JPH0563008U - Electromagnet device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a seesaw-type electromagnet device with low operating noise. [Structure] A yoke 1 formed of a central piece 1a, opposite magnetic pole pieces 1b and 1c, and a central magnetic pole piece 1d standing upright in parallel with the opposite magnetic pole pieces 1b and 1c at the center of the central piece 1a, and a yoke. 1 middle piece 1a
The coil 2 wound around the armature 3 and the armature 3 that pivots like a seesaw with the central portion 3a rotatably supported at the end of the central magnetic pole piece 1d of the yoke 1, and one of the magnetized pole faces. The magnetic pole plates 4a, 4b provided have permanent magnets 4, 5 respectively fixed to both ends 3b, 3c of the armature 3 so that they can be brought into contact with and separated from the opposing magnetic pole pieces 1b, 1c of the yoke 1. There is. Therefore, the armature 3 becomes heavier by the amount of the permanent magnets 4 and 5 and moves in a seesaw motion, and the operation speed thereof becomes slower, and the magnetic pole plates 4a and 4b become the opposite magnetic pole pieces 1b and 1 of the yoke 1.
The operation noise when abutting against c and colliding is also reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seesaw-type electromagnet device used for a polarized relay or the like.

[0002]

[Prior Art]

 Conventionally, there are the following electromagnet devices of this type, which will be described with reference to FIG.

Reference numeral A denotes a yoke, which is made of a magnetic material such as electromagnetic soft iron and is formed in a U-shape by the central piece A ₁ and the opposing magnetic pole pieces A ₂ , A ₃ .

B is a permanent magnet, and one end of the magnetized longitudinal direction is fixed to the center of the central piece A ₁ of the yoke A, and is erected in parallel to both opposing magnetic pole pieces A ₂ and A ₃ .

C is a coil, which is wound around the center piece A ₁ of the yoke A via a coil frame C ₁ . Specifically, since the permanent magnet B is erected in the center of the center piece A ₁ , the permanent magnet B is wound separately on both sides of the permanent magnet B. Has been done.

[0006] D is an armature, which is formed of a magnetic material such as electromagnetic soft iron into a substantially flat plate shape, and the central portion D _{1 of which} is fitted with a semi-circular concave portion at the other end of the permanent magnet B. It is supported rotatably and rotates like a seesaw, so that both ends D ₂ and D ₃ can come into contact with and separate from both facing magnetic pole pieces A ₂ and A ₃ of the yoke A. It constitutes a seesaw-type electromagnet device.

The operation will be described. Now, when the permanent magnet B is magnetized as shown in the figure, the armature D has an N pole. Here, when the coil C is excited in the specified direction so that the opposite pole pieces A ₂ and A _{3 of} the yoke A become the S pole and the N pole, respectively, the armature D has the opposite end D ₂ Is attracted to one of the opposing magnetic pole pieces A ₂ and the other end D _{3 of} the same pole is repelled from the other opposing magnetic pole piece A _3, so that the central portion D ₁ is used as a fulcrum to rotate in a seesaw motion. The one end D ₂ comes into contact with one of the opposing magnetic pole pieces A ₂ . In this state, even if the coil C is not excited, the magnetic flux of the permanent magnet B forms a closed magnetic circuit, and thus is held as it is. If the exciting direction of the coil C is made opposite to the above, the armature D will likewise perform a seesaw motion and reverse with the reverse action.

[0008]

[Problems to be solved by the device]

In the above-described conventional seesaw-type electromagnet device, when the coil C is excited in the specified direction, the armature D rotates in a seesaw motion with the center portion D ₁ rotatably supported as a fulcrum. , Both ends D ₂ and D ₃ come into contact with and separate from the opposite pole pieces A ₂ and A ₃ of the yoke A, but since the armature D is a light plate-shaped member, The operation speed is _high , and the operation noise when both ends D ₂ and D ₃ come into contact with and collide with the opposing magnetic pole pieces A ₂ and A ₃ of the yoke A becomes loud.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a seesaw-type electromagnet device having a low operation noise.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, an electromagnet device according to claim 1 of the present invention comprises a central piece, a pair of opposing magnetic pole pieces, and a central magnetic pole piece erected parallel to the opposing magnetic pole pieces at the center of the central piece. , A coil wound around the center piece of the yoke, an armature that is rotatably supported at the center by the ends of the center pole piece of the yoke, and rotates like a seesaw, One of the magnetized magnetic pole surfaces has permanent magnets fixed to both ends of the armature so as to be able to come into contact with and separate from both opposing magnetic pole pieces of the yoke.

Further, the electromagnet device according to a second aspect of the present invention includes a yoke formed of a central piece, both opposing magnetic pole pieces, and a central magnetic pole piece standing upright in parallel with the opposing magnetic pole pieces at the center of the central piece, A coil wound around the center piece of the yoke, and a permanent magnet that rotates like a seesaw, with the center of one magnetized pole surface rotatably supported at the end of the center pole piece of the yoke. , An armature fixed to the other magnetic pole surface of the permanent magnet so that both ends thereof can be brought into contact with and separated from the opposite magnetic pole pieces of the yoke.

[0012]

[Action]

 According to the electromagnet device of the present invention, in any of the first and second aspects, the seesaw-moving armature has the permanent magnets fixed on both sides of the central portion which is the fulcrum of its operation. As a result, the armature becomes heavier by the amount of the permanent magnet and moves in a seesaw motion.Therefore, the operation speed is also slowed down, and both ends contact the opposite pole pieces of the yoke and collide with each other. The sound also becomes smaller.

[0013]

【Example】

 A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a yoke, which is made of a magnetic metal material such as electromagnetic soft iron, and is erected in parallel with both the opposite magnetic pole pieces 1b and 1c at the center of the central piece 1a, the opposite magnetic pole pieces 1b and 1c, and the central piece 1a. A central pole piece 1d having a triangular tip portion is formed in a mountain shape.

Reference numeral 2 denotes a coil, which is wound around the central piece 1a of the yoke 1 via a coil frame 2a. Specifically, since the center pole piece 1d is erected in the center of the center piece 1, it is wound separately on both sides of the center pole piece 1d, and both ends in the middle are connected and connected in series. It is being turned.

Reference numeral 3 is an armature, which is formed of a magnetic material such as electromagnetic soft iron into a substantially flat plate shape, and the central portion 3a is rotated by positioning the triangular tip end of the central magnetic pole piece 1d of the yoke 1 in the bending recess. It is freely supported and can be rotated like a seesaw.

Numerals 4 and 5 are permanent magnets, which are formed in a flat plate shape and are magnetized in the plate thickness direction. Then, magnetic pole plates 4a and 5a are adhered to one magnetic pole surface magnetized to the N pole, and the other magnetic pole surface magnetized to the S pole is applied to both end portions 3b, 3b of the armature 3. Each of them is fixed to 3c so that one magnetic pole surface, more specifically, the magnetic pole plates 4a, 5a can be brought into contact with and separated from both opposing magnetic pole pieces 1b, 1c of the yoke 1.

Next, the operation will be described. Now, as shown in FIG. 2 (a), when the coil 2 is excited in the specified direction so that the opposite pole pieces 1b and 1c of the yoke 1 become the S pole and the N pole, respectively, the pole plate 4a, Since 5a is magnetized to the N pole by the permanent magnets 4 and 5, respectively, the magnetic pole plate 4a having the different pole is attracted to one opposing magnetic pole piece 1b, and the magnetic pole plate 5a having the same pole is opposite the other magnetic pole. By being repelled by the piece 1c, the armature 3 rotates in a seesaw motion with the central portion 3a as a fulcrum, and the magnetic pole plate 4a abuts on one of the opposing magnetic pole pieces 1b. In this state, even if the coil 2 is not excited, the magnetic flux of the permanent magnet 4 forms a closed magnetic path, so that it is held as it is. Further, as shown in FIG. 2 (b), if the exciting direction of the coil 2 is reversed, the armature 3 is also turned around by the seesaw motion due to the opposite action.

Next, a second embodiment will be described below with reference to FIGS. 3 and 4. This is the same in the yoke 1 and the coil 2 as in the first embodiment, but is different in the configurations of the armature 3 and the permanent magnet 6 shown below.

The permanent magnet 6 is formed in a flat plate shape longer than the permanent magnets 4 and 5 of the first embodiment, and is magnetized in the direction of the thickness of the beam. A magnetic pole plate 6a is attached to one of the magnetized magnetic pole surfaces, and one magnetic pole surface, specifically, the central portion of the magnetic pole plate 6a is rotatably supported by the tip of the central magnetic pole piece 1d of the yoke 1. It can rotate like a seesaw.

The armature 3 is formed in a flat plate shape longer than the permanent magnet 6, and both ends 3b, 3c of the armature 3 are provided so that both ends 3b, 3c of the yoke 1 can contact and separate from the opposite pole pieces 1b, 1c of the yoke 1. Then, it is fixed to the other magnetic pole surface of the permanent magnet 6.

Next, the operation will be described. Now, as shown in FIG. 3 (a), when the coil 2 is excited in the specified direction so that the opposite pole pieces 1b and 1c of the yoke 1 become the N pole and the S pole, respectively, the armature 3 becomes permanent. Since the magnet 6 is magnetized to the S pole, one end 3b of the armature 3 having a different pole is attracted to one opposing magnetic pole piece 1b, and the other end 3c having the same pole has the other opposing magnetic pole. When the armature 3 is repelled by the piece 1c, the armature 3 rotates in a seesaw motion around the center of the permanent magnet 6 as a fulcrum, and the one end 3b abuts one of the opposing magnetic pole pieces 1b. In this state, even if the coil 2 is not excited, the magnetic flux of the permanent magnet 6 forms a closed magnetic path, and thus is held as it is. Further, as shown in FIG. 3 (b), if the excitation direction of the coil 2 is made opposite to the above, the armature 3 will also perform a seesaw motion and be reversed by the opposite action.

In any one of the first and second embodiments of the electromagnet device, the seesaw-moving armature 3 has permanent magnets on both sides of the central portion serving as a fulcrum of its operation. Since the magnets are in a fixed state, the armature 3 becomes heavier by the amount of the permanent magnets and moves in a seesaw motion. Therefore, the operation speed becomes slower, and in the case of the first embodiment, both pole plates 4a, 4a, In the case of the second embodiment, the operation noise when the both ends 3b and 3c contact and collide with the opposed pole pieces 1b and 1c of the yoke 1, respectively, is reduced.

[0024]

[Effect of the device]

 In the electromagnet device of the present invention, the seesaw-moving armature has the permanent magnets fixed on both sides of the central portion, which is the fulcrum of its movement. As a result, the operating speed becomes slower, and the operating noise when both ends contact and collide with the opposing magnetic pole pieces of the yoke is reduced.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view illustrating an operating state of the above.

FIG. 3 is a partially sectional front view showing a second embodiment of the present invention.

FIG. 4 is a partial cross-sectional front view illustrating an operating state of the above.

FIG. 5 is a partial sectional front view showing a conventional example.

[Explanation of symbols]

 1 Yoke 1a Center piece 1b Opposing pole piece 1c Opposing pole piece 1d Center pole piece 2 Coil 3 Armature 3a Center part 3b End part 3c End part 4 Permanent magnet 5 Permanent magnet 6 Permanent magnet

Claims (2)

[Scope of utility model registration request] 1. A yoke formed of a central piece, both opposing magnetic pole pieces, and a central magnetic pole piece standing upright in parallel with the opposing magnetic pole pieces at the center of the central piece, and wound around the central piece of the yoke. A coil, an armature whose central part is rotatably supported at the end of the central magnetic pole piece of the yoke, and rotates like a seesaw, and one magnetized magnetic pole surface can be brought into contact with and separated from both opposing magnetic pole pieces of the yoke. An electromagnet device comprising permanent magnets fixed to both ends of the armature. 2. A yoke formed of a central piece, both opposing magnetic pole pieces, and a central magnetic pole piece standing upright in parallel with the opposing magnetic pole pieces at the center of the central piece, and wound around the central piece of the yoke. A coil, a permanent magnet whose central portion of one magnetized magnetic pole surface is rotatably supported by an end portion of the central magnetic pole piece of the yoke, and which rotates like a seesaw, and opposite end magnetic pole pieces of the yoke. And an armature fixed to the other magnetic pole surface of the permanent magnet so that the armature can be brought into and out of contact with the electromagnet.