JPS6245382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engagement tool used for a lid plate of a handbag, etc., which utilizes the magnetic attraction force of a permanent magnet, and particularly to a mounting structure for a permanent magnet member.

Therefore, in the past, this type of engagement tool generally utilized a washer having a leg piece, but in such a washer structure, the number of parts to be attached increases, and it is difficult to attach them at the same time. This requires a large amount of manufacturing time 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 the decorations. It is something.

Next, in such a conventional leg structure, a relatively large number of end faces are required to be bent and locked, and this does not necessarily give a good appearance, especially when another piece of leather, etc. is not attached to the mounting base plate. 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. , the product cost is reduced by reducing the number of parts and installation effort, and the installation end face is made relatively simple, significantly improving the external appearance, and decorations, especially decorative buttons, etc., can be installed with one touch as required. That is.

The details of the present invention will be described below with reference to typical embodiments shown in the drawings. In FIG. 1, reference numeral 1 represents a permanent magnet, and various magnets may be used without being limited to its material or shape. In addition, the engaging hole 1a is opened as a single component or multiple components from one magnetic pole end face to the other magnetic pole end face, and a ferromagnetic plate 2 is arranged on the magnetic pole face corresponding to the bottom surface to be used, This plate 2 and magnet 1 are integrally fixed with a case 3 made of a non-magnetic material such as a brass plate.

Therefore, the case 3 is generally fitted so as to cover the fixed end surface of the plate 2 and the circumferential surface of the hole 1a except for the opening, and the case 3 is bent so as to bend the end surface toward the hole 1a. Similarly, the locking piece 3a on the edge of the opening is bent on the end surface that does not come into contact with the permanent magnet 1.

Regarding the structure of such magnet 1 and ferromagnetic plate 2,
Separately prepare a mounting plate 4 whose approximately central portion is bulged out by drawing or the like to form a bottomed tube portion 4a, and the peripheral edge of this mounting plate 4 is bent to form an edge 4b that is similar to the previous plate 2. A plate 4 and a plate 2 are fixed together by bending the joint surface of the permanent magnet 1, and this is integrated with the magnet 1 with a case 3.

Next, an intervening gap is provided between the bent edge 4b of the mounting plate 4, and a circumferential recessed step edge corresponding to the thickness of the bent edge 4b is formed along the outer periphery of the plate 2 to ensure close contact between the magnet 1 and the plate 2. It has been established.

In addition, a ferromagnetic rod 6 erected on a ferromagnetic plate 5 as shown in FIG. It is designed to be attracted onto two surfaces of a ferromagnetic plate.

In FIG. 2, a rod 7 with a length reaching approximately the middle of the hole 1a of the permanent magnet 1 is installed upright, and is placed in close contact with the rod 6 in the hole 1a in the middle of the hole 1a in FIG. This is an example of how it has become.

In FIG. 3, the ferromagnetic rod 7 is provided at a position where it contacts the ferromagnetic plate 5 of the permanent magnet 1 including the case 3, that is, the ferromagnetic rod 7 faces the end of the hole 1a. The ferromagnetic plate 5 having such a peripheral engagement flange 5a is brought into close contact with and attracted to the plate.

Figure 4 shows a ferromagnetic magnetic shield plate 5 on the surface of the permanent magnet 1 that is not attached to the ferromagnetic plate 2.
are attached and held together in a cylindrical case 3 to prevent magnetic leakage from the magnetic pole surface of the permanent magnet 1 that the ferromagnetic plate 5 comes into contact with.
Further, FIG. 5 shows an embodiment in which the case 3 is not used at all, and the permanent magnet 1 and the ferromagnetic plate 2 are directly bonded.

In Fig. 6, the ferromagnetic rod 7 and the ferromagnetic plate 2 are integrated by brazing or welding.
The figure shows a ferromagnetic rod 7 with a small-diameter screw rod at one end and screwed into a female screw hole provided in the center of the ferromagnetic plate 2, and FIG. 8 shows a case where it is inserted as a pin. Fig. 9 shows that the ferromagnetic plate 2 and the ferromagnetic rod 7 are integrally molded, and Fig. 10 shows that a circumferential concave step edge is formed along the outer periphery of the joint surface of the permanent magnet 1 with the ferromagnetic plate 2. This is an example provided.

When fixing a fastener based on the magnet 1 having such a structure to the base plate 8, the tube portion 4a of the mounting plate 4 inserted through the base plate 8 is attached to the other end surface of the base plate 8. In contrast, there are two cases: a direct crushing engagement, a case where a washer 9 is interposed in this crushing engagement as shown in FIG. Base plate 8 from the other end surface of base plate 8
By piercing the pipe part 4a and press-fitting the pipe part 4a of the previous mounting plate 4 into this pipe part 10a, the pipe part 4a
Other considerable methods are contemplated, in which the expanded head end of the lever is brought into tight engagement with the inner circumferential wall surface of the tube portion 10a.

By folding the periphery of the mounting member 10 and attaching it to the periphery of the decorative button 11 in a crumpled manner, a special attachment means for the decorative button 11 is not required, and this kind of decorative button 11 can be significantly reduced in installation cost.

The present invention has the above-mentioned characteristic configuration, which makes it possible to attach one of the engaging tools to the base plate 8 extremely easily, that is, by simply press-fitting or press-fitting the tube portion 4a of the plate 4, The number of parts for installation is minimized, and the appearance after installation is also extremely good.

That is, in contrast to the conventional method in which a mounting plate having a mounting leg piece is engaged with a mounting washer into which the leg piece is inserted and locked, one of the engaging tools having the magnet 1 is already integrated. It is sufficient to simply crush the pipe portion 4a of the plate 4, which is attached to the plate, through the base plate 8.
Particularly when the mounting member 10 is used, a simple press-fitting of the mounting member 10 into the tube portion 10a ensures instantaneous and reliable fastening.

In particular, in such a simple press-fit fastening method, there is no need for subsequent manipulation of the press-fit end, especially caulking, bending, etc., and the use of the decorative button 11 is made completely possible. .

In addition, by changing the structure that was held at two or more fulcrums as in the conventional example to a single fulcrum of the tube parts 4a and 10a, one engaging tool having the magnet 1 has a certain rocking motion. By providing a width and having this swing width, it is possible to maintain a more stable state of magnetic attachment with the ferromagnetic plate 5.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a typical embodiment of the present invention, FIGS. 2 to 10 are sectional views showing other embodiments, and FIGS. 11 to 13 are sectional views showing embodiments of the plate 5. 14 to 16 are cross-sectional views showing various examples of engagement partners. In the figure, 1...Permanent magnet, 2...Ferromagnetic plate, 3...Case, 4...Mounting plate, 5...Magnetic shield plate, 6-7
...Ferromagnetic rod, 8. Base plate, 9. Washer, 10. Mounting member, 11. Decorative button.

Claims (1)

[Claims] 1. One ferromagnetic plate is fixed to one pole end face of a permanent magnet having a suitable engagement hole opened from one pole end face to the other pole end face. , and the other ferromagnetic plate and the previous ferromagnetic plate are brought into contact with the other magnetic end face in a detachable manner through the hole in the permanent magnet. In the engagement tool, a mounting plate with a substantially central portion bulged in the shape of a bottomed tube is attached to the end surface of the ferromagnetic plate fixed to the permanent magnet of the engagement tool that does not come into contact with the permanent magnet. In addition, the peripheral edge of this mounting plate is bent and fixed to the joint end surface of the attached ferromagnetic plate with the permanent magnet, and the mounting plate is inserted through a hole prepared separately in the base plate. An engagement tool characterized in that a tubular portion is caulked to the base plate. 2. A ferromagnetic plate fixed to the permanent magnet has a circumferential recessed step edge having the thickness of the mounting plate on the periphery of the end surface of the ferromagnetic plate that is connected to the permanent magnet. An engagement tool according to scope 1.