JP3000395U - Stick type analyzer - Google Patents

Abstract

(57) [Abstract] [Purpose] By carefully devising a protective structure for the sensor part, it is possible to reliably protect the sensor part and prevent its dryness, while eliminating the need for a separate cap that was required in the past. It is possible to provide a stick-type analyzer that can perform not only indoor measurements but also outdoor measurements. In a stick type analyzer having a sensor section 8 at the tip of a main body section 1, a cover body 13 for covering the sensor section 8 is provided above the sensor section 8 so as to be openable and closable with respect to a measurement site.
The sample introduction opening 21 is opened in the cover body 13, and the sample introduction opening 21 is opened and closed by the lid body 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stick-type analyzer for measuring ion concentration such as pH and conductivity of a sample such as liquid or gel.

[0002]

[Prior art]

 Recently, as an analyzer for liquids, gels, etc., a stick-type analyzer for measuring ion concentration such as pH and conductivity has been developed, filed, and put on the market.

An example of the stick-type analyzer is disclosed in Japanese Utility Model Publication No. 3-128847. FIG. 11 is an exploded perspective view showing an example of a stick-type pH meter according to this publication. In this figure, reference numeral 1 is a main body made of plastic such as ABS resin, in which an arithmetic processing unit such as a microcomputer ( (Not shown), and a display section 2 for displaying the measurement results and the like on the upper surface, and an operation section 3 having operation switches such as a power switch 3A and a hold switch 3B. An operation unit 4 is provided, and a power supply unit 5 including button batteries 5A and 5B is formed adjacent to the display / operation unit 4.

Reference numeral 6 denotes an electrode portion formed in a waterproof structure. One end side is connected to the other end side of the tubular portion 7 made of plastic and opened so that the power source portion 5 can be accommodated. The sensor unit 8 is attached to the main body unit 1 so as to cover the power source unit 5 and integrally connected to the main body unit 1, or can be separated from the main body unit 1. Although the detailed description of the configuration of the sensor unit 8 is omitted, the sensor unit body 9 made of a plastic such as ABS resin has a recess 10 so that the sample to be measured (liquid or gel-like body) does not spill. At the same time as the formation, a flat pH composite electrode 11 is formed on the bottom of the recess 10. Reference numeral 12 is a protective cap made of plastic such as ABS resin, which is detachably attached to the sensor portion 8 in order to protect it.

That is, the pH meter is provided with the sensor portion 8 at the tip of the main body portion 1, and is formed in a stick shape having a length of, for example, about 10 cm.

In the stick-type pH meter, when the measurement is not performed, the cap 12 is provided on the sensor section 8 provided at the tip of the main body section 1, so that the sensor section 8 can be protected from other elements. It is prevented that an object or a foreign matter is damaged by hitting it, and at the same time, a main component constituting the sensor unit 8 such as a gel-like member constituting the pH composite electrode 11 is prevented from being dried. In addition, at the time of measurement, the pH value displayed on the display unit 2 can be read directly by removing the cap 12 and directly immersing the sensor unit 8 in the test liquid and pressing the power switch 3A, which is very useful outdoors. The pH of the test liquid can be easily measured.

[0007]

[Problems to be solved by the device]

 However, the conventional stick-type pH meter described above has a problem that it is difficult to surely immerse the sensor unit 8 in the test liquid when the test liquid is contained in the narrow-mouthed container. Therefore, in such a case, in the conventional case, the pH of the test solution is dropped by dropping the test solution collected by a spoid or the like into the recess 10 of the sensor section 8 with the main body 1 placed horizontally. However, there were problems such as the need to carry equipment such as spoids, and the difficulty of cleaning the spoids after each measurement, which made it impossible to measure pH easily in the field.

If the shape of the container containing the test liquid is not clear, the pH composite electrode 11 collides with the wall inside the container when the sensor unit 8 is inserted into the container. There was also a risk that it would be damaged.

Furthermore, in the stick-type pH meter, the cap 12 for protecting the sensor portion 8 and preventing its dryness is a separate structure from the main body portion 1. There were handling and management problems such as easy loss.

The present invention has been made in consideration of the above-mentioned matters. By elaborating the work on the protective structure of the sensor unit, the sensor having a separate structure which has been conventionally required is not required. It is an object of the present invention to provide a stick-type analyzer that can reliably protect a part and prevent it from drying, and can easily perform not only indoor measurements but also outdoor measurements.

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a stick-type analyzer having a sensor part at the tip of a main body part, and a cover body for covering the sensor part is provided above the sensor part so as to be openable and closable with respect to a measurement site The sample introduction opening is opened in the cover body, and the sample introduction opening is opened and closed by the lid body.

In this case, the cover body may be detachably attached to the sensor unit.

The sample introducing opening may be opened and closed by sliding the lid body linearly or in an arc shape, but the lid body is attached to the cover body via a hinge portion. Good.

It is also convenient to fit the cover body in a watertight manner with the tip peripheral wall of the sensor section.

Further, it is convenient that either or both of the cover body and the lid body are made of a flexible material.

[0016]

[Action]

 In the stick-type analyzer of the present invention, a cover that covers the sensor is provided above the sensor so as to be openable and closable with respect to the measurement site, and a sample introduction opening is opened in this cover and the sample introduction opening is provided. Since it is configured to open and close by the lid, keep the sample introduction opening closed by the lid to prevent other objects or foreign matter from hitting the sensor during non-measurement. This is prevented from being damaged and the sensor part is prevented from being dried.

In addition, at the time of measurement, the sample introduction opening is opened by sliding or rotating the lid, and in that state, the sensor unit is directly immersed in the test liquid and the power switch is pressed. The measured value displayed on the display can be directly read, and it is very easy to measure the ion concentration of the test liquid even in the field.

As described above, in the above-mentioned stick-type analyzer, the sensor section is brought into a measurement state or a non-measurement state, respectively, just by opening and closing the lid provided on the cover body covering the sensor section. Unlike the conventional stick-type analyzer of this type described above, it is possible to protect the sensor part and prevent it from drying without providing a cap that is separate from the body part. Of course, not only indoor measurements but also outdoor measurements can be performed easily.

Particularly, when the cover body is detachably attached to the sensor portion, the replacement and cleaning can be easily performed.

When the lid is slidable so as to match the longitudinal direction of the main body, the lid does not project more than the width of the sensor or the main body, which makes the lid compact and opens and closes. Easy to operate.

When the cover body is fitted in a watertight manner with the tip peripheral wall of the sensor part, the sample scooped up by the sensor part can be collected without leaking.

[0022]

【Example】

 1 to 6 show an embodiment of the present invention, and particularly show an example in which the present invention is applied to a pH meter. In the following description, the same parts as those shown in FIG. 11 indicate the same or corresponding parts.

First, FIGS. 1 to 5 show the construction of the pH meter. In these figures, 13 is detachably attached to the upper part of the sensor unit body 9 so as to cover the sensor unit 8 and to measure it. A cover body made of a flexible material such as polyethylene resin, which is provided so as to be openable and closable with respect to the portion, is provided on one side of the flat portion 14 of the cover body 13 as shown in FIGS. As shown, support shafts 15 are formed on both the left and right sides, and the support shafts 15 are pivotally and detachably attached by elastically engaging the support shafts 15 in the mounting holes 16 provided in the sensor body 9. Attached to.

As shown in FIG. 3, both side portions from the portion of the cover body 13 where the support shaft portion 15 is formed (hereinafter referred to as the base end side) to the side facing the base end side (hereinafter referred to as the tip end side). In addition, it is formed so as to become slightly narrower toward the base end side, and the side part on the base end side is formed in a shape conforming to the rounded tip shape of the sensor body 9 and excluding the base end side. The other side portion 17 is slightly bent downward. As shown in FIGS. 3 and 4, on the inner surface of the bent portion 17 centering on the front end side, a ridge portion 19 that fits into a groove 18 formed outside the front surface of the sensor portion body 9. Are formed. Reference numeral 20 denotes an opening / closing operation projection provided on the tip side of the cover body 13.

As shown in FIG. 2B and FIG. 3, the sample introduction opening 21 is formed so that the tip side is convex, and the sample introduction opening 21 is continuous with the flat portion 14 of the cover body 13 substantially in the center thereof. Thus, a narrow opening 22 extending toward the hinge is formed. Further, the flat surface 14A on the tip side of the sample introduction opening 21 of the cover body 13 is slightly curved so as to be convex upward.

1 to 3 and 5, reference numeral 23 denotes a lid body that opens and closes the sample introduction opening 21 by linearly sliding in the longitudinal direction of the main body 1 along the opening 22 of the cover body 13. , A flexible material such as polyethylene resin. One end side of the lid body 23 is formed in a convex shape in conformity with the shape of the tip end side of the sample introduction opening 21, and the flat surface 23A on the one end side is upwardly aligned with the flat surface on the tip end side of the cover body 13. It is slightly curved so as to be convex, and the flat surface 23 B on the other end side is formed flat so as to match the flat surface on the proximal end side of the cover body 13 so that the sample introduction opening 21 can be closed without a gap. Has been done.

On the back surface of the lid body 23, L-shaped and inverted L-shaped engagement projections 24 A and 24 B that are inserted into the opening 22 of the cover body 13 and are in sliding contact with the back surface around the opening 22. Is provided. Further, reference numeral 25 is an opening / closing operation projection.

Next, the operation of the stick-type pH meter having the above structure will be described with reference to FIG. First, the cover body 13 is pivotally supported on the upper part of the sensor part body 9 and attached so as to cover the sensor part 8, and the ridges 19 are fitted into the grooves 18 formed on the outside of the front surface of the sensor part body 9. To combine.

When the stick-type pH meter is not used for the measurement, as shown in FIG. 2A, in the cover body 13 provided on the upper part of the sensor section 8, the lid body 23 is attached to the main body section 1. The sample introduction opening 21 of the cover body 13 is closed by pushing and sliding the cover body 13 toward the tip side (direction of arrow B in the figure) of the cover body 13 along the longitudinal direction. This closed state is maintained by the engagement protrusions 24A and 24B of the cover body 13 making light contact with the back surface around the opening 22. When the sample introduction opening 21 is closed, it is possible to prevent the sensor section 8 from being damaged by another object or foreign matter hitting the sensor section 8 and to prevent the sensor section 8 from drying.

Then, at the time of measurement, as shown in FIG. 2B, the lid body 23 is arranged along the longitudinal direction of the main body 1 so that the base end side of the cover body 13 (direction of arrow A in the figure). Then, the sample introduction opening 21 is opened. This closed state is maintained by the engaging projections 24A and 24B of the cover body 13 making light contact with the back surface around the opening 22.

With the sample introduction opening 21 opened, as shown in FIG. 6, the sensor unit 8 is inserted into the container 27 containing the liquid sample 26 as the subject through the mouth 27A, and the pH is adjusted. When the entire instrument is vertically moved up and down and then withdrawn, a part of the liquid sample 26 is collected in the liquid reservoir 28 formed by the cover body 13 and the recess 10. Therefore, even when the container 27 is arranged in a narrow place and the immersion measurement cannot be performed, the liquid sample 26 can be collected by the liquid reservoir 28.

When the liquid sample 26 is collected, the cover body 13 projects so as to protect the electrode 11, and the electrode 11 is provided at the bottom of the recess 10. It does not collide with the inner wall 27B or other objects and are damaged.

After collecting the liquid sample 26 as described above, the sensor unit 8 is pulled out from the container 27, and is horizontally placed by hand so that the sensor unit 8 comes into contact with the electrode 11 provided at the bottom of the recess 10. By pressing the power switch 3A while checking this state, the pH value of the liquid sample 26 is displayed on the display unit 2, and the pH of the liquid sample 26 can be easily measured.

After the above measurement is completed, the cover 20 is opened by lightly pushing the protrusion 20 upward, the liquid sample 26 in the liquid reservoir 28 is discarded, and the cotton swab 29 soaked with the cleaning liquid is used. The electrodes 11 and the like may be cleaned. In this case, since the cover body 13 is attached to the sensor body 9 by the support shaft portion 15, it is not necessary to remove the cover body 13 from the body portion 1, and the cover body 13 is not lost.

As described above, in the stick-type pH meter of the above-described embodiment, the sensor unit 8 can be measured or opened by simply opening and closing the lid member 23 of the cover member 13 provided so as to cover the sensor unit 8. It can be set to a state suitable for each non-measurement state, and unlike the conventional pH meter shown in FIG. 11, even if a cap separate from the main body 1 is not provided, the sensor 8 can be protected and dried. Not only can measurements be taken reliably indoors, but measurements outdoors can be performed easily.

In the stick-type pH meter of the above-mentioned embodiment, the cover body 13 is detachably attached to the sensor portion 8. Therefore, the replacement, cleaning and removal of the adhering foreign matter can be easily performed. it can.

Since the ridge 19 of the cover body 13 and the groove 18 of the sensor body 9 are fitted to each other, even if the main body 1 and the sensor 8 are almost vertical as shown in FIG. Liquid leakage does not occur in the portion 28.

Further, in the stick-type pH meter of the above-mentioned embodiment, the sample introduction opening 21 is opened or closed simply by sliding the lid 23 along the longitudinal direction of the main body 1. Therefore, the lid 23 does not protrude beyond the width of the sensor unit 8 and the main body unit 1, and therefore, it is compact and the opening / closing operation is easy, and the mouth 27A of the container 27 shown in FIG. Even if the diameter is small, the sensor portion 8 can be inserted.

Further, since the cover body 13 and the lid body 23 are made of a flexible material such as polyethylene resin, they are easy to handle.

The present invention is not limited to the above-described embodiment, but can be modified in various ways, and the cover body 13 does not necessarily have to be detachable from the sensor unit 8. It suffices that the measurement part of the sensor part 8 can be opened and closed.

When the cover body 13 is detachably attached to the sensor portion 8, as shown in FIG. 7, the support shaft portion 30 is formed on the sensor portion body 9 and the base end side of the cover body 13 is You may form the attachment hole 31 corresponding to the support shaft part 30.

Instead of the lid 23, a lid as shown in FIG. 8 or 9 may be used. First, the configuration of FIG. 8 will be described. Reference numeral 32 denotes an arc-shaped sample introduction opening in which the cover body 13 is formed. Reference numeral 33 denotes a lid that appropriately opens and closes the sample introduction opening 32, has a substantially fan shape in plan view, and a rotating shaft 34 having a male screw portion (not shown) is erected at the center thereof. A contact portion 35 is provided so as to project on the upper surface thereof. Then, the rotary shaft 34 is inserted from the rear surface side of the cover body 13 into a hole (not shown) formed at the center of rotation of the arc-shaped sample introduction opening 32 described above to form a knurl on the front surface. The nut member 36 is screwed onto the male screw portion so that the lid 33 can be rotated about the rotary shaft 34 in both directions of the double arrow. According to this configuration, the sample introduction opening 32 can be opened and closed by operating the nut member 36 and sliding the lid 33 in the rotational direction (arc-shaped slide).

Explaining the configuration of FIG. 9, 37 is a rectangular sample introduction opening formed in the cover body 13, and 38 is a lid body formed in the same shape as the sample introduction opening 38. Then, it is provided on the opening side end portion of the flat surface 14A on the tip side of the sample introduction opening 37 via the hinge portion 39. Reference numeral 40 denotes an opening / closing knob portion. According to this configuration, the sample introduction opening 37 can be opened and closed by pinching the opening / closing knob 40 with a finger and moving the lid 38 up and down.

Further, FIG. 10 shows another embodiment of the fitting structure of the tip portion of the cover body 13 and the tip peripheral wall of the sensor portion body 9, and in this figure, the cover body 13 is bent. A groove 41 is provided on the back surface side of the portion 17, and a ridge portion 42 corresponding to the groove 41 is formed on the peripheral wall of the tip of the sensor body 9.

It is needless to say that the stick-type pH meter may hold the sensor in a horizontal state and supply the subject to the sensor section 8 with a spoid or the like to measure the pH.

Further, the present invention is not limited to the above pH meter, but can be applied to various stick type analyzers such as various ion concentration meters and conductivity meters. Further, the test object may be not only liquid but also gel.

[0047]

[Effect of device]

 As described above, according to the present invention, it is possible to reliably protect the sensor section and prevent it from drying, while eliminating the need for a separate cap, which was required in the past. Of course, it is possible to easily perform the measurement in the field.

In particular, since the cap having a separate structure is not necessary, there is no fear of loss of the cap, which has an advantage of eliminating management problems.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing an example of a stick-type analyzer of the present invention.

FIG. 2A is a plan view showing a state in which an opening of a cover body is closed in the stick-type analyzer, and FIG.
[Fig. 3] is a plan view of relevant parts showing a state where the opening is opened.

FIG. 3 is an exploded perspective view showing a configuration near a sensor unit of the stick-type analyzer.

FIG. 4 is a vertical sectional front view of the sensor unit.

FIG. 5 is an exploded perspective view showing an example of a mounted state of the cover body.

FIG. 6 is an operation explanatory view of the stick-type analyzer.

FIG. 7 is an exploded perspective view showing another example of a mounted state of the cover body.

FIG. 8 is a perspective view showing another embodiment of the lid body used in the present invention.

FIG. 9 is a perspective view showing still another embodiment of the lid body used in the present invention.

FIG. 10 is a vertical cross-sectional front view showing another mode of the fitted state of the cover body and the sensor body.

FIG. 11 is an exploded perspective view showing a conventional stick type analyzer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body part, 8 ... Sensor part, 13 ... Cover body 21,3
2, 37 ... Sample introduction opening, 23, 33, 38 ... Lid, 39 ... Hinge part.

Claims (9)

[Scope of utility model registration request] 1. A stick-type analyzer having a sensor section at the tip of a main body section, a cover body for covering the sensor section is provided above the sensor section so as to be openable and closable with respect to a measurement site, and a sample is introduced into the cover body. A stick-type analyzer characterized in that an opening is formed and the sample introduction opening is opened and closed by a lid. 2. The stick-type analyzer according to claim 1, wherein the sample introduction opening is opened and closed by linearly sliding the lid. 3. The stick-type analyzer according to claim 1, wherein the sample introduction opening is opened and closed by sliding the lid in an arc shape. 4. The stick type analyzer according to claim 1, wherein the lid body is attached to the cover body via a hinge portion. 5. The stick-type analyzer according to claim 1, wherein the cover body is fitted in a watertight manner with the peripheral wall of the tip of the sensor section. 6. The cover body is made of a flexible material.
5. The stick type analyzer according to any one of 1 to 5. 7. The stick type analyzer according to claim 1, wherein the lid is made of a flexible material. 8. The stick type analyzer according to claim 1, wherein the cover body is detachably attached to the sensor section. 9. A stick-type analyzer having a sensor section at the tip of a main body section, wherein a cover body made of a flexible material for covering the sensor section is provided above the sensor section and can be opened and closed through a hinge, and the sensor section is provided. It is provided so as to be fitted in a watertight manner with the peripheral wall of the tip of the, and an opening for sample introduction is opened in this cover body, and this sample introduction opening is made of a flexible material and is opened and closed by a slidable lid body. A stick-type analyzer characterized in that