JP2007259954A - Puncture device and blood component measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely charge biasing force of a puncture mechanism when sending out a puncture needle by mounting a chip for measuring blood including the puncture needle. <P>SOLUTION: A cap 164 covering an abutting portion 142 is mounted on the chip 20 for measuring blood having the puncture needle 18, a pushing pin 168 extending toward a casing 12 side onto which the chip 20 is mounted is arranged in the cap 164. A slide shaft 86 and a holder 64 are displaced while compressing a set of guide springs 62 by the pushing pin 168 and the holder 64 is engaged with the engaging member 92 when mounting the chip 20 for measuring blood onto a block portion 16 in the casing 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a puncture device and a blood component measurement device for measuring components such as glucose in blood, and more specifically, a puncture needle tip having a puncture needle that can advance and retract in the axial direction and a blood measurement tip are incorporated. The present invention relates to a puncture device and a blood component measurement device.

  In recent years, diabetic patients have been encouraged to perform daily self-management by measuring their own blood glucose level fluctuations. In order to measure this blood glucose level, for example, a test paper impregnated with a reagent that is colored according to the amount of glucose in the blood is attached, and blood is supplied to the test paper to cause coloration. A blood component measuring apparatus that optically measures the degree and displays a blood glucose level as a numerical value has been put into practical use. A blood component measuring apparatus using an electrochemical sensor has also been put into practical use. When a patient collects his / her blood, a puncture device is provided that has a puncture needle that can advance and retreat in the axial direction, and punctures the skin by momentarily protruding the puncture needle by applying a repulsive force by an elastic body. A small amount of blood is derived by use. The puncture needle tip is replaced every time measurement is performed for hygiene reasons.

  In addition, a puncture step and a measurement step are automatically and continuously performed by providing a measurement member such as a test paper integrally with a puncture needle tip used for blood collection and mounting the measurement member on a blood component measurement device. Equipment has been developed.

  For example, there is known a blood component measuring apparatus configured to charge a driving force for performing the puncturing step using the pressing force when an integrated chip having the measuring member is mounted.

  In such a blood component measuring device, as shown in FIG. 22, a lancet 2 having a needle 1 is provided inside a sensor 3 so as to be displaceable, and the needle 1 protrudes outside from a cover 3 a of the sensor 3. Protective cover 4 is attached to. The needle 1 is covered and protected by a cylindrical tube 4 a formed on the protective cover 4.

  As shown in FIG. 23, when the sensor 3 is attached to the measurement device 5, the measurer inserts the sensor 3 into the attachment port 5a of the measurement device 5 while holding the protective cover 4, and the measurement device 5 By pressing toward the inside of the device 5, the end of the sensor 3 is inserted into the recess 6 a of the connector receiver 6 provided in the measuring device 5 (note that the protective cover 24 is omitted in FIG. 23). Have been). At this time, the connector receiver 6 is displaced while compressing the coil spring 7.

  Then, the tapered protrusion 6b provided on the upper part of the connector receiver 6 is engaged with the tapered protrusion 5b provided on the measuring device 5, whereby the connector receiver 6 and the coil receiver 7 are compressed in a compressed state. The displacement of the sensor 3 held by the connector receiver 6 is restricted. The elastic force of the compressed coil spring 7 functions as a driving force when the sensor 3 including the needle 1 is pushed out toward the measurer side (see, for example, Patent Document 1).

International Publication No. 02/056769 Pamphlet

  By the way, in the prior art which concerns on patent document 1, since it has the structure which hold | grips the protective cover 4 and mounts the sensor 3 in the measuring apparatus 5, the said sensor 3 is pressed via the thin tube 4a of the protective cover 4. FIG. The Rukoto. Therefore, it becomes difficult to efficiently apply the pressing force from the protective cover 4 to the sensor 3, and there is a concern that the sensor 3 cannot be attached to the connector receiver 6 of the measuring device 5 with a desired pressing force.

  Further, the protective cover 4 is made weak at the joint with the lancet 2 so that it can be removed during use. When a pressing force is applied to the protective cover 4, a slight non-uniform force is applied in the axial direction of the tube 4a. When added, the tube 4a may be bent with the joint as a base point. That is, when the sensor 3 is attached to the measuring device 5, there is a concern that the needle 1 contained in the tube 4a may be bent, and puncture with the bent needle 1 leads to increased pain for the user. It becomes.

  The present invention has been made in consideration of the above-mentioned problems. By attaching a puncture needle tip including a puncture needle or a blood measurement tip, the urging force to the puncture mechanism when the puncture needle is delivered can be reliably and An object is to provide a puncture device and a blood component measurement device that can be stored easily.

In order to achieve the above-mentioned object, the present invention provides a puncture device that is used by attaching a puncture needle tip having a puncture needle that can advance and retreat in the axial direction in a housing.
A casing,
A puncture unit that is displaceably provided in the casing and holds the puncture needle;
Biasing means for storing a biasing force for moving the puncture unit toward the puncture site of the skin,
A cap having a contact portion for allowing the puncture needle tip to contact the periphery of the skin puncture site, a cover portion covering the contact portion, and a shaft portion extending from the cover portion toward the casing; ,
With
When the puncture needle tip having the cap is mounted on the casing, the biasing means is charged by the shaft portion of the cap pressing the puncture unit.

  According to the present invention, the puncture unit that holds the puncture needle is provided so as to be movable toward the puncture site of the skin under the biasing action of the biasing means, and the puncture needle tip is attached to the casing, thereby The puncture unit is pressed through the shaft portion of the cap attached to the needle tip, and the urging force is charged by the urging means.

  Accordingly, the pressing force when the puncture needle tip is attached to the casing is used, and the urging force when the puncture unit is moved toward the puncture site of the skin is energized by a simple operation of attaching the puncture needle tip. The means can be stored reliably and easily. Further, since the cap for charging the urging means is configured separately from the puncture needle tip including the puncture needle, when the urging force is accumulated through the cap, the pressing force from the puncture needle tip is applied to the puncture needle. It is not applied to the needle. Therefore, the puncture needle is not bent in the puncture device, and the measurer can puncture reliably and safely.

  Furthermore, since the cap is removed when the puncture needle tip is used, the urging means cannot be charged even if the puncture needle tip with the cap removed after use is reattached to the puncture device. It is possible to prevent reuse of used chips.

  Furthermore, when the puncture needle tip provided with the cap is mounted on the casing, the shaft portion of the cap presses the displacement member. Further, the urging means may be charged by the displacement member pressing the puncture unit. That is, by attaching the puncture needle tip provided with the cap to the casing, it is possible to easily charge the urging means that can urge the puncture unit via the displacement member.

  Furthermore, the biasing force is biased by having a latching means for latching the puncture unit or the displacement member while the biasing means is charged, and a release means for releasing the latched state of the latching means. The locked state of the puncture unit or the displacement member being released can be simply released by the release means, and the puncture unit or the displacement member can be moved toward the puncture site on the skin under the urging action of the urging means. it can.

Still further, the present invention provides a blood component measurement device that is used by mounting a blood measurement chip including a puncture needle that can advance and retreat in the axial direction in a housing.
A casing,
A puncture unit that is displaceably provided in the casing and holds the puncture needle;
First urging means for storing an urging force for displacing the puncture unit toward the puncture site of the skin,
The blood measurement chip has a contact portion for contacting the periphery of the puncture site of the skin, a cover portion covering the contact portion, and a shaft portion extending from the cover portion toward the casing side. And
When the blood measuring chip having the cap is mounted on the casing, the first biasing unit is charged by the shaft portion of the cap pressing the puncture unit.

  According to the present invention, the puncture unit that holds the puncture needle is provided so as to be displaceable toward the puncture site of the skin under the biasing action of the first biasing means, and the blood measurement chip is mounted on the casing. The needle-piercing unit is pressed through the shaft portion of the cap attached to the blood measurement chip, and the urging force is charged by the first urging means.

  Accordingly, the first biasing force for displacing the puncture unit toward the puncture site of the skin can be obtained by a simple operation of using the pressing force when the blood measurement tip is attached to the casing and attaching the blood measurement tip. It can be reliably and easily stored by the biasing means. In addition, since the first urging means is configured separately from the blood measurement chip including the puncture needle, when the urging force is stored via the first urging means, the first urging means is pushed from the blood measurement chip. No pressure is applied to the puncture needle. Therefore, the puncture needle does not bend in the blood component measurement device, and the measurer can puncture reliably and safely.

  Furthermore, since the cap is removed when the blood measurement chip is used, the first biasing means is charged even if the blood measurement chip with the cap removed after use is mounted on the blood component measurement device again. Therefore, it is possible to prevent reuse of used chips.

  Furthermore, when the blood measuring chip provided with a cap is mounted on the casing, the shaft portion of the cap is provided with the displacement member. The first urging means may be charged by pressing the urging unit and the displacement member pressing the puncture unit. As a result, the pressing force from the shaft portion of the cap is directly transmitted to the displacement member without being transmitted to the puncture needle. Therefore, the biasing force can be reliably and easily charged by the first biasing means using the pressing force. can do.

  Furthermore, the first attaching means includes a locking means for locking the puncture unit or the displacement member in a state where the first biasing means is charged, and a release means for releasing the locking state of the locking means. The locking state of the puncture unit or the displacement member to which the urging force by the urging means is urged is simply released by the release means, and the puncture unit or the displacement member is removed from the skin under the urging action by the first urging means. It can be displaced toward the puncture site.

  In addition, when mounting the blood measurement chip having the cap on the casing, the shaft portion of the cap charges the plurality of biasing means via the displacement member, so that the plurality of biasing means are individually provided. There is no need to charge, and charging can be performed simultaneously and collectively. Therefore, even when a plurality of urging means are provided for the puncture device and the blood component measurement device, the charging operation can be performed efficiently.

  Furthermore, the blood measurement chip has a reagent part that reacts with blood components and a blood introduction part for guiding blood to the reagent part. After puncturing the skin with the first biasing means, the blood introduction part is A biasing force for operating a release mechanism for releasing the state where the displacement of the contact portion with respect to the blood introduction portion is restricted and a release mechanism for releasing the displacement restriction means for the contact portion so as to approach the puncture site When the blood measurement chip having the cap is attached to the casing, the first urging means and the second urging means may be charged at the same time.

  Thereby, when the cap of the blood measurement chip is attached to the casing, the first urging means and the second urging means can be charged at the same time by the shaft portion of the cap. Can be done.

  Furthermore, in the blood measurement chip, the cap cover portion seals the opening at one end of the housing, and the enlarged diameter portion of the hub that holds the puncture needle is in circumferential contact with the inner surface of the housing. The puncture needle may be sealed in a sterilized state. Thereby, the sterilization state of the puncture needle is suitably maintained until puncture by the puncture needle is performed.

  According to the present invention, the following effects can be obtained.

  That is, when the puncture needle tip or the blood measurement tip is attached to the casing, the biasing means connected to the puncture unit can be charged via the shaft portion of the cap provided on the blood measurement tip. For this reason, the pressing force applied to the cap is directly transmitted to the puncture unit without passing through the hub of the puncture needle, so that the pressing force is efficiently transmitted, and the biasing means can be charged reliably and easily.

  In addition, since it is possible to charge the puncture needle without applying stress (pressing force), bending or warping in the puncture needle that may occur when the puncture needle is provided on a path through which the stress is transmitted. Etc. can be prevented.

  Further, since the cap of the puncture needle chip or blood measurement chip is removed during use, the puncture needle chip or blood measurement chip from which the cap has been removed after use is attached to the puncture device or blood component measurement device. Since the urging means cannot be charged even if it is mounted again, it is possible to prevent the used chip from being reused.

  Furthermore, the shaft portion provided on the cap of the blood measurement chip can charge the urging means for puncturing the skin and other urging means at the same time, so that each urging means is charged individually. The labor can be saved and the usability can be improved, and the possibility that a plurality of functions can be added to the puncture device and the blood component measuring device is widened.

  Preferred embodiments of a puncture device and a blood component measurement device according to the present invention will be described in detail below with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates a blood component measuring apparatus according to an embodiment of the present invention. The blood component measuring apparatus 10 according to the present embodiment measures a component such as glucose in the blood or the amount of the component (hereinafter referred to as blood glucose level).

  As shown in FIGS. 1 to 5, the blood component measuring apparatus 10 includes a casing 12, a block portion 16 disposed in the casing 12 via a housing 14, and a puncture needle 18. A blood measurement tip (puncture needle tip) 20 attached to the unit 16; and a puncture unit 22 that holds the puncture needle 18 and moves forward and backward along the axial direction. Further, the blood component measuring apparatus 10 includes a stopper mechanism 24 for restricting relative displacement of the housing 14, a button unit 26 for switching the advancing / retreating operation of the puncture unit 22, and the puncture unit 22 on the side of a measurer (not shown). And a charge mechanism 28 that stores a driving force when displaced toward the front.

  The casing 12 is formed of a hollow box, and a lever groove 30 extending by a predetermined length along the axial direction is formed on the upper surface of the opened one end. The lever groove 30 is formed above the block portion 16. The provided recharge lever 32 is provided to be displaceable along the axial direction. A pair of block holes 34 are formed on both side surfaces of the casing 12 on one end side. The block hole 34 is formed in a substantially rectangular shape, and a stopper block 36 of the stopper mechanism 24 provided in the casing 12 is inserted therein.

  On the other hand, a button hole 40 through which the pressing portion 38 of the button unit 26 is inserted is formed in the other end portion of the casing 12. The pressing portion 38 is provided so as to protrude to the outside of the casing 12 through the button hole 40.

  The housing 14 is provided in the casing 12 so as to be displaceable in the axial direction, and is formed in a substantially U-shaped cross section that opens toward one end of the casing 12 and the lever groove 30 side. And the button unit 26 is arrange | positioned between the edge part of the housing 14, and the other end part of the casing 12 (refer FIG. 5).

  The button unit 26 includes a holding member 44 connected to the other end of the casing 12 via a first bracket 42, and a button member (release means) 46 that is held movably with respect to the holding member 44. including. In the button member 46, the pressing portion 38 provided at one end is inserted into the button hole 40 of the casing 12, and the other end is inserted into the hole 50 of the housing 14 through the through hole 48 of the holding member 44. ing. In addition, an inclined portion 52 is provided at the other end of the button member 46 so as to face the bottom wall surface 14a of the housing 14, and the inclined portion 52 is gradually inclined upward in a direction away from the pressing portion 38. is doing.

  A first button spring 54 is interposed between the end of the pressing portion 38 and the holding member 44 via a flange. The first button spring 54 separates the button member 46 from the holding member 44. It is biased in the direction (arrow A direction). That is, the button member 46 is always biased in a direction in which the pressing portion 38 protrudes from the button hole 40 of the casing 12 to the outside.

  Further, the holding member 44 is provided with a second button spring 58 between the end surface of the housing 14 via a guide shaft 56 protruding toward the housing 14 (arrow B direction), and the housing 14 is always attached. It is biased in a direction (arrow B direction) to be separated from the holding member 44.

  On the other hand, a set of guide shafts 60 is provided in the housing 14 along the longitudinal direction, and one end of the guide shaft 60 is engaged with the end of the housing 14. The guide shafts 60 are provided at a predetermined distance from each other, and guide springs (first urging means) 62 are respectively inserted therethrough. The other end portion of the guide shaft 60 is inserted into the holder (displacement member) 64 constituting the charge mechanism 28 and the insertion holes 68 a and 68 b of the yoke 66 to constitute the block portion 16, and the first and second blocks 70. , 72 are respectively connected to the end portions. That is, the guide shaft 60 is fixed between the end portion of the housing 14 and the end portion of the block portion 16.

  The holder 64 includes a pair of cylindrical portions 74 projecting toward the button unit 26 (in the direction of arrow A), a unit hole 76 formed in a substantially central portion through which the puncture unit 22 is inserted, and a direction opposite to the cylindrical portion 74. And a guide portion 78 projecting in the direction of arrow B. The guide shaft 60 is inserted into the cylindrical portion 74 through an insertion hole 68a penetrating along the axial direction.

  The yoke 66 is formed to have a substantially U-shaped cross section. One end of the yoke 66 is disposed on the bottom wall surface 14 a side of the housing 14, and the other end is coupled to a slider 80 described later via a screw member 82. Yes. A pair of insertion holes 68b through which the guide shaft 60 is inserted are formed at one end of the yoke 66, and a substantially center portion of the yoke 66 is formed in an arch shape, and a hub holder 84 constituting the puncture unit 22 and A slide shaft (displacement member) 86 is inserted.

  Further, at one end portion of the yoke 66, a tooth portion 88 is formed on the upper portion of the insertion hole 68b facing the slider 80. The tooth portion 88 is formed substantially parallel to the axis of the insertion hole 68b.

  An insertion groove 90 into which the guide portion 78 of the holder 64 is inserted is formed at the other end portion of the yoke 66, and when the holder 64 including the guide portion 78 is displaced toward the yoke 66 side (arrow B direction). The guide portion 78 is inserted into a space formed by the insertion groove 90 of the yoke 66 and the guide groove 80a of the slider 80.

  Further, as shown in FIG. 6, a locking member (displacement restricting means) 92 is mounted on the bottom wall surface 14 a of the housing 14 via a screw member 82, and the locking member 92 is formed by the screw member 82. It is provided so as to be tiltable downward by a predetermined angle with the fixed part as a fulcrum. The locking member 92 extends in a direction away from the button unit 26 (in the direction of arrow B), and is provided in an arm portion 94 formed in a bifurcated shape and a substantially central portion serving as a base point of the arm portion 94. And a protrusion 96 protruding toward the inside of the housing 14. An inclined surface 96a that is gradually inclined downward toward the button unit 26 side is formed at the end of the projecting portion 96, and the inclined portion 52 contacts the inclined surface 96a when the button member 46 is displaced. Touch. That is, the locking member 92 is arranged on a substantially straight line so that the protrusion 96 can come into contact with the inclined portion 52 of the button member 46.

  A locking claw 98 is formed at the tip of the arm portion 94 so as to protrude away from the bottom wall surface 14a, and gradually inclines upward toward the button unit 26 side (arrow A direction). ing. When the holder 64 is displaced along the axial direction, the locking claw 98 is pushed by the holder 64 and the locking member 92 having the locking claw 98 tilts downward, so that the holder 64 The engaging recess 100 (see FIG. 3) provided between the shaft hole 64a and the pair of insertion holes 68a is locked. This restricts the holder 64 from being displaced in the direction away from the button unit 26 (in the direction of arrow B).

  On the other hand, damper mechanisms 104 having gears 102 are respectively mounted on both side surfaces of the housing 14 through holes, so that the gears 102 protrude to the inside of the housing 14 and can mesh with the teeth 88 of the yoke 66. is set up.

  The damper mechanism 104 is provided with a decelerating means (not shown) for decelerating the rotation speed of the gear 102 to a predetermined speed. By reducing the rotation speed of the gear 102, the yoke 66 with which the gear 102 is engaged is provided. The displacement speed along the axial direction is reduced. That is, when the yoke 66 is displaced along the axial direction under the displacement action of the slider 80, the yoke 66 is engaged with the gear 102 of the damper mechanism 104 via the tooth portion 88, so that resistance is generated. The displacement is delayed, and the displacement speed is reduced by a predetermined speed.

  For example, this speed reducing means is made of viscous pressure oil, and when the rotation shaft of the gear 102 is inserted into the pressure oil, it becomes a resistance when the rotation shaft rotates due to the viscosity, and is connected to the rotation shaft. The rotational speed of the gear 102 is reduced.

  The block portion 16 is connected to one end portion side of the opened housing 14 via a connection screw 106, and is arranged on the other side surface side of the first block 70 disposed on one side surface of the housing 14. The second block 72 is provided. The first and second blocks 70 and 72 are integrally connected by a connecting screw 107.

  The first and second blocks 70 and 72 are each provided with a holding groove 110 for holding the blood measurement chip 20 on the side surfaces facing each other, and the holding groove 110 formed in a substantially semicircular cross section has the first and second blocks When the second blocks 70 and 72 are assembled, the cross-section becomes circular, and the blood measurement chip 20 is held.

  Further, the first and second blocks 70 and 72 are formed with mounting holes 112 having a substantially rectangular cross section toward both side surfaces of the casing 12. The mounting holes 112 constitute a stopper mechanism 24. Stopper blocks 36 are respectively provided.

  The mounting hole 112 is formed with a pair of pin holes (not shown), and the stopper block 36 is displaceable with respect to the mounting hole 112 via a stopper pin 114 mounted in the pin hole. Be supported.

  The second block 72 includes a bottom wall portion 116 extending toward the first block 70 at the lower portion on the bottom wall surface 14 a side of the housing 14, and extends substantially in the center of the bottom wall portion 116 along the axial direction. A guide groove 118a is provided. The guide groove 118a is formed in a substantially semicircular cross section, and a slide shaft 86 constituting the charge mechanism 28 is supported so as to be displaceable along the axial direction.

  An upper portion of the first block 70 is provided with a recharge lever 32 that is displaceable along the axial direction. The recharge lever 32 has an operation portion 120 that protrudes upward from the lever groove 30 of the casing 12 to the outside. ing. The recharge lever 32 is provided with a tension spring 124 between a hook 122 a protruding toward the first block 70 and a hook 122 b provided on the upper surface of the first block 70. The recharge lever 32 is always urged toward the blood measurement tip (in the direction of arrow B) by the tension spring 124.

  The slider 80 is formed in a substantially U-shaped cross section having a guide groove 80a along the axial direction, and is formed by opening one end portion on the blood measurement chip 20 side (arrow B direction). A yoke 66 is coupled to a substantially central portion along the axial direction of the slider 80, and a guide portion 78 of the holder 64 is inserted into the guide groove 80a. That is, the yoke 66 is integrally displaced under the displacement action of the slider 80, and the holder 64 can be displaced in the axial direction with respect to the slider 80 via the guide portion 78.

  One end of the slider 80 is formed to be widened in the width direction orthogonal to the axis of the slider 80, and a set of shaft holes 126 penetrating along the longitudinal direction of the slider 80 are formed in the widened portion. The The shaft holes 126 are formed in parallel with each other, and a set of protrusions 128 are provided on the inner peripheral surface of the shaft hole 126 along the axial direction. The protrusions 128 are provided so as to face each other (see FIG. 3).

  A rotating shaft 130 is inserted into the shaft hole 126, and a torsion groove 136 formed on the outer peripheral surface of the rotating shaft 130 is engaged with the protrusion 128. The rotating shaft 130 includes a shaft portion 132 inserted into the shaft hole 126 and a wide presser portion 134 formed at one end portion of the shaft portion 132 and bulging radially outward with respect to the shaft portion 132. The twisted groove 136 is formed on the outer peripheral surface of the shaft portion 132. The pressing portion 134 is provided so as to be able to contact the other end portion of the contact member 138 constituting the blood measurement chip 20, and restricts upward displacement under the contact action with respect to the contact member 138. Yes. That is, the presser portion 134 of the rotating shaft 130 functions as a stopper that restricts the displacement of the contact member 138.

  The twist groove 136 extends in the axial direction from the other end portion of the shaft portion 132 on the button unit 26 side (arrow A direction), and gradually extends along the outer peripheral surface about the axis line of the shaft portion 132. It is formed to circulate only by °. Specifically, the shape of the twisted groove 136 is formed so as to be symmetric about the axis of the slider 80 in the pair of rotating shafts 130.

  Then, the rotary shaft 130 is rotationally displaced within the shaft hole 126 by about 90 ° under the engagement action of the protrusion 128 and the twisted groove 136 by the slider 80 being displaced along the axial direction. At this time, the rotating shaft 130 rotates in opposite directions so that the presser portions 134 are separated from each other. That is, the pair of presser portions 134 is in a substantially horizontal state rotated to both side surfaces of the casing 12 in which the block holes 34 are formed. Thereby, the displacement regulation state of the contact member 138 by the pressing portion 134 is released, and the contact member 138 can be displaced upward through a pressing force against the skin of the measurer.

  The rotary shaft 130 is displaced in the direction away from the button unit 26 (in the direction of arrow B) by the end surface of the second bracket 108 fixed to the upper surfaces of the first and second blocks 70 and 72, that is, blood. Separation from the component measuring apparatus 10 is suppressed.

  The blood measurement chip 20 includes a puncture needle 18, a hub 140 that holds the puncture needle 18, a tip body 154 that holds the puncture needle 18 and the hub 140 movably along the axial direction, and a measurer. A contact portion 142 that can contact the skin of the subject and a test paper 144 into which the blood of the measurer is introduced. A measurement unit 146 is provided above the first and second blocks 70 and 72 so as to face the test paper 144 when the blood measurement chip 20 is mounted.

  The measuring unit 146 includes a light emitting element (for example, an LED-Light Emitting Diode) and a light receiving element (for example, a PD-Photo Detector), and an optical change amount read through the measuring unit 146 is a control (not shown). Calculated by the display unit and displayed as a measurement result through the display unit.

  The hub 140 is formed in a cylindrical shape, and the puncture needle 18 protrudes at one end thereof, and the small diameter portion 148 formed on the other end side is inserted into the hub gripping portion 150 of the puncture unit 22. Thereby, the hub 140 is held with respect to the puncture unit 22. The puncture needle 18 is sterilized in advance, and the sterilized state is maintained until use.

  The contact portion 142 includes an annular contact member 138 that contacts the periphery of the puncture site on the skin of the measurer (see FIG. 4).

  The abutting member 138 is formed at a substantially central portion thereof, and a central hole 156 through which the puncture needle 18 is inserted, and a hollow portion 158 that is formed at one end side and is recessed in an arc shape corresponding to the shape of the fingertip of the measurer. And a set of inclined portions 160 formed on the other end side and inclined at a predetermined angle with respect to the axis of the contact member 138. Since the contact member 138 has a tapered surface that gradually decreases in diameter from the end surface that contacts the measurer toward the center hole 156, the skin is directed from the outside to the inside when the fingertip is contacted. The blood can be collected around the center, and blood bleeding can be promoted during puncture.

  The inclined portion 160 has a first inclined surface 162 that is formed on both sides centered on the center hole 156 and is inclined downward from the end of the inclined portion 160 toward the recessed portion 158 side.

  On the other hand, a cap 164 that covers the contact portion 142 is detachably attached to the blood measurement chip 20. The cap 164 includes a circular cover portion 166 and a pressing pin (shaft portion) 168 connected to a position offset radially outward from the center of the cover portion 166. The cap 164 is attached to the contact portion 142 in advance before the blood measurement chip 20 is loaded into the blood component measurement device 10, and after the blood measurement chip 20 is loaded, the contact is performed. Removed from portion 142.

  The tip body 154 includes a guide block 170 in which the contact portion 142 is slidably provided, and a cylindrical portion 172 that extends toward the puncture unit 22 with respect to the guide block 170 and can hold the hub 140 inside. . The guide block 170 includes a needle hole 174 through which the puncture needle 18 is inserted, and a pair of second inclined surfaces 176 that are formed on both sides around the needle hole 174 and against which the contact member 138 contacts. At the upper part of the guide block 170, a base 180 having a test paper 144 mounted on a loading unit 178 is provided. Examples of the material of the test paper 144 include polyethersulfone. Examples of the reagent carried on the test paper 144 include color formers such as glucose oxidase (GOD), peroxidase (POD), 4-aminoantipyrine, N-ethyl N- (2-hydroxy-3-sulfopropyl), and the like. . An introduction portion 182 that protrudes toward the contact portion 142 side is formed on the side surface of the base 180, and an introduction passage 182 a that communicates the outside with the loading portion 178 is formed inside the introduction portion 182. The That is, the blood guided to the introduction passage 182a of the introduction unit 182 is supplied to the test paper 144 of the loading unit 178.

  Under the guide block 170, a guide groove 118b in which the slide shaft 86 and the pressing pin 168 are held so as to be displaceable is formed. That is, when the chip body 154 is mounted on the block portion 16, the pressing pin 168 is guided by the guide grooves 118 a and 118 b of the second block 72 so as to be displaceable along the axial direction.

  The cylindrical portion 172 is formed in a cylindrical shape, and is inserted and held in the holding grooves 110 of the first and second blocks 70 and 72.

  The puncture unit 22 includes a hub holder 84 that is elongated along the axial direction, a hub holding portion 150 that is formed at one end of the hub holder 84 and holds the hub 140 of the blood measurement chip 20, and the hub holder 84. And a return spring 186 that urges the hub holder 84 toward the button unit 26 (in the direction of arrow A), and a direction in which the hub holder 84 is separated from the button unit 26 (indicated by an arrow). And a puncture spring 188 biased in the B direction).

  An end portion of the return spring 186 on the blood measurement chip 20 side (arrow B direction) and an end portion of the puncture spring 188 on the button unit 26 side (arrow A direction) are fixed to a part extending from the block portion 16. Yes.

  The hub holder 84 is provided inside the housing 14 and the block portion 16 so as to be displaceable along the axial direction. The hub holder 84 is connected to the hub holding portion 150 at one end of the hub holder 84 via the small diameter portion 148 of the blood measurement chip 20. The hub 140 is fitted, and the distance between the small diameter portion 148 and the hub holder 84 (hub holding portion 150) is kept constant by a cylindrical spacer 190 disposed on the outer peripheral side of the hub holding portion 150. As a result, the hub 140 is accurately held with respect to the hub holder 84.

  The stopper mechanism 24 is provided in each of the first and second blocks 70 and 72. The stopper block 36 is provided so as to be displaceable in the mounting holes 112 of the first and second blocks 70 and 72. A block spring 192 interposed between the mounting hole 112, a stopper rod 194 that is engaged with the stopper block 36 and is displaceable in the axial direction of the housing 14, and provided at the end of the stopper rod 194. And a rod cap 196 with which a part of the blood measurement chip 20 can contact, and a rod spring 198 inserted through the stopper rod 194. The rod spring 198 urges the rod cap 196 in the direction separating the stopper block 36 (arrow B direction).

  The stopper blocks 36 are respectively provided in the mounting holes 112 and are inserted into the block holes 34 of the casing 12 under the action of displacement in the axial direction. The stopper block 36 is formed in a substantially U-shaped cross section, and a rod groove 200 that is recessed in a direction away from the stopper rod 194 is formed in the inner wall surface on the button unit 26 side (arrow A direction). (See FIG. 5). The rod groove 200 is formed of a set of inclined surfaces that are inclined by about 45 ° toward the central portion in the displacement direction (arrow C1, C2 direction) of the stopper block 36, and is formed in a substantially V-shaped cross section.

  Further, the stopper block 36 is formed with a recessed portion 202 that is recessed at a predetermined depth on the outer surface on the button unit 26 side (arrow A direction), and when the stopper block 36 is inserted into the block hole 34 of the casing 12. The end of the block hole 34 is engaged with the recess 202. That is, when the stopper block 36 is locked to the casing 12 via the recess 202, displacement of the stopper block 36 along the axial direction (arrow C1, C2 direction) is restricted.

  Further, the stopper block 36 is formed with a pair of long holes 204 through which the stopper pins 114 supported by the first and second blocks 70 and 72 can be inserted. When arranged in the position, the axis is formed so as to be substantially orthogonal to the axis of the stopper rod 194. That is, the stopper block 36 is supported via the stopper pin 114 so as to be displaceable in a direction substantially perpendicular to the axis of the casing 12 (arrow C1 and C2 directions).

  Further, the stopper block 36 is always urged toward the casing 12 side (in the direction of the arrow C <b> 1) located outside the block portion 16 by the elastic force of the block spring 192.

  The stopper rod 194 is inserted through rod holes 206 formed in the first and second blocks 70 and 72 so as to be freely displaceable, and at one end on the stopper block 36 side (arrow A direction), An engaging portion 208 that contacts the rod groove 200 is formed. The engaging portion 208 is formed such that the side surface facing the stopper block 36 is inclined at a predetermined angle (for example, 45 °) with respect to the axis of the stopper rod 194 and is in contact with the inclined surface of the rod groove 200 of the stopper block 36. It is formed so that it can touch. That is, the inclined surface of the engaging portion 208 is in surface contact with the inclined surface of the rod groove 200.

  The rod cap 196 is attached to the other end of the stopper rod 194, and a link hole 210 having a predetermined length along the axial direction is formed. A link pin 212 supported by the first and second blocks 70 and 72 is inserted through the link hole 210. As a result, the amount of displacement of the rod cap 196 along the axial direction is restricted under the engaging action of the link pin 212. A rod spring 198 is interposed between the rod cap 196 and the engaging portion 208.

  The charging mechanism 28 is provided inside the housing 14 and can be displaced along a pair of guide shafts 60, and a slide shaft 86 that can be displaced along the axial direction in the housing 14 together with the holder 64. And a pressing pin 168 provided on a cap 164 attached to the blood measurement chip 20 and capable of pressing the slide shaft 86.

  The slide shaft 86 is formed in an elongated shape, and one end portion thereof is inserted into and locked in the shaft hole 64a of the holder 64, so that the slide shaft 86 is integrated with the holder 64 along the guide grooves 118a and 118b. It is displaced to.

  The pressing pin 168 is provided by being offset radially outward from the center of the cover portion 166 formed in a columnar shape, and protrudes by a predetermined length in a direction away from the cover portion 166. The diameter of the pressing pin 168 is set substantially equal to the diameter of the slide shaft 86. The pressing pin 168 is guided by the guide grooves 118 a and 118 b together with the slide shaft 86 when the slide shaft 86 is pressed toward the button unit 26 (in the direction of arrow A).

  That is, when the slide shaft 86 is pressed toward the button unit 26 (in the direction of arrow A) by the pressing pin 168, the holder 64 together with the slide shaft 86 is displaced along the axial direction under the guide action of the guide shaft 60. . At this time, the holder 64 is displaced against the elastic force of the pair of guide springs 62, and the guide springs 62 are retracted to the button unit 26 side.

  Thereafter, the holder 64 comes into contact with a flange 84a provided at the end of the puncture unit 22 on the button unit 26 side, and presses the flange 84a toward the button unit 26 to compress the puncture spring 188, that is, press The puncture unit that holds the puncture needle 18 and the driving force of the mechanism for releasing the displacement restriction state of the contact member 138 (described later) driven by the guide spring 62 by pressing the pin 168 to the button unit 26 side. The driving force for driving 22 is stored.

  The blood component measuring apparatus 10 according to the embodiment of the present invention is basically configured as described above. Next, when the blood measuring chip 20 is attached to the blood component measuring apparatus 10 Will be described.

  The state in which the blood measurement chip 20 is not attached to the block portion 16 disposed inside the casing 12 shown in FIGS. 5 and 6 is defined as an initial state.

  In this initial state, the holder 64 is pressed in the direction away from the button unit 26 (in the direction of arrow B) by the elastic force of the guide spring 62, and the yoke 66 and the slider 80 together with the holder 64 move toward the block portion 16 side. And is displaced. Further, the stopper rod 194 and the rod cap 196 constituting the stopper mechanism 24 are displaced in a direction (arrow B direction) away from the button unit 26 under the resilient action of the rod spring 198, and the stopper block 36 is moved by the block spring 192. Displacement of the casing 12 toward the block hole 34 (in the direction of arrow C1) restricts relative displacement along the axial direction (in the directions of arrows A and B) between the housing 14, the block portion 16, and the casing 12. (See FIG. 5).

  First, as shown in FIGS. 7 and 8, the blood measurement chip 20 is inserted from one end side of the casing 12, and the cylindrical part 172 of the chip body 154 is inserted into the holding grooves 110 of the first and second blocks 70 and 72. The blood measurement chip 20 is held by the block portion 16 via the chip body 154. At this time, the hub 140 held inside the tip body 154 is held by the puncture unit 22 by fitting the small diameter portion 148 of the hub 140 to the hub gripping portion 150 constituting the puncture unit 22.

  Further, as shown in FIG. 8, the pressing pin 168 of the cap 164 attached to the blood measurement chip 20 is displaced toward the button unit 26 (in the direction of arrow A) along the guide grooves 118a and 118b. Then, it comes into contact with the end of the slide shaft 86 provided in the block portion 16 and presses it toward the button unit 26 (in the direction of arrow A). Thereby, the holder 64 is pressed toward the button unit 26 (in the direction of arrow A) against the elastic force of the guide spring 62 under the displacement action of the slide shaft 86, and the guide portion 78 of the holder 64 is also moved. By abutting and pressing the end of the guide groove 80a of the slider 80, the slider 80 and the yoke 66 are integrally displaced toward the button unit 26 side.

  Further, when the holder 64 is displaced to the button unit 26 side, the end surface of the holder 64 comes into contact with the flange 84a of the puncture unit 22, and the puncture unit 22 is displaced by pressing the flange 84a to the button unit 26 side. .

  As shown in FIG. 9, by further displacing the blood measurement chip 20 toward the button unit 26 (in the direction of arrow A), the guide block 170 of the chip body 154 is loaded into the opening 214 of the block section 16. Then, the end surface of the guide block 170 abuts on the rod cap 196. Then, the rod cap 196 is displaced along the rod hole 206 against the elastic force of the rod spring 198 under the pressing action of the tip body 154 (see FIG. 10). As a result, the end face of the chip body 154 comes into contact with the end face of the opening 214 in the first and second blocks 70 and 72, and the displacement of the blood measuring chip 20 is restricted. In other words, the blood measurement chip 20 is positioned in the axial direction with respect to the block portion 16, and the loading operation of the blood measurement chip 20 is completed.

  At this time, in the process in which the rod spring 198 is compressed in the axial direction under the pressing action by the blood measuring chip 20, the button unit 26 is placed in the engaging portion 208 of the stopper rod 194 under the elastic action of the rod spring 198. The pressing force toward the side (in the direction of arrow A) is urged, and the pressing force is urged to the stopper block 36 via the engaging portion 208. However, the stopper block 36 is engaged with the opening end portion of the block hole 34 through the recess 202, and the displacement (in the direction of the arrow C2) along the axial direction of the stopper block 36 is restricted, so that the stopper block 36 can be displaced. Absent. In other words, the stopper block 36 is restricted from being displaced toward the inner side of the casing 12 (in the direction of the arrow C2) under the engagement action with the block hole 34, and accordingly, the housing 14 and the block with respect to the casing 12 are restricted. The portion 16 is not relatively displaced along the axial direction.

  Further, when the pressing pin 168 of the cap 164 is further displaced together with the blood measurement chip 20, the slide shaft 86 is further pressed toward the button unit 26 (in the direction of arrow A) by the pressing pin 168. 64, the slider 80 and the yoke 66 are integrally displaced. Then, as shown in FIG. 11, the holder 64 rides on the arm portion 94 of the locking member 92 through the engaging recess 100, and the locking claw 98 of the arm portion 94 is in contact with the engaging recess 100. Engaged. Specifically, the locking claw 98 is engaged with the blood measurement chip 20 side (in the direction of arrow B) in the holder 64. As a result, the displacement of the holder 64 toward the blood measurement chip 20 is restricted, and the displacement of the slider 80 engaged with the guide portion 78 of the holder 64 and the yoke 66 connected to the slider 80 is also restricted simultaneously. Is done.

  The holder 64 displaces the puncture unit 22 toward the button unit 26, and the engagement recess 100 of the holder 64 engages with the locking claw 98, whereby the displacement of the puncture unit 22 is also restricted.

  That is, since the holder 64 is locked in a state against the elastic force of the guide spring 62 and the puncture spring 188, the slider 80 and the yoke 66 are connected to the blood measuring chip by the elastic force of the guide spring 62. The puncture unit 22 is locked in the charge state displaceable to the blood measurement chip 20 side by the elastic force of the puncture spring 188.

  Then, the mounting of the blood measuring chip 20 is completed, and the pressing force toward the button unit 26 (in the direction of arrow A), which was energized when the blood measuring chip 20 is mounted, is released, and FIG. As shown, the housing 14 and the block portion 16 are slightly displaced toward the blood measurement chip 20 side (in the direction of arrow B) under the elastic action of the second button spring 58 that has been compressed. Therefore, the concave portion 202 of the stopper block 36 is separated from the opening end portion of the block hole 34 in the casing 12, and the displacement restriction state of the stopper block 36 is released.

  When the pressing force applied to the blood measurement chip 20 is released, the elastic force of the rod spring 198 is caused by the fitting force between the bottom wall portion 116 of the second block 72 and the chip body 154 of the blood measurement chip 20. The blood measurement chip 20 is prevented from moving in the arrow B direction by the force.

  Subsequently, when the engaging portion 208 is pressed in contact with the rod groove 200 of the stopper block 36 by the elastic force of the rod spring 198, the stopper block 36 passes through the inclined surface of the rod groove 200. And slide along the inclined surface of the engaging portion 208. As a result, the stopper block 36 is displaced toward the inner side of the casing 12 (in the direction of the arrow C <b> 2) that is substantially orthogonal to the displacement direction of the engaging portion 208. At this time, the recess 202 of the pair of stopper blocks 36 is detached from the opening end of the mounting hole 112, and resists the elastic force of the block spring 192 toward the inside of the casing 12 (in the direction of arrow C2). Along with the displacement, it is displaced by a predetermined distance along the long hole 204 pivotally supported by the stopper pin 114. Note that the spring force of the rod spring 198 is set to be large in advance with respect to the spring force of the block spring 192. That is, the engaging portion 208 of the stopper rod 194 and the rod groove 200 of the stopper block 36 are engaged via an inclined surface, and the stopper block 36 is displaced under the pressing action of the stopper rod 194, whereby the stopper rod The displacement direction of 194 and the displacement direction of the stopper block 36 are substantially orthogonal.

  Thus, the locked state in which the relative displacement of the block portion 16 and the housing 14 with respect to the casing 12 by the stopper mechanism 24 is restricted is released, and the housing 14 and the block portion 16 can be displaced in the axial direction inside the casing 12. Become.

  Finally, as shown in FIGS. 13 and 14, the cap 164 attached to the contact portion 142 constituting the blood measurement chip 20 is removed so as to be separated from the corresponding contact portion 142. Further, the pressing pin 168 connected to the cap 164 is taken out along the guide grooves 118 a and 118 b of the block portion 16. At this time, since the slide shaft 86 connected to the holder 64 is locked to the housing 14 by the holder 64 being engaged with the locking member 92, the slide shaft 86 is displaced even when the cap 164 is taken out. There is nothing to do.

  Next, a brief description will be given of a case where the blood measurement chip 20 is mounted as described above and the measurer measures the blood component by the charged blood component measurement device 10.

  First, in the measurement preparation state shown in FIG. 14, a measurer (not shown) presses the contact portion 142 of the blood component measurement device 10 against the skin (for example, a fingertip) to compress the second button spring 58. By this operation, it is possible to secure a pressing force to the skin necessary for promoting the outflow of blood from the skin after puncturing. Next, the pressing portion 38 of the button unit 26 is pressed in this state. Thereby, the inclined portion 52 of the button member 46 presses the protrusion 96 of the locking member 92 downward, and the locking claw 98 of the locking member 92 is separated from the engagement recess 100 of the holder 64. The holder 64 is displaced toward the blood measurement chip 20 side (in the direction of arrow B) by the elastic force of the guide spring 62 compressed by the charge mechanism 28. Then, the puncture unit 22 locked by the holder 64 is displaced toward the blood measurement chip 20 side by the elastic force of the puncture spring 188, and the puncture needle 18 held at the distal end is the center of the contact member 138. The skin of the measurement person is punctured through the hole 156, and blood is derived from the puncture site of the skin punctured by the puncture needle 18.

  The puncture unit 22 is immediately displaced in a direction away from the skin (in the direction of arrow X2) by the elastic force of the return spring 186, and the puncture unit 22 balances the elastic force of the puncture spring 188 and the return spring 186. Return to position and stop.

  Even if the button member 46 is pushed in a state where the contact portion 142 is not pressed against the skin, that is, the second button spring 58 is not compressed, the inclined portion 52 of the button member 46 is not locked. Since it does not reach the projecting portion 96 of 92, it is designed so that the locked state cannot be released. According to such a structure, before the contact portion 142 is pressed against the skin, the button member 46 is pressed in advance, and the contact portion 142 is pressed against the skin while maintaining the state. It is also possible to adopt a usage method in which the locked state is automatically released when the button is pushed forward, and blood is measured by puncturing the skin.

  On the other hand, the guide portion 78 of the holder 64 is inserted into the insertion groove 90 of the yoke 66 under the displacement action of the holder 64, and the yoke 66 is integrally displaced. At this time, since the tooth portion 88 of the yoke 66 is meshed with the gear 102 of the damper mechanism 104, the displacement speed in the axial direction of the yoke 66 and the slider 80 connected to the yoke 66 is reduced, and the puncture unit Displacement to the blood measuring chip 20 side is slightly delayed from the skin puncture by 22.

  Just before the holder 64 comes into contact with the yoke 66, the puncture unit 22 is displaced to the maximum extent toward the blood measurement chip 20 to puncture the skin. When the holder 64 is integrated with the yoke 66, the puncture unit 22 The position of each member is adjusted so as to start returning to the button unit 26 side by the elastic force of the return spring 186. Further, the movement of the slider 80 in the axial direction is delayed because if the slider 80 moves simultaneously with the puncture of the skin, the contact member 138 is displaced before the puncture and punctures deeper than the setting, or during the puncture. This is to prevent the contact member 138 from being displaced and the puncture mark from becoming excessive, and also to ensure the time from blood puncture to the amount of blood necessary for measurement after the skin is punctured. .

  Then, as the slider 80 is displaced, the pair of rotating shafts 130 engaged with the protrusions 128 of the shaft hole 126 rotate by 90 ° in opposite directions, and the displacement restricting state of the contact member 138 by the presser 134 Is released. Accordingly, the corresponding contact member 138 is displaced obliquely upward along the second inclined surface 176 of the tip body 154 by the pressing force against the skin. Thereby, the introduction part 182 provided in the upper part of the tip body 154 is located at a position facing the center hole 156 of the contact member 138, and the introduction part 182 is close to the puncture site on the skin of the measurer. Therefore, blood that has bleed from the puncture site is sucked up into the introduction passage 182a by capillary action, and is introduced into the test paper 144 and reacts with the reagent impregnated in the test paper 144, depending on the sugar concentration in the blood. To color.

  Finally, the blood glucose level in the blood is measured by optically reading the change in the amount of reflected light based on the discoloration of the test paper 144 by the measuring unit 146.

  As described above, in the present embodiment, the slide shaft 86 constituting the charging mechanism 28 is provided inside the casing 12 so as to be displaceable, and between the holder 64 connected to the end of the slide shaft 86 and the housing 14. In addition, a set of guide springs 62 for urging the holder 64 and the slide shaft 86 toward the blood measurement chip 20 side (in the direction of arrow B) are provided.

  Then, by using the pressing force when the measurer attaches the blood measurement chip 20, the pressing pin 168 of the cap 164 attached to the blood measurement chip 20 is connected to the slide shaft 86 on the button unit 26 side (arrow). A pair of guide springs 62 are compressed via a holder 64 connected to the slide shaft 86.

  Further, when the holder 64 connected to the slide shaft 86 is displaced, the puncture spring 188 is compressed by abutting against and pressing the flange 84a provided on the button unit 26 side of the puncture unit 22.

  Since the charge mechanism 28 is directly driven through the cap 164 attached to the blood measurement chip 20 as described above, the charge mechanism 28 is configured by the pressing force applied to the blood measurement chip 20. Accordingly, the puncture spring 188 can be compressed based on the pressing force. Therefore, the driving force for displacing the puncture unit 22 toward the blood measurement chip 20 side in the puncture step can be reliably and easily charged by the charge mechanism 28.

  In addition, since the member that presses the charging mechanism 28 is configured separately from the blood measuring chip 20 including the puncture needle 18, when the blood measuring chip 20 is attached and charging is performed by the charging mechanism 28. The pressing force is not applied to the puncture needle 18, and the bending of the needle, which is a concern in the blood component measuring apparatus according to the prior art, does not occur. As a result, the measurer's puncturing process can be suitably performed via the puncture needle 18.

  Further, the blood pressure measuring chip 20 side of the slide shaft 86 is pressed by the pressing pin 168 until the measurer attaches the blood measuring chip 20 to the block portion 16 and removes the cap 164 from the blood measuring chip 20 ( Displacement in the direction of arrow B) is restricted. Therefore, when the blood measurement chip 20 is attached, the puncture unit 22 provided in the casing 12 does not operate by mistake. In addition, even when there is a problem with the blood measurement chip 20, it is possible to prevent the puncture needle 18 from firing.

  On the other hand, in the above description, the driving force for displacing the puncture unit 22 by the charge mechanism 28 and the driving force for displacing the contact member 138 using the pressing force when the blood measurement chip 20 is mounted. However, the mechanism for charging the driving force by the charge mechanism 28 is not limited to the puncture mechanism and the displacement mechanism for the contact member 138.

  For example, the blood component measuring apparatus 10 is provided with an eject mechanism (not shown) or an automatic spotting mechanism that can remove the blood measurement chip 20 after measurement, and the eject mechanism is charged by the charge mechanism 28. You may make it drive with the drive force which it has. That is, a driving force for driving a plurality of mechanisms may be charged by a single charging mechanism 28. In this case, a plurality of mechanisms may be driven simultaneously by a single operation, or the plurality of mechanisms may be driven separately and independently.

  Next, a puncture apparatus 250 according to an embodiment of the present invention is shown in FIGS. Note that the same components as those in the blood component measuring apparatus 10 according to the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  This puncture device 250 includes a cylindrical casing 252, a puncture unit 254 that can advance and retreat in the axial direction in the casing 252, and the puncture needle 18, and a puncture needle tip that is attached to the puncture unit 254. 256.

  As shown in FIGS. 15 to 17, the casing 252 includes a first body 260 having a mounting hole 258 in which a puncture needle chip 256 can be mounted, one end connected to the first body 260, and the other end. A second body 264 closed by a plug 262. The casing 252 is formed so that the insides of the first and second bodies 260 and 264 communicate with each other, and the puncture unit 254 is disposed in the inside so as to be freely displaceable.

  A first engagement protrusion 266 that faces the puncture unit 254 is formed on the inner wall surface of the first body 260. The first engaging protrusion 266 protrudes at a predetermined height toward the puncture unit 254 side.

  Further, the first body 260 is provided with a puncture button 268 that is spaced apart from the outer peripheral surface of the first body 260 in the radially outward direction and is substantially parallel to the first body 260. The other end portion is provided so as to be tiltable by a predetermined angle toward the inside of the first body 260. An opening 270 facing the puncture button 268 is formed on the outer peripheral surface of the first body 260, and the other end of the tilted puncture button 268 is inserted into the first body 260 through the opening 270. Inserted. In other words, puncture button 268 faces puncture unit 254 provided in first body 260 through opening 270.

  At the other end of the puncture button 268, a protrusion 272 that protrudes toward the puncture unit 254 is formed. The protrusion 272 releases the displacement restriction state along the axial direction of the puncture unit 254 by pressing the knob 274 of the puncture unit 254 while the puncture button 268 is tilted.

  On the other hand, the second body 264 is provided with a recharge lever 276 that displaces the puncture unit 254 away from the puncture needle tip 256 (arrow A direction), and the recharge lever 276 has a puncture needle tip 256 side (arrow). A return spring 186 is interposed at the end that becomes the (B direction).

  The puncture unit 254 is formed with a hub grip 280 capable of gripping the hub 140 having the puncture needle 18 at one end, and a return spring 186 interposed between the other end and the recharge lever 276. A flange 282 is formed. In addition, a second flange 284 is formed at a substantially central portion of the puncture unit 254, and a puncture spring 188 is interposed between the end of the second body 264.

  The puncture unit 254 is provided with an elastic portion 286 that can tilt in the direction of the central axis of the casing 252, and the elastic portion 286 extends along the axial direction of the puncture unit 254, and other than the puncture unit 254. Tilt displacement is performed with the end side (arrow A direction) as a fulcrum. The elastic portion 286 includes a knob 274 that faces the puncture button 268 of the casing 252 and protrudes toward the puncture button 268, and a second engagement protrusion 288 that is spaced apart from the knob 274 by a predetermined distance. It is formed.

  Further, between the first flange 282 and the second flange 284, a protruding piece 290 that functions as a retaining member when the puncture unit 254 is protruded toward the puncture needle tip 256 side (arrow B direction) is formed. The Displacement along the axial direction of the puncture unit 254 is restricted by the protruding piece 290 coming into contact with the end surface of the second body 264 constituting the casing 252.

  The puncture needle tip 256 includes a hub 140 that holds the puncture needle 18 and a hub holder 278 that holds the hub 140, and a cap 292 is attached to the hub holder 278.

  The hub 140 has the puncture needle 18 protruding at the tip, and is held by fitting a diameter-enlarged portion 140 a radially expanded in a second fitting hole 296 described later of the hub holder 278.

  The hub holder 278 is formed in a cylindrical shape, and has a first fitting hole 294 formed along the axial direction on one end side and a diameter larger than the first fitting hole 294 and formed on the other end side. A second fitting hole 296. The end portion of the hub 140 is held in a state where the puncture needle 18 is inserted into the first fitting hole 294, and the enlarged diameter portion 140a is fitted into the second fitting hole 296. As a result, the hub 140 is fitted and held inside the hub holder 278.

  A cap 292 is attached to one end of the hub holder 278, and the cap 292 is in contact with one end of the hub holder 278 and substantially parallel to the axis of the hub holder 278 with respect to the sealing portion 298. The pin portion 300 extends. The sealing portion 298 has a substantially circular cross section so as to cover the end portion of the hub holder 278. That is, a part of the first fitting hole 294 and the second fitting hole 296 is sealed by the sealing part 298 and the fitted enlarged diameter part 140a, or at least sealed with bacteria impermeable. Therefore, the sterilized state of the puncture needle 18 inserted into the first fitting hole 294 is suitably maintained.

  The pin portion 300 is provided along the outer surface of the hub holder 278, and is inserted into the casing 252 together with the hub holder 278 when the puncture needle tip 256 is attached to the casing 252.

  In addition, the pin part 300 which is provided in the cap 292 and presses the puncture unit 254 toward the second body 264 side (arrow A direction), the puncture unit 254 toward the puncture needle tip 256 side (arrow B direction). It functions as a charging mechanism for charging the driving force for displacement.

  Next, a case where the puncture needle tip 256 is attached to the casing 252 in the puncture device 250 will be described.

  In a state before the puncture needle tip 256 and the cap 292 shown in FIG. 17 are attached to the casing 252, the second engagement protrusion 288 of the puncture unit 254 contacts the first engagement protrusion 266 of the casing 252. The puncture unit 254 is in a state of being freely displaced along the axial direction.

  Then, as shown in FIG. 18, by inserting the puncture needle tip 256 and the cap 292 into the casing 252 through the mounting hole 258 of the casing 252, the hub 140 is attached to the hub grip 280 of the puncture unit 254. The pin portion 300 of the cap 292 comes into contact with the puncture unit 254 by further pressing the puncture needle tip 256 and the cap 292 toward the puncture unit 254 (in the direction of arrow A) (see FIG. 19). The entire puncture unit 254 is pressed toward the second body 264 (in the direction of arrow A). At this time, since the puncture unit 254 is displaced while the puncture spring 188 is retracted, the puncture spring 188 is in a compressed state.

  Then, as shown in FIG. 20, the second engagement protrusion 288 of the elastic portion 286 is displaced along the first engagement protrusion 266 of the casing 252 and gets over the first engagement protrusion 266. The first engagement protrusion 266 is displaced toward the second body 264 (in the direction of arrow A). At this time, after the elastic portion 286 gets over the first engagement protrusion 266 by its elastic force, the second engagement protrusion 288 is urged toward the inner wall surface side of the casing 252, and the second The engagement protrusion 288 and the first engagement protrusion 266 are engaged in the axial direction. Thereby, the relative displacement along the axial direction with respect to the casing 252 of the puncture unit 254 is controlled. At this time, the knob 274 of the puncture unit 254 is in a state of being in contact with and facing the protrusion 272 of the puncture unit 254 in the casing 252.

  That is, the puncture unit 254 is locked in a state (charged state) in which the elastic force of the compressed puncture spring 188 is applied toward the puncture needle tip 256 side (arrow B direction).

  Finally, as shown in FIG. 21, by removing the cap 292 attached to the hub holder 278 constituting the puncture needle tip 256 so as to be separated from the end of the hub holder 278, the skin of the measurer can be punctured. Ready for puncture. At this time, the puncture unit 254 is not displaced because the second engagement protrusion 288 is engaged with the first engagement protrusion 266 and displacement in the axial direction is restricted.

  Then, in puncture device 250 to which puncture needle tip 256 is attached, puncture button 268 is pressed in a state where the end of hub holder 278 is pressed against the skin (for example, fingertip) of a not-shown measurer. As a result, the protrusion 272 of the puncture button 268 presses the knob 274 of the elastic part 286 of the puncture unit 254 toward the puncture unit 254, and the elastic part 286 bends, whereby the first engagement protrusion 266 and the second engagement protrusion 266 are bent. The engagement with the engagement protrusion 288 is released. As a result, the puncture unit 254 is displaced toward the puncture needle tip 256 (in the direction of arrow B) under the elastic action of the puncture spring 188, and the measurer is punctured by the puncture needle 18.

  That is, in the puncture device 250, when the measurer wears the puncture needle tip 256, the pin portion 300 of the cap 292 attached to the puncture needle tip 256 uses the pressing force to cause the puncture unit 254 to protrude. The puncture spring 188 is compressed by being displaced to the second body 264 side (arrow A direction) via 302. Thus, since the puncture unit 254 is displaced directly via the cap 292, the pressing force applied to the cap 292 is directly transmitted to the puncture unit 254, and the puncture spring 188 can be reliably compressed. . As a result, the driving force for displacing the puncture unit 254 toward the puncture needle tip 256 can be reliably and easily charged.

  In addition, since the pin portion 300 of the cap 292 constituting the charging mechanism is configured separately from the puncture needle tip 256 containing the puncture needle 18, when the puncture needle tip 256 is attached and charging is performed, The pressure does not act on the puncture needle 18.

  Further, when the puncture needle tip 256 is attached to the casing 252, the pin unit 300 causes the puncture unit 254 to be displaced toward the puncture needle tip 256 (arrow B direction) until the cap 292 is removed from the puncture needle tip 256. Due to the restriction, the puncture unit 254 is not moved to the puncture needle tip 256 side by mistake.

  Further, since the cap 292 is removed when the puncture needle tip 256 is used, the urging means is charged even if the puncture needle tip 256 with the cap 292 removed after use is attached to the puncture device 250 again. Therefore, reuse of the used puncture needle tip 256 can be prevented.

  Of course, the puncture device and blood component measurement device according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

1 is an overall perspective view showing a blood component measuring device and a blood measuring chip according to an embodiment of the present invention. FIG. 2 is a partially cutaway perspective view of the blood component measurement device of FIG. 1. FIG. 2 is a partially exploded perspective view of the blood component measurement device in FIG. 1. FIG. 2 is an exploded perspective view of the blood measurement chip in FIG. 1. FIG. 2 is a schematic cross-sectional view showing the blood component measurement device and blood measurement chip of FIG. 1. It is a longitudinal cross-sectional view which shows the blood component measuring apparatus and blood measurement chip | tip of FIG. FIG. 2 is a schematic cross-sectional view showing a state in which a blood measurement chip is inserted halfway into the blood component measurement device of FIG. 1. It is a longitudinal cross-sectional view which shows the blood component measuring apparatus shown in FIG. FIG. 8 is a schematic cross-sectional view showing a state where the blood measurement chip of FIG. 7 is further pushed into the block portion side. FIG. 10 is a schematic cross-sectional view showing a state where the blood measurement chip of FIG. 9 presses the rod cap of the stopper mechanism and the rod spring is compressed. It is a longitudinal cross-sectional view of the blood component measuring device shown in FIG. FIG. 11 is a schematic cross-sectional view showing a state in which the stopper block is displaced from the block hole of the casing to the inside side under the elastic action of the rod spring, and the locked state of the block portion with respect to the casing is released in the blood measuring device of FIG. 10. . FIG. 13 is a schematic cross-sectional view showing a state where the cap attached to the contact mechanism is detached in the blood measurement device of FIG. 12. It is a longitudinal cross-sectional view of the blood component measuring device shown in FIG. It is the whole puncture device perspective view showing the state where the puncture needle tip concerning an embodiment of the invention was removed. FIG. 16 is a partially cutaway perspective view of the puncture device of FIG. 15. It is a schematic longitudinal cross-sectional view which shows the state before a puncture needle chip | tip is mounted | worn with respect to the puncture apparatus of FIG. FIG. 18 is a schematic longitudinal sectional view showing a state where the hub of the puncture needle tip is held by the puncture unit in the puncture device of FIG. 17. In the puncture device of FIG. 18, it is a schematic longitudinal cross-sectional view which shows the state which the pin part of the cap with which the puncture needle chip was mounted | worn contacted the edge part of the puncture unit. In the puncture device of FIG. 19, the puncture unit is pressed by the pin portion of the cap, and shows a locked state in which the displacement of the puncture unit toward the puncture needle tip side is regulated via the first and second engagement protrusions. It is a schematic longitudinal cross-sectional view. FIG. 21 is a schematic longitudinal sectional view showing a state in which the cap attached to the puncture needle chip is detached after the puncture needle chip mounting operation is completed in the puncture device of FIG. 20. It is a partial cross section top view of the sensor containing the lancet with which the blood component measuring device which concerns on a prior art is mounted | worn. It is a longitudinal cross-sectional view of the blood component measuring device which shows the state with which the lancet of FIG. 22 was mounted | worn.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Blood component measuring device 12, 252 ... Casing 14 ... Housing 16 ... Block part 18 ... Puncture needle 20 ... Blood measuring chip 22, 254 ... Puncture unit 24 ... Stopper mechanism 26 ... Button unit 28 ... Charge mechanism 36 ... Stopper block 46 ... Button member 64 ... Holder 66 ... Yoke 80 ... Slider 84, 278 ... Hub holder 86 ... Slide shaft 92 ... Locking member 130 ... Rotating shaft 132 ... Shaft portion 134 ... Pressing portion 136 ... Twist groove 138 ... Contact member 140 ... Hub 142 ... Abutting part 144 ... Test paper 146 ... Measuring part 154 ... Chip body 164, 292 ... Cap 168 ... Pressing pin 182 ... Introduction part 186 ... Return spring 188 ... Puncture spring 192 ... Block spring 194 ... Stopper rod 196 ... Rod cap 98 ... rod spring 202 ... recess 208 ... engaging portion 250 ... lancing device 256 ... puncture needle chip 268 ... puncturing button 298 ... sealing portion 300 ... pin portion

Claims (9)

In a puncture device used by attaching a puncture needle tip provided with a puncture needle that can advance and retract in the axial direction in a housing
A casing,
A puncture unit that is displaceably provided in the casing and holds the puncture needle;
Biasing means for storing a biasing force for moving the puncture unit toward the puncture site of the skin,
A cap having a contact portion for allowing the puncture needle tip to contact the periphery of the skin puncture site, a cover portion covering the contact portion, and a shaft portion extending from the cover portion toward the casing; ,
With
The puncture device according to claim 1, wherein when the puncture needle tip provided with the cap is mounted on the casing, the biasing means is charged by the shaft portion of the cap pressing the puncture unit. The puncture device according to claim 1, wherein
A displacement member provided in the casing so as to be displaceable and capable of coming into contact with the puncture unit. When the puncture needle tip provided with the cap is mounted on the casing, the shaft portion of the cap presses the displacement member. Further, the urging device is charged by the displacement member pressing the puncture unit. The puncture device according to claim 1 or 2,
Locking means for locking the puncture unit or the displacement member in a state where the biasing means is charged,
Release means for releasing the locking state of the locking means;
A puncture device comprising: In a blood component measuring apparatus used by mounting a blood measuring chip equipped with a puncture needle that can advance and retract in the axial direction in a housing,
A casing,
A puncture unit that is displaceably provided in the casing and holds the puncture needle;
First urging means for storing an urging force for displacing the puncture unit toward the puncture site of the skin,
The blood measuring chip has a contact part for contacting the periphery of the puncture site of the skin, a cover part covering the contact part, and a shaft part extending from the cover part toward the casing side And
The blood component measuring device is characterized in that when the blood measuring chip having the cap is mounted on the casing, the first urging means is charged by the shaft portion of the cap pressing the puncture unit. . The blood component measurement apparatus according to claim 4,
A displacement member provided in the casing so as to be displaceable and capable of engaging with the puncture unit;
When the blood measuring chip having the cap is attached to the casing, the shaft portion of the cap presses the displacement member, and the displacement member presses the puncture unit, whereby the first urging means is A blood component measuring device that is charged. The blood component measuring apparatus according to claim 4 or 5,
Locking means for locking the puncture unit or the displacement member in a state where the first biasing means is charged;
Release means for releasing the locking state of the locking means;
A blood component measuring apparatus comprising: In the blood component measuring device according to any one of claims 4 to 6,
The blood component measuring apparatus, wherein when the blood measuring chip including the cap is attached to the casing, the shaft portion of the cap charges a plurality of biasing means via the displacement member. The blood component measurement apparatus according to any one of claims 4 to 7,
The blood measurement chip has a reagent part that reacts with blood components and a blood introduction part for guiding blood to the reagent part,
A release mechanism for releasing the state in which the displacement of the contact portion relative to the blood introduction portion is restricted in order to bring the blood introduction portion closer to the puncture site after puncturing the skin by the first biasing means;
Second urging means for storing an urging force for operating a release mechanism for releasing the displacement restricting means of the abutting portion;
With
The blood component measuring apparatus according to claim 1, wherein the first urging means and the second urging means are simultaneously charged when the blood measuring chip having the cap is attached to the casing. The blood component measurement apparatus according to any one of claims 4 to 8,
In the blood measuring chip, the cover portion of the cap seals the opening at one end of the housing, and the enlarged diameter portion of the hub that holds the puncture needle is in circumferential contact with the inner surface of the housing. A blood component measuring apparatus, wherein the puncture needle is sealed in a sterilized state.

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