JPS6111453B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides an engaging tool using a permanent magnet, in particular, which minimizes the possibility of magnetic interference, has a strong attracting force, and has a male tool. This invention relates to the disclosure of an engagement tool that prevents lateral displacement.

(Prior art) Conventional engagement tools using this type of permanent magnet have generally focused on effectively drawing out the attraction force, and have been designed to prevent accidents caused by generated magnetism, especially magnetic tape. However, little attention has been paid to the destruction of magnetic recording parts such as magnetic cards or magnetic tickets.

(Problem to be Solved by the Invention) Some attempts have been made to interpose a magnetic shield plate on the magnetic pole surface in order to prevent such magnetic destruction. The shield effect was considered to be completely meaningless when there was contact between the two.

(Means for Solving the Problems) The present invention has been specially devised in view of the inconveniences of the conventional fasteners, and includes a magnetic shield plate attached to the magnetic pole surface, and a magnetic tape attached to the magnetic pole surface.
This structure reliably prevents direct contact with magnetic cards or magnetic chips, and also effectively forms a circuit of magnetic lines of force, eliminates magnetic leakage, and provides strong adsorption force.

That is, a ferromagnetic plate 2 is attached to the magnetic pole face b of a permanent magnet 1 in which an engaging hole 1a is opened from one magnetic pole face a to the other magnetic pole face b, and the permanent magnet 1 and the ferromagnetic plate 2 A rim 6b of the hole 6b of the non-magnetic case 6 is placed in a non-magnetic case 6 which has a short cylindrical shape with a bottom and has a hole 6b communicating with the hole 1a of the permanent magnet 1 at the bottom 6'. ' is fitted into the hole 1a of the permanent magnet 1, and the ferromagnetic plate 3 is removably attracted to the surface of the non-magnetic case 6 on the side of the magnetic pole surface a of the permanent magnet 1.
A ferromagnetic rod 5 or 4 protruding from one of the ferromagnetic plates 2 and 2 is an engaging tool that is attracted to the other ferromagnetic plate 2 or 3 in the hole 1a of the permanent magnet 1. , a magnetic short-circuit prevention gap 10 is provided between the outer peripheral surface c between the magnetic pole surfaces a and magnetic pole surfaces b of the permanent magnet 1 and the non-magnetic case 6, and the magnetic short-circuit prevention gap 10 is provided between the magnetic pole surface a and the magnetic pole surface b of the permanent magnet 1, and The peripheral edge of the bottom 6' of the non-magnetic case 6 is raised to form a convex edge 6a,
The surface of the non-magnetic case 6 surrounded by the convex edge 6a is an engaging tool that serves as a recessed surface for attracting the ferromagnetic plate 3.

(Example) The details of the engaging tool according to the present invention will be described below with reference to a typical example shown in FIG. A permanent magnet in which an engaging hole 1a is opened toward the magnetic pole surface a of the permanent magnet 1, and the magnetic pole surface b of the permanent magnet 1 is
A ferromagnetic plate 2 is attached to the ferromagnetic plate 2, and the ferromagnetic plate 2 and the permanent magnet 1 are fitted into a non-magnetic case 6 having a cylindrical shape with a bottom. The piece 6c was folded onto the ferromagnetic plate 2 to form an integral piece.

Incidentally, the case 6 has a hole 6b communicating with the hole 1a of the permanent magnet 1 in the bottom part 6', and the hole 6b communicates with the hole 1a of the permanent magnet 1.
The edge collar 6 engages with the hole 1a of the permanent magnet 1 along the direction b.
By bending b', the permanent magnet 1 can be attached to the central hole 1 regardless of the outer peripheral frame of the case 6.
The part a is integrated with the case 6, and by configuring the permanent magnet 1 to be smaller than the case 6, a uniform magnetic gap 10 is created between the outer peripheral surface cc of the permanent magnet 1 and the case 6. At the same time, the case 6 is bent and raised along the outer periphery of the magnetic pole surface a of the permanent magnet 1 to form an engaging convex edge 6.
a and is surrounded by the convex edge 6a.
The surface was the suction recess of the ferromagnetic plate 3 of the male stopper.

The ferromagnetic rod 4 is erected on the ferromagnetic plate 2 in the hole 1a of the permanent magnet 1 having such a structure with a considerable magnetic gap between it and the inner wall of the hole 1a. Attached and folded leg piece 8
The narrow diameter rod portion 4a of the ferromagnetic rod 4 is inserted through the mounting washer 8 having a diameter of 1.a and the ferromagnetic plate 2, and the ferromagnetic rod 4 is crimped.

The male stop B that is engaged with the female stop A having such a configuration includes a ferromagnetic plate 3, a ferromagnetic rod 5 protruding from the ferromagnetic plate 3, and a mounting washer having a bent leg piece 9a. 9, and the small diameter rod portion of the ferromagnetic rod 5 is inserted through the ferromagnetic plate 3 and the washer 9 and crimped to integrate them. In the engagement tool having such a structure, the peripheral edge of the ferromagnetic plate 3 is engaged with the protruding edge 6a to prevent lateral displacement of the stopper, and the interposition of the protruding edge 6a Therefore, the magnetic tape, magnetic card, etc. are in a cross-linked state on the magnetic pole surface a, and direct contact of the tape, etc. with the magnetic pole surface a is reliably prevented, and magnetic interference caused by magnetic lines of force is effectively suppressed.

Furthermore, a magnetic gap 10 is formed on the outer peripheral surface c of the female stopper A.
By providing this, even if a magnetic tape or the like comes into direct contact with the outer surface of the case 6, there is no possibility of magnetic disturbance to the contact tape due to the presence of the magnetic gap 10, and this also Effective magnetic shielding was achieved.

The embodiment shown in FIG. 2 does not have the ferromagnetic rod 4, and the male stop B shown in FIG. This corresponds to In the embodiment shown in FIG. 3, a ferromagnetic magnetic shield plate 7 is attached between the magnetic pole face a and the case 6, and when the male stopper B is removed, the magnetic path on the magnetic pole face a is The lines of magnetic force of the ferromagnetic plate 2 are focused on the magnetic plate 2 and the magnetic shield plate 7, and the magnetic force lines of the ferromagnetic plate 2 use the ferromagnetic rod 4 as a passage and the space between the inner opening edges of the magnetic shield plate 7 as a passage. Therefore, no lines of magnetic force protrude outward from the magnetic pole surface a, and
Even when a magnetic tape or the like is brought close to the magnetic pole surface a, there is no risk of magnetic interference. In particular, in the above configuration, since the non-magnetic case 6 is interposed on the surface of the magnetic shield plate 7, there is no fear of magnetic interference even if a magnetic tape or the like comes into direct contact with the male stopper A. It is something.

In the embodiment shown in FIG. 4, the ferromagnetic rod 4 of the ferromagnetic plate 2 in the female stop A of the engaging tool in FIG. It is designed to be adsorbed to the second surface.

Next, the embodiments shown in FIGS.
This is a change in the structure of the case 6 in the embodiment shown in FIG. 4, in which the protruding edge 6a is not bent, and the portion corresponding to the protruding edge 6a is made thicker. With such a configuration of the projecting edge 6a, there is no problem of dimensional unevenness due to bending of the case 6, and the projecting edge 6a stands clearly as the engaging edge of the male stop B.
It has the advantage of being configured.

Next, the embodiments from FIG. 9 to FIG. 12 show other mounting examples for the female stopper A, and FIG. 6 shows an example in which the mounting member 12 is attached to the permanent magnet 1, and FIG. 10 shows an example in which a bottomed funnel-shaped mounting member 12 is similarly attached to the permanent magnet 1. The members (not shown) include a bottomed funnel-shaped mounting member 11 as used in FIG. 10 for the female stop A in FIG. 9, and a bottomed funnel-shaped attachment member 11 as used in FIG. A member having the same shape as the funnel-shaped mounting member 11 is used.

Further, in the embodiment shown in FIG. 11, the small diameter rod part 4a of the ferromagnetic rod 4 is made into a pin shape, and is fixed by piercing the washer 13 having a piercing crack through the fabric. In the example shown in the figure, the small diameter rod part 4a of the ferromagnetic rod 4 is a screw rod, and the washer 14
In addition, the nut 15 is used to secure it to the fabric.

Furthermore, the embodiment shown in FIG. 13 is used as a snap for a shoe band or other bands, and the ferromagnetic plate 2 is laterally extended and the engagement hole for the band is formed in the extended plate part. It was established.

In addition, in the embodiment shown in FIG. 14, a tapered or rounded surface that slopes toward the hole 1a is provided on the attracting surface of the male stop B to improve the fitability of the ferromagnetic rod 5 and to prevent plating on the sloped surface. is particularly good.

Next, the example shown in FIG. 15 is a male stop, and FIGS. 17 and 18 are male stops B with a design change in order to engage with the protrusion 6a of the female stop A. It is.

(Effects) The present invention has the simple configuration described above, and prevents the leakage of magnetism from the magnetic curved surface b from having an adverse effect on a magnetic recording card, etc. that approaches the surface. By preventing close contact, there is no destruction of magnetic recording, and the circuit of magnetic lines of force is connected to the ferromagnetic plate 2, the rods 4, 5 via the tip of the hole 7a of the ferromagnetic plate 7 and the ferromagnetic rod 4. , ferromagnetic plate 7, so there is no magnetic leakage, and there is no magnetic short circuit due to the gap 10 between the case 6 and the outer circumferential surface c of the permanent magnet 1, resulting in strong attractive force and effective magnetic shielding. was brought to the engagement tool.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the engagement tool according to the present invention, FIGS. 2 to 14 are cross-sectional views showing other embodiments of the female stopper, and FIG. 15 is a cross-sectional view showing an embodiment of the male stopper. 16 and 17 are cross-sectional views showing other embodiments of a pair of engagement tools. In addition, in the figure 1... permanent magnet, 2, 3... ferromagnetic plate,
4, 5... Ferromagnetic rod, 6... Case, 7... Magnetic shield plate, 8, 9... Mounting washer, 10... Magnetic gap, 1
1, 12...Mounting member, 13, 14...Washer, 15...
Nut, a, b...magnetic pole surface.

Claims (1)

[Claims] 1. A ferromagnetic plate 2 is attached to the magnetic pole surface a of a permanent magnet 1 in which an engaging hole 1a is opened from one magnetic pole surface a to the other magnetic pole surface b, and the permanent magnet and the ferromagnetic plate 2 are placed in a non-magnetic case 6 which has a short bottomed cylindrical shape and has a hole 6b communicating with the hole 1a of the permanent magnet 1 at the bottom 6'. 6b
The ferromagnetic plate 3 is attached to the hole 1a of the permanent magnet 1 by engaging the edge flange 6b' of the permanent magnet 1, and is removably attracted to the surface of the non-magnetic case 6 on the magnetic pole surface a side of the permanent magnet 1. A ferromagnetic rod 5 or 4 protruding from one of the ferromagnetic plates 2 is an engaging tool that is attracted to the other ferromagnetic plate 2 or 3 in the hole 1a of the permanent magnet 1, A magnetic short-circuit prevention gap 10 is provided between the outer peripheral surface c between the magnetic pole faces a and magnetic pole faces b of the permanent magnet 1 and the non-magnetic case 6, and The peripheral edge of the bottom 6' of the magnetic case 6 is raised to form a convex edge 6a, and the surface of the non-magnetic case 6 surrounded by the convex edge 6a is a concave surface for attracting the ferromagnetic plate 3. An engagement tool featuring: