Safety shredder

• US 8,079,537 B2
• Filed: 06/04/2010
• Issued: 12/20/2011
• Est. Priority Date: 06/27/2007
• Status: Active Grant

• Current Assignee: Aurora Office Equipment Limited
• Original Assignee: Aurora Office Equipment Limited
• Inventors: Chen, Liangneng
• Primary Examiner(s): Francis, Faye
• Application Number:
  US12/794,720
• Publication Number:
  US 20100243775A1
• Time in Patent Office: 564 Days
• Field of Search: 241/37.5, 241/100, 241/236
• US Class Current: 241/37.5
• CPC Class Codes: B02C 18/0007 specially adapted for disintegrating documents
• CPC Class Codes: B02C 2018/168 User safety devices or measures in shredders

Abstract

Active protection system for a paper shredder, which includes an upper cover and a shedder plate on the upper cover. The paper shredder plate includes a touch structure, which engagingly interacts with a preferential power supply switch. When closed, the shredder plate prevents contact with the shredding blade. When opened, the shredder plate both initiates shredder normal operation, and prevents feeding of unexpected items into the shredder making accidental contact with the shredding blade. When an unexpected item contacts the safety structure, beneath the paper shredder plate, the protection system switches off the shredder power supply.

Claims

1. A paper feed opening protection system for a paper shredder, comprising:

a paper shredder upper cover having an elongate paper feed opening therethrough;

a paper shredder plate having tiltingly extremum positions disposed to be positioned relative to the paper feed opening; and

a preferential power supply switch configured to preferentially control a shredder power supply in response to a position of the paper shredder plate being a tilting extremum position.

2. The protection system of claim 1, wherein the paper shredder plate is selectively positioned to close the feed opening, and wherein the paper shredder plate engagingly interacts with the preferential power supply switch to disconnect the shredder power supply.

3. The protection system according to claim 1, wherein the paper shredder plate is selectively positioned in a pushed up position relative to the elongate paper feed opening and wherein the paper shredder plate engagingly interacts with the preferential power supply switch to disconnect the shredder power supply.

4. The protection system according to claim 1, wherein the paper shredder plate and the preferential power supply switch further comprise an integrated power disconnection system.

5. The protection system according to claim 1, wherein the paper shredder upper cover and the paper shredder plate are separately formed.

6. The protection system according to claim 5, further comprising:

a main base body connected to the paper shredder upper cover, and having a protrusion point extending from the main base body; and

a protruding block fixed to the paper shredder plate and coupled to the main base body;

wherein the protruding block further includes a closing detent point and a working detent point, wherein the protrusion point is configured to engage with the closing detent point or the working detent point, as the paper shredder plate is deflected.

7. The protection system according to claim 6, wherein the paper feed plate and the preferential power supply further comprise an integrated system.

8. The protection system according to claim 1, further comprising:

a cam coupled to the paper shredder plate,

wherein the preferential power supply switch includes a touch point to engage the cam when the paper shredder plate is positioned relative to the elongate paper feed opening;

a main base body having a protrusion point extending therefrom; and

a protruding block disposed to couple with the main base body,

wherein the protruding block further includes a closing detent point and a working detent point, wherein the protrusion point is configured to engage with one of the closing detent point or the working detent point, as the paper shredder plate is selectively positioned.

9. The protection system, according to claim 8, wherein the paper shredder plate is selectively positioned to uncover the elongate paper feed opening and engages to switch ON the shredder power supply.

10. The protection system, according to claim 9, wherein the paper shredder plate further comprises a first transverse side configured at its inner surface with a paper stopper that extends downwards and inwards relative to the elongate paper feed opening, and a second transverse side formed with an indented pressing area in the middle section of said outer surface.

11. The protection system, according to claim 8, wherein the paper shredder plate is selectively positioned to cover the elongate paper feed opening, and engages to switch OFF the shredder power supply.

12. The protection system, according to claim 8, wherein the paper shredder plate is positioned to uncover the elongate paper feed opening and is selectively positioned in a pushed up position relative to the elongate paper feed opening, and engages to preferentially switch OFF the shredder power supply.

13. The protection system according to claim 8, further comprising:

a cam coupled to the paper shredder plate,

wherein the preferential power supply switch is positioned to engage with the cam when the paper shredder plate is positioned to cover the elongate paper feed opening.

14. The protection system, according to claim 1, wherein the paper shredder plate is configured to be disposed in one of:

an first OFF position, wherein the paper shredder plate is selectively positioned to cover the elongate paper feed opening and to disconnect the shredder power supply;

an ON position, wherein the paper shredder plate is selectively positioned to uncover the elongate paper feed opening and to connect the shredder power supply; and

a second OFF position, wherein the paper shredder plate is selectively positioned to uncover the elongate paper feed opening and further is disposed in a pushed up position relative to the elongate paper feed opening and wherein the paper shredder plate engagingly interacts with the preferential power supply switch to disconnect the shredder power supply.

15. The protection system, according to claim 1, wherein the paper shredder plate is selectively positioned to uncover the elongate paper feed opening, and to switch ON the shredder power supply.

16. The protection system, according to claim 1, wherein the paper shredder plate is selectively positioned to cover the elongate paper feed opening and to switch OFF the shredder power supply.

17. The protection system, according to claim 1, wherein the paper shredder plate is selectively positioned in a pushed up position relative to the elongate paper feed opening and to preferentially switch OFF the shredder power supply.

18. A paper feed opening protection system for a paper shredder, comprising:

a paper shredder upper cover having an elongate paper feed opening therethrough;

a paper shredder plate disposed to be positioned relative to the paper feed opening;

a preferential power supply switch configured to preferentially control a shredder power supply in response to a position of the paper shredder plate;

a cam coupled to the paper shredder plate, wherein the preferential power supply switch includes a touch point to engage the cam when the paper shredder plate is positioned relative to the elongate paper feed opening; and

a main base body having a protrusion point extending therefrom; and

a protruding block disposed to couple with the main base body,

wherein the protruding block further includes a closing detent point and a working detent point, wherein the protrusion point is configured to engage with one of the closing detent point or the working detent point, as the paper shredder plate is selectively positioned.

19. The protection system according to claim 18, further comprising:

a main base body connected to the paper shredder upper cover, and having a protrusion point extending from the main base body; and

a protruding block fixed to the paper shredder plate and coupled to the main base body;

wherein the protruding block further includes a closing detent point and a working detent point, wherein the protrusion point is configured to engage with the closing detent point or the working detent point, as the paper shredder plate is deflected.

20. The protection system according to claim 19, wherein the paper feed plate and the preferential power supply further comprise an integrated system.

21. The protection system, according to claim 18, wherein the paper shredder plate is selectively positioned to uncover the elongate paper feed opening and engages to switch ON the shredder power supply.

22. The protection system, according to claim 21, wherein the paper shredder plate further comprises a first transverse side configured at its inner surface with a paper stopper that extends downwards and inwards relative to the elongate paper feed opening, and a second transverse side formed with an indented pressing area in the middle section of said outer surface.

23. The protection system, according to claim 18, wherein the paper shredder plate is selectively positioned to cover the elongate paper feed opening, and engages to switch OFF the shredder power supply.

24. The protection system, according to claim 18, wherein the paper shredder plate is positioned to uncover the elongate paper feed opening and is selectively positioned in a pushed up position relative to the elongate paper feed opening, and engages to preferentially switch OFF the shredder power supply.

25. The protection system according to claim 18, further comprising:

a cam coupled to the paper shredder plate,

wherein the preferential power supply switch is positioned to engage with the cam when the paper shredder plate is positioned to cover the elongate paper feed opening.