JPH038085B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in an engaging tool using a permanent magnet, and more specifically, it can be made small and lightweight;
The present invention also relates to an engagement tool that can prevent engagement from being released due to unforeseen impacts or the like.

[Prior Art] Conventionally, this type of engagement tool has been formed of an attracting tool having a permanent magnet attached with a ferromagnetic member, and an attracting tool having a ferromagnetic protrusion facing the ferromagnetic member. The ferromagnetic protrusion is attracted to the ferromagnetic member in a hole provided in the center of the permanent magnet, and the main attraction force causes the attraction tool and the attraction target to be removably attracted to each other. It is composed of

[Problems to be Solved by the Invention] As described above, the conventional engagement tool is effectively attracted by the high-density magnetic attraction force acting between the ferromagnetic protrusion and the ferromagnetic member. However, the magnetic attraction force decreases rapidly when the attraction surfaces are separated, and as a matter of course, permanent magnets require an attraction force above a certain limit, and for this reason, conventional engagement tools However, magnets cannot be made smaller or lighter than a certain level, and depending on the application, rubber magnets or plastic magnets, which have a weak magnetic attraction force, cannot be used. However, even in this case,
If an unexpected impact is applied to the engagement tool, the suction surfaces are separated and the engagement is immediately released.

[Means for Solving the Problems] Therefore, an object of the present invention is to provide an inexpensive engagement that can be made small and lightweight, and that will not be disengaged even if an unexpected impact is applied. In order to achieve this object, the engaging tool of the present invention has a magnetic pole surface of a permanent magnet 1 having a hole 1e extending from one magnetic pole surface 1b to the other magnetic pole surface 1a. A ferromagnetic plate 3 attached to 1a or a ferromagnetic protrusion 4 protruding from the plate 3, and the magnetic pole face 1b
In an engagement tool in which a ferromagnetic protrusion 12 protruding from a ferromagnetic plate 11 that is in contact with a ferromagnetic plate 11 is removably attracted in the hole 1e, at least the magnetic pole surface 1b and the outer circumferential surface of the permanent magnet 1. 1c is folded into the hole 1e to form a short cylindrical collar 2a, and the top of the ferromagnetic protrusion 12 is laterally expanded in diameter to form a swollen protrusion. Tsuba 12
a, and the hole diameter of the flange 2a is slightly larger than that of the flange 12a of the protrusion 12.

In this way, by once engaging the attracting tool with the attracting tool when the engagement is released, the necessary attraction force of the permanent magnet can be made extremely small.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, the engaging tool consists of a suction tool A and a to-be-adsorbed tool B. The magnetic protrusion 4 and the ferromagnetic protrusion 12 protruding from the ferromagnetic plate 11 forming the attracted tool B,
It is configured to be detachably attracted within a hole 1 provided in the center of the magnet 1.

Here, the non-magnetic case 2 that covers the magnetic pole surface 1b and the outer peripheral side surface 1c of the magnet 1 is folded into the magnet hole 1e to form a short cylindrical collar 1a having an inner diameter _D1 , and the above-mentioned strong The top of the magnetic protrusion 12 is laterally expanded in diameter to form a flange 12a having a swollen outer diameter _D2 , and the inner diameter _D1 is set to a value slightly larger than the outer diameter _D2 . There is. In addition, 5,13
1 is a fixed leg, and 6 and 14 are seats.

In such a configuration, the lid 21 of the bag is now
When the suction tool A is attached to the main body 22 of the bag, as shown in FIG.
The contact a is attracted to the center of the contact surface of the protrusion 4, and the lid 21 and the main body 22 are engaged by a high-density magnetic attraction force F acting therebetween. In this state, the ferromagnetic plate 11 is in contact with the case 2, and the weak attractive force f acting between the collar 12a and the magnetic pole face 1b is balanced.

When the lid 21 is released, the lid 21 is pulled upward in the x direction, and as a result, as shown in FIG. The attractive force f' between the raised side of the case 2 and the magnetic pole face 1b increases, and at the same time, the attractive force F' between the spaced protrusions 12 and 4 decreases rapidly, and the plate 11 By sliding the upper part in the direction of arrow Y, the one side surface of the collar 12a is attracted to the inner circumferential side surface 1d of the magnet 1, the collar 12a is engaged with the collar 2a of the case 2, and the release operation of the engagement tool is temporarily stopped. Interrupted.
Next, when the lid 21 is further pulled strongly from this state, the flange 12a slides along the sliding curved surface 12a' in the direction of arrow Z, as shown in FIG.
The relationship between the tsuba 2a and the tsuba 2a is released. As a result, the engagement between the suction target tool B and the suction tool A is released, and the lid 21
is released from the main body 22.

In this way, during the opening operation of the lid 21, the flange 12
Since a is always attached to the flange 2a, even if the magnetic attraction is accidentally released due to weak attraction of the permanent magnet 1 due to an unexpected shock, etc. There is no possibility that the lid 21 will be released. Moreover, once the influence of impact etc. is gone, there is no force acting on the lid 21 to release it, so the suction tool B and the suction tool A
and are again attracted and engaged to their original state. here,
Since the collar 2a is formed into an annular shape using the case 2, the cost is low and the collar 2a is strong.

The magnitude of the force for releasing the engagement between the collar 12a and the collar 2a can be adjusted by appropriately selecting the shape of the sliding curved surface 12a'. In addition, the fifth
As shown in the figure, a sliding curved surface 2a' may be formed on the collar 2a. Furthermore, although the plating on the sliding curved surface may be damaged during sliding, it does not spoil the appearance because it is located inside the collar 12 and is not exposed.

Further, the size of the protrusion 4 can be selected to be an appropriate height h 1 , _{h 2} for manufacturing purposes, corresponding to the height H ₁ , H ₂ of the magnet 1, as shown in FIGS. 6a and 6b. However, as shown in Figure 6e, the height of magnet 1 is
If H ₃ is made extremely small, the protrusion can be omitted. Furthermore, it goes without saying that the protrusion 12 may have an outer diameter the same as the aforementioned outer diameter _D2 , and the collar 12a may be formed by cutting a groove or the like.

As explained above, the engaging tool of the present invention prevents the engagement from being accidentally released even if the attractive force of the magnet is extremely small, making the magnet and therefore the engaging tool extremely small and lightweight. At the same time, magnets with weak magnetic attractive force such as rubber magnets and plastic magnets can be used without any problems.

Moreover, since the magnitude of the locking force caused by the above-mentioned locking can be set appropriately, it can be suitably used as a snap-locking tool for shoes, a hook-locking tool for clothes, etc. in addition to the bag mentioned above. Of course, as will be described later, it can be used in a wide range of applications, such as a locking tool for a wall hanger or a chain connector for a necklace.

Next, FIG. 7 shows the permanent magnet 1 and the fixed leg 5,
13, but in FIG. 7a, the magnet 1
A ferromagnetic plate 7 is interposed between the case 2 and the case 2,
In FIG. 7b, the peripheral edge of the case 2 in FIG. 7a is raised to form an annular protruding edge 2b, and in FIG. 7c, the ferromagnetic plate 7 in FIG. 7b is omitted. In this way, when the ferromagnetic plates 7 are interposed,
Lines of magnetic force protruding from the outside of the suction device are shielded, and the raised annular protrusion 2b prevents the edge of the cash card or the like from coming into contact with the upper surface of the case 2. This prevents adverse effects on magnetic recording in cash cards and the like. In addition, 5a,
Reference numeral 13a indicates a leg fixed with a wood screw, 5b, 13b indicates a leg fixed with a pin, and 5c, 13c indicates a leg fixed with a bolt.

Next, FIG. 8 shows still another embodiment of the fastening legs 5, 13, and FIG. 8a shows the caulking pipes 5a', 13.
a', Fig. 8b is the bottomed caulked pipe 5b', 13
b' and FIG. 8c show caulked pipes 5c' and 13c' which are integrally formed by wrapping the peripheral edge of a mounting washer around the enlarged end of a cylindrical tube. In addition, Figure 8a
In this case, the contact surfaces of the case 2 and the ferromagnetic plate 11 are formed into spherical shapes, and the suction target B can be smoothly engaged.

Next, in FIG.
A hook 15 is integrally caulked to the suction target B by a protrusion 12. When the hanger is used, as shown in FIG. 10a, the lower side surface of the collar 12a is attracted to the inner peripheral side surface 1d of the magnet 1, and the contact surfaces of the collar 12a and the protrusion 4 are attracted to each other. Tool B is engaged with suction tool A. Here, when the hook 15 is pulled in the direction of the arrow X' due to an impact or the like, the collar 12a
The abutting surfaces of the protrusion 4 and the protrusion 4 are separated, the magnetic attraction force is rapidly reduced, and the engagement of the engagement tool is about to be released. At this time, as shown in FIG. 10b, the flange 12
The lower side surface of a is engaged with the collar 12a of the case 2 while sliding on the circumferential side surface 1d, and release of the engagement is prevented. In this way, a small magnetic engagement tool with a small attraction force can be suitably used as an engagement tool for a heavy object hanger.

Next, in FIG. 11, connecting arms 10 and 16 are attached to suction tool A and suction target B, and are connected to chains 17 and 17, respectively. Here, since the engaging tool is formed to be extremely small and lightweight, it can be used as a chain engaging tool such as a necklace and has an extremely good appearance.

[Effects of the Invention] As explained above, in the engaging tool of the present invention, the magnet case of the attracting tool is folded into the magnet hole to form a short cylindrical collar, and the magnet case is inserted into the magnet hole by suction. By forming the top of the ferromagnetic protrusion of the attracting device into a swollen flange, the ferromagnetic protrusion is configured such that the flange is always once engaged with the flange during the releasing operation of the engaging device. , even if the magnetic attraction is accidentally released due to an unexpected impact, or if the attraction decreases due to sliding sideways even if it is in a magnetically attracted state, the engaging tool This has the effect of reliably preventing the engagement from being released.

Therefore, the engaging tool can be made extremely small and lightweight, and at the same time, magnets with small attractive force such as rubber magnets and plastic magnets can be used without any problem. Moreover, since the magnitude of the locking force due to the locking mentioned above can be set as appropriate,
Not only is it suitable for a wide variety of engagement tools used for bags, shoes, clothes, etc., but it also has the effect of being able to be used in a wide range of other applications, such as wall hangers and netless chain engagement tools. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the engaging tool of the present invention, FIG. 2 is a vertical cross-sectional view showing the suction state of the suction target B and suction tool A of FIG. 1, and FIG. 3 is the same. A vertical cross-sectional view showing a state in which suction target B and suction tool A are engaged, FIG. 4 is a detailed view of part A in FIG. 3, and FIG. 5 is a detailed view of another embodiment corresponding to FIG. 4. , Figure 6 a, b,
c, Figure 7 a, b, c, Figure 8 a, b, c are the first
FIG. 9 is an explanatory view of an embodiment in which the engaging tool of the present invention is used as a wall hanger, and FIG. FIG. 11 is a vertical cross-sectional view showing the suction state and engagement state of tool A and suction target tool B, and is an explanatory diagram of an embodiment in which the engaging tool of the present invention is used for joining a chain or the like. 1...Permanent magnet, 1a, 1b...Magnetic pole surface, 1c
...outer circumferential side, 1d...inner circumferential side, 1e...hole,
2... Case, 2a... Tsuba, 11... Ferromagnetic plate,
4, 12... ferromagnetic protrusion, 5, 13... fixed leg,
6, 14... catch seat, A... suction tool, B... suction target tool.

Claims (1)

[Claims] 1. The magnetic pole surface 1a of the permanent magnet 1 having a hole 1e extending from one magnetic pole surface 1b to the other magnetic pole surface 1a.
The ferromagnetic plate 3 attached to the ferromagnetic plate 3 or the ferromagnetic protrusion 4 protruding from the plate 3, and the ferromagnetic protrusion 12 protruding from the ferromagnetic plate 11 abutting the magnetic pole face 1b,
In the engagement tool detachably attracted in the hole 1e, a non-magnetic case 2 that covers at least the magnetic pole surface 1b and the outer peripheral side surface 1c of the permanent magnet 1 is attached to the hole 1e.
The ferromagnetic protrusion 12 is folded inward to form a short cylindrical flange 2a, and the diameter of the top of the ferromagnetic protrusion 12 is expanded laterally to form a swollen flange 12a. An engagement tool characterized in that the hole diameter is slightly larger than the flange 12a of the projection 12.