# US 12,191,095 B2 · Electromagnetic relay device

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- Number: US 12,191,095 B2
- Document ID: US12191095B2
- Status: Granted
- Kind: B2
- Application number: 17/940,499
- Filed: 2022-09-08
- Published: 2023-01-05
- Granted: 2025-01-07
- Earliest claimed: 2020-03-11
- Assignees: Denso Corporation; Denso Electronics Corporation
- Applicants: Denso Corporation; Denso Electronics Corporation
- Inventors: Jun Komatsu; Hiroshi Nagura; Naoki Uejima
- Web page: https://patentgrep.com/patent/US12191095B2

## CPC

- H01H 50/12: Ventilating; Cooling; Heating (for operating electrothermal relays H01H61/013)
- H01H 50/18: Movable parts of magnetic circuits, e.g. armature
- H01H 50/36: Stationary parts of magnetic circuit, e.g. yoke
- H01H 50/64: Driving arrangements between movable part of magnetic circuit and contact (structurally associated with contact spring sets H01H50/58)
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

An electromagnetic relay device includes a mover, a plunger, and a solenoid unit that causes the plunger to reciprocate. The mover includes a movable contact movable to abut onto or separate from a stationary contact. The plunger causes the mover to reciprocate to accordingly cause the movable contact to abut onto or separate from the stationary contact. A heat-resistant member is interposed between the insulator and the mover. The plunger enables indirect abutment onto the mover through the insulator and the heat-resistant member. A heat-resistant temperature of the heat-resistant member is set to be higher than that of the insulator.

## Claims

### Claim 1

An electromagnetic relay device comprising:
a mover including a movable contact movable to abut onto and separate from a stationary contact;
a plunger configured to cause the mover to reciprocate to accordingly cause the movable contact to abut onto or separate from the stationary contact;
a solenoid unit configured to cause the plunger to reciprocate;
an insulator having a heat-resistant temperature and arranged between the mover and the plunger; and
a heat-resistant member having a heat-resistant temperature and interposed between the insulator and the mover, the plunger enabling indirect abutment onto the mover through the insulator and the heat-resistant member, the heat-resistant temperature of the heat-resistant member being set to be higher than the heat-resistant temperature of the insulator.

### Claim 2 (depends on 1)

The electromagnetic relay device according to claim 1, wherein:
each of the mover and the heat-resistant member has a thermal conductivity; and
the thermal conductivity of the heat-resistant member is lower than the thermal conductivity of the mover.

### Claim 3 (depends on 1)

The electromagnetic relay device according to claim 1, wherein:
the insulator is fixed to the plunger;
the heat-resistant member is fixed to the insulator, resulting in the heat-resistant member being fixed to the plunger through the insulator;
the heat-resistant member has a first abutment portion that enables abutment onto a second abutment portion of the mover; and
a surface of at least one of the first and second abutment portions has been embossed as an embossed surface.

### Claim 4 (depends on 1)

The electromagnetic relay device according to claim 1, wherein:
the heat-resistant member has a given degree of elasticity to accordingly serve as an elastic member.

### Claim 5

An electromagnetic relay device comprising:
a mover including a movable contact movable to abut onto and separate from a stationary contact;
a plunger configured to cause the mover to reciprocate to accordingly cause the movable contact to abut onto or separate from the stationary contact;
a solenoid unit configured to cause the plunger to reciprocate; and
a heat-resistant insulator interposed between the plunger and the mover, the plunger enabling indirect abutment onto the mover through the heat-resistant insulator, the heat-resistant insulator being made of at least one of glass and ceramic.