JPH0668762A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To reduce noise caused by contact point opening and closing operation. CONSTITUTION:In an electromagnetic relay, a mechanism part 1 is supported with a base stand 11, and a case 12 is installed on the base stand 11, and the mechanism part 1 is housed therein. The base stand 11 is composed of a plate part 11a and projecting shape bobbin support parts 11b arranged on this plate part 11a, and the mechanism part 1 is supported with the base stand 11 by installing a bobbin 5 on the bobbin support parts 11b by means of adhesive and so on. In this case, the bobbin support parts 11 are projected from the plate part 11a, and a void part 13 is arranged between the base stand 11 and a yoke 2, so that the base stand 11 and the yoke 2 are put in non-contact condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay.

[0002]

2. Description of the Related Art A conventional general electromagnetic relay will be described with reference to FIG. FIG. 3 is a schematic diagram showing the configuration of a conventional general electromagnetic relay. 3 (a) is a sectional view seen from the front, FIG. 3 (b) is a sectional view seen from the side, and FIG. 3 (c) is a sectional view seen from the back.

In FIG. 3, 1p is a mechanism portion, 2p is a yoke, 3p is a core, 4p is a coil, 5p is a bobbin, 6p is a coil terminal, 7p is an armature, 8p is a permanent magnet, 9p is a fixed contact plate, and 10p is Movable contact plate, 11p is base, 12
p is the case. As shown in FIG. 3, the conventional electromagnetic relay has a mechanism 11p supported on a base 11p, the mechanism 1p is housed, and a case 12p is attached to the base 11p.

The mechanical portion 1p has a bobbin 5p having a core 3p inserted in the hollow portion and a coil 4p wound around the outer periphery of the hollow portion.
And one is attached to one end of the core 3p and the other is attached to the core 3p.
The yoke 2p extending toward the other end of p, the armature 7p that is attached to the yoke 2p so as to be rotatable in the suction / separation direction with respect to the other end of the core 3p, and between the other end of the core 3p and the armature 7p. Arachiya 7p core 3 placed in
a permanent magnet 8p for holding an attracted state with respect to p,
Fixed contact plate 9p having fixed contact 9q, and movable contact 10
and a movable contact plate 10p having q and connected to the armature 7p.

The mechanism portion 1p is supported on the base 11p with the bobbin 5p and the yoke 2p in contact with each other. In the conventional electromagnetic relay configured as described above, the coil 4 as a whole vibrates due to a shock when the contact opening / closing operation, that is, when the armature 7p is attracted to or separated from the core 3p. This vibration is transmitted to the yoke 2p,
It is transmitted to the base 11p, which is in contact with the yoke 2p, and further to the case 12p. As a result, the acoustic radiation was excited by the vibration of the case 12p, and noise was generated.

An electromagnetic relay that attempts to reduce the generation of such noise is disclosed in [Shokai Sho 62-153737]. This conventional electromagnetic relay will be described with reference to FIG. In FIG. 4, 14p is a sound absorbing material, and the portions having the same reference numerals as those in FIG. 3 have the same functions as those in FIG.

As shown in FIG. 4, the electromagnetic relay has a base 1
The mechanism portion 1p is supported in a state in which the bobbin 5p and the yoke 2p are in contact with 1p, and the case 12p having the sound absorbing material 14p provided on the inner surface is attached to the base 11p to house the mechanism portion 1p. By providing the sound absorbing material 14p on the inner surface of the case 12p, the contact opening / closing operation, that is, the armature 7p
It is intended to reduce the noise generated by the vibration generated by the impact when the is attracted to or separated from the core 3p.

[0008]

However, in the conventional electromagnetic relay configured as described above, although the sound generated directly from the mechanism portion 1p can be reduced, the noise generated during the contact opening / closing operation is reduced. There is a problem in that it is not possible to reduce the sound that is the main cause, that is, the sound that is indirectly generated by the vibration transmitted from the yoke 2p to the case 12p via the base 11p. The yoke 2p is made of a metal having a low vibration damping rate, so that the vibration of the yoke 2p is slightly damped, and the case 2 passes through the base 11p.
Since it was transmitted to the p., it was the main cause of noise.

In view of the above problems, an object of the present invention is to provide an electromagnetic relay that reduces the noise generated by the contact opening / closing operation.

[0010]

According to the electromagnetic relay of the present invention, a mechanism portion is supported on a base by providing a gap between the yoke attached to the core and the base and attaching a bobbin to the base. It was done.

[0011]

According to the structure of the present invention, the mechanical portion is supported on the base by providing the space between the yoke and the base and attaching the bobbin to the base. As a result, the vibration generated in the yoke during the operation of the mechanical section, that is, during the contact opening / closing operation is
It will not be directly transmitted to the base, but will be transmitted from the yoke to the base via the bobbin. Therefore, the vibration propagation distance from the yoke to the case becomes longer than in the conventional case, and the damping rate of the vibration transmitted from the yoke to the case becomes higher.

[0012]

1 is a schematic diagram showing the structure of an electromagnetic relay according to a first embodiment of the present invention. 1 (a) is a sectional view seen from the front, FIG. 1 (b) is a sectional view seen from the side, and FIG. 1 (c).
FIG. 4 is a cross-sectional view seen from the back. In FIG. 1, 1 is a mechanism portion, 2 is a yoke, 3 is a core, 4 is a coil, 5 is a bobbin,
6 is a coil terminal, 7 is an armature, 8 is a permanent magnet, 9 is a movable contact plate, 10 is a fixed contact plate, 11 is a base composed of a flat plate portion 11a and a bobbin supporting portion 11b, 12 is a case, 1
Reference numeral 3 is a void portion.

As shown in FIG. 1, the electromagnetic relay includes a base 1
1, the mechanism unit 1 is supported, the case 12 is attached to the base 11, and the mechanism unit 1 is housed. The mechanical portion 1p includes a bobbin 5 in which a core 3 is inserted in the hollow portion and a coil 4 is wound around the outer periphery of the hollow portion, and a yoke 2 in which one is attached to one end of the core 3 and the other extends toward the other end of the core 3. And an armature 7 that is attached to the yoke 2 so as to face the other end of the core 3 and to be rotatable in a suction / separation direction with respect to the core 3, and the other end of the core 3 and the armature 7 disposed between the armature 7 to the core 3. Permanent magnet 8 for holding the state and fixed contact 9
It is composed of a fixed contact plate 9 having a and a movable contact plate 10 having a movable contact 10a and connected to the armature 7. Bobbin 5
Is made of a thermoplastic synthetic resin member such as nylon.

The base 11 comprises a flat plate portion 11a and a projecting bobbin supporting portion 11b provided on the flat plate portion 11a. The flat plate portion 11a and the bobbin supporting portion 11b are made of a synthetic resin member and integrally molded. Since it is integrally molded, the bobbin supporting portion 1 for the flat plate portion 11a is formed.
It is not necessary to consider the positioning of 1b. And
The mechanical unit 1 uses the bobbin 5 with an adhesive or the like to form the bobbin supporting unit 1.
It is supported by the base 11 by being attached to 1b. At this time, since the bobbin supporting portion 11b projects from the flat plate portion 11a and the gap portion 13 is provided between the base 11 and the yoke 2, the base 11 and the yoke 2 having a low vibration damping rate are not in contact with each other. It becomes a state.

In the electromagnetic relay configured as described above, the entire coil 4 vibrates due to the impact when the contact opening / closing operation, that is, when the armature 7 is attracted to or separated from the core 3. This vibration is transmitted to the yoke 2, but due to the gap 13 between the yoke 2 and the base 11, the vibration of the yoke 3 is not directly transmitted to the base 11, but is transmitted from the yoke 2 via the bobbin 5 to the base. It will be transmitted to the table 11. As a result, the vibration propagation distance from the yoke 2 to the case 12 becomes longer than in the conventional case.

As a result, the damping rate of the vibration transmitted to the case 12 can be increased, and the noise during the contact opening / closing operation can be reduced. Further, by forming the bobbin 5 from a synthetic resin member having a higher vibration damping rate than the metal forming the yoke 2, the vibration of the yoke 2 is significantly damped by the bobbin 5 and then passed through the base 11 to the case. Therefore, the noise can be reduced more effectively.

FIG. 2 is a schematic view showing the structure of an electromagnetic relay according to the second embodiment of the present invention. 2 (a) is a cross-sectional view as seen from the side, and FIG. 2 (b) is a schematic diagram for explaining a portion A in FIG. 2 (a). In FIG. 2, 5a is a recess,
Reference numeral 11c denotes a bobbin supporting portion, 11d denotes a convex portion, and portions having the same reference numerals as those in FIG. 1 indicate similar portions.

The difference between the second embodiment and the first embodiment is the mounting structure of the mechanism portion 1 to the base 11 shown by A portion. As shown in FIG. 2 (b), the bobbin 5 constituting the mechanism portion 1 is provided with a concave portion 5a at the bottom thereof, and the bobbin supporting portion 11c constituting the base 11 is provided with a convex portion 11d.
Is provided.

The mechanical portion 1 is formed by fitting the concave portion 5a of the bobbin 5 into the convex portion 11d of the bobbin supporting portion 11c and attaching it to the base 11 with an adhesive or the like. Bobbin 5 like this
By providing the concave portion 5a on the bobbin supporting portion 11c and the convex portion 11d on the bobbin supporting portion 11c, the bobbin supporting portion 1 can be assembled during assembly.
Positioning of the bobbin 5 with respect to 1c is facilitated, whereby the mechanism portion 1 can be stably positioned and supported on the base 11.

As described above, according to the first and second embodiments, since the space 13 is provided between the yoke 2 and the base 11 and the bobbin 5 is attached to the base 11, the yoke is opened / closed during the contact opening / closing operation. The vibration generated in 2 is not directly transmitted to the base 11, but is transmitted from the yoke 2 to the base 11 via the bobbin 5. As a result, the vibration propagation distance from the yoke 2 to the case 12 becomes longer than in the conventional case.

As a result, the damping rate of the vibration transmitted to the case 12 can be increased and the noise can be reduced.
Further, by forming the bobbin 5 from a synthetic resin member having a higher vibration damping rate than the metal forming the yoke 2, the vibration of the yoke 2 is significantly damped by the bobbin 5 and then the base 11
Thus, the noise can be more effectively reduced.

Further, according to the second embodiment, the bobbin 5 is attached to the base 11 by fitting the concave portion 5a provided on the bobbin 5 into the convex portion 11d provided on the bobbin supporting portion 11c. Allows the bobbin supporting portion 11c to be assembled at the time of assembly.
The bobbin 5 can be easily positioned with respect to the base 11, so that the mechanism portion 1 can be stably positioned and supported on the base 11.

[0023]

According to the electromagnetic relay of the present invention, since the bobbin is attached to the base by providing the gap between the yoke and the base, the vibration generated in the yoke during the contact opening / closing operation is directly caused by the base. It will not be transmitted to the base, but will be transmitted from the yoke to the base via the bobbin. Therefore, the vibration propagation distance from the yoke to the case becomes longer than in the conventional case, and the damping rate of the vibration transmitted from the yoke to the case becomes higher.

As a result, it is possible to obtain an electromagnetic relay in which the noise generated by the contact opening / closing operation is reduced.

[Brief description of drawings]

FIG. 1 is a schematic view showing the configuration of an electromagnetic relay of a first embodiment of the present invention, (a) is a sectional view seen from the front, (b) is a sectional view seen from the side, and (c) is a rear view. FIG.

FIG. 2 is a schematic diagram showing the configuration of an electromagnetic relay according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing the configuration of a conventional electromagnetic relay, (a)
Is a sectional view from the front, (b) is a sectional view from the side,
(c) is a cross-sectional view seen from the back.

FIG. 4 is a schematic diagram showing a configuration of a conventional electromagnetic relay.

[Explanation of symbols]

 1 Mechanism 2 Yoke 3 Core 4 Coil 5 Bobbin 11 Base 12 Case 13 Void

Claims (1)

[Claims] 1. A mechanism portion having a bobbin in which a core is inserted in a hollow portion and a coil is wound around the outer periphery of the hollow portion, and a yoke having one attached to one end of the core and the other extending toward the other end of the core. And a base supporting the mechanism section, and a case mounted on the base and accommodating the mechanism section, wherein a gap is provided between the yoke and the base to provide the base. An electromagnetic relay in which the bobbin is attached to the.