Hinge apparatus for cover of image forming apparatus

• US 20040218229A1
• Filed: 01/16/2004
• Published: 11/04/2004
• Est. Priority Date: 04/30/2003
• Status: Active Grant

• Current Assignee: HP Printing Korea Co., Ltd. (HP Inc.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chol, Dong-ha
• Granted Patent: US 7,406,747 B2
• Time in Patent Office: Days
• US Class Current: 358/474
• CPC Class Codes: B41J 29/13 Cases or covers
• CPC Class Codes: E05D 11/00 Additional features or accessories of hinges edge protecting devices E06B3/88
• CPC Class Codes: E05D 11/02 Lubricating arrangements
• CPC Class Codes: E05D 11/08 Friction devices between relatively-movable hinge parts E05D7/086 takes precedence
• CPC Class Codes: E05D 3/02 with one pin
• CPC Class Codes: E05D 7/00 Hinges or pivots of special construction used for special suspension arrangements E05D15/00; so as to be self-closing E05F1/06, E05F1/12; with means for raising wings before being turned E05F7/02
• CPC Class Codes: E05F 1/1261 for counterbalancing
• CPC Class Codes: 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
• CPC Class Codes: E05Y 2201/638 Cams; Ramps
• CPC Class Codes: E05Y 2900/608 for machines
• CPC Class Codes: E06B 3/34 with only one kind of movement E06B3/48 takes precedence
• CPC Class Codes: G03G 15/605 Holders for originals or exposure platens for photographic purposes in general G03B
• CPC Class Codes: H04N 1/00519 Constructional details not otherwise provided for, e.g. housings, covers
• CPC Class Codes: H04N 1/00554 Latches or hinges therefor
• CPC Class Codes: H04N 1/00557 Connection or assembly of components or elements H04N1/00538 takes precedence
• CPC Class Codes: H04N 1/00559 Mounting or support of components or elements H04N1/00538 takes precedence
• CPC Class Codes: H04N 2201/0094 Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception

Abstract

A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.

Claims

1. A hinge apparatus to open and close a cover of an image forming apparatus, which pivotably connects the cover to a main body of the image forming apparatus, to expose and cover a document glass, the hinge apparatus comprising:

a hinge body movably inserted in a first direction into a coupling hole positioned in the main body of the image forming apparatus, and having supporting brackets;

a hinge cam, connected to the cover, and pivotably connected to the supporting brackets; and

a pressure device disposed at the hinge body to press the hinge cam.

2. The hinge apparatus of claim 1, wherein:

the hinge body is provided with a housing chamber; and

the pressure device comprises

a pusher disposed in the housing chamber, that protrudes from the housing chamber, and

a spring disposed within the housing chamber to press the pusher.

3. The hinge apparatus of claim 1, wherein the hinge cam comprises:

a body portion connected to the cover; and

a cam part that pivots in close contact with the pressure device.

4. The hinge apparatus of claim 3, wherein:

the cam part and each of the supporting brackets are provided with a shaft hole, respectively, and

the hinge apparatus further comprises a hinge shaft inserted through the respective shaft holes, to pivotably connect the cam part to the supporting brackets.

5. The hinge apparatus of claim 4, wherein:

a center of the hinge shaft is located toward the document glass compared to a pressure central line of the pressure device.

6. The hinge apparatus of claim 2, wherein:

the pusher comprises a locking protrusion;

the hinge body is provided with a guide slot; and

the locking protrusion is inserted into the guide slot, and prevents the release of the pusher from the hinge body.

7. The hinge apparatus of claim 1, wherein the hinge body comprises:

a first protrusion positioned at one side of the hinge body, to prevent the supporting brackets from entering the coupling hole.

8. The hinge apparatus of claim 1, wherein:

the main body comprises a hooking portion positioned at one side of the main body of an image forming apparatus; and

the hinge body comprises a second protrusion positioned at a first side of the hinge body, that is caught by the hooking portion, thereby preventing the release of the hinge body from the coupling hole when the hinge body is moved in a direction opposite the first direction.

9. The hinge apparatus of claim 2, wherein:

the pusher is made of a lubricating resin.

10. The hinge apparatus of claim 1, wherein:

the hinge cam is made of a lubricating resin.

11. A hinge apparatus rotatably connecting a cover and a main body, the hinge apparatus comprising:

a hinge body, with a void therein and a supporting bracket, movable in an opening in the main body;

a pressure device, movable within the void, and biased toward a first end of the hinge body; and

a hinge cam, connected to the cover, rotatably connected to the supporting bracket, and slidably engaging the pressure device.

12. The hinge apparatus according to claim 11, wherein:

the hinge cam and the supporting bracket each have a shaft hole; and

the hinge apparatus further comprises a hinge shaft inserted through the shaft holes of the hinge cam and the supporting bracket, to rotatably connect the hinge cam and the supporting bracket.

13. The hinge apparatus according to claim 12, wherein:

the hinge shaft is provided with at least one groove portion; and

the hinge apparatus further comprises at least one coupling ring, fixed to the at least one groove portion, to maintain a position of the hinge shaft with respect to the shaft holes of the hinge cam and the supporting bracket.

14. The hinge apparatus according to claim 11, wherein:

a protrusion is provided on one of the hinge cam and the supporting bracket; and

a receiving part receiving the protrusion is provided on the remaining one of the hinge cam and the supporting bracket, to rotatably connect the hinge cam and the supporting bracket.

15. The hinge apparatus according to claim 11, wherein:

the hinge body comprises a first protrusion, to limit an amount the hinge body moves into the opening in the main body.

16. The hinge apparatus according to claim 15, wherein:

the opening in the main body is provided with a hooking portion; and

the hinge body comprises a second protrusion, to limit an amount the hinge body moves out of the opening in the main body.

17. The hinge apparatus according to claim 11, wherein:

the pressure device comprises a pusher and a biasing element that biases the pusher toward the first end of the hinge body; and

the hinge body comprises a biasing element support,

wherein a first end of the biasing element engages a first end of the pusher, and a second end of the biasing element engages the biasing element support.

18. The hinge apparatus according to claim 17, wherein

the pusher comprises a locking protrusion;

and

the hinge body comprises a wall with a guide slot,

wherein the locking protrusion is inserted into the guide slot, to guide and limit movement of the pusher within the void of the hinge body.

19. The hinge apparatus according to claim 18, wherein:

a location of the guide slot is defined to prevent the pusher from being released from the hinge body.

20. The hinge apparatus according to claim 18, wherein:

the biasing element comprises a spring; and

a length of the spring is defined as approximately a distance between the first end of the pusher and the spring support, when the locking protrusion of the pusher contacts a side of the slot nearest the first end of the hinge body.

21. The hinge apparatus according to claim 17, wherein:

at least one of the pusher and the hinge cam are made of a lubricating resin.

22. The hinge apparatus according to claim 11, wherein the hinge cam comprises:

a body portion connected to the cover; and

a cam part slidably engaging the pressure device.

23. The hinge apparatus according to claim 22, wherein:

the body portion and the cam part are integrally formed.

24. The hinge apparatus according to claim 12, wherein:

a center of rotation of the hinge shaft is offset by a predetermined distance from a line along which a center of the pressure device moves, to inhibit rotation of the hinge cam.

25. An apparatus having a cover and a main body connected by the hinge apparatus of claim 11.

26. A hinge apparatus, rotatably connecting a cover and a main body, the hinge apparatus comprising:

a hinge body with a supporting bracket, moveably inserted into a cavity in the main body;

a hinge cam connected to the cover and pivotably connected to the supporting bracket; and

a pressure device, disposed at the hinge body to press the hinge cam and inhibit rotation of the hinge cam.