JPH0563005U - Electromagnet device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an electromagnet device capable of reducing the collision noise of the armature without reducing the displacement of the armature or reducing the magnetic attraction force to the armature. [Structure] A cushioning member 5 is formed by bending the electromagnetic coil 2 such that the plane shape is a C-shape with a thin spring plate material and the maximum outer modulus is bent to be slightly smaller than between the opposing pieces 3b and 3c of the armature 3. During the operation of the armature 3, it moves in the bending direction while acting as a resistance against the displacement of the armature 3 due to its spring force, and one of the opposing pieces 3b or 3c of the armature 3 is moved to the yoke.
It was arranged so as to move to a position not existing between the central leg piece 1a of 1 and the stationary state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnet device suitable for application to, for example, an electromagnetic relay.

[0002]

[Prior Art]

 As this type of electromagnet device, there is one having a configuration shown in FIG. In the figure, 1 is an E-shaped yoke having a central leg piece 1a and opposing leg pieces 1b, 1c, 2 is an electromagnetic coil wound around the yoke, and 3 is a U-shaped piece having opposing pieces 3b, 3c. The U-shaped armature that is shaped like a U and has a permanent magnet 4 inserted therein, and S is a buffer member made of an elastic material such as resin or rubber provided on the central leg 1a. In this armature 3, by controlling the excitation of the electromagnetic coil 2, the opposing pieces 3b and 3c alternately come in contact with and separate from at least the central leg piece 1a (finely via the buffer member S) (for example, the actual opening 63- 133047).

In such an electromagnet device, if the cushioning member S is not provided, the facing pieces 3b and 3c of the armature 3 come into direct contact with the central leg piece 1a, that is, collide with each other, and generate a collision sound. When an electromagnetic relay incorporating this electromagnet device is installed in household electrical equipment or in-vehicle electrical equipment, this collision noise is not desirable, and therefore such a cushioning member is used as a means of reducing this collision noise. Various proposals have been made including S.

[0004]

[Problems to be solved by the device]

 Although the above-mentioned electromagnet device is effective in reducing the collision noise, since the cushioning member has a certain thickness, the displacement of the armature is reduced and the armature comes into contact with the central leg piece ( In the stationary state (finely via the cushioning member S), a comparatively large magnetic gap is generated between the two, which causes another problem such as a decrease in magnetic attractive force.

The present invention has been made in view of such circumstances, and an object of the present invention is to reduce the amount of displacement of the armature and the collision of the armature without reducing the magnetic attraction force to the armature. An object is to provide an electromagnet device capable of reducing sound.

[0006]

[Means for Solving the Problems]

 In order to solve such a problem, the electromagnet device of the present invention comprises a cushioning member formed by thin spring plate material such that the planar shape is C-shaped and the maximum outer diameter is slightly smaller than between the opposing pieces of the armature. , The armature moves in the bending direction while acting as a resistance against the displacement of the armature due to the spring force of the armature, and when one of the opposing pieces of the armature is in contact with the central leg piece and does not exist between them, It is arranged so as to move to the position.

[0007]

[Action]

 According to this structure, during the operation of the armature, the displacement speed of the armature is reduced by the spring force of the cushioning member, and the impact force when the opposing piece collides with the central leg piece of the yoke is weakened. There is no magnetic gap between the two in contact with the center leg of the yoke.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example described above are designated by the same reference numerals.

Reference numeral 1 denotes a yoke, which has an E-shape composed of a central leg piece 1a, opposing leg piece pieces 1b and 1c, and a connecting piece 1d. The end of the central leg piece 1a is preferably chamfered. Reference numeral 2 is an electromagnetic coil, which is wound around the center leg piece 1a of the yoke 1.

Reference numeral 3 denotes an armature, which is a U-shaped connecting piece composed of the facing pieces 3 b and 3 c and the permanent magnet 4. In the armature 3, the distance between the facing pieces 3b and 3c is approximately equal to the distance between the central leg piece 1a and the facing pieces 1b and 1c, and each facing piece 3b and 3c has the central leg piece 1a and the facing leg pieces. It is located between 1b and 1c and is supported by an appropriate rotating member (not shown). The permanent magnet 4 may be inserted in a part of the U-shaped portion. By controlling the excitation of the electromagnetic coil 2 (for example, changing the current direction), the armature 3 causes the facing pieces 3b and 3c to alternately contact and separate from at least the central leg piece 1a. In this case, the opposing leg pieces 1b and 1c may be simultaneously brought into contact with and separated from each other.

Reference numeral 5 denotes a buffer member, which is a thin spring plate material such as phosphor bronze having a plate thickness of about 0.03 mm, has a C-shaped plane, and has a maximum outer diameter slightly smaller than that between the opposing pieces 3b and 3c. It is bent and formed. Then, the open portion is made to correspond to the central leg piece 1a of the yoke 1, and is placed in the minute gap between the permanent magnet 4 and the guide pin 6 provided on the rotating member (not shown) in the vicinity of the permanent magnet 4. It is fitted so that it can move freely. Therefore, the buffer member 5 moves in the bending direction in the minute gap between the guide pin 6 and the permanent magnet 4 while acting as a resistance against the displacement of the armature 3 due to its spring force during the operation of the armature 3. Further, when one of the opposing pieces 3b or 3c of the armature 3 comes into contact with the central leg piece 1a and stands still, the armature 3 moves to a position that does not exist between the two pieces 1a, 3b or 3c.

The armature 3 and the cushioning member 5 operate as shown in FIGS. 3 (a) to 3 (d). (a) is a state in which one facing piece 3b is in contact with the central leg piece 1a and is stationary, and one end 5a of the cushioning member 5 does not exist between the two 1a and 3b. Further, the spring force of the buffer member 5 is not acting. However, the other end 5b of the cushioning member 5 exists between the central leg piece 1a and the other facing piece 3c forming a large gap.

When the electromagnetic coil 2 is excited to displace the armature 3 in this state, the armature 3 moves in the direction of the arrow X, and the second half of the operation, that is, the other facing piece 3c contacts the central leg piece 1a. Before, as shown in (b), the both ends 1a, 3c sandwich the other end 5b of the cushioning member 5. At this time, the cushioning member 5 acts as a resistance against the displacement of the armature 3 due to its spring force, but since one end 5a is free, it bends in the minute gap between the guide pin 6 and the permanent magnet 4. Move (arrow Y direction). Therefore, after the state of (c), the state of (d), that is, the other facing piece 3c comes into contact with the central leg piece 1a and stands still. Then, in this state, the other end 5b of the cushioning member 5 is moved to a position where it does not exist between the other facing piece 3c and the central leg piece 1a. In the case of displacing the armature 3 in the opposite direction, when the electromagnetic coil 2 is excited so that the current directions are opposite, the same operation is performed in the order of (d) to (a).

By such an operation, the impact force at the time of colliding with the central leg piece 1a of the armature 3 can be weakened and the collision noise can be reduced. Since no magnetic gap is generated between the two when in contact with, the displacement of the armature is not reduced and the magnetic attraction force to the armature is not reduced.

FIG. 4 and FIG. 5 show an electromagnetic relay with improved silent performance, which is applied by slightly modifying this electromagnet device. The yoke 1 is composed of a central leg piece 1a, opposing leg pieces 1b and 1c, and a connecting piece 1d, and an electromagnetic coil 2 is formed on the central leg piece 1a via a coil frame B having three terminals T1, T2, and T3. Is wrapped around. The armature 3 is composed of opposing pieces 3b and 3c and a permanent magnet 4, and is supported by a rotating member M pivotally supported by the coil frame B. The guide pin 6 is supported by the rotating member M by press fitting or the like, and the shock absorbing member 5 is movably fitted in a minute gap formed by this and the permanent magnet 4. Further, the cushioning member 5 is also regulated in position by the rotating member M and the yoke 1 and does not fall off. Reference numeral 11 is a main switch, and the contact of the movable contact plate 13 driven by the rotating member M is brought into contact with or separated from the contact of the fixed contact plate 12. Reference numeral 14 is an auxiliary switch, and the contact of the movable contact plate 16 driven by the rotating member M contacts and separates with the contact of the fixed contact plate 15. Reference numeral 17 designates a base for fixing the yoke 1, fixing the respective contact plates 12, 13, 15, 16 and terminals T1, T2, T3 of both switches 11, 14 through, and covering with a cover 18.

The cushioning member 6 does not need to have a C-shaped shape as a part of a perfect cylinder, and the material is preferably non-magnetic. In addition, the end shape may be deformed for more reliable movement. Further, a stopper may be provided to deform the end shape and lock the end shape in order to restrict unnecessary movement in the bending direction.

[0017]

[Effect of the device]

 In the electromagnet device of the present invention, the displacement speed of the armature is reduced by the spring force of the cushioning member during the operation of the armature, and the impact force when the opposing piece collides with the central leg piece of the yoke is weakened. When the opposing piece is in contact with the central leg of the yoke, there is no magnetic gap between the two, so the displacement of the armature is reduced, and the collision noise of the armature is generated without reducing the magnetic attraction force to the armature. It can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the cushioning member.

FIG. 3A to FIG. 3D are explanatory diagrams of the operation.

FIG. 4 is a perspective view of an electromagnetic relay in which the electromagnet device of the present invention is partially modified and applied.

FIG. 5 is an exploded perspective view thereof.

FIG. 6 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Yoke 2 Electromagnetic coil 3 Armature 4 Permanent magnet 5 Buffer member 6 Guide pin

Claims (1)

[Scope of utility model registration request] 1. An E-shaped yoke having a central leg piece and an opposing leg piece, an electromagnetic coil wound around the central leg piece, and a U-shaped permanent magnet having an opposing piece. In an electromagnet apparatus including an armature, in which each opposing piece alternately comes in contact with and separates from at least a central leg piece by controlling excitation of an electromagnetic coil, a plane shape of a thin spring plate material is C The cushioning member, which is bent like a letter and has a maximum outer diameter slightly smaller than the distance between the opposing pieces, moves in the bending direction while acting as a resistance against the displacement of the armature due to the spring force of the armature during the operation of the armature. An electromagnet device, wherein one of the opposing pieces is arranged so as to move to a position that does not exist between the two when the one facing piece contacts the central leg piece and is stationary.