JPH0515286U - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] [Structure] The electromagnetic relay body is directly covered with an inner cover 2 and an inner base 3 made of polypropylene. Moreover, the entire outer periphery of the cover 2 and the base 3 is covered with an outer cover 5 and an outer base 6 made of polybutylene terephthalate with a gap. [Effect] Since the cover and the base that cover the relay body 1 have a double structure, the operating noise when the relay is driven can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay having an improved structure such as a cover for covering a relay body.

[0002]

[Prior Art]

 Such an electromagnetic relay in the related art is constructed by covering a relay main body, which includes a coil, an armature and a yoke, with a cover and a base. Moreover, the cover and base are made of polypropylene, polybutylene terephthalate, or the like.

[0003]

[Problems to be solved by the device]

 Since the above-mentioned conventional electromagnetic relay covers the relay main body with a pair of covers and a base, it has a drawback in that the sound and transmitted sound caused by the vibration during driving cannot be reduced and the operation sound is large.

An object of the present invention is to provide an electromagnetic relay capable of reducing operating noise when driving such a relay.

[0005]

[Means for Solving the Problems]

 The electromagnetic relay of the present invention includes a relay body, an inner cover and an inner base made of polypropylene for directly covering the relay body, and a poly-metal resin having a gap provided around the outer circumference of the inner cover and the inner base. It has an outer cover and an outer base made of butylene terephthalate.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an electromagnetic relay showing an embodiment of the present invention. As shown in FIG. 1, in this embodiment, an electromagnetic relay body 1 including a coil 7, a yoke 8 and a movable spring 9 is directly covered with an inner cover 2 and an inner base 3 made of polypropylene. However, the inner cover 2 and the inner base 3 are covered with the outer cover 5 and the outer base 6 made of poly (ethylene terephthalate) with a gap provided all around the outer circumference. The outer lead-out terminal 4 is suspended in the middle. As described above, by covering the relay body 1 with the cover or base having a double structure, the vibration during the driving of the relay is attenuated by the soft inner cover 2 made of polypropylene, so that the transmitted sound becomes difficult to be transmitted. Further, since the outer cover 5 and the outer base 6 are made of hard polybutylene terephthalate, they are also excellent in environmental resistance and chemical resistance. Furthermore, since the external lead-out terminal 4 is suspended, the vibration of the terminal is also damped.

In addition to the above-described embodiment, the electromagnetic relay body 1 is covered with an inner cover 2 and an inner base 3 made of polypropylene, and an outer cover 5 and an outer base 6 made of high specific gravity resin are provided on the entire outer circumference thereof. You may comprise. Also in this case, the vibration when the relay is driven is attenuated by the inner cover 2 made of soft polypropylene so that the transmitted sound is hardly transmitted by the outer cover 5 and the outer base 6. That is, by using the high specific gravity resin, the transmitted sound and the vibration sound can be reduced. The high specific gravity resin may be used for any of the inner cover 2 and the inner base 3 and the outer cover 5 and the outer base 6.

[0009]

[Effect of the device]

 As described above, in the electromagnetic relay of the present invention, the cover and base covering the relay body have a double structure and polypropylene or polybutylene terephthalate is used, so that the operation noise at the time of driving the relay can be reduced. is there.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an electromagnetic relay showing an embodiment of the present invention.

[Explanation of symbols]

 1 relay body 2 inner cover 3 inner base 4 external lead-out terminal 5 outer cover 6 outer base 7 coil 8 yoke 9 movable spring

Claims (2)

[Scope of utility model registration request] 1. A relay main body, an inner cover and an inner base made of polypropylene for directly covering the relay main body, and polybutylene terephthalate arranged with a gap provided around the entire outer periphery of the inner cover and the inner base. An electromagnetic relay having an outer cover and an outer base. 2. The electromagnetic relay according to claim 1, wherein at least one of the inner cover and the inner base and the outer cover and the outer base is made of a high specific gravity resin.