KR20100003687A

KR20100003687A - Magnetic fastener module

Info

Publication number: KR20100003687A
Application number: KR1020090006283A
Authority: KR
Inventors: 조한중
Original assignee: 조한중
Priority date: 2008-07-01
Filing date: 2009-01-23
Publication date: 2010-01-11

Abstract

The present invention relates to a magnetic fastener module, and an object of the present invention is to provide a magnetic fastener module having improved coupling force such that the magnetic force line leakage of the permanent magnet is reduced and the coupling is not released by an unintended external force.

Magnetic fastener module of the present invention for achieving the above object, the first fastener made of a ferromagnetic material; A second fastener made of a ferromagnetic material provided to face the first fastener; And a plurality of permanent magnets disposed in at least one side of the first fastener and the second fastener that face each other and provided at positions spaced apart from each other by the pair of the first fastener and the second fastener. The magnetic circuit by the permanent magnet is formed through the first fastener and the second fastener and is configured to reduce magnetic flux lines leaking to the outside.

Description

Magnetic Fastener Module {MAGNETIC FASTENER MODULE}

The present invention relates to a magnetic fastener module, and more particularly to a magnetic fastener module that can provide a more improved coupling force by reducing the magnetic force line leakage of the permanent magnet.

In general, a permanent magnet is a material that retains magnetism once magnetized, and continues to form a magnetic field without a separate energy supply such as an electric current. Magnetic fasteners have been utilized in various products to easily combine and detach two members as necessary by using the properties of these permanent magnets. 1 shows an example of using a magnetic fastener as a bag lock.

As shown, the conventional magnetic fastener is arm fastener 21 is coupled to the front of the main body portion of the bag (A), the permanent magnet 21a is provided in the groove provided in the center of the arm fastener 21, The male fastener 22 is coupled to the back of the cover part of the bag A, and the coupling protrusion 23 is formed at the center of the male fastener 22. The female fastener 21 and the male fastener 22 are made of a ferromagnetic material or a nonmagnetic material, and the coupling protrusion 23 is made of a ferromagnetic material.

In the conventional fastener, the male fastener 22 approaches the female fastener 21 so that the engaging protrusion 23 is inserted into the groove of the female fastener 21 by the magnetic attraction of the permanent magnet 21a. The locking force of the bag can be locked by applying a force of a predetermined size or more, and the male fastener 22 is separated from the female fastener 21 so that the bag can be easily opened.

However, the above-described conventional magnetic fasteners have a structure in which the permanent magnets 21a are exposed to the outside, so that the magnetic force lines leaking to the outside are weak, and thus the coupling force is weakened. The female fastener 21 and the male fastener 22 are easily separated and there is a problem that the lock is released.

In addition, since the conventional magnetic fasteners have a structure in which accurate coupling is achieved only by inserting the coupling protrusion 23 of the male fastener 22 into the groove of the female fastener 21 to be in contact with the permanent magnet 21a, the user is required to engage the coupling. There is a problem that causes the inconvenience, the coupling protrusion 23 is badly coupled in a state that is attached to the outside of the groove of the female fastener 21 is undesirably unlocked.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a magnetic fastener module having improved coupling force such that the magnetic force line leakage of the permanent magnet is reduced and the coupling is not released by an unintended external force.

In addition, the present invention is to provide a magnetic fastener module that is easy to use and prevent unwanted unlocking while the two fasteners are aligned to the correct position automatically by mutual magnetic attraction when the two fasteners are close to each other. have.

The present invention for achieving the above object, the first fastener made of a ferromagnetic material; A second fastener made of a ferromagnetic material provided to face the first fastener; And a plurality of permanent magnets disposed in at least one side of the first fastener and the second fastener that face each other and provided at positions spaced apart from each other by the pair of the first fastener and the second fastener. The magnetic circuit by the permanent magnet is formed through the first fastener and the second fastener to provide a magnetic fastener module characterized in that to reduce the magnetic flux lines leaking to the outside.

In the magnetic fastener module of the present invention, a pair of permanent magnets are provided on only one side of the first fastener and the second fastener, and the distance between both permanent magnets mounted on one fastener is closer to the first fastener and the second fastener. It is preferable that the distance be greater than the distance between the permanent magnet and the other fastener.

In some cases, each of the first fastener and the second fastener is provided with a pair of permanent magnets facing each other, and the permanent magnets facing each other are disposed in a direction in which mutual attraction is applied, and the pair of permanent fasteners mounted on each fastener is formed. The distance between the magnets may be configured to be larger than the distance between the permanent magnets facing each other in the proximity of the first fastener and the second fastener.

Preferably, at least one side of the first fastener and the second fastener may be provided with a cover made of a nonmagnetic material to prevent the mounted permanent magnets from directly contacting the other side.

In addition, one side of the first fastener and the second fastener may be provided with a display containing a predetermined visual content, and the other side of the first fastener and the second fastener may have a display window for exposing the display to the outside.

In this case, the display is inserted into the display window is preferably provided in a three-dimensional shape to be exposed to the outside.

In some cases, one side of the first fastener and the second fastener is provided with a coupling hole protruding in a predetermined shape, the other side is formed with a coupling hole into which the coupling hole is inserted, the predetermined visual content outside the coupling hole It may be made of a structure provided with the display.

According to the magnetic fastener module of the present invention as described above has the following advantages.

(1) By having a pair of permanent magnets in a fastener made of ferromagnetic material to form a magnetic circuit to shield the leakage of magnetic force lines, a stronger magnetic force is formed on the main magnetic force surface so that the locking state of the locking device is stably maintained. This has the effect of improving product reliability.

(2) Each pair of fasteners are provided with a pair of permanent magnets so that both fasteners are automatically aligned and aligned in the correct position by the attraction between permanent magnets facing each other. There is an effect to improve the ease of use.

(3) By allowing the display material provided on one fastener to be exposed to the outside through the display window of the other fastener, the product appearance quality can be improved and the abnormality of the locked state can be easily confirmed. In particular, the display material is inserted into the display window so that the coupling positions of both sides are aligned and maintained, whereby the locking can be more accurately and easily achieved.

(4) The fasteners provided on one fastener are inserted into the fastening holes of the other fasteners, and various design marks are attached to the outside thereof, so that the appearance quality of the product can be improved, but the fastening between the fasteners is accurate and robust. There is an effect that can be made.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a first embodiment of a magnetic fastener module according to the present invention, Figure 3 is a cross-sectional view showing an operating state of the fastener module shown in FIG.

As shown, the fastener module 100 of the present invention includes a first fastener 120 and a second fastener 140 made of a ferromagnetic material, and a pair of permanent magnets 150a, which are bonded to the second fastener 140. 150b) and a first cover 110 and a second cover 130 provided to surround the outside of the first fastener 120 and the second fastener 140, respectively.

The first and second fasteners 120 and 140 may be made of a metal material having ferromagnetic properties, such as iron, and the shape may be variously formed according to the use as well as the illustrated plate shape. The first and second fasteners 120 and 140 form magnetic circuits that absorb and shield magnetic field lines by both permanent magnets 150a and 150b when they are close to each other, as shown in FIG. In addition, the magnetic circuit has a structure to reduce the amount of magnetic flux leaking to the outside. Therefore, the optimum magnetic attraction can be applied to the surfaces of the permanent magnets 150a and 150b and the main magnetic force surface formed by the first fastener 120.

The permanent magnets 150a and 150b are installed on the front surface of the second fastener 140 to face the first fastener 120 between the first cover 110 and the formulation 2 cover 130. Both permanent magnets (150a, 150b) are coupled to be spaced apart from each other at a predetermined interval (D), this gap (D) is in contact with the first cover 110 and the second cover 130 as shown in (b) of FIG. Distance between the surfaces of the permanent magnets 150a and 150b and the surface of the first fastener 120 when the first fastener 120 and the second fastener 140 are positioned close to each other. It is desirable to form.

That is, the separation distance D between the permanent magnet 150a and the neighboring permanent magnet 150b is greater than the separation distance d between the permanent magnets 150a and 150b and the first fastener 120. This means that when the separation distance D between the permanent magnets 150a and 150b becomes smaller than the separation distance d between the permanent magnets 150a and 150b and the first fastener 120, the permanent magnets adjacent to the permanent magnets 150a of the one side are permanent. This is because a portion of the magnetic force line flows to the magnet 150b side, so a magnetic force line loss occurs, thereby weakening the coupling force caused by the magnet.

The first cover 110 and the second cover 130 is made of a non-magnetic material of a variety of materials, such as synthetic resin, cloth, leather, may be provided as a separate member in the form of a sheet or plate, integrated by insert injection or coating, etc. It may be provided in the form.

The first cover 110 and the second cover 130 to maintain the distance (d) between the permanent magnets (150a, 150b) and the first fastener 120 when the coupling operation of the fastener module 100 is made, It is to prevent the damage and breakage of the permanent magnets (150a, 150b) by mitigating the impact of the coupling. Its shape may be variously formed according to the shape of the first and second fasteners (120, 140), in the illustrated embodiment is formed in the form of a flat cube surrounding the first fastener 120 and the second fastener (140) Illustrated.

Meanwhile, in the illustrated embodiment, the first cover 110 and the second cover 130 are illustrated to surround the entire exterior of the first and second fasteners 120 and 140, respectively, but are limited thereto. The first cover is formed in such a manner as to cover some or all of the opposing surfaces of the first fastener 120 and the second fastener 140 so that the second fastener 140 and the permanent magnets 150a and 150b are spaced apart from each other. 110 and the second cover 130 may be provided.

The magnetic fastener module of the present invention configured as described above forms a magnetic circuit by the first fastener 120, the second fastener 140, and a pair of permanent magnets 150a and 150b. This has a shielding structure in which the leakage magnetic flux to the outside is reduced. As such, the reduction of the magnetic force lines leaking to the outside may improve the coupling force of the locking device using the same.

Figure 4 is an illustration for comparing the structure of the fastener module according to the present invention and the magnetic coupling force of the prior art. 4 (a) shows a condition for obtaining a magnetic flux density B in the case of a cylindrical magnet, FIG. 4 (b) shows the structure of a conventional magnet fastener, and FIG. 4 (c) It shows a structure of a fastener module according to the present invention.

FIG. 4 (a) shows conditions for obtaining a magnetic flux density B (X) at a distance X (mm) from one surface of a cylindrical permanent magnet having a diameter of 2R and a length of L. FIG. Referring to (a) and (b) of, the coupling force (F) generated between the two permanent magnets exposed to the outside is

F (adsorption force) = B ² S / 2μ ₀ (N)

Where B is the magnetic flux density, S is the cross-sectional area, and μ ₀ is the vacuum permeability (4π × 10 ⁻⁷ ).

And B is calculated | required by the following formula. In other words,

Is obtained, wherein Br = 12,000 G = 1.2 T, and has the condition of R = 10, L = 1, X = 1.

Therefore, when B is obtained by referring to the above equation, B (G) = 1,052 Gauss (Gauss at point C).

Then, the coupling force F = B ² S / by 2μ (N), F = { (1052/10000) 2 x 3.14 x (10/2/1000) 2} / (2 x 4 x 3.14 x 10 -7) = 1.382 N.

Meanwhile, referring to FIGS. 4A and 4C, the fastener module according to the present invention forms a magnetic circuit, and the coupling force F is obtained under the same conditions as those of FIG. 4B. .

The structure of the fastener module according to the present invention is applied to the principle of the electric image that the opposite stimulus, the image stimulus of the same size is present in the fastener, that is, symmetrical with respect to the ferromagnetic material.

Therefore, when the magnetic flux density B by the first fastener and the magnetic flux density B by the second fastener are obtained by the electric imaging principle, B (G) = 1,910 Gauss and B (G) = 1,052 Gauss, respectively.

Here, the magnetic flux density at the point d by the first fastener and the second fastener is represented by the average of these two values, and B (G) = (1910 + 1052) / 2 = 1481 Gauss.

Then, the coupling force F = B ² S / by 2μ (N), F = { (1481/10000) 2 x 3.14 x (10/2/1000) 2} / (2 x 4 x 3.14 x 10 -7) = 2.741 N x2 = 5.482 N

Looking at the results, it can be seen that the coupling force in the magnetic circuit structure of the magnetic fastener module according to the present invention is about 3 to 5 times stronger than the coupling force in the conventional magnetic fastener structure.

On the other hand, Figure 5 illustrates that the fastener module 100 of the first embodiment is applied as a locking device of the bag, the first fastener 120 is provided in front of the body portion of the bag, the corresponding of the bag The second fastener 140 is provided behind the cover part.

6 and 7 are perspective views illustrating the second embodiment of the fastener module according to the present invention as being applied to the locking device of the case-type product, and FIG. 8 is a sectional view showing the fastener module of the second embodiment, and FIG. 9 Denotes a magnetic circuit formed in the structure of the second embodiment.

The fastener module 100 of the illustrated second embodiment is also provided with a first fastener 120 and a second fastener 140 facing each other in the same manner as the above-described embodiment, and the first fastener 120 and the second fastener ( 140) a pair of permanent magnets (150a, 150b, 150c, 150d) is mounted on each. Permanent magnets positioned to face each other among the permanent magnets 150a, 150b, 150c, and 150d are disposed in a direction in which attraction force is applied to each other. In addition, the distance (D) between the pair of permanent magnets (150a, 150b, 150c, 150d) mounted on each of the first fastener 120 and the second fastener 140 is the first fastener 120 and the second fastener. In the proximity of 140, the distance between the permanent magnets 150a, 150b, 150c, and 150d facing each other is greater than that.

Similarly to the first embodiment described above, the structure of the second embodiment forms a magnetic circuit as shown in FIG. 9 to shield magnetic leakage, and in particular, the permanent magnets 150a, 150b) and the mutual attraction between the permanent magnets (150c, 150d) provided in the second fasteners (120, 140), so that the first fastener 120 and the second fastener 140 close to the user without special attention Simply by pulling the corresponding permanent magnets to each other is automatically made in the correct position. Accordingly, the usability of the locking device using the same is improved, and there is an advantage of always maintaining a stable locking state.

The fastener module 100 is at least one side of the first fastener 120 and the second fastener 140 is embedded in the product itself to be mounted or installed on the inner surface of the product is a part of the product is provided between the permanent magnet It may be configured to function as a nonmagnetic cover. In this case, since there is no need to include a cover on the fastener itself as in the first embodiment described above, there is an advantage that the manufacturing cost can be reduced.

In the illustrated embodiment, the first fastener 120 is embedded in the front portion 111 forming the main body 10 of the case type product, and the front portion 111 is provided in front of the permanent magnets 150a and 150b. Illustrated to be configured to function as the first cover.

On the other hand, the second fastener 140 has a second cover 131 formed by coating a synthetic resin on the front of the permanent magnets (150c, 150d) is provided.

The fastener module 100 is coupled to a display material 121 containing various contents, such as a product logo, on the first fastener 120, and a second fastener so that the display material 121 may be exposed to the outside when the fastening module 100 is locked. The display window 141 is formed on the 140.

The indicator 121 may be coupled in various ways. For example, in the second embodiment, a coupling protrusion 122 is provided at a rear portion of the indicator 121, and the coupling protrusion 122 is formed on the front surface of the product. A structure in which the fastener 123 is fastened through the portion 111 and the first fastener 120 is illustrated.

As another example, as shown in the third embodiment of the present invention shown in FIG. 10, the display 121 may be bonded to the front portion 111 of the product having the first fastener 120 embedded therein. .

The display window 141 may be formed of a simple hole or may have a structure in which a transparent film or plate is installed in the hole.

The configuration of the second embodiment can display various contents through the display window 141 to improve the aesthetics of the product, and also according to the exposure form of the display 121, the first fastener 120 and the second. It is possible to check whether the fastening of the fastener 140 is properly performed.

The display 121 may be formed in a three-dimensional shape having an external shape corresponding to the display window 141 and a predetermined thickness. This configuration has the advantage that the lock can be made more accurately and easily since the display 121 is aligned and maintained as the display 121 is inserted into the display window 141 when the product is locked.

FIG. 11 shows a fourth embodiment of the present invention, which is similar to the above-described second embodiment, in which a pair of permanent magnets 150a, 150b, respectively, is formed in the first fastener 120 and the second fastener 140, respectively. 150c and 150d are provided, and the coupling fasteners 125 protruding forward are provided in the front portion 111 of the product in which the first fasteners 120 are embedded, and the coupling holes in the second fasteners 140. The coupling hole 141 is formed in a shape corresponding to the 125, and the display 121 is mounted to block the outside of the coupling hole 141.

The configuration of the fourth embodiment can be attached to the display 121 of a variety of designs to improve the aesthetics of the product, and at the same time the coupling fastener when the first fastener 120 and the second fastener 140 As the 125 is inserted into the coupling hole 141, there is an advantage that the accurate and solid coupling is made.

1 is a perspective view showing a conventional magnetic fastener applied to a bag.

2 is a perspective view showing a first embodiment of a magnetic fastener module according to the present invention.

3 is a cross-sectional view showing an operating state of the fastener module shown in FIG.

Figure 4 is an exemplary view for comparison between the magnetic fastener module according to the present invention and the magnetic fastener according to the prior art.

FIG. 5 is a perspective view illustrating that the fastener module of the first embodiment shown in FIG. 2 is applied as a locking device of a bag.

6 and 7 are perspective views showing the second embodiment of the magnetic fastener module according to the present invention applied to the lock of the case-type product.

8 is a cross-sectional view illustrating the fastener module shown in FIGS. 6 and 7.

Fig. 9 schematically shows a magnetic circuit formed in the structure of the second embodiment.

10 is a cross-sectional view showing a third embodiment of the magnetic fastener module according to the present invention.

11 is a cross-sectional view showing a fourth embodiment of the magnetic fastener module according to the present invention.

※ Explanation of symbols for main parts of drawing

100: fastener module 110: first cover

120: first fastener 121: display material

130: second cover 140: second fastener

141: display window 150a, 150b, 150c, 150d: permanent magnet

Claims

A first fastener made of ferromagnetic material;

A second fastener made of a ferromagnetic material provided to face the first fastener; And

Including a plurality of permanent magnets provided in a position spaced at a predetermined interval in pairs on at least one side of the first fastener and the second fastener facing each other,

When the first fastener and the second fastener are close to each other, the magnetic circuit by the permanent magnet is formed through the first fastener and the second fastener to reduce the magnetic flux lines leaking to the outside.

The method of claim 1,

A pair of permanent magnets are provided on only one side of the first fastener and the second fastener, and the distance between both permanent magnets provided in one fastener is greater than the distance between the permanent magnet and the other fastener when the first fastener and the second fastener are in close proximity. Magnetic fastener module, characterized in that arranged.

The method of claim 1,

A pair of permanent magnets are provided in the first fastener and the second fastener to face each other, and the permanent magnets facing each other are disposed in a direction in which mutual attraction is applied, and the distance between the pair of permanent magnets provided in each fastener. Magnetic fastener module is characterized in that disposed closer than the distance between the permanent magnet facing each other when the first fastener and the second fastener in close proximity.

The method of claim 1,

At least one side of the first fastener and the second fastener is a magnetic fastener module, characterized in that the cover is made of a non-magnetic material to prevent the mounted permanent magnet is in direct contact with the other side.

The method according to any one of claims 1 to 4,

One side of the first fastener and the second fastener is provided with a display containing a predetermined visual content, the other side is a magnetic fastener module, characterized in that the display is provided with the display is exposed to the outside.

The method of claim 5,

The display member is inserted into the display window is a magnetic fastener module, characterized in that provided in a three-dimensional shape to be exposed to the outside.

The method according to any one of claims 1 to 4,

One side of the first fastener and the second fastener is provided with a protruding coupling hole, the other side is formed with a coupling hole for inserting the coupling hole, the outer side of the coupling hole is provided with a display containing a predetermined visual content Magnetic fastener module characterized by.