# US 9,521,710 B2 · Door opening structure for microwave oven

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,521,710 B2
- Document ID: US9521710B2
- Status: Granted
- Kind: B2
- Application number: 14/117,243
- Filed: 2012-01-30
- Published: 2014-11-13
- Granted: 2016-12-13
- Earliest claimed: 2011-05-12
- Assignees: Guangdong Galanz Microwave Oven and Electrical Appliances Manufacturing Co., Ltd.
- Applicants: Zhigang Li; Zhihua Chen; Jie Li; Cheng Jiang
- Inventors: Zhigang Li; Zhihua Chen; Jie Li; Cheng Jiang
- Web page: https://patentgrep.com/patent/US9521710B2

## CPC

- H05B 6/6414: {Aspects relating to the door of the microwave heating apparatus}
- E05F 5/00: Braking devices, e.g. checks; Stops; Buffers (construction of pneumatic or liquid braking devices E05F3/00; braking devices, buffers or end stops on drawers for tables, cabinets or like furniture A47B88/473; combined with devices for holding wings open E05C17/00; devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing E05C17/04)
- F24C 15/023: {Mounting of doors, e.g. hinges, counterbalancing}
- A47J 36/12: Devices for holding lids in open position on the container
- E05F 1/1215: {with a canted-coil torsion spring}
- E05Y 2201/20: Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y 2201/21: Brakes
- E05Y 2201/256: with pistons or vanes
- E05Y 2201/264: linear
- E05Y 2900/308: for ovens
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A door opening structure for microwave oven includes an upper hinge fastened on a door body assembly, and a lower hinge fastened on a oven body of a microwave oven, wherein the door body assembly is hinged with the oven body by the upper hinge and the lower hinge. An elastic element is provided between the upper hinge and the lower hinge, and the upper hinge is connected with a damper. Both ends of the upper hinge are provided with first connectors that are hinged with the lower hinge, and the middle portion of the upper hinge is provided with second connectors that are hinged with one end of the damper by spring pins.

## Claims

### Claim 1

A door opening structure for a microwave oven, comprising:
an upper hinge fastened on a door body assembly,
a lower hinge fastened on an oven body of a microwave oven,
wherein the door body assembly is hinged with the oven body by the upper hinge and the lower hinge,
an elastic element is provided between the upper hinge and the lower hinge,
the upper hinge is connected with a damper,
both ends of the upper hinge are provided with first connectors that are hinged with the lower hinge, and
the middle portion of the upper hinge is provided with second connectors that are hinged with one end of the damper by spring pins.

### Claim 2 (depends on 1)

The door opening structure of claim 1, wherein the other end of the damper is hinged with a connection member fastened on the microwave oven.

### Claim 3 (depends on 2)

The door opening structure of claim 2, wherein the damper is a hydraulic damper.

### Claim 4 (depends on 1)

The door opening structure of claim 1, wherein both ends of the lower hinge are provided with third connectors corresponding to the first connectors of the upper hinge, the middle portion of the lower hinge is provided with an escape opening corresponding to the damper, and both sides of the escape opening are provided with fourth connectors.

### Claim 5 (depends on 4)

The door opening structure of claim 4, wherein the both ends of the upper hinge are respectively hinged with the both ends of the lower hinge by torsional spring pins sequentially passing through the third connectors, the first connectors and the fourth connectors.

### Claim 6 (depends on 5)

The door opening structure of claim 5, wherein the two torsional spring pins are respectively provided with torsional springs.

### Claim 7 (depends on 6)

The door opening structure of claim 6, wherein one end of each torsional spring is inserted into the first connector and fastened on a first connector, and the other end of the torsional spring is fixed on a catching groove of a fourth connector.

### Claim 8 (depends on 7)

The door opening structure of claim 7, wherein the upper hinge is provided with a limiting wall which limits an open angle of the upper hinge, and the lower hinge is provided with a limiting protrusion corresponding to the limiting wall, so that during the process of opening the door, the upper hinge rotates relative to the lower hinge, and when the upper hinge turns to a certain angle, the limiting protrusion of the lower hinge touches the limiting wall of the upper hinge, so as to prevent the door from continuing to turn, and therefore to limit the open angle.

### Claim 9 (depends on 1)

The door opening structure of claim 1, wherein the door body assembly is provided with a door hook.