JPS6132801B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention suppresses the occurrence of rust in an engaging tool using a permanent magnet as much as possible, and also improves semi-permanent elongation of the surface of the engaging tool and wear resistance. In particular, the present invention relates to the disclosure of an engaging tool structure in which the outer surface of a case of a permanent magnet in the engaging tool is covered with a wear-resistant resin film designed to promote wear resistance.

(Prior art) Conventional engagement devices of this type utilize permanent magnets as a means of engagement, and therefore many of the components of the engagement device are made of metal, which leads to oxidation and rusting due to use. The surface color of the engagement tool is limited to metallic color due to loss of luster and occurrence of surface scratches.
It does not match the color of the fabric of the bag, etc. to which the engagement tool is attached, and the metal material of the engagement tool is particularly cold to the touch, making it inconvenient as a means of fastening so-called accessories that are directly attached to the skin, such as neck dresses or presslets. I got a lot of points.

In view of this situation, there have been devices in which a metal film or a paint film is provided on the exposed surface of a permanent magnet, such as the engaging tools disclosed in Japanese Patent Application Nos. 55-65807 and 1987-65808.

(Problem to be solved by the invention) However, since permanent magnets are usually sintered magnets such as ferrite, the film inevitably gets between the particles on the surface of the magnet, resulting in unevenness on the film surface. There were problems such as the appearance of unsightly appearance and the effect on suction power.

(Means for Solving the Problems) This invention solves the above problems, prevents the occurrence of rust on the engaging tool, and improves the appearance of the engaging tool by attaching it to one magnetic pole surface b of the permanent magnet 1. A ferromagnetic member 2 and a ferromagnetic member 3 that comes into contact with the other magnetic pole surface a
In this engagement tool, the ferromagnetic member 2 and the permanent magnet 1 are placed in a case 4 having an inverted dish shape consisting of a top wall 4a and a peripheral wall 4b, and the magnetic poles of the permanent magnet 1 are attached to each other. The case 4 is loaded and assembled with the surface a side in contact with the inner surface of the top wall 4a, and at least the outer surface of the top wall 4a of the case 4, which the ferromagnetic member 3 contacts, is covered with a wear-resistant resin film. It is composed of

(Function) The engagement tool configured in this way has a surface of about 0.5
It has a resin film 6 with no unevenness of around 1.5 mm, which prevents abrasions and other surface damage to the engaging tool body as much as possible, and at the same time makes it feel particularly good to the touch, and eliminates the coldness characteristic of metallic colors. The engaging tool has an appropriate color that best matches the ground color of the area where it is used.

A typical embodiment of the engaging tool according to the present invention will be described below with reference to the accompanying drawings. 1 is a bar magnet;
A permanent magnet made of various materials such as a sintered magnet, a rare earth magnet, or a plastic magnet, which has a hole 1a extending from one pole surface b to the other pole surface a, and has a hole 1a formed on the magnetic pole surface b of the permanent magnet 1. The ferromagnetic member 2 attracted to the ferromagnetic member 2 is placed in a case 4 having an inverted dish shape consisting of a top wall 4a and a peripheral wall 4b, and a permanent magnet 1 is loaded with the magnetic pole surface a of the permanent magnet 1 in contact with the inner surface of the top wall 4a. The female stopper is configured to be fixed integrally with the magnet 1.

The case 4 has a hole communicating with the previous hole 1a, and the edge of the communicating hole is bent inward to serve as a retaining edge flange, and a bending claw 4c is provided at the edge of the opening. The case 4 has a so-called inverted plate shape.

Further, the female stopper has a ferromagnetic rod 2a erected in the hole 1a, and a washer 5 having legs 5a, 5a is inserted into the ferromagnetic rod 2.
It has a small diameter rod portion a and is integrally caulked to a plate-shaped ferromagnetic member 2.

Furthermore, the male stopper includes a ferromagnetic member 3 that is removably abutted on the magnetic pole surface a of the female stopper, and a ferromagnetic member 3 that abuts the top end of the previous ferromagnetic rod 2a on the surface of this ferromagnetic member 3. The rod 3a is made to stand up, and the washer 5 is integrally caulked to the ferromagnetic member 3 using the same method.

The surfaces of such female and male stops are impact resistant,
A resin film 6 is formed by covering the resin material with excellent wear resistance, weather resistance, and cold resistance.

The resin film 6 can be coated using various general coating methods such as dobuzuke, spraying,
Brushing, baking, and other coating or film production methods tailored to individual purposes may be used.

2 to 11 show various other embodiments. In the embodiment shown in FIG. 2, the ferromagnetic rod 2a is omitted and the ferromagnetic rod 3a has a length that reaches the ferromagnetic member 2. FIG. 3 shows a case in which the ferromagnetic rod 3a is omitted and the ferromagnetic rod 2a reaches the upper surface of the hole 1a, and an engaging edge flange 3b is provided on the periphery of the ferromagnetic member 3. Fig. 4 shows an example in which a rising edge 4d is provided on the periphery of the top wall 4a of the case 4, and a ferromagnetic plate 7 for magnetic shielding is provided, and Fig. 6 shows an example in which the end face of the female stop is rounded or rounded toward the hole 1a. The ferromagnetic member 3 has a tapered concave surface, and the corresponding top wall 4a of the ferromagnetic member 3 is also rounded or tapered to improve the engagement of the ferromagnetic rod 3a and improve the plating. , Figure 7 shows examples of buckles and fasteners for necklaces, bracelets, bands, etc., and Figures 8-
FIG. 11 shows an example in which funnel-shaped mounting rods 8a, 8b, and 8c are integrally provided in place of the washer 5.

Note that these embodiments all show a curved structure, and in addition, magnets 1 that do not have holes 1a, washers 5, screw rods in place of rods 8, pins, etc. There are some that have considerable attachment means.

(Effects) Since the engaging tool according to the present invention is constructed as described above, the resin coating 6 on the outer surface of the top wall 4a of the case 4, which the ferromagnetic member 3 of the male stopper contacts and attracts, is smooth on the case 4. Since it is coated on the outer surface of the ceiling wall 4a, it has an extremely beautiful appearance without any unevenness, and can be formed into a thin film.

That is, the coated resin film 6 is extremely thin and has almost no effect on the adsorption force of the engagement tool, but it is thick enough to prevent surface oxidation and prevents generation of the engagement tool. This effectively prevents various inconveniences associated with rust.

Furthermore, when the surface is coated with a Teflon resin or the like, wear resistance is significantly improved.

Furthermore, the surface is made of a material with low thermal conductivity, which eliminates the cold feeling during use, and eliminates problems when used in areas that come into direct contact with the skin, such as shirts, nets, bracelets, etc., as well as when used in extremely cold regions. This is what I did.

Further, the coloring of the resin film 6 can be freely selected, and the engaging tool can be made more colorful depending on the purpose than the conventional example which is colored only with metallic colors.

[Brief explanation of the drawing]

FIGS. 1 to 11 are sectional views showing each embodiment of the engagement tool according to the present invention. 1...Permanent magnet, 2, 3...Ferromagnetic member, 4...
...Case, 5...Washer, 6...Resin film, 7...
Ferromagnetic plate, 8...tube.

Claims (1)

[Scope of Claims] 1. An engagement device in which a ferromagnetic member 2 attached to one magnetic pole surface b of a permanent magnet 1 and a ferromagnetic member 3 abutted on the other magnetic pole surface a are removably attracted. In, the ferromagnetic member 2 and the permanent magnet 1 are connected to the top wall 4a.
The permanent magnet 1 is loaded and assembled into an inverted dish-shaped case 4 consisting of a peripheral wall 4b and a peripheral wall 4b, with the magnetic pole surface a of the permanent magnet 1 in contact with the inner surface of the top wall 4a, and at least the above-mentioned strong An engagement tool characterized in that the outer surface of the top wall 4a that the magnetic member 3 comes into contact with is covered with a wear-resistant resin film.