JP7298244B2 - Sensor clip and liquid component measuring device - Google Patents

Description

The present invention relates to a sensor clip and a liquid component measuring device.

2. Description of the Related Art Conventionally, a liquid component measuring device including a sensor clip and a liquid containing cell (liquid containing portion) detachably attached to the sensor clip is known (see, for example, Patent Document 1). In the liquid component measuring device described in Patent Document 1, when the liquid containing cell is attached to or detached from the sensor clip, the sensor clip is provided on one side in the width direction by gripping the pair of gripping portions close to each other. The other side is opened by rotating around the support shaft. The liquid containing cell is configured to be inserted into and removed from the opened portion of the sensor clip.

Japanese Patent Publication No. 2018-531366

In such a sensor clip, when the liquid storage cell is attached to or detached from the sensor clip, the action of opening the sensor clip is repeatedly performed, so that the sensor clip is repeatedly rotated around the support shaft. As a result, there is a problem that the sensor clip deteriorates.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sensor clip and a liquid component measuring device capable of suppressing deterioration.

The present invention comprises a sensor section having a light emitting section and a light receiving section arranged opposite to the light emitting section, and the liquid containing section in a state where the liquid containing section is arranged between the light emitting section and the light receiving section. and a distance adjusting mechanism capable of adjusting a distance between the light emitting portion and the light receiving portion, wherein the distance adjusting mechanism comprises the light emitting portion and the light receiving portion It relates to a sensor clip that can change the distance while maintaining a parallel state with.

Further, the distance adjusting mechanism may include a biasing member that biases the light emitting section and the light receiving section to a side where the distance between the light emitting section and the light receiving section is reduced while the light emitting section and the light receiving section are maintained parallel to each other. preferable.

The sensor clip has a first clip-side fitting portion in which the light-emitting portion is arranged, and a first clip-side fitting portion formed opposite to the first fitting portion in the clip side, and the light-receiving portion is arranged inside the sensor clip. and a clip-side second fitting portion, wherein the liquid containing portion faces the clip-side first fitting portion when the liquid containing portion is attached to the sensor clip. An accommodating portion-side first fitting portion that fits into the first fitting portion, and an accommodating portion-side second fitting portion that fits into the clip-side second fitting portion while facing the clip-side second fitting portion. It is preferable to have a junction and a.

The clip-side first fitting portion and/or the clip-side second fitting portion protrude toward the front end side and/or the rear end side in the insertion direction when the liquid storage portion is attached to the sensor clip. It has a curved clip-side curved surface portion, and the accommodating portion-side first fitting portion and/or the accommodating portion-side second fitting portion are arranged behind the insertion direction when the liquid accommodating portion is attached to the sensor clip. It is preferable to have an accommodating portion side curved surface portion formed in a curved surface shape recessed toward the end side and/or the tip side and corresponding to the clip side curved surface portion.

The clip-side first fitting portion and/or the clip-side second fitting portion are formed in a convex shape or a concave shape, and the accommodating portion-side first fitting portion and/or the accommodating portion-side second fitting portion are formed in a convex shape or a concave shape. The part is preferably formed concavely or convexly.

Further, the sensor clip has an insertion open portion that is formed so as to be open on one side in the width direction and into which the liquid containing portion can be inserted, and a closing portion that closes the insertion opening portion at the end on the other side in the width direction. and, the liquid containing portion has an extending portion extending toward the distal end side in the insertion direction when the liquid containing portion is inserted into the insertion opening portion, and the closing portion is a portion of the liquid containing portion. It is preferable to have a regulating portion that regulates the position of the end portion of the extending portion on the distal end side in the insertion direction.

Further, a sensor clip having a light-emitting portion, a sensor portion having a light-receiving portion arranged to face the light-emitting portion, and a distance adjustment mechanism capable of adjusting a distance between the light-emitting portion and the light-receiving portion; and a liquid containing portion detachably attached to a sensor clip, wherein the distance adjustment mechanism changes the distance while maintaining the parallel state between the light emitting portion and the light receiving portion. It is preferable that the liquid containing portion has a channel through which liquid flows and is detachably attached between the light emitting portion and the light receiving portion of the sensor clip.

Further, the distance adjusting mechanism may include a biasing member that biases the light emitting section and the light receiving section to a side where the distance between the light emitting section and the light receiving section is reduced while the light emitting section and the light receiving section are maintained parallel to each other. preferable.

The sensor clip has a first clip-side fitting portion in which the light-emitting portion is arranged, and a first clip-side fitting portion formed opposite to the first fitting portion in the clip side, and the light-receiving portion is arranged inside the sensor clip. and a clip-side second fitting portion, wherein the liquid containing portion faces the clip-side first fitting portion when the liquid containing portion is attached to the sensor clip. An accommodating portion-side first fitting portion that fits into the first fitting portion, and an accommodating portion-side second fitting portion that fits into the clip-side second fitting portion while facing the clip-side second fitting portion. It is preferable to have a junction and a.

The clip-side first fitting portion and/or the clip-side second fitting portion protrude toward the front end side and/or the rear end side in the insertion direction when the liquid storage portion is attached to the sensor clip. It has a curved clip-side curved surface portion, and the accommodating portion-side first fitting portion and/or the accommodating portion-side second fitting portion are arranged behind the insertion direction when the liquid accommodating portion is attached to the sensor clip. It is preferable to have an accommodating portion side curved surface portion formed in a curved surface shape recessed toward the end side and/or the tip side and corresponding to the clip side curved surface portion.

The clip-side first fitting portion and/or the clip-side second fitting portion are formed in a convex shape or a concave shape, and the accommodating portion-side first fitting portion and/or the accommodating portion-side second fitting portion are formed in a convex shape or a concave shape. The part is preferably formed concavely or convexly.

Further, the sensor clip has an insertion open portion that is formed so as to be open on one side in the width direction and into which the liquid containing portion can be inserted, and a closing portion that closes the insertion opening portion at the end on the other side in the width direction. and, the liquid containing portion has an extending portion extending toward the distal end side in the insertion direction when the liquid containing portion is inserted into the insertion opening portion, and the closing portion is a portion of the liquid containing portion. It is preferable to have a regulating portion that regulates the position of the end portion of the extending portion on the distal end side in the insertion direction.

ADVANTAGE OF THE INVENTION According to this invention, the sensor clip and liquid component measuring device which can suppress deterioration can be provided.

1 is a diagram showing the overall configuration of a hemodialysis apparatus according to one embodiment of the present invention; FIG. FIG. 4 is a side view showing the liquid component measuring device with the blood chamber attached to the sensor clip. FIG. 10 shows the liquid component measuring device with the blood chamber removed from the sensor clip. FIG. 3 is a longitudinal sectional view of the liquid component measuring device shown in FIG. 2; FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; It is the perspective view which looked the sensor clip from the diagonally downward side. FIG. 6B is a view of the sensor clip shown in FIG. 6A viewed in the B direction; It is the perspective view which looked the sensor clip from the diagonal upper side. It is the figure which looked the sensor clip shown to FIG. 6B to the C direction. 4 is a view of the blood chamber shown in FIG. 3 as viewed in direction D; FIG. 4 is a view of the blood chamber shown in FIG. 3 as viewed in direction E; FIG.

An embodiment of a hemodialysis apparatus including the liquid component measuring device of the present invention will be described below with reference to the drawings. The hemodialysis apparatus of the present invention purifies the blood of patients with renal failure or drug addiction, removes excess water from the blood, and replenishes the blood with water (fluid replacement) as needed.
First, the overall configuration of the hemodialysis apparatus 1 of this embodiment will be described with reference to FIG. The hemodialysis apparatus 1 includes a dialyzer 10 as a hemodialyzer, a blood circuit 20, a dialysate circuit 30, and a controller 50.

The dialyzer 10 includes a cylindrical container body 11 and a dialysis membrane (not shown) housed inside the container body 11. The inside of the container body 11 is separated from the blood by the dialysis membrane. It is partitioned into a channel and a dialysate side channel (both not shown). The container body 11 is formed with a blood inlet 111 and a blood outlet 112 communicating with the blood-side channel, and a dialysate inlet 113 and a dialysate outlet 114 communicating with the dialysate-side channel.

The blood circuit 20 includes an arterial line 21 , a venous line 22 , a drug line 23 and an overflow line 24 . The arterial line 21, the venous line 22, the drug line 23, and the overflow line 24 are all mainly composed of flexible tubes through which liquids can flow.

One end of the arterial line 21 is connected to the artery of the subject (dialysis patient), and the other end is connected to the blood inlet 111 of the dialyzer 10 . An air bubble sensor 211 , a blood pump 212 and a blood component measuring device 60 (liquid component measuring device) are arranged in the arterial line 21 .
The air bubble sensor 211 detects air bubbles contained in the blood flowing inside the arterial line 21 . Blood pump 212 is arranged downstream of air bubble sensor 211 in arterial line 21 . The blood pump 212 pumps out the blood inside the arterial line 21 by squeezing the tube forming the arterial line 21 .
Blood component measuring device 60 is arranged between blood pump 212 and dialyzer 10 in arterial line 21 . The blood component measuring device 60 can measure the concentrations of blood components in blood passing through the arterial line 21 of the blood circuit 20 in real time to calculate the hematocrit value and the oxygen saturation. The blood component measuring device 60 will be detailed later.

One end of the venous line 22 is connected to the blood outlet 112 of the dialyzer 10, and the other end is connected to the vein of the subject (dialysis patient). A venous pressure sensor 221 , a venous chamber 222 , an air bubble sensor 223 , and a venous clamp 224 are arranged on the venous line 22 .
Venous pressure sensor 221 detects the pressure of blood flowing through venous line 22 . The venous chamber 222 is arranged downstream of the venous pressure sensor 221 in the venous line 22 . The vein side chamber 222 stores a predetermined amount (eg, 20 ml) of blood. The air bubble sensor 223 is arranged downstream of the venous chamber 222 in the venous line 22 . The air bubble sensor 223 detects air bubbles contained in the blood flowing through the venous line 22 . The venous clamp 224 is arranged downstream of the air bubble sensor 223 in the venous line 22 . The venous clamp 224 opens and closes the flow path of the venous line 22 .

The drug line 23 supplies drugs required during hemodialysis to the arterial line 21 . One end (proximal side) of the drug line 23 is connected to a liquid drug pump 231 that delivers drugs, and the other end (distal end) is connected between the blood pump 212 and the blood component measuring device 60 in the arterial line 21 . be done.

One end side (proximal side) of the overflow line 24 is connected to the vein side chamber 222 . The overflow line 24 discharges the physiological saline solution, air, etc. flowing through the intravenous line 22 during the priming process. An overflow clamp 241 is arranged in the overflow line 24 . Overflow clamp 241 opens and closes the flow path of overflow line 24 .

According to the blood circuit 20 described above, the blood drawn from the artery of the subject (dialysis patient) flows through the arterial line 21 by the blood pump 212 and is introduced into the blood-side channel of the dialyzer 10 . The blood introduced into the dialyzer 10 is purified by the dialysate flowing through the dialysate circuit 30, which will be described later, through the dialysis membrane. The blood purified by the dialyzer 10 flows through the venous line 22 and is returned to the subject's veins.

In the present embodiment, the dialysate circuit 30 is configured by a so-called closed capacity control type dialysate circuit 30 . The dialysate circuit 30 includes a dialysate chamber 31, a dialysate supply line 32, a dialysate inlet line 33, a dialysate outlet line 34, a drain line 35, a bypass line 36, and water removal/backfiltration. a pump 37;

The dialysate chamber 31 includes a hard container 311 capable of accommodating a certain volume (eg, 300 ml to 500 ml) of dialysate, and a soft diaphragm 312 that partitions the interior of the container 311 . The inside of the dialysate chamber 31 is partitioned by a diaphragm 312 into a sent liquid containing portion 313 and a drained liquid containing portion 314 .

The dialysate supply line 32 is connected to a dialysate supply device (not shown) at its proximal end and to the dialysate chamber 31 at its distal end. The dialysate supply line 32 supplies the dialysate to the liquid supply storage portion 313 of the dialysate chamber 31 .

The dialysate inlet line 33 connects the dialysate chamber 31 and the dialysate inlet port 113 of the dialyzer 10 , and transfers the dialysate contained in the liquid supply/accommodation portion 313 of the dialysate chamber 31 to the dialysate-side channel of the dialyzer 10 . to be introduced.

The dialysate outlet line 34 connects the dialysate outlet 114 of the dialyzer 10 and the dialysate chamber 31 , and guides the dialysate discharged from the dialyzer 10 to the waste liquid container 314 of the dialysate chamber 31 .
The drainage line 35 is connected to the dialysate chamber 31 at its proximal end and discharges the drainage of the dialysate contained in the drainage storage part 314 .

A bypass line 36 connects the dialysate outlet line 34 and the drain line 35 .
A dewatering/backfiltration pump 37 is arranged in the bypass line 36 . The water removal/backfiltration pump 37 sends the dialysate inside the bypass line 36 in a direction (water removal direction) in which it flows to the drain line 35 side and in a direction (backfiltration direction) in which it flows to the dialysate lead-out line 34 side. It consists of a liquid-driven pump.

The control device 50 is configured by an information processing device (computer), and controls the operation of the hemodialysis apparatus 1 by executing a control program.
Specifically, the control device 50 controls the operations of various pumps, clamps, and the like arranged in the blood circuit 20 and the dialysate circuit 30, and various processes performed by the hemodialyzer 1 (operation (dialysis) process , washing step, priming step, blood removal step, fluid replacement step, blood return step, etc.).
In addition, the control device 50 is based on the hematocrit value and the oxygen saturation calculated from the concentrations of the blood components of the blood flowing through the arterial line 21 of the blood circuit 20 measured by the blood component measuring device 60, which will be described later. Precursors of blood pressure drop are analyzed and, for example, a display device or the like is used to inform the outside of the signs that blood pressure will drop.

The blood component measuring device 60 will be described.
The blood component measuring device 60 is a device that measures the hematocrit value and oxygen saturation of blood flowing through the arterial line 21 of the blood circuit 20 during hemodialysis. By measuring the concentrations of the blood components in the blood flowing through the arterial line 21 with the blood component measuring device 60 and calculating the hematocrit value and the oxygen saturation, it is possible to analyze signs of blood pressure drop.

In the description of this embodiment, the width direction of the blood component measuring device 60 (horizontal direction in FIG. 2) is referred to as a first direction D1, and in the first direction D1, one side (left side in FIG. 2) is a side D11. , and the other side (the right side in FIG. 2) is called the other side D12. Also, the thickness direction of the blood component measuring device 60 (the direction through the paper surface of FIG. 2, the left-right direction in FIG. 5) is referred to as a second direction D2. Further, the height direction of the blood component measuring device 60 (vertical direction in FIG. 2) is referred to as a third direction D3, one side (lower side in FIG. 2) in the third direction D3 is referred to as a side D31, and the other side. (the upper side in FIG. 2) is called the other side D32.

The blood component measuring device 60, as shown in FIGS. 2 and 3, includes a sensor clip 70 and a blood chamber 90 (liquid container). Blood chamber 90 is removably attached to sensor clip 70 .

As shown in FIGS. 4 and 5, the sensor clip 70 includes a first component portion 71 in which the first sensor portion 81 is arranged, a second component portion 75 in which the second sensor portion 82 is arranged, and a spring member 782. (biasing member); The first sensor section 81 and the second sensor section 82 constitute the sensor section 80 . The first sensor unit 81 is provided with a light emitting element 812a. The second sensor section 82 is provided with a light receiving element 822a.

In the sensor section 80, a light-emitting element 812a and a light-receiving element 822a are arranged facing each other, and the light-emitting element 812a emits light while the sensor clip 70 sandwiches the blood chamber 90 therebetween. Light of a plurality of wavelengths is emitted from the light emitting element 812a to the blood flowing through the blood chamber 90, and the concentration of blood components can be measured based on the difference in transmittance between red blood cells and water in the blood.
In addition, in order to ensure a stable detection output in detecting the transmittance of light in the sensor unit 80, it is effective to irradiate the blood flow path of the blood chamber 90 with light perpendicularly. The blood component measuring device 60 of this embodiment has a structure that allows the blood chamber 90 to be properly attached to the sensor clip 70 . The structure of the blood component measuring device 60 will be described in detail below.

The first component portion 71 and the second component portion 75 are combined so as to partially overlap each other, and both are configured to have open portions 721 and 761 that open on one side D11 in the first direction D1. be. A blood chamber 90 is arranged in the gap S formed by the overlapping portions of the openings 721 and 761 . Blood chamber 90 is detachably installed between first component portion 71 and second component portion 75, with blood chamber 90 disposed between light emitting element 812a and light receiving element 822a of sensor portion 80. Attached. The first constituent portion 71 and the second constituent portion 75 constitute an attachment portion to which the blood chamber 90 is detachably attached. The first constituent portion 71 and the second constituent portion 75 move relative to each other in the third direction D3 so as to adjust the distance of the gap S formed between the overlapping portions of the open portions 721 and 761. placed as possible.

The first component portion 71 has a first case main body 72, a first cell holding portion 73, and a first sensor portion 81, as shown in FIGS.

The first case main body 72 is formed in a substantially C shape with one side D11 opened in the first direction D1, and is formed like a case having an accommodating portion inside. Most of the first case main body 72 is covered with the second case main body 76 on the other side D32 in the third direction D3, and the end portion on the one side D31 in the third direction D3 is exposed to the outside. do.

The first case main body 72 has an opening portion 721 (insertion opening portion) and a closing portion 722, as shown in FIG.
The open portion 721 is formed near the center of the first case main body 72 in the third direction D3 so that one side D11 in the first direction D1 (width direction) is open. Blood chamber 90 can be inserted into opening 721 .
The closing portion 722 is formed near the center of the first case main body 72 in the third direction D3 at the end of the opening portion 721 on the other side D12 in the first direction D1 to close the opening portion 721 . The closing portion 722 has a restricting portion 722a.

The restricting portion 722a is formed on the inner edge of the closing portion 722 on the D11 side in the first direction D1 and extends in the third direction D3. The regulating portion 722a regulates the position of the end portion of the tip side collar portion 92 (described later) of the blood chamber 90 on the tip side in the insertion direction.

An outer surface portion of the first case main body 72 on one side D31 in the third direction D3 constitutes a first grip portion 723, as shown in FIG. A plurality of non-slip projections 723a extending in the second direction D2 are formed on the other side D12 of the first gripping portion 723 in the first direction D1.

The surface of the first case body 72 on the farthest side D32 in the third direction D3 is covered with the second case body 76, and the surface (outer surface) of the first case body 72 on the farthest side D32 in the third direction D3. A concave first case side spring member placement portion 724 is formed in the . One end side of a spring member 782 (described later) that can expand and contract in the third direction D3 is arranged in the first case side spring member arrangement portion 724 .

The first cell holding portion 73 is arranged at the edge of the open portion 721 of the first case main body 72 on the other side D32 in the third direction D3. The first cell holding portion 73 holds the portion of the blood chamber 90 on the other side D32 in the third direction D3 when the blood chamber 90 is attached to the sensor clip 70 . The first cell holding portion 73 is formed in the shape of a case having an accommodating portion inside. The first cell holding portion 73 is configured integrally with the first case main body 72 .
As shown in FIGS. 6A and 6B, the first cell holding portion 73 has a first convex portion 731 (clip-side first fitting portion) that protrudes to one side D31 in the third direction D3. The first sensor portion 81 is arranged inside the first convex portion 731 .

The first projecting portion 731 is formed in a projecting shape, and as shown in FIGS. 6A and 6B, a pair of first component side curved portions 731a (clip side curved surface portions) and a pair of first component portion side straight line portions 731a (clip side curved surface portions). and a shaped portion 731b.
The pair of first component-side curved portions 731a are formed on the front end side (the other side D12 in the first direction D1) and the rear end side in the insertion direction when the blood chamber 90 in the first convex portion 731 is attached to the sensor clip 70. It is formed in an arc shape (curved surface shape) projecting to both sides (one side D11 in the first direction D1).
The pair of first component side linear portions 731b are formed at both end portions of the first convex portion 731 in the second direction D2 and formed in a linear shape extending in the first direction D1.

A surface of the first convex portion 731 on one side D31 in the third direction D3 is formed in a planar shape extending in the first direction D1 and the second direction D2, and a circular shape penetrating in the third direction D3 is formed in the center. An opening 733 is formed.

The first sensor portion 81 is arranged inside the first convex portion 731 of the first cell holding portion 73 , as shown in FIGS. 4 and 5 . The first sensor section 81 has a first sensor case 811 and a first sensor substrate 812 on which a light emitting element 812a (light emitting section) is mounted.

The first sensor case 811 holds the first sensor substrate 812 inside the first protrusion 731 . The light emitting element 812a mounted on the first sensor substrate 812 is arranged to face the circular opening 733 side, and irradiates the liquid flowing in the blood chamber 90 with light. At least a portion of the first sensor case 811 facing the light emitting element 812a is configured to transmit light from the light emitting element 812a.

The second component portion 75 has a second case main body 76, a second cell holding portion 77, and a second sensor portion 82, as shown in FIGS.

The second case main body 76 is formed in a substantially C-shape with one side D11 opened in the same first direction D1 as the first case main body 72, and is formed like a case having an accommodating portion inside. The second case main body 76 is arranged so as to cover the portion of the first case main body 72 of the first component 71 on the other side D32 in the third direction D3.

The second case main body 76 has an opening portion 761 (insertion opening portion) and a closing portion 762 .
The open portion 761 is formed near the center of the second case main body 76 in the third direction D3 so that one side D11 in the first direction D1 is open. Blood chamber 90 can be inserted into opening 761 .
The closing portion 762 is formed near the center of the second case main body 76 in the third direction D3 at the end of the opening portion 761 on the other side D12 in the first direction D1 to close the opening portion 761 .

An outer surface portion of the second case main body 76 on the other side D32 in the third direction D3 constitutes a second grip portion 763, as shown in FIG. A plurality of non-slip protrusions 763a extending in the second direction D2 are formed on the other side D12 of the second grip portion 763 in the first direction D1.

A concave second case side spring member placement portion 764 is formed on the surface of the one side D31 that is the inner surface of the plate portion formed on the most other side D32 in the third direction D3 of the second case body 76 . The other end side of a spring member 782 (described later) that can expand and contract in the third direction D3 is arranged in the second case side spring member arrangement portion 764 .

The open portion 761 of the second case main body 76 and the open portion 721 of the first case main body 72 are partially overlapped to form a gap S in which a blood chamber 90, which will be described later, is arranged. The first case body 72 and the second case body 76 are configured to be movable relative to each other in the third direction D3, and the distance of the gap S is changed by a distance adjustment mechanism 78, which will be described later. It is possible.

The second cell holding portion 77 is arranged at the edge of the open portion 761 of the second case main body 76 on the one side D31 in the third direction D3. The second cell holding portion 77 holds a portion of the blood chamber 90 on one side D31 in the third direction D3 when the blood chamber 90 is attached to the sensor clip 70 . The second cell holding portion 77 is formed in the shape of a case having an accommodating portion inside. The second cell holding portion 77 is configured separately from the second case main body 76 . The second cell holding portion 77 is fixed to the second case body 76 by engaging with the second case body 76 . As a result, the second case main body 76 and the second cell holding portion 77 move together.

As shown in FIGS. 7A and 7B, the second cell holding portion 77 has a second convex portion 771 (clip-side second fitting portion) that protrudes to the other side D32 in the third direction D3. A second sensor portion 82 is arranged on the inner side of the second convex portion 771 . The second convex portion 771 is formed to face the first convex portion 731 of the first cell holding portion 73 of the first component portion 71 .

The second convex portion 771 is formed in a convex shape and has a pair of second component side curved portions 771a (clip side curved portions) and a pair of second component side linear portions 771b.
The pair of second component-side curved portions 771a are formed on the front end side (the other side D12 in the first direction D1) and the rear end side in the insertion direction when the blood chamber 90 in the second convex portion 771 is attached to the sensor clip 70. It is formed in an arc shape (curved surface shape) projecting to both sides (one side D11 in the first direction D1).
The pair of second component side linear portions 771b are formed at both ends of the second convex portion 771 in the second direction D2 and formed in a linear shape extending in the first direction D1.

The surface of the second convex portion 771 on the other side D32 in the third direction D3 is formed in a planar shape extending in the first direction D1 and the second direction D2, and has a circular shape penetrating in the third direction D3 at the center. An opening 773 is formed. The circular opening 773 of the second protrusion 771 is arranged to face the circular opening 733 of the first protrusion 731 .

The second sensor portion 82 is arranged inside the second convex portion 771 of the second cell holding portion 77 , as shown in FIGS. 4 and 5 . The second sensor section 82 has a second sensor case 821 and a second sensor substrate 822 on which a light receiving element 822a (light receiving section) is mounted.

The second sensor case 821 holds the second sensor substrate 822 inside the second protrusion 771 . The light receiving element 822a mounted on the second sensor substrate 822 is arranged to face the circular opening 773 side, and is arranged to face the light emitting element 812a held by the first sensor case 811 of the first sensor section 81. be done. The light receiving element 822 a receives light emitted from the light emitting element 812 a and transmitted through the liquid flowing through the blood chamber 90 . At least a portion of the second sensor case 821 facing the light receiving element 822a is configured to transmit light from the light emitting element 812a arranged facing the light receiving element 822a.

The first case main body 72 and the second case main body 76 described above are combined with each other so as to be relatively movable in the third direction D3. The first case main body 72 and the second case main body 76 can move relative to each other in the third direction D3 in a portion where the open portion 721 of the first case main body 72 and the open portion 761 of the second case main body 76 overlap. , a gap S whose distance can be adjusted is formed, and the blood chamber 90 is arranged in the gap S so as to be detachable from the sensor clip 70 .

As shown in FIG. 7A, the first case body 72 and the second case body 76 are guided by a guide mechanism 781 so as to be relatively movable in the third direction D3. In this embodiment, the guide mechanism 781 includes a guide groove 781a formed in the first case body 72 and extending in the third direction D3, and a guide groove 781a fixed to the second case body 76 and extending in the third direction D3 and extending along the guide groove 781a. and a guide plate 781b that can be moved by The guide mechanism 781 may be, for example, a mechanism that guides the first case body 72 and the second case body 76 so as to be relatively movable in the third direction D3. , for example, a guide plate, a guide groove, a guide hole, a guide projection, or the like.

In this embodiment, when the first case body 72 and the second case body 76 are combined with each other, the guide mechanism 781 maintains the parallel state of the light emitting element 812a and the light receiving element 822a. It is configured to be relatively movable in three directions D3. This makes it possible to change the distance between the light emitting element 812a and the light receiving element 822a while maintaining the parallel state between the light emitting element 812a and the light receiving element 822a.

As shown in FIG. 4, the spring member 782 is positioned between the first component portion 71 and the second component portion 75 on the other side D32 of the second component portion 75 in the third direction D3. It is arranged so that it can be expanded and contracted. One end of the spring member 782 is arranged in the first case side spring member arrangement portion 724 of the first case main body 72 and the other end is arranged in the second case side spring member arrangement portion 764 of the second case main body 76 . .

In this embodiment, the spring member 782 causes the light emitting element 812a and the light receiving element 822a to be parallel to each other in the gap S formed by the open portion 761 of the second case main body 76 and the open portion 721 of the first case main body 72. is maintained, the distance between the light-emitting element 812a and the light-receiving element 822a is urged to become smaller. As a result, with the blood chamber 90 arranged in the gap S, the blood chamber 90 is sandwiched between the first case body 72 and the second case body 76 by the biasing force of the spring member 782 .
The guide mechanism 781 and the spring member 782 described above constitute a distance adjustment mechanism 78 capable of adjusting the distance between the light emitting element 812a and the light receiving element 822a.

The blood chamber 90 constitutes a liquid containing cell (liquid containing portion) having a cell for containing blood (liquid) therein. As shown in FIGS. 3, 8A, and 8B, the blood chamber 90 includes a container main body 91 containing blood (liquid), a front-end flange 92 (extending portion), and a rear-end flange 93. , a blood inlet connection 94 and a blood outlet connection 95 .

As shown in FIG. 3, the container body 91 has a disk-like outer shape with a thickness in the third direction D3. A channel through which blood flows is formed inside the container body 91 . The container body 91 is detachably attached to the sensor clip 70 in the gap S between the light emitting element 812 a and the light receiving element 822 a of the sensor clip 70 .

As shown in FIG. 8A, a first cell-side concave portion 911 (accommodating portion-side first fitting portion) is formed on the surface of the container body 91 on the other side D32 in the third direction D3. The first cell-side recessed portion 911 is formed in a recessed shape, and is recessed to one side D31 on the surface on the other side D32 in the third direction D3. A first cell-side circular wall surface 911 a rising in the second direction D<b>2 is formed at the peripheral edge of the first cell-side concave portion 911 . The first cell-side circular wall surface 911a is formed in a circular shape as a whole when viewed in the third direction D3.

In the present embodiment, the first cell-side circular wall surface 911a is formed by continuously forming two first cell-side curved surface portions 911b (receiving portion-side curved surface portions) in a circular shape when viewed in the third direction D3. be. The first cell-side curved surface portion 911b is formed on the rear end side (one side D11 in the first direction D1) and the front end side (first It is formed in an arc shape (curved surface shape) recessed on both sides of the other side D12 in the direction D1). The first cell-side circular wall surface 911a has an arc shape ( curved surface). Note that the two first cell-side curved surface portions 911b (cell-side curved surface portions) may not be formed continuously in a circular shape, and may be formed with a linear portion interposed therebetween.

The first convex portion 731 (see FIGS. 4 and 5) of the first component portion 71 of the sensor clip 70 can be fitted into the first cell-side concave portion 911 . When the blood chamber 90 is attached to the sensor clip 70 , the first cell-side concave portion 911 is fitted to the first convex portion 731 while facing the first convex portion 731 .

As shown in FIG. 8B, a second cell-side concave portion 912 (accommodating portion-side first fitting portion) is formed on the surface of the container body 91 on the other side D32 in the third direction D3. The second cell-side recessed portion 912 is formed in a concave shape, and is recessed toward the other side D32 on the surface of the one side D31 in the third direction D3. A second cell-side circular wall surface 912a rising in the second direction D2 is formed at the periphery of the second cell-side concave portion 912 . The second cell-side circular wall surface 912a is formed in a circular shape as a whole when viewed in the third direction D3.

The second cell-side circular wall surface 912a is formed by continuously forming two second cell-side curved surface portions 912b (accommodating portion-side curved surface portions) in a circular shape when viewed in the third direction D3. The second cell-side curved surface portion 912b is formed on the rear end side (one side D11 in the first direction D1) and the front end side (first It is formed in an arc shape (curved surface shape) recessed on both sides of the other side D12 in the direction D1). The second cell-side circular wall surface 912a has an arc shape ( curved surface). The two second cell-side circular wall surfaces 912a (accommodating portion-side curved surface portions) may not be formed continuously in a circular shape, and may be formed with a linear portion interposed therebetween.

The second convex portion 771 (see FIGS. 4 and 5) of the second component portion 75 of the sensor clip 70 can be fitted into the second cell-side concave portion 912 . When blood chamber 90 is attached to sensor clip 70 , second cell-side concave portion 912 engages with second convex portion 771 while facing second convex portion 771 .

As shown in FIGS. 8A and 8B, the distal collar portion 92 is formed on the distal side in the insertion direction when attaching the blood chamber 90 to the sensor clip 70 . The distal collar portion 92 extends distally in the insertion direction when the blood chamber 90 is inserted into the gap S (opening portions 721 and 761 ) of the sensor clip 70 . In the present embodiment, the tip side collar portion 92 extends from the end portion of the container body 91 on the other side D12 in the first direction D1 to the other side D12.
When the blood chamber 90 is inserted into the gap S of the sensor clip 70 and attached, the distal flange 92 is formed on the closing portion 722 of the first case main body 72 of the sensor clip 70 as shown in FIG. The restricting portion 722a restricts the position of the distal end of the distal flange 92 of the blood chamber 90 in the insertion direction.

As shown in FIGS. 8A and 8B, the rear-end side flange 93 is formed on the rear-end side in the insertion direction when attaching the blood chamber 90 to the sensor clip 70 . In the present embodiment, the rear end-side collar portion 93 extends from the end portion of the container main body 91 on the one side D11 in the first direction D1 to the one side D11 in the first direction D1.

The blood introduction connection part 94 is an introduction part for introducing blood into the blood component measuring device 60 and is formed to extend cylindrically at one end of the blood chamber 90 in the second direction D2. The blood introduction connecting part 94 is connected to the downstream end of the line connecting the blood pump 212 and the blood component measuring device 60 in the arterial line 21 (see FIG. 1).

Blood lead-out connection part 95 is a lead-out part for leading the blood that has flowed inside blood component measuring device 60 toward dialyzer 10, and extends cylindrically at the other end of blood chamber 90 in second direction D2. It is formed. The blood lead-out connection part 95 is connected to the upstream end of the line connecting the blood component measuring device 60 and the dialyzer 10 in the arterial line 21 .

In the blood component measuring device 60 described above, a gap S into which the blood chamber 90 can be inserted is formed between the first sensor section 81 and the second sensor section 82 . The gap S is formed by the overlapping portion of the open portion 721 of the first case main body 72 and the open portion 761 of the second case main body 76. The gap S is formed by the distance adjusting mechanism 78 (the guide mechanism 781 and the spring member 782). distance is adjustable. When the blood chamber 90 is attached to the sensor clip 70 , the container body 91 of the blood chamber 90 is arranged in the gap S between the first sensor section 81 and the second sensor section 82 . With the blood chamber 90 attached to the sensor clip 70, the hematocrit value and the oxygen saturation are calculated from the concentrations of the blood components in the blood detected by the first sensor section 81 and the second sensor section 82. The calculated hematocrit value and oxygen saturation are sent to the control device 50 .

Next, a method for attaching the blood component measuring device 60 to the arterial line 21 will be described.
First, when attaching the blood component measuring device 60 to the arterial line 21, the blood chamber 90 is connected in the middle of the arterial line 21, as shown in FIG.

Subsequently, blood chamber 90 is attached to sensor clip 70 . In this case, first, force is applied to the first component portion 71 and the second component portion 75 so that the first gripping portion 723 and the second gripping portion 763 approach each other so as to resist the biasing force of the spring member 782 . By applying the force, the distance of the gap S is increased while maintaining the parallel state.

Next, by inserting the blood chamber 90 into the gap S of the sensor clip 70 and relaxing the force applied to the first gripping portion 723 and the second gripping portion 763, the urging force of the spring member 782 causes the first configuration to move. The portion 71 and the second component portion 75 are moved so that the distance of the gap S becomes smaller. Then, the first cell-side concave portion 911 of the blood chamber 90 is fitted to the first convex portion 731 of the sensor clip 70 , and the second cell-side concave portion 912 of the blood chamber 90 is fitted to the second convex portion 771 of the sensor clip 70 . match. Accordingly, the blood chamber 90 can be attached to the sensor clip 70 by sandwiching the blood chamber 90 in the gap S of the sensor clip 70 .

Here, when attaching the blood chamber 90 to the sensor clip 70 , the first protrusion 731 and the second protrusion 771 of the sensor clip 70 are aligned with the first cell-side recess 911 and the second cell-side recess 912 of the blood chamber 90 . Since it is fitted to the , it is possible to improve the ease of installation.

Further, even when the first cell-side recessed portion 911 and the second cell-side recessed portion 912 are loosely attached to the first protrusion 731 and the second protrusion 771, the first component-side curved surface portion 731a and the second The component-side curved portion 771a slides along the first cell-side curved portion 911b and the second cell-side curved portion 912b. Therefore, when attaching the blood chamber 90 to the sensor clip 70 , the first protrusion 731 and the second protrusion 771 of the sensor clip 70 fit into the first cell-side recess 911 and the second cell-side recess 912 of the blood chamber 90 . Since it is fitted by sliding, the ease of attachment can be further improved.

In addition, since the restricting portion 722a is provided, the position of the distal end of the tip-side collar portion 92 of the blood chamber 90 in the insertion direction is restricted by the restricting portion 722a. Therefore, movement of the blood chamber 90 toward the closing portion 722 is restricted by the restricting portion 722a, and the blood chamber 90 can be positioned at the predetermined insertion position in the first direction D1.
Further, for example, in the case where the distal end portion of the distal side collar portion 92 of the blood chamber 90 is regulated by the restricting portion 722a, even if the blood chamber 90 tries to rotate, the distal end portion of the distal side collar portion 92 of the blood chamber 90 does not move. Rotation of the blood chamber 90 can be regulated by contacting the regulating portion 722a.

Next, when removing the blood chamber 90 from the sensor clip 70 , the first component 71 and the second component 75 are held together by the first gripping portion 723 and the second gripping portion 723 so as to resist the biasing force of the spring member 782 . By applying a force so as to approach the portion 763, the distance of the gap S is increased while maintaining the parallel state. As a result, the blood chamber 90 can be removed from the sensor clip 70 while the distance of the gap S is increased.

According to the sensor clip 70 and the blood component measuring device 60 of this embodiment described above, the following effects are obtained.

(1) Sensor unit 80 having light emitting element 812a and light receiving element 822a disposed facing light emitting element 812a, and distance between light emitting element 812a and light receiving element 822a can be adjusted. and a blood chamber 90 detachably attached to the sensor clip 70. The distance adjustment mechanism 78 adjusts the parallel state of the light emitting element 812a and the light receiving element 822a. It is possible to change the distance while maintaining, and the blood chamber 90 has a channel through which blood flows and is detachably attached between the light emitting element 812 a and the light receiving element 822 a of the sensor clip 70 .
As a result, the distance adjusting mechanism 78 can change the distance while maintaining the parallel state between the light emitting element 812a and the light receiving element 822a, and the blood chamber 90 can be attached and detached. Degradation of the sensor clip 70 and the blood component measuring device 60 can be suppressed more than the configuration in which the blood chamber 90 is attached and detached by opening the part.

(2) The distance adjusting mechanism 78 has a spring member 782 that biases the distance between the light emitting element 812a and the light receiving element 822a in a state where the light emitting element 812a and the light receiving element 822a are kept parallel to each other. Configured. As a result, the blood chamber 90 can be easily attached and detached between the light emitting element 812 a and the light receiving element 822 a of the sensor clip 70 by being biased by the spring member 782 .

(3) The sensor clip 70 is composed of a first convex portion 731 having a light emitting element 812a arranged on the inner side and a second convex portion formed opposite to the first convex portion 731 and having a light receiving element 822a arranged on the inner side. 771 , and the blood chamber 90 is fitted to the first convex portion 731 while facing the first convex portion 731 when the blood chamber 90 is attached to the sensor clip 70 . It is configured to have a concave portion 911 and a second cell-side concave portion 912 that is arranged to face the second convex portion 771 and that fits into the second convex portion 771 .
As a result, when attaching the blood chamber 90 to the sensor clip 70 , the first protrusion 731 and the second protrusion 771 of the sensor clip 70 are aligned with the first cell-side recess 911 and the second cell-side recess 912 of the blood chamber 90 . Since it is fitted to the , it is possible to improve the ease of installation.

(4) The curved first component side curved portion 731a that protrudes toward both the distal end side and the rearward end side in the insertion direction when the blood chamber 90 is attached to the sensor clip 70 is used as the first convex portion 731. and the first cell-side concave portion 911 has a curved surface shape that is recessed on both the rear end side and the front end side in the insertion direction when the blood chamber 90 is attached to the sensor clip 70, and is curved on the first component side. The first cell-side curved surface portion 911b is formed in a curved surface shape corresponding to the portion 731a. In addition, the second convex portion 771 has a curved second component side curved portion 771a that protrudes toward both the rear end side and the front end side in the insertion direction when the blood chamber 90 is attached to the sensor clip 7b. The second cell-side concave portion 912 is a second component-side curved portion that is concave to both the distal end side and the rear end side in the insertion direction when the blood chamber 90 is attached to the sensor clip 70. The second cell-side curved surface portion 912b is formed in a curved surface shape corresponding to 771a.

As a result, even when the first cell-side recessed portion 911 and the second cell-side recessed portion 912 are loosely attached to the first convex portion 731 and the second convex portion 771, the first component-side curved surface portion 731a and the second cell-side curved portion 731a The second component side curved portion 771a slides along the first cell side curved portion 911b and the second cell side curved portion 912b. Therefore, when attaching the blood chamber 90 to the sensor clip 70 , the first protrusion 731 and the second protrusion 771 of the sensor clip 70 fit into the first cell-side recess 911 and the second cell-side recess 912 of the blood chamber 90 . Since the blood chamber 90 is slip-fitted, repetitive reattachment of the blood chamber 90 is reduced, and attachment can be reliably and stably performed. Therefore, when attaching the blood chamber 90 to the sensor clip 70, the ease of attachment can be further improved, and the work time for attachment can be shortened.

(5) The first convex portion 731 (clip-side first fitting portion) and the second convex portion 771 (clip-side second fitting portion) of the sensor clip 70 are formed in a convex shape to form the first cell of the blood chamber 90. The side recessed portion 911 (accommodating portion side first fitting portion) and the second cell side recessed portion 912 (accommodating portion side second fitting portion) are formed in a concave shape. As a result, the sensor clip 70 and the blood chamber 90 can be easily fitted at the convex and concave fitting portions, so that the ease of attaching the blood chamber 90 to the sensor clip 70 can be further improved. .

(6) The sensor clip 70 has an opening 721 formed by opening one side D11 in the first direction D1 (width direction) and into which the blood chamber 90 can be inserted, and the other side D11 in the first direction D1 (width direction). and a closing portion 722 that closes the opening 721 at the side end, and a distal side collar portion 92 that extends toward the distal side in the insertion direction when the blood chamber 90 is inserted into the opening 721 . 2, the closing portion 722 is configured to have a restricting portion 722a that restricts the position of the distal end of the tip-side collar portion 92 of the blood chamber 90 in the insertion direction.
As a result, movement of the blood chamber 90 toward the closing portion 722 is restricted by the restricting portion 722 a , the blood chamber 90 can be positioned at a predetermined insertion position, and the blood chamber 90 can be reliably attached to the sensor clip 70 . can be done.

Further, for example, in the case where the distal end portion of the distal side collar portion 92 of the blood chamber 90 is regulated by the restricting portion 722a, even if the blood chamber 90 tries to rotate, the distal end portion of the distal side collar portion 92 of the blood chamber 90 does not move. Rotation of the blood chamber 90 can be regulated by contacting the regulating portion 722a.

Although preferred embodiments of the sensor clip 70 and the blood component measuring device 60 of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate.
For example, in the above-described embodiment, an example in which the liquid component measuring device is applied to the blood component measuring device 60 that measures the hematocrit value has been described, but the present invention is not limited to this. That is, the liquid component measuring device may be configured to measure values other than the hematocrit value in blood, or may be configured to measure components of liquids other than blood.

Further, in the above-described embodiment, the sensor clip 70 has the first convex portion 731 (clip-side first fitting portion) and the second convex portion 771 (clip-side second fitting portion) formed in a convex shape. Although the first cell-side recess 911 (accommodating portion-side first fitting portion) and the second cell-side recess 912 (accommodating portion-side second fitting portion) are formed in concave shapes, the present invention is not limited to this. The uneven shape of the fitting portion between the sensor clip 70 and the blood chamber 90 may be reversed. Further, the shape of the fitting portion between sensor clip 70 and blood chamber 90 is not limited to an uneven shape.

Moreover, in the above-described embodiment, the liquid containing portion that is detachably attached to the sensor clip 70 is configured by the blood chamber 90 that includes cells for containing liquid therein, but the present invention is not limited to this. For example, the liquid containing portion detachably attached to the sensor clip 70 may be configured with a tube through which the liquid flows.

Further, in the above-described embodiment, the clip-side curved surface portion (first configuration The part-side curved part 731a and the second component part-side curved part 771a) are formed in a curved shape protruding to both the front end side and the rear end side in the insertion direction when the sensor clip 70 is attached. is not limited to The clip side curved surface portion (the first component side curved surface portion 731a, the second component portion side curved surface portion 771a) may be formed in a curved surface shape that protrudes only toward one of the front end side and the rear end side in the insertion direction. . In this case, the clip-side curved surface portion (first configuration The corresponding cell-side curved surface portions (the first cell-side curved surface portion 911b and the second cell-side curved surface portion 912b) are provided in the portions corresponding to the (part-side curved surface portion 731a, the second component-side curved surface portion 771a) and fitted into each other. is preferably formed.

Further, in the above-described embodiment, in the sensor section 80, the light emitting section is provided in the first constituent section 71 and the light receiving section is provided in the second constituent section 75, but the present invention is not limited to this. Conversely, the light-emitting portion may be provided in the second component portion 75 and the light-receiving portion may be provided in the first component portion 71 .

Further, in the above-described embodiment, the blood component measuring device 60 is arranged between the blood pump 212 and the dialyzer 10 in the arterial line 21, but the present invention is not limited to this. The blood component measuring device 60 may be placed between the subject and the blood pump 212 in the arterial line 21 .

60 blood component measuring device (liquid component measuring device)
70 sensor clip 78 distance adjustment mechanism 80 sensor section 90 blood chamber (liquid storage section)
92 Tip side flange (extending portion)
721 opening (insertion opening)
722 closing portion 722a restricting portion 731 first convex portion (clip-side first fitting portion)
731a first component side curved portion (clip side curved portion)
761 opening (insertion opening)
762 Closing portion 771 Second convex portion (second fitting portion on the clip side)
771a second component side curved portion (clip side curved portion)
782 spring member (biasing member)
812a Light-emitting element (light-emitting part)
822a light receiving element (light receiving part)
911 first cell-side concave portion (accommodating portion-side first fitting portion)
911b First cell-side curved surface portion (accommodating portion-side curved surface portion)
912 Second cell-side concave portion (accommodating portion-side second fitting portion)
912b Second cell-side curved surface portion (accommodating portion-side curved surface portion)

Claims (10)

a sensor unit having a light emitting unit and a light receiving unit arranged to face the light emitting unit;
a mounting portion to which the liquid containing portion is detachably mounted while the liquid containing portion is disposed between the light emitting portion and the light receiving portion;
a first case in which either one of the light emitting unit and the light receiving unit is arranged;
a second case arranged in a state overlapping with a part of the first case, in which the other of the light emitting unit and the light receiving unit is arranged;
A sensor clip comprising a distance adjustment mechanism capable of adjusting the distance between the light emitting unit and the light receiving unit,
The distance adjusting mechanism has a biasing member that biases the distance between the light emitting unit and the light receiving unit to be smaller while maintaining the parallel state of the light emitting unit and the light receiving unit,
The biasing member is arranged inside the first case or the second case,
By adjusting the positional relationship between the first case and the second case, the distance adjustment mechanism maintains the parallel state of the light emitting unit and the light receiving unit by the biasing force of the biasing member. A sensor clip capable of varying said distance. The sensor clip includes a first clip-side fitting portion in which the light-emitting portion is arranged, and a clip-side first fitting portion formed opposite to the first clip-side fitting portion and inside in which the light receiving portion is arranged. a second fitting portion;
The liquid storage portion has a storage portion-side first fitting portion that fits into the clip-side first fitting portion in a state facing the clip-side first fitting portion when the liquid storage portion is attached to the sensor clip. 1 fitting portion, and a housing portion side second fitting portion that fits into the clip side second fitting portion while facing the clip side second fitting portion . clip. The clip-side first fitting portion and/or the clip-side second fitting portion have a curved shape protruding toward the front end side and/or the rear end side in the insertion direction when the liquid storage portion is attached to the sensor clip. has a clip-side curved surface of
The first fitting portion on the storage portion side and/or the second fitting portion on the storage portion side have a curved surface shape recessed toward the rear end side and/or the front end side in the insertion direction when the liquid storage portion is attached to the sensor clip. 3. The sensor clip according to claim 2 , further comprising a housing portion-side curved surface portion formed in a curved surface shape corresponding to the clip-side curved surface portion. The clip-side first fitting portion and/or the clip-side second fitting portion are formed in a convex shape or a concave shape,
The sensor clip according to claim 2 or 3, wherein the first housing-side fitting portion and/or the second housing-side fitting portion are formed in a concave shape or a convex shape. The sensor clip includes an insertion open portion that is open on one side in the width direction and into which the liquid containing portion can be inserted, and a closing portion that closes the insertion opening portion at the other end in the width direction; has
the liquid containing portion has an extending portion extending toward a distal end side in an insertion direction when the liquid containing portion is inserted into the insertion opening;
The sensor clip according to any one of claims 1 to 4 , wherein the closing portion has a regulating portion that regulates the position of the end portion of the extending portion of the liquid containing portion on the leading end side in the insertion direction. a sensor unit having a light-emitting unit and a light-receiving unit arranged to face the light-emitting unit; a first case in which either the light-emitting unit or the light-receiving unit is arranged; and a part of the first case A sensor clip having a second case arranged in an overlapping state, in which the other of the light emitting unit and the light receiving unit is arranged, and a distance adjusting mechanism capable of adjusting the distance between the light emitting unit and the light receiving unit. and,
A liquid component measuring device comprising: a liquid containing portion detachably attached to the sensor clip,
The distance adjusting mechanism has a biasing member that biases the distance between the light emitting unit and the light receiving unit to be smaller while maintaining the parallel state of the light emitting unit and the light receiving unit,
The biasing member is arranged inside the first case or the second case,
By adjusting the positional relationship between the first case and the second case, the distance adjustment mechanism maintains the parallel state of the light emitting unit and the light receiving unit by the biasing force of the biasing member. it is possible to vary the distance,
The liquid component measuring device, wherein the liquid containing section has a flow path through which liquid flows, and is detachably attached between the light emitting section and the light receiving section of the sensor clip. The sensor clip includes a first clip-side fitting portion in which the light-emitting portion is arranged, and a clip-side first fitting portion formed opposite to the first clip-side fitting portion and inside in which the light receiving portion is arranged. a second fitting portion;
The liquid storage portion has a storage portion-side first fitting portion that fits into the clip-side first fitting portion in a state facing the clip-side first fitting portion when the liquid storage portion is attached to the sensor clip. 7. The liquid according to claim 6 , further comprising: a first fitting portion, and a second accommodating portion-side fitting portion that fits into the second clip-side fitting portion while facing the second clip-side fitting portion. Component measuring device. The clip-side first fitting portion and/or the clip-side second fitting portion have a curved shape protruding toward the front end side and/or the rear end side in the insertion direction when the liquid storage portion is attached to the sensor clip. has a clip-side curved surface of
The first fitting portion on the storage portion side and/or the second fitting portion on the storage portion side have a curved surface shape recessed toward the rear end side and/or the front end side in the insertion direction when the liquid storage portion is attached to the sensor clip. 8. The liquid component measuring device according to claim 7 , further comprising an accommodating portion-side curved surface portion formed in a curved surface shape corresponding to the clip-side curved surface portion. The clip-side first fitting portion and/or the clip-side second fitting portion are formed in a convex shape or a concave shape,
The liquid component measuring device according to claim 7 or 8, wherein the first fitting portion on the side of the storage portion and/or the second fitting portion on the side of the storage portion are formed in a concave shape or a convex shape. The sensor clip includes an insertion open portion that is open on one side in the width direction and into which the liquid containing portion can be inserted, and a closing portion that closes the insertion opening portion at the other end in the width direction; has
the liquid containing portion has an extending portion extending toward a distal end side in an insertion direction when the liquid containing portion is inserted into the insertion opening;
10. The liquid component measuring device according to any one of claims 6 to 9 , wherein the closing portion has a regulating portion that regulates the position of the end portion of the extending portion of the liquid containing portion on the leading end side in the insertion direction.

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