JPS5972109A - Engaging device - Google Patents

Abstract

PURPOSE:To prevent magnetic interference to a magnetic recording body, by a method wherein one engaging member with an engaging hole is fitted to an attaching substrate and edge flange projecting from the magnet surface is provided. CONSTITUTION:An engaging member (a) comprises a permanent magnet 1 with an engaging hole 1a, a ferro-magnetic plate 2 disposed to both surfaces of the magnet 1, and a ferro-magnetic plate 3 with shield edge 3a, 3b. The engaging member (a) is fitted in a non-magnetic case 7 having edge flange 7a inserted to opened portion of a mounting substrate (c). Then the edge flange 7a projects from the magnet surface, i.e. plate 3. In such constitution, the edge flange 7a serves as a protective edge thereby contact of the magnetic recording body to the plate 3 is obviated. Thus magnetic interference to the magnetic recording body is prevented.

Description

[Detailed Description of the Invention] This invention provides an engaging tool, especially an engaging tool having a magnetic part, which is mounted on a handbag, etc., within the wall thickness of a large plate, thereby improving the appearance and simplifying the use. In addition, the present invention relates to the provision of an engaging tool that completely prevents the occurrence of accidents due to leakage magnetism not only on the magnetic pole surface of the magnet used, but also on the circumferential surface thereof. Conventional engagement tools that utilize this type of magnet often require a considerable wall thickness on the base plate surface.
It is not necessarily desirable in terms of appearance, and in use, it is necessary to align the other engaging tool with the raised end surface of the engaging tool, and requires considerable experience and sensitivity when securing it. That is.

In addition, in such an engaging tool, the leaked magnetic lines of force induce the destruction of the magnetic recording of the magnetic tape, magnetic card, or cast, and recently this type of card,
Due to the increased use of casts, countermeasures are being demanded.

The present invention was devised especially in view of the inconveniences of the conventional engaging tools, and the magnetic part is changed to make one of the engaging tools necessarily thick. Incorporate into the base,
The end face of the base and the end face of this engagement stage are placed on substantially the same plane to facilitate the magnetic attachment operation of the other engaging tool, and the extra edition of the engaging tool eliminates the gap that inevitably occurs between the bases. -・It is meant to convey a sense of sadness.

In addition, since the side surface of the engaging tool is completely covered with such a base and a separate plate (3) is interposed on the magnetic pole surface, magnetic leakage is basically prevented, and the outer peripheral side surface Magnetic disturbances due to leakage are completely avoided.

The details of the present invention will now be described with reference to a typical embodiment shown in the drawings, in which a permanent magnet is provided with an engaging hole (1)a extending from one side of the magnetic pole face to the other side of the magnetic pole face. (1) -
- A ferromagnetic plate (2) is attached to one magnetic pole face, and a ferromagnetic plate (3) for magnetic shielding with a hanging piece is attached to the other magnetic pole face excluding the hole (1) a, and this plate ( 2), (3) are placed in a non-magnetic case (7) with an inner circumferential edge (7) and (8).
3) is press-fitted so as to come into contact with the edge (7) a.

The engaging tool a having the above configuration is press-fitted into the dish-shaped non-magnetic case (7) which is inserted into the opening in the base C so as to engage the edge (7) a. With eggplant and plate (
2), so that the folded leg piece (8)a of the one-piece washer (8) fixed in one piece is bent and fixed to the base C from the bottom hole of the case (7) via the washer (9). This is what I did.

Next, on the face (3), especially the edge (7) of the case (7)
A is provided with a retaining edge, and a ferromagnetic rod (5) that reaches the wi (2) surface through the hole (1) a is erected on a ferromagnetic plate (4) that fits inside this plate, and It is designed to be caulked to the plate (4) together with the washer (8).

In the embodiment shown in FIG. 2, the culm (5) is
) A ferromagnetic rod (6) is erected on the surface of the plate (2) and the plate (2) is attached to the plate (2) together with the washer (8).
), and furthermore, in the embodiment shown in Fig. 3, the culm (5) is omitted and the rod (6) is opened in the plate (3) until it reaches one edge. It is a length dimension.

In addition, a shield edge (3)b is provided on the opening edge of the plate (3), which slightly protrudes into the hole (1)a and forms a magnetic focusing edge, which is effective in preventing magnetic leakage. This is intended to improve magnetic adhesion.

In addition, the periphery of the contact end of the rod (5), CB) is rounded to reduce the actual contact area and particularly increase the magnetic flux distribution density on the magnetically attracted surface, making the magnetic attraction even better. .

Furthermore, the interposition of the rim (7) a in the case (7) prevents magnetic cards, tickets, etc. from coming into direct contact with the plate (3) as much as possible, effectively preventing damage to magnetic records. It is.

In particular, since the plate (4) is in contact with the base C at the same end surface, even if several other bases are attached to this plate (4), each base will be in close contact with each other. It is said to have good adhesion between the lid and the main body as a customary engagement tool.

This avoids the problem of the lid coming off during use, especially the problem of it being attached to the outside.

Furthermore, by embedding it in the visible base C, magnetic leakage from the external force circumferential surface of the engaging tool a does not become a problem, and there is a problem of magnetic destruction due to slight contact only at the upper surface of the magnetic pole. I kept it to a minimum.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the engaging tool according to the present invention;
FIGS. 2 and 3 are sectional views showing other embodiments. In addition, in the figure (1)... permanent magnet, (2) to (4)...
Ferromagnetic plate, (5)-(6)...Ferromagnetic rod, (7)...
・Case, (8) to (9)... Indicates a washer. Patent Applicant Co., Ltd. Ta-Mo Representative Patent Attorney Minoru Kuwahara

Claims (1)

[Claims] Engagement hole (1) from one side of the magnetic pole face to the other side of the magnetic pole face.
A ferromagnetic plate (2) is placed on one of the magnetic pole faces of a permanent magnet (1) having a hole (a), and shield edges (3) a, (3) b are placed on the other magnetic pole face excluding the hole (1) a. ferro-magnetic (3
), and the other engaging device consists of a ferromagnetic plate (4) that is magnetically and removably abutted on the same plane as the ferromagnetic plate (3). 2) and/or (4) - ferromagnetic rods (5) and (8) protruding from the force
In the 12-piece engagement tool, the engagement tool a is provided with an opening in the mounting base plate so that the plate (2), (4) or the other plate (5), (8) can be brought into contact with the plate (5), (8) in a magnetically detachable manner. The plate (3) is press-fitted into the non-magnetic dish-shaped case (7) formed by IK bonding to the upper surface of the case (7).
A retaining tool characterized in that the peripheral edge of the vertical edge is provided with a retaining edge (7)a that protrudes upward from the surface of the fitted magnet.