JPS5910205A - Engagement device - Google Patents

Abstract

PURPOSE:To enhance a magnetic attracting force and form firmer engagement in view of recovery of the isolated condition of the attracting surface by closely engaging, within a magnet hole, a release-preventing cylinder which is to be engaged removably with a ferromagnetic bar to be inserted, has a large friction resistance and is composed of non-magnetic material. CONSTITUTION:In respective engagement device, fitting metals 9 having bending leg pieces 9a for fitting to be used for a handbag etc. is integratingly fitted to plates 2, 3 with a bar 6 or to a plate 2 with a case 4. A gap to which a release- preventing cylinder 8 is inserted is provided at the internal wall of hole 1a and the bar 6 is pressurizingly inserted through such cylinder 8 inserted into said gap. The cylinder 8 is generally composed of a material having a high friction resistance such as rubber or plastic materials and it is expected to use such a material which shows a certain flexibility when the bar 6 is pressurizingly inserted. Insertion of cylinder 8 prevents direct contactness between the bar 6 and internal wall of hole 1a, realizing enhancement of attracting force owing to formation of a firm and closed magnetic circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for reinforcing the attraction force in a retaining tool using a permanent magnet, particularly a retaining tool provided with magnetic rolling.

Therefore, in this type of engagement tool using a permanent magnet, various efforts have been made to effectively draw out the attraction force of the magnet used and provide an engagement tool with a high attraction effect. It was hard to avoid the feeling that Ayumu was still alive.

Particularly, separation from such a state due to rapid attenuation of the attracting force due to deviation or inclination of the attracting surface is considered to be the greatest difficulty in engaging tools using magnets.

In addition to the problem of strengthening the adsorption force, this type of approach also addresses the problem of destruction of the magnetic recording part due to the recent increased use of magnetic recording systems, especially in cash cards, tickets, etc. There is an increasing demand for effective measures to be taken.

Furthermore, since confirmation of the locking state has been generally overlooked in retainers that use magnets, it is necessary to completely check the locking condition when the other male member is not inserted into the magnet hole. This often leads to unexpected release of the engaging part and the resulting loss of belongings, etc.

The present invention has been devised especially in view of the inconveniences in the prior art, and aims to improve the adsorption force by collecting magnetic flux at the end of the hole (1) a, and at the same time to improve the adsorption force. ) to restore the separated state of the suction surfaces due to the outward inclination of the engaging member, and to assist in the lack of suction force by functioning as a normal pull-out prevention cylinder, creating a stronger locking condition. It's something like that.

Further, in the present invention, the strengthening of the engagement force and the magnetic shielding function are synchronized, and the structure is particularly devised so that both functions can be performed at the same time.

The details of the engaging tool of the present invention will be described below with reference to a typical embodiment shown in the drawings. (1) is a permanent magnet, and a retaining hole (1) is formed from one magnetic pole surface to the other magnetic pole surface. )a
was established.

Then, a ferromagnetic plate (2) is placed on one pole surface of this magnet (1).
), and a magnetic shielding plate (3) is attached to the external magnetic pole surface excluding hole (1) a, and this plate (2) and plate (3) are replaced by a case (4) made of a non-magnetic plate. - The case (4) is designed to be properly attached to the magnet (1) inside the case (4).
) is basically a cylindrical shape for the purpose of securing the plate (2) and plate (3) to the magnet (1) and protecting the outer peripheral surface of the eye magnet (1). .

In addition, as an installation example of this case (4), as shown in Fig. 1, the end face of the plate (3) excluding the hole (1) a and the magnet (
In the case where the outer peripheral surface of 1) is made into a cylindrical shape with a bottom to be covered, and in the case where the outer peripheral surface of the plate (3) is engaged with the peripheral step (3) a of the plate (3) as shown in Fig. 2, the outer peripheral surface of the plate (3) is Bend edge (4) a in the same plane as the surface
Other structural examples are planned, including one in which the folded edge (4)a is placed upright on the surface of the plate (3) to form a retaining edge flange. .

Next, as the other engaging tool, a ferromagnetic plate (5) that is magnetically and removably brought into contact with the surface of the plate (3) is separately prepared, and this plate (5)
A magnetic rod (6) protruding from the hole (1) is brought into contact with the plate (2) through the hole (1) a in a detachable manner.

In addition, each of the engaging tools has a washer (8) having bent leg pieces (9)a to (9)a for attachment to a handbag, etc., and is attached to the plate (2) by holding the rod (8), (7). (3), or the case (4) to the plate (2).
It is fixed inside the body, and it is planned to use pins, bolts, caulked tubes, and other means for this attachment.

Next, a gap (1)b is provided in the inner wall of the hole (1)a, and the tube (8) inserted in the gap (1)b is inserted into the rod (6). It is designed to be press-fitted.

Therefore, the tube (8) is generally made of a material with high frictional resistance, such as rubber or plastic, and is expected to have some elasticity as the rod (6) presses. By interposing this tube (8), the rod (6) and the hole (1) a
Direct contact with the inner wall surface of the tube is avoided, and the attraction force is strengthened by creating a reliable magnetic closed circuit.

Next, in the configuration of the intervening gap (1) b of the cylinder (8),
Board (3) due to problems with moldability and assembly of parts, etc.
Or, one typical example is that it is molded as a constituent gap between the end of the case (4) and the magnet (1), and depending on the case, a constituent gap between the plate (j) and the magnet (1). Alternatively, the end of the plate (3) bent into the hole (1) a and the magnet (
1) or plate (2) was created as a structural void.

In addition, the folded edge (
4) In the case where d is raised as a shoulder to form an engaging edge flange, the plate (5) is sized to fit within this edge (4) a.

Also, as shown in Figure 4, by folding the plate (3) into the hole (1) a, the tube (8) is formed by the folded edge (3) b.
The creation of an intervening gap (1)b, and the promotion of the magnetic shielding effect by this edge (3)b, in particular, to suppress as much as possible the occurrence of accidents due to lines of magnetic force generated between the edge of the plate (3) and the rod (7). This is what I did.

Regarding magnetic shielding, in Figure 5, the circumferential edge of plate (3) is bent at edge (3) C to minimize accidents caused by lines of magnetic force that occur between plate (3) and silver (2). It is designed to suppress LL.

In addition, in the embodiment shown in Fig. 6, in order to ensure smooth engagement of the rod (6), the surface of the plate (3) is inclined toward the hole (1) a, so that the rod (6) can be smoothly engaged. This ensures a good fit of the rod (6) into the hole (1)a, and good coating.

Further, the embodiment shown in FIGS. 7 and 17 is a rod (
The top end surface of 6) is a convex spherical rounded surface 11, and the joint surface of the plate (2) or rod (7) that comes into contact with this is provided with a corresponding concave spherical rounded surface, The rod (
6) is designed to prevent the joint end surfaces from coming apart.

Next, the embodiments shown in FIGS. 8 and 9 show examples in which the Group 1 engagement tool is used for buckles, etc.
The - side edge of the part (5) is extended laterally to form a retaining part (2)a for a band, etc., and the - side edge or both side edges of the part (5) are bent to form a retaining part (2)a.
5) a and the relevant section (5) b and V.

Furthermore, the embodiment shown in FIG. 10 shows an example of a special mounting of the plate (5), and has a structure in which the mounting plate (10) is bent and crimped onto a handbag base plate or the like.

Next, the embodiments shown successively in FIGS. 11 to 20 represent still other embodiments corresponding to the embodiments explained in FIGS. 1 to 12 above. The ejecting prevention tube (8) is made relatively short in order to allow the rod (8) to partially fit tightly.

Therefore, the interposed gap (1) b of the cylinder (8) in the hole (1) a
As a matter of course, the hole (1)a is partially recessed without extending over the entire upper and lower surfaces of the hole (1)a. As already explained, the intervening gap (1)b of this cylinder (8) is between the bent edge (3)b of the plate (3) and the magnet (1), or between this edge (3)b and the plate. (2) or between the magnet (1) and the plate (2),
Various configurations such as between the case (4) and the magnet (1) are planned.

The present invention can achieve specific effects on the above-mentioned characteristics through the characteristic structure described above. Interposed with a magnet (1
), and if necessary, cover the part (3) flush with a case (4) made of a non-magnetic material to completely eliminate this magnetic shielding effect. This is what I did. In addition, by forming the edges of the plate (3) into folded edges (3)b and folded edges (3)C, the magnetic shielding effect is further promoted, and the edge (4) in the case (4) The magnetic shielding effect is almost perfect due to the raised shoulder a.

Next, by bringing the plate (3) and the rod (8) close together, the lines of magnetic force are focused on the core to improve the adsorption force, and the cylinder (8)
With this intervention, contact between the rod (6) and the inner wall surface of the magnet hole (1) a can be reliably avoided, and it is expected that the attraction force will be improved by reliably creating a magnetic path.

Further, by intervening the cylinder (8), the lack of engagement force due only to the attraction force of the magnet (1) is compensated for by the rod (8) against the contact part (8).
), and even when the suction force suddenly decreases due to the slope of the contact end surface of the rod (8), the contact part (
The frictional resistance of the cylinder (8) prevents release of the locked state, and the frictional resistance of this cylinder (8) and a slight elastic force cause the rod (8) to release.
8) is the one that was repelled and attracted to the suction surface.

This effectively overcomes the application of external force in the direction of lever-like pull-off, which is considered to be the biggest problem with magnetic engagement tools, and makes the engagement tool safer and more reliable. This makes it possible to provide the following.

Furthermore, it has the feature that the interposition of the tube (8) makes it possible to reliably recognize the feeling of engagement, and it eliminates the lack of retention, that is, the snap, that often occurs with conventional magnetic engagement tools. The mistake of thinking that the rods (6) were completely engaged due to the suction sound was reliably avoided by this act of snap-fitting the rod (6) into the tube (8).

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the retainer according to the present invention;
2 to 20 are cross-sectional views showing other embodiments. In Figure 1, (1)...Magnet (2)-(3)...Ferromagnetic silver, (4)...K7, (5)...Ferromagnetic silver, (
8) to (7)... Ferromagnetic rod, (8)... Pull-out top protection tube, (8)... Washer, (10)... Mounting silver. Patent Applicant Co., Ltd. Magrida Co., Ltd. Tamo Representative Patent Attorney Minoru Kuwahara 1 Figure 3 Figure 2 Figure 4 Figure 5 Figure 7 Figure 6 Figure 6 Figure 8 Figure 9 Figure 11A 10 Fig. 0 Fig. 12 Fig. 13 9d Fig. 15 Q ＼ 14 Fig. 6 Fig. 16 A Fig. 17 6 d Fig. 19 Fig. 18 Fig. 20

Claims (1)

[Claims] Holding hole (1) a from one side of the magnetic pole face to the other side of the magnetic pole face
A ferromagnetic plate (2) is attached to one of the magnetic pole faces of the permanent magnet (1), and a magnetic shield plate (3) is attached to the other magnetic pole face except for the hole (1) a. Using the non-magnetic case (4) fitted over (1), attach the ferromagnetic plate (2), the TJL, the magnetic shield plate (3), and the magnet (1) to the inside of the body. (3) In a structure in which the ferromagnetic rod (6) of the ferromagnetic plate (5), which is in contact with the surface of the ferromagnetic plate (5) in a detachable manner, is brought into contact with the ferromagnetic plate (2) in a detachable manner. A pull-out prevention cylinder (8) made of a non-magnetic material and having a high frictional resistance is inserted into the magnet hole (1) a and is removably fitted and engaged with the ferromagnetic rod (6). A retainer characterized by being tightly fitted.