JPS641041B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides an engaging tool using a permanent magnet, particularly,
The present invention relates to the disclosure of a mounting structure for a mounting washer in the fastener.

Therefore, in the conventional engagement tool of this type, the mounting washer was attached by caulking, and the protrusion of this caulked part caused the connection between the engagement tool and the washer. The problem is that the attachment material (bag, belt, etc.) to which the engagement tool is attached has poor adhesion and lacks stability to the surface of the mounting material.

In addition, in the past, when caulking was performed at one location, there was a risk that the mounting washer would rotate around the caulked portion due to long-term use.

The present invention has been specially devised in view of the inconveniences in the prior art, and one of the main objects of the present invention is to easily and quickly stop the mounting washer on the engagement tool. It is designed so that it can be worn.

In addition, in the present invention, the thickness of the crushed portion caulked to the ferromagnetic plate is wrapped around the thickness of the mounting washer, and the surface that comes into contact with the material to be attached (bag, belt, etc.) is made flat. , the attachment of the engagement tool is stabilized.

Therefore, the present invention provides a permanent magnet in which the hole 1a is opened from one magnetic pole surface to the other magnetic pole surface in order to achieve appropriate and purposeful effects on such characteristics. A ferromagnetic plate 2 is attached and attached to one of the magnetic pole faces, and another ferromagnetic plate 3 is attached and detachably abutted to the other magnetic pole face, and the plates 2 and 3 are attached through the hole 1a. Ferromagnetic protrusion 2 protruding from both or one side
In a structure in which the plates a and 3a are brought into contact with the other plates 2 and 3 or the protrusions 2a and 3a in a magnetically detachable manner, a U-shape is formed on the non-adsorbing end surface of the plates 2 and 3 or either one. In addition, a mounting washer with a caulking hole 4a in the U-shaped bottom is integrally welded, and considerable design changes are planned in accordance with the gist of this configuration. .

Hereinafter, details of the present invention will be described with reference to a typical embodiment shown in the drawings. Reference numeral 1 denotes a cylindrical permanent magnet made of ferrite or the like with a hole 1a opened from one magnetic pole surface to the other magnetic pole surface. A ferromagnetic plate 2 having the same diameter as a disk is attached to one magnetic pole surface of the magnet 1, and the peripheral edge of the case 5 that covers and fits the attracting end surface and the peripheral surface of the magnet 1 is bent. The plate 2 is fixedly attached to the magnet 1, and the ferromagnetic plate 3 is brought into contact with the other magnetic pole surface of the magnet 1 so as to be able to be attached and detached. Magnet hole 1a
a protrusion 2a protruding so that it can be magnetically attached and detached within;
3a is caulked to plates 2 and 3.
In such a configuration, spot welding is performed on the non-adhesive surfaces of the plates 2 and 3 so that the crushed portion of the U-shaped mounting washer 4 is located in the hole 4a formed at the bottom of the hole 4a. It was designed to encourage them.

Further, in FIG. 2, a protrusion 3a is provided only on the ferromagnetic plate 3, so that the protrusion 3a is directly magnetically attached to the ferromagnetic plate 2.

In FIG. 3, a protrusion 2a is made to stand up on the attracting surface side of a ferromagnetic plate 2 attached to a magnet 1, and the tip of the protrusion 2a directly contacts the ferromagnetic plate 3. The peripheral edge of the plate 3 has a drooping bent edge so as to fit the upper end of the magnet 1, and can effectively prevent lateral displacement.

In FIG. 4, the upper circumferential edge of the case 5 is formed into a circumferential rising portion 5a, so that the plate 3 can be fitted therein, and the plate 3 can be prevented from shifting laterally. Magnet 1 for magnetic recording cards such as
This prevents damage to the magnetic recording on the card. Also, by attaching the shield plate 6 to the attracting end surface of the magnet 1,
This prevents magnetic leakage.

In FIG. 5, the periphery of the upper surface of the shield plate attached to the attracting end surface of the magnet 1 is formed into a recessed step 6b, and the upper periphery of the case 5 is fixed by bending, and the upper surface of the shield plate 6 is made smooth. It is made to have a flat surface and can prevent magnetic leakage.

In FIGS. 6 and 7, the case 5 is omitted to simplify manufacturing and reduce costs.

As mentioned above, the present invention significantly improves productivity by welding the mounting washer 4 to the non-adhesive surfaces of the ferromagnetic plates 2 and 3 of the engagement tool.

Furthermore, the present invention reliably prevents the mounting washer from wobbling and rotating due to long-term use as in the prior art.

Furthermore, the present invention makes the engaging tool more flexible by making the crushed portions of the non-adhering surfaces of the protrusions 2a and 3a caulked to the ferromagnetic plates 2 and 3 as thick as the mounting washer 4. Material to be attached (bugs, belts, etc.)
It was designed to be able to adhere closely to the surface, eliminate wobbling, and have stability.

As described above, an object of the present invention is to provide an engaging tool which has a simple structure and is expected to significantly improve productivity.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a typical embodiment of the invention, FIGS. 2 to 7 are sectional views showing other embodiments of the invention, and FIG. 8 is a typical embodiment of the invention. FIG. 9 is a perspective view showing another embodiment of the present invention, and FIG. 10 is a perspective view showing a typical embodiment of the present invention. In the figure, 1... permanent magnet, 2, 3... ferromagnetic plate, 4... mounting washer, 5... case, 6... shield plate are shown.

Claims (1)

[Claims] 1 Hole 1 from one magnetic pole face to the other magnetic pole face
A ferromagnetic plate 2 is attached and attached to one magnetic pole face of a permanent magnet having a hole a, and another ferromagnetic plate 3 is attached and detachably abutted to the other magnetic pole face, and is inserted through the hole 1a. The ferromagnetic protrusions 2a, 3a protruding from both or one of the plates 2, 3 are connected to the other plate 2, 3 or the protrusion 2.
In the configuration in which the plates 2, 3 or any one of the plates 2, 3 has a U-shaped non-adsorbing end surface, and a caulking hole 4a is provided at the bottom of the U-shape. An engagement tool characterized in that a mounting washer that has been opened is integrally welded.