WO2014045347A1

WO2014045347A1 - Component-measuring device

Info

Publication number: WO2014045347A1
Application number: PCT/JP2012/073891
Authority: WO
Inventors: 池田朋弘
Original assignee: テルモ株式会社
Priority date: 2012-09-19
Filing date: 2012-09-19
Publication date: 2014-03-27

Abstract

The component-measuring device (10) measures a specified component of a body fluid collected in a measurement tip (200) and is provided with: a tip-mounting section (28) inserted to slide freely inside the opening of the tip end of a case (12) in a configuration that allows the measurement tip (200) to be mounted; an ejector (20) capable of changing position between a separating position in which the measurement tip (200) can be separated from the tip-mounting section (28) and a mounting position, which is closer to the base end of the case (12) than the separating position and in which the measurement tip (200) can be mounted on the tip-mounting section (28); and a switching mechanism (120) for switching the position of the ejector (20) between the separating position and the mounting position on the basis of the sliding motion of the tip-mounting section (28) toward the base end of the case (12).

Description

Component measuring device

The present invention relates to a component measuring apparatus for measuring a predetermined component of a body fluid collected on a measuring chip.

2. Description of the Related Art Conventionally, component measuring devices that detect biological components in body fluids such as blood and urine and measure the amount and properties of the components are widely used.

When measuring a blood glucose level using this type of component measuring apparatus, for example, a disposable measuring chip is mounted on the chip mounting portion constituting the component measuring apparatus, and blood is soaked into the test paper of the measuring chip. And the blood glucose level of the blood soaked in the test paper is measured.

Such a component measuring device is usually provided with an eject lever for detaching a used measuring tip (see, for example, JP-A-2011-64596). In this case, when the user or the like operates the eject lever, the ejector disposed in the tip mounting portion can be slid to the distal end side to push out the measuring tip from the tip mounting portion.

In the prior art as described above, when the user or the like carelessly operates the eject lever and the used measurement tip is pushed out (jumps out) from the tip mounting portion, it adheres to the measurement tip. There is a possibility that a third person touches the blood and is infected with AIDS or hepatitis.

In order to prevent such blood infection, the user or the like should operate the eject lever while holding the tip cover so that the tip is not popped out by covering the tip cover with the tip cover. Therefore, it is necessary to detach the used measuring tip from the tip mounting portion.

However, in this case, for example, since the ejector lever must be operated with the finger of the right hand while the component measuring device is gripped with the right hand and the tip cover is gripped with the left hand, the operation of removing the measuring tip becomes complicated. Sometimes. In particular, a user with a small hand may not be able to smoothly take out the measuring chip because the finger of the right hand holding the component measuring device may not reach the eject lever.

The present invention has been made in view of such problems, and an object of the present invention is to provide a component measuring apparatus capable of safely removing a measuring chip with a simple operation.

[1] A component measuring apparatus according to the present invention is a component measuring apparatus for measuring a predetermined component of a body fluid collected in a measuring chip, and the casing and the casing in a state where the measuring chip can be mounted. A tip mounting portion that is slidably inserted into the opening on the distal end side of the head, a detachment position at which the measuring chip can be detached from the tip mounting portion, and a base end side of the housing from the detachment position. An ejector that is displaceable to a mounting position at which the measurement chip can be mounted on the chip mounting part, and a slide operation of the chip mounting part toward the base end side of the housing, between the separation position and the mounting position. And a position switching means for switching the position of the ejector between them.

According to the component measuring apparatus according to the present invention, for example, by pressing the chip cover toward the base end side of the casing while the chip cover is put on the used measuring chip, the chip mounting portion is Since the position of the ejector can be switched from the mounting position to the detaching position by sliding to the base end side, the measuring chip can be detached from the chip mounting portion. Thereby, the measurement chip can be safely removed by a simple operation of pushing the chip cover toward the base end side of the housing. Therefore, even a user with a small hand or the like does not need to operate the eject lever as in the prior art, and thus the measuring tip can be smoothly removed from the tip mounting portion.

Further, for example, by attaching an unused measuring chip to the chip mounting part, the chip mounting part is slid to the base end side of the housing to switch the position of the ejector from the detached position to the mounting position. Therefore, the measurement chip can be securely mounted on the chip mounting portion.

[2] In the above-described component measuring apparatus, the position switching unit includes a biasing unit that biases the ejector toward the distal end side of the casing, a displacement that is displaceable along an axial direction of the casing, An ejector support that is disposed within the housing and is supported in a rotatable manner along the axis, and that locks the ejector support so that the position of the ejector is maintained at the mounting position. The locking means, the locking position where the ejector support portion is locked by the locking means in conjunction with the sliding movement of the chip mounting portion toward the base end side of the casing, and the locking by the locking means And a cam mechanism that is displaced to a release position where the stop state is released.

According to such a configuration, when the tip mounting portion is slid to the base end side of the housing with the ejector positioned at the mounting position, the ejector support portion is locked by the locking means by the cam mechanism. Therefore, the ejector urged toward the front end side of the casing by the urging means can be positioned at the disengagement position.

On the other hand, if the tip mounting portion is slid toward the base end side of the housing while the ejector is in the disengagement position, the ejector support portion is displaced from the release position to the locking position by the cam mechanism. Even if the biasing means is biased toward the front end side of the housing, the position of the ejector can be maintained at the mounting position.

[3] In the above-described component measuring apparatus, the ejector support portion is formed in an annular shape, and a plurality of the locking means are provided on the outer peripheral surface of the ejector support portion at intervals in the circumferential direction. A claw and a stopper portion provided in the same number as the locking claw along the circumferential direction of the ejector support portion in a state in which the claw can be brought into contact with the locking claw may be included.

According to such a configuration, a plurality of locking claws are provided on the outer peripheral surface of the ejector support portion, and the same number of stopper portions as the locking claws are provided in the housing. By making it contact, an ejector support part can be stopped suitably. Further, by rotating the ejector support portion, each locking portion can be positioned between the adjacent stopper portions, and the locking state of the ejector support portion can be easily released. That is, by simply rotating the ejector support portion, the ejector support portion can be positioned at the locking position and the release position, so that the configuration of the component measuring apparatus can be simplified.

[4] In the above-described component measuring apparatus, the cam mechanism includes a plurality of first cam protrusions arranged in an annular shape protruding from the ejector support portion toward the front end side of the housing, and the tip mounting portion. A plurality of second cam protrusions that protrude from the base toward the base end side of the housing and are arranged in an annular shape, and the first cam protrusions and the second cam protrusions protrude from the second cam protrusions. An inclined surface that is inclined so that the width dimension along the circumferential direction becomes narrower in the direction may be formed.

According to such a configuration, the tip mounting portion is moved in a state where the inclined surface of each first cam projection protruding from the ejector support portion and the inclined surface of each second cam projection protruding from the tip mounting portion are in contact with each other. By sliding to the base end side of the housing, the ejector support portion can be rotated in the circumferential direction.

[5] In the above component measurement apparatus, the locking means includes a rotation blocking unit that blocks rotation of the ejector support unit in a state where the ejector is positioned at the mounting position or the detaching position. In a state where the rotation of the ejector support portion is blocked by the rotation blocking portion, the top portion of each first cam projection and the valley portion formed between the adjacent second cam projections are not in contact with each other. The inclined surface of each first cam protrusion and the inclined surface of each second cam protrusion may be in contact with each other.

According to such a configuration, the rotation of the ejector support portion is blocked by the rotation blocking portion while the ejector is located at the mounting position or the disengagement position, and the inclined surface of each first cam projection and each second cam Since the inclined surface of the protrusion is in contact, when the ejector is positioned at the mounting position or the detaching position, the tip mounting portion may be biased to the tip side of the housing by the biasing means. it can. As a result, it is preferable to prevent the chip mounting portion from rattling against the housing in a state where the chip mounting portion is not pushed to the base end side of the housing (for example, a state where a predetermined component of body fluid is measured). Can do. At this time, since the top portion of each first cam projection and the valley portion formed between the adjacent second cam projections are not in contact with each other, when the chip mounting portion slides to the base end side of the housing, The ejector support portion can be reliably rotated.

It is the perspective view which showed the state which mounted | wore the measuring chip | tip with the component measuring device which concerns on one Embodiment of this invention. FIG. 2 is a partially omitted sectional view taken along line II-II in FIG. 1. FIG. 3 is a partially omitted exploded perspective view of the member shown in FIG. 2. FIG. 4 is a cross-sectional perspective view taken along line IV-IV in FIG. 2. It is the cross-sectional perspective view which showed the state which has pushed the chip | tip mounting part to the base end side of the housing | casing in the state which covered the chip | tip cover to the used measurement chip | tip. It is the cross-sectional perspective view which showed the state which the ejector support part is rotating in response to the sliding operation | movement to the base end side of the said housing | casing of the said chip | tip mounting part. It is a section explanatory view for explaining the state where a locking claw was located between adjacent stopper parts. It is the cross-sectional perspective view which showed the state which the chip | tip for a measurement has removed | separated from the chip | tip mounting part.

Hereinafter, preferred embodiments of the component measuring apparatus according to the present invention will be exemplified and described with reference to the accompanying drawings.

The component measuring apparatus 10 according to the present embodiment is a blood glucose meter that can be mounted with a measuring chip 200 at its tip and measures and displays the glucose concentration (blood glucose level) in the blood collected on the measuring chip 200. It is configured. First, the measurement chip 200 will be described.

The measuring chip 200 is a so-called disposable product and is packaged in an individual package. As shown in FIGS. 2 and 3, the measuring chip 200 includes a chip body 202 integrally formed of resin or the like, and a test paper 204 provided on the chip body 202.

The chip body 202 includes a plurality of (four in this embodiment) mounting claws 206 formed on the base end side, a disk-shaped base portion 208 provided on the distal end side of the mounting claws 206, and a base portion 208. And a suction projection 210 protruding from the approximate center toward the tip side.

The plurality of mounting claws 206 are arranged at equal intervals in the circumferential direction on the outer peripheral portion of the base portion 208. The chip body 202 is formed with a small-diameter blood introduction path 212 that opens to the proximal end surface of the base portion 208 and the distal end surface of the suction protrusion 210.

The test paper 204 is made of, for example, polyethersulfone and is fixed to the base end surface of the base portion 208. Examples of the reagent impregnated in the test paper 204 include color formers such as glucose oxidase (GOD), peroxidase (POD), 4-aminoantipyrine, and N-ethyl N- (2-hydroxy-3-sulfopropyl). It is done.

Next, the component measuring apparatus 10 according to the present embodiment will be described. In the following description, with respect to the component measuring apparatus 10 and its components, the side on which the measurement chip 200 is attached is referred to as “front end side”, and the opposite side is referred to as “base end side”.

As shown in FIGS. 1 to 4, the component measuring apparatus 10 according to the present embodiment includes an elongated cylindrical casing 12, a cap 14 that closes an opening on the proximal end side of the casing 12, A plurality (four in this embodiment) of spring members (biasing means, elastic members) 16 disposed in the housing 12, a spring support ring 18 for supporting each spring member 16, and each spring member 16, an ejector 20 that is urged toward the front end side, an annular ejector support portion 22 that supports the ejector 20, and a stopper member 24 that is provided on the housing 12 and stops the ejector support portion 22 at a predetermined position. The chip mounting unit 28 to which the measuring chip 200 is mounted and the photometric unit 30 provided on the chip mounting unit 28 are provided.

As can be understood from FIGS. 1 and 2, the housing 12 is made of, for example, a resin having a size that can be easily gripped by human hands, and is formed from a rectangular tubular body 32 and a front end of the body 32. And a tip wall portion 34 projecting inward.

The body portion 32 is provided with a power button 36 located on the base end side thereof, and a liquid crystal display 38 located on the distal end side of the power button 36 and extending along the longitudinal direction of the body portion 32. In the present embodiment, when the user or the like presses the power button 36, the power of the component measuring apparatus 10 is turned on, and the liquid crystal display 38 is lit. On the liquid crystal display 38, the blood sugar level measured by the component measuring apparatus 10 can be displayed.

A plurality of (for example, four) spring support walls 40 projecting toward the inside of the trunk portion 32 are formed at the front end side of the trunk portion 32 (see FIG. 2). The tip wall portion 34 is formed in a square ring shape, and the chip mounting portion 28 is inserted into the inner hole (tip opening portion of the housing 12).

As each spring member 16, for example, a compression coil spring is used. Each spring member 16 is interposed between each spring support wall 40 and the spring support ring 18. The spring support ring 18 is disposed in the casing 12 so as to be slidable along the longitudinal direction of the casing 12 while being in contact with the base end surface of the ejector support portion 22. The spring support ring 18 may be provided in the housing 12 so as not to rotate around the axis of the housing 12.

In this case, the rotation of the spring support ring 18 with the rotation of the ejector support portion 22 can be suitably suppressed. Thereby, it can prevent that the spring support ring 18 rotates and an extra stress acts on each spring member 16. FIG.

The ejector 20 has a separation position (a position shown in FIG. 8) where the measurement chip 200 can be detached from the chip mounting portion 28 and a proximal end side of the housing 12 from the separation position, and the measurement chip 200 is inserted into the chip mounting portion. It is provided so as to be displaceable to a mounting position (position shown in FIG. 2) that can be mounted on 28, and is integrally formed with resin or the like.

The ejector 20 includes a ring portion 42, an annular convex portion 44 projecting radially outward from the outer peripheral surface of the ring portion 42, and a pair of extending portions provided on the inner peripheral surface of the ring portion 42 and extending toward the distal end side. It has the existing part 46 and the extrusion part 48 provided in the front-end | tip of each extended part 46. As shown in FIG.

The extruding part 48 has a shape like a cylindrical body cut out along its axial direction. The distal end surface of the extruding portion 48 faces the proximal end surface of the mounting claw 206 of the measuring chip 200 mounted on the chip mounting portion 28.

The ejector support portion 22 includes a flange portion 52 that protrudes radially outward from the base end thereof, and a plurality (ten in this embodiment) of locking claws 54 provided on the outer peripheral surface of the ejector support portion 22. A plurality (20 in this embodiment) of first cam projections 56 projecting from the tip of the ejector support 22 toward the tip are integrally provided.

An annular groove 58 is formed on the inner peripheral surface of the proximal end side of the ejector support portion 22. And the ring part 42 is inserted in the base end side of the ejector support part 22 in the state which the annular convex part 44 fitted to the annular groove 58. FIG.

That is, the ejector support portion 22 and the ejector 20 are displaced together along the axial direction of the housing 12. Further, the ejector support portion 22 can rotate around the axis of the housing 12 with respect to the ejector 20.

The flange portion 52 is slidably disposed on the inner surface of the body portion 32 of the housing 12. That is, the ejector support portion 22 is disposed in the housing 12 in a state that it can be displaced along the axial direction of the housing 12 and can be rotated around the axis of the housing 12.

The plurality of locking claws 54 are arranged at equal intervals along the circumferential direction of the ejector support portion 22. Each locking claw 54 extends from the proximal end side of the ejector support portion 22 to the distal end of the first cam projection 56, and the width dimension of the proximal end side (dimension along the circumferential direction of the ejector support portion 22). Is substantially half the width of the base end of the first cam projection 56. An inclined surface 60 that is inclined so as to become narrower toward the tip is formed at the tip of each locking claw 54 (see FIG. 3).

The plurality of first cam protrusions 56 are continuously arranged in an annular shape along the circumferential direction of the ejector support portion 22. Each first cam projection 56 is formed in a triangular shape when viewed from the radial direction of the ejector support portion 22.

That is, a pair of left and right first inclined

surfaces

62L and 62R are formed on each first cam projection 56 so as to gradually become narrower toward the tip side (projection direction). In the present embodiment, the first inclined surface 62L of each first cam protrusion 56 and the inclined surface 60 of each locking claw 54 are connected to form one inclined surface.

As shown in FIG. 4, the stopper member 24 is provided integrally with the distal end wall portion 34 of the housing 12, and a plurality of (this embodiment) for preventing (limiting) the rotation of the ejector support portion 22. 20) and a plurality of (the same number as the above-described

locking claws

54, 10 in the present embodiment) for locking the locking claws 54 so that the ejector 20 is maintained at the mounting position. And a stopper 66.

The plurality of rotation preventing portions 64 extend radially in a state where they are arranged at equal angular intervals along the axis of the housing 12. Each rotation prevention portion 64 is formed with a guide surface 68 that is inclined so as to become narrower toward the base end side of the housing 12. An inclined surface 60 of the locking claw 54 is slidable on each guide surface 68.

The plurality of stopper portions 66 are arranged at intervals between the adjacent rotation prevention portions 64. The height dimension of each stopper part 66 (the dimension along the axial direction of the housing 12) is smaller than the height dimension of each rotation prevention part 64.

The chip mounting portion 28 includes a disc portion 72 provided with a plurality of second cam projections 70 (the same number as the first cam projections 56 described above, 20 in this embodiment), and projects from the disc portion 72 toward the distal end side. The bottomed rectangular tube-shaped base portion 76 and a cylindrical portion 78 formed on the distal end side of the base portion 76 and to which the measuring chip 200 is attached.

The plurality of second cam protrusions 70 are continuously arranged in an annular shape in the circumferential direction in a state of protruding from the disc portion 72 toward the base end side. Each second cam projection 70 is configured in the same manner as the first cam projection 56 described above, and is formed in a triangular shape when viewed from the radial direction of the disc portion 72. That is, a pair of left and right second inclined

surfaces

74L and 74R are formed on each second cam projection 70 so as to gradually become narrower toward the base end side (projection direction). The outer diameter of the disc part 72 is formed to be approximately the same as the outer diameter of the ejector support part 22 (see FIG. 2).

The base 76 is slidably inserted into the front end opening of the housing 12. On the inner surface of the cylindrical portion 78, an annular locking portion 80 is formed to which the plurality of mounting claws 206 of the measuring chip 200 are locked.

As can be understood from FIGS. 2 and 3, the photometry unit 30 includes a photometry control board 84 electrically connected to a main control board (not shown) via a flexible board 82, and a photometry control board 84. And a cylindrical light guide portion 88 protruding from the substrate placement portion 86 toward the front end side.

The photometry control board 84 is formed with a plurality (two in this embodiment) of insertion holes 92 through which screw members 90 for fixing the photometry control board 84 to the board placement portion 86 are inserted. Further, the photometric control board 84 has a first light emitting element 94 for irradiating the test paper 204 with light having the first wavelength, and light having a second wavelength different from the first wavelength is applied to the test paper 204. A second light emitting element 96 for irradiation and a light receiving element 98 for detecting (receiving) reflected light guided from the test paper 204 are mounted.

In the present embodiment, a light emitting diode (LED) is used as the first light emitting element 94 and the second light emitting element 96, and a photodiode (PD) is used as the light receiving element 98. Further, a through hole 100 is formed between the first light emitting element 94 and the second light emitting element 96 and the light receiving element 98 in the photometric control board 84.

The substrate placement portion 86 and the light guide portion 88 are integrally formed of resin or the like. A plurality of (two in the present embodiment) insertion holes 104 through which the screw members 102 for fixing the photometric unit 30 to the chip mounting unit 28 are inserted are formed in the substrate placement unit 86.

The light guide 88 is formed with a partition 110 that extends along the axial direction and partitions the light guide 88 into an irradiation light path 106 and a reflection light path 108. The base end portion of the partition wall 110 is located in the through hole 100 of the photometric control board 84. Thereby, it is possible to suitably prevent the light receiving element 98 from directly receiving the light emitted from the first light emitting element 94 or the second light emitting element 96.

The lens 112 is inserted and held in the front end side opening of the light guide 88. The lens 112 includes an irradiation lens 114 that condenses the light guided from the irradiation optical path 106 onto the test paper 204, and a light guide lens 116 that condenses the reflected light guided from the test paper 204 onto the light receiving element 98. Yes. An O-ring 118 is interposed between the lens 112 and the light guide unit 88.

The component measuring apparatus 10 according to the present embodiment is basically configured as described above. Next, an operation of removing the used measuring chip 200 from the component measuring apparatus 10 will be described.

In the present embodiment, the ejector 20 is located at the mounting position in a state where the measurement chip 200 is mounted on the component measuring device 10 (a state in which the blood glucose level measurement is completed by the component measuring device 10).

That is, as shown in FIG. 5, the first inclined surfaces 62 </ b> R of the first cam protrusions 56 and the second inclined surfaces of the second cam protrusions 70 in a state where the locking claws 54 are in contact with the stopper portions 66. 74R is in contact.

At this time, the locking claw 54 comes into contact with the rotation preventing portion 64 so that the rotation of the ejector support portion 22 around the axis of the housing 12 is prevented, and the first cam protrusion 56 adjacent to the top portion of the first cam projection 56 is adjacent. The valley formed between the two cam projections 70 is not in contact with the two cam projections 70. In other words, the first inclined surfaces 62L and the second inclined surfaces 74L are separated from each other.

Then, the user or the like puts the chip cover 250 on the used measurement chip 200. By covering the measurement chip 200 with the chip cover 250 in this way, it is possible to prevent a user or the like from directly touching the blood adhering to the measurement chip 200. At this time, the base end surface of the chip cover 250 comes into contact with the front end surface of the base portion 76 of the chip mounting portion 28.

Next, the user or the like presses the chip cover 250 toward the base end side with respect to the casing 12 or presses the casing 12 toward the tip end side with respect to the chip cover 250. Then, the tip mounting portion 28 pushed by the tip cover 250 slides to the proximal end side with respect to the housing 12 while compressing each spring member 16.

When the tip mounting portion 28 slides to the base end side, the ejector support portions 22 pushed by the second cam protrusions 70 are displaced to the base end side together with the ejectors 20, and the locking claws 54 are separated from the rotation preventing portion 64. (The locking claw 54 is located on the proximal end side with respect to the rotation preventing portion 64).

Then, the first cam projections 56 slide on the second inclined surface 74R so that the tops of the first cam projections 56 and the valleys formed between the adjacent second cam projections 70 are close to each other, thereby ejecting the ejector. The support portion 22 rotates clockwise with respect to the ejector 20 and the housing 12 when viewed from the proximal end side of the component measuring apparatus 10.

Thereby, the inclined surface 60 of each latching claw 54 is the rotation blocking portion in a state where the first inclined surface 62R and the second inclined surface 74R are in contact with each other and the first inclined surface 62L and the second inclined surface 74L are in contact with each other. 64 guide surfaces 68 (see FIG. 6).

Subsequently, when the user or the like loosens the force pushing the chip cover 250, the ejector support portion 22 and the ejector 20 are displaced toward the distal end side by the biasing force of the plurality of spring members 16. Then, the inclined surfaces 60 of the respective locking claws 54 come into contact with the guide surfaces 68 of the rotation preventing portions 64 so that the first cam protrusions 56 and the second cam protrusions 70 are separated from each other.

Then, when the inclined surface 60 slides on the guide surface 68, the ejector support 22 rotates clockwise with respect to the housing 12 and the ejector 20 as viewed from the proximal end side, and each first cam projection 56 is The first inclined surface 62R and the second inclined surface 74R come into contact with each other over the second cam protrusions 70.

Next, the inclined surface 60 is separated from the guide surface 68, and each locking claw 54 is located at a location where the stopper portion 66 is not provided in the space between the adjacent rotation preventing portions 64 (see FIG. 7). . Further, the ejector support portion 22 and the ejector 20 are further displaced toward the distal end side by the urging force of the plurality of spring members 16, and the ejector 20 is located at a disengagement position where the measurement chip 200 can be disengaged (see FIG. 8).

That is, since the mounting claw 206 of the measuring chip 200 is pushed to the tip side by the pushing portion 48 of the ejector 20, the mounting claw 206 is detached from the annular locking portion 80. As a result, the measuring chip 200 is removed from the chip mounting portion 28.

At this time, the top of each first cam projection 56 and the valley between adjacent second cam projections 70 are not in contact with each other. That is, a gap is formed between the first inclined surface 62L of each first cam protrusion 56 and the second inclined surface 74L of each second cam protrusion 70.

As a result, when the new measurement chip 200 is mounted on the chip mounting portion 28 in the next blood glucose level measurement, the ejector support portion 22 is rotated so that the locking claws 54 come into contact with the stopper portions 66. Thus, since the ejector 20 can be positioned at the mounting position, the measuring chip 200 can be securely mounted on the chip mounting portion 28.

The component measuring apparatus 10 according to the present embodiment has a switching mechanism (position switching) that switches the position of the ejector 20 between the disengagement position and the mounting position based on the sliding operation of the chip mounting unit 28 toward the base end side of the housing 12. Means) 120.

The switching mechanism 120 is capable of being displaced along the axial direction of the housing 12 and rotating around the axis of the housing 12, and a plurality of spring members 16 that urge the ejector 20 toward the distal end side of the housing 12. In this state, the ejector support 22 is disposed in the housing 12 and supports the ejector 20, and a locking mechanism (locking) that locks the ejector support 22 so that the position of the ejector 20 is maintained at the mounting position. Means) 122 and the locking position at which the ejector support 22 is locked by the locking mechanism 122 in conjunction with the sliding movement of the chip mounting portion 28 toward the proximal end of the housing 12 and the locking mechanism 122 And a cam mechanism 124 that is displaced to a release position where the stop state is released.

The locking mechanism 122 includes a plurality of locking claws 54 and a stopper member 24, and the cam mechanism 124 includes a plurality of first cam protrusions 56 and a plurality of second cam protrusions 70.

According to the present embodiment, for example, by pressing the chip cover 250 toward the base end side of the housing 12 in a state where the chip cover 250 is put on the used measuring chip 200, the chip mounting portion 28 is moved to the housing 12. Since the position of the ejector 20 can be switched from the attachment position to the separation position by sliding to the base end side, the measurement chip 200 can be detached from the chip attachment portion 28.

Thereby, the measuring chip 200 can be safely removed by a simple operation of pushing the chip cover 250 toward the base end side of the housing 12. Therefore, even if the user has a small hand, the measuring chip 200 can be smoothly removed from the chip mounting portion 28.

Further, for example, by mounting an unused measurement chip 200 on the chip mounting portion 28, the chip mounting portion 28 is slid toward the base end side of the housing 12, and the position of the ejector 20 is moved from the detached position to the mounting position. Therefore, the measurement chip 200 can be reliably mounted on the chip mounting portion 28.

According to the present embodiment, when the chip mounting portion 28 is slid to the proximal end side of the housing 12 with the ejector 20 positioned at the mounting position, the first cam protrusion 56 and the second cam protrusion 70 (cam mechanism) 124), the ejector support portion 22 is displaced from the locking position locked by the locking claw 54 and the stopper member 24 (locking mechanism 122) to the release position where the locking state by the locking mechanism 122 is released. The ejector 20 urged toward the front end side of the housing 12 by the plurality of spring members 16 can be positioned at the disengagement position.

On the other hand, when the tip mounting portion 28 is slid to the proximal end side of the housing 12 with the ejector 20 positioned at the disengagement position, the ejector support portion 22 is displaced from the release position to the locking position by the cam mechanism 124. Therefore, even if the ejector 20 is urged toward the distal end side of the housing 12 by the plurality of spring members 16, the position of the ejector 20 can be stopped (maintained) at the mounting position.

In the present embodiment, since a plurality of locking claws 54 are provided on the outer peripheral surface of the ejector support portion 22 and the same number of stopper portions 66 as the locking claws 54 are provided on the housing 12, each locking claw 54 is connected to each stopper. By abutting against the portion 66, the ejector support portion 22 can be locked at the locking position. Further, by rotating the ejector support portion 22, each locking claw 54 can be positioned between the adjacent stopper portions 66 and the locked state of the ejector support portion 22 can be easily released. That is, by simply rotating the ejector support portion 22, the ejector support portion 22 can be positioned at the locking position and the release position, so that the configuration of the component measuring apparatus 10 can be simplified.

According to the present embodiment, the first inclined surface 62R of each first cam protrusion 56 protruding from the ejector support portion 22 and the second inclined surface 74R of each second cam protrusion 70 protruding from the tip mounting portion 28 come into contact with each other. Therefore, the ejector support portion 22 can be rotated in the circumferential direction in conjunction with the sliding operation of the chip mounting portion 28 toward the proximal end side of the housing 12.

In a state where the ejector 20 is located at the mounting position or the disengagement position, the rotation preventing portion 64 prevents rotation of the ejector support portion 22, and the first inclined surface 62R of each first cam projection 56 and each second cam projection. 70 is in contact with the second inclined surface 74R, so that when the ejector 20 is positioned at the mounting position or the detaching position, the tip mounting portion 28 of the casing 12 is moved by the plurality of spring members 16. It can be biased to the tip side.

Accordingly, it is preferable that the chip mounting portion 28 rattles against the housing 12 in a state where the chip mounting portion 28 is not pushed to the proximal end side of the housing 12 (for example, a state where a blood glucose level is measured). Can be suppressed.

At this time, since the top of each first cam projection 56 and the valley formed between the adjacent second cam projections 70 are not in contact with each other, the chip mounting portion 28 slides toward the base end side of the housing 12. When it does, the ejector support part 22 can be rotated reliably.

In the above description, the present invention has been described with reference to preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Yes.

For example, the component measuring apparatus according to the present invention may be any device that measures a predetermined component of a body fluid, and is not limited to a blood glucose meter that measures a blood glucose level.

Claims

A component measuring device (10) for measuring a predetermined component of a body fluid collected in a measuring chip (200),
A housing (12);
A chip mounting portion (28) slidably inserted into the opening on the distal end side of the housing (12) in a state where the measurement chip (200) can be mounted;
A separation position where the measurement chip (200) can be detached from the chip mounting portion (28) and a base end side of the housing (12) with respect to the separation position, and the measurement chip (200) is disposed on the chip. An ejector (20) displaceable to a mounting position at which the mounting portion (28) can be mounted;
Position switching means (120) for switching the position of the ejector (20) between the disengagement position and the mounting position based on the sliding operation of the chip mounting portion (28) toward the base end side of the housing (12). )When,
A component measuring apparatus (10) comprising:
In the component measuring device (10) according to claim 1,
The position switching means (120) includes an urging means (16) for urging the ejector (20) toward the distal end side of the housing (12),
The ejector (20) is disposed in the housing (12) so as to be displaceable along the axial direction of the housing (12) and rotatable around the axis of the housing (12). An ejector support (22) for supporting;
Locking means (122) for locking the ejector support (22) so that the position of the ejector (20) is maintained at the mounting position;
A locking position where the ejector support portion (22) is locked by the locking means (122) in conjunction with the sliding movement of the tip mounting portion (28) toward the base end side of the housing (12). And a cam mechanism (124) for displacing to a release position where the locked state by the locking means (122) is released.
In the component measuring device (10) according to claim 2,
The ejector support portion (22) is formed in an annular shape,
The locking means (122) includes a plurality of locking claws (54) provided on the outer peripheral surface of the ejector support portion (22) at intervals in the circumferential direction;
A stopper portion (66) provided in the same number as the locking claw (54) along the circumferential direction of the ejector support portion (22) in a state in which the locking claw (54) can be contacted. A component measuring apparatus (10) characterized by the above.
In the component measuring device (10) according to claim 3,
The cam mechanism (124) includes a plurality of first cam protrusions (56) arranged in an annular shape so as to protrude from the ejector support portion (22) toward the distal end side of the housing (12).
A plurality of second cam protrusions (70) that protrude from the tip mounting portion (28) toward the base end side of the housing (12) and are arranged in an annular shape;
The first cam protrusions (56) and the second cam protrusions (70) have inclined surfaces (62L, 62R, 74L) inclined so that the width dimension along the circumferential direction becomes narrower toward the protruding direction. , 74R) are formed. Component measuring apparatus (10) characterized by the above-mentioned.
In the component measuring device (10) according to claim 4,
The locking means (122) includes a rotation blocking portion (64) for blocking rotation of the ejector support portion (22) in a state where the ejector (20) is positioned at the mounting position or the detaching position. ,
Between the second cam protrusions (70) adjacent to the tops of the first cam protrusions (56) in a state where the rotation of the ejector support parts (22) is blocked by the rotation prevention part (64). The inclined surface (62R) of each of the first cam protrusions (56) and the inclined surface (74R) of each of the second cam protrusions (70) are in contact with each other at a position where they are not in contact with each other. The component measuring apparatus (10) characterized by the above-mentioned.