JPS6243028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engagement tool that utilizes the magnetic force of a permanent magnet, and particularly to a structure for fixing one of the engagement tools.

Therefore, in the past, this type of engagement tool generally utilized a washer having a leg piece, but such a washer structure required a large number of parts to be attached and was difficult to manufacture. This requires a lot of effort and relatively increases the product cost.

In addition, it is difficult to attach decorations such as decorative buttons to the mounting surface of washers whose main parts are bent leg pieces, and more labor and materials are required to attach decorations. This is what I did.

Next, in the conventional leg structure, a relatively large number of end faces are required to be bent and locked, and this is not necessarily good in terms of appearance, especially when another piece of leather, etc. is not attached to the mounting base. This exposes its difficulties.

The present invention has been devised especially in view of the inconveniences of the conventional engaging devices, and is a bottomed tube-shaped mounting structure whose distal end is expected to be crushed and expanded in contrast to the conventional leg structure. In addition to lowering the product cost by reducing the number of parts and installation time, the mounting end face is made relatively simple, which significantly improves the external appearance.Furthermore, the remaining processing liquid during the plating process of the fixture oozes out onto the magnetic surface. This prevents this from happening and makes it possible to attach decorations, especially decorative buttons, etc., with a single touch, if necessary.

The details of the present invention will be described below with reference to a typical embodiment shown in the drawings. As shown in FIGS. 8 to 13, a general fastener using a permanent magnet 1, particularly a permanent magnet 1 A hole 1a is provided that is opened from one magnetic pole surface toward the other magnetic pole surface, or is opened by installing a plurality of magnets 1, and a ferromagnetic plate 2 is provided on one magnetic pole surface of this magnet 1. A case 3 made of a non-magnetic material is fixed or directly bonded to form an integral body, and then the surface of the hole 1a of the magnet 1 in the ferromagnetic plate 2 is aligned as shown in FIG. The ferromagnetic rod 4 can be completely exposed as shown in FIG. and fix the ferromagnetic rod 4 integrally to the ferromagnetic plate 2, and as shown in FIG.
The magnet 1 reaches the upper edge of the magnet 1, that is, including the case 3.
The ferromagnetic rod is erected on the ferromagnetic plate 2 so that when another ferromagnetic plate 5 is brought into contact with the magnetic pole surface of the ferromagnetic rod, the four ends of the ferromagnetic rod can contact and be magnetically attached to the ferromagnetic plate 5 surface. In either case, special care has been taken to prevent the ferromagnetic rod 4 from coming into contact with the inner circumferential wall surface of the hole 1a of the magnet 1.

The permanent magnet 1 is available in various shapes and materials, and in terms of structure, it can be used with a structure having a separate magnetic shield plate 6 as shown in FIGS. 11 and 12. Mounting leg piece 7
When installing the washer 7 having a to 7a, it is planned that the ferromagnetic plate 2 will be attached to the ferromagnetic plate 2 by gluing, welding, waxing or caulking, and the case 3 will be held together with the ferromagnetic plate 2 using a walnut. It is what was done.

The present invention is based on such a permanent magnet 1, and relates to the disclosure of a unique mounting structure for the base plate 8 of the ferromagnetic plate 5, which is magnetically and removably brought into contact with the free end face of the magnet 1. First, as shown in FIGS. 1 to 7, a substantially central portion of the mounting plate 9 is squeezed out laterally to form a bottomed tubular portion 9a, and a portion above the opening of the tubular portion 9a of the mounting plate 9 is squeezed out laterally. The periphery of the flat plate 10 attached to cover the mounting plate 9 is folded back to the periphery of the mounting plate 9 as the edge 10a.
It is intended to be integrated with 0.

In contrast to the flat plate 10 having such a configuration, the ferromagnetic plate 5
The flat plate 10 and the ferromagnetic plate 5 are fixed on the back side of the surface that is attracted to the permanent magnet 1, and as mentioned above, various kinds of materials such as waxing, caulking, etc. Welding, bolting, screwing, press-fitting with pins, and other various methods are contemplated.

Therefore, this ferromagnetic plate 5 corresponds to the structure such as the permanent magnet 1 that comes into contact with it, that is, the long ferromagnetic plate 5 directly contacts the ferromagnetic plate 2 of the permanent magnet 1. In the case where the ferromagnetic rod 11 is protruded from the contact end surface with the magnet 1, and in the case where the ferromagnetic rod 11 extends to the middle of the hole 1a of the magnet 1 as shown in FIGS. 1 to 3 and FIGS. 5 to 7. In the case where a ferromagnetic rod 11 with a length dimension of
When the size of the hole 1a reaches to the upper edge of the hole 1a as shown in FIG. 9, as shown in FIG. There is no need to provide this, and the abutting end surface is simply a smooth surface, and the periphery of the ferromagnetic plate 5 is made to stand up in the direction of the abutting end surface with the magnet 1, forming a periphery flange 5a.

It should be noted that various methods of attaching the ferromagnetic rod 11 to the ferromagnetic plate 5 are planned, and the methods shown in FIGS. Other mounting structures are planned, including one in which the mounting plate 9 and the flat plate 10 are caulked together as shown in FIG. 2, one in which the mounting plate is screwed as shown in FIG.

Next, in the specific installation via the base plate 8, the base plate 8 is attached to the tubular portion 9a of the mounting plate 9, which is inserted through the base plate 8 without using any other intervening material such as a washer. A case in which the base plate 8 and the ferromagnetic plate 5 are fixed together by crushing the protruding end of the strand, and a case in which the tubular portion 9a is crushed and fixed via a washer 12 as shown in FIG. Furthermore, as shown in FIGS. 5 and 6, the most typical case of the present invention, that is, the case of using a receiver 13 having a protruding funnel-shaped female pipe portion 13a, is planned. be.

The receiver 13 has a female pipe portion 13a whose diameter is gradually reduced.
3 is attached, and the tubular part 9a of the mounting plate 9 is press-fitted into the female pipe part 13a from the other end of the base plate 8, so that the tip of the tubular part 9a is sequentially expanded to form a female pipe part. It is press-fitted to the inner circumferential wall of 13a.

In addition, in the case where the decorative button 14 is previously provided integrally with the receiver 13, as illustrated in FIG. By attaching the general ferromagnetic plate 5, it is possible to securely attach the decorative button 14.

The present invention has the above-described characteristic structure that makes it extremely easy to attach the ferromagnetic plate 5 to the base plate 8.
In other words, it is possible by simple press-fitting or press-fitting crushing,
The number of parts for installation is reduced as much as possible, and the appearance after installation is extremely good.

That is, the flat plate 10 is wrapped around the mounting plate 9 and integrated, and the ferromagnetic plate 5 is fixedly integrated with the mounting plate 9, which significantly reduces the cost of assembling these parts. .
Furthermore, since the periphery of the flat plate 10 attached to cover the opening of the tubular portion 9a of the mounting plate 9 is turned over to the periphery of the mounting plate 9, the remaining processing liquid during the plating process of the fixture is not magnetically attached. It does not bleed onto the surface.

In addition, the base plate 8 can be reliably attached to the base plate 8 by an extremely simple operation such as press-fitting and crushing the washer 12 or the receiver 13, and at the same time, the cost of attaching the base plate 8 to the base plate 8 can be reduced. It is something.

In particular, in such a simple press-fit fastening method, there is no need for subsequent bonding of the press-fit end, especially caulking, bending, etc., and the use of the decorative button 14 is completely possible. be.

In addition, the structure that was held at two or more fulcrums as in the conventional example has been changed to the tubular part 9a and the female pipe part 13a.
By making the ferromagnetic plate 5 a single fulcrum, a certain swing width is given to the ferromagnetic plate 5, and with this swing width, it is possible to maintain a more stable magnetic state with the permanent magnet 1. It is what was done.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a typical embodiment of the present invention, Figs. 2 to 4 are sectional views showing other embodiments, and Figs. 5 to 7 are sectional views showing various installation states. , and FIGS. 8 to 13 are cross-sectional views showing various examples of engagement partners. In addition, in the figure 1... permanent magnet, 2... ferromagnetic plate, 3
...Case, 4...Ferromagnetic rod, 5...Ferromagnetic plate,
6...Magnetic shield plate, 7...Mounting leg piece, 8...
Base plate, 9... Mounting plate, 10... Flat plate, 11... Ferromagnetic rod, 12... Washer, 13... Receiver, 14...
This shows a decorative button.

Claims (1)

[Claims] 1 Hole 1 from one magnetic pole face to the other magnetic pole face
A ferromagnetic plate 2 attached to one magnetic pole surface of an annular plate-shaped permanent magnet 1 having an opening a, and a ferromagnetic plate 5 detachably attracted to the other magnetic pole surface are attached to the permanent magnet 1.
The bottomed tubular part 9 is squeezed out approximately in the center of the engaging tool which is brought into contact with the engaging tool through the hole 1a so as to be able to be adsorbed and removed.
The periphery of the flat plate 10 attached to cover the opening of the apertured tubular portion 9a of the mounting plate 9, which is a, is turned over and integrated with the periphery of the mounting plate 9. , the flat plate 10 is fixedly attached to the surface of the ferromagnetic plate 5 that is not attracted to the permanent magnet 1, and is inserted through a hole made separately in the base plate 8. The tubular portion 9a is the base plate 8.
An engagement tool characterized by being caulked to.