JPH0960390A - Magnet catch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attract an open and close member and close definitely. SOLUTION: A magnet catch 10 includes a cylinder-shaped housing 12 whose both ends are open. A base plate 14 is housed inside the housing 12 and supported on a non-slip preventive claw 12a. A cushioning material 18 is laid out on the base plate 14 while a support member 20 is laid out on the cushioning material 18. A magnet 22 is housed on the support member 20 in such a fashion that it may roll. This magnet 22 includes a substantially sphere-shaped yoke 24. A small recessed area 26 is formed on the end face opposed to the support member 20 of the yoke 24 where the recessed area 26 is a small dent to fit in a projection 20b of the support member 20. Furthermore, on the end face opposed to the small recessed area 26 there is formed a flat contact surface 28. A board-like magnet 32 having a specified thickness is housed in a housing groove 30 of the yolk 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet catch, and more particularly, to a magnetic catch attached to a joint between an opening / closing member such as an upper lid of a copying machine or a door of furniture and a main body, and attached to the opening / closing member. The present invention relates to a magnet catch that is used when magnetically attracted and closed.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view showing a usage state of a conventional magnet catch which is a background of the present invention. As shown in FIG. 9, the magnet catch 1 is provided so as to be embedded in a position facing an upper corner of a door b of a main body a of furniture such as a cabinet that opens in a double door. At the upper corner of the door b, a suction piece c made of a magnetic material such as iron is fixed so as to face the contact surface of the magnet catch 1 when the door b is closed. Therefore, when the door b is closed, the magnet catch 1
The abutting surface and the attraction piece c are in surface contact with each other, and the attraction force of the attraction piece c is attracted by the magnetic force of the magnet catch 1, whereby the door b is closed to the main body a of the furniture.

FIG. 10 is a perspective view showing an example of a conventional magnet catch, and FIG. 11 is a sectional view taken along the line XI-XI. The magnet catch 1 includes a cylindrical housing 2 having a bottom. An opening for bulging the magnet body 3 is formed at one end of the housing 2, and a flange portion 2a is formed at the periphery thereof. One end surface of the magnet body 3 bulging from the opening becomes a contact surface for making surface contact with the attraction piece c and attracting the attraction piece c. A screw thread 2b is spirally formed on the outer surface of the housing 2, and a rod-shaped male screw 2 is formed on the other end of the housing 2.
c is integrally formed. These screw threads 2b and male threads 2c are for fixing the magnet catch 1 by screwing it into the body a of the furniture. A substantially cylindrical magnet body 3 is fixedly housed inside the housing 2. As shown in FIG.
Is a plate-like magnet 3 having a rectangular cross section with a predetermined thickness.
Including a. The magnet 3a is sandwiched by a pair of yokes 3b and 3c each having an arcuate cross section. York 3
b and 3c are fixed to the inner wall surface of the housing 2.

FIG. 12 is a perspective view showing another example of a conventional magnet catch, and FIG. 13 is its line XII.
It is sectional drawing in I-XIII. The magnet catch 1'includes a cylindrical housing 2 having a bottom. A flange portion 2a is formed on the periphery of the opening at one end of the housing 2. In this case, the housing 2 is pressed into a desired position of the main body a such as furniture, and the flange 2
By fixing a to the main body a, the magnet catch 1 is fixed to the main body a such as furniture. Further, the retaining hook 2d is integrally formed so as to protrude from the flange portion 2a toward the center of the opening. The retaining hook 2d is for preventing the magnet body 3 from coming out of the housing 2.

A substantially cylindrical magnet body 3 is housed inside the housing 2 in a displaceable manner. That is, the length of the magnet body 3 is formed to be shorter than the depth inside the housing 2 for housing the magnet body 3, and the diameter of the magnet body 3 is formed to be slightly smaller than the inner diameter of the housing 2.
The magnet body 3 also includes a plate-shaped magnet 3a having a rectangular cross section and having a predetermined wall thickness. The magnet 3a is sandwiched by a pair of yokes 3b and 3c each having an arcuate cross section. A shoulder portion 4 having an L-shaped cross section is formed on the outer surfaces of the yokes 3b and 3c so that the magnet body 3 is caught by the retaining hook 2d in order to prevent the magnet body 3 from coming out of the housing 2.

At the other end of the magnet body 3 inside the housing 2, a cushion material 5 made of an elastic material such as sponge is housed. The cushion member 5 urges the magnet body 3 toward the opening of the housing 2. Therefore, the shock when the magnet body 3 is pushed toward the inside of the housing 2 is absorbed by the cushion material 5, and so-called rough closing of the door b is prevented. Further, thereafter, the restoring force of the cushion material 5 can return the magnet body 3 to the original position.

Further, FIG. 14 is a sectional view showing still another example of the conventional magnet catch. This magnet catch 1 ″ has a structure similar to that shown in FIG. 12, but differs in the retaining mechanism. That is, the inner side wall of the housing 2 of this magnet catch 1 ″ has a U-shaped cross section. 6 is formed. The length of the recess 6 is slightly longer so that the magnet body 3 can be displaced in the longitudinal direction of the housing 2. A protrusion 7 having a triangular cross section is formed on the outer surfaces of the yokes 3b and 3c so as to be caught in the recess 6 in order to prevent the magnet body 3 from coming out of the housing 2. The magnet body 3 is displaced with respect to the housing 2 within a range in which the protrusion 7 can be displaced in the recess 6 in the longitudinal direction.

[0008]

However, if the door b is distorted or deformed, or if the mounting portion between the door b and the main body a of the furniture is misaligned, loose, or deformed, the door b
May not close in parallel to the main body a. Further, even if the door b is closed parallel to the main body a, the attachment of the magnet catch may be distorted.
This also applies to the relationship between the upper lid and the main body of a copying machine or the like.

However, in the magnet catch 1 shown in FIGS. 10 and 11, the magnet body 3 is fixedly provided to the housing 2 and the main body a such as furniture in which the magnet body 3 is embedded. Therefore, in the above case, the attraction piece c comes into contact with the contact surface of the magnet body 3 obliquely, and the contact surface of the magnet body 3 and the attraction piece c do not come into surface contact with each other. Therefore, the suction piece c cannot be sufficiently sucked, and the door b cannot be closed.
Similarly, the magnet catch 1'shown in FIGS.
And 1 ″, the magnet body 3 slightly moves diagonally by the distance between the magnet body 3 and the housing 2, but cannot follow the inclination of the attraction piece c of the door b that does not close in parallel,
The end face of the magnet body 3 and the attraction piece c do not come into surface contact with each other. Therefore, the suction piece c cannot be sufficiently sucked, and the door b cannot be closed.

Therefore, a main object of the present invention is to provide a magnet catch capable of adsorbing a member to be opened and closed and securely closing it.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a magnet body having a flat contact surface at one end and a spherical surface connected to the contact surface at a side surface, and at least one end having a maximum diameter of the magnet body And a housing for rotatably accommodating the magnet body while bulging the contact surface of the magnet body while bulging the contact surface of the magnet body, and a magnet in the housing. It is housed on the side opposite to the contact surface of the body, supports the other end of the magnet body, and prevents the contact surface from entering the housing when the magnet body rolls, A magnetic catch including a support member for limiting.

Further, the supporting member includes a substrate having a diameter at least smaller than the inner diameter of the housing, and a protrusion provided so as to protrude from the surface of the substrate, and the protrusion is provided at the other end of the magnet body. Corresponding small depressions may be formed and the tips of the protrusions may be fitted into the small depressions.

Further, the supporting member includes a substrate having a diameter smaller than at least the inner diameter of the housing, and a recess formed on the surface of the substrate, and the other end of the magnet body faces the recess of the substrate. The leg member may be integrally formed so as to protrude, and the tip of the leg member may be supported in the recess.

Further, the other end of the magnet body is integrally formed with a substantially triangular pyramidal leg member having a surface smoothly connected to the spherical surface of the magnet body and having a rounded tip end portion. A concave surface having a radius of curvature larger than that of at least the rounded tip of the leg member may be formed on the surface of the leg member, and the tip end of the leg member may be slidably supported by the concave surface.

Further, the magnet catch of the present invention is accommodated on the side opposite to the magnet body of the support member inside the housing and includes an elastic body for urging the support member and the magnet body toward the opening. Is preferred.

The magnet body may include a magnet and a pair of yokes arranged so as to sandwich the magnet.

[0017]

The magnet body has a flat abutment surface at one end and a spherical surface on the side surface which is continuous with the abutment surface. Further, the housing has an opening portion at one end thereof having a diameter smaller than at least the maximum diameter of the magnet body and larger than the diameter of the contact surface. Therefore, the magnet body can roll around and change the direction of the contact surface while bulging the contact surface without coming out from the opening. At this time, the support member restricts the rolling while supporting the other end of the magnet body, so that the magnet body does not overroll and the contact surface does not enter the housing.

The supporting member includes a substrate and a protrusion,
A small recess corresponding to the protrusion is formed on the other end of the magnet body, and when the tip of the protrusion is fitted in the small recess, the range where the fitting does not come off around the tip of the protrusion Roll inside. In this way, rolling is restricted while the other end of the magnet body is supported, so that the magnet body does not overroll and the contact surface does not enter the housing.

Further, the supporting member includes a substrate and a recess,
At the other end of the magnet body, a leg member is integrally formed so as to project toward the recess of the substrate, and when the tip of the leg member is supported in the recess, the leg member moves as the magnet rolls. The member is displaced within the recess. When the support member reaches the inner surface of the recess, it cannot be displaced any further, so that the other end of the magnet body is restricted from rolling while being supported by the support member. Therefore, the contact surface does not enter the housing without the magnet body rolling too much.

Further, the other end of the magnet body is provided with a surface which is smoothly continuous with the spherical surface of the magnet body, and has a substantially triangular pyramidal leg member having a rounded tip end, which is integrally formed, and the surface of the support member. Has a concave surface having a radius of curvature larger than that of at least the rounded tip of the leg member,
When the tip end portion of the leg member is slidably supported by the concave surface, the tip end portion of the leg member slides on the concave surface of the support member when the magnet body rolls. When the tip of the sliding leg member reaches the concave end of the support member, it collides with the inner wall of the housing and cannot slide any further. Therefore, since rolling is restricted while the other end of the magnet body is supported, the magnet body does not overroll and the contact surface does not enter the housing.

Further, when the support member and the magnet body are urged toward the opening by the elastic body, the impact when the magnet body is pushed into the housing is absorbed by the elastic body. Thus, the so-called rough closing of the door is prevented. Also, after that, due to the restoring force of the elastic body,
The magnet body returns to its original position.

The magnet body may include a magnet and a pair of yokes arranged so as to sandwich the magnet. In particular, when a gap is provided between the pair of yokes, the attractive force due to the magnetic force can be increased.

[0023]

According to the magnet catch of the present invention, the direction of the contact surface of the magnet body with respect to the fixed housing can be changed in various directions. for that reason,
If the door or other opening / closing member does not close parallel to the main body of furniture, or if the magnet catch is distorted, the magnet body will roll in response to the tilt of the opening / closing member. The contact surface is in surface contact with the adsorption piece attached to the opening / closing member, is attracted by the magnetic force, and the member that is reliably opened / closed can be closed.

Further, the rolling of the magnet body of the magnet catch of the present invention is carried out with the contact surface always bulging from the opening of the housing, and the contact surface does not enter the housing. Therefore, there is no need to perform an operation to bulge the contact surface into the opening, which would be necessary if the contact surface goes into the housing, and the magnetic catch can be used at any time, which is convenient. Good nature.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments of the invention with reference to the drawings.

[0026]

1 is a perspective view showing a magnet catch according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II thereof. This magnet catch 10 has a cylindrical housing 12 with both ends open.
including. The housing 12 is formed of a metal such as brass or a non-magnetic material such as resin. Housing 1
One end edge of 2 is bent obliquely inward of the housing 12 and is formed as a planar annular first prevention hook 12a. The other end edge of the housing 12 is bent inward toward the inside of the housing 12 so as to have an arcuate cross section along a spherical surface of a magnet body, which will be described later, and is formed as a planar annular second prevention claw 12b. It Since the diameters of the opening portions at both ends of the housing 12 are respectively narrowed by the first retaining prevention claws 12a and the second retaining prevention claws 12b, the objects stored inside the housing 12 do not come out without permission. Further, since the opening 12c at the other end of the housing 12 surrounded by the second retaining prevention claw 12b swells the contact surface 28 of the magnet body 22 described later, it is at least smaller than the maximum diameter of the magnet body 22. , A diameter larger than that of the contact surface 28.

The magnet catch 10 also includes a disc-shaped bottom plate 14 made of a non-magnetic material such as metal such as brass or resin. As shown in FIG. 2, the bottom plate 14 is housed inside the housing 12 and is supported by the first retaining prevention claws 12a. With respect to the bottom plate 14, the following description will be given with the side of the first retaining prevention claw 12a as the bottom and the opposite side as the top. On the bottom plate 14 in the housing 12, a cushion material 18 made of, for example, foamed polyurethane sponge or foamed neoprene is arranged as an elastic body. On the surface of the cushion member 18 facing the bottom plate 14, a thin plate-shaped reinforcing member 16 made of, for example, FRP is fixed and lined. And the cushion material 18
Is placed on the bottom plate 14 such that the reinforcing member 16 contacts the bottom plate 14.

A support member 20 having an inverted T-shaped cross section is arranged on the cushion member 18 in the housing 12 for supporting a magnet body 22 described later and for limiting rolling. The support member 20 is made of a non-magnetic material, for example, a resin such as POM. The support member 20 is formed by integrally forming a disk-shaped substrate 20a and a protrusion 20b formed so as to protrude upward from a central portion thereof. The tip of the protrusion 20b is rounded and has a smooth spherical surface. The diameter of the base plate 20a is formed to be slightly smaller than the inner diameter of the housing 12 in order to allow the support member 20 to move within the housing 12. Therefore, since the support member 20 can be displaced in the housing 12 when the magnet body 22 described later rolls in the housing 12, the magnet body 22 can roll more greatly and smoothly.

A substantially spherical magnet body 22 is rotatably housed inside the housing 12. This magnet body 2
2 includes a substantially spherical yoke 24 made of a magnetic material. On the end surface of the yoke 24 facing the support member 20, the support member 2
A small recess 26, which is a small recess for fitting the zero protrusion 20b, is formed. The small recess portion 26 has a smooth curved surface with an arcuate cross section corresponding to the roundness of the tip of the protrusion 20b.
Therefore, the magnetic body 22 in which the protrusion 20b of the support member 20 is fitted in the small recess 26 is configured so that the tip of the protrusion 20b is the center and the end of the protrusion 20b slides on the surface of the small recess 26. Rolling in the housing 12. Also,
Since the housing 12 is cylindrical and the magnet body 22 is substantially spherical, the magnet body 22 can roll in any direction of 360 °. Further, a flat circular contact surface 28 is formed on the end surface of the yoke 24 opposite to the small recess 26.
Is formed. The contact surface 28 is, as in the conventional case, a surface contact with a suction piece attached to an opening / closing member such as a door for suction.

The magnet body 22 is formed in the opening 1 of the housing 12.
The contact surface 28 is bulged from the opening 12c while the spherical surface near the contact surface 28 is pressed by the inner surface of the second retaining prevention claw 12b so as not to come out of the opening 2c. In this case, since the second retaining prevention claw 12b is formed in an arcuate cross section so as to fit along the spherical surface in the vicinity of the contact surface 28, the magnet body 22 is formed by the second retaining prevention claw 12b. While being pressed and bulging the contact surface 28 from the opening 12c,
It can roll within the housing 12. When rolling, the magnet body 22 is supported at two points: the second retaining prevention claw 12b and the inner surface of the housing 12 in the vicinity thereof, and the protrusion 20b of the support member 20.

A storage groove 30 having a rectangular cross section is formed in the yoke 24 and extends in the vertical direction in FIG. Storage groove 3
0 is formed so as to be cut from the contact surface 28 of the yoke 24 to the vicinity of the small recess portion 26, and opens to the contact surface 28 and the spherical surface of the side surface continuous with the contact surface 28. Therefore, in the yoke 24, the pair of planar bow-shaped members are formed by the storage groove 3
They are opposed to each other with 0 interposed therebetween and are connected in the vicinity of the small recess 26. Then, the plate-shaped magnet 32 having a predetermined thickness is housed in the housing groove 30 such that the magnet 32 is fitted in the contact surface 28 in such a direction that the magnetic pole appears.

FIG. 3 is a schematic sectional view showing the operating condition of the embodiment shown in FIG. This magnet catch 10
As in the conventional case, the housing 12 is fixed to the main body of, for example, furniture or a copying machine by a known method such as screwing, press fitting, or adhering. And the member b that opens and closes, such as the door,
When approaching the contact surface 28 in the state shown in FIG. 2 obliquely, the magnet body 22 rolls as shown in FIG. 3 and the attraction piece c and the surface attached to the member b that opens and closes. It comes into contact and is attracted by the magnetic force of the magnet 32. Therefore, according to the magnet catch 10, even when the member b to be opened and closed comes to be obliquely closed, or when the attachment itself of the magnet catch 10 is distorted, it is possible to cope with the inclination, and the suction piece c. It is possible to reliably close the member b that adsorbs and opens.

In addition, the projection 2 of the support member 20 is provided in the small recess 26.
Since 0b is fitted and hooked, the magnet body 22 can roll within a range where the fitting is not disengaged. Therefore, there is no inconvenience that the contact surface 28 gets into or is hidden in the housing due to the magnet body 22 rolling too much. Therefore, when the contact surface 28 gets into the housing 12, an operation such as rolling the magnet body 22 with a finger to bulge the contact surface 28 is necessary. According to 10, there is no need for that, and it is always in use, which is convenient.

Further, FIG. 4 is a cross sectional view showing another operating condition of the embodiment shown in FIG. In the magnet catch 10, the support member 20 and the magnet body 22 are biased toward the opening 12c of the housing 12 by the cushioning material 18 having flexibility. Therefore, the shock when the magnet body 22 is pushed toward the inside of the housing 12 as shown by the one-dot chain line arrow in FIG. 4 is absorbed by the cushion material 18, and so-called rough closing of the member that opens and closes is prevented. It After that, the restoring force of the cushion material 18 causes the magnet body 22 to return to its original position. Therefore, in a normal state, the magnet body 22 is moved by the urging force of the cushion material 18 to prevent the second stopper pin 12 from coming off.
Since it is pressed against b, it will not roll on its own unless external force is applied. Further, when the magnet body 22 rolls, the cushion member 18 is fixed to the support member 2
Since it deforms flexibly according to the displacement of 0, the rolling of the magnet body 22 can be performed more greatly and smoothly.

The cushion material 18 is not limited to the above materials, but a spring may be used, for example. Further, as in the conventional case, the housing 12 may be provided with a screw thread on the outer surface in a spiral shape, or may be integrally provided with a male screw. Further, the flange portion may be integrally provided.

FIG. 5 is a sectional view showing another embodiment of the present invention, and FIG. 6 is a sectional view showing the operating condition. The magnet catch 10 ′ shown in FIG. 5 is different from the magnet catch 10 ′ shown in FIG.
2 is different. The supporting member 20 of the embodiment shown in FIG.
The disk-shaped substrate 20a and the protrusion 20b formed so as to protrude upward from the peripheral portion thereof are integrally formed. Therefore, the support member 20 is formed in a concave shape in cross section, and the center thereof is the leg members 34a and 34 described later.
It becomes a concave portion 20c for supporting the tip of b.

The magnet body 22 of the embodiment shown in FIG.
A pair of yokes 24a and 24b having spherical surfaces on their side surfaces
including. The pair of yokes 24a and 24b are arranged to face each other while sandwiching the magnet 32 having a rectangular cross section in the middle, and are integrally held by the magnetic force of the magnet 32. The planar shape of the magnet 32 may be a polygon such as a rectangle or a circle. As shown in FIG. 5, an appropriate gap is provided between the pair of yokes 24a and 24b, so that the attraction force by the magnetic force of the magnet 32 is strengthened.

On the end faces of the yokes 24a and 24b facing the support member 20, leg members 34a and 34b having a rectangular cross section are integrally formed so as to project toward the recesses 20c of the support member 20, respectively. Leg member 34a
The tip ends of and 34b are brought into contact with and supported by the recess 20c of the support member 20. In this case, as shown in FIG. 5, the leg members 34 a and 34 b are provided in the recess 20 c of the support member 20.
It is formed so as to fit within a diameter slightly smaller than the inner diameter of. Therefore, since a margin (space) is created between the foot members 34a and 34b and the inner surface of the recess 20c of the support member 20, within the margin, that is, the leg member 34a.
The magnet body 22 can roll as shown by the alternate long and short dash line in FIG. Moreover, in this embodiment, as shown in FIG. 6, the flexible cushion member 18 is deformed, so that the magnet body 22 can roll more greatly and smoothly. In this way, rolling is restricted while the other end of the magnet body 22 is supported, so that the magnet body 22 does not overroll and the contact surface 28 does not enter the housing. As described above, also with the magnet catch 10 'shown in FIGS. 5 and 6, the same effect as that of the above-described embodiment of FIG. 1 can be obtained.

Further, FIG. 7 is a sectional view showing still another embodiment of the present invention, and FIG. 8 is a sectional view showing the operating condition thereof. This magnet catch 10 ″
It includes a cylindrical housing 12 made of a non-magnetic material.
The other end edge of the housing 12 is bent inward toward the inside of the housing 12 so as to have an arcuate cross section along a spherical surface of a magnet body 22 to be described later, and has a planar annular second retaining hook 12.
formed as b. A screw thread 12d is spirally formed on the outer surface of the housing 12.

The magnet catch 10 "is a bottom plate 14 made of a non-magnetic material and having a flat disk shape and a concave cross section.
including. The bottom plate 14 is, as shown in FIG.
It is fixed to one end of 2. Bottom plate 14 in housing 12
A cushion member 18 made of a spring as an elastic body is arranged in the recess 14a. In the embodiment shown in FIGS. 7 and 8, in order to minimize the space for accommodating the cushion material 18 and to reduce the overall size, a conical coil type spring that can obtain a desired biasing force even in a small space is used.

On the cushion member 18 in the housing 12, there is disposed a support member 20 having a plane circular shape for supporting the magnet body 22 and limiting rolling. Support member 20
Is made of a non-magnetic material and has a concave surface 20c having an arcuate cross section on its surface. The radius of curvature of the concave surface 20c is formed to be larger than at least the radius of curvature formed by the tips of the leg members 34a and 34b of the magnet body 22 described later. Also,
The diameter of the support member 20 is formed to be slightly smaller than the inner diameter of the housing 12 in order to allow the support member 20 to move within the housing 12 as in the above-described embodiments.

The magnet body 22 of the embodiment shown in FIGS. 7 and 8 includes a pair of yokes 24a and 24b having spherical surfaces on the side surfaces. A pair of yokes 24a and 24b
Are arranged so as to face each other while sandwiching a magnet 32 having a rectangular cross section in the middle, and are integrally held by the magnetic force of the magnet 32. As shown in FIG. 7 and FIG. 8, by providing an appropriate gap between the pair of yokes 24a and 24b, the attraction force by the magnetic force of the magnet 32 is strengthened.

Further, in the magnet body 22, the spherical surface in the vicinity of the contact surface 28 is pressed by the inner side surface of the second retaining prevention claw 12b so as not to come out from the opening 12c of the housing 12, while the contact surface 28 is being pressed. Are bulged from the opening 12c. In this case, since the second retaining prevention claw 12b is formed in an arcuate cross section so as to fit along the spherical surface in the vicinity of the contact surface 28, the magnet body 22 is formed by the second retaining prevention claw 12b. It is possible to roll in the housing 12 while being pressed and bulging the contact surface 28 from the opening 12c.

Support member 20 for yokes 24a and 24b
The concave surface 20 of the support member 20 is provided on each of the end surfaces facing each other.
A leg member 3 having a substantially triangular pyramid cross section so as to project toward c.
4a and 34b are integrally formed. As shown in FIGS. 7 and 8, the side surfaces of the yokes 24a and 24b and the side surfaces of the leg members 34a and 34b are formed so as to be continuously continuous smoothly. A spherical surface is provided on the surface 28 side, and the other end side is formed in a substantially egg-shaped cross-section with a slight taper. The tips of the leg members 34a and 34b are at least the support member 20.
The concave surface 20c is rounded so as to have a smaller radius of curvature than that of the concave surface 20c. Then, the leg member 34a
The tip ends of 34b and 34b abut on the concave surface 20c of the support member 20 and are slidably supported.

In the magnet catch 10 "shown in FIGS. 7 and 8, since the housing 12 has a cylindrical shape and the magnet body 22 is substantially egg-shaped, the magnet body 22 is 360 °.
It can roll in either direction. Magnet body 22
When rolling, is supported at two points, that is, the plane-shaped second retaining prevention claw 12b and the inner surface of the housing 12 in the vicinity thereof, and the concave surface 20c of the support member 20 described later.
Further, in a normal state, the magnet body 22 is pressed against the second retaining hook 12b by the urging force of the cushion material 18, so that the magnet body 22 does not roll freely unless an external force is applied. . Furthermore, the cushion material 18
Can be flexibly deformed, so that when the magnet body 22 rolls,
It is possible to flexibly cope with changes in the positions of the magnet body 22 and the support member 20.

When the magnet body 22 rolls, the tip ends of the leg members 34a and 34b are concave surfaces 2 of the support member 20.
Slide on 0c. Sliding leg members 34a and 34b
When the tip portion of reaches the end of the concave surface 20c of the support member 20,
Since it collides with the inner wall of the housing 12, it cannot slide any further. Therefore, since the rolling is restricted while the other end of the magnet body 22 is supported, the abutting surface 28 does not enter the housing 12 without the rolling of the magnet body 22 too much. In this way, the same effects as those of the embodiment of FIG. 1 described above can be obtained with the magnet catch 10 ″ shown in FIGS. 7 and 8.

[Brief description of drawings]

FIG. 1 is a perspective view showing a magnet catch that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II shown in FIG.

FIG. 3 is a cross-sectional schematic view showing an operating condition of the embodiment shown in FIG.

FIG. 4 is a cross sectional view showing another operation state of the embodiment shown in FIG.

FIG. 5 is a sectional view showing another embodiment of the present invention.

FIG. 6 is a schematic sectional view showing an operating condition of the embodiment shown in FIG.

FIG. 7 is a sectional view showing still another embodiment of the present invention.

FIG. 8 is a cross sectional view showing the operating condition of the embodiment shown in FIG.

FIG. 9 is a perspective view showing a usage state of a conventional magnet catch which is a background of the present invention.

FIG. 10 is a perspective view showing an example of a conventional magnet catch.

11 is a cross-sectional view taken along line XI-XI shown in FIG.

FIG. 12 is a perspective view showing another example of a conventional magnet catch.

13 is a cross-sectional view taken along line XIII-XIII shown in FIG.

FIG. 14 is a sectional view showing still another example of a conventional magnet catch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Magnet catch 12 Housing 12a 1st retaining prevention claw 12b 2nd retaining prevention claw 14 Bottom plate 16 Reinforcing material 18 Cushion material 20 Supporting member 20a Substrate 20b Projection 22 Magnet body 24 Yoke 26 Small recess 28 Contact surface 30 Storage groove 32 magnets

Claims (6)

[Claims] 1. A magnet body having a flat contact surface at one end and a spherical surface on the side surface that is continuous with the contact surface, and at one end at least smaller than the maximum diameter of the magnet body,
A housing having an opening having a diameter larger than the diameter of the contact surface, the housing rotatably accommodating the magnet while bulging the contact surface of the magnet from the opening;
And the housing is housed on the opposite side of the contact surface of the magnet body in the housing, and while supporting the other end of the magnet body, the contact surface enters into the housing when the magnet body rolls. A magnetic catch including a support member for limiting rolling of the magnet body so as not to be damaged. 2. The supporting member includes a substrate having at least a diameter smaller than an inner diameter of the housing, and a protrusion provided so as to protrude from a surface of the substrate, and the other end of the magnet body is provided at the other end. The small recess corresponding to the protrusion is formed, and the tip of the protrusion is fitted into the small recess.
The magnetic catch described in. 3. The supporting member includes a substrate having a diameter at least smaller than an inner diameter of the housing, and a recess formed on a surface of the substrate, and the magnet member has the other end on which the substrate is formed. The leg member is integrally formed so as to project toward the recess, and the tip end of the leg member is supported in the recess.
The magnetic catch described in. 4. A leg member of a substantially triangular pyramid shape having a surface smoothly connecting to the spherical surface of the magnet body and having a rounded tip end is integrally formed at the other end of the magnet body. A concave surface having a radius of curvature larger than a radius of curvature of the rounded tip portion of the leg member is formed on a surface of the support member, and the tip portion of the leg member is slidable in the concave surface. The magnetic catch according to claim 1, which is supported. 5. An elastic body that is housed inside the housing on a side of the support member opposite to the magnet body, and includes an elastic body for urging the support member and the magnet body toward the opening. The magnet catch according to any one of claims 1 to 4. 6. The magnet catch according to claim 1, wherein the magnet body includes a magnet and a pair of yokes arranged so as to sandwich the magnet.