CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a National Stage of International Application No. PCT/JP2018/042778 filed Nov. 20, 2018, claiming priority to Japanese Patent Application No. 2017-238044 filed Dec. 12, 2017, and the contents of each noted application is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present disclosure generally relates to contact devices and electromagnetic relays, and specifically, to a contact device and an electromagnetic relay including a fixed contact and a movable contact.

BACKGROUND ART

Patent Literature 1 describes an electromagnetic relay for opening and closing contacts by an electromagnet. The electromagnetic relay described in Patent Literature 1 is provided with the contact unit includes a fixed contact and a movable contact which is fixed to a movable spring serving as an electrically conductive flat spring. The fixed contact is connected to a fixed contact terminal and is located on an iron core side of the movable contact to face the movable contact.

The electromagnetic relay described in Patent Literature 1 has such a configuration that the fixed contact terminal has one end connected to the fixed contact and the other end exposed to an outer side of a housing, and the fixed contact terminal is in contact with outside air. Therefore, when the electromagnetic relay is used in a low-temperature environment, the fixed contact terminal in contact with the outside air rapidly cools the fixed contact, and thereby, air in the vicinity of the fixed contact forms condensation and freezes on the fixed contact, which may lead to a defect of electrical connection between the contacts.

CITATION LIST

Patent Literature

Patent Literature 1: JP 2010-108656 A

SUMMARY OF INVENTION

In view of the foregoing, it is an object of the present disclosure to provide a contact device and an electromagnetic relay configured to reduce defects of electrical connection between contacts caused by freezing.

A contact device according to one aspect of the present disclosure includes a fixed terminal, a movable member, a regulating member, and a heat transmission structure. The fixed terminal includes a fixed contact. The movable member includes a movable contact and is configured to move between a closed position where the movable contact is in contact with the fixed contact and an open position where the movable contact is apart from the fixed contact. The regulating member is configured to be in contact with the movable contact when the movable member is in the open position. The heat transmission structure is configured to transmit, to the fixed terminal, heat from the movable contact when the movable member is in the open position, through a thermal path including at least the regulating member.

An electromagnetic relay according to one aspect of the present disclosure includes the contact device and an electromagnet having a coil.

