JPH054258Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a suction tool having a yoke used for daily goods, furniture, audio equipment, office equipment, electronic equipment, etc. This invention relates to an adsorption tool in which a magnetic gap is secured between the rising part of the yoke and the permanent magnet and the yoke and the permanent magnet are centered by forming a protrusion by punching out the base side.

[Prior art] Conventional suction devices using permanent magnets include a suction device using a yoke and a permanent magnet, in which a permanent magnet is bonded inside a yoke having a rising portion with a gap provided between it and the rising portion of the yoke. Some items were glued together with the adhesive, but before the adhesion was complete, the permanent magnet moved due to attraction to one rising part and came into contact with the yoke, so the magnetic gap disappeared and the magnetism shorted, and the adhesion force was sufficient. It wasn't.

For this purpose, a hole is made approximately at the center of the permanent magnet and the yoke, and a cylindrical fixture is caulked into the hole of the permanent magnet, and this fixture is caulked into the hole of the yoke to align the centers of the permanent magnet and the yoke. There was one in which a magnetic gap was created between the permanent magnet and the rising part of the yoke.

In addition, a stepped portion is formed in the continuous portion between the magnetic pole plate portion attached to the permanent magnet of the yoke and both rising portions provided on both sides of the magnetic pole plate portion, and the permanent magnet is housed between the stepped portion and the permanent magnet is Some were designed to ensure a magnetic gap between the yoke and the rising part of the yoke.

[Problems to be solved by the invention] However, it is difficult to align the centers of the permanent magnet and yoke that are integrated through a cylinder. In other words, since the permanent magnet is attracted to the yoke, it is difficult to automate the centering and mounting work using a machine, which increases the cost.In addition, especially in the case of an adsorbent using a rectangular permanent magnet, it is difficult to automate the centering and mounting work using a machine. The crimped part of the yoke loosens, causing the yoke and permanent magnet to rotate relative to each other, causing the corner of the permanent magnet to come into contact with the rising part of the yoke, creating a magnetic short circuit, which has the disadvantage of reducing the attraction force. Ta.

In addition, if a stepped portion is formed in the continuous portion between the magnetic pole plate portion and the rising portion of the yoke, the cost for forming the yoke increases, and the attachment of the suction tool to the mounting plate is unstable because there are spaces on both sides. It was easy to become.

In view of the above situation, the present invention consists of a permanent magnet and a yoke, has a simple structure and is easy to manufacture.
The object of the present invention is to provide a suction tool that is low in cost and has reliable suction.

[Means for Solving the Problem] In order to achieve the above object, the present invention in the first invention uses a permanent magnet that is magnetized in the thickness direction of the suction tool and one magnetic pole surface of this permanent magnet. and a yoke consisting of a magnetic pole plate attached to the magnetic pole plate, and a rising portion extending laterally between both magnetic poles of the permanent magnet, which is a side portion of the magnetic pole plate, and an upper end of the rising portion of the yoke. The edge is located on the same plane as the other magnetic pole surface of the permanent magnet, or slightly above or below the same plane, and a part where this rising part and the magnetic pole plate part are connected has a shape that is integrally punched out from the outside. protrusions are provided in the yoke, the permanent magnet is housed between the protrusions, and a magnetic gap is formed between the side surface extending between the magnetic poles of the permanent magnet and the rising part of the yoke; In the invention, a permanent magnet is magnetized in the thickness direction, a magnetic pole plate attached to one magnetic pole surface of the permanent magnet, and a side between the two magnetic poles of the permanent magnet from the side of the magnetic pole plate. a yoke consisting of a rising portion extending in the direction, and a mounting tool is provided in a hole provided from one magnetic pole surface of the permanent magnet toward the other magnetic pole surface and a hole provided in a magnetic pole plate portion of the yoke. The permanent magnet is inserted into the yoke, and the permanent magnet and the yoke are integrally formed, and a protrusion is provided integrally from the outside in the continuous portion between the magnetic pole plate portion and the rising portion of the yoke. The side surface extending between the magnetic poles is in contact with the protrusion of the yoke.

[Function] The suction tool configured as in the first invention has a structure in which the suction tool is provided between the protrusions that are integrally pushed out from the outside at the connection between the magnetic pole plate part and the rising part of the yoke.
Since a magnetic gap is provided between the side surface extending between the magnetic poles of the permanent magnet and the rising portion of the yoke simply by housing the permanent magnet, the configuration of the gap is reliable and the adsorption efficiency is high.

In addition, in the second invention, the permanent magnet can be easily moved from one magnetic pole surface of the permanent magnet to the other by simply fitting the permanent magnet between the protrusions that are protruded from the outside and are provided at the connection between the rising part of the yoke and the magnetic pole plate part. Since the centers of the hole provided facing the surface and the hole provided in the magnetic pole plate portion of the yoke coincide, it is extremely easy to integrate the permanent magnet and the yoke by inserting a fixture.

[Example] An example of the suction device according to the present invention will be described below with reference to the drawings.

1 is a yoke with a U-shaped cross section consisting of a magnetic pole plate portion 1a and rising portions 1b on both sides of the magnetic pole plate portion 1a, and 2 is a rectangular yoke that is magnetized in the thickness direction and is installed inside the yoke 1. A permanent magnet in the form of a body, such as a sintered magnet such as ferrite or alnico, a rare earth magnet, a plastic magnet, or a rubber magnet, is used, and one magnetic pole surface a is adhered to the magnetic pole plate portion 1a of the yoke 1, and the above-mentioned The upper edge of the rising portion 1b of the yoke 1 is flush with the other magnetic pole surface b of the permanent magnet 2. The upper edge of this rising portion 1b is the magnetic pole surface b.
It may be located slightly above or below the same plane as the above. In this specification, the yoke 1 focuses the magnetic lines of force of the permanent magnet 2 and also functions as a magnetic path, and is made of, for example, ferromagnetic material, typically made of iron, nickel alloy, etc. Made of high magnetic permeability material.

Further, the yoke 1 is provided with a plurality of protrusions 1c formed in a shape in which the yoke 1 is pushed out from the outside toward the inside at the part where the yoke 1 is connected to the opposing rising parts 1b, 1b. A permanent magnet 2 is housed in the yoke 1, and a magnetic gap 1 is formed between the permanent magnet 2 and the rising portion 1b of the yoke 1 to prevent a magnetic short circuit.

That is, the permanent magnet 2 and the yoke 1 are located at the rising portion 1b.
If they are in contact with each other, a magnetic short circuit will be created, so
The magnetic flux passing through the contact surface between the upright yoke portion 1a of the adsorbent and the plate to be adsorbed by the adsorbent decreases, so the adsorption force becomes weaker. However, by providing the magnetic gap l, most of the Since a magnetic circuit through which the magnetic flux passes is formed through the plate to be attracted, the plate to be attracted is effectively attracted and the attraction force is strong.

Further, on both sides of the yoke 1 in a direction perpendicular to the facing direction of the rising portion 1b, locking edges 1d are provided integrally with the magnetic pole plate portion 1a to prevent lateral displacement. Instead of 1d, a locking protrusion 1c' is provided by punching out the edge as shown in FIG.

When attaching this suction tool A to a plate such as a door,
One of the locking edges 1d provided as shown in FIG.
A mounting screw hole 1f is provided in , and the mounting screw is inserted into this hole 1f for installation. FIG. 5 shows an embodiment in which extensions 1e of the locking edge 1d are provided on both sides of the permanent magnet 2.

In FIG. 6, a hole 2a is provided through the permanent magnet 2 from one magnetic pole surface a to the other magnetic pole surface b, and a hole 1g is also provided through the magnetic pole plate portion 1a of the yoke 1. In this embodiment, a cylindrical fixture 3 is inserted into the holes 2a and 1g and caulked, so that the permanent magnet 2 and the yoke 1 are integrated.

In addition, a protrusion 1c is formed integrally from the outside at the continuous portion between the magnetic pole plate portion 1a and the rising portion 1b of the yoke 1.
is provided, and the side surface extending between both magnetic pole faces a and b of the permanent magnet 2 is in contact with the protrusion 1c provided on the yoke 1.

A plurality of protrusions 1c are formed by punching out the yoke 1 at a continuous portion between the magnetic pole plate portion 1a and the rising portion 1b, facing inward, and the permanent magnet 2 is housed between the protrusions 1c, so that the permanent magnet 2 and the yoke are 1 is automatically centered, and a magnetic gap 1 is provided between the rising portion 1b of the yoke 1 and the side surface extending between both magnetic pole faces of the permanent magnet 2.

In addition, in this suction tool A, the yoke 1 has a rectangular plate shape and a circular plate shape, and a hole 1g is bored in the center of the magnetic pole plate, and the permanent magnet 2 also has a corresponding planar shape of a square plate and a circular plate shape. In some cases,

In addition to the above-mentioned cylindrical shape, the fixture 3 may be rod-shaped and have both ends caulked, or have a flange-like locking part at one end and caulk the other end. The suction tool is attached by inserting one end of the tool 3 protruding from the magnetic pole plate portion 1a side of the yoke 1 into a hole drilled in a plate or the like to which the suction tool is attached and caulking.

In addition, the fixture 3 is used only to attach the yoke 1 and the permanent magnet 2, and for attachment to a plate etc., an extension is provided on the magnetic pole plate portion 1a of the yoke 1, and a screw or screw is inserted into the hole provided in this extension. In some cases, it may be attached to the plate by inserting nails or the like.

[Effects] The suction device according to the present invention includes a permanent magnet magnetized in the thickness direction, a magnetic pole plate attached to one magnetic pole surface of the permanent magnet, and a side portion of the magnetic pole plate. a yoke consisting of a rising portion extending laterally between both magnetic pole faces of the permanent magnet, and the upper edge of the rising portion of the yoke is flush with or flush with the other magnetic pole face of the permanent magnet. A protrusion that is located slightly above or below and is connected to the rising part and the magnetic pole plate part is provided with a protrusion integrally pushed out from the outside, and the permanent magnet is housed between the protrusions. Since a magnetic gap is formed between the side surface extending between the magnetic poles of the permanent magnet and the rising portion of the yoke, there is a magnetic gap between the side surface extending between both magnetic pole surfaces of the permanent magnet of the adsorption tool and the rising portion of the yoke. There is no magnetic short circuit, and when the attracted plate is attracted, a magnetic circuit passing through the attracted plate is formed between the magnetic pole surface on the attraction side of the permanent magnet and the upper edge of the rising part of the yoke, so that the magnetic flux is connected to the attracted plate. The suction force is large because it passes through the contact surface with the rising portion of the yoke intensively or the adjacent surface.

The yoke includes a magnetic pole plate attached to one magnetic pole surface of the permanent magnet and a rising portion extending from the side of the magnetic pole plate laterally between both magnetic pole surfaces of the permanent magnet, A fixture is inserted into a hole provided from one magnetic pole surface of the permanent magnet toward the other magnetic pole surface and a hole provided in the magnetic pole plate portion of the yoke, and the permanent magnet and yoke are integrated. Ori,
A protrusion is provided integrally from the outside in a continuous portion between the magnetic pole plate portion and the rising portion of the yoke, and a side surface extending between both magnetic poles of the permanent magnet is in contact with the protrusion of the yoke. In this case, a protrusion is provided on the part where the magnetic pole plate part and the rising part of the yoke are connected, and by fitting the permanent magnet between the protrusions, the side surface of the permanent magnet extending between both magnetic poles comes into contact with the protrusion. The holes made from one magnetic pole face of the permanent magnet to the other magnetic pole face can be automatically and accurately centered with the holes made in the magnetic pole plate of the yoke, making it easy to integrate and install with a fixture. It is extremely easy to attach to the plate, and the projections are formed by punching, so the formation work is simple and the work cost is low.

In addition, in the above-mentioned suction tool, a magnetic gap is formed between the permanent magnet and the yoke by the contact between the protrusion and the side surface extending between both magnetic pole surfaces of the permanent magnet, so that the rising part of the permanent magnet and the yoke is There is no risk of contact between the two.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the suction device according to the present invention, Fig. 2 is a sectional view of the same, Fig. 3 is a perspective view of another embodiment, and Figs. 4 and 5 are other embodiments. FIG. 6 is an exploded perspective view showing an example of an adsorption tool in which a permanent magnet and a yoke are integrated with a fixture, and FIG. The figure is a sectional view of the same, and FIGS. 8 and 9 are perspective views of various embodiments of the yoke. DESCRIPTION OF SYMBOLS 1... Yoke, 1a... Magnetic pole plate part, 1b... Standing part, 1c... Protrusion, 1g... Hole, 2... Permanent magnet, 2a... Hole, 3... Fixture.

Claims (1)

[Claims for Utility Model Registration] 1. A permanent magnet that is magnetized in the thickness direction, a magnetic pole plate attached to one magnetic pole surface of the permanent magnet, and a side part of this magnetic pole plate. , a yoke consisting of a rising portion extending laterally between both magnetic poles of the permanent magnet, and the upper edge of the rising portion of the yoke is on the same plane as the other magnetic pole surface of the permanent magnet, or slightly above the same plane, or At the same time as being located at the lower side, a protrusion is provided integrally from the outside in a continuous part between the rising part and the magnetic pole plate part, and the permanent magnet is housed between the protrusions. A suction device characterized in that a magnetic gap is formed between a side surface extending between magnetic poles of a permanent magnet and a rising portion of the yoke. 2. A permanent magnet that is magnetized in the thickness direction, a magnetic pole plate attached to one magnetic pole surface of the permanent magnet, and a magnetic pole plate attached to one magnetic pole surface of the permanent magnet, and a magnetic pole attached to the side of the magnetic pole plate from the side between the two magnetic poles of the permanent magnet. a yoke consisting of an extending rising portion, and a fixture is inserted into a hole provided from one magnetic pole surface of the permanent magnet toward the other magnetic pole surface and a hole provided in a magnetic pole plate portion of the yoke. , the permanent magnet and the yoke are integrated, and a protrusion is provided integrally from the outside in a continuous portion between the magnetic pole plate portion and the rising portion of the yoke, and a protrusion is provided integrally from the outside, and a protrusion is provided integrally from the outside, and a protrusion is formed integrally from the outside. A suction device characterized in that a side surface extending over the entire length is in contact with the protrusion of the yoke.