WO2010128569A1

WO2010128569A1 - Petri dish

Info

Publication number: WO2010128569A1
Application number: PCT/JP2009/068959
Authority: WO
Inventors: 学司加藤; 順一桑原; 貴行瀧口
Original assignee: 株式会社サンプラテック
Priority date: 2009-05-08
Filing date: 2009-11-06
Publication date: 2010-11-11
Also published as: JP2012143157A

Abstract

A Petri dish (100A) comprising: a dish body (200) which comprises a bottom plate (210) and a side wall (220) rising up from the periphery of the bottom plate (210); and a cover (300) which comprises a top plate (310) and a skirt (320) hanging from the periphery of the top plate (310). The dish body (200) is combined with the cover (300) in such a manner that the skirt (320) is positioned outside the side wall (220). From the combined state as described above, the cover (300) can turn obliquely to the dish body (200) and this turn is restricted to a preset level. Owing to this constitution, a space (S) can be easily provided between the dish body (200) and the cover (300) by inclining the cover (300) in the closed state.

Description

Petri dish

The present invention relates to a petri dish used for bacterial culture, cell culture, tissue culture or the like.

The petri dish is composed of a combination of a petri dish body called a dish and a lid that covers the top of the petri dish body. The petri dish body has a circular bottom plate and a cylindrical side wall that rises from the outer periphery of the bottom plate. The lid has a circular top plate portion, and a cylindrical side wall portion that hangs down from the outer periphery of the top plate portion and has an inner diameter larger than the outer diameter of the side wall portion of the petri dish body.

Conventionally, such petri dishes were generally made of glass, but recently, there have been some that are configured in a resin-made disposable system such as that disclosed in Patent Document 1, for example.

However, the basic configuration of the petri dish, which simply covers the petri dish body, has not changed for many years.

JP-A-7-223257

By the way, when injecting, for example, a culture medium or a specimen into the petri dish body, if this work is performed with the lid completely removed, there is a high possibility that various germs in the air will enter the petri dish body. Therefore, it is not preferable. Therefore, conventionally, for example, holding a petri dish with a lid in one hand, picking the lid with the finger of one hand and tilting it to open a gap between the petri dish body and the lid, from there For example, a medium or specimen is injected by operating the pipette with the other hand, and then the lid is replaced and the gap is closed.

This work is very difficult until it gets used to, and it can be said that it is impossible when the petri dish is large with respect to the hands of the worker. In addition, the finger of the hand holding the petri dish may be inadvertently caught on the opening of the petri dish body, causing contamination.

The present invention has been conceived under such circumstances, and provides a petri dish that can easily perform an operation of opening a gap between the petri dish body and the lid by tilting the lid in a closed state. Is the subject.

The petri dish provided by the present invention comprises a petri dish body having a bottom plate portion and a side wall portion rising from the peripheral portion of the bottom plate portion, and a lid having a top plate portion and a skirt portion depending from the peripheral portion of the top plate portion. The petri dish body and the lid are petri dishes combined so that the skirt portion is positioned outside the side wall part, and the lid is inclined with respect to the petri dish body from the combined state. It is possible to rotate, and the rotation more than a predetermined is restricted.

In a preferred embodiment, the side wall portion of the petri dish body and the skirt portion of the lid have a cylindrical shape.

In a preferred embodiment, the side wall portion of the petri dish body has an outward flange formed on the entire circumference or a part of the lower portion thereof, and the lid has a lower surface of the top plate portion that is an upper end of the side wall portion. When the lower end of the skirt portion is in contact with the corner portion formed by the outward flange and the side wall portion, the rotation more than a predetermined amount is restricted.

In a preferred embodiment, there is provided a lid holding means for holding the lid in a predetermined inclined posture rotated with respect to the petri dish body.

In a preferred embodiment, the lid holding means extends outward from the side wall portion of the petri dish body and supported by the outward flange and outward from the skirt portion of the lid. The lid is rotated in the circumferential direction with respect to the petri dish body in a state of being rotated with respect to the petri dish body, and the locked part is made to rotate. By being locked by the locking portion, the predetermined tilted posture is maintained.

In a preferred embodiment, the locking portion is formed with a protrusion for restricting the locked portion locked to the locking portion so as not to move in the circumferential direction of the petri dish body.

In a preferred embodiment, a convex portion is provided on the upper surface of the lid so as to correspond to the formation position of the locked portion in the circumferential direction of the lid.

In a preferred embodiment, the petri dish body is provided with an index description piece that also serves as the locking portion.

In a preferred embodiment, a gap having a predetermined shape is formed in a plan view between the index writing piece and the side wall.

In a preferred embodiment, the lid is formed with a flange portion extending outward from a peripheral portion of the top plate portion, and the locked portion is further projected from the flange portion. Yes.

In a preferred embodiment, the flange portion is inclined so as to be displaced downward toward the outside.

In a preferred embodiment, it further includes a lock mechanism that locks the lid with respect to the petri dish body by rotating the lid in the circumferential direction with respect to the petri dish body in the combined state, An engaged portion connected to the outer surface of the skirt portion and an engaging portion formed on the outer surface of the side wall portion are configured.

In a preferred embodiment, the engaged portion is located below the lower end of the skirt portion.

In a preferred embodiment, the petri dish body is provided with a regulating wall formed at a predetermined interval with respect to the outer surface of the side wall portion, and the skirt portion of the lid has an inner surface of the regulating wall. Rotation beyond a predetermined level is restricted by interfering with.

In a preferred embodiment, the regulating wall has a form of an annular wall that rises from an outward flange formed on the outer surface of the side wall and is concentric with the side wall.

In a preferred embodiment, the petri dish body is provided with an index description piece.

In a preferred embodiment, the lid is formed with a flange portion extending outward or upward.

In a preferred embodiment, the flange portion is provided all or part of the lid, and irregularities are formed on the outer periphery or the end face.

In a preferred embodiment, it further includes a lock mechanism that locks the lid with respect to the petri dish body by rotating the lid in the circumferential direction with respect to the petri dish body in the combined state, An engaged portion formed on the outer surface of the skirt portion and an engaging portion formed on the inner surface of the restriction wall are configured.

In a preferred embodiment, the petri dish body and the lid are both made of resin.

In the petri dish according to the present invention, the lid is tilted and rotated by a predetermined angle only by applying an appropriate force to the peripheral part of the lid with a thumb or the like while being held in one hand, and an appropriate clearance is formed between the lid and the petri dish body. Can be easily created. Therefore, it becomes very easy to perform operations such as injecting a culture medium or a specimen into a petri dish without removing the lid.

Other features and advantages of the present invention will become more apparent from the following description of preferred embodiments with reference to the drawings.

It is a top view of a 1st embodiment of a petri dish concerning the present invention. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which follows the III-III line of FIG. It is a perspective view of a petri dish body. It is a top view of a petri dish body. It is a front view of a petri dish body. It is a side view of a petri dish body. It is a perspective view of a lid. It is a front view of a lid. It is a side view of a lid. It is an operation explanatory view. It is an operation explanatory view. It is an operation explanatory view. It is a top view of a 2nd embodiment of a petri dish concerning the present invention. It is sectional drawing which follows the XV-XV line | wire of FIG. It is sectional drawing which follows the XVI-XVI line of FIG. It is a whole perspective view of the petri dish shown in FIG. It is a top view of a petri dish body. It is an expanded sectional view which follows the XIX-XIX line of FIG. It is an expansion perspective view which shows an engaging part. It is a top view of a lid | cover. It is an expansion perspective view which shows an to-be-engaged part. It is an operation explanatory view. It is an operation explanatory view. It is a whole perspective view of other embodiments of the petri dish concerning the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 to 13 show a first embodiment of a petri dish according to the present invention. The petri dish 100A of the present embodiment has a petri dish body 200 and a lid 300, and both the petri dish body 200 and the lid 300 are formed by resin molding. As the resin, in addition to polystyrene and methylpentene, which are commonly used as medical plastics, resin materials having transparency, such as polyethylene, polyurethane, and polyvinyl chloride, are preferably used, but are not limited thereto.

The petri dish body 200 has a dish shape, and basically includes a circular bottom plate portion 210 and a cylindrical side wall portion 220 that rises from the peripheral portion of the bottom plate portion 210 with a certain height. The lid 300 basically includes a circular top plate portion 310 and a cylindrical skirt portion 320 that hangs down from the peripheral portion of the top plate portion 310 with a certain vertical dimension. The inner diameter of the skirt portion 320 of the lid 300 is set to be larger than the outer diameter of the side wall portion 220 of the petri dish body 200, and the petri dish body 200 and the lid 300 are as shown in FIGS. The skirt part 320 is positioned outside the side wall part 220, and the top plate part 310 is combined in such a manner that the lower surface is placed on the upper end 220 a of the side wall part 220.

2 and 4, the petri dish body 200 is further provided with an outward flange 231 extending from the outer periphery of the lower portion of the side wall 220. Between the outward flange 231 and the lower end 320a of the skirt part 320 of the lid 300 combined with the petri dish body 200, there is a predetermined gap in the vertical direction. Furthermore, in this embodiment, an index description piece 240 that extends outward in a tongue-like shape is formed integrally with a part of the outer periphery of the outward flange 231. The index description piece 240 has a substantially rectangular locking portion 241 that is inclined so as to become lower as it goes outward, and a leg portion 242 that extends downward from the outer edge and both end edges of the locking portion 241. Is provided. A pair of protrusions 241 a are formed on the lower surface of the locking portion 241. These protrusions 241 a are intended to prevent the locked portion 340 from shifting in the circumferential direction of the petri dish body 200 by abutting the periphery of the locked portion 340 of the lid 300 described later. Moreover, although mentioned later for details, the latching | locking part 241 bears a cover holding means. A substantially arc-shaped notch 242a facing downward is formed at an appropriate position of the leg 242. Further, as clearly shown in FIG. 5, a long rectangular gap 250 extending along the tangential direction of the side wall 220 in plan view is formed between the locking portion 241 and the side wall 220. .

As clearly shown in FIGS. 2 and 10, the lid 300 further includes a flange portion 330 extending from the outer periphery of the skirt portion 320 so that the top plate portion 310 extends outward from the peripheral portion thereof. Is formed. The flange portion 330 is inclined so as to be displaced downward as it goes outward (in the radial direction of the top plate portion 310). In this embodiment, the lid 300 further includes a locked portion 340 and a convex portion 350. The locked portions 340 extend outward from the flange portion 330 and are provided at two positions opposite to each other in the diametrical direction across the center of the top plate portion 310. The peripheral edges of these locked portions 340 have a gentle arc shape (see FIG. 8). Although details will be described later, the locked portion 340 serves as a lid holding means. The convex portion 350 is provided near the periphery of the lid 300. In this embodiment, a plurality of convex portions 350 are provided at predetermined intervals along the circumferential direction on the upper surface of the flange portion 330, and three convex portions 350 are arranged corresponding to the formation positions of the locked portions 340.

In addition, in this embodiment, a lock mechanism 400 for locking the petri dish body 200 in a state where the lid 300 is combined is added.

The lock mechanism 400 includes a plurality of engaged portions 410 connected to the outer surface of the skirt portion 320 of the lid 300, and a plurality of engaging portions 420 formed on the outer surface of the side wall portion 220 of the petri dish body 200. In this embodiment, as shown in FIGS. 3 and 9, the plurality of engaged portions 410 are formed at two positions opposed to each other in the diameter direction across the center of the skirt portion 320. The engaged portion 410 and the above-described locked portion 340 are in a positional relationship shifted by 90 ° in the circumferential direction of the skirt portion 320. Further, as shown in FIGS. 3 and 5, the plurality of engaging portions 420 correspond to the plurality of engaged portions 410 and are opposed to each other in the diametrical direction with the center of the side wall portion 220 interposed therebetween. Are formed in two places.

As shown in FIGS. 8 to 10, the plurality of engaged portions 410 are connected to the outer surface of the skirt portion 320 via a box portion 411 protruding outward from the skirt portion 320, and are predetermined in the circumferential direction. It has a plate shape having a length. The box portion 411 includes a pair of upright walls 411a that rises outward from the outer surface of the skirt portion 320, and a peripheral wall 411b that extends along the circumferential direction with a predetermined gap between the skirt portion 320. The engaged portion 410 is connected to the lower ends of the pair of upright walls 411 a to 411 b and is positioned lower than the lower end 320 a of the skirt portion 320. A notch 411c is formed in the lower part of one standing wall 411a and the peripheral wall 411b connected thereto. Accordingly, when the lid 300 combined with the petri dish body 200 is rotated, the engaging portion 420 can enter above the engaged portion 410 through the notch 411c. Note that the upper surface of the engaged portion 410 is not flat but has an engaging recess 410a that is slightly recessed from other portions.

As shown in FIGS. 6 and 7, the plurality of engaging portions 420 have a plate shape protruding from the outer surface near the lower portion of the side wall portion 220 and having a predetermined length in the circumferential direction. In this embodiment, at the center in the circumferential direction of the engaging portion 420, there is an engaging convex portion 420a for fitting the engaging concave portion 410a of the engaged portion 410 to hold the locked state with a sense of moderation. It protrudes downward.

The petri dish 100 A can be rotated in an inclined manner from the state in which the lid 300 is combined with the petri dish body 200. As shown in FIG. 2, this has a predetermined gap between the skirt part 320 and the side wall part 220, and has a predetermined gap between the lower end 320 a of the skirt part 320 and the outward flange 231. Is achieved. That is, as shown in FIG. 11, the skirt portion 320 can tilt while the lower end 320 a is in contact with the outer surface of the side wall portion 220. At this time, the lower surface of the top plate part 310 is in contact with the upper end 220 a of the side wall part 220.

The petri dish 100 A is also configured so that the lid 300 is further prevented from rotating beyond a predetermined inclination state. That is, as described above, the lower end 320a of the skirt portion 320 can be tilted with the outer surface of the side wall portion 220 being in contact, but as the tilting proceeds, the lower end 320a of the skirt portion 320 eventually becomes closer to the outward flange 231. It contacts the corner formed by the side wall 220 (see FIG. 11). At the same time, the lower surface of the top plate portion 310 is in contact with the upper end 220 a of the side wall portion 220. By such two points of contact, the rotation of the lid 300 beyond a predetermined inclination state is restricted, and the position of the lid 300 in the inclination rotation state is determined.

The maximum tilt rotation state of the lid 300 can be set as desired by adjusting the gap between the skirt part 320 and the side wall part 220, the gap between the lower end 320a of the skirt part 320 and the outward flange 231, and the like. When the lid 300 takes the maximum tilt rotation position, between the portion serving as the rotation fulcrum of the lid 300 and the lower end 320a of the skirt portion 320 and the upper end 220a of the side wall portion 220 of the petri dish body 200 on the diametrically opposite side, For example, the lid 300 is adjusted to take the maximum tilt rotation position so that a clearance S sufficient to insert a pipette (not shown) is formed. Further, as shown in FIG. 11, when the lid 300 takes the maximum tilt rotation position, the portion of the flange portion 330 of the lid 300 where the locked portion 340 is located is positioned at the lowest position. The locked portion 340 is positioned below the locking portion 241 of the index describing piece 240. At this time, the locked portion 340 is positioned slightly below the protrusion 241a of the locking portion 241.

The petri dish 100 A further positions the locked portion 340 of the lid 300 in the tilted and pivoted state directly below the locking portion 241 of the index describing piece 240, and returns to the original combined state. 340 engages with the locking portion 241. And as shown in FIG. 12, the lid | cover 300 is hold | maintained in the inclination rotation state. At this time, the locking portion 241 and the flange portion 330 are substantially flush.

Next, a method of using the petri dish 100A having the above configuration will be described.

When the lid 300 is simply combined with the petri dish body 200, the lid 300 may be covered on the petri dish body 200 so that the skirt portion 320 is located outside the side wall portion 220. In this case, depending on the rotational position of the lid 300 in the circumferential direction, the plurality of engaged portions 410 may be placed on the plurality of engaging portions 420, but in this case, the lid 300 is only slightly rotated. The lid 300 falls so that the lower surface of the top plate portion 310 is placed on the upper end 220a of the side wall portion 220, and an appropriate combination state is achieved.

In this combined state, when the lid 300 is rotated in a predetermined direction (clockwise direction in the embodiment shown in the drawing) as necessary, the lower surface of the engaged portion 410 is engaged with the engaging portion 420, and the lid 300 Can be locked. Further, in this locked state, the engaging convex portion 420a of the engaging portion 420 is engaged with the engaging concave portion 410a of the engaged portion 410, so that the locked state is notified with a sense of moderation. Can do. In order to release such a locked state, the lid 300 may be rotated in the opposite direction (in the embodiment shown in the figure, the counterclockwise direction).

In the unlocked state, the petri dish 100A is held with one hand, and the inclined rotation state of the lid 300 as shown in FIG. 11 can be easily obtained by, for example, pushing the edge of the lid 300 downward with the thumb. it can. As described above, since the lid 300 is restricted from rotating further than the predetermined tilt rotation state, when the edge of the lid 300 is pushed down as described above, the force is finely adjusted. It is unnecessary, and a certain tilt rotation state can be obtained by rotating the lid 300 by applying a pressing force of a certain degree or more. Thus, in the petri dish 100A, the lid 300 is tilted and rotated at a constant angle while holding the petri dish 100A with one hand, and a predetermined clearance S is formed between the lid 300 and the petri dish body 200. The medium or specimen can be injected from the gap S by operating the pipette with the other hand. When such injection is finished, the lid 300 can be immediately closed, so that it is possible to prevent as much as possible the situation in which the inside of the petri dish body 200 is contaminated by various germs in the air during the medium injection operation.

In the petri dish 100A shown in the figure, since the flange 300 is formed in the lid 300, the operation of tilting and rotating the lid 300 by pushing the edge of the lid 300 downward as described above can be performed more easily.

In the lid 300, since the convex portion 350 is provided on the upper surface of the flange portion 330, it is easy to perform an operation for switching between the locked state and the unlocked state of the lid 300. For example, by operating with the thumb on the convex portion 350, the petri dish 100 A is held with one hand as described above and the medium or specimen is injected, and then the thumb is hung on the flange portion 330. The operation of rotating and locking the lid 300 in a predetermined direction can be easily performed.

Further, in the present embodiment, the inclined rotation state of the lid 300 can be maintained as necessary. Specifically, first, when the vicinity of the locked portion 340 of the lid 300 is pushed down with, for example, a thumb and the lid 300 takes the maximum tilt rotation position, as described above with reference to FIG. The part 340 is located below the locking part 241 of the index description piece 240. At this time, the locking portion 241 and the locked portion 340 are in a positional relationship slightly shifted in the circumferential direction. Next, the lid 300 in the tilted and rotated state is rotated in the circumferential direction with respect to the petri dish body 200 while being held by a finger, and the locked portion 340 is brought directly below the locking portion 241. Then, when the finger is released from the lid 300, the locked portion 340 is engaged with the lower surface of the locking portion 241, and the lid 300 is held in an inclined rotation state as shown in FIG. That is, in the present embodiment, the lid 300 can be held in an inclined rotation posture with respect to the petri dish body 200 without being pressed with a finger, so that it is possible to work with both hands in this state, and it is easy to use. .

In the lid 300, the convex portion 350 provided on the upper surface of the flange portion 330 is at a position corresponding to the formation position of the locked portion 340. Therefore, the operation of holding the petri dish 100 A with one hand to place the lid 300 in an inclined rotation state and rotating the lid 300 as it is to bring the locked portion 340 directly below the locking portion 241 as described above. This can be easily done by placing a finger on the convex portion 350.

Furthermore, a protrusion 241 a for preventing the locked portion 340 from moving in the circumferential direction of the petri dish body 200 is formed on the lower surface of the locking portion 241. Accordingly, it is possible to appropriately avoid the inconvenience that the locked state of the locked portion 340 by the locking portion 241 is unfairly released. Therefore, the tilt rotation posture of the lid 300 is maintained in a stable state.

In this embodiment, it is possible to obtain the tilt rotation state of the lid 300 as follows. For example, the edge (flange portion 330) of the lid 300 is pushed down with the thumb at a position corresponding to the index description piece 240. Then, the rotation of the lid 300 proceeds while the lower end 320a of the skirt portion 320 is in contact with the outer surface of the side wall portion 220 and the lower surface of the top plate portion 310 is in contact with the upper end 220a of the side wall portion 220. When the flange portion 330 and the locking portion 241 of the index writing piece 240 are substantially flush with each other, the flange portion 330 and the locking portion 241 are simultaneously pressed by the belly of the thumb, and the lid 300 rotates. Stops. At this time, the lower end 320a of the skirt portion 320 is not yet in contact with the corner portion of the outward flange 231 and the side wall portion 220, and the lid 300 has an inclined posture substantially the same as that shown in FIG. Yes. According to such an operation, when the lid 300 takes the inclined posture, the positioning can be achieved quickly, and the usability is good.

When the petri dish 100A is held with one hand and the lid 300 is tilted and rotated, for example, with respect to the petri dish body 200, the lower part of the index description piece 240 is supported using a finger other than the thumb, For 300, the flange 330 is pressed with the thumb as described above. Then, by sandwiching the index description piece 240 and the flange portion 330 with fingers, the tilt rotation operation of the lid 300 can be easily performed. Here, since the leg portion 242 of the index description piece 240 is formed with a notch 242a facing downward, it is easy to attach a finger when supporting the index description piece 240 and it is easy to use.

Furthermore, the flange portion 330 of the lid 300 is inclined so as to be displaced downward toward the outside. For this reason, for example, when the lid 300 is removed from the petri dish body 200 and placed on a plane such as a desk so that the opening side of the lid 300 (the lower end 320a of the skirt portion 320) faces upward, the outer peripheral edge of the flange portion 330 is flat. It will be floating from. Therefore, when lifting the lid 300 placed on the flat surface in this way, the peripheral edge of the flange portion 330 is easily grasped, which is easy to use.

Further, the lid 300 is provided with a box portion 411 that projects outward from the skirt portion 320, and the engaged portion 410 at the lower end of the box portion 411 is positioned below the lower end 320 a of the skirt portion 320. . For this reason, for example, even if the lid 300 is removed from the petri dish body 200 and placed on a flat surface so that the opening side of the lid 300 (the lower end 320a of the skirt portion 320) faces downward, the lower end 320a of the skirt portion 320 remains on the above plane. Separated from each other. Accordingly, even when the lid 300 is placed with the opening side facing downward, the lower end 320a of the skirt portion 320 is not in direct contact with the plane, and foreign matter is appropriately prevented from entering the petri dish body 200. be able to. Moreover, the box part 411 which the to-be-engaged part 410 connects is formed in two places which oppose each other in the diameter direction. For this reason, when lifting the lid 300, it is easy to attach a finger to the box portion 411, which is convenient.

In the case of the petri dish 100 A shown in the figure, by describing the contents information in the petri dish body 200 or the index indicating the test content information in the index description piece 240, for example, when index information is written on the lid 300. Thus, it is possible to prevent a situation in which the lid 300 is mistaken and the contents information in the petri dish body 200 or the test contents information is confused. Since the index description piece 240 has a form extending from the outer periphery of the petri dish body 200, this portion can be used as a handle of the petri dish 100A as a whole. In this case, handling of the petri dish 100A becomes convenient, Furthermore, contamination can be avoided effectively.

In addition, when a plurality of petri dishes 100A are stacked and stored, the index description pieces 240 are positioned at intervals in the vertical direction, so list information on all the index description pieces 240. Can do.

Furthermore, a long rectangular gap 250 is provided between the index description piece 240 and the side wall 220. Thereby, when stacking a plurality of petri dishes 100A, if the circumferential positions of the index writing pieces 240 in the petri dish body 200 are aligned and stacked, for example, as shown in FIG. 13, the holder 500 is placed in the gap 250 of each petri dish 100A. Can be inserted. More specifically, the holder 500 includes a base portion 510 that supports the petri dish body 200 from below, and a column portion 520 that stands substantially perpendicularly from the base portion 510, and the column portion 520 is a gap portion 250. Is inserted. As the column portion 520, for example, a plate-like or rod-like configuration can be adopted. FIG. 13 shows an example in which the column portion 520 is configured in a plate shape, and the holder 500 is made of a plate material having an L-shaped cross section. Although detailed illustration explanation is omitted, when the column portion is configured in a rod shape, the column portion may be configured by two vertical rods passing through the vicinity of both ends of the gap portion 250, for example. If the column portion 520 of the holder 500 is inserted into the gap portion 250 of each petri dish 100A as shown in FIG. 13, the stacked state of the plurality of petri dishes 100A is stabilized, and for example, it is convenient to carry a large number of petri dishes 100A while being stacked. .

14 to 23 show a second embodiment of the petri dish according to the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment, and description thereof will be omitted as appropriate.

The petri dish 100B of the present embodiment has a petri dish body 200 and a lid 300, and both the petri dish body 200 and the lid 300 are formed by resin molding. As the resin, in addition to polystyrene and methylpentene, which are commonly used as medical plastics, resin materials having transparency, such as polyethylene, polyurethane, and polyvinyl chloride, are preferably used, but are not limited thereto.

The petri dish body 200 has a dish shape, and basically includes a circular bottom plate portion 210 and a cylindrical side wall portion 220 that rises from the peripheral portion of the bottom plate portion 210 with a certain height. The lid 300 basically includes a circular top plate portion 310 and a cylindrical skirt portion 320 that hangs down from the peripheral portion of the top plate portion 310 with a certain vertical dimension. The inner diameter of the skirt part 320 of the lid 300 is set to be larger than the outer diameter of the side wall part 220 of the petri dish body 200. As shown in FIGS. 15 and 16, the petri dish body 200 and the lid 300 are The skirt part 320 is positioned outside the side wall part 220, and the top plate part 310 is combined in such a manner that the lower surface is placed on the upper end 220 a of the side wall part 220.

15 and 16, the petri dish body 200 is further provided with a regulating wall 230 formed at a predetermined interval with respect to the outer surface of the side wall part 220. In this embodiment, the regulating wall 230 has a form of an annular wall 232 that rises upward from the outward flange portion 231 at a predetermined height via an outward flange portion 231 that extends from the lower outer periphery of the side wall portion 220. ing. The annular wall 232 is formed concentrically with the side wall portion 220, and an annular clearance 233 larger than the thickness of the skirt portion 320 is formed between the annular wall 232 and the upper end 232 a. It is formed so as to be higher than the lower end 320a of the skirt portion 320 of the lid 300 where the positions are combined. Furthermore, in this embodiment, an index description piece 240 is formed integrally with a part of the outer periphery of the annular wall 232 so as to extend outward in the form of a tongue piece.

The lid 300 is further formed with a flange portion 330 extending from the outer periphery of the skirt portion 320 so that the top plate portion 310 extends outward as it is. Concavities and convexities 331 are formed. In this embodiment, the flange portion 330 is provided with a notch 332 having a predetermined width in the circumferential direction at a position corresponding to the engaged portion 430 constituting the lock mechanism 400 described later.

The lock mechanism 400 includes a plurality of engaged portions 430 formed on the lower outer surface of the skirt portion 320 of the lid 300, and a plurality of engaging portions 440 formed on the inner surface of the annular wall 232 of the petri dish body 200. In this embodiment, as shown in FIG. 21, the plurality of engaged portions 430 are formed at three locations on the outer periphery of the skirt portion 320 every 120 °. As shown in FIG. 18, three portions are formed every 120 ° in correspondence with the plurality of engaged portions 430.

As shown in FIGS. 21 and 22, the plurality of engaged portions 430 have a predetermined width in the circumferential direction of the skirt portion 320, and their upper surfaces engage with the lower surfaces of the plurality of engaging portions 440. An inclined engagement surface 430a is formed. Moreover, in this embodiment, the convex part 441 formed adjacent to the several engaging part 440 so that it may mention later in the vicinity of one to-be-engaged part 430 among the three to-be-engaged parts 430. Engagement projections 431 are formed to engage the vehicle so as to get over and hold the locked state with a sense of moderation.

As shown in FIGS. 19 and 20, the plurality of engaging portions 440 have a plate-like form protruding from the inner surface of the annular wall 232 and having a predetermined width in the circumferential direction. In this embodiment, a convex portion 441 extending in the vertical direction is formed integrally with each engaging portion 440.

The petri dish 100B according to the present invention can rotate in an inclined manner from the state in which the lid 300 is combined with the petri dish body 200. This is because the thickness of the skirt part 320 is annular with the side wall part 220 of the petri dish body 200. This is achieved by being smaller than the annular clearance 233 with the wall 232. That is, the skirt portion 320 can be tilted as shown in FIG. 23 in a state where the skirt portion 320 enters the annular clearance 233.

The petri dish 100B according to the present invention is also configured so that the lid 300 is further prevented from rotating beyond a predetermined inclination state. That is, as described above, the skirt portion 320 can be tilted in a state where the thickness of the skirt portion 320 enters the annular gap 233. As the tilting proceeds, the lower end 320a of the skirt portion 320 eventually contacts the outer surface of the sidewall portion 220. At the same time, the upper outer surface of the skirt portion 320 contacts the upper end 232 a of the annular wall 232. Thereby, rotation beyond the predetermined inclination state of the lid | cover 300 is blocked | prevented (refer FIG. 23).

The maximum tilt rotation state of the lid 300 is to adjust the relationship between the thickness of the skirt portion 320 and the annular clearance 233, the vertical height of the annular wall 232, the amount of the skirt portion 320 entering the annular clearance 233, and the like. Can be adjusted by. However, when the lid 300 takes the maximum tilt rotation position, it is between the lower end 320a of the skirt portion 320 and the upper end 220a of the side wall portion 220 of the petri dish 200 on the diametrically opposite side of the portion serving as the rotation fulcrum of the lid 300. For example, the lid is adjusted to take the maximum tilt rotation position so that a clearance S sufficient to insert a pipette (not shown) is formed.

Next, a method of using the petri dish 100B having the above configuration will be described.

When the lid 300 is simply combined with the petri dish body 200, the lid 300 may be covered on the petri dish body 200 so that the skirt portion 320 is located outside the side wall portion 220. In this case, depending on the rotational position of the lid 300 in the circumferential direction, the plurality of engaged portions 430 may be placed on the plurality of engaging portions 440. In this case, the lid 300 is only slightly rotated. The skirt portion 320 falls into the annular gap 233, and an appropriate combination state is achieved. In the present embodiment, the notch 332 is formed in the flange portion 330, and the circumferential positions of the plurality of engaged portions 430 can be easily confirmed. Therefore, the plurality of engaged portions 430 include the plurality of engaging portions 440. It is easy to select a rotational position of the lid 300 with respect to the petri dish body 200 so as not to be placed on the top, and to obtain an appropriate combination state in which the skirt portion 320 falls into the annular gap 233.

In this state, when the lid 300 is rotated in a predetermined direction (clockwise direction in the embodiment shown in the figure) as necessary, the engaged portion 430 engages with the lower surface 440a of the engaging portion 440, and the lid 300 is engaged. Can be locked. In the embodiment, since the upper surface of the engaged portion 430 is the inclined engaging surface 430a, the inclined engaging surface 430a of the engaged portion 430 slides on the lower surface 440a of the engaging portion 440, thereby the lid 300. A reliable sealed state in which the lower surface of the top plate portion 310 is strongly pressed against the upper surface 220a of the side wall portion 220 of the petri dish body 200 can be obtained. Further, in this locked state, the engaging convex portion 431 is engaged so as to get over the convex portion 441 formed adjacent to any of the engaging portions 440, so that such a locked state is achieved. Can be reported with a sense of moderation. To release such a locked state, the lid 300 may be rotated in the opposite direction (in the embodiment shown in the figure, the counterclockwise direction).

In the unlocked state, the petri dish 100B is held with one hand, and the inclined rotation state of the lid 300 as shown in FIG. 23 can be easily obtained by, for example, pushing the edge of the lid 300 downward with the thumb. it can. As described above, since the lid 300 is restricted from rotating further than the predetermined tilt rotation state, when the edge of the lid 300 is pushed down as described above, the force is finely adjusted. It is unnecessary, and a certain tilt rotation state can be obtained by rotating the lid 300 by applying a pressing force of a certain degree or more. As described above, in the petri dish 100B, the lid 300 is tilted and rotated at a constant angle while holding the petri dish 100B with one hand, and a predetermined clearance S is formed between the lid 300 and the petri dish body 200. The medium or specimen can be injected from the gap S by operating the pipette with the other hand. When such injection is finished, the lid 300 can be immediately closed, so that it is possible to prevent as much as possible the situation in which the inside of the petri dish body 200 is contaminated by various germs in the air during the medium injection operation.

In the petri dish 100B shown in the figure, since the flange 300 is formed on the lid 300, the operation of tilting and rotating the lid 300 by pushing the edge of the lid 300 downward as described above is easier. Yes.

In addition, since the flange portion 330 is formed with irregularities 331 such as knurls, the petri dish 100B is held with one hand as described above, and after performing the operation of injecting the culture medium or the specimen, the thumb is left as it is. It is also possible to easily perform an operation of hooking on the outer periphery of the flange portion 330 and rotating and locking the lid 300 in a predetermined direction.

Further, in the petri dish 100B shown in the figure, since the annular wall 232 is disposed outside the side wall part 220 of the petri dish body 200 via the flange part 231, when the petri dish body 200 is held in the hand, the fingertip is the side wall part. It is less likely to be applied to the upper end of 220, and it is possible to avoid as much as possible that the contents are contaminated by dirt or the like of the operator's hand.

Furthermore, in the case of the petri dish 100B shown in the figure, the index information piece is described on the lid 300 by, for example, describing the content information in the petri dish body 200 or the index indicating the test content information in the index description piece 240. As in the case, it is possible to prevent a situation in which the content information in the petri dish body 200 or the test content information is confused by displacing the lid 300. Since the index description piece 240 has a form extending from the outer periphery of the petri dish body 200, this portion can be used as a handle of the whole petri dish 100B. In this case, handling of the petri dish 100B becomes convenient, Furthermore, contamination can be avoided effectively.

Furthermore, when a plurality of petri dishes 100B are stacked and stored, the index description pieces 240 are positioned at intervals in the vertical direction, so list information on all the index description pieces 240. Can do.

Of course, the scope of the present invention is not limited to the embodiments shown in the drawings, and all modifications within the scope of the matters described in the claims are all included in the scope of the present invention.

In the first and second embodiments described above, the skirt portion 320 of the lid 300 is brought into contact with a suitable place (the corner formed by the outward flange 231 and the side wall portion 220 or the regulating wall 230) of the petri dish body 200, whereby the petri dish Although it is restricted that the lid 300 is further rotated over a predetermined inclination with respect to the main body 200, the present invention is not limited to this configuration. It is only necessary that the further rotation of the lid 300 is restricted with a predetermined tilt rotation state. For example, the flange portion 330 of the lid 300 may be in contact with the outward flange 231 of the petri dish body 200 or a portion integral therewith, so that the rotation of the lid 300 more than a predetermined amount may be restricted. In the case of the type of the first embodiment, for example, when the flange portion 330 of the lid 300 is further extended outward and the outward flange 231 is further extended outward, the inclination of the lid 300 causes the flange portion 330 to move. The edge abuts on the outward flange 231 and further rotation of the lid 300 is restricted. In the case of the first embodiment, when the index describing piece 240 integrated with the outward flange 231 is brought close to the side wall portion 220, the flange portion 330 comes into contact with the upper surface of the index describing piece 240 by the tilting rotation of the lid 300. Further rotation of the lid 300 is restricted. Further, in the case of the type of the second embodiment, for example, as shown in FIG. 24, the flange portion 330 of the lid 300 is further extended outward and the restriction wall 230 formed integrally with the outward flange 231 is moved upward. When the cover 300 is further extended, the lower surface of the flange portion 330 comes into contact with the upper end 232a of the regulating wall 230 (annular wall 232) by the tilting rotation of the lid 300, and further rotation of the lid 300 is restricted.

In the first embodiment, the locking portion 241 that is a component of the lid holding means constitutes the main part of the index description piece 240 and also serves as the index description piece 240. However, the locking portion is separate from the index description piece. It may be provided. Further, the locked portion 340 of the lid 300 may also be provided at a site different from the flange portion 330.

For example, the flange portion 330 provided on the lid 300 may be provided on the entire circumference in addition to the notch 332 as in the second embodiment. Further, as shown in FIG. 25, the flange portion 330 may extend in a cylindrical shape upward from the upper surface of the lid 300. Even in this case, it is preferable to provide the unevenness 331 on the upper end of the flange portion 330. In this case, when the lid 300 is tilted and rotated, a finger is put on the flange portion 330 and the skirt portion 320 is tilted outward. The point that the further rotation of the lid 300 is restricted while the lid 300 is in a certain tilt rotation state is the same as described above.

Regarding the locking mechanism 400, in the second embodiment, the upper surface of the engaged portion 430 is the inclined engaging surface 430a, but the lower surface 440a of the engaging portion 440 provided on the inner surface of the annular wall 232 may be an inclined surface. . Further, whether or not the inclined surface is provided in the engaging portion 440 and the engaged portion 430 is an optional matter.

Further, in the second embodiment, the restriction wall 230 for restricting the amount of tilting rotation of the lid 300 is an annular wall 232 that surrounds the entire circumference of the side wall part 220. Of course, it may be formed so as to rise through the gap 233 with respect to the partial region.

Claims

A petri dish body having a bottom plate portion and a side wall portion rising from a peripheral portion of the bottom plate portion; and a lid having a top plate portion and a skirt portion depending from the peripheral portion of the top plate portion. Is a petri dish that is combined so that the skirt part is located outside the side wall part,
The petri dish characterized in that the lid can be rotated in an inclined manner with respect to the petri dish body from the combined state, and the rotation more than a predetermined value is restricted.
The petri dish according to claim 1, wherein the side wall part of the petri dish body and the skirt part of the lid are cylindrical.
The side wall portion of the petri dish body has an outward flange formed on the entire circumference or part of the lower portion thereof, and the lid is in a state where the lower surface of the top plate portion is in contact with the upper end of the side wall portion, The petri dish according to claim 1 or 2, wherein the lower end of the skirt portion is in contact with a corner portion formed by the outward flange and the side wall portion, whereby rotation of a predetermined amount or more is restricted.
The petri dish according to claim 3, further comprising lid holding means for holding the lid in a predetermined inclined posture rotated with respect to the petri dish body.
The lid holding means includes an engaging portion provided to be supported by the outward flange on the outside of the side wall portion of the petri dish body, and a cover provided to extend outward of the skirt portion of the lid. It is composed of a locking part,
The lid is rotated in the circumferential direction with respect to the petri dish body in a state of being rotated with respect to the petri dish body, and the locked portion is locked to the locking portion, whereby the predetermined inclined posture is obtained. The petri dish according to claim 4, which is held by
The petri dish according to claim 5, wherein the locking part is formed with a protrusion for restricting the locked part locked thereto so as not to move in the circumferential direction of the petri dish body.
The petri dish according to claim 5 or 6, wherein a convex portion is provided on an upper surface of the lid in correspondence with a formation position of the locked portion in a circumferential direction of the lid.
The petri dish according to any one of claims 5 to 7, wherein the petri dish body is provided with an index description piece that also serves as the locking portion.
The petri dish according to claim 8, wherein a gap having a predetermined shape is formed between the index writing piece and the side wall portion in a plan view.
6. The lid is formed with a flange portion extending outward from a peripheral portion of the top plate portion, and the locked portion is formed to further protrude from the flange portion. The petri dish according to any one of 9.
The petri dish according to claim 10, wherein the flange portion has an inclined shape that is displaced downward as it goes outward.
A lock mechanism that locks the lid with respect to the petri dish body by rotating the lid with respect to the petri dish body in the circumferential direction in the combined state;
The said lock mechanism is comprised including the to-be-engaged part connected to the outer surface of the said skirt part, and the engaging part formed in the outer surface of the said side wall part. Petri dish.
The petri dish according to claim 12, wherein the engaged portion is located below the lower end of the skirt portion.
The petri dish body is provided with a regulating wall formed at a predetermined interval with respect to the outer surface of the side wall portion, and the lid has its skirt portion that interferes with the inner surface of the regulating wall, The petri dish according to claim 2, wherein rotation beyond a predetermined value is restricted.
The petri dish according to claim 14, wherein the restriction wall rises from an outward flange formed on an outer surface of the side wall portion and has a form of an annular wall concentric with the side wall portion.
The petri dish according to claim 14 or 15, wherein the petri dish body is provided with an index writing piece.
The petri dish according to any one of claims 14 to 16, wherein the lid is formed with a flange portion extending outward or upward.
The petri dish according to claim 17, wherein the flange portion is provided on the entire circumference or a part of the lid, and the outer circumference or the end face is formed with irregularities.
A lock mechanism that locks the lid with respect to the petri dish body by rotating the lid with respect to the petri dish body in the circumferential direction in the combined state;
The lock mechanism according to any one of claims 14 to 18, wherein the lock mechanism includes an engaged portion formed on an outer surface of the skirt portion and an engaging portion formed on an inner surface of the restriction wall. Petri dish of mention.
The petri dish according to any one of claims 1 to 19, wherein the petri dish body and the lid are both formed of resin.