JPH0233820A - Polar electromagnet - Google Patents

Abstract

PURPOSE:To eliminate a drilling process and ensure the easy processing of an armature by providing a recess at the center of the armature and supporting the armature in such a way as to be capable of free turn via a projection engaged with the aforesaid recess. CONSTITUTION:A recess 28a is formed at the center of the intermediate part 28 of an armature 28 and engaged with the projection 29 of an elastic winding frame 27 forming an electromagnet together with a coil 30, via a resin material and the like, thereby supporting the armature 28 in such a way as to capable of free turn. Consequently, it is unnecessary to drill a small hole in the armature 28 for the pivotal support thereof for free turn and it becomes easy to process the armature 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polarized electromagnet used in, for example, a remote control switch used in combination with a remote control switch.

[Conventional technology]

Figures 8 to 10 show an example of a conventional polarized electromagnet. Figure 8 is a perspective view of a polarized electromagnet, Figure 9 is a perspective view of an armature, and Figure 10 is a perspective view of a polarized electromagnet. FIG. 3 is a perspective view showing the principle of operation. In these figures.

(1) is the main frame that also serves as a yoke, f2) and f3) are plate-shaped permanent magnets that are magnetized in the thickness direction and have N and S poles arranged as shown in the figure, and (4) is a permanent magnet ( The first yoke (5) is provided on the N pole side of the permanent magnet (3) and has both ends (4a) and (4b) and constitutes a magnetic circuit; (5) is also provided on the S pole side of the permanent magnet (3) and has both ends ( 5a), (5b) and a second yoke constituting a magnetic circuit; (6) is a coil; (7)
) is a synthetic resin winding frame that has a rib (7a) in the center and constitutes the coil (6), and (8) has a hole (8a) in the center and a pin (9) in this hole (8a). Pass through the winding frame (7)
An armature made of a steel plate is rotatably supported from above and below by a rib (7a) in the center of the armature, and 0ω is a winding wound around a winding frame (7) in a direction that goes around the armature (8). . Armature (8
) constitutes a magnetic circuit between the first yoke (4) and the second yoke (5), and has two magnetically stable states, one being one depending on the direction of the current flowing through the coil (6). FIG. 8 illustrates one magnetically stable state. Armature (8)
is provided at one end with a connecting member θ1) manufactured by casting synthetic resin and having a hole (Ha) for connecting with an opening/closing contact (not shown) operated by a polarized electromagnet, for example. .

In the armature (8) configured as described above, the hole (
8a) has an extremely small diameter and a deep depth, and in this example, the width of the hole surface (dimension D in Figure 9) is 3 (z shoulder), and the hole (
8a) has a diameter of 1.8 [11f) and a depth of IQ [gx].

Next, the operation will be explained from FIG. 10. In the armature (8) in one of the two magnetically stable states, the permanent magnet has 1, (31, so that the solid line (A
), namely the permanent magnet (2), one end of the first yoke (4a), the armature (8), the other end of the second yoke (5b), the permanent magnet (3) A magnetic circuit is formed via the yoke (body frame) (1) to maintain a magnetically stable state. In this state 1, if current is passed through the coil (6) in the direction of canceling the magnetic flux in the direction of the solid arrow (A) in the figure, the direction of the magnetic flux in the armature (8) is reversed, and the direction of the magnetic flux in the figure is reversed, ) + The magnetic circuit shown here, that is, from the other end (4b) of the first yoke, passes through the air gap, from one end of the armature (8), passes through the armature, and then from the other end to the second yoke. Since a magnetic circuit is formed leading to one end (5a) of the armature (8), attraction occurs between both ends of the armature (8), the end (4b) of the first yoke, and the end (5a) of the second yoke. The force acts and the generated moment causes the armature (8) to rotate once counterclockwise about the pin (9) and reverse to the other stable position shown by the dashed line in the figure. Furthermore, when the armature (8) is at the solid line position f in the figure, if a current that generates a magnetic flux in the same direction as the magnetic flux (A) in the direction of the solid line arrow in the figure is passed through the coil (6), the electric motor Since the direction of the magnetic flux of the child (8) does not change, the position of the armature (8) does not reverse.

[Problem to be solved by the invention]

In conventional magnets such as those mentioned above, the holes in the armature (8a
) and the pin (9) to engage and rotatably support it, it is necessary to machine a deep hole with a small diameter as the armature hole (8a). A hole (8a) with a diameter of 1.8 (ff) and a depth of 10 (home) is made with a width of 3 [
Machining my steel plate (armature) was extremely difficult, and the drilling process required a long time because the processing speed could not be increased. Incidentally, since the hole (lla) of the connecting member is formed by casting the connecting member (I+), there is no such difficulty.

This invention was made to solve the above-mentioned problems, and the purpose of this invention is to create a polar electromagnet having an armature that does not require drilling holes in the armature and is easy to process. [Means for Solving the Problems] A polarized electromagnet according to the present invention has a concave portion in the center of the armature, and engages with this concave portion to freely rotate the armature. A supporting protrusion is provided on the main body frame.

[For production]

In this invention, the armature is provided with a recessed portion and a protruding portion that engages with the recessed portion to support the armature. can be rotatably supported.

[Embodiments of the invention]

Hereinafter, a first embodiment of the present invention will be explained.

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a sectional view of a coil winding frame, and FIG. 2 is a perspective view of an armature. In the figure, (11) is a connecting portion, which is similar to the conventional device described above. (Support) is an armature, and a recessed portion (28a) is provided on the side surface f of the central portion of the armature as shown in the figure. The reason is that the coil winding frame made of synthetic resin has a protrusion (27a), and the protrusion (□□□) is provided at the center of the winding frame surface and engages with the recess (28a) of the armature.

The protruding portion (T) is made of elastic synthetic resin and is manufactured by casting it integrally with the winding frame into a shape that makes it easy to utilize the elasticity as shown in the figure. Note that (301 is the winding of the coil).

Next, the first method of engaging the armature (support) and the protrusion will be explained. The armature (support) shown by the dashed line in FIG.
is inserted into the winding frame groove so as to face the protruding part (2) of the winding frame, and pushed in until the concave part (28a) comes to the center part (F) of the winding frame surface. At this time, since the protruding part is made of an elastic material and has the shape shown in the figure, the armature tuft) can be inserted.
Turn the armature by bending it in the direction of the arrow ■ in the random diagram.
The recessed portion (28a) of the 1a machine allows the insertion of the
When it engages with the reel, it returns to its original state and the protrusion (2
7a), and supports it rotatably by sandwiching an armature (support) therebetween. The armature (
The support is driven by the same principle as explained in the above conventional example, and performs a reversal operation from one stable state to the other stable state. The range of rotation of the armature (support) due to this reversal operation is indicated by the arrow -)E in the figure. Note that the inner center part of the winding frame is not absolutely essential.

3 to 5 show other embodiments of this invention,
FIG. 3 is a sectional view of the winding frame of the coil, FIG. 4 is a perspective view of the armature, and FIG. 5 is a sectional view showing details of the state of engagement between the armature and the protrusion. In the figure, (81 is an armature, which has a round hole (48a) in the center which is a recessed part as shown in the figure. (47) is a synthetic resin winding frame, and 9 is a winding frame. (
47) is a protruding part provided in the central part E that engages with the round hole (48a) of the armature and supports the armature part rotatably by sandwiching it between the protrusion (47a) of the winding frame. . Projection part (491
The spherical body (49a) that engages with the round hole (48a), the coil spring (49k)), and the plug (49C) are connected to the tube (4) as shown in the figure.
9-d) When the armature (c) is inserted into the winding frame (47), the coil spring (49b) is compressed by being pushed by the armature (48), and the spherical body (49a) ) moves to the right in the figure and the round hole (48a) comes to the center, as shown in Figure 5, the round hole (48a) and the spherical body (49
a), and the armature (48) is sandwiched and rotatably supported between the protrusion (47a) of the winding frame. In the embodiment of the above function, the armature (48) is connected to the spherical body (49a). ), the depth of the round hole (48a) can be shallow, and there is also the advantage that it can be easily machined with a drill.

In addition, in each of the above embodiments, the protruding portion ■i, +4
Since the winding frame H, (4
7) and the armature (support), (48) is engaged with the armature (
2) and (4, 8) can be simply inserted, which has the effect of simplifying assembly.

FIG. 6 is a sectional view of a winding frame showing still another embodiment,
(67) is a synthetic resin winding frame, (69) is a winding frame (67)
The recessed part (28a) of the armature (support) is provided in the center of the
(Fig. 2) is a protruding part that engages with and rotatably supports the screw. In this embodiment, the armature α is connected to the winding frame (671
After being inserted into the armature, the screw book is screwed in and engaged with the recessed portion (28a) to rotatably support the armature (support).

In each of the above embodiments, the armature (support) (48) is provided with a recessed portion on one side, but as shown in FIG. ).

(88b) may be provided, or the structure and shape of the recessed portion and the protruding portion may be combined in combination with the structure and shape of the protruding portion within a range that does not impair the object of the present invention.

Further, the armature may have a rectangular cross-sectional shape (although I have mentioned this in detail, the same effect can be achieved with a circular or other cross-sectional shape, and the material may be a soft iron plate or other magnetic material.

Note that the winding frame surface (47) of the coil need not be made of synthetic resin but may be made of a non-magnetic material; in this case, the protrusion in the above embodiment (Fig. It may be designed as appropriate, such as by configuring the shape with another elastic material.

Note that the protrusion may not be provided on the winding frame, but may be provided directly on the main body frame. In this case, for example, two upper and lower coils may be placed between the protrusion to excite the armature. .

Alternatively, instead of using the permanent magnet f21 (3), an excitation coil is provided and a current is constantly passed through the excitation coil (I may also be used to create a magnetic flux).

〔Effect of the invention〕

As explained above, this invention has a recessed portion in the center of the armature, and the armature is rotatably supported by the protruding portion that engages with the recessed portion. This has the advantage that no hole machining is required.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a sectional view of a coil winding frame, Figure 2 is a perspective view of an armature, and Figures 3 to 5 are a sectional view of a coil winding frame. Another embodiment of the invention is shown in which Fig. 3 is a cross-sectional view of a coil winding frame, Fig. 4 is a perspective view of an armature, and Fig. 5 shows a state of engagement between the armature and a protrusion. 6 is a sectional view of a winding frame showing still another embodiment, FIG. 7 is a perspective view of an armature showing still another embodiment, and FIGS. 8 to 10 are conventional polarized electromagnets. An example is shown in Fig. 8 is a perspective view of a polar electromagnet, Fig. 9 is a perspective view of an armature,
FIG. 10 is a perspective view showing the principle of operation. In the figure, (1) is the main body frame, (support), (48), (
881 is the armature, (28a) is the recessed part, (48a) is the round hole, (88a) and (88b) are the recessed parts, (4ω
(The fin is a screw. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a polarized electromagnet having an armature whose central part is supported by a main frame and has two magnetically stable states and is driven from one state to the other, a recessed part is provided in the central part of the armature. A polarized electromagnet characterized in that a protrusion that engages with the recess is provided on the main body frame to rotatably support the armature.