JP2006095268A - Lancet with needle protector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lancet with a needle protector which prevents a needle from being exposed from a puncture instrument before and after puncturing and can remarkably reduce the risk of erroneous puncturing compared to conventional lancets. <P>SOLUTION: A lancet with a needle protector includes a needle, a lancet hub for supporting the needle so that the needlepoint can be exposed, a cylindrical needle protector fit on the distal end portion of the lancet hub so as to be capable of axial movement; and a resilient member connecting the needle protector and the lancet hub. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lancet for puncturing the surface of a living body with a puncture needle and collecting a necessary amount of body fluid, for example, when examining a body fluid such as blood or interstitial fluid.

  In general, specimens of body fluids such as blood and interstitial fluid are required for various medical purposes. As an important example, for example, many diabetics must monitor blood glucose levels periodically to determine when an insulin injection is needed.

  In order to monitor the blood glucose level, it is typically effective for the patient himself to obtain a blood sample by puncturing the skin, and subjecting the obtained blood sample to blood glucose level analysis using a simple measuring device. In many cases, in order to obtain a desired blood sample, a small amount of blood is exuded on the surface of a living body such as a fingertip using a puncture device equipped with a needle, and this is collected.

  Various types of such puncture devices have been conventionally devised. Generally, the puncture device main body 1051 as shown in FIG. 12A (see, for example, Patent Documents 1-4) has a tip as shown in FIG. A lancet 1001 (see, for example, Patent Documents 5 and 6) is attached, and a cap 1060 shown in FIG. In the drawings, the lancet with a needle protector will be referred to as “tip” or “front” on the upper side, “rear end” or “rear” on the lower side, and “axial direction” on the lower side. In the following description, the axis side is “inside” and the outside side is “outside”.

  In FIG. 11, the lancet 1001 is configured by, for example, a prismatic lancent hub 1016 having a sharp tip 1014 fixed in the axial direction, covering the needle tip 1012 and covering the needle tip protection member 1010. The needle tip protection member 1010 is fitted on the needle tip 1012 in order to protect the user or the like from being accidentally damaged.

  In FIG. 12A, the puncture device main body 1051 has a cock 1058 disposed in a cylindrical casing 1056 so as to be capable of reciprocating in the axial direction, and unlocks the cock 1058 in the locked state. Trigger button 1054 is provided on the side. The casing 1056 includes a lancet carrier 1052 having an opening at the tip, and the lancet 1001 can be detachably held by fitting the rear end portion of the lancet 1001 into the opening (see FIG. 12B).

  The puncture device body 1051 having such a configuration can retract the cock 1058 while compressing a coil spring (not shown) built in the puncture device body 1051 by pulling the cock 1058 toward the rear end. The retracted cock 1058 is locked at the retracted position by a locking mechanism (not shown) interlocked with the trigger button 1054. When the trigger button 1054 is pushed, the locked state of the cock 1058 is released, and the cock 1058 is urged toward the distal end of the casing 1056 by the elastic repulsion of the compressed coil spring and moves forward. The forward movement of the cock 1058 causes the needle tip 1012 of the lancet 1001 held at the tip of the lancet carrier 1052 to slightly protrude through the opening at the tip of the cap 1060 shown in FIG. . Thereafter, the cock 1058 is retracted toward the rear end by using the force of the extended coil spring to return to the natural length.

  In the puncture device 1050 described above, the lancet 1001 is attached to the lancet carrier 1052 of the puncture device body 1051 before puncturing (FIG. 12B), and the needle tip protection member 1010 that protects the needle tip 1012 of the lancet 1001 is twisted off. Then, the cap 1060 of the puncture device 1050 is attached (FIG. 12C). After the puncture is completed, the cap 1060 is removed from the puncture device 1050, and the lancet 1001 is removed from the puncture device body 1051 and discarded. In order to avoid infection via the lancet 1001 to which blood has adhered, the lancet 1001 is replaced every time a puncture is performed and discarded after use.

  However, in these conventional puncture devices 1050, when the needle tip protection member 1010 is twisted, the sharp needle tip 1012 of the lancet 1001 is exposed as shown in FIG. Therefore, when the cap 1060 of the puncture device 1050 is subsequently attached, the fingertip or the like may be accidentally damaged.

  There is also a similar risk when removing the cap from the puncture device after use. Furthermore, when a nurse or the like punctures a patient in a ward, an erroneous puncture after use creates a risk of infection with HIV, hepatitis B virus, and the like, and involves a very large risk.

  In order to avoid such a risk, a puncture device has been devised in which the needle tip is not exposed except during puncture.

  For example, Document 7 discloses a lancet including a reusable base unit and a disposable tip cap. The disposable tip cap can accommodate the lancet inside the lancet before and after use. Therefore, the tip cap can be discarded without risk of contacting the used lancet with the finger of the user or the like. That is, the needle tip is protected by the cap before using the lancet, and the tip cap is discarded after the lancet is used, which is safe. However, since the lancet is discarded together with the cap, the cost burden is large for patients who need blood collection on a daily basis.

JP 59-160441 A Japanese Patent Laid-Open No. 03-141929 JP 2000-237172 A Japanese translation of PCT publication No. 2003-511184 US Pat. No. 3,358,689 Japanese Utility Model Publication No. 06-023505 Japanese Patent Laid-Open No. 03-30757

  Therefore, as a result of diligent studies to solve the above-mentioned problems, the present inventor has devised a lancet that prevents exposure of the needle tip and is inexpensive and easy to handle, and has led to the present invention.

  That is, an object of the present invention is to provide a lancet with a needle protector that prevents the needle from being exposed from the puncture device before and after puncturing, and can greatly reduce the risk of erroneous puncturing.

  Another object of the present invention is to provide an easy-to-handle lancet with a needle protector that is inexpensively produced and can be used for a commercially available general-purpose puncture device.

  The lancet with a needle protector of the present invention is extrapolated so that the needle, the lancet hub that supports the needle so that the needle tip can be exposed, and the tip of the lancet hub can be moved in the axial direction. A cylindrical needle protector, and an elastic body connecting the needle protector and the lancet hub are provided.

  The lancet with a needle protector of the present invention is extrapolated so that the needle, the lancet hub that supports the needle so that the needle tip can be exposed, and the tip of the lancet hub can be moved in the axial direction. A cylindrical needle protector, a needle protector support that accommodates a rear end portion of the lancet hub, and an elastic body that connects the needle protector and the needle protector support.

  In the lancet with a needle protector of the present invention, it is preferable that the elastic body is a band-shaped elastic body.

  In the lancet with a needle protector of the present invention, the elastic body may be a coiled spring.

  The lancet with a needle protector of the present invention may have a needle tip protecting member that protects the needle tip of the needle.

  In the lancet with a needle protector of the present invention, it is preferable that the needle tip protecting member and the lancet hub are formed integrally.

  In the lancet with a needle protector of the present invention, the needle tip protecting member and the needle protector may be integrally formed.

  In the lancet with a needle protector according to the present invention, the needle protection member may include an inner protrusion that can protect the needle tip and an outer protrusion that is disposed on the outer peripheral surface of the needle protector.

  The lancet with a needle protector according to the present invention comprises a locking means formed on a side surface of the tip of the lancet hub, and a locked means formed on a rear end of the needle protector and capable of locking the locking means. It is characterized by having. For this reason, the movement of the needle protector and the lancet hub can be regulated after puncturing.

  In the lancet with a needle protector of the present invention, the needle protector can surround the needle beyond the needle tip even when the needle tip protection member is twisted off. Therefore, since the needle protector protects the needle tip except during puncturing, the risk of erroneous puncturing can be greatly reduced compared to the prior art.

  Moreover, the lancet with a needle protector of the present invention can integrally form a lancet hub, a needle tip protecting member and a needle using a mold. On the other hand, the needle protector, the elastic body, and the needle protector support portion can also be integrally formed using a mold. Since the lancet with a needle protector of the present invention can be formed by fitting these two integrally molded parts, it can be produced at a sufficiently low cost. Moreover, it can be used for a conventional commercially available general-purpose puncture tool without replacing the puncture tool, and is economical.

  The lancet with a needle protector of the present invention has a configuration in which the needle protector and the needle protector support are connected by a curved elastic body. Moreover, the latching means which protruded inside was formed in the rear-end part of the needle protector, and the latching means was provided in the side surface near the front-end | tip part of a lancet hub. Therefore, the lancet hub is not locked to the needle protector under normal conditions, but after the puncture is completed, the elastic body is restrained from the outside toward the central axis, the curved elastic body is stretched, and the needle protector connected to the elastic body is attached to the lancet. When the fixed distance is moved in the distal direction, the locked means is locked to the locking means. As a result, the movement of the needle protector 2 in the rear end direction is suppressed thereafter, and the needle tip of the needle is held in the needle protector, so that the lancet with the needle protector of the present invention can be safely discarded and is not easily reused. can do.

  Furthermore, the lancet with a needle protector according to the present invention can be easily attached to and detached from the puncture device in the same manner as a conventional commercially available lancet. Moreover, unlike the conventional lancet, the needle tip is not exposed, so it can be handled with peace of mind.

  The lancet with a needle protector according to the first embodiment of the present invention includes a needle 14 and a needle 14 as shown in FIG. 1 (a) and FIGS. 1 (b) and 1 (c) which are sectional views thereof. A lancet hub 16 that supports the needle tip 12 so as to be exposed, a tubular needle protector 2 that is externally attached to the tip of the lancet hub 16 so as to be movable in the axial direction, and a rear of the lancet hub 16 It comprises a needle protector support portion 4 that accommodates the end portion, and an elastic body 3 a that connects the needle protector 2 and the needle protector support portion 4. Alternatively, like the lancet 401 with a needle protector of the embodiment shown in FIG. 2 (a) and its cross-sectional views, FIG. 2 (b) and FIG. 2 (c), the elastic body 3a is omitted by omitting the needle protector support portion 4. The needle protector 2 and the lancet hub 16 may be connected. A lancet 1 with a needle protector having the configuration shown in FIG. 1 will be described below. As described above, in the drawing, the upper side is “tip” or “front”, the lower side is “rear end” or “rear”, and the vertical direction is “axial direction”, and the shaft of the lancet with a needle protector is used. The side is “inside” or “inside” and the outside is “outside” or “outside”.

  The lancet hub 16 fixes the needle 14 to the central axis, and protects the needle tip 12 by covering the tip with a needle tip protection member 10. Needle tip protection member 10 may be a detachable cap and may be a separate cap from lancet hub 16, but is preferably integrally formed with lancet hub 16. In the case of integral molding, the rupture portion 5 is formed thinly between the needle tip protection member 10 and the lancet hub 16, and the needle tip protection member 10 is twisted, for example, to break the rupture portion 5 and separate from the lancet hub 16. That's fine.

  Locked means 7 that protrudes inward is formed at the rear end of the needle protector 2, and can be locked to the lock means 6 that protrudes outward on the side surface near the tip of the lancet hub 16.

  The curved elastic body 3a as shown in FIG. 1 (a) is desirably flexible so as to minimize deceleration of the puncture speed at the time of puncture, while it needs to have strength that can hold the needle protector 2. It is. Therefore, it is desirable that the elastic body 3a be molded from a thermoplastic resin such as polypropylene, polyethylene, polystyrene, or polyacetal. In addition, it is more preferable to integrally form the needle protector 2, the elastic body 3a, and the needle protector support portion 4 from the viewpoints of cost and assembly.

  In this embodiment, the shape of the elastic body 3a is not particularly limited. However, as shown in FIGS. 1 (a) and 1 (b), the elastic body 3a may have an elongated strip-shaped leaf spring shape. The elastic body 3a need not be arc-shaped, and may be polygonal, for example. Or in order to make the said softness | flexibility and intensity | strength compatible, as shown in FIG. 3, you may make it the shape which provides a flexible part by making a part of elastic body 3a thin. The elastic body 3a is connected to the needle protector 2 so that the needle protector 2 is movably attached to the tip of the lancet hub 16, but the rear end is similar to the lancet 401 with the needle protector. It may be directly connected to the lancet hub 16 or may be connected to a needle protector support 4 that accommodates and fixes the rear end of the lancet hub 16 like the lancet 1 with a needle protector.

  As described above, in the lancet 1 with the needle protector of the present embodiment, the needle protector support portion 4 connected to the needle protector 2 by the elastic body 3a accommodates and fixes the lancet hub 16. The shape of the bottom surface of the needle protector support 4 is not particularly limited, and may be a circle, a polygon, or the like as long as it is fixed to a lancet carrier of a commercially available puncture device.

  The elastic body 3a is long enough that the needle tip 12 is exposed when the needle protector 2 is moved to the rearmost end and the needle protector 2 does not fall out from the lancet hub 16 to the front end side when the needle protector 2 is moved to the most distal end. The thickness and elastic force are set.

  In the lancet 1 with a needle protector of the present invention configured as described above, the needle protector 2 surrounds the needle 14 beyond the needle tip 12 even when the needle tip protection member 10 is twisted off, and other than when puncturing Since the needle protector 2 protects the needle tip 12, the risk of erroneous puncture can be greatly reduced.

  Next, the preferable manufacturing method of the lancet 1 with a needle protector of 1st Embodiment which concerns on this invention is demonstrated.

  As described above, it is preferable that the lancet hub 16, the needle tip protecting member 10, and the needle 14 are integrally molded by preparing, for example, a mold in which these external shapes are formed in advance. First, a needle 14 formed of a metal such as stainless steel or synthetic resin is fixed in the axial direction at the center of the mold. At this time, the needle tip 12 is fixed so as to be in the distal direction. Next, a thermoplastic resin such as polyethylene or polypropylene that has become fluid at high temperature is poured into the mold. When the inside of the mold is sufficiently hardened by cooling, the mold is removed and the integrally formed lancet hub 16, needle 14 and needle tip protecting member 10 are taken out. The molding material of the lancet hub 16 and the needle tip protection member 10 is preferably a thermoplastic resin, but is not particularly limited.

  Similarly, the needle protector 2, the elastic body 3a, and the needle protector support portion 4 are also integrally formed using a mold prepared in advance. The molding material is as described above.

  Finally, the rear end side of the integrally formed lancet hub 16, the needle 14 and the lancet hub 16 of the needle tip protecting member 10 are arranged on the distal end side of the needle protector 2 of the integrally formed needle protector 2, the elastic body 3 a and the needle protector support 4. Insert from. The locking means 6 formed on the side surface of the front end of the lancet hub 16 does not lock the locked means 7 protruding inwardly at the rear end of the needle protector 2, and the needle tip 12 of the needle 14 is the needle protector 2. After the insertion to the position accommodated therein, the rear end portion of the lancet hub 16 is fixed in the needle protector support portion 4, and the lancet 1 with the needle protector of the first embodiment according to the present invention is completed.

  As described above, the lancet 1 with the needle protector of the present invention integrally forms the lancet hub 16, the needle tip protecting member 10 and the needle 14 using a mold, while the needle protector 2, the elastic body 3 a and the needle protector support 4. Also, it can be formed by integrally molding using a mold and fitting them together. Therefore, the lancet 1 with a needle protector of the present invention can be produced at a relatively low cost. Moreover, it can be used also for the conventional commercially available general-purpose puncture tools without replacing the puncture tools 51 and 1051, and it is economical.

  Hereinafter, the operation of the lancet 1 with a needle protector when the lancet 1 with a needle protector of the present embodiment is attached to the puncture device 50 shown in FIGS. 4 (a) and 4 (b) will be described. FIG. 4B is a cross-sectional view when the lancet 1 with a needle protector of the present embodiment is attached to the puncture device 50 of FIG. Since the puncture device 50 is a known puncture device that is commercially available in the same manner as the puncture device 1050, the configuration and function thereof will be described briefly in the following description.

  First, as preparation for puncturing, the cap 60 is removed from the puncture device 50 as shown in FIG. 5A, and the lancet 1 is attached to the lancet carrier 52 as shown in FIG. 5B. Thereafter, as shown in FIG. 5C, the needle tip protecting member 10 is twisted off from the lancet 1.

  The needle tip protection member 10 is formed integrally with the lancet hub 16 as described above. However, since the fracture portion 5 is formed thin, the needle tip protection member 10 is broken by twisting the needle tip protection member 10. Torn apart. At this time, since the needle tip 12 of the needle 14 is surrounded by the needle protector 2, the needle tip 12 is exposed as can be seen in comparison with FIGS. 13 (a) to 13 (c) showing the preparation procedure of the conventional example. There is no risk of accidental puncture.

  Next, the state at the time of puncture is demonstrated below using FIG. 6 (a)-FIG.6 (e).

  The cap 60 is attached to the puncture device main body 51 as shown in FIG.

  As shown in FIG. 6B, when the cock 58 is pulled and the lancet firing spring 62 in the puncture device 50 is compressed, the lancet carrier 52 to which the lancet 1 is attached is retracted, and the puncture preparation shown in FIG. State (locking state).

  Next, as shown in FIG. 6D, when the trigger button 54 is pressed, the compression of the lancet firing spring 62 is released, and the lancet 1 moves forward together with the lancet carrier 52 in the forward direction. At that time, the forward movement of the needle protector 2 is stopped by the needle protector 2 coming into contact with the inner surface of the cap 60. However, since the lancet hub 5 can move inside the needle protector 2, the needle tip 12 of the needle 14 jumps out from the front end opening 64 of the cap 60 because the needle protector 2 moves forward in the distal direction even after the needle protector 2 advances and stops. At this time, puncture of the living body surface is performed.

  Thereafter, the lancet carrier 52 returns to the initial position (FIG. 6A) together with the lancet 1 as shown in FIG.

  In order to remove the lancet 1, first, the cap 60 is removed from the puncture device 50 as shown in FIG. Also at this time, since the needle protector 2 protects the needle tip 12 of the needle 14, the needle tip 12 is not exposed and there is no risk of erroneous puncture.

  Next, as shown in FIG. 7B, the elastic body 3 a is held from the outside toward the central axis, the curved elastic body 3 a is extended, and the needle protector 2 is moved toward the distal end of the lancet 1. When the needle protector 2 moves in the axial direction by a predetermined distance, the locked means 7 is locked by the locking means 6, and hence the movement in the rear end direction of the needle protector 2 is suppressed thereafter. For this reason, the needle tip 12 of the needle 14 is held in the needle protector 2, and the lancet 1 can be safely discarded and is difficult to reuse.

  As described above, the lancet 1 with a needle protector of the present invention can be easily attached to and detached from the puncture tool 50 in the same manner as a conventional commercially available lancet. Further, even when the needle tip protection member 10 is twisted, the needle protector support portion 4 can surround the needle 14 beyond the needle tip 12. Since the needle protector 2 protects the needle tip 12 except during puncturing, the risk of erroneous puncturing can be greatly reduced as compared to the conventional lancet.

  In the lancet 1 with a needle protector of the present invention, the lancet hub 16, the needle tip protecting member 10, and the needle 12 can be integrally formed using a mold. On the other hand, the needle protector 2, the elastic body 3a, and the needle protector support part 4 can also be integrally formed using a mold. Since the lancet 1 with a needle protector of the present invention can be formed by fitting these two integrally formed parts, it can be produced at a relatively low cost. Moreover, it can be used for a conventional commercially available general-purpose puncture tool without replacing the puncture tool, and is economical.

  Furthermore, the lancet 1 with a needle protector of the present invention is configured to connect the needle protector 2 and the needle protector support 4 with a curved elastic body 3a as shown in FIG. Further, the locking means 7 projecting inwardly is formed at the rear end of the needle protector 2 and the locking means 6 is provided on the side surface near the tip of the lancet hub. When the needle protector 2 that is restrained from the outside toward the shaft and extends the curved elastic body 3 a and is connected to the elastic body 3 a is moved a certain distance in the distal direction of the lancet 1, the locked means 7 is connected to the lancet hub 16. Locked to the locking means 6. Accordingly, the movement of the needle protector 2 in the rear end direction is suppressed thereafter, and the needle tip 12 of the needle 14 is held in the needle protector 2, so that the lancet 1 with the needle protector of the present invention can be safely discarded and reused. Can be difficult.

  As mentioned above, although embodiment of this invention was described, the lancet with a needle protector which concerns on this invention is not limited to the said embodiment. In the lancet with a needle protector of the above embodiment, the elastic body is a curved elastic body in the above embodiment, but is interposed between the needle protector 2 and the needle protector support 4 as shown in FIGS. The coil spring 3b that circulates around the lancet hub 16 may be used. Other configurations, functions, manufacturing methods, materials, and the like of the lancet 101 with the needle protector may be the same as the lancet 1 with the needle protector of the above embodiment. In addition, in the following description, the same code | symbol shall be attached | subjected to the component similar to the lancet 1 with a needle protector of the said embodiment.

  Accordingly, the lancet 101 with the needle protector of the present invention, like the lancet 1 with the needle protector, protects the needle tip 12 except when puncturing, so that the risk of erroneous puncture can be greatly reduced compared to the prior art. It is easy to handle and safe. Further, the lancet 101 with a needle protector of the present invention can be formed by fitting two integrally molded parts, so that it can be produced at a relatively low cost, and can be mounted on a conventional commercially available puncture device. Is.

  Moreover, since the lancet 101 with a needle protector is provided with the locking means 6 and the locked means 7 and restricts the movement of the lancet hub 16, it can be safely discarded after puncturing and difficult to reuse. Unlike the lancet 1 with the needle protector, the lancet 101 with the needle protector is moved to the distal end side of the lancet hub 16 by directly holding the needle protector 2 after the lancet 101 is used, and is locked with the locked means 7. The means 6 is engaged and discarded.

  Further, the lancet with a needle protector of the present invention may be 3c whose elastic body is bellows as shown in FIGS. 9 (a) and 9 (b). Other configurations, functions, manufacturing methods, materials, and the like of the lancet 201 with a needle protector may be the same as the lancet 1 with a needle protector of the above embodiment.

  Therefore, also in this embodiment, the lancet 201 with the needle protector is similar to the lancet 1 with the needle protector, and the needle protector 2 protects the needle tip 12 at the time of puncture, and the risk of erroneous puncture is significantly greater than the conventional lancet. It can be reduced, easy to handle and safe. In addition, the lancet 201 with a needle protector can be formed by fitting two integrally molded parts, so that it can be produced at a relatively low cost, and can be mounted on a conventional commercially available puncture device, which is economical. . Furthermore, since the lancet 201 with the needle protector is provided with the locking means 6 and the locked means 7 to restrict the movement of the lancet hub 16, the needle protector 2 is slid by pressing the convex portion of the bellows from the outside. After use, the locked means 7 and the locking means 6 can be engaged. Therefore, the lancet 201 with a needle protector of the present embodiment can be safely discarded after puncturing as well as the above embodiment, and can be made difficult to reuse.

  Alternatively, the lancet with a needle protector of the present invention may be a cylindrical rubber 3d whose elastic body is extendable as shown in FIGS. 10 (a) and 10 (b). In the lancet 301 with a needle protector, the lancet hub 16, the needle tip protecting member 10 and the needle 14 are integrally formed and fitted by a separately formed needle protector 2. Thereafter, the rubber 3d is fitted and connected to the lancet hub 16 and the needle protector 2 for puncturing. Other configurations, functions, manufacturing methods, materials, and the like may be the same as the lancet 1 with a needle protector of the above embodiment.

  Also in this embodiment, the lancet 301 with a needle protector is similar to the lancet 1 with a needle protector, and the needle protector 2 protects the needle tip 12 except during puncturing, thereby greatly reducing the risk of erroneous puncturing as compared to the conventional lancet. It is easy to handle and safe. Moreover, the lancet 301 with a needle protector can be produced relatively easily and can be mounted on a conventional commercially available puncture device, which is economical.

  Furthermore, the lancet 301 with a needle protector is provided with the locking means 6 and the locked means 7 to restrict the movement of the lancet hub 16. The needle protector 2 is slid by extending the rubber 3 d and is covered after use. The locking means 7 and the locking means 6 can be engaged. Therefore, the lancet 301 with a needle protector of the present embodiment can be disposed of safely after puncturing as well as the above embodiment and can be made difficult to reuse.

  As described above, in the lancet with a needle protector of the present invention, the elastic body 3 has an elongated strip-like leaf spring shape, a helical coil spring shape, a bellows shape, and other sizes and shapes that can be accommodated in the cap of the puncture device. If it is, it will not specifically limit, You may make it the shape which makes a part thin and provides a flexible part. Further, the elastic body 3 is desirably formed of, for example, a thermoplastic resin such as polypropylene, polyethylene, polystyrene, or polyacetal as described above. However, the elastic body 3 may be formed of rubber or may be formed to be stretchable. For example, the material is not particularly limited.

  Further, as shown in FIGS. 8 to 10, the needle tip protecting member 10 may be anything that can be gripped to protect the needle tip 12 and break the fracture portion 5, but is shown in FIGS. 1 and 2. As shown, the inner projecting portion 101 that can protect the needle tip 12 and the outer projecting portion 102 disposed on the outer peripheral surface of the needle protector 2 may be provided. The outer protrusion 102 is arranged on the outer peripheral surface of the needle protector 2 in a contact or non-contact state without pressing the needle protector 2 toward the proximal end. The outer protrusions 102 may be disposed on the outer peripheral surface of the needle protector 2 over the entire circumference, but one or more outer protrusions 102 are disposed on a part of the outer peripheral surface as shown in FIGS. 1 and 2. It may be. The outer projecting portion 102 can prevent the needle protector 2 from moving to the proximal end side by an unexpected external force before using the lancet 1 and making it difficult to perform the attaching operation to the puncture device 50 or 1050.

  Although it is economical to integrally form the lancet hub 16, the needle 14 and the lancet hub 16 of the needle tip protecting member 10, the manufacturing method is arbitrary. The same applies to the needle protector 2, the elastic body 3, and the needle protector support portion 4. Alternatively, the needle tip protecting member 10 and the needle protector 2 may be integrally formed, and each member may be separately manufactured and assembled. The material of each part other than the elastic body 3 is not particularly limited.

  In addition, the size and weight of the lancet with a needle protector according to the present invention can be arbitrarily changed according to the puncture device to be attached, and is not particularly limited.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

(A) It is an external view which shows the lancet with a needle protector of this invention, (b), (c) A longitudinal cross-sectional view. (A) It is an external view which shows the lancet with a needle protector of another embodiment of this invention, (b), (c) It is a longitudinal cross-sectional view. It is an enlarged view of the elastic body part of the lancet with a needle protector of the present invention. (A) It is an external view which shows the example of the general puncture tool which attaches a lancet. (B) It is sectional drawing of the puncture tool of Fig.4 (a) which mounted | wore with the lancet. (A) (b) (c) It is explanatory drawing which shows the mode of the preparation before puncture of the lancet with a needle protector of this invention. (A) (b) (c) (d) (e) It is explanatory drawing which shows the motion at the time of puncture of the lancet with a needle protector of this invention. It is explanatory drawing which shows a mode of removal from a puncture tool after use of the lancet with a needle protector of this invention. (A) It is an external view which shows the lancet with a needle protector of another embodiment of this invention, and (b) is a longitudinal cross-sectional view. (A) It is an external view which shows the lancet with a needle protector of another embodiment of this invention, and (b) is a longitudinal cross-sectional view. (A) It is an external view which shows the lancet with a needle protector of another embodiment of this invention, and (b) is a longitudinal cross-sectional view. It is an external view which shows the conventional lancet. (A) It is an external view which shows the main body of the common puncture tool which attaches a lancet. (B) It is an external view of the puncture device of Fig.4 (a) equipped with the lancet. (C) It is an external view of the puncture device of Fig.4 (a) which shows a mode that a needlepoint protection member is removed from a lancet and a cap is fitted to a main body. (A) (b) (c) It is explanatory drawing which shows the mode of the preparation before puncture of the conventional lancet shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1001 Lancet 2 Needle protector 3 Elastic body 4 Needle protector support part 5 Breaking part 6 Locking means 7 Locked means 10, 1010 Needle point protection member 101 Inner protrusion part 102 Outer protrusion part 12, 1012 Needle point 14, 1014 Needle 16, 1016 Lancent hub 50, 1050 Puncture tool 51, 1051 Puncture body 52, 1052 Lancet carrier 54, 1054 Trigger button 1056 Casing 58, 1058 Cock 60, 1060 Cap 62 Lancet firing spring 64 Tip opening

Claims (9)

Needle,
A lancet hub that supports the needle so that the needle tip can be exposed;
A cylindrical needle protector extrapolated so as to be axially movable at the tip of the lancet hub;
An elastic body connecting the needle protector and the lancet hub;
A lancet with a needle protector. Needle,
A lancet hub that supports the needle so that the needle tip can be exposed;
A cylindrical needle protector extrapolated so as to be axially movable at the tip of the lancet hub;
A needle protector support for receiving a rear end portion of the lancet hub;
An elastic body connecting the needle protector and the needle protector support;
A lancet with a needle protector.   The lancet with a needle protector according to claim 1 or 2, wherein the elastic body is a belt-like elastic body.   The lancet with a needle protector according to claim 1 or 2, wherein the elastic body is a coiled spring.   The lancet with a needle protector according to any one of claims 1 to 4, further comprising a needle tip protecting member that protects the needle tip of the needle.   The lancet with a needle protector according to claim 5, wherein the needle tip protecting member and the lancet hub are integrally formed.   The lancet with a needle protector according to claim 5, wherein the needle tip protecting member and the needle protector are integrally formed.   The needle tip protection member includes an inner projecting portion that can protect the needle tip and an outer projecting portion that is disposed on the outer peripheral surface of the needle protector. Lancet. Locking means formed on the side surface of the tip of the lancet hub;
Locked means formed at the rear end of the needle protector and capable of locking the locking means;
A lancet with a needle protector according to any one of claims 1 to 7.

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