JPS5972105A - Engaging device - Google Patents

Abstract

PURPOSE:To prevent magnetic interference to a magnetic recording body without decreasing the magnetic attractive force, by a method wherein peripheral edge of a magnetic shield plate installed on a permanent magnet with an engaging hole is covered by a non-magnetic substance. CONSTITUTION:A permanent magnet 1 has an engaging hole 1a, and both surfaces of the magnet 1 are entirely covered except for the hole 1a by a ferromagnetic plate 3 and a ferromagnetic plate 2 as magnetic shield plate attached thereto, respectively. Peripheral edge of the plates 2, 3 is locked by bent edges 4a, 4b of a non-magnetic case 4. The edge 4a and the plate 3 constitute a flat surface by concave step edge provided at peripheral edge of the plate 2. Since the attractive surface of the engaging member (a) is flat, the magnetic attractive force is not decreased. Since the edge 4a of the magnetic recording body serves as a protective edge, contact to the plate 3 is obviated. In this constitution, magnetic interference to the magnetic recording body is prevented without decreasing the magnetic attractive force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fastener using a permanent magnet, particularly to the disclosure of an engaging structure with high magnetic shielding effect.

On the other hand, in the conventional magnetic shield structure of this type of engagement tool using permanent magnets, the shield plate is often completely covered by the case, and in such a structure, the magnetic shielding effect is low. However, it has the disadvantage that the magnetic force is reduced by an amount equivalent to the thickness of the case.

In addition, in this method, the case material is the shield plate.
The bulkiness of the stop itself is increased by being double coated with the
Furthermore, the cost of the case parts increased, and the stop structure was not necessarily satisfactory.

Also, are other methods that fully expose the shield plate sufficient in terms of methods? Although magnetic adhesion is guaranteed, magnetic interference when directly touching the shield plate surface is of no concern.

The wooden invention was devised especially in view of the inconveniences in the conventional precedent, and the folded edge of the case was folded into the magnetic rolled plate surface, and this folded edge was used to directly connect the magnetic shield plate. This is designed to avoid contact as much as possible, and also to reliably prevent the magnetic force of the stopper from diminishing.

The details of the present invention will be described below with reference to a typical embodiment shown in the drawings. (1) is a permanent magnet, and an engaging hole (1) a is formed from one magnetic pole surface to the other magnetic pole surface. At the same time, a ferromagnetic plate (2) for magnetic pole is attached to one of the magnetic pole faces of the magnet (1), and a ferromagnetic plate (3) for magnetic shielding is attached to the other magnetic pole face, respectively, to form a substantially cylindrical shape. eggplant brass,
Holding the plastic or other non-magnetic case (4),
The plates (2), (3) and the permanent magnet (1) are fixed together in one piece. Therefore, the non-magnetic case (4) is made of a plate (
3) Fold the edge (4) a onto the surface and fold the other edge of the outer case (4) of the plate (3) at an appropriate interval.
) on the end face of the magnet (4) as a locking edge (4)b.
This is intended to securely attach plates (2) and (3) to 1).

In addition, along with the attachment of this plate (2), it is planned to attach the member (6) at the same time in order to attach the attachment body to the base plate (5) of a handbag, etc. Although the figure and FIG. 6 show typical examples thereof, it is of course possible to integrally fasten the recessed member (6) for other general washers. .

A ferromagnetic tube (2) a is installed vertically on the plate (2)-J so as not to contact the inner circumferential wall surface of the hole (1) a in the magnet (1), and the rod (2) is basically a magnet (1)
The length dimension reaches the middle of the hole (1)a, and the handle having bent leg pieces (6)a to (6)a is swaged together with the member (6) to the plate (2). It is something that

In addition, in the case of this rod (2) a with 4 = J, with such caulking, the rod (2) a with ζ 1 is press-fitted into a pin shape, a spiral rod shape, and a crotch pull. Direct attachment to the plate (2) in the form of a spiral rod or other appropriate form, or attachment via a flange washer (7), nut (8), or other members, is planned.

For the structure of the visible stop a, the plate (3) is used as the other stop.
The ferromagnetic hook (9) that comes into contact with and is magnetically attached to the end face -1 of the plate (2) passes through the hole (1) a of the permanent magnet (1). It has a protruding ferromagnetic rod (9)a that comes in contact with the top end, and like the above-mentioned stopper a, the handle having bent leg pieces (lO)a to (10)a has a washer (lO) attached to it. At the same time as the caulking in step (9) a, 11 pieces are attached to the plate (9) in one piece.

The embodiment shown in Fig. tiS1 is a more typical embodiment of the wooden invention, and is provided on the peripheral edge of the plate (2), especially the plate (3), by bending the sea lions of the case (4). By configuring the edge (4) a so that the edge (4) a of the case (4) fits into the four-step edge, the Ilz tool a that the plate (9) comes into contact with can be
The adsorption surface of the plate (3) is provided as the same smooth end face, and the dashed line (4) a covers the periphery of the plate (3) serving as a magnetic shield, so that the plate (3) is once restrained. The shielding effect is prevented as much as possible from being nullified by direct contact of magnetic tape or the like with the plate (3).

Moreover, in this case (4), by constructing a cylindrical body for the funeral, it is possible to reduce the cost of manufacturing the parts and the cost of assembly at the same time.

In addition, the embodiments shown in FIGS. 2 to 4 show examples of various attachments to the base plate (5) of a handbag, etc., and in FIG. Figure 3 shows how a' is fixed to the flange washer (7) through the screws.
An embodiment in which the rod-shaped rod part (2) a' is directly screwed onto a board, etc.
The embodiment shown in FIG. 4 shows the state in which it is tightened with a nut (8).

Furthermore, the examples shown in FIGS. 5 and 6 are cases in which the 1st member (6) is shaped like a funnel or a bottomed funnel, and each of the 4th and 6th members has a different shape. (6) It is designed to be fixed to the base plate (5) by press-fitting or fitting at an angle of (6)°.

Next, in the case shown in Fig. 7, the abutting end surface of the plate (θ) is a rounded surface or a tapered surface, and the hole (1) of the rod (2) a is
It is designed so that it can be inserted into the hole reliably and easily.

Furthermore, in the embodiment shown in Fig. 8, the plate (2) is extended laterally, and additional parts such as bands and chains are placed at the end (2)b, and is particularly useful for buckles, chain metal, etc. It is something that

Furthermore, in the embodiment shown in FIG. 9, the plate (2) is punched out and bent as a piece (9) a, without adding a rod (2) a to the plate (2). The ends of the plate (9) are bent so as to be flush with the plate (2). The present invention is characterized in that the case (4) is used to press down the upper and lower plates (2) and (3) of the magnet (1), and the holding edge (4) is pressed against the plate (3). ) By using a as a peripheral protection frame for the magnetic shielding plate (3), the above-mentioned characteristics can be expected to be effective.

In particular, the present invention is constructed to avoid the possibility that the end of the tool a shielded by the plate (3), especially the magnetic recording portion, may come into direct contact with the plate (3). Therefore, even when a cash card containing magnetic recording content or various credit cards comes into contact, the edge (4)a acts as a protective edge and prevents contact with the surface of the plate (3) as much as possible.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a typical embodiment of the present invention, MS
2 to 9 are sectional views showing other embodiments. In the figure, (1)...permanent magnet, (2), (3)...
Ferromagnetic plate, (4)...case, (5)...base plate. (6)...Additional issues include parts, (7)...washers, (8)...
...It shows Natsuto. Figure l Figure Inn Figure 3 Figure 2 Figure 4 Figure 0n Figure 5 Figure 7 Figure QQ Figure 9 Figure 8

Claims (1)

[Claims] A ferromagnetic plate (2) fixed to one magnetic pole end face of a permanent magnet (1) with an engaging hole opened from one magnetic pole face to the other magnetic pole face, and the other magnetic pole face (1) a. In a stop that is adapted to be magnetically and removably abutted, the end face of the ferromagnetic plate (2) of the magnet (1) of the stop is not attached except for the hole for engagement. A bent edge (4) of a cylindrical non-magnetic case (4) in which the four-stage edge provided on the circumferential side of the ferromagnetic plate (3) is separately fitted into a permanent magnet (1) to cover the end face. An engagement tool characterized in that it is locked at point a, and the chain line (4) a and the plate surface (3) form a flat end surface.