Fluid device

Abstract

To provide a fluid device with high production efficiency and quality stability. 【Solution means】The fluid device 1 includes an upper member 2 and a lower member which are two plate-like members. In the plate-like members, the upper member has a liquid inlet I, an upper fluid passage, and a slit-shaped energization port 21, and the lower member has a liquid outlet and a lower fluid passage formed therein. The plate-like members are made of transparent plastic. The upper and lower members each have a side size of 80 to 100 mm and a thickness of 1.9 to 2.1 mm, and the thickness is 10 times or more the width of the energization port. The upper and lower members have a plywood structure in which the surfaces on which the upper and lower fluid passages are formed are joined together.

Description

Technical Field

[0001] This utility model relates to a fluid device used in the medical field.

Background Art

[0002] In the field of medical research, fluid devices are used to conduct comparative tests on the effects of drugs on cells and the like. The fluid device is in the form of two members with inlets, outlets, flow paths, and electrical connection ports for cells and the like formed on a plate-like piece combined on a plywood board (see, for example, Patent Document 1).

[0003] Conventional fluid devices are mainly made of resin such as plastic, and for the formation of flow paths and the like, cutting processing by equipment such as a machining center has mainly been used so far.

[0004] However, in this conventional method for forming flow paths of fluid devices, the processing time tends to be long, and the thickness of the small pieces of resin used as the material tends to be a thick material of 4 mm or more, leading to an increase in manufacturing costs. In addition, warping occurs due to internal stress generated in the resin material during processing, deteriorating the quality of the fluid device and causing a decrease in test accuracy.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The purpose of this invention is to provide a fluid device with high production efficiency and quality stability.

Means for Solving the Problems

[0007] In order to achieve the above object, the invention according to claim 1 includes an upper member and a lower member which are two plate-like members. In the plate-like members, a liquid inlet, an upper liquid flow path, and a slit-shaped energization port are formed in the upper member, and a liquid discharge port and a lower liquid flow path are formed in the lower member. The plate-like members are made of transparent plastic. The upper member and the lower member each have a side length of 80 to 100 mm and a thickness of 1.9 to 2.1 mm, and the thickness is 10 times or more the width of the energization port. The upper member and the lower member have a plywood structure in which the surfaces on which the upper flow path and the lower flow path are formed are joined together. It is a fluid device, characterized in that. The invention according to claim 2 is the fluid device according to claim 1, characterized in that the plate-like member is made of polycarbonate. The invention according to claim 3 is the fluid device according to any one of claims 1 or 2, characterized in that the upper member and the lower member are joined by a double-sided tape, and an internal flow path is formed in the double-sided tape. The invention according to claim 4 is the fluid device according to any one of claims 1 or 2, characterized in that the plate-like member is formed by injection molding.

Advantages of the Invention

[0008] According to the fluid device of this invention, it is possible to suppress an increase in manufacturing cost while ensuring quality deterioration and test accuracy.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0010] Embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the size, interval, number, and other details of the configuration of each part in the drawings are significantly simplified and exaggerated compared to the actual object for the sake of visual recognition and understanding.

[0011] As shown in FIGS. 1 to 4, the fluid device 1 includes an upper member 2 and a lower member 3, which are two plate-like members, and has a form of a plywood structure in which the surfaces of both are joined. In the plate-like members, the upper member 2 has a plurality of (seven in this actual embodiment) circular openings, i.e., liquid inlets I, and upper member flow paths connecting between the liquid inlets I, between the liquid inlets I and an internal flow path F described later, and two slit-shaped openings, i.e., energization ports 21, and further one electrolytic solution inlet or outlet 22 is formed at each location. In addition, the lower member 3 has a plurality of (14 in this embodiment) circular openings, i.e., liquid outlets 0, formed therein.

[0012] The plate-like members, i.e., the upper member 2 and the lower member 3, are made of transparent plastic. In this embodiment, the plastic is mainly made of polycarbonate.

[0013] The size of the plate-like members, i.e., the upper member 2 and the lower member 3, is preferably such that the size of each side is 80 to 100 mm and the thickness is 1.9 to 2.1 mm. Also, the width of the energization port 21 is 0.1 to 0.2 mm. Therefore, it can be said that it is preferable that the thickness of the plate-like member is 10 times or more the width of the energization port 21.

[0014] In this embodiment, the upper member 2 and the lower member 3 are formed by injection molding of plastic. By forming by injection molding, it can be formed with the relatively thin thickness described above instead of the thick object of 4 mm or more as in the conventional case. Therefore, it is possible to suppress the cost during manufacturing while maintaining the quality.

[0015] As an example, the conditions for injection molding are as follows. Molding machine: TOYO100III is used Mold temperature: 100 to 105 [°C] Resin temperature: 295~310 [°C] Mold clamping force: 100 [Ton] Primary pressure: 1000~1200 [kgf] Secondary pressure: 700~900 [kgf] Injection speed: 40~100 [mm / s] Material: Polycarbonate material

[0016] Also, the mold dimensions and weight are approximately as follows. Dimensions: 200×250×230 [mm] Weight: 88 [kg]

[0017] The dimensions of the molded product formed under such mold and molding conditions are, for example, as follows. Upper part 2: Longitudinal 100.52 [mm] · Transverse 80.45 [mm] Lower part 3: Longitudinal 100.00 [mm] · Transverse 79.94 [mm] Thickness: 2.0 mm

[0018] The fluid device has a plywood structure in which the surfaces of the upper part 2 and the lower part 3 formed with the upper flow path and the lower flow path are joined. However, it is preferable that the upper part 2 and the lower part 3 are joined with a medical double-sided tape. Also, an internal flow path F is formed in the double-sided tape. The internal flow path F communicates the liquid inlet I and the liquid outlet O so that liquid can flow from the liquid inlet I to the liquid outlet O.

[0019] When the fluid device 1 is used, a drug is placed at the liquid outlet 0, and a test liquid containing cells is supplied to the flow path from the liquid inlet I. An electrolytic solution is introduced from the electrolytic solution inlet 22, and a voltage is applied from the power supply port 21. The drug is dissolved in the test liquid that has flowed through the upper flow path, the internal flow path F, and the lower flow path, and the effect of the drug on the cells is evaluated.

Explanation of symbols

[0020] 1 Fluid device 2 Upper part 21 Power supply port 22 Electrolytic solution inlet (outlet) Bottom product I Liquid inlet O Liquid outlet F Internal flow path

Claims

1. Comprising an upper object and a lower object which are two plate-like members, In the plate-like members, a liquid inlet, an upper object flow path, and a slit-shaped energization port are formed in the upper object, and a liquid discharge port and a lower object flow path are formed in the lower object. The plate-like members are made of transparent plastic, and the upper object and the lower object each have a side length of 80 to 100 mm and a thickness of 1.9 to 2.1 mm. The thickness is 10 times or more the width of the energization port. The upper object and the lower object have a plywood structure in which the surfaces on which the upper flow path and the lower flow path are formed are joined together. A fluid device, characterized by the above.

2. The plate-like member is made of polycarbonate. A fluid device according to claim 1, characterized by the above.

3. The upper object and the lower object are joined by a double-sided tape. An internal flow path is formed in the double-sided tape. A fluid device according to any one of claims 1 or 2, characterized by the above.

4. The plate-like member is formed by injection molding. A fluid device according to any one of claims 1 or 2, characterized by the above.

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