JPS5820909Y2 - Assembly of permanent magnet and yoke in temperature responsive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature-responsive device, and particularly to an assembly structure of a permanent magnet and a yoke as a movable part thereof.

BACKGROUND ART Temperature-responsive devices have been known that combine a temperature-sensitive magnetic material, which is a low-curing material, and a permanent magnet.

As an example, a temperature-sensitive magnetic material is installed as a fixed part on a heat-sensitive part, and a combination of a permanent magnet and a yoke is placed opposite to this as a movable part. There is a temperature-responsive device that displaces the movable part by utilizing the disappearance of the magnetic attraction between the movable part and the fixed part.

As the displacement force, the gravity of the movable part itself or the urging force of a spring or the like is used.

By the way, in such a temperature-responsive device, the permanent magnet and yoke are assembled using bolts, for example, but when a barium ferrite or strontium ferrite magnet is used as the permanent magnet, Since drilling holes is difficult, it is impossible to assemble with bolts, etc., and bonding with adhesive alone is insufficient.
Assembly work is also difficult.

The object of the present invention is to provide an assembly structure of a permanent magnet and a yoke that is easy to assemble and easy to construct.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

Fig. 1 is a diagram showing an embodiment of the present invention, and Fig. a is a front view;
Figure b is a side view.

Referring to the figure, yokes 2 and 2' are attached to both magnetic pole faces of permanent magnet 1.
Touch and pinch.

The yokes 2, 2' extend parallel to each other in the same direction, and cutouts 21, 21' are formed on both side edges of the portions protruding from the magnetic pole faces.

The holder 3 that includes the permanent magnet 1 and the yoke is a member made of a non-magnetic material and has an approximately n-shaped cross section.Protrusions 31 and 32 are formed on both sides of the lower end and on both ends of the ceiling. 1 and yokes 2 and 2', bend the protrusions 31 and 32, and the bent protrusions 31
, 2' are engaged with the notches 21° 21' to support the yoke in the holder 3, and the bent protrusion 32 prevents the yokes 2, 2' and the magnet 1 from coming off from the holder. .

If the holder is elastic, the holder itself will firmly hold the yoke and the permanent magnet. However, if possible, the protrusion 31 of the holder 3 should be made long so that it reaches the bottom surface of the permanent magnet 1. Pulling out can also prevent it from falling off.

With this structure, if the permanent magnet, yoke, and holder are prepared in advance with good dimensional accuracy, it can be easily assembled with high precision by simply bending the protrusions.

FIG. 2 is a diagram showing another embodiment of the present invention, in which figure a is a front view, figure b is a bottom view, and figure 0 is a sectional view.

Referring to the same figure, yokes 2 and 2' are attached to the magnetic pole surface of the permanent magnet 1.
Touch and pinch.

Each of the yokes 2, 2' is provided with a projection 22.22' on one side, which extends on the side surface of the permanent magnet 1, and a projection 23.23' whose lower end likewise extends onto the lower surface of the permanent magnet.
It is bent to have .

Each yoke 2, 2' is also formed with a hole 21, 21'.

A holder 3 molded from resin and having a cross-sectional opening shape has a protrusion 31 on its inner surface, and a permanent magnet 1 and yokes 2, 2' are attached to the holder 3.
When the yokes 2 and 2' are housed, the protrusions 31 and 31 fit into the holes 21 and 21 of the yokes 2 and 2', respectively, thereby fixing the yokes 2 and 2' and the permanent magnet 1 in the holder. Ru.

Note that the holder 3 may be made of a non-magnetic metal material, in which case the projections 31, 31 can be formed by processing such as punching.

Further, if the lower surfaces of the protrusions 31, 31 are tapered as shown in the figure, the holder 3 only needs to be inserted from above during assembly, making assembly easier.

In Figures 1 and 2, reference numeral 4 denotes an operating rod that is attached to the top surface of the holder 3 or is formed integrally with the holder, and is used for supporting and guiding the permanent magnet and yoke assembly, which are movable parts. It is used.

Fig. 3 is a diagram showing still another embodiment, in which Fig. a is a front view;
Figure b is a side view, in contrast to Figure 1, in which the operating rod 4 is attached to the holder 3 by header processing, and the engagement protrusions 31 and 31 of the holder 3 with the yokes 2 and 2' are located at the center of the lower end of the holder. The difference is that correspondingly, notches 21 and 21' of the yokes 2 and 2' are provided at the center of the lower ends of the yokes 2 and 2'. is substantially the same as

According to the present invention, the assembly work of the permanent magnet and the yoke can be performed extremely simply and accurately, and the assembled state can be maintained securely.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, in which figure a is a front view and figure b is a side view. FIG. 2 is a diagram showing another embodiment of the present invention, in which figure a is a front view, figure b is a side view, and figure 0 is a sectional view. Fig. 3 is a diagram showing still another embodiment, in which Fig. a is a front view;
Figure b is a side view. 1...Permanent magnet, 2.2'...Yoke, 21.21'...Notch (or hole), 22
．． 22', 23.23'...protrusion, 3...
...Holder, 31...Protrusion, 4...Operation rod.

Claims (1)

[Scope of utility model registration request] A temperature-sensitive magnetic material plate is installed on a heat-sensitive part, and an assembly of a permanent magnet and a yoke is movably arranged opposite to the temperature-sensitive magnetic material, so that the temperature-sensitive magnetic material becomes paramagnetic when the temperature rises. In the temperature-responsive device, the assembly is moved by the disappearance of the magnetic attraction between the permanent magnet and the assembly, in which a yoke is brought into contact with both magnetic pole faces of the permanent magnet, and a cut or hole is formed in the yoke. A holder made of a non-magnetic material containing the yoke and a permanent magnet is provided with a protrusion in a portion corresponding to the notch or hole, and by engagement of the protrusion with the notch or hole, the A permanent magnet and yoke assembly for a temperature-responsive device, characterized in that the permanent magnet and yoke are supported within a holder.