# US 11,910,546 B2 · Explosion-proof structure for electronic component

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- Number: US 11,910,546 B2
- Document ID: US11910546B2
- Status: Granted
- Kind: B2
- Application number: 17/285,758
- Filed: 2019-06-03
- Published: 2022-05-05
- Granted: 2024-02-20
- Earliest claimed: 2019-06-03
- Assignees: Toshiba Mitsubishi-Electric Industrial Systems Corporation
- Applicants: Toshiba Mitsubishi-Electric Industrial Systems Corporation
- Inventors: Mitsuru Hano
- Web page: https://patentgrep.com/patent/US11910546B2

## CPC

- H05K 7/1432: {specially adapted for power drive units or power converters}
- H02B 1/28: dustproof, splashproof, drip-proof, waterproof or flameproof
- H02B 1/565: {for cabinets}
- H02B 13/025: Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER

## Abstract

An explosion-proof structure having a housing that houses an electronic device, a cover member that covers a first ventilation port formed on one surface of the housing at least in a normal direction to the one surface, an opening/closing member that opens and closes a second ventilation port formed between the one surface and the cover member, and a rotation support portion provided at a peripheral portion of the first ventilation port and that supports the opening/closing member, the opening/closing member rotating around the rotation support portion, using the rotation support portion as a center of rotation.

## Claims

### Claim 1

An explosion-proof structure comprising:
a housing configured to house an electronic device;
a cover member configured to cover a first ventilation port formed on one surface of the housing at least in a normal direction to the one surface;
an opening/closing member configured to open and close a second ventilation port formed between the one surface and the cover member; and
a rotation support portion provided at a peripheral portion of the first ventilation port and configured to support the opening/closing member,
wherein the opening/closing member is configured to rotate around the rotation support portion, using the rotation support portion as a center of rotation.

### Claim 2 (depends on 1)

The explosion-proof structure according to claim 1, comprising a rotation restricting member configured to restrict rotation of the opening/closing member in a state where the second ventilation port is closed.

### Claim 3 (depends on 1)

The explosion-proof structure according to claim 1, comprising an entry restricting member configured to restrict entry into the housing by rotation of the opening/closing member in a state where the second ventilation port is opened.

### Claim 4 (depends on 1)

The explosion-proof structure according to claim 1, comprising, a plurality of opening/closing members, each of the plurality of opening/closing members being identical to the opening/closing member,
wherein the plurality of opening/closing members comprises:
a first opening/closing member connected to an upper portion in a vertical direction of the peripheral portion; and
at least one second opening/closing member connected to a portion other than the upper portion in the vertical direction of the peripheral portion, wherein, in a state where the second ventilation port is opened, at least a part of the second opening/closing member overlaps the first opening/closing member on one surface side of the first opening/closing member in the normal direction.

### Claim 5 (depends on 4)

The explosion-proof structure according to claim 4, wherein the plurality of opening/closing members comprises:
a third opening/closing member connected to a downward portion in the vertical direction of the peripheral portion, wherein, in a state where the second ventilation port is opened, at least a part of the third opening/closing member overlaps the second opening/closing member on one surface side of the second opening/closing member in the normal direction.

### Claim 6 (depends on 1)

The explosion-proof structure according to claim 1, wherein
the opening/closing member include a plastic deformation portion plastically deformed by a predetermined pressure inside the housing, and
the second ventilation port is closed by plastic deformation of the plastic deformation portion.

### Claim 7 (depends on 1)

The explosion-proof structure according to claim 1, wherein an opening area of the first ventilation port and an opening area of the second ventilation port are same and within a predetermined range.

### Claim 8 (depends on 7)

The explosion-proof structure according to claim 7, wherein an opening area in a vertically upper portion of the second ventilation port is smaller than at least an opening area in a vertically downward portion of the second ventilation port.

### Claim 9 (depends on 8)

An explosion-proof structure according to claim 8, comprising an upper cover member configured to cover at least a part of an opening in the vertically upper portion of the second ventilation port.