JP2005131009A - Liquid extractor and piercing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform manufacture advantageously in terms of costs and to appropriately sample body fluids such as blood by a simple operation at a low running cost. <P>SOLUTION: The subject liquid extractor 4 for squeezing out the blood from the skin of an incised fingertip comprises a housing part 40 having a housing space 40a for inserting the fingertip 10 and an acting part 41 projected in the housing space 40a for making force turned to an insertion direction act on the fingertip 10 when detaching the fingertip 10 inserted to the housing part 40. Preferably, the acting part 41 is constituted such that detachment resistance when detaching the fingertip from the housing part 40 is larger than insertion resistance when inserting the fingertip to the housing part 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for collecting body fluid from skin.

  When blood is collected from the skin, a puncture device configured to pierce the skin with a needle is used. In the puncture device, various methods are employed in order to promote blood discharge. As a typical example, there is a method in which negative pressure is applied to the skin using a pump incorporated in the puncture device, and the blood is raised to collect blood (see, for example, Patent Document 1), or a method in which a finger is pressed to cause congestion. (For example, see Patent Documents 2-4).

  However, in the method of applying a negative pressure, it is necessary to incorporate an electric or manual pump in the puncture device. Therefore, in the method using an electric pump, the apparatus is increased in size and weight by the pump and the drive source of the pump. As a result, the puncture device employing the electric pump is not portable. Moreover, if the pump is driven by a drive source, the power consumption increases and the running cost increases. On the other hand, in the method using a manual pump, the construction of the apparatus becomes complicated by providing a pump mechanism for generating negative pressure, resulting in an increase in manufacturing cost. The user is forced to perform troublesome operations to operate the pump mechanism.

  In addition, in the method of applying a negative pressure regardless of the electric type or the manual type, air flows into the tip of the puncture device unless the tip of the puncture device is properly pressed against the skin. In addition, air flows into the tip of the puncture device due to the presence of hair between the tip of the puncture device and the skin. As a result, the method of applying a negative pressure has a problem that the negative pressure cannot be appropriately applied to the skin unless any measures are taken.

  On the other hand, as a method of pressing a finger, a method is used in which a cuff and a driving source are provided in the puncture device, and the finger is pressed by injecting air into the cuff by the driving source. For this reason, the cuff and the drive source increase the size and weight of the device, resulting in poor portability. Further, since power for driving the cuff is necessary, power consumption and thus running cost increase.

JP-T-2001-515377 JP-A-9-89885 Japanese Patent Laid-Open No. 9-313465 Japanese Patent Laid-Open No. 10-5199

  An object of the present invention is to be able to produce a bodily fluid such as blood appropriately by a simple operation with a low running cost, which can be advantageously manufactured in terms of cost.

  According to a first aspect of the present invention, there is provided a squeezing tool for squeezing body fluid from an incised fingertip, a storage portion having a storage space for inserting a fingertip, and protruding in the storage space, and the storage There is provided a liquid squeezing tool comprising: an action part for applying a force directed to the fingertip in the insertion direction when the fingertip inserted into the part is withdrawn.

  The liquid squeezing tool of the present invention is configured to be used by being attached to a puncture device for incising the skin by piercing the skin with a puncture element, for example. In this case, in the liquid squeezing tool, body fluid is squeezed by applying a force to the fingertip by the action part after incising the skin of the fingertip with the puncture device. Of course, the liquid squeezing tool of the present invention can also be used without being attached to the puncture device. That is, body fluid can also be squeezed from the fingertip by previously incising the fingertip of the skin and then removing it after inserting the fingertip into the squeezing tool.

  According to a second aspect of the present invention, there is provided a device body for piercing a skin with a puncture element and incising the skin, and a squeezing tool for squeezing body fluid from the incised fingertip. A puncture device is provided.

  The squeezing tool is, for example, a force that is directed toward the insertion direction with respect to the fingertip when removing the fingertip inserted into the main body portion and the accommodating portion having an accommodating space for inserting the fingertip. It is comprised as an operation part for making this act. The squeezing tool is preferably configured to be detachable from the apparatus main body.

  It is preferable that the action part of the present invention is configured such that the removal resistance when the fingertip is removed from the accommodation part is larger than the insertion resistance when the fingertip is inserted into the accommodation part.

  For example, when the fingertip is inserted into the accommodating portion, the action portion is configured to be able to bend so that the insertion resistance is reduced. An example of such an action part is a leaf spring. The leaf spring may be integrally formed with the housing portion, or may be fixed to the housing portion after being formed as a separate body.

  The action part can also be configured as having a first opening located on the removal direction side and a second opening located on the insertion direction side and having a smaller diameter than the first opening. In this case, it is preferable that the second opening is configured to have a larger diameter when the fingertip is inserted. Such a 2nd opening part can be formed by comprising the whole effect | action part as elastic bodies, such as rubber | gum, for example.

  The accommodating portion is configured to have a through hole corresponding to a liquid discharge site on the fingertip, for example.

  In the puncture device according to the present invention, after incising the skin of the fingertip by the puncture element, body fluid may be squeezed by applying a force to the fingertip by the action part of the squeezing tool, or the squeezing tool The body fluid can also be squeezed from the fingertip by removing the fingertip from the squeezing tool after the skin of the fingertip is incised by the puncture element in a state where force is applied to the fingertip by the action portion.

  In the following, the present invention will be described based on the first and second embodiments.

  First, a first embodiment of the present invention will be described. A puncture device 1 shown in FIGS. 1 and 2 is used with a lancet 2 mounted thereon, and includes a device body 3 and a squeezing tool 4.

  The apparatus main body 3 includes a housing 30 and a puncture mechanism 5.

  The housing 30 accommodates various elements to be described later, and a pair of guide portions 31 are provided on the upper portion thereof. Each guide portion 31 is formed as a groove extending in the directions of arrows N ′ and N ″. This guide portion 31 is for engaging a guide portion 42 of the squeezing tool 4 to be described later, and the apparatus main body. 3 is used when the squeezing tool 4 is attached to 3.

  As shown in FIGS. 1 and 3, the puncture mechanism 5 is for puncturing the fingertip 10 held in the accommodation space 40a of the liquid squeezing tool 4, and includes a housing 50, a lancet holder 51, and an action portion 52. Have.

  The housing 50 is for housing the lancet 2 and the lancet holder 51. The housing 50 has an opening 53, a through hole 54, and a pair of stepped portions 55.

  As shown in FIGS. 2 and 3, the opening 53 is used when the lancet 2 is inserted, and has a notch 53 a. The notch 53a is for engaging a convex portion 22C of the lancet 2 described later.

  As shown in FIGS. 1 and 3, the through hole 54 is a portion for allowing movement of an engaging portion 51 a of a lancet holder 51 to be described later and locking the engaging portion 51 a at the peripheral portion 54 a. .

  The pair of step portions 55 is for applying a pressing force to the accommodating portion 22 of the lancet 2 described later, and protrudes toward the inside of the housing 50. The pair of stepped portions 55 are formed such that upper portions in FIG. 3 are tapered.

  The lancet holder 51 is for holding the lancet 2. The lancet holder 51 is provided with an engaging portion 51a and a flange portion 51b. The engaging portion 51 a is formed in a hook shape that can be engaged with the peripheral portion 54 a of the through hole 54 of the housing 50. A coil spring 57 is disposed between the flange portion 51 b and the peripheral portion 54 a of the through hole 54. The coil spring 57 is in a compressed state when the engaging portion 51 a is engaged with the peripheral portion 54 a of the through hole 54. Therefore, if the state where the engaging portion 51a is engaged with the peripheral portion 54a of the through hole 54 is released, the elastic force of the coil spring 57 acts on the flange portion 51b, and the lancet holder 51 is moved in the arrow N1 direction. A coil spring 58 is disposed between the flange portion 51 b and the step portion 55. The coil spring 58 is compressed when the lancet holder 51 is moved in the direction of the arrow N1, and is used to move the lancet holder 51 in the direction of the arrow N2 by applying the elastic force at that time to the flange portion 51b. Is. However, the coil spring 58 may be omitted.

  The action part 52 is for releasing the state in which the engaging part 51a of the lancet holder 51 is engaged with the peripheral part 54a of the through hole 54, and is movable in the directions of arrows N ′ and N ″. That is, when the action portion 52 is moved in the direction of the arrow N ″, the action portion 52 interferes with the engagement portion 51 a to exert a pressing force on the engagement portion 51 a, and the engagement portion 51 a is applied to the peripheral portion 54 a of the through hole 54. The engaged state can be released. The action portion 52 is controlled to move in the directions of the arrows N ′ and N ″ by the control means 59. Of course, the action portion 52 can be manually moved.

  On the other hand, as shown in FIGS. 1 and 2, the liquid squeezing tool 4 is detachable from the apparatus main body 3 and includes a main body 40, an action part 41, and a guide part 42.

  The main body 40 includes an accommodation space 40a for accommodating a fingertip, an opening 40b for inserting / removing the fingertip 10 into / from the accommodation space 40a, and a fingertip 10 inserted into the accommodation space 40a. A through hole 40c is provided for exposure.

  As shown in FIG. 4, the action part 41 is for applying a force in the direction of the arrow N ″ to the fingertip when the fingertip 10 is extracted from the accommodation space 40a. 41 is configured as a leaf spring, and is configured such that the movement resistance acting on the fingertip 10 is greater when the fingertip 10 is extracted from the accommodation space 40a than when the fingertip is inserted into the accommodation space 40a. The action part 41 can be formed by, for example, bending a metal plate, and the action part 41 is integrated with the main body part 40 by insert molding, for example. May be integrally molded with the housing portion.

  As shown in FIGS. 1 and 2, the guide portion 42 is configured as a convex portion extending in the directions of arrows N ′ and N ″, and is for engaging with the guide portion 31 of the apparatus main body 3.

  As shown in FIGS. 2 and 3, the lancet 2 is used by being inserted into the housing 50 in the apparatus main body 3. As shown in FIGS. 5 to 7, the lancet body 20, the cap part 21, the accommodating part 22, and the biosensor 23 are provided.

  The lancet body 20 includes a puncture needle 20a, a protection portion 20b that covers the end of the puncture needle 20a on the needle tip side, and a holding portion 20c in which an end opposite to the needle tip of the puncture needle 20a is embedded. . A notch 20d is formed between the protection part 20b and the holding part 20c, and the protection part 20b and the holding part 20c can be separated at the notch 20d. A recess 20e is formed in the protection part 20b. The recess 20e is for fitting an engagement support portion 21a of the cap portion 21 described later.

  As shown in FIGS. 6 to 8, the cap portion 21 is detachably held with respect to the housing portion 22, and supports the lancet body 20 on the protection portion 20c via the engagement support portion 21a. ing. Therefore, when separating the cap part 21 from the accommodating part 22, the protection part 20c can be separated in the lancet body 20 to expose the puncture needle 20a.

  As shown in FIGS. 5 to 7, the accommodating portion 22 is for holding the lancet body 20 and the biosensor 23 and is formed in a cylindrical shape as a whole. The accommodating portion 22 has three pairs of convex portions 22Aa, 22Ab, 22B, and 22C.

  As shown in FIGS. 7 and 9, the pair of convex portions 22Aa and 22Ab are for bringing the lancet body 20 into close contact with the holding portion 20c, and on the inner surface 22a of the accommodating portion 22, the first diameter axis D1 is provided. It is provided along. As shown in FIGS. 7 and 10, a support portion 22E for supporting the biosensor 23 extends from the convex portion 22Aa. The support portion 22E includes a spring portion 22Ea that functions as a leaf spring and a placement portion 22Eb on which the biosensor 23 is placed. The mounting portion 22Eb is provided with a notch 22Ec. As indicated by phantom lines in FIG. 14, the inner surface 22Ed of the notch 22Ec is in contact with the protection portion 20c of the lancet body 20 with the placement portion 22Eb positioned slightly outward from the natural state. . In addition, the inner surface 22Ed of the notch 22Ec is positioned in a natural state when the puncture needle 20a is exposed by separating the protective portion 20c in the lancet body 20. At this time, a gap is provided between the inner surface 22Ed of the notch 22Ec and the puncture needle 20a.

  As shown in FIGS. 3 and 6, the pair of convex portions 22 </ b> B is for interfering with the stepped portion 55 of the housing 50 in the apparatus main body 3, and at a position below the outer surface 22 b of the accommodating portion 22, FIG. As shown in FIG. 5, the second diameter axis D2 is provided side by side along the second diameter axis D2 orthogonal to the first diameter axis D1.

  As shown in FIGS. 9 and 13, the pair of convex portions 22 </ b> C is provided on the first diameter axis D <b> 1 at the upper position of the outer surface 22 b of the accommodating portion 22. The convex portion 22 </ b> C is for engaging with the notch 53 a in the opening 53 when the lancet 2 is inserted into the housing 50 of the apparatus body 3. That is, the convex portion 22 </ b> C is used for positioning when the lancet 2 is inserted into the housing 50.

  Such an accommodating part 22 is formed so that the whole can be elastically deformed by resin molding, for example. For this reason, as shown in FIG. 12 and FIG. 13, when a force directed inward along the second diameter axis D2 is applied to the pair of convex portions 22B, at least a pair of The accommodating part 22 deform | transforms in the part in which the convex part 22B was provided. Thereby, while the distance between the pair of convex portions 22B is reduced, the distance between the pair of convex portions 22A is increased and a gap is formed between the pair of convex portions 22A and the lancet body 20. As a result, the lancet body 20 can move relative to the accommodating portion 22 in the directions of arrows N1 and N2.

  The biosensor 23 shown in FIGS. 14 to 17 is configured to move blood by capillary force and to measure the concentration of a specific component in blood, such as glucose, by an electrode method. More specifically, the biosensor 23 includes a substrate 23a, a pair of spacers 23b, and a cover 23c, and includes a capillary 23d defined by these elements 23a to 23c.

  A counter electrode 23e, a working electrode 23f, and a reagent part 23g are provided on the surface of the substrate 23a. The counter electrode 23e and the working electrode 23f are parts for conducting to an analysis circuit (not shown) in the apparatus main body 3 via a terminal 35, as can be understood by referring to FIG. The reagent part 23g is formed so as to connect the working electrode 23e and the counter electrode 23f, and includes, for example, an oxidoreductase and an electron transfer substance.

  The pair of spacers 23b are for defining the width dimension and the height dimension of the capillary 23d, and are arranged on the surface of the substrate 23a at intervals so as to sandwich the reagent part 23g. These spacers 23b are made of double-sided tape, for example.

  The biosensor 23 is provided with a semicircular cutout 23h, as clearly shown in FIGS. This notch 23h is for allowing the puncture needle 20a to move when the lancet body 20 is moved in the direction of the arrow N1, and in this notch 23h, an opening 23j for introducing blood into the capillary 23d is opened. doing. The biosensor 23 is fixed to the mounting portion 22Eb at a position where the notch 23h corresponds to the notch 22Ec in the mounting portion 22Eb. Therefore, when the mounting portion 22Eb is in a natural state, a gap is provided between the notch 23h and the puncture needle 20a.

  As shown in FIGS. 2 and 3, in the puncturing operation using the puncture device 1, the squeezing tool 4 is first removed, and the lancet 2 is attached to the housing 50 through the opening 53 of the housing 50. insert. As shown in FIGS. 18A and 18B, the insertion of the lancet 2 is performed while the convex portion 22C of the lancet 2 is aligned with the notch 53a of the housing 50 (see FIG. 13). This can be done by pushing the lancet 2 into 50.

  When the lancet 2 is pushed into the housing 50, the holding portion 20 c of the lancet body 20 is fitted into the lancet holder 51, while the convex portion 22 </ b> B of the housing portion 22 interferes with the step portion 55 of the housing 50. Thereby, as shown in FIG. 12 and FIG. 13, the housing portion 22 is deformed, and the lancet body 20 can be moved relative to the housing portion 22. At this time, since the holding portion 20 c of the lancet body 20 is fitted into the lancet holder 51, the lancet body 20 can move together with the lancet holder 51. Further, when the lancet 2 is inserted into the housing 50, the lancet holder 51 can be moved in the direction of the arrow N2, and the engaging portion 51a of the lancet holder 51 can be engaged with the peripheral portion 54a of the through hole 54 in the housing 50. . As a result, the coil spring 57 is compressed, and an elastic force is stored in the coil spring 57. Of course, the engaging portion 51 a of the lancet holder 51 may be engaged with the peripheral portion 54 a of the through hole 54, separately from the operation of holding the lancet 2. That is, before the lancet holder 51 holds the lancet 2, the engaging portion 51 a may be engaged with the peripheral portion 54 a of the through hole 54.

  Next, as shown in FIGS. 8, 18 (b) and 18 (c), the cap portion 21 is removed from the lancet 2. At this time, as clearly shown in FIG. 8, since the engagement support portion 21a of the cap portion 21 is fitted in the recess 20e of the protection portion 20b in the lancet body 20, when removing the cap portion 21, In the lancet 2, the protection part 20b is pulled out. As a result, the needle tip is exposed. At this time, as shown in FIG. 12, the biosensor 23 is displaced to a notch 23h, that is, a position with a slight gap between the opening 23j and the needle tip of the puncture needle 20a, and see FIG. As can be seen, the working electrode 23 e and the counter electrode 23 f of the biosensor 23 are in contact with a terminal 35 provided in the apparatus main body 3. In this state, a voltage can be applied between the working electrode 23e and the counter electrode 23f, and the amount of electrons supplied to the working electrode 23e can be measured as a current value.

  Next, the squeezing tool 4 is attached to the apparatus main body 3, and the fingertip 10 is inserted into the accommodation space 40a (see FIGS. 1 and 2). The squeezing tool 4 is mounted by engaging the guide part 42 of the squeezing tool 4 with the guide part 31 of the apparatus main body 3 (see FIGS. 1 and 2).

  Next, as shown in FIGS. 19A to 19C, the lancet body 20 is moved in the direction of the arrow N1, and the puncture needle 20a is pierced into the puncture target site 10a in the fingertip 10. The movement of the lancet body 20 is performed by moving the action part 52 in the direction of the arrow N ″ in the drawing to cause the action part 52 to interfere with the engagement part 51 a and releasing the state where the lancet holder 51 is engaged with the housing 50. When the engaged state of the lancet holder 51 is released, the lancet holder 51 moves in the direction of the arrow N1 together with the lancet body 20 by the elastic force of the coil spring 57, and the puncture needle 20a of the lancet body 20 moves to the puncture target site. Pierce 10a.

  As shown in FIG. 19 (c), when the puncture needle 20a pierces the puncture target site 10a, the puncture target site 10a in the fingertip 10 is incised, and blood is discharged. At this time, since a slight gap is provided between the puncture needle 20a and the opening 23j of the biosensor 23, the biosensor 23 does not impede blood outflow. As shown in FIGS. 19 (c) and 19 (d), after the puncture needle 20a is pierced into the puncture target site 10a, the lancet holder 51 is retracted by the elastic force of the coil springs 57, 58, and the puncture needle 20a. Is immediately withdrawn from the fingertip 10. Thereafter, the fingertip 10 is extracted from the accommodation space 40a (see FIGS. 1 and 4). At this time, as shown in FIG. 4, the action portion 41 of the squeezing tool 4 is caught on the base side of the fingertip 10 relative to the puncture target site 10 a, and the fingertip 10 has a pressing force directed in the direction of the arrow N ″. As a result, blood is squeezed out from the puncture target site 10a, and sufficient blood can be discharged to measure the blood in the biosensor 23. The blood is discharged.

  As shown in FIG. 20 (a), the blood B discharged from the puncture target site 10a reaches the opening 23j of the biosensor 23. Since a slight gap is provided between the puncture needle 20a and the opening 23j of the biosensor 23, the blood discharged from the skin is appropriately blocked with respect to the opening 23j without being blocked by the puncture needle 20a. To be introduced. In the biosensor 23, as shown in FIGS. 20A to 20C, the blood B moves inside the capillary 23d by the capillary force generated in the capillary 23d. At this time, the reagent part 23g is dissolved by the blood B, and a liquid phase reaction system is constructed inside the capillary 23d. In the liquid phase reaction system, electrons are taken out from a specific component in blood, such as glucose, and supplied to the working electrode 23e. In the apparatus main body 3, a voltage is applied between the working electrode 23e and the counter electrode 23f via the terminal 35 (see FIG. 14), and the amount of movement of electrons with respect to the working electrode 23e is the current value as the terminal 35 (see FIG. 14). Measured by. Further, the apparatus main body 3 analyzes a specific component based on the measured current value, for example, calculates a glucose concentration.

  The puncture device 1 is configured so that blood is squeezed out from the fingertip 10 by the action portion 41 when the fingertip 10 is extracted from the accommodation space 40a of the squeezing tool 4. That is, it is possible to promote blood discharge by an extremely simple configuration in which the action portion 41 is provided without using a pump or cuff that has been conventionally used. As a result, the puncture device 1 can promote blood outflow without significantly increasing the manufacturing cost. In addition, the puncture apparatus 1 is advantageous in terms of running cost because it can promote blood discharge without using a drive source. Moreover, since the action part 41 acts on a fingertip when extracting the fingertip 10 from the accommodation space 40a of the liquid squeezing tool 4, the user is not forced to perform a troublesome work to promote blood outflow.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  The squeezing tool 4 ′ shown in FIG. 21 is obtained by fixing the action part 41 ′ inside the main body part 40 ′. However, the structure of the action part 41 ′ is different from the squeeze tool 4 described above. ing.

  As shown in FIGS. 21 and 22, the action portion 41 ′ has a first opening 41 a ′, a second opening 41 b ′, a receiving space 41 c ′, and a flange portion 41 d ′. It is formed in a shape. The action portion 41 ′ is formed as an elastic body by being formed of rubber or elastomer.

  The first opening 41a ′ is positioned on the side of the removal direction N ′ inside the main body 40 ′. The size of the first opening 41 a ′ is larger than the size of the fingertip 10. The second opening 41b ′ is positioned on the side in the insertion direction N ″ inside the main body 40 ′, and has a smaller diameter than the first opening 41a ′. The second opening 41b ′. Has a size smaller than the dimension of the fingertip 10 and is configured to have a larger diameter when inserted through the fingertip 10. The accommodation space 41c 'has first and second openings 41a'. 41b ', the flange portion 41d' defines the diameter of the first opening portion 41a 'and is used to fix the action portion 41' to the main body portion 40 '. Part.

  The squeezing tool 4 ′ is configured as an elastic body as a whole, and the first and second openings 41 a ′ and 41 b ′ have different diameters. In this case, in the squeezing tool 4 ', for example, the fingertip 10 is housed inside the main body 40' in a fashion that is inserted into the action part 41 '. The blood can be squeezed out of the fingertip 10 by removing the fingertip 10 from the main body 40 'after incising the fingertip 10. When the fingertip 10 is inserted into the action portion 41', the action portion Since the entire 41 'is configured as an elastic body, and the size of the second opening 41b' is smaller than the dimension of the fingertip 10, the diameter of the second opening 41b 'is increased. , Fingertip 1 A tightening force is applied in the vicinity of the second opening 41b 'at this point, thereby causing the fingertip 10 to become congested.On the other hand, when the fingertip 10 is removed from the action portion 41' while the fingertip 10 is incised. Since the tightening force is acting in the vicinity of the second opening 41b ′ in the fingertip 10, blood is squeezed out from the fingertip 10. In the action portion 41 ′, the fingertip 10 is moved by the second opening 41b ′. This makes it possible to squeeze blood more appropriately because it is congested.

  Of course, the timing of incising the fingertip 10 is not limited after the fingertip 10 is accommodated in the main body portion 40 ′ (the fingertip 1 is inserted into the action portion 41 ′), and the fingertip 10 is accommodated in the main body portion 40 ′ (the action portion 41). It may be before the fingertip 1 is inserted into '.

  The present invention is not limited to the first and second embodiments described above, and various modifications can be made. For example, the biosensor 23 may be provided in the squeezing tool 4, 4 ′.

It is sectional drawing which shows an example of the puncture apparatus which concerns on the 1st Embodiment of this invention. It is the perspective view which fractured | ruptured and showed the principal part of the puncture device shown in FIG. It is sectional drawing to which the principal part for demonstrating the puncture mechanism in the puncture apparatus shown in FIG. 1 was expanded. It is sectional drawing to which the principal part for demonstrating the squeezing tool in the puncture apparatus shown in FIG. 1 was expanded. FIG. 2 is an overall perspective view of a lancet used by being attached to the puncture device shown in FIG. 1. It is sectional drawing which follows the XI-XI line of FIG. It is sectional drawing which follows the XII-XII line | wire of FIG. It is sectional drawing which shows the state which removed the cap part in the lancet shown in FIGS. It is sectional drawing which follows the XI-XI line of FIG. It is the principal part perspective view which notched and showed a part for demonstrating the internal structure of a lancet. It is a top view of the lancet of the state shown in FIG. It is sectional drawing for demonstrating operation | movement of a lancet. It is sectional drawing for demonstrating operation | movement of a lancet. It is a whole perspective view of the biosensor integrated in the lancet. FIG. 15 is an exploded perspective view of the biosensor shown in FIG. 14. It is sectional drawing which follows the XVI-XVI line | wire of FIG. It is sectional drawing which follows the XVII-XVII line of FIG. It is principal part sectional drawing for demonstrating the usage method of the puncture apparatus shown in FIG. It is principal part sectional drawing for demonstrating operation | movement of a puncture mechanism. It is principal part sectional drawing for demonstrating the blood introduction process in a biosensor. It is sectional drawing which shows the liquid squeezing tool which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the action part in the liquid squeezing tool shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Puncturing device 10 Fingertip 4,4 '(Puncture device) squeezing tool 40 (Liquid squeezing device) main body (accommodating portion)
40a (squeezing tool) accommodation space 40c (squeezing tool) through-hole 41, 41 '(squeezing tool) working part 41a' (working part) first opening 41b '(working part) second Aperture

Claims (15)

A squeezing tool for squeezing body fluid from an incised fingertip,
An accommodating portion having an accommodating space for inserting a fingertip;
An action part for causing a force directed in the insertion direction to act on the fingertip when the fingertip protruding in the accommodation space and inserted into the accommodation part is removed;
A squeezing tool characterized by comprising:   The operation portion is configured to have a greater resistance to removal when the fingertip is removed from the housing portion than to an insertion resistance when the fingertip is inserted into the housing portion. The squeezing tool described.   The liquid squeezing tool according to claim 2, wherein the action portion is configured to be able to bend so that an insertion resistance is reduced when a fingertip is inserted into the housing portion.   The said action part is a squeeze tool of Claim 3 comprised as a leaf | plate spring.   The liquid storage device according to any one of claims 1 to 4, wherein the housing portion has a through hole corresponding to a liquid discharge site on a fingertip.   The liquid squeezing device according to any one of claims 1 to 5, wherein the liquid squeezing device is used by being attached to a puncture device for incising the skin by inserting a puncture element into the skin. A device body for piercing the skin with a puncture element and incising the skin;
A squeezing tool for squeezing body fluid from the fingertips;
A puncture device comprising:   The squeezing tool is oriented in the insertion direction with respect to the fingertip when removing the fingertip inserted into the main body portion and the accommodating portion having an accommodating space for inserting the fingertip and the accommodating space. The puncture device according to claim 7, further comprising an action portion for applying a force.   The action portion is configured to have a greater resistance to removal when the fingertip is removed from the accommodating portion than to an insertion resistance when the fingertip is inserted into the accommodating portion. The puncture device as described.   The puncture device according to claim 9, wherein the action unit is configured to be able to bend so that an insertion resistance is reduced when a fingertip is inserted into the housing unit.   The puncture apparatus according to claim 10, wherein the action portion is configured as a leaf spring.   The operation portion has a first opening located on the removal direction side and a second opening located on the insertion direction side and having a diameter smaller than that of the first opening. The puncture device as described.   The puncture apparatus according to claim 12, wherein the second opening is configured to have a larger diameter when a fingertip is inserted.   The puncture apparatus according to any one of claims 8 to 13, wherein the housing portion has a through hole corresponding to a liquid discharge site on a fingertip.   The puncture device according to any one of claims 7 to 14, wherein the squeezing tool is detachable from the device main body.

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