JPS6161408A - Polarized electromagnet device - Google Patents

Abstract

PURPOSE:To reduce the operational sound of a moving body and to obtain the titled electromag net device having retentive strength and self-maintaining function when it is being operated by a method wherein the moving body is displaceably provided at the position depending on the flowing direction of magnetism of a permanent magnet piece and an elastic body is arranged on one end side of the permanent magnet piece of the moving body. CONSTITUTION:An electromagnet device is composed of a movable core 21 as a moving body which can be moved in axis direction, an electromagnetic coil 22 with which the movable core 21 is excited, a permanent magnet piece 23 arranged on one end side of the electromagnetic coil 22 and an elastic body 24 arranged facing to one end side in moving direction of the movable core 24. When the electromagnetic coil 22 is excited, the magnetic flux phi2 of the electromagnetic coil 22 and the magnetic flux phi1 of the permanent magnet piece 23 are superposed each other in a magnetic gap C, and the movable core 21 is shifted in the direction shown by the arrow W in the diagram. The end face 44 of the elastic body 24 and the right end face 21b of the movable core 21 are contacted, and the movement of the movable core 21 is stopped. At this time, as the impact of the movable core is absorbed and alleviated by the elastic body 24 and the movement of the movable core 21 is stopped, the operational sound of the movable core 21 is reduced, and the movable core 21 is maintained by the magnetic attraction force of the magnetic flux phi1 of the permanent magnet piece 23.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a magnetic circuit that can be used as a moving body by interposing a permanent magnet piece in a magnetic circuit and superimposing the magnetic flux of an electromagnetic coil on the magnetic flux of the permanent magnet piece to attenuate it. ! Jkk, polarized type 1 that allows the heart to move back and forth and also reduces the operating noise of the Wh iron core! Relating to a magnet device.

BACKGROUND ART A typical prior art is the Utility Model Application Publication No. 47-2245, as shown in Figure 5.
9 exists. In this prior art, a muffling solenoid 1 has a convex movable core 2 whose distal end is tapered with stepped dimensions, and a concave fixed core 3 having a shape corresponding to the convex movable core 2. A groove 4 of an appropriate depth is drilled around the entire circumference of the first step dimension at the tip of the town vJ iron core 2, and this narrow r! I44
A ring-shaped sound deadening material 5 such as a JC rubber washer is attached to the bottom. When the coil 6 is energized and the movable core 2 is displaced in the direction in which the tip end 2a of the movable core 2 approaches the recess 3a of the fixed core 3 as shown in FIG. t5 collides with the inner surface 31) of the fixed iron core 3a. Therefore, the impact sound is absorbed and buffered by the sound deadening material 51C.

Problems to be Solved by the Invention In the prior art described above, the thickness of the sound deadening material 5 is so thin that a sufficient sound deadening function cannot be exhibited. Therefore, if the thickness of the sound deadening material 5 is ensured sufficiently in order to exert its muffling ability, there may be a problem that the holding force is insufficient.

The purpose of the present invention is to solve the above-mentioned technical problems, to reduce the operating noise of a moving body, to have a holding force during operation, and to have a self-holding function by interposing a permanent magnet piece. An object of the present invention is to provide a polarized electromagnet device.

Means for Solving the Problems Between S and C The present invention comprises: an electromagnetic coil; a permanent magnet piece disposed on one end side of the electromagnetic coil and magnetized in the radial direction; a moving body displaceable in the axial direction and made of a ferromagnetic material, the movable body being displaceable to a position depending on the direction of magnetic flow of the permanent magnet piece, further comprising a permanent magnet of the moving body; This is a polarized electromagnet device characterized in that an elastic body is placed facing one end of the biased side.

Function According to the present invention, by switching the F5h magnetic current of the electromagnetic coil, magnetic fluxes are superimposed and attenuated each other in the magnetic gap formed between the moving body and the permanent magnet piece, and the moving body f
- Move. Then, the movable body collides with an elastic body on one end side of the VC and stops. At this time, since the impact of the cutting body is absorbed and alleviated by the elastic body, the operating noise of the moving body is reduced as much as possible.

Embodiment FIG. 1 is a sectional view of an embodiment of an electromagnetic device according to the present invention, and FIG. 2 is a partial perspective view thereof.

This 'Jl magnet device 20 has, as basic components, a movable iron core 21 as a movable body movable in the axial direction, an electromagnetic coil /l/22 that excites the movable iron core 21, and one end side of the electromagnetic coil /v22. a permanent magnet piece 23 disposed on the right end side in FIG. 1; and one end in the moving direction of the movable iron core 21;
An elastic body 24 arranged facing the side and the permanent magnet piece 2
3 and an electromagnetic coil/L/22, and a U-shaped outer yoke 25 having an insertion hole 25d and a bottom piece 25C. The iron core 21 has a cylindrical shape and is made of ferromagnetic material.

This movable iron core 21 is disposed within an insertion hole 27 formed in the carp μ frame 26 so as to be able to freely reciprocate.

One end of the return spring 80 is fixed to a hole 81 drilled from one end of the town 9J iron core 21 (left side in FIG. 1).
, the other end of the spring 80 is fixed to the fuselage 82vc. In addition, an elastic body 24 made of rubber or the like is arranged on the right side of the town 1 young iron core 21 in @1 diagram.
4 is placed through the insertion hole 43 of the fixed iron core 42.

The carp y frame 26 is attached to the cylindrical part 2 as shown in Figure @2.
8 and three 7 flange portions 31, 32 and 33 formed on the outer peripheral surface of the cylindrical portion 28.

flange part 31, 7 flange part 32, 7 lange g63
3 are formed in this order from one end to the other end of the cylindrical portion 28. The left side surface of the flange portion 31 and the inner side surface of the bottom piece 25C of the outer yoke 25 are in contact with each other, and an anal magnetic coil 22 is wound between the seven flange drivers 31 and 32.

In addition, there are 23 permanent magnet pieces on the flange parts 32 and 33.
is intervening. An outer yoke 25 is arranged surrounding the electromagnetic coil 1v22 and the permanent magnet piece 23.

On the right end side of the outer yoke 25, there is a side plate 3 made of a non-magnetic material.
6 is provided. The side plate 36 has a pair of left and right side portions ae.
@, aab, and a connecting portion 38C that connects the wound portion 361.36b, and the connecting portion 36C includes an insertion hole 36d.
are formed, and a pair of left and right locking protrusions 36e are formed. Engagement recesses 38 corresponding to the locking protrusions 36e are formed in the outer yoke 25, and the engagement protrusions 3 (36) are engaged with and caulked into the engagement recesses Fvr38. In this way, the small diameter portion 41 of the elastic body 24 is pushed through and fixed to the through hole 36d of the mouth side [3B where the outer yoke 25 is fixed to the side plate 36. The left side surface 44 is located at the fixed iron core 42.
It is configured to protrude from the left side surface 42a of the.

Therefore, as will be described later, when the town vJ iron core 21 moves in the direction of the arrow W, when the right end surface 21b of the town vJ iron core 21 collides with the elastic body 24, the collision sound is absorbed by the elastic body 24.
eased.

The permanent magnet piece 23 is magnetized in a direction perpendicular to the moving direction of the movable iron core 21, and one of its north poles is in contact with the upper and lower pieces 25m and 25b of the outer yoke 25, and the other south pole is in contact with the fixed iron core 42. is facing.

An electromagnet device having such a configuration [20VC case,
As is clear from FIG. 1, a magnetic gap B is formed between the bottom piece 25C of the outer yoke 25 and the movable iron core 21. Furthermore, a drowsy gap C is formed between the fixed iron core 42 and the movable iron core 2].

3 and 4 are diagrams for explaining the operating state of the electromagnet device 20. FIG. In Fig. 3, the permanent magnet piece 23
The magnetic flux φ1 flows through the following path. That is, the magnetic flux φ1 is N of the permanent magnet piece 23 [→ 25 m of the upper and lower pieces of the outer yoke 25
, 25b→bottom piece 25C of outer yoke 25−magnetic gap B−movable iron core 21-1+li contact gap C−fixed iron core 42→S pole of Hyaku magnet piece 23 is traced. When the electromagnetic coil 1v22 is energized and in a closed state, as shown in FIG. 3, the variable σ iron core 21 is maintained in a stopped state due to the Bh load of F280. When the magnetic coil 22 reaches 11 in this state, the magnetic flux φ2 forms a magnetic circuit shown by the broken line in FIG. Fixed iron core 42 - permanent magnet piece 23b - upper and lower pieces 25a, 25b of outer yoke 25
- The bottom piece 25C of the outer yoke 25 becomes a magnetic gap B. Therefore, in the magnetic gap C, the magnetic flux φ2 of the electromagnetic coil/L'22 and the magnetic flux φl of the permanent magnet piece 23 are superimposed on each other, so that the movable iron core 21 moves in the direction of the arrow W. Then, as shown in FIG. 4, the end surface 44 of the VC elastic body 24 and the right end surface 21b of the movable iron core 21 come into contact with each other, and the movement of the movable iron core 21 is stopped. At this time, since the impact of the iron core 21 is absorbed and relaxed by the elastic body 24 and stopped, the operating sound of the movable iron core 21 spreads as much as possible.

As shown in FIG. 4, even if the electromagnetic coil 22 is demagnetized when the movable core 21 is stopped, the movable core 2
] is maintained under this condition.

After that, when the electromagnetic coil/L'22 is reversely excited, the magnetic flux of the electromagnetic coil forms a magnetic flux path in the opposite direction to the above-mentioned φ2 and is attenuated by the magnetic gap C.
The J iron core 21 begins to move in the direction opposite to the direction of the arrow W,
It is again stopped and held in the state shown in Figure 3.

Effects As described above, according to the present invention, the operating noise of the moving body is reduced as much as possible by VC, and moreover, it is possible to have a holding force during operation and to exhibit a self-holding function.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the electromagnet device of the present invention, and FIG.
The figure is a perspective view, FIGS. 3 and 4 are diagrams for explaining the +l1I1 operation of the electromagnetic device, and FIG. 5 is a sectional view of a typical prior art. 20.80...Electromagnetic device, 2]...Movable iron core, 2
2... Electromagnetic coil, 23... Permanent magnet piece, 24...
・Elastic body, 25... Yoke, 26... Coil frame, 4
2...Identification core, 36...Side plate fifth cause procedural amendment January 16, 1985

Claims (1)

[Claims] An electromagnetic coil; a permanent magnet piece arranged at one end of the electromagnetic coil and magnetized in the radial direction; a movable body made of material, the movable body can be displaced to a position depending on the direction of magnetic flow of the permanent magnet piece, and an elastic body is disposed facing one end of the movable body where the permanent magnet is biased. A polarized electromagnet device characterized by: