JP2001224355A - Double-sided petri dish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-sided petri dish in which the cover is easily engaged to the main body and the area of medium is the same. SOLUTION: In a petri dish consisting of a main body and a cover body, the area of the bottom plate of the main body and that of the top plate of the cover body are brought to be the same and the front portion of the side wall of the cover body is brought to have a larger diameter through a leveled portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a petri dish for culturing bacteria and tissues, and more particularly to a double-sided petri dish in which both a main body and a lid can be used.

[0002]

2. Description of the Related Art Clinical laboratory, clinical laboratory,
Bacteria and tissues are cultivated in food research laboratories, universities, and various other laboratories for inspection, testing, and research of bacteria and tissues. Petri dishes are used for culturing these bacteria and the like. In a conventional petri dish of this type, a main body 102 and a lid 103 as shown in FIGS. 9 and 10 are formed of synthetic resin or glass, and a culture medium 120 is dispensed toward the main body 102. Inoculate (smear) test sample (bacterial solution, etc.)
Culture.

In this Petri dish, one kind of medium is used for one Petri dish composed of the main body 102 and the lid 103, and only one specimen can be cultured. In this case, when the same subject is to be cultured simultaneously in a plurality of different media, a plurality of Petri dishes into which each of those media is injected are required, and a plurality of Petri dishes are simultaneously injected in the same medium. Even when culturing a subject, a petri dish into which a medium corresponding to the number of subjects is injected is required.

[0004] As described above, in the conventional petri dish, the number of used petri dish increases, the work area required for inspection needs to be large, and a large space is required in a furan apparatus and a refrigerator used for curing.

Therefore, a double-sided petri dish disclosed in Japanese Utility Model Publication No. 60-22000 has been proposed to solve such a problem. This petri dish is, as shown in FIG.
02 and the lid 103, the lid 1
An inner wall 108 is provided inside the side wall 107 of the main body 103 at an interval 109 at which the side wall 105 of the main body 102 can fit. According to this petri dish, the main body 102 and the lid 103
The mediums 120 and 130 can be made in both of them, and two kinds of mediums can be made in one petri dish, so that the number of petri dishes used is small even if the number of specimens is large.

[0006]

However, the conventional petri dish has a structure in which the inner wall 108 is provided inside the side wall 107 of the lid 103 with a space 109 at which the side wall 105 of the main body 102 can be fitted. The body 103 is the body 10
Since the two side walls 105 must be fitted so as to fit into the space 109, it is troublesome. Further, since the areas of the culture media 120 and 130 of the main body 102 and the lid 103 are different, culture under the same condition cannot be performed. There are inconveniences such as lowering the inspection accuracy (probability) of bacteria and the like.

The present invention has been made in view of the above circumstances, and provides a double-sided petri dish which solves the above-mentioned conventional problems, in which the cover can be easily fitted to the main body, and which has the same area of the culture medium.

[0008]

According to a first aspect of the present invention, there is provided a double-sided petri dish comprising a main body and a lid, wherein an area surrounded by a side wall of a main body bottom plate and a lid are provided. It is characterized in that the area surrounded by the side wall of the body top plate is the same, and the distal end of the lid side wall is formed as a large diameter portion via a step.

Further, in the double-sided petri dish according to a second aspect of the present invention, a ventilation means is provided between the main body and the lid so as to ventilate the petri dish even when the lid is fitted to the main body. It is characterized by the following.

According to a third aspect of the present invention, in the double-sided petri dish, the ventilation means is formed in a step on the side wall of the lid, and the step on the side wall of the lid and the side wall of the main body when the lid is fitted to the main body. Characterized by a plurality of protrusions forming a gap between the upper end and the upper end.

Further, in the double-sided petri dish according to a fourth aspect of the present invention, the ventilation means is a ventilation notch provided in a peripheral edge of an upper end of a side wall of the main body.

Further, in the double-sided petri dish according to a fifth aspect of the present invention, a sealing member for sealing the petri dish by contacting the upper end of the main body side wall when the lid is fitted to the main body is provided on the step portion of the lid side wall. It is characterized by being provided.

Further, the double-sided petri dish according to a sixth aspect of the present invention is characterized in that a drip stop for dew condensation is interposed between the main body and the lid.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a double-sided petri dish according to an embodiment of the present invention in which a main body and a lid are separated, and FIG. 2 is a cross-sectional view showing a use state of the double-sided petri dish of the embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a double-sided petri dish;
It is composed of a main body 2 and a lid 3 fitted (covered) with the main body 2, and the main body 2 and the lid 3 are integrally formed of synthetic resin or glass. The area surrounded by the side wall 5 of the bottom plate 4 of the main body 2 and the area surrounded by the side wall 7 of the top plate 6 of the lid 3 are formed to be the same. The side wall 5 of the main body 2 rises substantially vertically, and the side wall 7 of the lid 3 is formed substantially vertically by a predetermined length.
The inner diameter of the main body 2 and the lid 3 in this portion are the same.
Therefore, as shown in FIG.
And 30, the medium 20 of the main body 2 and the medium 30 of the lid 3 have the same area and can be formed under the same conditions.

The front end of the side wall 7 of the lid 3 has a step 9
The upper end of the side wall 5 of the main body 2 is formed by fitting the lid 3 to the main body 2 as shown in FIG. The abutment position of the lid 3 is stopped by contacting the step 9 of the third member 3. Therefore, even if the culture medium 30 is formed on the lid 3 as shown in FIG. 2, the influence of the side wall 5 of the main body 2 is not affected.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention, in which a main body and a lid are separated from each other. Omitted. In this example, a dew condensation stop 1 is provided between the main body 2 and the lid 3.
In this way, it is possible to prevent the condensation from the lid 3 side from dropping and adversely affecting the culture medium and culture on the main body 1 side. The dew-condensation stopper 10 may have any configuration as long as the dew condensation is dropped when the dew-condensation drops to close the opening of the main body 2 or the lid 3. At this time, a material that does not affect the culture of bacteria or the like is selected.
The outer peripheral end of the dew condensation stop 10 of this example is bent in a hook shape, and can be fitted to the side wall end of the lid 7.

In addition, bacteria include anaerobic bacteria and aerobic bacteria. In the present invention, since the upper end of the side wall 5 of the main body 2 is in contact with the step 9 of the lid 3, the hermetic seal is considered to be sufficient for cultivation of anaerobic bacteria. As shown in FIG. 4, the sealing material 11 is provided on the step 9 of the lid 3.
It is preferable that the upper end of the side wall 5 of the main body 2 be in contact with the sealing material 11.

In the case of cultivation of aerobic bacteria, it is necessary to provide a gas-permeable means between the main body 2 and the lid 3 for ventilating the petri dish. As shown in FIGS. 5 and 6, when the lid 3 is fitted to the body 2, the ventilation means may be a stepped portion 9 of the side wall 7 of the lid 3.
A plurality of projections forming a gap between the step 9 of the main body 2 and the upper end of the side wall 5 of the main body 2 are provided, or a cutout 13 for ventilation is provided on the peripheral edge of the upper end of the side wall 5 of the main body 2 as shown in FIGS. Examples of such means include providing.

Although the above embodiment has been described with reference to a circular dish, the present invention is not limited to this.
For example, it may be rectangular.

[0021]

As described in detail above, the present invention has the following effects. (1) Since the main body and the lid are double-sided Petri dishes that can be used for culture, the number of Petri dishes used can be small even if the number of subjects is large. (2) Since the area of the culture medium of the main body and that of the lid are the same and cultivation can be performed under the same conditions, the inspection accuracy can be improved. (3) The fitting of the lid to the main body is easy. (4) When a sealing material is provided at the step of the lid, the inside of the Petri dish is sealed, which is optimal for cultivation of anaerobic bacteria, and when a ventilation means is provided, it is optimal for cultivation of aerobic bacteria. (5) Further, by providing a drip stop for dew condensation, it is possible to prevent adverse effects on the culture medium and culture due to the dew drop.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a state where a main body and a lid of a double-sided petri dish according to an embodiment of the present invention are separated.

FIG. 2 is a cross-sectional view showing a use state of the double-sided petri dish according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention in a state where a main body and a lid are separated.

FIG. 4 is an enlarged partial cross-sectional view when a sealing material is provided.

FIG. 5 is a perspective view when a projection is provided as a ventilation unit.

FIG. 6 is an enlarged partial cross-sectional view when a projection is provided as ventilation means.

FIG. 7 is an enlarged partial cross-sectional view when a notch is provided as ventilation means.

FIG. 8 is an enlarged partial cross-sectional view when a notch is provided as a ventilation unit.

FIG. 9 is a cross-sectional view showing a conventional example in a state where a main body and a lid are separated.

FIG. 10 is a cross-sectional view illustrating a use state of a conventional example.

FIG. 11 is a cross-sectional view of another conventional example in a state where a main body and a lid are separated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double-sided Petri dish 2 Main body 3 Lid 4 Bottom plate of main body 5 Side wall of main body 6 Top plate of lid 7 Side wall of lid 8 Large diameter part 9 Step part 10 Drop prevention of dew condensation 11 Seal material 12 Projection 13 Notch 20, 30 Medium

Claims (6)

[Claims] 1. A petri dish comprising a main body and a lid,
The area surrounded by the side wall of the main body bottom plate and the area surrounded by the side wall of the lid top plate are the same, and the distal end of the lid side wall is formed as a large diameter portion via a step. Double sided Petri dish. 2. The double-sided petri dish according to claim 1, wherein a ventilation means is provided between the main body and the lid so as to be able to ventilate into the petri dish even when the lid is fitted to the main body. . 3. A plurality of ventilation means formed in a step portion of a side wall of the lid, forming a gap between the step portion of the lid side wall and an upper end of the main body side wall when the lid is fitted to the main body. The double-sided petri dish according to claim 2, wherein the projection is a projection. 4. A double-sided petri dish according to claim 2, wherein said ventilation means is a notch for ventilation provided at a peripheral edge of an upper end of a side wall of the main body. 5. The sealing member according to claim 1, wherein a stepped portion of the side wall of the lid is provided with a sealing material that comes into contact with the main body when the lid is fitted to the main body to seal the petri dish. Petri dishes on both sides. 6. The double-sided petri dish according to claim 1, wherein a stopper for dew condensation is interposed between the main body and the lid.