JP4392554B2 - Scientific phenomenon evaluation device, science experiment teaching material, and manufacturing method thereof - Google Patents

Description

  The present invention relates to a scientific phenomenon evaluation device, a science experiment teaching material, and a manufacturing method thereof, and in particular, a scientific phenomenon evaluation device, a science experiment teaching material, which is inexpensive, has a low environmental burden, and is suitable for easily enjoying advanced technology, And a manufacturing method thereof.

  Various scientific phenomena evaluation devices and science experiment teaching materials have been proposed so far (see Patent Document 1).

  For example, Patent Document 1 is a science teaching material that allows natural phenomena due to temperature changes of water to be observed by cooling or freezing water vapor in water, water in a container, or water vapor, and is small and simple in structure. It is said that it is possible to faithfully reproduce various natural phenomena due to temperature changes in water.

In addition, as a chemical experiment equipment for education, experimental kits such as “Science and Learning Experiment Kit Series” and “Adult Science Global Environment Analysis Kit” have been released by Gakken. Such an experimental kit is sold at a relatively low price of about several hundred yen to 3,000 yen. It is an experimental kit that gives children dreams and gives users enjoyment of experiments. Expo.
JP 2000-242162 A

  However, as a conventional evaluation apparatus for this kind of scientific phenomenon, the one described in Patent Document 1 has a relatively complicated structure and is difficult to provide at low cost, and all students in the class purchase it. Is unsuitable.

  On the other hand, many experimental kits with a relatively simple structure are relatively inexpensive and suitable for all students in the class to purchase and use, but many are insufficient in terms of accuracy. If the amount of chemicals used is large and used by all students in the class, it is not desirable because, for example, waste liquid treatment is an environmental burden.

  Moreover, the experimental contents that can be experienced with the conventional experimental kit are classical scientific experimental methods, and those that can easily enjoy advanced technology are very limited. In particular, the latest technologies of microtechnology and nanotechnology have attracted attention recently, and there is a need for experimental teaching materials that allow easy observation of the diffusion phenomenon of substances occurring in microchannels, which are fine channels. However, what is necessary for a micro scientific experiment is a highly accurate micro flow path, and how to assemble such a micro flow path with high accuracy and at a low cost is important in conducting a scientific experiment.

  The present invention has been made in view of such circumstances, and provides a scientific phenomenon evaluation apparatus, a science experiment teaching material, and a manufacturing method thereof that are inexpensive, have a low environmental load, and are suitable for easily enjoying advanced technologies. For the purpose.

In order to achieve the above object, the present invention provides a substrate in which a long groove having a cross-sectional area of 1 mm ² or less is formed on the surface of a plate-like body, and is disposed in close contact with the surface of the substrate so as to cover the long groove. A cover plate that forms a fine flow path in the substrate, and a casing that sandwiches the substrate and the cover plate from both sides and supports the substrate and the cover plate, and the casing includes the substrate and A pair of transparent contact plates applied to both sides of the cover plate and the connecting plate for connecting the pair of contact plates so as to sandwich the substrate and the cover plate; The cover plate and the cover plate are brought into close contact with each other without using an adhesive, and the substrate and / or cover plate is made transparent so that a scientific phenomenon in the flow path can be visually recognized. To provide an evaluation device for scientific phenomena The

According to the present invention, since this evaluation apparatus has a fine flow path having a cross-sectional area of 1 mm ² or less, sufficient accuracy to experience advanced technology can be obtained. Advanced technologies such as liquid diffusion phenomenon, liquid heat transfer phenomenon, liquid mixing phenomenon, liquid chemical reaction (for example, acid-alkali reaction, hydrolysis reaction) Sufficient accuracy to experience is obtained, the amount of chemicals used is small, and the environmental load is small. Therefore, such a scientific phenomenon evaluation device is suitable as a science experiment teaching material.

  Moreover, since the substrate and the cover plate are sandwiched from both sides by the casing, the adhesion between the substrate and the cover plate is improved. As the casing, for example, a pair of transparent contact plates applied to both sides where the substrate and the cover plate are combined, and a connecting means for connecting the pair of contact plates so as to sandwich the substrate and the cover plate. Can be configured. Therefore, during the experiment, liquid leakage does not occur between the substrate and the cover plate, and damage to the cover plate can be prevented.

  Here, although it is a “liquid reservoir”, it is usually in a hollow shape, and chemicals and the like are supplied to this evaluation device when operating.

As the cross-sectional area of the fine flow path and a 1 mm ² or less, more preferably 0.0025~0.64mm ^2, 0.01~0.25mm ² being most preferred.

  In the present invention, the substrate and / or the cover plate is preferably transparent. Moreover, in this invention, it is preferable that the said board | substrate and / or a cover board consist of resin materials. If the substrate and / or the cover plate are transparent, a scientific phenomenon in the flow path can be visually recognized, and if the substrate and / or the cover plate is made of a resin material, the evaluation apparatus can be provided at a low cost.

Further, in the present invention, one end of the plurality of flow paths merges at one merge point, and the other end of the plurality of flow paths communicates with a liquid reservoir having a volume of 5 to 5000 mm ³ . Is preferred. As described above, one end of the plurality of flow paths merges at one merge point, and the other end of the flow paths communicates with the liquid reservoir, thereby allowing various experiments.

In the present invention, the first channel and the one end of the second channel, which are the two channels having substantially the same length, merge at one merge point, and the first channel The other end communicates with a first liquid reservoir having a volume of 5 to 5000 mm ³ , and the other end of the second flow path communicates with a second liquid reservoir having a volume of 5 to 5000 mm ³ . It is preferable that one end of the third flow path, which is the flow path, communicates with the confluence, and the other end of the third flow path communicates with a third liquid reservoir having a volume of 5 to 5000 mm ³ . .

  In this way, if the structure is composed of three flow paths and three liquid reservoirs, it is possible to check diffusion phenomena, etc. occurring in a micro channel by a simple method, and it is suitable for enjoying advanced technologies easily. It is.

  In the present invention, the cover plate is preferably formed with a through-hole through which one or more of the first liquid reservoir, the second liquid reservoir, and the third liquid reservoir can communicate with the outside air. . Thus, if the liquid reservoir and the outside air communicate with each other, the through hole can be used not only as an inlet for introducing liquid into the liquid reservoir or as an air vent, but also in each micro channel. The phenomenon can be easily controlled.

According to a sixth aspect of the present invention, there is provided a science experiment teaching material characterized in that, in order to achieve the object, the scientific phenomenon evaluation apparatus according to any one of the first to fifth aspects is a portable experimental apparatus. I will provide a.

This is because the evaluation device having the configuration according to any one of claims 1 to 5 is extremely effective as a science experiment teaching material.

In order to achieve the above object, a seventh aspect of the invention is a method for manufacturing a scientific phenomenon evaluation apparatus according to any one of the first to fifth aspects, or a method for manufacturing a science experiment teaching material according to the sixth aspect. Then, using a reversal mold plate having a reversal shape of a long groove formed on the substrate formed on the surface, a resin material is applied to the surface of the reversal mold plate, the resin material is cured, A substrate forming step of forming the substrate by peeling the resin material from the reversal mold plate, and a combination of forming a fine flow path in the substrate by covering a cover plate with the cover plate on the surface of the substrate. And a casing attaching step for attaching the casing to the combined substrate and cover plate and supporting the substrate and cover plate so as to sandwich the substrate and the cover plate. Review of scientific phenomena To provide a manufacturing method of the production method or science experiment teaching aid of the device.

  According to the present invention, in the substrate forming step, the substrate is formed by transfer molding using a reversal mold plate having a reversal shape of the long groove formed on the surface, so that the substrate can be provided accurately and inexpensively, The evaluation device can be made inexpensive. Here, “the resin material is applied to the surface of the reversal mold plate and the resin material is cured,” but the resin material is applied to the surface of the reversal mold plate and the shape of the long groove is changed by the hot press or the like. The method of transferring and forming on the surface is also based on the same technical idea and can be said to be within the equivalent scope of the present invention.

  Next, in the alignment step, the substrate is attached to the combined substrate and the cover plate, and the substrate and the cover plate are brought into close contact with each other by supporting the substrate and the cover plate so as to sandwich the substrate and the cover plate. Then, in the next casing attachment step, the casing is attached to the combined substrate and cover plate, and supported so as to sandwich the substrate and cover plate. Thereby, since a fine flow path can be assembled with high accuracy, liquid leakage does not occur between the substrate and the cover plate during the experiment, and damage to the cover plate can be prevented. Therefore, according to the manufacturing method of the present invention, a fine flow path can be assembled with high accuracy and at low cost. The method of manufacturing a scientific phenomenon evaluation apparatus or the method of manufacturing a science experiment teaching material using such an inversion mold is particularly suitable when a soft resin is used as the resin material.

In order to achieve the above object, the invention of claim 8 is a method of manufacturing a scientific phenomenon evaluation apparatus according to any one of claims 1 to 5 , or a method of manufacturing a science experiment teaching material according to claim 6. A substrate forming step for forming a long groove on the surface of the substrate by any one of micromachining methods such as machining by a machining center, electrical discharge machining, ultrasonic machining, photoetching, and microdrilling; A cover plate is attached to cover the long groove to form a fine flow path in the substrate, and a casing is attached to the combined substrate and cover plate so as to sandwich the substrate and cover plate. A method of manufacturing a scientific phenomenon evaluation apparatus or a method of manufacturing science experiment teaching materials, comprising: a casing mounting step for bringing the substrate and the cover plate into close contact with each other To provide.

  According to the present invention, in the substrate forming process, the long groove is formed on the surface of the substrate by any one of the fine machining methods such as machining by a machining center, electric discharge machining, ultrasonic machining, photoetching machining, and microdrilling. Therefore, the substrate can be provided accurately and inexpensively, and the evaluation apparatus can be made inexpensive.

  Next, in the alignment step, the substrate is attached to the combined substrate and the cover plate, and the substrate and the cover plate are brought into close contact with each other by supporting the substrate and the cover plate so as to sandwich the substrate and the cover plate. Then, in the next casing attachment step, the casing is attached to the combined substrate and cover plate, and supported so as to sandwich the substrate and cover plate. Thereby, since a fine flow path can be assembled with high accuracy, liquid leakage does not occur between the substrate and the cover plate during the experiment, and damage to the cover plate can be prevented. Therefore, according to the manufacturing method of the present invention, a fine flow path can be assembled with high accuracy and at low cost. A method for manufacturing a scientific phenomenon evaluation apparatus or a method for manufacturing a science experiment teaching material using such a fine processing method is particularly suitable when a hard resin is used as a resin material.

According to claim 7 or 8 of the present invention, the casing mounting process, the substrate and the cover plate and is combined with purchase against a pair of transparent caul on each side, pinching the pair of wear plate between a connecting means It is preferable to connect as described above. By sandwiching the substrate and the cover plate with a pair of transparent pads, it is not necessary to process the substrate and the cover plate to improve adhesion, and the pair of plates is transparent. Thus, a scientific phenomenon in the flow path can be visually observed.

  Scientific phenomena are various chemical phenomena and physical phenomena of liquids that occur in the above-mentioned fine flow paths. Liquid diffusion phenomena, liquid heat transfer phenomena, liquid mixing phenomena, liquid chemical reactions (for example, , Acid-alkali reaction, hydrolysis reaction) and the like.

As described above, according to the present invention, the evaluation device is formed with a fine flow path having a cross-sectional area of 1 mm ² or less, so that sufficient accuracy to experience advanced technology can be obtained. The amount of chemicals used is small and the environmental impact is small.

  Further, by providing the casing, it is possible to assemble a highly accurate fine flow path without liquid leakage with high accuracy and at low cost.

  Hereinafter, preferred embodiments of a scientific phenomenon evaluation apparatus, a science experiment teaching material, and a manufacturing method thereof according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view for explaining the configuration of a science experiment teaching material 10 which is a scientific phenomenon evaluation apparatus according to the present invention. 2 and 3 are partially enlarged sectional views and the like of FIG. 1. FIG. 2 shows the first liquid reservoir 24 (inside the upper left dotted line in FIG. 1), and FIG. 3 shows the third liquid reservoir 28. (In the lower right dotted line in FIG. 1) is shown.

That is, the science experiment teaching material 10 is arranged in close contact with the substrate 12 having a long groove (14, 16 and 20) having a cross-sectional area of 1 mm ² or less formed on the surface of the plate-like body, and the long groove is formed on the surface of the substrate 12. A transparent cover plate 22 that forms fine flow paths (14A, 16A, and 20A) on the substrate 12 by covering is formed.

  The fine flow path formed by the long grooves (14, 16 and 20) includes a first flow path 14A and a second flow path 16A having substantially the same length that merge at the confluence 18 and the first flow path 16A. The flow path 14A and the second flow path 16A further comprise a third flow path 20A that merges at the merge point 18.

  The other end of the first flow path 14A communicates with the first liquid reservoir 24, which is a cylindrical cavity formed in the cover plate 22, and the other end of the second flow path 16A is covered. The second liquid reservoir 26 that is a cylindrical cavity formed in the plate 22 is communicated, and the other end of the third flow path 20A is a third liquid that is a cylindrical cavity formed in the substrate 12. It communicates with the reservoir 28.

Furthermore, a through-hole 30 is formed in the portion of the cover plate 22 facing the third liquid reservoir 28 so that the third liquid reservoir 28 can communicate with the outside air. The first liquid reservoir 24 and the second liquid The volume of the reservoir 26 and the third liquid reservoir 28 is preferably 5 to 5000 mm ³ . By using such a volume, each phenomenon occurring in the micro channel can be easily controlled.

  The planar sizes of the substrate 12 and the cover plate 22 are not particularly limited, but may be a portable size, for example, 80 × 50 mm due to the nature of the science experiment teaching material 10 used in school. The thicknesses of the substrate 12 and the cover plate 22 are not particularly limited, but can be set to about 5 mm, for example, in view of strength, economy, and the like.

  Although there is no restriction | limiting in particular as a material of the board | substrate 12, From the point which makes the manufacturing method mentioned later easy, more specifically, it is a resin material, More specifically, poly dimethyl sulfoxide (PDMS), poly methyl methacrylate (PMMA). ), Polyvinyl chloride (PVC), ultraviolet curable resin, polycarbonate (PC) and the like can be preferably used.

The cross-sectional area of the elongated groove is formed on the surface of the substrate 12 (14, 16 and 20), as described above, it is 1 mm ² or less, more preferably 0.0025~0.64mm ^2, 0.01~0 .25 mm ² is most preferred. The cross-sectional shape of the long grooves (14, 16, and 20) is not particularly limited, and various shapes such as a rectangle (square, rectangle), trapezoid, V shape, and semicircle can be adopted. From the point to do, a rectangle (square, rectangle) is preferable.

  The material of the cover plate 22 is not particularly limited, but is preferably transparent so that scientific phenomena in the flow path can be visually recognized. As such materials, various resin plates, more specifically, various resins such as polydimethyl sulfoxide (PDMS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), ultraviolet curable resin, polycarbonate (PC), etc. Membranes, more specifically, various glasses (soda lime glass, borosilicate glass, etc.) such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and triacetyl cellulose (TAC) can be employed.

  The cover plate 22 is generally a flat plate having a flat front surface and back surface, but the surface corresponding to the fine flow paths (14A, 16A, and 20A) is formed in the shape of a bowl-shaped convex lens to be enlarged. It is also possible to adopt a configuration in which observation can be performed in such a state.

  A configuration in which the cover plate 22 is opaque and the substrate 12 is transparent can also be employed.

  The surface of the substrate 12 (the surface on which the long groove is formed) and the back surface of the cover plate 22 (the surface that is in close contact with the substrate 12) are formed from the viewpoints of forming the flow paths (14A, 16A, and 20A) and preventing liquid leakage. It is preferable to ensure sufficient flatness.

  Next, a method for manufacturing the science experiment teaching material 10 will be described.

  As a suitable method for forming the substrate 12, any one of a method using the reversal mold 40 for forming the substrate 12, machining by a machining center or the like, electric discharge machining, ultrasonic machining, photoetching, or microdrilling is used. There is a method using one microfabrication method.

  4 and 5 show a method of using the reversal mold 40. FIG. 4A is a top view of the reversal mold 40, FIG. 4B is a side cross-sectional view of the reversal mold 40, FIG. 4C is a side cross-sectional view of the cover plate 22, and FIG. 4D is a cover. FIG. 6 is a top view of the plate 22. The first and second liquid reservoirs 24 and 26 are formed in the cover plate 22 and the through hole 30 is omitted, and the third liquid reservoir 28 is formed in the substrate 12 to penetrate the third liquid reservoir 28. The case where the hole 30 is formed in the cover plate 22 will be described.

  First, a reversal mold 40 is prepared in which the reversal shapes of the long grooves (14, 16 and 20) of the substrate 12 are formed on the surface. It is necessary to form a reverse shape of the third liquid reservoir 28 on the surface of the reverse plate. That is, on the surface of the reversal mold plate 40, a convex flow path mold 42 and a convex third liquid reservoir mold 44 that become long grooves (14, 16 and 20) when reversed are formed. . As a manufacturing method of the reversal mold plate 40, various known fine processing methods such as machining by a machining center or the like, electric discharge machining, ultrasonic machining, photoetching machining, microdrilling, etc. can be adopted. In addition, the cover plate 22 is provided with two molds 46 and 46 which become the first liquid reservoir 24 and the second liquid reservoir 26 by a fine processing method, and the through hole 30 of the third liquid reservoir is formed. Drill.

  Next, a release agent is applied to the surface of the reversal template 40. As this release agent, an appropriate one can be adopted according to the type of the resin material to be the substrate 12, processing conditions (temperature, etc.), and the like.

  Next, as shown in FIG. 5A, after the reversal mold 40 is surrounded by a mold 46, the surface of the reversal mold 40 (the convex flow path mold 42 and the convex third liquid reservoir). A resin material is poured and applied to the side where the mold 44 is formed, and the resin material is cured. When the resin material is, for example, an ultraviolet curable resin, the resin material after application is irradiated with ultraviolet rays and cured. In the case where the resin material is a thermoplastic resin such as polyvinyl chloride (PVC), for example, the resin material is applied to the surface of the reversal mold plate 40 and thermal transfer molding is performed by a hot press machine.

  Then, as shown in FIG. 5B, the cured resin material is peeled off from the inversion mold plate 40. Thereby, the board | substrate 12 in which the long groove | channel (14,16 and 20) and the 3rd liquid reservoir part 28 were formed is manufactured.

  Next, the formed substrate 12 and the cover plate 22 of FIG. 4D prepared in advance are aligned as shown in FIG. The mating surfaces may be bonded with an adhesive or the like.

  Next, as shown in FIG. 5D, after the substrate 12 and the cover plate 22 are turned upside down, a casing 49 is attached to the substrate 12 and the cover plate 22. That is, a pair of transparent abutting plates 48, 48 are applied to both sides where the substrate 12 and the cover plate 22 are combined, and a plurality of bolts 50, 50. 52 and so on. In this case, it is preferable that at least four corners of the state in which the substrate 12 and the cover plate 22 are combined are evenly sandwiched between the bolt 50 and the nut 52. As a result, the adhesion is improved, so that no liquid leaks between the substrate 12 and the cover plate 22 or the substrate 12 or the cover plate 22 is damaged during the experiment.

  Further, in the case of the manufacturing method of the science experiment teaching material 10 using the fine machining method, the substrate 12 shown in FIG. 5B is formed by machining, electric discharge machining, ultrasonic wave using a machining center or the like instead of the reversal template 40. Since only the fine processing method such as processing, photoetching processing, microdrilling or the like is used, the steps of FIGS. 5C and 5D are the same, and detailed description thereof is omitted.

  The manufacturing method of the science experiment teaching material 10 using the above-described inversion mold 40 is particularly suitable when a soft resin is used as the resin material. Further, in the case of polydimethyl sulfoxide (PDMS) among the soft resins, the adhesion between the substrate 12 and the cover plate 22 is very good. Therefore, when PDMS is used for at least the substrate 12 of the cover plate 22 and the substrate 12. In addition, the mounting of the casing 49 can be omitted.

  Moreover, the manufacturing method of the science experiment teaching material 10 using the above-described fine processing method is particularly suitable when a hard resin is used as the resin material. However, in the case of a hard resin, the adhesion between the substrate 12 and the cover plate 22 tends to deteriorate, and by attaching the casing 49, liquid leakage from between the substrate 12 and the cover plate 22 is surely prevented. it can. For example, when polymethyl methacrylate (PMMA) is used as the resin material for the substrate 12, the casing 49 is particularly effective in improving the adhesion.

  Next, a method for using the science experiment teaching material 10 according to the present invention will be described. As the science experiment teaching material 10, it is necessary to provide the following members 1) to 12) as a set.

1) Inverted template 40
2) Resin material for substrate 12 3) Formwork 46 for forming substrate 12
(Used as a mold when the resin is poured when the substrate 12 is formed.)
4) Cover plate 22
5) Dropper for sample liquid (Used to supply necessary sample liquid (reagent) to the first liquid reservoir 24 and the second liquid reservoir 26 depending on the test purpose. You can wash one and use it again.)
6) Sample liquid inlet / outlet sealing tape (covers the first liquid reservoir 24 and the second liquid reservoir 26, which are sample liquid supply holes. Pipette the sample liquid into the first liquid reservoir 24 and the second liquid. (It can be used as a lid for the third liquid reservoir 28.)
7) Needle (When supplying or recovering the sample liquid, it is necessary to supply the air corresponding to the fluctuation of the liquid into the first liquid reservoir 24 and the second liquid reservoir 26 when the liquid is sent and received. (It is for making holes in the tape accordingly.)
8) Casing 49
(When this experimental set is assembled, this casing is attached for the purpose of preventing liquid leakage between the cover plate 22 and the substrate 12 and preventing damage to the cover plate 22 and the like. Can be equipped with various functions according to the purpose of the experiment, for example, attachment of a magnifying glass or the like for easy observation of the channel.
9) Liquid feeding means (When heat is applied to the first liquid reservoir 24 and the second liquid reservoir 26 while the first liquid reservoir 24 and the second liquid reservoir 26 are covered with tape) The liquid and / or gas in the first liquid reservoir 24 and the second liquid reservoir 26 is volume-expanded by being applied to the tape and heated at a body temperature, etc. A method in which the inside of the first liquid reservoir 24 and the second liquid reservoir 26 is pressurized by a method using the principle of a pump and the liquid inside is sent out is possible.

  In this case, when the tape is affixed to the third liquid reservoir 28 using the needle of the above-mentioned 7), a small hole is made in this.

Further, by reducing the pressure of the third liquid reservoir 28 using a pump or the like, the sample liquid in the first liquid reservoir 24 and the second liquid reservoir 26 is put into the flow paths (14A, 16A and 20A). In this case, the liquid can be fed by making a small hole in the tape lids of the first liquid reservoir 24 and the second liquid reservoir 26 using the above-mentioned needle 7). )
10) Test sample solution (reagent)
(A necessary chemical suitable for the purpose as a test reagent for conducting this scientific experiment is supplied in a reagent container. Sample liquids include, for example, coloring liquids such as pigments or pigments, and water. And a clear liquid.)
11) Experiment explanation (Attachment of explanations of events that can be learned with this set, such as the purpose of the experiment conducted in this set, explanation of phenomena, and application uses, if necessary.)
12) Experimental method procedure manual This set is for making the students hand-made the board 12, but when the board 12 is not hand-made, the board is a completed board instead of 1) to 3). 12 should be inserted.

  Details of experiments using this set are detailed below. 6 and 7 are cross-sectional views showing the procedure of the experimental method. Among these, FIG. 6 shows a time-series procedure in the first liquid reservoir 24 and the second liquid reservoir 26. On the other hand, FIG. 7A shows the state of the start of the experiment in which the sample liquid is supplied to the first liquid reservoir 24 and the second liquid reservoir 26, and FIG. The state of the end of the experiment when the liquid reached is shown.

  As shown in FIG. 6A, a predetermined amount of sample liquid 34 is supplied to the first liquid reservoir 24 (or the second liquid reservoir 26) by the sample liquid dropper 32. As shown in FIGS. 6B and 7A, the sample liquid 34 communicates with the flow path 14A (or 16A) in the first liquid reservoir 24 (or the second liquid reservoir 26). Supplied to close the part.

  Next, as shown in FIG. 6C, the first liquid reservoir 24 (or the second liquid reservoir 26) is covered with a sample liquid inlet / outlet sealing tape 36. The tape 36 is coated on one side (the lower side in the figure) with an adhesive, and thereby the first liquid reservoir 24 (or the second liquid reservoir 26) is blocked from outside air.

  Next, as shown in FIG. 6D, the fingertip 38 is brought into contact with the tape 36. Thereby, a liquid feeding means is formed in the first liquid reservoir 24 (or the second liquid reservoir 26). As described above, in this liquid feeding means, the gas in the first liquid reservoir 24 (or the second liquid reservoir 26) is volume-expanded by the heat of the fingertip 38, and the sample liquid 34 is passed through the flow path 14A (or 16A). ).

  Further, in the same configuration as shown in FIG. 6D, this liquid feeding means pushes the tape 36 with the fingertip 38 to bend downward, and the volume of the first liquid reservoir 24 (or the second liquid reservoir 26). This may be done by feeding the sample liquid 34 into the flow path 14A (or 16A).

  As shown in FIG. 7B, the liquid feeding means described above causes the sample liquid 34 to reach the third liquid reservoir 28, and the experiment ends. At this time, the sample liquid 34 is simultaneously fed into the flow path 14A and the flow path 16A from the first liquid reservoir 24 and the second liquid reservoir 26 of FIG. It can be observed that they merge at 18.

  In particular, the sample liquid 34 supplied to the first liquid reservoir 24 and the second liquid reservoir 26 is differentiated in color so that the sample liquid 34 can be easily observed to join at the confluence 18. For example, a colored sample liquid 34 is supplied to the first liquid reservoir 24 and a colorless and transparent sample liquid 34 is supplied to the second liquid reservoir 26.

  The experimenter observes the flow path 20A after the confluence 18 of the sample liquid 34 flowing in this manner, so that a coloring molecule such as a dye or pigment enters the transparent liquid from the colored liquid flowing in the microchannel. It is possible to confirm the phenomenon of diffusing toward.

  Further, not only the color of the sample liquid 34 supplied to the first liquid reservoir 24 and the second liquid reservoir 26 is changed, but also the sample liquid 34 is merged at the junction 18 by changing the viscosity. Can be observed differently.

  In order to make it easier to observe these phenomena, a magnifying glass, a magnifying glass, or the like can be used. Further, as described above, the cover plate 22 in the portion of the flow path 20A can have a magnifying glass function (lens function).

  According to the science experiment teaching material 10 described above, in order to have children enjoy dreams of science experiments in the micro world, the important parts can be simplified as much as possible, and can be made inexpensive. Can be performed with high accuracy.

  In particular, when qualitatively observing the diffusion phenomenon of molecules that cause chemical reactions, it is very important that a plurality of liquids flow in the flow path at least under the same conditions in order to improve the experimental accuracy. Can fully answer this request. That is, a relatively accurate experiment can be performed with a very simple and inexpensive means. In addition, because of experiments in the micro world, the amount of chemicals represented by dyes or pigments is very small, and the environmental burden can be greatly reduced.

  As mentioned above, although the embodiment of the scientific phenomenon evaluation apparatus, the science experiment teaching material, and the manufacturing method thereof according to the present invention has been described, the present invention is not limited to the above embodiment, and various aspects can be adopted.

  For example, in this embodiment, an example of an experimental teaching material capable of observing a phenomenon in which two types of sample liquids 34 merge at the junction 18 and coloring molecules such as pigments or pigments diffuse toward the transparent liquid is observed. Although explained, it can be applied to various experimental teaching materials.

  In the present embodiment, the first liquid reservoir 24 and the second liquid reservoir 26 are formed on the cover plate 22 and the third liquid reservoir 28 is formed on the substrate 12, but other aspects, for example, A mode in which all the liquid reservoirs are formed on the cover plate 22 can also be adopted.

  In the present embodiment, three sets of flow paths and liquid reservoirs are provided. However, a configuration in which four or more sets are provided can also be employed.

  Furthermore, in order to supply the sample liquid (reagent) to the liquid reservoir (24, 26, etc.), the sample liquid dropper 32 is used, but instead of this, a syringe having the same function, a micro syringe, etc. Can also be used. In general, it is desirable to use an inexpensive dropper as a science experiment teaching material, but depending on the purpose of the test, it may be preferable to have a similar function as described above.

The top view explaining the structure of the evaluation apparatus of the scientific phenomenon which concerns on this invention Partially enlarged cross section of FIG. Partial enlarged sectional view of FIG. Top view and side cross-sectional view showing reversal mold plate and cover plate to be prepared when manufacturing a substrate using reversal mold plate in the method of manufacturing a scientific experimental device Explanatory drawing explaining the procedure of the manufacturing method of a science experiment apparatus Explanatory drawing showing the procedure of the experiment method Explanatory drawing showing the procedure of the experiment method

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Science experiment teaching material, 12 ... Board | substrate, 14, 16, 20 ... Long groove, 14A ... 1st flow path, 16A ... 2nd flow path, 18 ... Confluence, 20A ... 3rd flow path, 22 ... Cover Plate: 24 ... First liquid reservoir, 26 ... Second liquid reservoir, 28 ... Third liquid reservoir, 30 ... Through hole, 32 ... Syringe for sample liquid, 34 ... Sample liquid, 36 ... Tape for sealing, 38 ... Fingertips, 40 ... Reverse mold plate, 42 ... Convex flow channel mold, 44 ... Convex third liquid reservoir mold, 46 ... Formwork, 48 ... Patch plate, 49 ... Case, 50 ... Bolt, 52 …nut

Claims (9)

A substrate in which a long groove having a cross-sectional area of 1 mm ² or less is formed on the surface of the plate-like body;
A cover plate disposed in close contact with the surface of the substrate and forming a fine flow path in the substrate by covering the long groove;
A casing that supports the substrate and the cover plate by sandwiching from both sides of the substrate and the cover plate,
The casing is
A pair of transparent backing plates applied to both sides of the substrate and the cover plate,
With the connecting means for connecting the pair of contact plates so as to sandwich the substrate and the cover plate, the substrate and the cover plate are brought into close contact without using an adhesive, and
An apparatus for evaluating a scientific phenomenon , wherein the scientific phenomenon in the flow path can be visually recognized by making the substrate and / or the cover plate transparent . 2. The scientific phenomenon evaluation apparatus according to claim 1 , wherein the substrate and / or the cover plate is made of a resin material. One end of a plurality of said flow path, with merge at the confluence of one position, a plurality of the flow path and the other end according to claim 1 or 2 in communication with the liquid reservoir volume 5 to 5000 mm ³ each Scientific phenomenon evaluation device. One end of the first flow path and the second flow path, which are the two flow paths having substantially the same length, merge at one merge point,
The other end of the first flow path communicates with a first liquid reservoir having a volume of 5 to 5000 mm ³ ;
The other end of the second flow path communicates with a second liquid reservoir having a volume of 5 to 5000 mm ³ ;
One end of a third flow path, which is one of the flow paths, communicates with the confluence, and the other end of the third flow path communicates with a third liquid reservoir having a volume of 5 to 5000 mm ³ . The scientific phenomenon evaluation apparatus according to any one of claims 1 to 3 . 5. The scientific phenomenon according to claim 4 , wherein the cover plate is formed with a through hole through which one or more of the first liquid reservoir, the second liquid reservoir, and the third liquid reservoir can communicate with outside air. Evaluation device. A science experiment teaching material, wherein the scientific phenomenon evaluation apparatus according to any one of claims 1 to 5 is a portable experiment apparatus. A method for manufacturing a scientific phenomenon evaluation apparatus according to any one of claims 1 to 5 , or a method for manufacturing a science experiment teaching material according to claim 6 ,
Using a reversal mold plate having a reversal shape of a long groove formed on a substrate formed on the surface, a resin material is applied to the surface of the reversal mold plate, the resin material is cured, and the resin material after curing Substrate forming step of forming the substrate by peeling the substrate from the reversal mold plate,
A matching step of forming a fine flow path in the substrate by covering a cover plate on the surface of the substrate and covering the long groove;
A casing mounting step for attaching the casing to the combined substrate and the cover plate, and supporting the substrate and the cover plate so as to sandwich the substrate and the cover plate, thereby bringing the substrate and the cover plate into close contact with each other. A method for producing an evaluation device or a method for producing a science experiment teaching material. A method for manufacturing a scientific phenomenon evaluation apparatus according to any one of claims 1 to 5 , or a method for manufacturing a science experiment teaching material according to claim 6 ,
A substrate forming step of forming a long groove on the surface of the substrate by any one of micromachining methods such as machining by a machining center, electric discharge machining, ultrasonic machining, photoetching machining, and microdrilling;
A matching step of forming a fine flow path in the substrate by covering a cover plate on the surface of the substrate and covering the long groove;
A casing mounting step for attaching the casing to the combined substrate and the cover plate, and supporting the substrate and the cover plate so as to sandwich the substrate and the cover plate, thereby bringing the substrate and the cover plate into close contact with each other. A method for producing an evaluation device or a method for producing a science experiment teaching material. The casing attaching step includes
9. The science according to claim 7 or 8 , wherein a pair of transparent patch plates are applied to both sides of the substrate and the cover plate, and the pair of patch plates are connected so as to be sandwiched by a connecting means. A method of manufacturing a phenomenon evaluation apparatus or a method of manufacturing science experiment teaching materials.

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