JPS6245383B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fastener that utilizes the magnetic force of a permanent magnet, and in particular to a new attempt at a mounting structure for the fastener.

Therefore, in the past, this type of engagement tool, especially a fastener using a permanent magnet, generally used a washer or the like having a leg piece for mounting, but in addition, the leg piece Requires considerable post-processing such as coating the folded surface of the button, and also requires a decorative button or mounting tool with a separate mounting structure when attaching a decorative button, etc. This resulted in an overall increase in costs.

Furthermore, when installing this decorative button, the internal structure of the mounting structure inevitably results in thickening of the button, etc., and the bulk of the mounting part may damage the external appearance or make it difficult to handle. This caused inconvenience.

The present invention has been devised especially in view of the disadvantages of the prior art, and aims to effectively omit the mounting member, reduce the number of steps required for mounting, and reduce the thickness of the mounting member, thereby achieving a good external appearance. It is intended to reduce the cost of performance, production, and installation, and in order to achieve the desired effects of these various characteristics, the gist of the configuration is specifically set as the configuration specified in the scope of the claim, and such. Considerable design changes are planned in conjunction with the configuration outline.

Hereinafter, details of the present invention will be explained with reference to typical embodiments shown in the drawings. In FIGS. 9 to 11, reference numeral 1 denotes permanent magnets having various properties and shapes, and a single magnet or a plurality of magnets. A ferromagnetic plate 2 is attached to one end face of the magnetic pole, and the ferromagnetic plate 2 is integrated into the magnet 1 with a bottomed dish-shaped case 3 made of a non-magnetic member. The case 3 has an engagement hole at its bottom that communicates with the previous hole 1a, and a locking piece 3 that is bent along the rising edge of the opening.
It has a to 3a.

Next, a ferromagnetic plate 4 as shown in FIGS. 5 to 8 which is magnetically and removably abutted on the other end face of the magnet 1 is prepared separately, and this plate 4 is integrated with the previous plate 2. Ferromagnetic rods 5 and 6 fixedly protruding from the magnet 1 are brought into contact with each other in a removable manner via a hole 1a in the magnet 1. In the embodiment shown in FIGS. . When installed vertically facing the opening edge of the hole 1a, in order to prevent the horizontal displacement of the magnetically attached surface with the plate 4, as shown in FIG. is formed.
In the embodiment shown in FIG. 11, rods 5 and 6 are provided protruding from the ferromagnetic plates 2 and 4, respectively, so that they are attracted to each other within the hole 1a, and the rods 5 and 6 are attached to the magnetic surface of the magnet 1. In order to prevent the dispersion of magnetic lines of force, a ferromagnetic plate 7 is separately attached to the magnetically attached end face of the plate 4 of the magnet 1 for the purpose of shielding, and the case 3 in this case is It has a substantially cylindrical shape and has a locking piece 3a or a winding edge on the upper and lower edges of its opening, and furthermore, in response to the characteristics of the magnet 1, as shown in FIG. The protective case 3 is not interposed at all, and the magnet 1 is directly exposed or the surface of the magnet 1 is plated, etc., and in these cases, the same effect as in the above structure is obtained. , which was expected to be effective.

Furthermore, in the case shown in FIG. 13, the engagement of the rod 6 is improved by making the magnetic surface of the magnet 1 an inclined surface that slopes gently downward from its periphery toward the hole 1a. It can be done reliably and easily, and it is said that the mating effect is extremely good.

For the plates 2 and 4 having such a structure, the mounting rod 8 is oriented toward the non-adhesive surface with the magnet 1 or the non-magnetically abutting end surface with respect to the magnet 1, as shown in FIGS. 3 and 4. This protruding mounting rod 8 is press-fitted into the press-fit hole 10a of the mounting washer 10 attached to the other end surface of the base plate 9 to fix the plate 2 and the plate cap 4 to the base plate 9. This is what I did.

Ideally, the rod 8 is basically provided integrally on the extension line of the previous rods 5 and 6, and as shown in FIG. 8a shape, as shown in Fig. 6, it is a circumferential concave and convex rod shape 8b whose diameter gradually decreases toward the tip, and as shown in Fig. 7, it is a tapered rod shape 8c whose diameter gradually decreases toward the tip end, or it has a tapping shape. In the case where screws and other various aspects are planned and the rods 5 and 6 do not exist or in particular need to be constructed separately from the rods 5 and 6, FIGS. 8 and 10. Use of headed pin 8d or plate 2 as shown in
4. There are cases in which the plate is cast by waxing, welding, or caulking, and cases in which it is formed integrally with the plates 2 and 4. In either case, the structure is sufficient to produce the desired effect.

In contrast to the structure of the rod 8, the washer 10 has a recess 1 with the opening part of the press-fit hole 10a facing the mounting hole 9a in the base plate 9, as shown in FIGS. 1 to 4.
A hole 10a is formed in the bottom of the base plate 9, and the size of the recess 10b is within the wall thickness dimension of the base plate 9. Typically, the hole 10a in the bottom part is formed in the base plate 9 for the plates 2 and 4. It is designed to adhere closely to the mounting surface.

Further, although the diameter of the hole 10a is generally smaller than that of the rod 8, elasticity can be imparted to the opening edge of the hole 10a by providing grooves on the sides of the circumference as necessary. Along with this, considerable design changes are planned, such as making the opening edge of the hole 10a stand up slightly upwards, that is, in the direction opposite to the press-fitting of the rod 8, as shown in Figure 2, in order to ensure more secure engagement with the rod 8. It is what was done.

A decorative button 11 is usually attached to such a washer 10, and the appearance of the mounting surface is particularly good.
The press-fitting structure of the washer 10 and the washer 10, the hole 10a in the washer 10 being close to the mounting end surface position of the stopper etc. in the base plate 9, and the decorative button 1 of the washer 10.
By integrally attaching 1, specific effects of the above-mentioned characteristics can be expected.

That is, according to the present invention, the insertion end of the rod 8 is inserted into the hole 10.
a and the button 11, in particular the recess 10b.
The button 11 is securely press-fitted using the gap expanded by the press-fitting mechanism, and compared to the accuracy of this press-fitting, the button 11 needs to be extremely flat, which reduces the bulk of the fastener member. This was definitely avoided.

In addition, the press-fitting surface of the rod 8 to the washer 10 is made as close as possible to the plates 2 and 4 through the base plate 9, thereby preventing loosening of the attachment portion due to subsequent changes in the wall thickness of the base plate 9. Reliably prevents the hole 10 when press-fitting and fastening.
A can be confirmed, making the fastening work even easier.

Furthermore, the decorative button 11 can be attached with one touch, and once inserted, it is guaranteed to be firmly fixed so that it will not come off unless the washer 10 is damaged.

The thickness of the base plate 9 varies depending on the product and is not constant, so it is required to expand enough to accommodate the conventional button 11. Even when the base plate 9 is thick, it is necessary to make the stopper long enough to reach the washer 10, so it is necessary to make the stopper larger, especially in the thickness direction. This is due to the increased bulk.

The present invention has been able to eliminate such inconveniences by using the configuration method described above.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a washer that is a typical embodiment of the present invention, FIG. 2 is a cross-sectional view showing another embodiment, FIG. The figure is a cross-sectional view showing the attached state of the other fastener, and FIGS. 5 to 13 are cross-sectional views showing various types of fasteners. In the figure, 1... permanent magnet, 2... ferromagnetic plate, 3... case, 4... mounting plate, 5-6... ferromagnetic rod, 7... ferromagnetic plate, 8... mounting rod, 9... base plate, 10... mounting washer,
11 shows a decorative button.

Claims (1)

[Scope of Claims] 1. A permanent magnet in which an engaging hole is opened from one magnetic pole end face to the other magnetic pole end face, and a ferromagnetic plate is fixed to one magnetic pole end face, and the other magnetic pole A ferromagnetic plate is magnetically and removably abutted on the end face, and a ferromagnetic rod protruding from either or both of the ferromagnetic plates is brought into magnetically detachable abutment through the magnet hole. In the fastener made of A part of the mounting washer was recessed into this mounting hole, and a press-fit hole for the mounting rod was opened at the bottom of this recess, and the ferromagnetic plate attached to this washer press-fit hole was inserted through the base plate. An engagement tool characterized in that the mounting rod is press-fitted and fixed. 2. The engagement tool according to claim 1, wherein the mounting rod has a pin shape whose diameter gradually decreases toward the tip. 3. The engagement tool according to claim 1, wherein the mounting rod has a spiral rod shape. 4. The engagement tool according to claim 1, wherein the mounting rod is shaped like a tapping screw. 5. The engagement tool according to claim 1, wherein the mounting rod has a multi-stage circular concave-convex rod shape whose diameter decreases toward its distal end. 6. The engagement tool according to claim 1, wherein the width of the recess of the press-fit hole in the washer is within the thickness width of the mounting base plate.