JPH0229681Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a lid used for cans, pipes, etc. made of a magnetic material such as iron.

(b) Prior art Conventionally, lids for cans, pipes, etc. made of magnetic materials such as iron have had a convex bent portion inserted into the concave bent portion, or a cylindrical portion around the lid. There were some types of cans, pipes, etc., but the former required an auxiliary tool to open the lid because it had a built-in lid, and the latter required stability and airtightness. Because the cylindrical part of the lid is made longer to improve durability, it takes time to open the lid, and it takes even more time to open the lid if an inner lid is provided. Moreover, the lids were made specifically for a specific size and were not interchangeable.

(c) Purpose of the invention This invention solves the inconvenience of opening and closing the conventional lid.
By using a permanent magnet, an attempt is made to provide a lid that is easy to open and close and is compatible, by using a permanent magnet.

(d) Structure of the invention The present invention is a magnetic adsorption lid characterized in that a permanent magnet is adhesively fixed to the lower surface of the upper lid made of a magnetic material, and an inner lid made of a magnetic material is adhesively fixed to the permanent magnet.

(e) Examples The configuration of the present invention will be explained with reference to the drawings.
FIG. 1 is a sectional view of a main part showing a state in which a magnetic suction cup according to a first embodiment of the present invention is closed on a pipe made of a magnetic material such as iron. In the figure, 1 is a top cover made of a magnetic material such as iron. Its shape is round,
It can be of any shape, such as a square shape. The lower surface 2 of this upper lid 1
A permanent magnet 3 is adhesively fixed near the center by any method. The permanent magnet 3 may be any magnet such as a ferrite magnet, and may have any shape such as a round shape or a square shape. This permanent magnet 3 is magnetized so that if the upper part has N polarity, the lower part has S polarity, and conversely, if the upper part has S polarity, the lower part has N polarity, so that the upper and lower parts have different polarities. An inner lid 4 made of a magnetic material such as iron is adhesively fixed to the permanent magnet 3 by any method. The shape of this inner lid 4 may be round, square, etc., depending on the shape of the target can.
The shape should be similar to the inside shape of a pipe, etc.

Assume that the upper part of the permanent magnet 3 has N polarity and the lower part has S polarity. The upper lid 1 and the inner lid 4 become magnetic pole pieces due to the action of the permanent magnet 3, and the upper lid 1 has N polarity and the inner lid 4 has S polarity, so the upper lid 1, the permanent magnet 3, and the inner lid 4,
This will constitute a magnetic circuit.

Since the magnetic suction cup of the present invention has the above-described structure, when the pipe 6 is closed, the lower surface 2 of the upper cover 1 is brought into contact with the upper end 7 of the pipe 6. The S-polarity magnetic flux of the inner lid 4 comes out from the side surface 5, passes through the inner wall of the pipe 6 facing the side surface 5, and reaches the upper end 7 of the pipe 6. Therefore, the inner wall of the pipe 6 facing the side surface 5 has N polarity, and the upper end 7 of the pipe 6 has S polarity. Since the top cover 1 has N polarity, the top cover 1
The lower surface 2 of the pipe 6 and the upper end 7 of the pipe 6 are attracted to each other by the attraction force of the different polarities. Due to this attraction force, the pipe 6 is closed with the magnetic adsorption lid of the present invention. Even when the upper part of the permanent magnet 3 is magnetized with S polarity and the lower part with N polarity, the same effect as described above can be obtained.
Therefore, the magnetic adsorption lid of the present invention can be closed by magnetic action simply by touching the end of the pipe 6, etc., without requiring strong force or effort, and the lid can be closed even when the lid is opened. The lid can be opened easily without the need for any auxiliary tools.

Further, it can be used for a wide variety of pipes, cans, etc., which have an outer diameter greater than or equal to the outer diameter of the inner lid 4 and less than the outer diameter of the upper lid 1.

FIG. 2 is a sectional view of a main part showing a state in which a magnetic attraction lid according to a second embodiment of the present invention is closed on a pipe 6 made of a magnetic material such as iron. In this embodiment, the periphery of the top lid 1 is bent upward and the grip portion 8 is provided, so that the magnetic attraction lid of the present invention can be easily held when opening and closing. Further, the upper lid 1 may be provided with another handle or the like. It should be noted that the configuration of other parts is the same as that of the first embodiment, so the same reference numerals as those of the first embodiment are used in the drawings, and the explanation thereof will be omitted.

FIG. 3 is a sectional view of a main part showing a state in which a magnetic attraction lid according to a third embodiment of the present invention is closed on a pipe 6 made of a magnetic material such as iron. In this embodiment, the periphery of the inner lid 4 of the second embodiment is bent downward to provide a bent portion 9. By increasing the area of the side surface 5 of this bent portion 9, magnetic resistance can be reduced and the action of magnetic force can be strengthened. Therefore, the longer the bent portion 9 extends downward, the better the result will be.

The configuration of other parts is the same as that of the second embodiment, so the same reference numerals are used in the drawings and the explanation thereof will be omitted.

FIG. 4 is a sectional view of a main part showing a state in which a magnetic attraction lid according to a fourth embodiment of the present invention is closed on a pipe 6 made of a magnetic material such as iron. In this embodiment, a packing 10 made of rubber or the like is adhesively fixed to the lower surface 2 of the upper lid 1 of the third embodiment by an arbitrary method. With this packing 10, the pipe 6
It is possible to improve the adhesion between the upper end 7 and the lower surface 2 of the upper lid 1, and provide a lid with good sealing performance. Note that the configuration of other parts is the same as that of the third embodiment, so
The same reference numerals are used in the drawings and explanations are omitted.

FIG. 5 is a sectional view of a main part showing a state in which a magnetic attraction lid according to a fifth embodiment of the present invention is closed on a pipe 6 made of a magnetic material such as iron. In this embodiment, a packing 11 made of rubber or the like is provided on the bent portion 9 of the inner lid 4 of the fourth embodiment. As a result, the inner cover 4 and the pipe 6 are brought into close contact with each other, and the inner cover 4 and the upper cover 1 are
This makes it possible to provide a highly airtight magnetic adsorption lid.

Further, even in an embodiment in which the bent portion 9 is not provided on the inner lid 4, the packing 11 can be similarly provided on the inner lid 4, and the same effect can be achieved.

FIG. 6 is a perspective view of a magnetic attraction lid and a can used to hold wax, etc., according to another embodiment of the present invention. By forming the inner lid 4 in the shape shown in the figure, the magnetic adsorption lid of the present invention can be used even for cans, etc., in which the inner diameter of the can opening is smaller than the outer diameter of the main body. The other configurations can be the same as those of the first to fifth embodiments.

(f) Effects of the invention This invention provides a lid with a permanent magnet and an inner lid, which makes it possible to easily close the lid using the attraction force of the magnet. It was possible to provide a lid with good adhesion and sealing performance without requiring any auxiliary tools.

The magnetic adsorption lids of the first to fourth embodiments can be used for many types of cans, pipes, etc. that have an outer diameter greater than or equal to the outer diameter of the inner lid and less than the outer diameter of the top lid. be able to. Further, by using the magnetic adsorption lids of the fourth and fifth embodiments, it can be used as a highly airtight lid.

Furthermore, if the magnetic adsorption lid of the present invention is used as a lid to prevent dust from entering when preserving industrial iron pipes, etc., the man-hours required for inserting and removing conventional wooden plugs, etc., will be reduced and simplified. be done. Furthermore, compared to a lid having a cylindrical portion, the number of manufacturing steps is reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing a first embodiment of the present invention. FIG. 2 is a sectional view of main parts showing a second embodiment of the present invention. FIG. 3 is a sectional view of main parts showing a third embodiment of the present invention. FIG. 4 is a sectional view of main parts showing a fourth embodiment of the present invention. FIG. 5 is a sectional view of main parts showing a fifth embodiment of the present invention. FIG. 6 is a perspective view of the magnetic adsorption lid of the present invention about to be closed on a can. 1 is the upper lid, 2 is the lower surface, 3 is the permanent magnet, 4 is the inner lid, 5 is the side surface, 6 is the pipe, 7 is the upper end, 8 is the grip portion, 9 is the bent portion, 10 is the packing, 11 is the packing, 12 A can.

Claims (1)

[Claims for Utility Model Registration] 1. A magnetic adsorption lid characterized in that a permanent magnet is adhesively fixed to the lower surface of an upper lid made of a magnetic material, and an inner lid made of a magnetic material is adhesively fixed to the permanent magnet. 2. The magnetic adsorption lid according to claim 1 of the utility model registration claim, wherein the upper lid made of a magnetic material is bent around the periphery and provided with a grip. 3 Utility model registration claim paragraph 1 or 2 in which the periphery of the inner lid made of magnetic material is bent downward
Magnetic adsorption lid as described in section. 4. The magnetic adsorption lid according to any one of claims 1 to 3 of the utility model registration claims, in which a permanent magnet and packing made of rubber or the like are adhesively fixed to the lower surface of the top lid made of a magnetic material. 5. The magnetic adsorption lid according to any one of claims 1 to 4 of the utility model registration claim, wherein the inner lid made of a magnetic material is provided with packing.