JPS6145362B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to improvements in engagement tools using permanent magnets,
In particular, the ferromagnetic member on the side that is attracted to the permanent magnet has been improved to make it suitable for mass production, and the distortion that occurs when attaching this ferromagnetic member has been eliminated to achieve effective attraction with the permanent magnet. The present invention relates to an engaging tool that is configured to

(Prior Art) In conventional engagement tools using permanent magnets of this type, there have been various ways of attaching the male stopper on the side that attracts the permanent magnet. One of them is
A leg piece for mounting is separately attached to the ferromagnetic plate, and this leg piece is inserted into the handbag fabric etc. and bent, and the male stopper is attached to the handbag etc. The other one is attached to the edge of the lid of the handbag. The ferromagnetic plate was bent and fastened so as to sandwich the parts.

(Problems to be Solved by the Invention) However, in such conventional techniques, the following problems remain.

That is, when providing mounting legs on a ferromagnetic plate, it is necessary to separately prepare the mounting legs and attach the legs to the ferromagnetic plate by welding, caulking, or other methods. This has the disadvantage of inevitably increasing the product cost, and when attaching it to a handbag, etc., it is necessary to make a hole in the handbag fabric or stretch the lining fabric to hide the bent part of the inserted leg piece. This required a lot of effort to install. Furthermore, when mounting using such leg pieces, there is a problem in that the portion of the ferromagnetic plate that attracts the permanent magnet becomes distorted during manufacturing or mounting.

Therefore, some attempts have been made to attach a ferromagnetic plate to sandwich the edges of fabrics such as handbags so that they can be attracted to permanent magnets. Since the ferromagnetic plate is soft, it is difficult to bend the ferromagnetic plate smoothly and without distortion.

(Means for Solving the Problems) In the present invention, in view of the drawbacks of the prior art, the engaging tool is constructed as follows. That is, a ferromagnetic member 2 provided on the magnetic pole surface a of a permanent magnet 1 having a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface b, and a ferromagnetic member 3 that is in contact with the magnetic pole surface b. , in the engagement tool which is removably attracted in the hole 1a, the ferromagnetic member 3 is
It consists of a plate part 3' that is attracted to the magnetic pole surface b, and a plate part 3'' that is continuous with this plate part 3' and is folded back so as to sandwich the edge of a fabric such as a handbag. Notches 3b, 3b are formed on the side edge of the plate between ' and plate part 3''.
is provided, and the plate portion 3'' is bent on a line connecting the notches 3b, 3b, and is attracted to the ferromagnetic member 2 in the hole 1a by drawing a part of the plate portion 3'. An engaging tool was constructed in which a ferromagnetic protrusion 3a was formed.

(Embodiment) A typical embodiment of the present invention will be described below with respect to an engaging tool shown in the attached drawings. 1 is a ferrite magnet or the like with a hole 1a opened from the magnetic pole surface a toward the magnetic pole surface b. Various types of magnets such as sintered magnets, steel bar magnets, plastic magnets, or rare earth magnets are used when special attraction force is required. The ferromagnetic member 3 is magnetically and removably brought into contact with the ferromagnetic member 3, and the protrusion 3a squeezed out from the ferromagnetic member 3 with a press is magnetically and removably attracted to the ferromagnetic member 2 through the hole 1a. There is.

The ferromagnetic member 2 is typically composed of a ferromagnetic plate portion 2b and a ferromagnetic rod portion 2a erected within the hole 1a, but it may also be composed of only the ferromagnetic plate portion 2b. Yes, in this case, the protrusion 3a
is directly attracted to this ferromagnetic plate portion 2b.

In addition, the magnet 1 is usually made of a case 4 made of a non-magnetic material.
It is held and fixed integrally with the ferromagnetic member 2 with a
The magnet 1 and the ferromagnetic member 2 can be easily fitted together, and the magnet 1 can be stopped at the center position by having an edge flange 4b that engages the a end and a claw 4a on the opening edge. I promise to wear it.

In contrast to one of the female engagement stops, the other male stop has a projection 3a integrally squeezed out on the surface of the plate-shaped ferromagnetic member 3 using a press, and the ferromagnetic member 3
a plate portion 3' that attracts the magnetic pole face b of the female stopper;
A bent plate part 3'' extends laterally from this plate part 3', and cutouts 3b, 3b are provided inwardly from both side edges between this bent plate part 3'' and the suction plate part 3'. The ferromagnetic member 3 is bent along a line connecting the cutouts 3b and 3b so that the ferromagnetic member 3 is fixed.

Further, claws 3d are provided along both side edges of the plate portion 3' in order to improve the adhesion to the mounting base plate x etc. when the ferromagnetic member 3 is bent and fastened.

In such a configuration of the ferromagnetic member 3, the molding of the ferromagnetic member 3 is completed in one step by simple press molding, and the protrusion 3a, the cutout 3b, and the claw 3d can be created at the same time. The molding cost of the ferromagnetic member 3 is particularly low.

In addition, the presence of the cutout 3b in the ferromagnetic member 3 makes the bending of the plate portion 3'' extremely easy, and the bending edge becomes straight, making it easier to bend the plate portion 3''. Naturally, the magnetically attached end surface with the engaging female stopper is made to be a particularly smooth end surface.

The embodiment shown in FIG. 5 is an example in which the protrusion 3a is narrowed down to the length dimension that reaches the plate part 2b of the ferromagnetic member 2, and the rod part 2a is omitted, and the embodiment shown in FIG. A ferromagnetic plate 6 is arranged on the magnetic pole face b of the magnet 1, and the magnetic field lines emitted from the magnetic pole face b are captured to produce a magnetic shielding effect. For example, in order to increase the magnetic shielding effect of such a plate 6, the periphery of the surface of the case 4 that comes into contact with the ferromagnetic member 3 is raised to form a shoulder 4c, and the magnetic tape, etc. is directly attached to the magnetic pole surface. This is to avoid contact with b.

Further, the embodiment shown in FIG. 8 shows an example in which the case 4 is simplified to have a cylindrical shape, and the upper surface of the magnet 1 is covered with a plate 6.

The embodiment shown in FIG. 9 is an example in which the case 4 in the above described example is omitted, and the ferromagnetic member 2, the plate 6, and the magnet 1 are integrally fixed by a method such as adhesion. , and the embodiment in FIG.
The use of magnets is also omitted, and examples are shown in which plastic magnets, etc., which usually have good impact resistance properties, are used.

In addition, in order to fasten these female fasteners to handbags, clothes, bands, etc., it is customary to insert a washer 5 having legs 5a, 5a, etc. The tool may be attached to the base plate x directly with double-sided adhesive tape or the like, or by means such as screws, bolts, pins, eyelets, welding, brazing, or the like.

Further, the embodiment shown in FIG. 11 shows a structure as an engaging device for a band buckle, necklace, bracelet, etc.

(Effects) The engaging tool according to the present invention has the advantage that the ferromagnetic member 3 is created by simple punching of a ferromagnetic plate and drawing press molding from the above configuration,
The molding cost of the member is dramatically reduced, and the adsorption plate portion 3' of this ferromagnetic member 3 is
It has a flat surface and has the advantage of being effectively attracted to the magnetic pole surface b.

Furthermore, even when the ferromagnetic member 3 is bent and attached, it can be easily and effortlessly bent, so even if the fabric is soft, the ferromagnetic member 3 can be attached without distortion. are doing. As a result, the ferromagnetic member 3 is closely adsorbed onto the magnetic pole face b, and the generation of defective products due to mounting errors is effectively prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the engaging tool according to the present invention before bending the male stopper, FIG.
This figure is a perspective view of the same, FIGS. 4 and 5 are sectional views of the same engaging tool, and FIGS. 6 to 11 are sectional views showing various embodiments of the other female stop. In the figure, 1... permanent magnet, 2, 3... ferromagnetic plate, 4... case, 5... washer, 6... ferromagnetic plate.

Claims (1)

[Claims] 1. A ferromagnetic member 2 provided on the magnetic pole surface a of a permanent magnet 1 having a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface b, and a ferromagnetic member 2 provided on the magnetic pole surface a of the permanent magnet 1, which has a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface b; In the engagement tool in which the magnetic member 3 is removably attracted in the hole 1a, the ferromagnetic member 3 is connected to a plate part 3' which is attracted to the magnetic pole surface b, and which is continuous with the plate part 3'. It also consists of a plate part 3'' which is folded back so as to sandwich the edge of the cloth such as a handbag, and cutouts 3b, 3b are formed on the side edge of the plate between the plate part 3' and the plate part 3''. Provided, said cutout 3
The plate portion 3'' is bent on a line connecting b and 3b, and a ferromagnetic protrusion 3a, which is attracted to the ferromagnetic member 2 in the hole 1a, is formed in a part of the plate portion 3' by drawing processing. An engagement tool characterized by: