Gear structure spring hinge

• US 10,501,976 B2
• Filed: 05/13/2016
• Issued: 12/10/2019
• Est. Priority Date: 05/13/2016
• Status: Active Grant

• Current Assignee: UNID Co., Ltd.
• Original Assignee: UNID Co., Ltd.
• Inventors: Hu, Nengjun, Cheng, Meiyuan
• Primary Examiner(s): Mah, Chuck Y
• Application Number:
  US16/097,789
• Publication Number:
  US 20190169902A1
• Time in Patent Office: 1,306 Days
• CPC Class Codes: E05D 11/06 Devices for limiting the opening movement of hinges
• CPC Class Codes: E05D 3/02 with one pin
• CPC Class Codes: E05D 3/122 Gear hinges
• CPC Class Codes: E05F 1/1058 for counterbalancing
• CPC Class Codes: E05F 1/1253 with a compression spring
• CPC Class Codes: E05F 1/1261 for counterbalancing
• CPC Class Codes: E05F 1/14 with double-acting springs, e.g. for closing and opening or checking and closing no material
• CPC Class Codes: E05F 3/20 in hinges
• CPC Class Codes: E05Y 2201/224 Stops
• CPC Class Codes: E05Y 2201/638 Cams; Ramps
• CPC Class Codes: E05Y 2201/71 Toothed gearing
• CPC Class Codes: E05Y 2201/712 with incomplete toothing
• CPC Class Codes: E05Y 2600/626 Plates or brackets
• CPC Class Codes: E05Y 2900/30 for domestic appliances
• CPC Class Codes: E05Y 2900/308 for ovens

Abstract

The present invention relates to the technical field of spring hinges, and to a gear structure spring hinge, which addresses the technical shortcoming that a closing speed is excessively high when an existing spring hinge used in a household appliance drives a cabinet door to close. The gear structure spring hinge comprises a fixing base and a hinge arm, the fixing base being connected to a first gear through a first gear shaft, a crank shaft being provided on a gear surface of the first gear, the crank shaft being movably connected to a pull rod, a spring assembly being sleeved on the pull rod, a front end of the spring assembly being mated with and snap-fitted to the fixing base; and the hinge arm includes a connecting arm and a second gear, the second gear being provided on an end of the connecting arm, the second gear and the connecting arm forming an integral structure, the second gear being connected to the fixing base through a second gear shaft, the second gear being meshed with the first gear. Compared to the existing spring hinge, by means of the present invention, the closing speed of the cabinet door is effectively reduced, and an effect of damping is achieved, such that the cabinet door is closed in a more stable manner, and a force of the spring assembly is not affected after the spring assembly drives the cabinet door to close. The present invention is particularly suitable for use on such products as ovens and microwave ovens.

Claims

1. A gear structure spring hinge, wherein the hinge comprises a fixing base and a hinge arm, the fixing base being pivotally connected to a first gear through a first gear shaft, a crank shaft being provided on a gear surface of the first gear, the crank shaft being rotatably connected to a pull rod, a spring assembly being sleeved on the pull rod, a front end of the spring assembly being mated with and snap-fitted to the fixing base;

and the hinge arm includes a connecting arm and a second gear, the second gear being provided on an end of the connecting arm, the second gear and the connecting arm forming an integral structure, the second gear being pivotally connected to the fixing base through a second gear shaft, the second gear being meshed with the first gear.

2. The gear structure spring hinge of claim 1, wherein the hinge arm further comprises a mounting member with a mounting hole;

an anti-detaching positioning groove is provided on a side edge of the connecting arm, two corners of a rear end of the connecting arm being chamfered; and

a connecting arm groove for mating and snap-fitting with the connecting arm is provided on the mounting member, an elastic jaw for mating and snap-fitting with the anti-detaching positioning groove being provided on a groove wall of the connecting arm groove.

3. The gear structure spring hinge of claim 2, wherein a first leaf spring structure mated and elastically clamped with the side edge of the connecting arm is provided on a side wall of the connecting arm groove, and a second leaf spring structure mated and elastically clamped with a side of the connecting arm is provided on a bottom wall of the connecting arm groove.

4. The gear structure spring hinge of claim 1, wherein the spring assembly comprises a bottom stopping piece, a spring and a lock nut that are sleeved on the pull rod in sequence, two raised lugs being provided on two opposite sides of the bottom stopping piece respectively, and lug grooves mated with the two lugs being provided on the fixing base.

5. The gear structure spring hinge of claim 1, wherein a stopping and limiting portion mated with the fixing base for position limiting is provided on the connecting arm.