accommodating the protruding portion of the aforementioned lancet cap.

[0032] The syringe is configured to have a push rod that engages with the rear end of the lancet body and propels the lancet body in the puncture direction. Before loading the syringe, the lancet housing and the lancet are locked together.

[0033] When the lancet body is engaged with the push rod to load the lancet assembly, the lancet engagement component moves forward relative to the lancet in the puncture direction. The lancet cap is pressed by the lancet engagement component, the connecting component is broken, and the lancet cap separates from the lancet body. The separated lancet cap can move within the lancet housing to a position deviating from the puncture path of the puncture component.

[0034] The protruding portion of the lancet cap, having completed the aforementioned movement, is housed in the recessed portion provided on the side of the lancet cap.

[0035] To achieve the above objectives, in one embodiment of the present invention,

[0036] A lancet assembly is provided that can be loaded into a syringe.

[0037] The bloodletting needle assembly includes a bloodletting needle, a bloodletting needle engaging component, and a bloodletting needle housing that houses the bloodletting needle and the bloodletting needle engaging component.

[0038] The bloodletting needle consists of a bloodletting needle body, a bloodletting needle cap, and a puncture component.

[0039] The puncture component spans and exists within the lancet body and lancet cap, the front end of the puncture component is covered by the lancet cap, and the lancet cap is integrally joined to the lancet body via a connecting component.

[0040] The lancet engaging component and the lancet cap are configured to abut against each other.

[0041] The lancet engaging component is configured to have mutually separated and opposing sides, and at least the lancet engaging component and the lancet housing are configured to contain a sliding resin, such that the side of the lancet engaging component can slide within the lancet housing in the puncture direction or in the opposite direction to the puncture direction between the separated and opposing sides.

[0042] According to one embodiment of the present invention, a syringe and lancet assembly that can function safely can be provided. Attached Figure Description

[0043] Figure 1 This is a perspective view schematically illustrating a puncture device according to one embodiment of the present invention.

[0044] Figure 2 This is a perspective view schematically illustrating a bloodletting needle assembly according to one embodiment of the present invention.

[0045] Figure 3A It is a schematic perspective view of the bloodletting needle housing, which is a component of the bloodletting needle assembly.

[0046] Figure 3B It is a schematic cross-sectional view of the lancet housing, which is a component of the lancet assembly.

[0047] Figure 4A It is a schematic three-dimensional diagram of a bloodletting needle, which is a component of a bloodletting needle assembly.

[0048] Figure 4B It is a perspective view schematically showing the back side of the bloodletting needle, which is a component of the bloodletting needle assembly.

[0049] Figure 5A It is a schematic perspective view of the bloodletting needle engaging component, which is a constituent element of the bloodletting needle assembly.

[0050] Figure 5B This is a schematic cross-sectional view of the bloodletting needle engaging component, which is a constituent element of the bloodletting needle assembly.

[0051] Figure 6 This is a schematic perspective view of the syringe according to one embodiment of the present invention.

[0052] Figure 7 This is an exploded perspective view schematically illustrating a syringe according to one embodiment of the present invention.

[0053] Figure 8A It is a schematic three-dimensional diagram representing an integrally assembled ejector.

[0054] Figure 8BIt is a schematic three-dimensional diagram showing the components of the ejector.

[0055] Figure 9A It is a schematic cross-sectional view showing the shape of the syringe before the lancet assembly is loaded.

[0056] Figure 9B This is a schematic top view of the lancet assembly before loading.

[0057] Figure 9C It is a schematic cross-sectional view of the lancet assembly before loading.

[0058] Figure 10 It is a schematic cross-sectional view showing the shape after the lancet assembly is loaded into the syringe.

[0059] Figure 11A It is a schematic cross-sectional view (thickness direction) showing the shape of the lancet assembly at the end of the syringe loading process.

[0060] Figure 11B It is a schematic cross-sectional view (width direction) showing the shape of the lancet assembly at the end of the syringe loading process.

[0061] Figure 11C This is a schematic top view of the lancet assembly at the end of loading.

[0062] Figure 11D It is a schematic cross-sectional view of the lancet assembly at the end of loading.

[0063] Figure 12 It is a schematic cross-sectional view (in the thickness direction) showing the shape of the syringe trigger rod when it is pressed in.

[0064] Figure 13 It is a cross-sectional view (in the thickness direction) schematically showing the ejection shape of the puncture component.

[0065] Figure 14 It is a cross-sectional view (in the thickness direction) schematically showing the retraction of the puncture component.

[0066] Figure 15A It is a schematic cross-sectional view (in the thickness direction) showing the shape at the end of the puncture.

[0067] Figure 15B This is a schematic top view of the lancet assembly at the end of the puncture.

[0068] Figure 16A It is a schematic cross-sectional view (in the thickness direction) showing the shape after the re-fastening begins.

[0069] Figure 16BIt is a schematic cross-sectional view (in the thickness direction) showing the shape at the end of the re-fastening.

[0070] Figure 17A It is a schematic cross-sectional view (thickness direction) showing the shape of the bloodletting needle assembly at the beginning of its discharge.

[0071] Figure 17B It is a schematic cross-sectional view (in the thickness direction) showing the shape of the protrusion of the push rod and the trigger rod locking after the bloodletting needle assembly has started to be ejected.

[0072] Figure 17C It is a cross-sectional view (in the thickness direction) schematically showing the state in which the push rod is released from the rear end of the lancet body after the ejection of the lancet assembly begins.

[0073] Figure 17D It is a schematic cross-sectional view (thickness direction) showing the shape of the bloodletting needle assembly at the end of its discharge.

[0074] Figure 17E This is a schematic top view of the bloodletting needle assembly at the end of the discharge process.

[0075] Figure 17F It is a schematic cross-sectional view (thickness direction) of the lancet assembly at the end of the lancet discharge.

[0076] Figure 18A It is a schematic cross-sectional view showing the shape of the lancet assembly at the beginning of withdrawal after loading into the syringe is completed.

[0077] Figure 18B It is a schematic cross-sectional view showing the shape of the lancet assembly being pulled outwards after the syringe has been filled.

[0078] Figure 18C It is a schematic cross-sectional view showing the shape of the lancet assembly after it has been loaded into the syringe and withdrawn outwards.

[0079] Figure 19A It is a schematic cross-sectional view showing the shape of the lancet assembly at the beginning of its withdrawal from the syringe during the loading process (the moment when the protruding rear end of the lancet body engages with the front end of the plunger).

[0080] Figure 19B It is a cross-sectional view schematically showing the shape of the lancet assembly when it is being withdrawn from the syringe during the loading process (the moment when the protruding rear end of the lancet body engages with the front end of the plunger).

[0081] Figure 19CIt is a schematic cross-sectional view showing the shape of the lancet assembly at the end of its withdrawal from the syringe, during the loading process (the moment when the protruding rear end of the lancet body engages with the front end of the plunger).

[0082] Figure 20A It is a schematic cross-sectional view showing the configuration of the lancet assembly, which has temporarily stopped being discharged, as it begins to reload into the syringe.

[0083] Figure 20B It is a schematic cross-sectional view showing the shape of the lancet assembly during reloading into the syringe after the discharge has been temporarily stopped.

[0084] Figure 20C It is a schematic cross-sectional view showing the shape of the lancet assembly at the end of reloading into the syringe after the temporary termination of discharge.

[0085] Figure 21A It is a schematic representation of... Figure 19C The diagram shows a cross-sectional view of the lancet assembly after it has been withdrawn from the syringe during loading, and its state at the start of reloading.

[0086] Figure 21B It is a schematic representation of... Figure 19C The diagram shows a cross-sectional view of the lancet assembly during reloading of the syringe after it has been withdrawn from the syringe during the filling process.

[0087] Figure 21C It is a schematic representation of... Figure 19C The diagram shows a cross-sectional view of the lancet assembly after it has been withdrawn from the syringe during loading, and its shape at the end of reloading. Detailed Implementation

[0088] Hereinafter, with reference to the accompanying drawings, a syringe, a lancet assembly, and a puncture device configured to have a syringe and a lancet assembly according to one embodiment of the present invention will be described.

[0089] In this specification, the "puncture direction" (i.e., the direction in which the puncture component moves toward the puncture site during puncture) of the main body of the lancet during puncture is defined as the "forward" direction, and the opposite direction is defined as the "rear" direction. In addition, the "puncture direction" is equivalent to the direction from the open end of the lancet housing toward the puncture opening, which is equivalent to "front".

[0090] The inventors of this application have diligently studied a syringe, a lancet assembly, and a puncture device configured to have the above-described syringe and lancet assembly, and as a result, have proposed an embodiment of the present invention.

[0091] Figure 1This is a perspective view schematically illustrating a puncture device according to one embodiment of the present invention.

[0092] like Figure 1 As shown, one embodiment of the puncture device 300 of the present invention is configured to include a lancet assembly 100 and a syringe 200 capable of loading the lancet assembly 100. Although described later, in use, after the lancet assembly 100 is loaded into the syringe 200, a compressed spring within the syringe 200 extends, causing the lancet, a component of the lancet assembly 100, to be fired toward a predetermined part of the patient's body. Thus, a small amount of blood can ultimately be collected from the patient.

[0093] <Structure of the bloodletting needle assembly 100>

[0094] The following describes the bloodletting needle assembly 100, which is a component of the puncture device 300.

[0095] Figure 2 This is a perspective view schematically illustrating a bloodletting needle assembly according to one embodiment of the present invention. Figure 3A It is a schematic perspective view of the bloodletting needle housing, which is a component of the bloodletting needle assembly. Figure 3B It is a schematic cross-sectional view of the lancet housing, which is a component of the lancet assembly. Figure 4A It is a schematic three-dimensional diagram of a bloodletting needle, which is a component of a bloodletting needle assembly. Figure 4B It is a perspective view schematically showing the back side of the bloodletting needle, which is a component of the bloodletting needle assembly. Figure 5A It is a schematic perspective view of the bloodletting needle engaging component, which is a constituent element of the bloodletting needle assembly. Figure 5B This is a schematic cross-sectional view of the bloodletting needle engaging component, which is a constituent element of the bloodletting needle assembly.

[0096] like Figures 2 to 5B As shown, an embodiment of the present invention relates to a lancet assembly 100 having a structure in which a lancet 130 is integrally housed within a lancet housing 110 and a lancet engaging member 120 capable of advancing relative to the lancet 130.

[0097] (Carrier of the lancet)

[0098] like Figure 3A As shown, the lancet housing 110 is, for example, generally cylindrical. However, the shape of the lancet housing 110 is not necessarily limited to a cylindrical shape; for example, it can also be a prismatic shape. Figure 3AAs shown, a recess 111 is provided on the outer surface of the lancet housing 110 (particularly the rear end region of the outer surface of the housing). Preferably, the recess 111 is annular along the circumference of the main body of the lancet housing. When the lancet housing 110 is inserted into the syringe 200, the recess 111 engages with a protrusion of the lancet assembly receiving member provided within the syringe 200. This allows the temporarily inserted lancet housing 110 to be held and fixed within the syringe 200.

[0099] Additionally, the lancet housing 110 has an open rear end 115 on the rear end side and an open front end (puncture opening 116 / exposed opening 118 of the front end portion 120b of the lancet engaging component) on the front end side along its long side. The puncture opening 116 corresponds to the portion placed at the designated site (e.g., the fingertip) where puncture is to be performed.

[0100] like Figure 3B As shown, the lancet housing 110 has an internal space 114, in which the lancet 130 and the lancet engaging member 120 are housed, which are movable in the puncture direction or in the opposite direction to the puncture direction. Furthermore, the lancet housing 110 is configured to have an extension 112 with a protruding portion 112a extending in the puncture direction and an inclined portion 113 in the internal space 114.

[0101] The protruding portion 112a of the extension 112 is positioned to engage with a dam portion provided on the back side of the lancet body, which is a component of the lancet 130 described later. The end portion 112b of the extension 112 is configured to abut against a curved portion 123 provided on the back side of the lancet engaging member 120 described later. To achieve abutment against this curved portion 123, the end portion 112b of the extension 112 has an inclined structure. Furthermore, by abutting against the curved portion 123 of the lancet engaging member 120, the extension 112 can bend downwards with a predetermined portion 112c of the extension 112 as a base point.

[0102] The inclined portion 113 is positioned at the front end of the internal space 114 of the lancet housing 110 and is configured to allow the lancet cap, which is a component of the lancet 130 described later, to move upward.

[0103] A protrusion 117 is provided on the inner surface (specifically, the inner side surface) of the lancet housing 110. Before loading, this protrusion 117 is positioned, in view from above, behind the protrusion 125 of the lancet engaging member 120 and in front of the flexible locking portion 126. Furthermore, the protrusion 117 of the lancet housing 110 is configured to engage the protrusion 125 of the lancet engaging member 120, which is positioned in front when viewed from above. With this structure, before loading, the engagement of the protrusion 117 of the lancet housing 110 with the protrusion 125 of the lancet engaging member 120 prevents backward movement of the lancet engaging member 120 within the lancet housing 110. In addition, the protrusion 117 of the lancet housing 110 is configured such that the flexible locking part 126 of the lancet engaging part 120, which is located at the rear when viewed from above, can pass over the protrusion 117, but once it passes over, it cannot retract and pass over the protrusion 117 again.

[0104] Furthermore, a gap is provided at the rear of the inner surface (specifically, the inner side surface) of the lancet housing 110. This gap can engage with a flexible locking portion 127 (with a protrusion 128) located at the rear of the side portion 121 of the lancet engaging member 120. This locking prevents the lancet engaging member 120 from moving forward in the puncture direction (i.e., forward) within the lancet housing 110 before loading.

[0105] (Bloodletting needle)

[0106] like Figure 4A and Figure 4B As shown, the lancet 130 is configured to have a lancet body 131, a lancet cap 132, and a puncture component 133. The puncture component 133 spans and exists between the lancet body 131 and the lancet cap 132, the front end 133a of the puncture component 133 is covered by the lancet cap 132, and the lancet cap 132 and the lancet body 131 are connected via a connecting component 134.

[0107] The connecting member 134 is configured to break easily under the application of an external force. Although described later, 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 puncture direction. This forward movement of the lancet engaging member 120 presses the lancet cap 132 against it. This causes the connecting member 134, which connects the lancet cap to the connecting member 134, to break. As a result, the lancet cap 132 separates from the lancet body 131.

[0108] In addition, such as Figure 4A and Figure 4BAs shown, the main body 131 of the bloodletting needle is configured to have a protruding rear end 131a, a protrusion 131b (protruding part) formed on the main surface, a flexible wing 131d formed on the side 131c, and a dam part 131e formed on the back side.

[0109] The protruding rear end 131a can engage with the front end 203a of the push rod 203, which will be described later. The protrusion 131b formed on the upper surface of the lancet body 131 can abut against the recess 120c (when viewed from above) of the lancet engaging member 120, which will be described later. The flexible wing 131d can engage with the protrusion 129 formed on the inner side of the side portion 121 of the lancet engaging member 120, which will be described later. The front portion of the dam portion 131e formed on the back side of the lancet body 131 can engage with the protrusion 112a provided in the lancet housing 110. This engagement can suppress the forward movement of the lancet body 131 in the puncture direction (i.e., forward).

[0110] The lancet cap 132 is configured to have a main cap portion 132a and a protruding portion 132b continuous with at least one of the main cap portion 132a. The protruding portion 132b of the lancet cap 132 can be received in a recess provided on the side of the lancet engaging member 120 described later.

[0111] (Bloodletting needle locking components)

[0112] like Figure 5A As shown, the lancet engaging component 120 is configured to have two opposing sides 121 that are separated from each other along the puncture direction. Between these opposing sides 121, the lancet body 131 of the lancet 130 can move in the puncture direction or in the opposite direction to the puncture direction.

[0113] like Figure 5A As shown, the side portion 121 of the lancet engaging member 120 is configured with a recessed portion 124 having a protruding portion 132b capable of receiving the lancet cap 132. Although described later, when the lancet assembly 100 is loaded into the syringe 200, the lancet engaging member 120 can move forward relative to the lancet 130 in the puncture direction. When the lancet engaging member 120 moves forward, the protruding portion 132b of the lancet cap 132 received in the recessed portion 124 of the lancet engaging member 120 also experiences a force that moves forward. As a result, the lancet cap 132 can be separated from the lancet body 131.

[0114] Furthermore, the protruding portion 132b of the lancet cap 132 is received within the recessed portion 124 of the lancet engaging member 120, so that when the lancet engaging member 120 moves forward, the separated lancet cap 132 can also move forward together. As described above, the inclined portion 113 provided in the lancet housing 110 is positioned at the front end 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. Through this movement, the lancet body 131, with the puncture member 133 subsequently exposed at its front end, does not contact the lancet cap 132, allowing the puncture member 133 to protrude outward through the puncture opening 116 provided at the front end of the lancet housing 110.

[0115] In particular, in one embodiment of the present invention, the recessed portion 124 provided on the side 121 of the lancet engaging member 120 can accommodate the protruding portion 132b of the lancet cap 132 at any stage before and after the lancet cap 132 separates from the lancet body 131. That is, at any stage before and after separation, the protruding portion 132b of the lancet cap 132 is accommodated in the recessed portion 124 provided on the side 121 of the lancet engaging member 120. Specifically, from before the lancet cap 132 separates from the lancet body 131 until the movement of the lancet cap 132 from the lancet body 131 and moves to a position deviating from the puncture track of the puncture member 133 ends, the protruding portion 132b of the lancet cap 132 is always accommodated in the recessed portion 124.

[0116] As described above, the separated lancet cap 132, moving forward, 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. This prevents the lancet body 131 with the exposed puncture member 133 from contacting the lancet cap 132. Furthermore, in one embodiment of the invention, the protruding portion 132b of the lancet cap 132 is received in the recessed portion 124 not only before separation but also after separation, thus preventing the lancet cap 132 from tilting as a whole when viewed from above and / or the side after separation. As a result, the lancet body 131 with the exposed puncture member 133 does not contact the lancet cap 132 but moves within the lancet housing 110 along the puncture direction, thereby allowing the front end of the puncture member 133 to be appropriately exposed through the puncture opening 116.

[0117] A protrusion 125, a flexible locking portion 126, and a flexible locking portion 127 (with a protrusion 128) are provided on the outer side of the side portion 121 of the lancet engaging component 120. The protrusion 125 of the lancet engaging component 120 is positioned in front of the protrusion 117 provided on the inner side of the lancet housing 110. This configuration prevents the lancet engaging component 120 from retracting within the lancet housing 110 before loading. The flexible locking portion 127 (with a protrusion 128) is positioned behind the side portion 121 of the lancet engaging component 120 and can engage with the gap provided on the inner side of the lancet housing 110. This engagement prevents the lancet body 131 from advancing in the puncture direction (i.e., forward).

[0118] like Figure 5A As shown, a 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 puncture direction before the loading is completed, and during its forward movement, the flexible locking portion 126, when viewed from above, can pass over the protrusion 117 provided on the inner surface of the lancet housing 110. On the other hand, once the flexible locking portion 126 passes over the protrusion 117, it does not retract. Therefore, at the end of loading, the retraction movement of the lancet engaging member 120 can be suppressed within the lancet housing 110.

[0119] A protrusion 129 is provided on the inner rear side of the side portion 121 of the lancet engaging component 120. This protrusion 129 is configured such that when the lancet body 131 moves backward relative to the lancet engaging component 120, the flexible wing 131d of the lancet body 131 can pass over the protrusion 129, but once it passes, it becomes locked with the protrusion 129 and cannot pass over it again in the forward direction. By locking the flexible wing 131d relative to the protrusion 129 of the lancet engaging component 120, the movement of the lancet body 131 in the puncture direction (i.e., the forward direction) can be appropriately suppressed.

[0120] In addition, such as Figure 5B As shown, the lancet engaging member 120 is configured to have a curved portion 123 with a curved 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 relative to the lancet 130 in the puncture direction. By moving the lancet engaging member 120 forward, the curved portion 123 of the lancet engaging member 120 can abut against the end 112b (a component of the lancet housing 110) of the extension 112 with an inclined structure.

[0121] Furthermore, as described above, the side portion 121 of the lancet engaging member 120 is movable within the lancet housing 110 in the puncture direction (forward direction) or in the opposite direction (reverse direction). Preferably, both the lancet engaging member 120 and the lancet housing 110 are configured to contain a sliding resin, so that the lancet engaging member 120 can move smoothly back and forth within the lancet housing 110, i.e., it can slide. Based on this, it is preferable that the lancet body 131 and lancet cap 132, which are components of the lancet 130, are also configured to contain the aforementioned sliding resin. Although not specifically limited, the sliding resin can be at least one thermoplastic resin selected from the group consisting of polypropylene, polyacetal, polyethylene, polystyrene, and ABS resin.

[0122] <Structure of Syringe 200>

[0123] The syringe 200, which is a component of the puncture device 300, will be described below.

[0124] Figure 6 This is a schematic perspective view of the syringe according to one embodiment of the present invention. Figure 7 This is an exploded perspective view schematically illustrating a syringe according to one embodiment of the present invention.

[0125] like Figure 6 and Figure 7 As shown, in one embodiment of the present invention, the syringe 200 is configured such that the constituent elements of the syringe 200 are housed within a housing 201. The constituent elements of the syringe 200 housed within the housing 201 include a plunger 203, a lancet assembly housing 204, a trigger rod 205, an ejector 217, a firing pin spring (ejection spring) 208 / reset spring 209 provided on the plunger 203, a locking member 216, an adjuster (puncture depth adjustment member) 209, and an adjustment ring 210, etc.

[0126] The push rod 203 is configured along the long side axis of the syringe 200, and has the function of launching the lancet body 131 in the puncture direction. The front end 203a of the push rod 203 can engage with the rear end 131a of the lancet body 131 (see reference). Figure 4A Engagement. When the lancet body 131 is inserted into the syringe 200 while loading the lancet assembly 100, the front end 203a of the push rod 203 engages with the rear end 131a of the lancet body 131. Subsequently, if the lancet body 131 is further inserted rearward, the push rod 203 is pressed rearward. As a result, the firing pin spring 208 provided on the push rod 203 is compressed. The compression of the firing pin spring 208 means that the force required for the firing of the puncture member 133 is stored in the push rod 203.

[0127] The lancet assembly receiving component 204 serves to store the lancet assembly during use and also facilitates cap removal during loading. The lancet assembly receiving component 204 is cylindrical or ring-shaped overall and has a front protrusion inside.

[0128] The receiving member 204 is itself provided at the front opening of the syringe and receives the lancet assembly inserted during use. That is, it is configured to load the lancet assembly into the syringe in such a way that a part of the lancet housing is housed in the receiving member 204. During the loading operation into the syringe 200, when the lancet assembly is inserted into the receiving member 204, the presence of the front protrusion exerts a forward force on the lancet engaging member 120 (especially a force that moves forward relative to the lancet housing).

[0129] Specifically, when the lancet assembly is inserted into the receiving member 204, the rear end 120a of the lancet engaging member abuts against the front protrusion of the lancet assembly receiving member 204. If the lancet housing 110 is further inserted, it is pressed by the front protrusion, causing the lancet engaging member 120 to move forward within the lancet housing.

[0130] That is, due to the contact between the rear end 120a of the lancet engaging component inserted into the syringe and the front protrusion of the receiving component 204, a force is exerted on the lancet engaging component that moves forward relative to the lancet housing. As a result, the lancet cap is pressed by the lancet engaging component, and as a result, the lancet cap separates from the lancet body and moves to a position deviating from the puncture track.

[0131] Furthermore, the syringe 200 is configured to have a housing locking function. This function ensures that the lancet assembly remains in place and does not detach from the syringe even when subjected to force in the direction opposite to the insertion direction after the lancet assembly is inserted into the syringe. This housing locking is primarily achieved through a protrusion provided on the inner surface of the lancet assembly receiving member 204 and a recess provided on the outer surface of the lancet housing.

[0132] Figure 8A It is a schematic three-dimensional diagram representing an integrally assembled ejector. Figure 8B It is a schematic three-dimensional diagram showing the components of the ejector.

[0133] like Figure 8A and Figure 8BAs shown, the ejector 217 has the 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 ejector 217 is preferably elongated in shape. The ejector 217 is configured to have an ejector main portion 206 extending in the puncture direction and an ejector knob 207 located at the rear end of the ejector main portion 206 extending in the puncture direction.

[0134] The ejector main body 206 and the ejector knob 207 are integrally combined. The ejector main body 206 is configured with an ejection portion 206a for directly ejecting the lancet assembly 100 and an ejector extension portion 206b. The ejector extension portion is disposed between the ejection portion 206a and the ejector knob 207 for pulling the push rod 203 and locking it back in place. The ejection portion 206a and the ejector extension portion 206b are integrally combined. In addition, the ejector extension portion 206b has a region on its upper surface side for receiving the push rod 203 extending in the puncture direction.

[0135] If the ejector knob 207, provided at the rear end of the ejector 217, is pressed forward from the outside, the ejector 217 moves forward as a whole. As a result, the front end 217a of the ejector abuts against the rear end 120a of the lancet engaging member 120, thereby pressing the lancet engaging member 120. Therefore, if the ejector 217 is moved further forward after abutment, the lancet engaging member 120 can move forward within the lancet housing 110.

[0136] The lancet engaging member 120, having moved forward within the lancet housing 110, ultimately reaches its forwardmost position within the lancet housing. That is, the front end 120b of the lancet engaging member 120 ultimately abuts against the inner wall of the lancet housing 110. Therefore, if the ejector 217 is pressed further to move the lancet engaging member 120 forward, the lancet housing 110 is also pressed forward by the lancet engaging member 120. As a result, the entire lancet assembly 100 is pressed forward. Therefore, if the ejector 217 continues to move, the lancet assembly 100 is ultimately ejected from the syringe 200.

[0137] Here, in one embodiment of the present invention, the aforementioned ejector main portion 206 and ejector knob 207 are integrally combined, but the ejector knob 207 can be rotated independently of the ejector main portion 206. By adopting this structure, compared with the case where the ejector main portion 206 and ejector knob 207 are integrally formed as separate components, there are advantages in the following aspects.

[0138] Specifically, when the ejector knob 207 is pressed forward, the ejector knob 207 can rotate (i.e., twist). In this case, if the ejector main portion 206 and the ejector knob 207 are integrally formed as a separate component, there is a concern that the ejector main portion 206, which is integrated with the ejector knob 207, will also rotate simultaneously. As described above, the ejector extension portion 206b has a region on its upper surface side that accommodates the push rod 203 extending in the puncture direction. Therefore, if the ejector main portion 206 rotates, the ejector extension portion 206b, which is a component of it, can also rotate. Therefore, there is a concern that the push rod 203 located on the rotated ejector extension portion 206b and the lancet assembly 100 engaging with the push rod 203 will also rotate. The rotation of the lancet assembly 100 may make proper puncture through the puncture member difficult.

[0139] In contrast, in one embodiment of the present invention, the ejector knob 207 can be rotated independently of the ejector main portion 206. Therefore, even if the ejector knob 207 rotates (i.e., twists) when pressed forward, the ejector main portion 206, which is integrally combined with the ejector knob 207, can be prevented from rotating simultaneously. Therefore, the ejector extension portion 206b, which is a component of the ejector main portion 206, can also be prevented from rotating simultaneously. Therefore, the push rod 203 located on the ejector extension portion 206b and the lancet assembly 100 engaged with the push rod 203 can also be prevented from rotating. As a result, by preventing the lancet assembly 100 from rotating, proper puncture through the puncture member can be performed.

[0140] Furthermore, in one embodiment of the present invention, the casing 201 of the syringe 200 has the following characteristics. Specifically, the casing 201 is composed of at least two sub-parts 202 that are separable from each other and extend along the puncture direction, and one end 202a of each sub-part in a direction different from the puncture direction is restrained to each other by restraining members 214a, 214b respectively. Although not particularly limited, the restraining members 214a, 214b can be annular members that form a continuous opening shape from one side to the other.

[0141] The housing may be made of thermoplastic resin material, but according to the technical knowledge of those skilled in the art to date, the sub-parts of a housing made of thermoplastic resin material are usually connected and fixed to each other by ultrasonic welding. However, in ultrasonic welding, there may be concerns that the welding adjustment takes time, and the resin material melts out during welding, which may cause the components of the syringe 200 housed in the housing to malfunction.

[0142] Therefore, instead of the current approach of connecting and fixing sub-parts to each other using ultrasonic welding, as described above, in one embodiment of the invention, a method is adopted to bind one end 202a of each sub-part 202 to the other end 202b of each sub-part 202 to each other by means of binding members 214a, 214b.

[0143] By adopting this method, one end 202a of each sub-part can be bound together by the binding member 214a. That is, one end 202a of each sub-part can be embedded into each other in the binding member 214a. Similarly, the other end 202b of each sub-part can be bound together by the binding member 214b. That is, the other end 202b of each sub-part can be embedded into the binding member 214b.

[0144] Based on the above, one end 202a of each sub-part 202 and the other end 202b of each sub-part 202 can be respectively inserted into the restraining members 214a and 214b, thereby allowing the outer edges 202c and 202d of each sub-part 202 to abut against each other or make continuous contact along the piercing direction. Thus, it is possible to provide a single housing 201 that is entirely composed of each sub-part 202.

[0145] Furthermore, in one embodiment of the invention, it is preferable that the outer edges 202c and 202d of adjacent sub-parts 202 in the puncture direction can be interconnected. Specifically, a locking member 216 provided on the outer edge 202c of one sub-part 202 is locked to a locking member (not shown) provided on the outer edge 202d of the other sub-part 202. Thus, the outer edges 202c and 202d of one sub-part 202 that are in continuous contact can be properly connected and fixed by the binding members 214a and 214b.

[0146] Based on or instead of this, a pin 215, such as a spring pin, can be used. Specifically, each sub-part has a hole 218 with a diameter approximately the same as that of the pin 215 at or near its outer edge. 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. Thus, the outer edges 202c of one sub-part 202 and the outer edges 202d of another sub-part 202, which are in continuous contact, can also be properly connected and fixed by the binding members 214a and 214b.

[0147] <Usage Form>

[0148] The following describes the usage of the bloodletting needle assembly 100 and syringe 200 according to one embodiment of the present invention.

[0149] Before loading the bloodletting needle assembly

[0150] Figure 9A It is a schematic cross-sectional view showing the configuration of the syringe 200 before the lancet assembly 100 is loaded. Figure 9B This is a schematic top view of the lancet assembly 100 before loading. Figure 9C This is a schematic cross-sectional view of the lancet assembly 100 before loading.

[0151] like Figures 2 to 5B and Figures 9A to 9C As shown, before loading, the front portion of the dam portion 131e provided on the rear side of the lancet body 131 can engage with the protrusion 112a provided on the lancet housing 110. This engagement prevents the lancet body 131 from moving forward in the puncture direction (i.e., forward). Furthermore, before loading, the protrusion 128 of the flexible locking portion 127 formed behind the side portion 121 of the lancet engaging member 120 can engage with the gap provided on the inner side of the lancet housing 110. This engagement prevents the lancet engaging member 120 from moving forward in the puncture direction (i.e., forward) within the lancet housing 110 before loading. Furthermore, before loading, when viewed from above, a protrusion 125 provided on the outer side of the side 121 of the lancet engaging member 120 is positioned in front of a protrusion 117 provided on the inner side of the lancet housing 110. This configuration prevents backward movement of the lancet engaging member 120 within the lancet housing 110 before loading.

[0152] After the bloodletting needle assembly loading begins

[0153] Figure 10 It is a schematic cross-sectional view showing the shape of the lancet assembly 100 after it has been loaded into the syringe 200.

[0154] like Figure 10 As shown, when the syringe 200 begins loading the lancet assembly 100, the rear end 131a of the lancet body 131 engages with the front end 203a of the plunger 203. At this time, the flexible locking portion 127 (see reference 127) located behind the side 121 of the lancet engaging portion 120 is engaged by the lancet assembly receiving member 204. Figure 9B The protrusion 128 bends inward. This releases the locking between the protrusion 128 and the gap provided on the inner side of the lancet housing 110. In addition, when locked, the lancet assembly receiving member 204 exerts a force on the lancet locking member 120 in the forward direction, i.e., the puncture direction.

[0155] like Figure 5AAs shown, the side portion 121 of the lancet engaging member 120 is configured with a recessed portion 124 that can accommodate a protruding portion 132b of the lancet cap 132. If a force is applied that moves the lancet engaging member 120 in the forward direction, the protruding portion 132b of the lancet cap 132, which is accommodated in the recessed portion 124 of the lancet engaging member 120, is also subjected to a force that moves in the forward direction. As a result, the lancet cap 132 can be separated from the lancet body 131.

[0156] When the bloodletting needle assembly is fully loaded

[0157] Figure 11A It is a cross-sectional view (thickness direction) schematically showing the shape of the lancet assembly 100 at the end of loading into the syringe 200. Figure 11B It is a cross-sectional view (width direction) schematically showing the shape of the lancet assembly 100 at the end of loading into the syringe 200. Figure 11C This is a schematic top view of the lancet assembly 100 at the end of loading. Figure 11D This is a schematic cross-sectional view of the lancet assembly 100 at the end of loading.

[0158] At the end of loading, such as Figure 3A and Figure 11A As shown, a protrusion 203b provided on the outer side of the push rod 203 extending along the puncture direction is positioned behind the trigger rod 205, and the trigger rod 205 and the protrusion 203b are locked together. This suppresses the movement of the push rod 203 in the puncture direction, thus providing a standby state before ejection. Furthermore, at the end of loading, as... Figure 11B As shown, the protrusion 204a of the lancet assembly receiving member 204 engages with the recess 111 provided on the outer surface of the lancet housing 110. This allows the temporarily inserted lancet housing 110 to be held and fixed to the syringe 200.

[0159] like Figure 5A and Figure 11C As shown, the lancet engaging member 120 further includes a flexible locking portion 126 between a protrusion 125 provided on the outer side of a side portion 121 of the lancet engaging member 120 and a flexible locking portion 127 disposed behind the side portion 121. The lancet engaging member 120 moves forward in the puncture direction before the loading is completed, and during its movement, a protrusion 117 provided on the inner side of the lancet housing 110 (viewed from above) is configured to allow the flexible locking portion 126 to pass over it. On the other hand, the protrusion 117 is configured not to retract once the flexible locking portion 126 has passed over it. With this structure, the retraction movement of the lancet engaging member 120 can be suppressed within the lancet housing 110 at the end of loading.

[0160] In addition, such as Figure 5B and Figure 11D As shown, the lancet engaging component 120 is configured to have a curved portion 123 with a curved structure on its rear side. When the lancet assembly 100 is loaded into the syringe 200, the lancet engaging component 120 moves forward relative to the lancet 130 in the puncture direction. By moving the lancet engaging component 120 forward, the curved portion 123 of the lancet engaging component 120 can abut against the end 112b of the extension 112 with an inclined structure.

[0161] After the initial contact, if the lancet engaging component 120 moves further forward, the contact area between the bent portion 123 of the lancet engaging component 120 and the end 112b of the extension 112 within the lancet housing 110 increases. This increases the pressing force exerted by the bent portion 123 of the lancet engaging component 120 relative to the end 112b of the inclined extension 112. This pressing force causes a predetermined portion of the extension 112, including the protrusion 112a, to bend downwards, using a predetermined portion 112c of the extension 112 as a base point. This releases the locking between the protrusion 112a of the lancet housing 110 and the dam portion 131e of the lancet body 131. As a result, the lancet body 131 can move forward in the puncture direction (i.e., forward).

[0162] The protruding portion 132b of the lancet cap 132 is received within the recessed 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 along with it. The inclined portion 113 provided in the lancet housing 110 is positioned at the front end 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. Through this movement, the lancet body 131 with the exposed puncture member 133 at its front end does not contact the lancet cap 132, allowing the puncture member 133 to protrude outward through the puncture opening 116 provided at the front end of the lancet housing 110.

[0163] In particular, in one embodiment of the present invention, the recessed portion 124 provided on the side 121 of the lancet engaging member 120 can accommodate 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 accommodated in the recessed portion 124 provided on the side 121 of the lancet engaging member 120.

[0164] As described above, the separated lancet cap 132, moving forward, 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. This prevents the lancet body 131 with the exposed puncture member 133 from contacting the lancet cap 132. Furthermore, in one embodiment of the invention, the protruding portion 132b of the lancet cap 132 is received in the recessed portion 124 not only before separation but also after separation, thus preventing the lancet cap 132 from tilting as a whole when viewed from above and / or the side after separation. Therefore, in the subsequent ejection process of the puncture member 133, the lancet body 131 with the exposed puncture member 133 does not contact the lancet cap 132 and can move within the lancet housing 110 along the puncture direction. As a result, the tip of the puncture member 133 can be properly ejected outward through the puncture opening 116.

[0165] Trigger lever pressed in

[0166] Figure 12 This is a schematic cross-sectional view (thickness direction) showing the shape of the trigger rod 205 of the syringe 200 when it is pressed in.

[0167] After loading is completed, such as Figure 12 As shown, the trigger lever 205 is pressed in. By pressing in, one end of the trigger lever 205 moves upward, thereby releasing the protrusion 203b provided on the outer side of the push rod 203 extending along the puncture direction from the trigger lever 205.

[0168] Puncture component ejection

[0169] Figure 13 It is a cross-sectional view (in the thickness direction) schematically showing the ejection shape of the puncture component.

[0170] As described above, when the lancet assembly 100 is loaded, the push rod 203 is pressed rearward, thereby compressing the firing pin spring 208 provided on the push rod 203. In this compressed state, if the locking between the protrusion 203b and the trigger rod 205 is released, the compressed firing pin spring 208 extends, thereby allowing the lancet body 131 to move in the forward direction. This allows the tip of the puncture member 133 provided on the lancet body 131 to be appropriately ejected outward through the puncture opening 116.

[0171] puncture component retraction

[0172] Figure 14 It is a cross-sectional view (in the thickness direction) schematically showing the retraction of the puncture component.

[0173] When the puncture component 133 is ejected, the firing pin spring (ejection spring) 208 provided on the push rod 203 extends, while the return spring 209 can be compressed. The compressed return spring 209 exerts an elongating force, thus exerting a rearward force on the push rod 203. As a result, the lancet body 131, i.e., the puncture component 133, which engages with the push rod 203, can quickly retract after puncture.

[0174] At the end of the puncture

[0175] Figure 15A It is a schematic cross-sectional view (in the thickness direction) showing the shape at the end of the puncture. Figure 15B This is a schematic top view of the lancet assembly 100 at the end of the puncture.

[0176] like Figure 15A and Figure 15B As shown, after the puncture component 133 retracts, that is, after the lancet body 131, on which the puncture component 133 is provided, retracts, one end of the trigger rod 205 moves downward and abuts against the outer side of the push rod 203 extending along the puncture direction. Based on the above, the puncture performed using the puncture component 133 is completed.

[0177] Fasten again

[0178] Figure 16A It is a schematic cross-sectional view (in the thickness direction) showing the shape after the re-fastening begins. Figure 16B It is a schematic cross-sectional view (in the thickness direction) showing the shape at the end of the re-fastening.

[0179] After the puncture, such as Figure 16A As shown, begin pulling the pusher knob 207 backward. Then, as... Figure 16B As shown, if the pusher knob 207 is pulled further in the backward direction, the push rod 203 will retract, and the lancet body 131, which is engaged with the retracting push rod 203, will also retract.

[0180] Expulsion of the bloodletting needle assembly

[0181] Figure 17A It is a schematic cross-sectional view (thickness direction) showing the shape of the bloodletting needle assembly at the beginning of its discharge. Figure 17B It is a schematic cross-sectional view (in the thickness direction) showing the shape of the protrusion of the push rod and the trigger rod locking after the bloodletting needle assembly has started to be ejected. Figure 17C It is a cross-sectional view (in the thickness direction) schematically showing the state in which the push rod is released from the rear end of the lancet body after the ejection of the lancet assembly begins. Figure 17D It is a schematic cross-sectional view (in the thickness direction) showing the shape of the bloodletting needle assembly at the end of its discharge. Figure 17EThis is a schematic top view of the bloodletting needle assembly at the end of the discharge process. Figure 17F It is a schematic cross-sectional view (thickness direction) of the lancet assembly at the end of the lancet discharge.

[0182] After the puncture, such as Figure 17A As shown, press the ejector knob 207 in the puncture direction to begin discharging the bloodletting needle assembly. Next, as... Figure 17B As shown, pressing the ejector knob 207 in the puncture direction causes the lancet housing 110 and the lancet engaging component to be pressed in the puncture direction as well. At this time, the protrusion 203c of the push rod 203 engages with the trigger rod 205, thereby inhibiting the forward movement of the push rod 203 in the puncture direction. Next, as... Figure 17C As shown, the ejector knob 207 is pressed further in the puncture direction. Simultaneously, the lancet housing 110 and the lancet engaging component 120 are further pressed in the puncture direction, ultimately disengaging the lancet's rear end 131a from the push rod 203. The result is as follows: Figure 17D As shown, the lancet assembly 100 can be ejected from the syringe 200.

[0183] Furthermore, when the bloodletting needle assembly 100 is discharged, such as Figure 17E and Figure 17F As shown, the main body 131 of the lancet moves backward relative to the recessed portion 120c (viewed from above) formed on the rear side of the lancet engaging member 120. In one embodiment of the invention, after this backward movement ends, the protrusion (or convex portion) 131b formed on the upper surface side of the lancet main body 131 can abut against the recessed portion 120c (viewed from above) of the lancet engaging member 120. Thus, by receiving the recessed portion of the lancet main body 131 by the recessed portion 120c (viewed from above) of the lancet engaging member 120, further backward movement of the lancet main body 131 can be prevented.

[0184] Furthermore, as described above, when the lancet assembly 100 is ejected, the lancet body 131 moves backward relative to the lancet engaging member 120. At this time, the flexible wing 131d of the lancet body 131 passes over the protrusion 129 located behind the inner side of the side portion 121 of the lancet engaging member 120. However, once the flexible wing 131d has passed, it becomes locked with the protrusion 129 and cannot pass over the protrusion 129 again in the forward direction. Thus, the movement of the lancet body 131 in the puncture direction (i.e., the forward direction) can be appropriately suppressed.

[0185] Based on the above, it is possible to appropriately prevent both forward and backward movement of the lancet body 131, where the exposed puncture member 133 at the front end 133a is fixed, when the lancet assembly 100 is discharged. Furthermore, as described above, at the end of the loading phase before the discharge of the lancet assembly 100, the lancet engaging member 120 moves forward relative to the front end 133a. During this forward movement, once the flexible locking portion 126 passes the protrusion 117 on the inner side of the lancet housing when viewed from above, it will not pass the protrusion 117 again and retract. That is, the flexible locking portion 126 of the lancet engaging member 120 engages with the protrusion 117 of the lancet housing 110. This prevents the lancet engaging member 120 from detaching from the lancet housing 110.

[0186] As a result, according to one embodiment of the present invention, when the lancet assembly 100 is ejected, it is possible to appropriately prevent either the lancet engaging member 120 or the lancet body 131 with the exposed puncture member 133 at its front end 133a attached from the lancet housing 110. Consequently, after the lancet assembly 100 is ejected, it is possible to appropriately prevent the front end 133a of the puncture member 133 from piercing the skin. Therefore, according to one embodiment of the present invention, the used lancet assembly 100 can be disposed of in a safer environment.

[0187] As can be seen from the above, in one embodiment of the present invention, the following steps are generally performed sequentially.

[0188] Step 1: The process of loading the bloodletting needle assembly 100 into the syringe 200.

[0189] Step 2: The process of ejecting the puncture component, which is a component of the lancet assembly 100, after loading is completed.

[0190] Step 3: The step of retracting the ejected puncture component and ending the puncture process.

[0191] Step 4: The process of re-fastening by pulling the ejector knob backward.

[0192] Step 5: The process of discharging the bloodletting needle assembly 100 from the syringe 200 to the outside.

[0193] <Irregular Form>

[0194] Here, when using the puncture device 300 according to one embodiment of the present invention, for example, the following irregular form may be considered.

[0195] 1. The withdrawn state of the bloodletting needle assembly 100 at the end of the above-mentioned process 1.

[0196] Figure 18A It is a schematic cross-sectional view showing the shape of the lancet assembly at the beginning of withdrawal after loading into the syringe is completed. Figure 18B It is a schematic cross-sectional view showing the shape of the lancet assembly being pulled outwards after the syringe has been filled. Figure 18C It is a schematic cross-sectional view showing the shape of the lancet assembly after it has been loaded into the syringe and withdrawn outwards.

[0197] As described above, in the normal mode, after the lancet assembly 100 is loaded into the syringe 200 according to step 1, the puncture component 133 is ejected to the outside according to step 2. However, due to different circumstances, such as... Figures 18A-18C As shown, it is considered that before moving from step 1 to step 2, the lancet assembly 100, after being filled into the syringe, may be inadvertently pulled outward.

[0198] In this regard, at the end of the filling process, such as Figures 18A-18C As shown, a protrusion 203b provided on the outer side of the push rod 203 extending along the puncture direction is positioned behind the trigger rod 205, and the trigger rod 205 and the protrusion 203b are locked together. This suppresses movement of the push rod 203 in the puncture direction.

[0199] With the movement of the push rod 203 in the puncture direction suppressed, when the lancet assembly 100 is inadvertently pulled outward (in the puncture / forward direction), the lancet body 131 itself does not move forward because the protruding rear end 131a of the lancet body 131, which is a component of the lancet assembly 100, engages with the front end 203a of the push rod 203. On the other hand, the lancet body 110 and the lancet engaging member 120 become integrated due to the engagement of the flexible locking portion 126 of the lancet engaging member 120 and the protrusion 117 of the lancet housing 110. Therefore, if the lancet housing 110 is grasped by hand or the like and pulled outward (in the puncture / forward direction), the lancet housing 110 and the lancet engaging member 120 move together.

[0200] Based on the above, when the lancet assembly 100 is inadvertently pulled outwards, it... Figure 17E and Figure 17FAs shown, the lancet body 131 moves backward relative to the lancet engaging member 120. When this backward movement ends, the protrusion 131b formed on the upper surface of the lancet body 131 abuts against the recessed portion 120c (viewed from above) of the lancet engaging member 120. Thus, the recessed portion of the lancet body 131 can be accommodated by the recessed portion 120c (viewed from above) of the lancet engaging member 120, thereby preventing further backward movement of the lancet body 131.

[0201] Additionally, when the lancet assembly 100 is accidentally pulled outwards, it... Figure 17E and Figure 17F In the same configuration shown, the lancet body 131 moves backward relative to the lancet engaging member 120. At this time, the flexible wing 131d of the lancet body 131 passes over the protrusion 129 located behind the inner side of the side portion 121 of the lancet engaging member 120, and once passed, the flexible wing 131d engages with the protrusion 129. This appropriately suppresses movement of the lancet body 131 in the puncture direction (i.e., the forward direction).

[0202] Based on the above, even if the lancet assembly 100 is accidentally pulled outwards, it is possible to appropriately prevent both forward and backward movement of the lancet body 131, which has the exposed puncture member 133 at its front end 133a, from occurring. Furthermore, at the end of loading, the flexible locking portion 126 of the lancet engaging member 120 is engaged with the protrusion 117 of the lancet housing 110, thus preventing the lancet engaging member 120 from being pulled out of the lancet housing 110.

[0203] As a result, even if the lancet assembly 100 is accidentally pulled outward, it is possible to properly prevent either the lancet engaging component 120 or the lancet body 131 with the exposed puncture component 133 at the front end 133a attached from the lancet housing 110 from falling off.

[0204] 2. The withdrawal state of the bloodletting needle assembly 100 at the midpoint of the above-mentioned process 1 (the moment when the protruding rear end of the bloodletting needle body engages with the front end of the push rod).

[0205] Figure 19A It is a cross-sectional view schematically showing the shape of the lancet assembly at the beginning of its withdrawal from the syringe during the loading process (the moment when the protruding rear end of the lancet body engages with the front end of the plunger). Figure 19B It is a cross-sectional view schematically showing the shape of the lancet assembly when it is being withdrawn from the syringe during the loading process (the moment when the protruding rear end of the lancet body engages with the front end of the plunger). Figure 19CIt is a cross-sectional view schematically showing the shape of the lancet assembly at the end of its withdrawal from the syringe, during the loading process (the moment when the protruding rear end of the lancet body engages with the front end of the plunger).

[0206] As described above, in the normal mode, after the lancet assembly 100 is loaded into the syringe 200 according to step 1, the puncture component 133 is ejected to the outside according to step 2. However, due to different circumstances, such as... Figures 19A-19C As shown, considering that at the moment when the protruding rear end of the lancet body engages with the front end of the push rod during step 1, the lancet assembly 100 is inadvertently pulled out of the syringe.

[0207] In this regard, at the moment of engagement during loading (the moment when the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203), such as Figure 19A As shown, the front end of the trigger lever 205 is temporarily lifted away from the outer side of the push rod 203 by the protruding portion 206a1 of the push portion 206a located in the main part of the pusher 206.

[0208] In this regard, if the lancet assembly 100 is pulled outward (in the puncture direction / forward direction) during loading (at the moment when the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203), the rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203, thereby causing the push rod 203 to move forward as well. As described above, the pusher extension 206b, which is a component of the pusher, has a region for receiving the push rod 203 extending in the puncture direction (see reference). Figure 8A and Figure 8B As the pusher accommodates the push rod 203, the pusher can also move forward as the push rod 203 moves forward.

[0209] Therefore, as Figure 19B As shown, the protruding portion 206a1 of the ejector main portion 206a is not located directly below the front end of the trigger rod 205. Therefore, the front end of the trigger rod 205 contacts the outer surface of the push rod 203 and is positioned in front of the protrusion 203c provided on the outer surface of the push rod 203. As a result, the front end of the trigger rod 205 and the protrusion 203c can lock into each other, thereby suppressing the forward movement of the push rod 203, which is locked into the lancet body 131, even if the lancet body 131 moves forward.

[0210] If the lancet assembly 100 is pulled outward (in the puncture direction / forward direction) during the loading process, the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203, which is suppressed from moving in the puncture direction as described above, so the lancet body 131 itself does not move forward.

[0211] The aforementioned mid-loading moment is the moment when the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203. Therefore, the internal state of the lancet assembly 100 actually becomes... Figure 9B As shown, when viewed from above, the protrusion 125 on the outer side 121 of the lancet engaging member 120 is positioned in front of the protrusion 117 on the inner surface of the lancet housing 110. With this configuration, even if the lancet assembly 100 is pulled outwards (in the puncture direction / forward direction) during the loading process, and the lancet housing 110 moves forward, the protrusion 117 of the lancet housing 110 can engage with the protrusion 125 of the lancet engaging member 120. Therefore, the lancet housing 110 and the lancet engaging member 120 become an integral unit, allowing them to move together in the forward direction.

[0212] Furthermore, if the aforementioned lancet body 131 does not move forward, and the lancet housing 110 and lancet engaging component 120 move together in the forward direction, then as with... Figure 17E and Figure 17F As shown, the lancet body 131 moves backward relative to the lancet engaging member 120. Once this backward movement ends, the protrusion 131b formed on the upper surface of the lancet body 131 abuts against the recessed portion 120c (viewed from above) of the lancet engaging member 120. Thus, the recessed portion 120c (viewed from above) of the lancet engaging member 120 can accommodate the recessed portion of the lancet body 131, preventing further backward movement of the lancet body 131.

[0213] Furthermore, if the main body 131 of the lancet itself does not move forward, but the lancet housing 110 and the lancet engaging component 120 begin to move together in the forward direction, then as with... Figure 17E and Figure 17F As shown in the diagram, the flexible wing 131d of the lancet body 131 extends beyond the protrusion 129 located behind the inner side of the side portion 121 of the lancet engaging member 120, and once it extends beyond the protrusion 129, the flexible wing 131d engages with the protrusion 129. This effectively suppresses movement of the lancet body 131 in the puncture direction (i.e., the forward direction).

[0214] Based on the above, even if the lancet assembly 100 is accidentally pulled outward during the loading process (when the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203), the forward and backward movement of the lancet body 131, on which the exposed puncture component 133 of the front end 133a is mounted, can be appropriately prevented.

[0215] Furthermore, as described above, if the lancet assembly 100 is pulled outward (in the puncture 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 become mutually locked.

[0216] Furthermore, when loading the lancet assembly 100 into the syringe 200, the flexible locking portion 127 (see reference 127) positioned behind the side 121 of the lancet engaging member 120 is engaged by the lancet assembly receiving member 204. Figure 9B The protrusion 128 is temporarily bent inward. As a result, the locking of the protrusion 128 with the gap provided on the inner side of the lancet housing 110 is temporarily released. However, if the lancet assembly 100 is pulled out during loading (at the moment when the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203), the flexible locking part 127 of the lancet engaging member 120, which is temporarily bent inward, is opened, and thus can be locked again with the gap provided on the inner side of the lancet housing 110.

[0217] As a result, even if the lancet assembly 100 is pulled outward during loading, it is possible to achieve (1) the locking of the protrusion 125 of the lancet engaging member 120 with the protrusion 117 of the lancet housing 110, and (2) the locking of the flexible locking portion 127 of the lancet engaging member 120 with the gap provided on the inner side of the lancet housing 110. Therefore, it is possible to appropriately prevent both forward and backward movement of the lancet engaging member 120 within the lancet housing 110.

[0218] Based on the above, even if the lancet assembly 100 is accidentally pulled outward during the loading process (when the protruding rear end 131a of the lancet body 131 engages with the front end 203a of the push rod 203), it is possible to properly prevent either the lancet engaging component 120 or the lancet body 131 with the exposed puncture component 133 at the front end 133a attached from the lancet housing 110 from falling off.

[0219] 3. The bloodletting needle assembly 100 is refilled into the syringe 200 after the completion of the above-mentioned step 5.

[0220] Figure 20A It is a schematic cross-sectional view showing the configuration of the lancet assembly, which has temporarily stopped being discharged, as it begins to reload into the syringe. Figure 20B It is a schematic cross-sectional view showing the shape of the lancet assembly during reloading into the syringe after the discharge has been temporarily stopped. Figure 20C It is a schematic cross-sectional view showing the shape of the lancet assembly at the end of reloading into the syringe after the temporary termination of discharge.

[0221] As described above, in normal operation, the lancet assembly 100 is typically disposed of by ejecting it from the syringe 200 and then discarding it, following step 5 described above. However, depending on the circumstances, such as... Figures 20A to 20C As shown, this would lead to the puncture needle assembly 100 being incorrectly refilled into the syringe 200 after the above-mentioned step 5 is completed.

[0222] In this regard, if the reloading of the bloodletting needle assembly 100 into the syringe 200 is mistakenly started after the completion of the above-mentioned step 5 (refer to...), Figure 20A Then, the rear end 131a of the bloodletting needle body 131 engages with the front end 203a of the push rod 203 (refer to...). Figure 20B When the needle engages, the needle assembly receiving component 204 exerts a force on the needle engaging component 120 in the forward direction, i.e., the puncture direction.

[0223] Furthermore, once loading is complete, the protrusion 204a of the lancet assembly receiving member 204 engages with the recess 111 provided on the outer surface of the lancet housing 110. This allows the inserted lancet housing 110 to be held and fixed to the syringe 200 (see reference). Figure 20C ).

[0224] Here, in this method, the temporarily discharged bloodletting needle assembly 100, which was completed after step 5 above, is reloaded into the syringe 200. Therefore, as with Figure 17E and Figure 17F As shown, the flexible wing 131d of the lancet body 131 can be kept locked to the protrusion 129 of the lancet engaging member 120. Therefore, it is possible to maintain a state that prevents the lancet body 131 from moving in the puncture direction (i.e., the forward direction).

[0225] Based on the above, even assuming that after the reloading of the lancet assembly 100, which has temporarily stopped discharging, is completed, and the user or a third party mistakenly presses the trigger lever 205 again, the force exerted on the lancet body 131 by the push rod 203 connected to the compressed firing pin spring will move it in the forward direction, achieving the following effect. Specifically, as described above, by maintaining the locking state between the flexible wing 131d and the protrusion 129 of the lancet engaging member 120, the ejection of the front end 133a of the piercing member 133 provided on the lancet body 131 to the outside can be appropriately prevented.

[0226] Furthermore, assuming that even if the force of further expulsion is applied relative to the lancet assembly 100 after reloading, it is still related to... Figure 17E and Figure 17F Similarly, in the configuration shown, the flexible wing 131d is engaged with the protrusion 129 of the lancet engaging member 120, which effectively prevents the front end 133a of the puncture member 133 located on the lancet body 131 from being ejected outward. Furthermore, during the initial ejection of the lancet assembly 100, since the flexible locking portion 126 of the lancet engaging member 120 is 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.

[0227] 4. At the midpoint of step 1 above (the moment when the protruding rear end of the lancet body engages with the front end of the push rod), the lancet assembly 100, after being pulled outwards, is reloaded into the syringe 200.

[0228] Figure 21A It is a schematic representation of... Figure 19C The diagram shows a cross-sectional view of the lancet assembly after it has been withdrawn from the syringe during loading, and its state at the start of reloading. Figure 21B It is a schematic representation of... Figure 19C The diagram shows a cross-sectional view of the lancet assembly during reloading of the syringe after it has been withdrawn from the syringe during the filling process. Figure 21C It is a schematic representation of... Figure 19C The diagram shows a cross-sectional view of the lancet assembly after it has been withdrawn from the syringe during loading, and its shape at the end of reloading.

[0229] As described above, in the normal mode, after the lancet assembly 100 is loaded into the syringe 200 according to step 1, the puncture component 133 is ejected to the outside according to step 2. However, due to different circumstances, considering that at a certain moment during step 1 (the moment when the protruding rear end of the lancet body engages with the front end of the push rod), the lancet assembly 100 may be inadvertently pulled out of the syringe, resulting in... Figures 21A to 21C The needle assembly 100, after being pulled out, is refilled into the syringe 200.

[0230] In this regard, if the reloading of the lancet assembly 100, which was mistakenly withdrawn midway, is started (see...). Figure 21A Then, the rear end 131a of the bloodletting needle body 131 engages with the front end 203a of the push rod 203 (refer to...). Figure 21B When the needle engages, the needle assembly receiving component 204 exerts a force on the needle engaging component 120 in the forward direction, i.e., the puncture direction.

[0231] Furthermore, once the reloading is complete, the protrusion 204a of the lancet assembly receiving member 204 engages with the recess 111 provided on the outer surface of the lancet housing 110. This allows the inserted lancet housing 110 to be held securely in place on the syringe 200 (see reference). Figure 21C ).

[0232] Here, in this method, the lancet assembly 100, which was withdrawn midway, is reloaded into the syringe 200. Therefore, as with Figure 17E and Figure 17F As shown, the flexible wing 131d of the lancet body 131 can be kept locked to the protrusion 129 of the lancet engaging member 120. Therefore, it is possible to maintain a state that prevents the lancet body 131 from moving in the puncture direction (i.e., the forward direction).

[0233] Based on the above, even assuming that after the reloading of the lancet assembly 100, which has temporarily stopped discharging, is completed, and the user or a third party mistakenly presses the trigger lever 205 again, the force exerted on the lancet body 131 by the push rod 203 connected to the compressed firing pin spring will move it in the forward direction, achieving the following effect. Specifically, as described above, by maintaining the locking state between the flexible wing 131d and the protrusion 129 of the lancet engaging member 120, the ejection of the front end 133a of the piercing member 133 provided on the lancet body 131 to the outside can be appropriately prevented.

[0234] In addition, such as Figure 21B and Figure 21CAs shown, the lancet engaging component 120 moves forward in the puncture direction before reloading is completed. During this forward movement, the flexible locking portion 126, viewed from above, passes over the protrusion 117 provided on the inner surface of the lancet housing 110. Once it passes over the protrusion 117, the flexible locking portion 126 can engage with the protrusion 117 of the lancet housing 110. Thus, the backward movement of the lancet engaging component 120 within the lancet housing 110 can be suppressed at the end of reloading.

[0235] Furthermore, assuming that even if the force of further expulsion is applied relative to the lancet assembly 100 after reloading, it is still related to... Figure 17E and Figure 17F Similarly, in the configuration shown, the flexible wing 131d is engaged with the protrusion 129 of the lancet engaging member 120, which effectively prevents the front end 133a of the puncture member 133 located on the lancet body 131 from being ejected outward. Furthermore, at the end of reloading, the flexible locking portion 126 of the lancet engaging member 120 is engaged with the protrusion 117 of the lancet housing 110, thus preventing the lancet engaging member 120 from detaching from the lancet housing 110.

[0236] The embodiments of the present invention have been described above, but the present invention is not limited thereto, and those skilled in the art will readily understand that various changes can be made.

[0237] Industrial applications

[0238] Using a puncture device consisting of a lancet assembly and a syringe as described above allows for simpler and safer blood collection. Therefore, this puncture device is not limited to blood collection from diabetic patients and can be used for various purposes requiring blood collection.

[0239] Explanation of reference numerals in the attached figures

[0240] 100…A lancet assembly; 110…A lancet housing; 111…A recess formed on the outer surface of the lancet housing; 112…An extension formed inside the lancet housing; 112a…A protruding portion of the extension; 112b…The end of the extension; 112c…A designated portion of the extension; 113…An inclined portion formed inside the lancet housing; 114…The internal space of the lancet housing; 115…The rear end of the opening of the lancet housing; 116…The puncture opening of the lancet housing; 117…A protrusion formed on the inner surface of the lancet housing; 118…An exposed opening of the lancet housing for the front end of the lancet engaging component to be exposed; 120…The lancet engaging component; 120a…The rear end of the lancet engaging component; 12 120b…The front end of the bloodletting needle engaging component; 120c…The recessed portion of the bloodletting needle engaging component (viewed from above); 121…The side portion of the bloodletting needle engaging component; 123…The curved portion provided on the back side of the bloodletting needle engaging component; 124…The recessed portion of the bloodletting needle engaging component; 125…The protrusion of the bloodletting needle engaging component; 126…The flexible locking portion of the bloodletting needle engaging component; 127…The flexible locking portion of the bloodletting needle engaging component; 128…The protrusion provided in the flexible locking portion; 129…The protrusion formed on the inner side of the side portion of the bloodletting needle engaging component; 130…The bloodletting needle; 131…The bloodletting needle body; 131a…The protruding rear end of the bloodletting needle body; 131b…The protrusion formed on the main surface (upper surface) of the bloodletting needle body. 131c…side of the lancet body; 131d…flexible wing of the lancet body; 131e…dam formed on the back side of the lancet body; 132…lancet cap; 132a…main part of the lancet cap; 132b…main part of the lancet cap; 133…puncture component; 133a…front end of the puncture component; 134…connecting component; 200…syringe; 201…shell; 202…sub-part; 202a…one end of the sub-part; 202b…the other end of the sub-part; 203…push rod; 203a…front end of the push rod; 203b…protrusion of the push rod; 203c…protrusion of the push rod; 204…lancet assembly receiving component; 204a…lancet assembly receiving part 205…A protrusion of the component; 206…A trigger lever; 206…The main part of the ejector; 206a…The ejection portion of the main part of the ejector; 206a1…The protruding portion located in the ejection portion; 206b…The ejector extension portion of the main part of the ejector; 207…The ejector knob; 208…A firing pin spring (ejection spring); 209…The return spring; 210…The adjusting ring; 211…The adjusting spring; 212…The indicator; 213…The dial; 214a…The restraining component; 214b…The restraining component; 215…The pin; 215a…One end of the pin; 215b…The other end of the pin; 216…The locking component; 217…The ejector; 217a…The front end of the ejector; 218…The hole formed in the sub-part; 219…The adjuster (puncture depth adjustment component);300… puncture equipment.

Claims

1. A syringe capable of loading a lancet assembly, The syringe is characterized in that, It is configured to have a casing, which is composed of at least two sub-parts that are separable from each other and extend along the puncture direction. Each sub-part in a direction different from the puncture direction has one end secured to the other and the other end secured to each other by a restraining component. A locking member is provided at the outer edge of one sub-part of the housing, and a locked member capable of locking with the locking member is provided at the outer edge of the other sub-part. The outer edges of both sub-parts have holes, allowing one end of a pin to be inserted into the hole in the one sub-part and the other end of the pin to be inserted into the hole in the other sub-part. The bloodletting needle assembly includes a puncture component. The syringe is configured to have an ejector for discharging the loaded lancet assembly from the syringe after a puncture using the puncture component has been completed. The ejector is configured to have an ejector main body and an ejector knob. The ejector knob can be rotated independently of the ejector main body.

2. The syringe according to claim 1, characterized in that, The outer edges of one adjacent sub-part in the puncture direction can be connected to the outer edges of another sub-part.

3. The syringe according to claim 1 or 2, characterized in that, The restraining component is a ring-shaped component.

Images