JPS5972107A - 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 collar projecting from the magnetic surface is provided. CONSTITUTION:An engaging member (a) comprises a permanent magnet 1 with an engaging hole 1a, and ferromagnetic plates 2, 3 disposed to both surfaces of the magnet 1. The engaging member (a) is fitted in a non-magnetic case 8. Then edge collar 8a of the case 8 projects from the plate 2. Next, the case 8 is fitted to a non-magnetic case 7 having edge collar 7a inserted to opened portion of a mounting substrate (c). Then the edge collar 7a projects from surface of the magnet 1. In such constitution, the edge collars 7a, 8a serve 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 The present invention provides an engaging tool, especially an engaging tool having a magnetic part, which is mounted on a handbag, etc. by storing it within the wall thickness of the base plate, thereby improving the appearance and use. Simplification and Use - This is concerned with the provision of an engaging tool that completely prevents any prediction of accidents due to leakage magnetism not only on the magnetic pole surface of the stone but also on its circumferential surface. Therefore, conventional engagement tools using magnets of this type often require a considerable wall thickness on the mounting base plate surface, and the appearance];
This is not necessarily preferable, and in use, it is necessary to align the other engaging tool with the end surface of the raised engaging tool, and requires considerable experience and feeling when engaging. It is.

Also, in such a retainer, leaked magnetic lines of force may cause damage to magnetic tape or magnetic cards.

This is caused by the destruction of the magnetic records of the cicadas,
Recently, with the frequent use of cards and casts of this kind, countermeasures have been required for these materials.

The present invention was devised especially in view of the inconveniences of the conventional engaging tools, and the magnetic part is removed and one of the engaging tools, which is inevitably thick, is removed (= J Kei is taken into the base plate, and the base end face and the end face of this engagement tool are approximately the same plane -1.
In addition to facilitating the magnetic attachment operation of the self-force engaging tool by placing it in the position 1, the additional number of engaging tools is designed to completely eliminate the gap that inevitably occurs between the boards.

In addition, since the side surface of the engaging tool is completely covered with the base 11k and a separate plate (3) is interposed on the magnetic pole surface -L, magnetic leakage is basically prevented, and the outer periphery Any magnetic interference caused by leakage from the sides is completely avoided.

The details of the present invention will be described below with reference to a typical embodiment shown in the drawings.A permanent magnet (1) has a hole (1)a for engagement extending from one pole face to the other pole face. A ferromagnetic plate (2) is attached to one magnetic pole face of the plate, and a ferromagnetic plate (3) for magnetic shielding is attached to the other magnetic pole face excluding hole (1) a, and this plate (2), ( 3) inside a non-magnetic case (8) having an inner peripheral flange (8)a, and a plate (3) with an inner peripheral flange (8)a.
It is press-fitted so that it is in contact with the

The engaging tool a having the above structure is press-fitted into the dish-shaped non-magnetic case (7) which is inserted into the opening in the base plate C so that the edge flange (7) a is engaged. To attach the case (8) to the plate (2) with one body, insert the bent leg piece (8) a of the washer (8) from the bottom hole of the case (7) through the washer (10). It is bent and fixed to the base plate C.

Next, apply the plate (3) side 1-, especially the edge tsuba (8) of the case (8).
) a hole ' in a ferromagnetic plate (4) that fits inside the ferromagnetic plate (4) with a as the connecting edge guard, 1) a ferromagnetic rod (5) that reaches the surface of the plate (2) through a, It is designed to be caulked to the plate (4) together with the mounting washer (9).

In the embodiment shown in FIG. 2, the rod (5) is connected to the hole (1).
) A ferromagnetic rod (6) is set upright on the plate (2) and L, and the plate (2) is attached together with the washer (9).
Furthermore, in the embodiment shown in FIG. 3, the rod (5) is omitted and the rod (8) is caulked.
is the length dimension reaching the opening 1-1 edge in the plate (3).

In addition, one edge of the plate (3) is rounded and slightly protrudes into the hole (1) a to improve the engagement of the rod (5) and at the same time to form a magnetic focusing edge. The purpose of this is to prevent magnetic leakage and improve effective magnetic adhesion.

Also, the contact edges of the rods (5) and (El) are rounded.

By reducing the actual contact area, the magnetic flux on the magnetic surface is reduced by 41
The density is particularly increased to further improve magnetic adhesion.

Furthermore, the edge tsuba (7) a in cases (7) and (8),
(8) Through the intervention of a, magnetic cards, tickets, etc. can be directly @
(3) contact was prevented as much as possible, and accidents resulting in destruction of magnetic recording could be effectively prevented. In particular, since plate (4) is in contact with base plate C at the same end surface, even when other base plates are attached to this plate (4), the respective base plates will be in close contact with each other. As a conventional engagement tool, the lid and the main body have good adhesion, and the problem of the lid coming off during use, especially the application of external force, is avoided.

In addition, by burying the base plate C, there is only a problem of magnetic destruction due to slight contact with the magnetic pole soil surface, and there is no problem with magnetic leakage from the outer peripheral surface of [a] due to engagement. It is something that cannot happen.

Furthermore, the plate (3) can be removed without bending the old edge of the case (8).
) L: The connecting edge flange (8) a stands up at the top, and is intended to reliably prevent horizontal displacement of the plate (4).

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the retainer 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 rod, (5)-(6)...Ferromagnetic rod, (7)-(
8)...Case, (8) to (10)...Washers are shown. Patent Applicant Co., Ltd. Ta-Mo Representative Patent Attorney Minoru Kuwahara

Claims (1)

[Claims] Engagement hole (1) a from one magnetic pole surface to the other magnetic pole surface
A permanent magnet (1) with a ferromagnetic plate (2) attached to one magnetic pole face and a ferromagnetic plate (3) attached to the other magnetic pole face excluding hole (1) a. Tool a and the ferromagnetic plate (
3) The other engaging device made of a ferromagnetic plate (4) which can be freely abutted on the surface while being magnetically attached is provided protruding from both or any one of the plates (2), , and (4). Ferromagnetic rod (5),
(8) to other parts (2), (4) or other parts (5), (
8), the non-magnetic dish-shaped case (7) is formed by fitting the holding tool a into the opening in the base plate A+j. ) is press-fitted with the plate (3) as the upper surface, and a mating edge flange (
7) In addition to a, a cylindrical non-magnetic case (8) is provided on the circumferential surface of the engaging member a so that the upper part thereof slightly protrudes above the plate (3). A protective device.