JPH1014906A - Humor analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable continuous measurement automatically by arranging a puncturing means made up of a longitudinally movable puncturing blade or puncturing needle and a linear motion type solenoid set on the extension thereof. SOLUTION: A puncturing part is provided with a sleeve 6 and a plate-shaped base body 7 housed into the sleeve 6. A puncturing blade 71 is provided longitudinally movable on one side of the base body 7. An electrode chip 72 is provided on the other side thereof and an electrode lead is connected to a terminal part of the electrode chip 72. A linear motion type solenoid 9 arranged facing the puncturing blade 71. With a puncturing switch ON, the solenoid 9 is operated and an arm 8 is advanced to move the puncturing blade 71 forward sticking it to a position ahead of an electronic chip 72 in a state where the finger is mounted on a humor analyzer. The degree of protrusion of the puncturing blade is so set that a finger is punctured to let humor bring into contact with the electrode chip 72 in a state where the finger is mounted on a humor analyzer. One side of an electrode of the electrode chip 72 is coated with an enzyme ink.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body fluid analyzer capable of analyzing a substance to be detected contained in a body fluid such as a blood glucose level, and more particularly to a body fluid analyzer capable of automatically and continuously performing a series of steps. Related to the device.

[0002]

2. Description of the Related Art Conventionally, when measuring a blood sugar level or the like, a finger, upper arm, abdomen, buttocks, etc. are scratched using a puncture device (lancet), blood droplets are squeezed out therefrom, and taken out from a packaging material. This is done by attaching the blood drop to the electrode attached to the sensor.

[0003] However, it is very troublesome to squeeze the amount of blood drop required for measurement by itself, and if the puncture device and the sensor are separated, the operation required by the measurer in performing a series of steps is performed. However, there is a problem that the measurement is complicated.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a convenient body fluid analyzer capable of automatically and continuously performing a series of steps required for measurement.

[0005]

In view of the above problems, as a result of intensive studies, the present inventors have found that a puncture means using a linear motion type or rotary type solenoid, and a compression band for discharging bodily fluid from a punctured finger. Cuff) and its pressurizing means, means for converting information about the discharged body fluid into an electric signal, means for determining a measured value based on the electric signal, a display for displaying the determined measured value, etc., in one device. By controlling with a computer, it was found that a series of steps required for the measurement can be performed automatically and continuously, and the analysis of the body fluid can be performed simply and quickly, and the present invention has been completed.

That is, the present invention provides a puncturing means for puncturing a finger, a compression band for compressing the finger, a pressurizing means for supplying air to the compression band, and an exhaust for exhausting air from the compression band. Means, a means for converting information relating to the bodily fluid discharged from the finger into an electric signal, a means for determining a measured value based on the electric signal, and a display for displaying the determined measured value. A bodily fluid analyzer, wherein the puncturing means has a puncturing blade or puncturing needle which can be moved forward and backward, and a linear motion type solenoid installed on an extension of a moving direction of the puncturing blade or puncturing needle. It is.

Further, the present invention provides a puncturing means for puncturing a finger, a compression band for compressing the finger, a pressurizing means for supplying air to the compression band, and an exhaust for exhausting air from the compression band. Means, a means for converting information relating to the bodily fluid discharged from the finger into an electric signal, a means for determining a measured value based on the electric signal, and a display for displaying the determined measured value. Wherein the puncturing means has a puncture blade or puncture needle that can be moved forward and backward, a rocker arm, and a linear motion type solenoid that can drive the puncture blade or puncture needle via the rocker arm. It is a body fluid analyzer.

Further, the present invention provides a puncturing means for puncturing a finger, a compression band for compressing the finger, a pressurizing means for supplying air to the compression band, and an exhaust for exhausting air from the compression band. Means, a means for converting information relating to the bodily fluid discharged from the finger into an electric signal, a means for determining a measured value based on the electric signal, and a display for displaying the determined measured value. Wherein the puncture means has a puncture blade or a puncture needle that can be moved forward and backward, a cam, and a rotary solenoid that can drive the puncture blade or the puncture needle via the cam. It is a body fluid analyzer.

[0009]

Puncturing means for puncturing a finger using a solenoid, a cuff for pressing the finger, pressurizing means for supplying air to the cuff, exhaust means for exhausting air from the cuff, According to the body fluid analyzer of the present invention having means for converting information about the body fluid discharged from the apparatus into an electric signal, means for determining a measured value by the electric signal, and a display for displaying the determined measured value, After the finger is punctured by the electrical control, the finger is pressed by the pressurized cuff to drain the body fluid, and after the drainage, the cuff is loosened by the exhaust and the finger is opened, and necessary information is obtained from the obtained body fluid. Can be converted into an electric signal to determine the measured value and display it on the display, so that a series of steps required for measurement can be performed automatically and continuously with high reliability, and the analysis of bodily fluids can be simplified. And can be done quickly.

In particular, by driving the puncture blade or the puncture needle with a linear motion type solenoid via a rocker arm or a rotary type solenoid via a cam, the body fluid analyzer can be made smaller and more portable. It can be excellent. In addition, by providing a spring that can pull out the puncture blade or the puncture needle pierced into the skin, the puncture time (time during which the puncture blade or the puncture needle pierces the skin) can be extremely short, and the pain of the measurer can be reduced. Can be reduced.

By adding a pressure sensor for detecting the pressure of the cuff to the above-mentioned body fluid analyzer, the upper limit of the pressure of the cuff can be determined regardless of the thickness of the finger of the measurer. An appropriate amount of bodily fluid can be squeezed out of the finger without giving a feeling.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. Here, the body fluid in the present invention refers to a liquid that can be discharged from a living body by puncturing, such as blood or intercellular exudate. FIG. 1 is a perspective view of a body fluid analyzer according to an example of the present invention. The body fluid analyzer 1 has a rectangular parallelepiped casing 11, and the casing 11 is provided with a tightening unit 2, a puncturing unit 3, a display 4, a main switch 51, and a puncturing switch 52. . The tightening portion 2 is formed in a cylindrical shape so that a finger can be inserted therein, and a cuff (compression band) 21 for pressing the finger is provided inside the tightening portion 2. The cuff 21 can press and release a finger using the injection and exhaust of air by a cuff drive device (not shown). The cuff drive has a sensor (pressure sensor) for detecting the pressure of the cuff 21, a solenoid valve, a pump, and a leak valve, and these are communicated with the cuff 21 through a rubber tube. The cuff driving device is controlled by a computer (not shown) provided inside the body fluid analyzer 1.

The puncture section 3 has a sleeve 6 and a plate-like base 7 housed in the sleeve 6 as shown in FIG. A puncture blade 71 is provided on one side of the base 7 so as to be able to move forward and backward (see FIGS. 3A and 3B), and an electrode tip 72 is provided on the other side. The electrode leads 73a, 73 are connected to the terminals of the electrode chip 72.
b (see FIG. 3 (c)). FIG. 3D is a perspective view of the base 7 and the puncture blade 71 as viewed from the rear.

The puncture blade 71 is provided in consideration of hygiene safety.
It is preferable to use one made of stainless steel,
Commercially available, such as Blo from Feather Safety Razor
od Lancets can be used. In addition, although the puncture blade is used in the present embodiment, the present invention is not limited to this, and may be anything as long as it can damage the skin and allow bodily fluids to be discharged. For example, it may be needle-shaped (puncture needle).

One of the electrodes of the electrode tip 72 is coated with an enzyme ink (not shown). Various types of enzyme inks can be selected according to the substance to be detected in the body fluid. For example, when measuring a blood glucose level, an ink composition containing glucose oxidase or the like can be used. If the sleeve 6 accommodating the base 7 having the puncture blade 71 and the electrode tip 72 is made into a cartridge type detachable from the body fluid analyzer 1, they can be disposable, which is very advantageous in terms of hygiene. .

The solenoid 9 in this embodiment is of a linear motion type, and is driven by turning on a puncture switch 52. FIG. 4A shows the solenoid 9 as viewed from the side. A plunger 91 that operates by the magnetic action of the coil passes through the center of the solenoid 9.
It is connected to. Solenoid 9 is a solenoid holder
93, this solenoid holder 93
A push spring 92 is provided between the armature 8 and the plunger 91 so that the arm member 8 passes therethrough.

The driving of the solenoid 9 causes the puncture blade 71
Moves forward through the arm member 8. The forward end of the puncturing blade 71 protrudes from the base 7 and reaches a position ahead of the electrode tip 72. The amount of protrusion of the puncture blade 71 from the electrode tip 72 can be set such that the finger can be punctured and drained while the finger is mounted on the body fluid analyzer 1, and the discharged body fluid contacts the electrode tip 72. What is necessary is to set so that it may be obtained.

The protruding puncture blade 71 is retracted by the pushing spring 92 pushing the plunger 91 back. By providing the pressing spring 92 as in the present embodiment, the puncture blade 71 pierced into the skin can be quickly pulled out, and the pain of the measurer can be reduced.

In the present invention, as shown in FIG.
A tension spring 94 may be provided at the rear end of the plunger 91 instead of the pressing spring 92. By providing such a tension spring 94, the protruding puncture blade 71 can be returned to the initial position. In this embodiment, the rear end of the tension spring 94 is connected to the casing 11.
However, it may be fixed inside the solenoid holder 93.

If the magnitude of the elastic force of the tension spring 94 is sufficient to return the plunger 91 to the initial position, but not enough to pull out the puncture blade 71 piercing the skin, FIG. As described above, the leaf springs 74 may be provided on both front sides of the base 7. By providing such a leaf spring 74, the puncture blade 71 pierced into the skin can be pulled out in a short time, and the pain of the measurer can be reduced. Also,
The amount of protrusion of the puncture blade 71 from the electrode tip 72 is
It can be adjusted by changing the thickness and hardness of the sheet.

In the present invention, as shown in FIG. 4C, the pressing spring 92 and the tension spring 94 may be used in combination. By using both springs in this manner, the neutral position of the plunger 91 (and, consequently, the puncture blade 71) can be maintained, and the puncture blade 71 pierced into the skin can be quickly pulled out.

FIG. 6 is a perspective view of a body fluid analyzer according to another embodiment of the present invention. This body fluid analyzer 1 '
Has almost the same configuration as the body fluid analyzer 1 in
The means for driving the puncture blade 71 'is different. The direction of movement of the solenoid 9' is changed by the rocker arm 81 to drive the puncture blade 71 '.

FIG. 7 (a) shows the puncture blade driving means in the main body liquid analyzer 1 '. In the main body liquid analyzer 1 ', the rocker arm 81 is provided so as to be swingable about a shaft 82 as a fulcrum.
A push rod 95 is connected to the plunger 91 ′ of the solenoid 9 ′, and the solenoid 9 ′ is installed so that the tip of the push rod 95 contacts the rocker arm 81. An arm member 8 'is provided at the end of the rocker arm 81 on the side opposite to the side on which the solenoid 9' is provided (with the shaft 82 therebetween). The tip of the arm member 8 'holds the puncture blade 71'. In this embodiment, a tension spring 94 'is provided at the end of the rocker arm 81 on the solenoid 9' side, and pulls the rocker arm 81 toward the solenoid 9 '.

By changing the direction of the linear motion of the solenoid using the rocker arm as in this embodiment,
The components can be arranged compactly, and the body fluid analyzer can be downsized.

In the puncture blade driving means of the main body liquid analyzer 1 ', the push rod 95 is protruded by driving the solenoid 9' and strikes the rocker arm 81. The impacted rocker arm 81 performs a swinging movement about the shaft 82, and causes the puncture blade 71 'to protrude via the arm member 8'. The rocker arm 81 that has swung and the puncturing blade 71 ′ that has protruded are returned to their initial positions by the action of the tension spring 94 ′.

Although the magnitude of the elastic force of the tension spring 94 'is sufficient to return the rocker arm 81 and the puncturing blade 71' to the initial position, it is necessary to pull out the puncturing blade 71 'piercing the skin. If not enough, leaf springs 74 may be provided on both front sides of the base 7 as shown in FIG.

In the present invention, as shown in FIG.
A push spring 92 'may be provided beside the arm member 8' so as to push the rocker arm 81. The pressing spring 92 ′ can return the rocker arm 81 that has swung to the initial position, and accordingly, the protruding puncturing blade 71 ′ can be retracted. By providing the pressing spring 92 'in this manner, the puncturing blade 71' piercing the skin can be quickly pulled out, and the pain of the measurer can be reduced.

In the present invention, as shown in FIG. 7C, the tension spring 94 'and the pressing spring 92' may be used in combination. By using both springs in this way, the neutral position of the rocker arm 81 (and thus the puncture blade 71) can be maintained, and the puncture blade 71 'pierced into the skin can be quickly pulled out.

FIG. 8 is a perspective view of a body fluid analyzer according to another embodiment of the present invention. This body fluid analyzer 1 ″ has substantially the same configuration as the body fluid analyzer 1 in FIG.
The means for driving 71 is different, and the rotary movement of the rotary type solenoid 9 ″ is changed to the linear movement of the arm member 8 ″ via the cam 96, thereby driving the puncture blade 71 ″.

FIG. 9A shows the puncture blade driving means in the main body liquid analyzer 1 ''. The solenoid 9 '' used in the main body liquid analyzer 1 '' is of a rotary type and performs a rotary motion. A cam 96 is attached to the rotating shaft 97 of the solenoid 9 ''. The cam 96 may have any shape as long as the puncturing blade 71 ″ can be protruded, and preferably has such a shape that the protruding puncturing blade 71 ″ can be retracted. In this embodiment, the cam 96 has a stepped portion.
960 is used, and the lower part (L) of the step part 960 has the smallest cam radius,
The upper portion (U) of the step 960 has the largest cam radius.

The rear end of the arm member 8 '' holding the puncture blade 71 '' is connected to a push spring 92 ''. A rod 83 extends vertically from a side of the arm member 8 ″, and the cam 96 comes into contact with the rod 83.

In this embodiment, a rotary type solenoid is used. However, the rotary type solenoid has an actual volume smaller than that of a linear motion type solenoid, which is advantageous for manufacturing a smaller body fluid analyzer. .

In the puncture blade driving means in the main body liquid analyzer 1 '', the cam 96 is rotated by driving the solenoid 9 ''. In the present embodiment, the cam 96 rotates clockwise. With this rotation, the radius of the cam 96 in the direction of the rod 83 gradually increases, and the cam 96 presses the rod 83. The rod 83 moves the arm member 8 ″ rearward by the pressing thereof, and compresses the spring 92 ″. Here, the step 960 of the cam 96
When the rod comes to the rod 83 side, the rod 83 is suddenly released from the pressed state, and moves in parallel to the cam 96 side by the elastic force of the spring 92 ''. Accordingly, the arm member 8 ″ and the puncturing blade 71 ″ protrude forward to perform puncturing.

The piercing blade 71 "pierced into the skin can be pulled out of the skin by the recoil of the spring 92", but if the force is small, as shown in FIG. A leaf spring 74 may be provided. When the cam 96 makes one rotation and returns to the initial position, the puncture blade 71 '', the arm member 8 '' and the rod
83 is also returned to the initial position by the action of the pressing spring 92 ''. In the above embodiment, the push spring 92 '' is provided so that the rod 83 follows the movement of the cam 96. However, the present invention is not limited to the push spring only, and as shown in FIG. Push spring 9
Tension spring 9 that pulls rod 83 to the cam side instead of 2 ''
4 '' may be provided, or both a push spring 92 '' and a tension spring 94 '' may be provided as shown in FIG. 9 (c).

FIG. 10 is a block diagram showing an example of a circuit configuration of the body fluid analyzer 1. Since the body fluid analyzers 1 ′ and 1 ″ have the same circuit configuration, the body fluid analyzer 1 will be described as an example.

In the body fluid analyzer 1, the cuff 21 is connected to the pressure sensor, the solenoid valve, the pump, and the leak valve by a rubber tube, and these constitute an air pressure system. The operation of each member in the body fluid analyzer is controlled by a computer. The computer has a function to turn on / off a solenoid valve, a leak valve and a pump, a function to capture air pressure data detected by a pressure sensor, a function to operate a solenoid, a function to capture an electric signal from an electrode, and a function to calculate an electric signal. It has a function of determining a measured value and a function of outputting the measured value to a display.

This computer is initialized when the main switch 51 is turned on, drives the solenoid 9 when the puncture switch 52 is turned on, and is programmed to drive the pump after a predetermined time. In addition, the pump may be turned off and the solenoid valve and the leak valve may be opened by taking in information that the pressure of the cuff 21 or the body fluid that has been detected by the pressure sensor has come into contact with the electrode, or after a predetermined time has elapsed since the pump was turned on. Command. Electric signals from the electrodes are also taken into the computer, and the measured values determined by the computer are output to the display 4. Note that this circuit configuration is merely an example, and a pressure sensor may not be necessary in some cases.

An example of the detailed operation of the body fluid analyzer 1 will be described with reference to the flowchart shown in FIG. Since the body fluid analyzers 1 ′ and 1 ″ perform the same operation, the description will be made by taking the body fluid analyzer 1 as an example. Before starting the measurement, the measurer inserts his finger into the cuff. The finger may be any finger and may be a finger on either the left or right hand. When the main switch 51 is turned on, the system is initialized, such as clearing the memories in the computer.

Next, the measurer turns on the puncture switch 52.
When the puncture switch is turned on, the solenoid 9 is driven, and the puncture blade protrudes from the base (step 1). The protruding puncture blade returns to its original position by the action of a spring after hurting the skin of the fingertip. After the puncture blade is projected, the pump is driven (step 2), and the cuff 21 is pressurized. This cuff 21 presses on a finger and squeezes body fluid from the damaged skin.

There are three methods for determining whether to turn off the pump. First, for example, when the apparent blood pressure reaches a predetermined value (P) due to the pressure of the cuff,
The determination is YES (FIG. 11: step 3). Note that the apparent blood pressure refers to a transient blood pressure value displayed from the pressure sensor in the process of pressing the finger with the cuff. That is, an apparent blood pressure that directly reflects the cuff pressure can be detected by the pressure sensor. The value of P is preferably 120 mmHg or more, and about 180 mmHg can obtain the most appropriate amount of liquid. According to the first method, the upper limit of the cuff pressure can be determined regardless of the thickness of the measurer's finger, and the body fluid can be squeezed out without giving the measurer an excessive feeling of pressure.

Second, when a predetermined time (T) has elapsed since the pump was turned on, the determination is YES (FIG. 12: step 3 '). The value of T is desirably about 5 to 60 seconds.
The best amount of liquid can be obtained at about 0 seconds.

Third, when the squeezed body fluid comes into contact with the electrode, the determination is YES (FIG. 13: step 3 "). According to the third method, a necessary and sufficient amount of body fluid can be secured. In addition, when the second method and the third method are applied in this step, the pressure sensor is not required.

When the operation of the pump is stopped according to any of the first to third methods (FIG. 11: step 4), the solenoid valve and the leak valve are opened immediately, and the air in the cuff is quickly exhausted. (Step 5). Although only one valve may be used, by using the electromagnetic valve and the leak valve together, the air in the cuff can be quickly exhausted, and the finger of the measurer can be released from the compressed state.

The squeezed body fluid comes into contact with the electrodes of the electrode tip 72, and information on the body fluid is sent to the computer as an electric signal, and the calculation is started (step 6).
When the time t has elapsed from the start of the calculation (step 7), the calculation is terminated (step 8). Since a certain time is required for the measured value to stabilize, the value of t greatly depends on the performance of the electrode, but generally requires about 5 to 60 seconds. When the measured value is determined by the calculation by the computer, the measured value is displayed on the display 4 (step 9).

According to the body fluid analyzer of the present invention described above, a series of operation steps can be reduced, and the inspection can be completed very easily. In addition, since this device is provided with all of the puncturing means, the pressurizing means, the means for converting information on the body fluid into an electric signal, the means for determining the measured value, and the display for displaying the measured value, the general user is skilled. Without the need for
Can be used easily and quickly. Further, in the body fluid analyzer of the present invention, by changing the type of the enzyme ink used, not only the blood sugar level but also various substances in the body fluid can be analyzed.

Although the present invention has been described in detail with reference to the drawings, the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the present invention.
For example, by making the display part rotatable with respect to the apparatus main body, the display can be oriented in a desired direction, and measurement can be easily performed. Further, the present invention is not limited to a finger, and may be applied to a device for a wrist, an arm, or the like. Furthermore, it is also possible to provide a voice guide for the blind, and to change to a series of systems until the measurement result is heard with a single switch.

[0047]

According to the apparatus of the present invention, a series of steps required for measurement can be performed automatically and continuously with high reliability, and the analysis of bodily fluids can be performed simply and quickly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a body fluid analyzer of the present invention.

FIG. 2 is a perspective view showing a puncturing means in the body fluid analyzer of FIG. 1;

FIG. 3 is a view showing a base, a puncture blade, and an electrode tip in the body fluid analyzer of the present invention. (a) is a view seen from the puncture blade side, (b) is a view showing a state where the puncture blade is protruding, (c) is a view seen from the electrode tip installation side, and (d) is a rear view. FIG.

4 is a side view showing examples (a) to (c) of puncturing blade driving means in the body fluid analyzer of FIG. 1;

FIG. 5 is a perspective view showing another example of the base in FIG. 2;

FIG. 6 is a perspective view showing another example of the body fluid analyzer of the present invention.

7 is a plan view showing examples (a) to (c) of puncturing blade driving means in the body fluid analyzer of FIG. 6;

FIG. 8 is a perspective view showing another example of the body fluid analyzer of the present invention.

9 is a plan view showing examples (a) to (c) of puncturing blade driving means in the body fluid analyzer of FIG. 8;

FIG. 10 is a block diagram showing an example of a circuit configuration of the body fluid analyzer of the present invention.

FIG. 11 is a flowchart showing an example of the operation of the body fluid analyzer of the present invention.

FIG. 12 is a diagram showing another example of step 3 in the flowchart of FIG. 11;

FIG. 13 is a diagram showing another example of step 3 in the flowchart of FIG. 11;

[Explanation of symbols]

 1, 1 ', 1' '... body fluid analyzer 11, 11', 11 '' ... casing 2, 2 ', 2' '... tightening part 21, 21', 21 '' ... cuff 3, 3 ', 3' '... Puncture part 4,4', 4 '' ... Display 51,51 ', 51 "... Main switch 52,52', 52" ... Puncture switch 6 ... Sleeve 7,7 ', 7 "... Base 71,71 ', 71' '... puncture blade 72 ... electrode tip 73a, 73b ... electrode lead 74 ... leaf spring 8,8', 8 '' ... arm member 81 ... rocker arm 82 ... shaft 83 ... rod 9,9 ' ... Solenoid (linear motion type) 9 "... solenoid (rotary type) 91,91 '... plunger 92,92', 92" ... Press spring 93 ... Solenoid holder 94,94 ', 94 "... Tension spring 95 ... Push rod 96 ... Cam 960 ... Step 97 ... Rotating shaft

Claims (6)

[Claims] 1. A puncturing means for puncturing a finger, a compression band for compressing the finger, a pressure means for supplying air to the compression band, an exhaust means for exhausting air from the compression band, and a finger. A body fluid analyzer having means for converting information relating to bodily fluid discharged from the apparatus into an electrical signal, means for determining a measured value based on the electrical signal, and a display for displaying the determined measured value, wherein the puncture means A puncture blade or a puncture needle that can be moved forward and backward, and a linear motion solenoid installed on an extension of the direction of movement of the puncture blade or the puncture needle. 2. A puncturing means for puncturing a finger, a compression band for compressing the finger, a pressure means for supplying air to the compression band, an exhaust means for exhausting air from the compression band, and a finger. A body fluid analyzer having means for converting information relating to bodily fluid discharged from the apparatus into an electrical signal, means for determining a measured value based on the electrical signal, and a display for displaying the determined measured value, wherein the puncture means A puncture blade or a puncture needle that can be moved forward and backward, a rocker arm, and a linear motion type solenoid that can drive the puncture blade or the puncture needle via the rocker arm; Analysis equipment. 3. A puncturing means for puncturing a finger, a compression band for compressing the finger, a pressure means for supplying air to the compression band, an exhaust means for exhausting air from the compression band, and a finger. A body fluid analyzer having means for converting information relating to bodily fluid discharged from the apparatus into an electrical signal, means for determining a measured value based on the electrical signal, and a display for displaying the determined measured value, wherein the puncture means A body fluid analyzer comprising: a puncture blade or a puncture needle that can be moved forward and backward; a cam; and a rotary solenoid that can drive the puncture blade or the puncture needle via the cam. 4. The body fluid analyzer according to claim 1, further comprising a spring capable of pulling out the puncture blade or the puncture needle pierced into the skin. 5. The body fluid analyzer according to claim 1, further comprising a spring capable of returning the driven puncture blade or the puncture needle to an initial position. 6. The body fluid analyzer according to claim 1, further comprising a pressure sensor for detecting a pressure of the compression band.