JPS63224205A - Locking means - Google Patents

Abstract

PURPOSE:To contrive thinning of the title locking means by a method wherein a ferromagnetic plate having a non-magnetic protrusion is attracted to the surface of a magnetic pole in a freely detachable manner by inserting the non-magnetic protrusion into the hole of a permanent magnet, and the thickness between both magnetic pole surfaces of the permanent magnet is formed to be 1.5 mm or smaller. CONSTITUTION:A hole 1a is penetratingly provided from one magnetic pole surface (a) to the other magnetic pole surface (b) of a permanent magnet 1, it is formed into a ring-plate shape of 1.5mm or smaller in thickness and inserted into the non-magnetic case 3 having the inverted plate-shaped hole 3a communicated to the hole 1a of the permanent magnet 1 with the magnetic pole surface (a) positioned inside. The magnetic pole surface (b) is closely fixed to the mounting base metal 4, the engaging piece 3b provided on the aperture edge of the case 3 is penetrated through the mounting substrate 4, and it is mounted by bending. A thin diameter stud part 2a' having a non-magnetic protrusion on one end is inserted into the fine hole provided in the center of a disc-shaped ferromagnetic plate 2, then it is calked after it has been inserted into the fine hole in the washer-like leg member 5 having a pair of bent leg pieces 5a, the non-magnetic protrusion 2a and a leg member 5 are formed in one body on a ferromagnetic plate 2, the bent leg piece 5a is pierced into a mounting substrate 4 ', and it is bent by interposing a washer 6. As a result, an attracting state can be obtained effectively on a thin permanent magnet.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention uses a permanent magnet to obtain effective adsorption with a small magnetic capacity, and has a small thickness, making it suitable for use as a substitute for buttons on clothing, etc. It concerns a convenient stop.

(Prior Art) A conventional stopper using a permanent magnet includes one side of a permanent magnet 101 in which a hole is opened from one magnetic pole face a to the other magnetic pole face, as shown in FIG. 12 filed by the present applicant. magnetic pole face a
Ferromagnetic protrusions 102a and 103a protruding from both the ferromagnetic plate 102 attached to the permanent magnet 102 and the ferromagnetic plate 103 abutting the other magnetic pole face attract each other through the holes of the permanent magnet 101. There was something that was configured to be done.

(Problems to be Solved by the Invention) However, the above-mentioned stop is constructed by attaching a ferromagnetic plate 102 to one magnetic pole face a of a permanent magnet 101, and a ferromagnetic plate is attached to the other magnetic pole face of the female fitting. The thickness of the two ferromagnetic plates 102 and 103 is added to the thickness of the permanent magnet 101, and the two ferromagnetic protrusions 102a and 103a are inserted into the hole of the permanent magnet 101. Since the magnet is attracted to the abutting state, the thickness of the magnet is also required, so the stopper in the fixed state is thick, and if the material to which the stopper is attached is thick, such as leather or cloth for bags and bags, most of the thickness will be within that thickness. However, when it is attached to a relatively thin fabric such as clothing, there are problems such as a large portion protruding from the fabric, which is a nuisance, is heavy, and has an undesirable appearance.

(Means for Solving the Problems) The present invention is a stop provided to solve the above problems, in which a hole is opened from one magnetic pole face a to the other magnetic pole face. A permanent magnet 4 has a magnetic pole face attached to a mounting fabric 5, etc., and a ferromagnetic plate 2 having a non-magnetic protrusion 3 on the magnetic pole face a is attached and detached by inserting the non-magnetic protrusion 3 into the hole la of the permanent magnet l. A stopper characterized in that the permanent magnet 1 is freely attracted and the thickness between the two magnetic pole faces a and b is within 1.5×1.

(Function) In the stop having the above structure, the thickness between the magnetic pole faces a and b of the permanent magnet l is as small as 1.5 cm or less, so the magnetic force line m is
They are all collected on the ferromagnetic plate 2 without protruding outward from the surface, pass through the magnetic pole face a, and reach the vicinity of the magnetic pole face, creating an effective adsorption state.

Furthermore, since the protrusion 2a is non-magnetic, it is not attracted to the magnetic pole surface a or the inner wall of the hole 1a, and is easily inserted into the hole la of the permanent magnet 1, and the inserted protrusion 2a engages with the hole 1a. Therefore, the ferromagnetic plate 2 is able to resist the force parallel to the magnetic pole surface, or the protrusion 2
By making the thickness and length of a suitable for the hole 1a, the engaged state can be maintained even against a force that tilts the ferromagnetic plate.

Moreover, since there is no ferromagnetic plate on the other magnetic pole face of the permanent magnet 1, it is thinner by 0.6 to 1 mm by the thickness thereof, resulting in a very thin stopper compared to a conventional stopper using a permanent magnet.

(Example) An embodiment of the fastener according to the present invention will be described below.

1 is a permanent magnet such as a magnet made of ferrite, alnico, rare earth, etc., a plastic magnet made of these hard magnetic powders and synthetic resin, or a rubber magnet made of rubber; A non-magnetic case 4, which has a top plate shape with a thickness of 1.5 + s or less with a hole 1a extending toward the magnetic pole face, and an inverted dish-like hole 4a that communicates with the hole 1a of the permanent magnet 1. The case 4 is inserted into the case 4 with the magnetic pole face a facing inward, and is attached by bringing the magnetic pole face into close contact with the mounting fabric 5, and then piercing the locking piece 4b provided at the opening edge of the case 4 through the mounting fabric 5 and folding it. There is. 2 is a disk-shaped ferromagnetic plate having approximately the same diameter as the magnetic pole surface a, and the embodiment shown in FIG.
The non-magnetic protrusion 3 and the leg member 6 are integrally mounted on the ferromagnetic plate 2. It is said that
The folding leg piece 6a is pierced through the mounting fabric 5°, and the washer 7 is interposed and folded, so that the leg piece 6a is fixedly attached to the mounting fabric 5°.

Then, the non-magnetic protrusion 3 is inserted into the hole la, and the ferromagnetic plate 2
is attracted and engaged with the magnetic pole face a of the permanent magnet l via the case 4.

In FIG. 3, the permanent magnet 1 is attached to the non-magnetic case 4 by folding the locking piece 4b through a washer 8 attached to the opposite side of the mounting fabric 5 from the permanent magnet 1. By making the washer 8 a ferromagnetic material, the permanent magnet 1 forms a magnetic field with the ferromagnetic plate 2 and the washer 8, so that leakage lines of magnetic force protruding from the outer peripheral surface of the permanent magnet 1 are further reduced. It is.

In this case, the non-magnetic protrusion 3 is bonded onto the surface of the ferromagnetic plate 2, and the ferromagnetic plate 2 is bonded to the mounting material 5'.

In Figure 4, six edges 4c are provided around the bottom periphery of the case 4,
The inner surface surrounded by the six edges 4C is a recessed surface for attracting the ferromagnetic plate 2, and a magnetic recording card such as a cash card or other magnetic recording object that is close to the magnetic pole surface a is attached to the magnetic pole surface by the six edges 4c. An embodiment in which a ferromagnetic magnetic shield plate 9 is interposed between the case 4 and the magnetic pole face a to prevent the magnetic recording object from having any adverse effects such as destruction of magnetic recording. It is.

In addition, there are cases where only the 6 edges 4C are provided, cases where only the magnetic shield plate 9 is provided, etc. Furthermore, although the case 4 is in principle covered, it is also possible to directly attach a plastic magnet etc. without the case. When adhering to the fabric 5, or by making the case 4 cylindrical, covering only the circumferential side of the permanent magnet 1, and attaching it to the mounting fabric 5 using a locking piece provided on the opening edge of the case, or magnetic shielding plate 9. may also be held integrally with the permanent magnet 1 by a similarly provided locking piece.

5 to 7, a ferromagnetic plate 2 and a non-magnetic protrusion 3 are integrally formed by adhesion, welding, etc., and a washer-shaped leg member 6 having the pair of folding leg pieces 6a is attached thereto. When welding,
Alternatively, one end of a tubular body with or without a bottom may be expanded into a funnel shape and then welded.

Figure 8 shows an example in which the leg member 6 with one end of the tubular body expanded into a funnel shape and wrapped around the winding periphery of the washer is crimped together when the non-magnetic protrusion and the ferromagnetic plate are crimped. This is an example.

Figures 9 to 11 show a tapered stepped engagement rod, a screw thread, a pin, etc. extending from the non-magnetic protrusion 3, and inserting it into the hole provided in the center of the ferromagnetic plate 2, and at the same time inserting it into the mounting material. This is a leg member that is adapted to be fixed in place.

(Effects) The stop according to the present invention has a permanent magnet with a hole opened from one magnetic pole face a to the other magnetic pole face, and the magnetic pole face is attached to a mounting fabric, etc., and a non-magnetic protrusion is formed on the magnetic pole face a. A ferromagnetic plate having a non-magnetic protrusion inserted into a hole of the permanent magnet is detachably attracted, and the permanent magnet has both magnetic pole faces a.
, b is within 1.5cm, so the ferromagnetic plate is attracted to one of the magnetic pole faces a, and all the magnetic lines of force of the thin permanent magnet are concentrated on the ferromagnetic plate. Creates a magnetic field that passes through the magnet and reaches near the face of the magnetic pole, creating an effective adsorption state without protruding far from the permanent magnet.

In addition, the protrusions of the ferromagnetic plate are non-magnetic and do not attract to the wall of the hole of the permanent magnet, so they are easy to insert, and when inserted, the permanent magnet and the ferromagnetic plate are held together by attraction and engagement. Therefore, the engaged state is maintained.

In addition, as mentioned above, the permanent magnet is thin, less than 1.5 m, and there is no ferromagnetic plate on one magnetic pole surface, only a ferromagnetic plate that is attracted to the other magnetic pole surface, so the thickness of the stopper is smaller than before. It becomes thin and thin, making it especially suitable as a substitute for buttons on clothing.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the basic structure of the fastener according to the present invention, FIGS. 2 to 4 are cross-sectional views of various embodiments, and FIGS. 5 to 11 are cross-sectional views of various embodiments of the leg member. The sectional view shown in FIG. 12 is a sectional view of a conventional example of a fastener. l... Permanent magnet, 1a... Hole, 2... Ferromagnetic plate,
3... Non-magnetic protrusion, 4... Case, 4a... Hole,
4b...locking piece, 4c...6 edge, 5.5°...mounting fabric, 6...leg member, 6a...folding leg piece, 7.8
...Washer, 9...Magnetic shield plate, a, b...
・Magnetic pole surface, m... lines of magnetic force. Fig. 1a 3C...6 edge 5a...Folding leg piece Fig. 2 Fig. 4

Claims (1)

[Claims] A permanent magnet with a hole opened from one magnetic pole surface a to the other magnetic pole surface b is attached with the magnetic pole surface b attached to a mounting fabric, etc.
A ferromagnetic plate having a non-magnetic protrusion on the magnetic pole surface a is removably attracted by inserting the non-magnetic protrusion into the hole of the permanent magnet, and the permanent magnet has a thickness of 1 between the magnetic pole surfaces a and b.
．． A fastener characterized by being within 5 mm.