JPH0622963Y2 - Rotary solenoid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a rotary solenoid used for an electric lock or the like.

[Prior Art] Recently, a rotary solenoid has been used for an electric lock or the like, and such a rotary solenoid has a structure as shown in FIG. 2, FIG. 2a, and FIG. , A pair of rotor balls 100d, 100d are attached to the outside of a core material 100b having a drive shaft 100a at the center through permanent magnets 100c, 100c so as to form a counter pole to form a two-pole rotor 100. The two-pole rotor 100 is arranged in the gap 103 of the two-pole stator in which the electromagnetic coil 102 is wound around the yoke 101.

By the way, in the two-pole rotor 100 of such a rotary solenoid, the permanent magnet 100c,
After the 100c and the rotor balls 100d, 100d are attached, the outside is covered with a resin and simultaneously molded as a block body.
As shown in FIG. 3b, a gap (a) is likely to be formed in the joint portion, and in this case, there is a problem in that the accuracy of the outer dimensions of the rotor 100 deteriorates and the axial thickness increases. Was there. It should be noted that FIGS. 3a and 3b show a cross section and a vertical section of the rotor coated with resin, respectively.

[Problems to be Solved by the Invention] The present invention has been made in view of the structure of the conventional rotary solenoid having the above-mentioned structure. It is an object of the present invention to provide a rotary solenoid that can obtain a rotor that is small in size and has high adhesive strength.

[Means for Solving the Problems] In the present invention proposed to achieve the above object, in forming a two-pole rotor, a concave groove is formed in a portion of a permanent magnet sandwiched by a core material and a pair of rotor balls. Then, by temporarily magnetizing the permanent magnets in advance, one set of rotor balls is temporarily fixed to each of the outer sides of the core material so as to sandwich the permanent magnets, and then an adhesive is applied in the groove. Is filled and fixed and integrated.

Further, in the preferred embodiment of the present invention, an ultraviolet curable adhesive which is cured by irradiation of ultraviolet rays is used as the adhesive to reduce the time required for the manufacturing process.

[Operation] In the present invention, since the concave groove is formed in the portion of the permanent magnet sandwiched between the core material and one set of rotor balls, the concave groove portion is filled with the adhesive and fixed. It is possible to obtain a product with high strength by reducing the external dimensions.

Moreover, in manufacturing, the permanent magnet is temporarily magnetized,
Since the assembly parts are fixed and then the whole is fixed by using the adhesive, positioning adjustment is easy, and voids are not easily generated in the joint portion, which has various advantages.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows that the permanent magnets 1c, 1c are temporarily magnetized to form the core material 1.
b, the rotor balls 1d, 1d are fixed, and in this state, after positioning and adjusting all parts, as shown in FIG. 1a, the concave grooves formed on both sides of the permanent magnets 1c, 1c are shown. The permanent magnets 1c, 1c, the core material 1b, and the rotor balls 1d, 1d are fixedly connected to each other by applying the adhesive 1e so as to fill 1f ...

As the adhesive used at this time, in addition to the thermosetting adhesive,
From the viewpoint of workability, an ultraviolet curable adhesive is preferable.

[Advantages of the Invention] According to the present invention, it is possible to easily obtain a rotary solenoid having a rotor having a small outer size and high strength.

[Brief description of drawings]

FIG. 1 is an explanatory view of a state where the rotor of the present invention is temporarily fixed, 1a
FIG. 1 is an explanatory view of a completed state of the rotor of the present invention, FIG. 1b is a cross sectional view thereof, FIGS. 2 and 2a are structural explanatory views of a rotary solenoid, and FIG. 3 is a structural explanatory view of a conventional rotor, FIGS. 3a and 3b are respectively a longitudinal section of a conventional rotor,
FIG. [Explanation of Codes] 1 ... 2-pole rotor 1a ... Drive shaft 1b ... Core material 1c ... Permanent magnet 1d ... Rotor ball 1e ... Adhesive agent 1f ... Recessed groove

Claims (2)

[Scope of utility model registration request] 1. A two-pole rotor formed of electromagnets, wherein a pair of rotor balls are formed by attaching a pair of rotor balls to each of the outer sides of a core member having a drive shaft at the center through a permanent magnet forming a counter pole. In the rotary solenoid having a structure arranged in a gap of a pole stator, in the two-pole rotor, a permanent magnet portion sandwiched by the core material and a set of rotor balls forms a concave groove, By temporarily magnetizing the magnets in advance, one set of rotor balls is temporarily fixed to each of the outer sides of the core material so as to sandwich the permanent magnets, and then the concave groove is filled with an adhesive to be fixedly integrated. A rotary solenoid with a different structure. 2. The rotary solenoid according to claim 1, wherein the adhesive has ultraviolet curability.