JP2578398B2 - Magnetic attraction engagement tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic attraction engaging device for closing a mouth of a handbag or the like by using the attraction force of a permanent magnet, and more particularly to a magnetic flux at an attraction end face of a ferromagnetic button. The present invention relates to a structure of a magnetic attraction engaging device in which a magnetic attraction force is increased with the density being the best magnetic flux distribution mode.

[0002]

2. Description of the Related Art FIG. 6 is a side sectional view of a conventional magnetic attraction engaging device. As shown in FIG.
, And a second engaging member 33. The first engagement member 32 is a washer 35 having attachment leg pieces 35a, 35a for attachment to an opening of a handbag or the like.
And a flat and circular ferromagnetic plate 36 made of a ferromagnetic material such as iron, cobalt, nickel, or an alloy thereof, and a small-diameter base end inserted into the washer 35 and the ferromagnetic plate 36 and swaged to form a large-diameter. Is formed by a ferromagnetic button 37 protrudingly provided on the ferromagnetic plate 36 side, and a second engaging member 33 is provided with mounting leg pieces 40 for mounting on an opening of a handbag or the like.
a, 40 a, a flat and circular ferromagnetic plate 41, a circular ring-shaped permanent magnet 42, a case 43 covering the ferromagnetic plate 41 and the permanent magnet 42, and a small-diameter base end. Insert the washer 40 and the ferromagnetic plate 41 and crimp it,
A large-diameter attracting portion is formed by a ferromagnetic button 45 protruding from the ferromagnetic plate 41 and provided in the hollow hole of the circular ring-shaped permanent magnet 42.

As shown in FIGS. 6 and 7, the first engaging member 32 and the second engaging member 33 are engaged, and the tips of the ferromagnetic button 37 and the ferromagnetic button 45 are brought into contact. Then, the lines of magnetic force of the magnetic pole surfaces 42a and 42b of the permanent magnet 42 are taken into the ferromagnetic plates 36 and 41, respectively, and after forming the magnetic field,
The ferromagnetic buttons 37 and 45 collect the magnetic attracting force at the contact ends thereof, and the magnetic attracting force of the ferromagnetic buttons 37 and 45 is used as the engaging force of the magnetic attracting engagement tool 31.

[0004]

By the way, in the magnetic attraction engaging device as described above, as shown in FIG. 7, the button heads 37a, 37a, gradually reduced in diameter toward the contact ends of the ferromagnetic buttons 37, 45.
However, since the button heads 37a and 45a are in contact with each other and the peripheral portions are not in contact with each other, there is a problem that the contact area is small and the magnetic attraction force is small.

In view of the above, the present invention provides a magnetic attraction engaging device which is configured so that an outer peripheral portion of a contact surface of a ferromagnetic button which is a component of the magnetic attraction engaging device is in contact with the magnetic attraction engaging device. It is intended to provide.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a first ferromagnetic button protruding from a central portion of a front surface of a first ferromagnetic plate and a rear surface having a first ferromagnetic button. A first engaging member to which a mounting leg piece is fixed, a second ferromagnetic button protruding from the center of the front surface of the second ferromagnetic plate, and a hollow hole formed around the second ferromagnetic button. A second engaging member having a ring-shaped permanent magnet having a periphery and a mounting leg fixed to the back surface of the second ferromagnetic plate, wherein the first engaging member is provided in a hollow hole of the permanent magnet. And a second ferromagnetic button and a second ferromagnetic button, wherein the first ferromagnetic button and the second ferromagnetic button are attracted to each other. The magnetic attraction engagement device has a shape in which the end surface on the contact side is gradually depressed from the outer periphery toward the center. Further, each of the end surfaces of the first ferromagnetic button and the second ferromagnetic button on the suction contact side may have a shape in which an outer peripheral portion protrudes.

[0007]

According to the above construction, when the first ferromagnetic button of the first engaging member and the second ferromagnetic button of the second engaging member are brought into contact in the hollow hole of the permanent magnet, the permanent magnet The magnetic lines of force of both magnetic pole surfaces are taken into the first and second ferromagnetic plates, and after forming a magnetic field, are collected by the first and second ferromagnetic buttons, and a strong attraction force is generated on the contact surface. At this time, the end surfaces of the first ferromagnetic button and the second ferromagnetic button on the suction contact side are gradually depressed from the outer periphery toward the center, and are the corners of the magnet that generates the maximum magnetic force. The outer peripheries of the end surfaces on the suction contact side are in contact with each other and the contact area is large, so that a stronger magnetic force, that is, a stronger magnetic suction force is generated.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a magnetic attraction engaging device according to an embodiment of the present invention. FIG. 1 is a side sectional view of a magnetic attraction engagement device according to the present invention, and FIG. 2 is a perspective view thereof. As shown in FIGS. 1 and 2, the magnetic attraction engagement device 1 is a first engagement device. 2 and a second engagement member 3. The first engaging member 2 includes a washer 5, a flat and circular ferromagnetic plate 6 made of a ferromagnetic material such as iron, cobalt, nickel, or an alloy thereof and having a hole formed in the center thereof. It is formed by a ferromagnetic button 7 made of a magnetic material. The washer 5 includes leg pieces 5a, 5a and a plate 5b for attaching the first engagement member 2 to one of the mouths of a handbag or the like, and the ferromagnetic button 7 is circular in plan view and has a small diameter. It has an end portion 7a and a suction portion 7b having a larger diameter than the base end portion 7a. Then, the small-diameter base end 7a of the ferromagnetic button 7 is inserted through a hole formed in the center of the washer plate 5b through the ferromagnetic plate 6, and the inserted small-diameter base end 7 is inserted.
a is crimped, the washer 5 and the ferromagnetic plate 6 are integrated, and the ferromagnetic button 7 is mounted in a state in which the suction portion 7b of the ferromagnetic button 7 protrudes toward the ferromagnetic plate 6 side.

The second engaging member 3 includes a washer 10, a flat and circular ferromagnetic plate 11 having a hole formed in the center, a circular ring-shaped permanent magnet 12, a case 13, And the ferromagnetic button 15. The washer 10 includes leg pieces 10a, 10a for attaching the second engagement member 3 to the other of the mouths of the handbag or the like, and a plate 10
b, the ferromagnetic button 15 is circular in a plan view, and has a small-diameter base end portion 15a and a suction portion 15 having a larger diameter than the base end portion 15a.
b. And the washer plate 10b
A small-diameter base end 15a of the ferromagnetic button 15 is inserted through a hole formed in the center of the ferromagnetic button 15 through the ferromagnetic plate 11, and the inserted small-diameter base end 15a is swaged to form the washer 10 with The ferromagnetic plate 11 is integrated, and the suction portion 1 of the ferromagnetic button 15 is
The ferromagnetic button 15 is mounted in a state where 5b protrudes toward the ferromagnetic plate 11 side.

On the ferromagnetic plate 11, a circular ring-shaped permanent magnet 12 having an outer diameter substantially equal to that of the ferromagnetic plate 11 is mounted. Of the permanent magnet 12 is formed so as to protrude from the upper surface of the attraction portion 15b of the ferromagnetic button 15. Then, the permanent magnet 12 and the ferromagnetic plate 11 are housed in the case 13, and the locking piece 13 a provided around the opening edge on the inner diameter side of the case 13 is bent toward the permanent magnet 12, and The permanent magnet 12 and the ferromagnetic plate 11 are integrally held by bending the locking pieces 13b, 13b,...

FIG. 3 is a side sectional view of the ferromagnetic buttons 7 and 15 constituting the first and second engaging members 2 and 3, as shown in FIG. The edges of the tips of the suction portions 7b, 15b of the buttons 7, 15 have acute angles and are gradually depressed toward the center from the tip outer peripheral portions 7c, 15c.

Since the present invention has the above configuration,
When the first engaging member 2 and the second engaging member 3 are engaged and the attracting portion 7b of the ferromagnetic button 7 contacts the attracting portion 15b of the ferromagnetic button 15, the magnetic pole surface of the permanent magnet 12 12a and 12b
The lines of magnetic force (see FIG. 1) are captured by the ferromagnetic plates 6 and 11 and form a magnetic field, which is then collected on the ferromagnetic buttons 7 and 15.
A strong suction force is generated at the tips of the suction portions 7b and 15b and the outer peripheral portions 7c and 15c as the contact surfaces. At this time, the attracting portions 7b and 15b serving as corners of the magnet that generates the maximum magnetic force.
Since the outer peripheral portions 7c and 15c of the end portions of the first and second contact portions come into contact with each other, a stronger magnetic force, that is, a stronger magnetic attraction force is generated as compared with the contact with the central portion. Strongly and reliably adsorbed.

Next, as shown in FIG.
An embodiment will be described. Instead of the ferromagnetic buttons 7 and 15, ferromagnetic buttons 17 and 18 are used.
Reference numeral 8 denotes a circular shape in a plan view, which has small-diameter base ends 17a, 18a and suction parts 17b, 18 larger in diameter than the base ends 17a, 18a.
b, and the outer peripheral portion 1 of the distal end of each of the suction portions 17b, 18b.
7c and 18c have a protruding shape, and the other configuration is the same as that of the first embodiment. Thereby, the attracting portions 17b, 18 which become the corners of the magnet generating the maximum magnetic force.
Since the outer peripheral portions 17c and 18c of the front end b contact each other, the contact area is large and a stronger magnetic force, that is, a stronger magnetic attraction force is generated, and the first engagement member 2 and the second engagement member 3 are strongly and reliably attracted. Is done.

Next, an embodiment of a device for manufacturing a ferromagnetic button of a magnetic attraction engagement device according to the present invention will be described with reference to FIG. FIG. 5 is a process diagram of the apparatus for manufacturing a ferromagnetic button of a magnetic attraction engagement device according to the present invention. As shown in FIG. The holder 23 is provided with a hole 23a through which the material 22 is inserted. In the hole 23a, a presser bar 25 for regulating the insertion position of the material 22 and removing the material 22 is provided. Is provided so as to be able to advance and retreat.
A mold 26 is provided at a position facing the holder 23. The mold 26 is provided with a first mold frame 27 and a second mold frame 28 beneath the first mold frame 27. The first mold 27 has a truncated right circular truncated cone, and the second mold 28 has a columnar depression corresponding to the suction portions 7b, 15b of the ferromagnetic buttons 7, 15.

Next, the processing steps of the ferromagnetic button will be described. First, as shown in FIG.
Into the hole 23a, and press the tip of the material 22 to the holding bar 25.
, And the material 22 is held by the holder 23.
Then, as shown in FIG. 5B, a mold actuator (not shown) is operated to advance the mold 26 with respect to the holder 23, and the material 22 is pressed by the first mold frame 27.
A portion of the material 22 protruding from the holder 23 is formed in a dango shape, and the mold actuator is operated to retract the mold 26 with respect to the holder 23 as shown in FIG.

Next, as shown in FIG. 5D, the mold actuator is operated to raise the mold 26, and the second
Is moved until the mold frame 28 is positioned to face the holder 23. Then, as shown in FIG. 5E, the mold actuator is operated to advance the mold 26 with respect to the holder 23, and the material 22 is pressed by the second mold frame 28, and the holder 23 of the material 22 is pressed. The more protruding dango-shaped part is formed into a cylindrical shape. Then, as shown in FIG. 5 (f), the mold actuator is operated to retract the mold 26 with respect to the holder 23, and the press bar actuator (not shown) is operated to move the tip of the press bar 25. The ferromagnetic button is advanced from the end of the holder 23 and the molded ferromagnetic button is removed from the holder 23.

Therefore, while holding the material in the holder,
Since the molding is performed continuously by the two molds that are provided side by side and integrated, there is no need to attach / detach the same material to / from different holders or replace the mold every time the molding is performed. , And can be formed smoothly, and the processing efficiency can be improved.

[0018]

As described above, according to the present invention,
The end surface of each of the first and second ferromagnetic buttons on the suction contact side has a shape that is gradually depressed from the outer periphery toward the center, and the suction contact becomes a corner of the magnet that generates the maximum magnetic force. Since the outer periphery of the side end face abuts, a stronger magnetic force, that is, a stronger magnetic attraction force is generated, and the first and second engaging members can be strongly and reliably attracted.

Further, since the projecting outer peripheral portions of the suction portions of the first ferromagnetic button and the second ferromagnetic button are in contact with each other, the contact area is large, and a stronger magnetic force, that is, a stronger magnetic suction force is generated. The first engagement member and the second engagement member can be strongly and reliably sucked.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a magnetic attraction engagement device according to the present invention.

FIG. 2 is a perspective view of a magnetic attraction engagement device according to the present invention.

FIG. 3 is a side sectional view of a ferromagnetic button of the magnetic attraction engagement device according to the present invention.

FIG. 4 is a side sectional view of a ferromagnetic button, showing a second embodiment of the magnetic attraction engagement device according to the present invention.

5 (a) to 5 (f) are process diagrams of a manufacturing apparatus for a ferromagnetic button of a magnetic attraction engagement device according to the present invention.

FIG. 6 is a side sectional view of a conventional magnetic attraction engagement device.

FIG. 7 is a perspective view of a ferromagnetic button portion of a conventional magnetic attraction engagement tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic attraction engagement tool 2 1st engagement tool 3 2nd engagement tool 5 Washer 5a Mounting leg piece 5b Washer plate 6 Ferromagnetic plate 7 Ferromagnetic button 7a Base end of ferromagnetic button 7b Ferromagnetic button 7c Peripheral part of tip of adsorption part of ferromagnetic button 10 Washer 10a Mounting leg piece 10b Plate of washer 11 Ferromagnetic plate 12 Permanent magnets 12a, 12b Magnetic pole surface 13 Case 15 Ferromagnetic button 15a Base end of ferromagnetic button 15b Adsorption part of ferromagnetic button 15c Peripheral part of distal end of adsorption part of ferromagnetic button 17 Ferromagnetic button 17a Base end part of ferromagnetic button 17b Adsorption part of ferromagnetic button 17c Peripheral part of distal end of adsorption part of ferromagnetic button 18 Strong Magnetic button 18a Base end of ferromagnetic button 18b Adsorption part of ferromagnetic button 18c Peripheral part of tip of adsorption part of ferromagnetic button

Claims (2)

(57) [Claims] A first ferromagnetic button protruding from the center of the front surface of the first ferromagnetic plate, and a first engaging member having a mounting leg fixed to the back surface; A second ferromagnetic button is projected from the center of the front surface of the plate, and a ring-shaped permanent magnet having a hollow hole is provided around the second ferromagnetic button. A second engaging member having a mounting leg piece fixed to the back surface, wherein the first ferromagnetic button and the second ferromagnetic button are abutted and detached in the hollow hole of the permanent magnet. In the magnetic attraction engagement tool, the end faces of the first ferromagnetic button and the second ferromagnetic button on the suction contact side are gradually depressed from the outer periphery toward the center. A magnetic attraction engagement tool. 2. The magnetic device according to claim 1, wherein an end surface of each of the first ferromagnetic button and the second ferromagnetic button on a suction contact side has a shape in which an outer peripheral portion protrudes. Suction engagement tool.