Surveillance camera gimbal mechanism

• US 7,534,057 B2
• Filed: 12/06/2005
• Issued: 05/19/2009
• Est. Priority Date: 12/06/2005
• Status: Expired due to Fees

• Current Assignee: Bosch Security Systems Incorporated (Robert Bosch GmbH), Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Arnold, Kathleen E, Jones, Theodore L
• Primary Examiner(s): Koval; Melissa J
• Assistant Examiner(s): Smith; Linda B
• Application Number:
  US11/295,013
• Publication Number:
  US 20070127912A1
• Time in Patent Office: 1,260 Days
• Field of Search: 396/428, 396/427, 396/422, 396/12, 348/373, 348/143, 348/211, 348/149, 348/144, 348145-147, 359/429, 248/586
• US Class Current: 396/427
• CPC Class Codes: F16M 11/10 around a horizontal axis F16M11/12 takes precedence
• CPC Class Codes: F16M 11/2014 around a vertical axis F16M11/2035 takes precedence
• CPC Class Codes: G02B 7/005 Motorised alignment
• CPC Class Codes: G08B 13/1963 Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]

Abstract

A surveillance camera gimbal mechanism. The mechanism utilizes a rotationally adjustable disk and support arrangement to afford smoothly adjustable, fastener-free, and stable diagonal adjustment that also provides axial compliance. The diagonal adjustment mechanism is integrated with a pan and tilt gimbal mechanism to allow smooth and stable single-point manual fixation of pan and tilt positions without creating depressions in the mating parts which make readjustment difficult.

Claims

1. A surveillance camera gimbal mechanism for providing control of a camera lens assembly having a lens optical axis, comprising:

a support structure;

a diagonal adjustment mechanism mounted in said support structure, said diagonal adjustment mechanism being secured in said support structure by a compressible structure and selectively rotatable relative to said support structure when a compressive force is applied to the compressible structure in a direction generally parallel to the lens optical axis; and

a tilt adjustment mechanism mounted in said support structure and including a single only tilt fastener.

2. The gimbal mechanism of claim 1, further comprising a pan adjustment mechanism associated with said support structure including a single only pan fastener.

3. The gimbal mechanism of claim 1, wherein said support structure comprises a central body portion including a groove having at least one recess, at least one protrusion extending radially inwardly, and at least one end body portion.

4. A gimbal mechanism of claim 1, wherein said diagonal adjustment mechanism comprises a ring attached to the camera lens assembly and disposed in a groove of the support structure, said ring including at least one protrusion extending therefrom parallel to the lens optical axis.

5. The gimbal mechanism of claim 4, wherein a center of said ring coincides with the lens optical axis.

6. The gimbal mechanism of claim 5, wherein said ring has a thickness measured in the direction of the lens optical axis which is less than a thickness of said groove.

7. The gimbal mechanism of claim 6, wherein the compressible structure is disposed adjacent said ring within said groove.

8. The gimbal mechanism of claim 1, wherein said tilt adjustment mechanism includes a tilt axis about which the camera lens assembly is tilted, said tilt fastener offset from said tilt axis.

9. The gimbal mechanism of claim 1, wherein said tilt adjustment mechanism includes a tilt disk, said tilt disk including an arcuately-shaped slot, said tilt fastener extending through said tilt disk via said slot.

10. The gimbal mechanism of claim 1, wherein said tilt fastener comprises two parts, wherein at least one part contacts said support structure, whereby contact with said support structure prevents said tilt fastener from contacting said tilt disk.

11. The gimbal mechanism of claim 10, wherein said support structure includes at least one throughbore, said at least one throughbore shaped to receive said one part of said tilt fastener.

12. The gimbal mechanism of claim 1, wherein said tilt fastener includes means for avoiding localized deformations formed in said tilt adjustment mechanism.

24. The gimbal mechanism of claim 4, further comprising at least one protrusion formed on a front surface of the ring, the at least one protrusion riding against a front surface of the groove as camera lens assembly and the ring are rotated relative to support structure, the at least one protrusion entering one of a plurality of recesses formed in a front surface of the groove due to pressure from the compressible structure to lock the camera lens assembly and the ring in a fixed position relative to the support structure.

25. The gimbal mechanism of claim 24, wherein application of the compressive force to the compressible structure in a direction parallel to the lens optical axis compresses the compressible structure and moves the at least one protrusion out of engagement with the recess to permit rotation of the ring and the camera lens assembly relative to the support structure.

26. The gimbal mechanism of claim 4, further comprising a radial protrusion formed on the ring, the radial protrusion being configured to engage a portion of the support structure to prevent complete 360°

rotation of the ring relative to the support structure.

28. The gimbal mechanism of claim 1, wherein the compressible structure applies a force to the diagonal adjustment mechanism in a direction generally parallel to the lens optical axis, thereby providing a friction, force to resist rotation of the diagonal adjustment mechanism.

13. A surveillance camera gimbal mechanism for providing control of a camera lens assembly having a lens optical axis, comprising:

a support structure;

a diagonal adjustment mechanism mounted in said support structure, said diagonal adjustment mechanism being secured in said support structure by a compressible structure and selectively rotatable relative to said support structure when a compressive force is applied to the compressible structure in a direction generally parallel to the lens optical axis.

14. The gimbal mechanism of claim 13, further comprising a tilt adjustment mechanism mounted in said support structure and including a single only tilt fastener.

15. The gimbal mechanism of claim 13, wherein said support structure comprises a central body portion including a groove having at least one recess, at least one protrusion extending radially inwardly, and at least one end body portion.

16. The gimbal mechanism of claim 13, wherein said diagonal adjustment mechanism comprises a ring attached to the camera lens assembly and disposed in a groove of the support structure, said ring including at least one protrusion extending therefrom parallel to the lens optical axis.

17. The gimbal mechanism of claim 16, wherein a center of said ring coincides with the lens optical axis.

18. The gimbal mechanism of claim 17, wherein said ring has a thickness measured in the direction of the lens optical axis which is less than a thickness of said groove.

19. The gimbal mechanism of claim 18, wherein the compressible structure is disposed adjacent said ring within said groove.

21. The gimbal mechanism of claim 13, wherein the compressible structure is a washer having a thickness which varies when compression force is applied in a direction parallel to the lens optical axis.

22. The gimbal mechanism of claim 21, wherein the washer includes a front surface configured to contact a back surface of the ring and a back surface configured to contact a back surface of the groove when the washer is located in the groove.

23. The gimbal mechanism of claim 21, wherein application of the compressive force compresses the washer and allows the ring to move axially toward the back surface of the groove and rotate relative to the support structure.

27. The gimbal mechanism of claim 13, further comprising a pan adjustment mechanism associated with said support structure including a single only pan fastener.

29. The gimbal mechanism of claim 13, wherein the compressible structure applies a force to the diagonal adjustment mechanism in a direction generally parallel to the lens optical axis, thereby providing a friction force to resist rotation of the diagonal adjustment mechanism.

20. A surveillance camera gimbal mechanism for providing control of a camera lens assembly having a lens optical axis, comprising:

a support structure;

a diagonal adjustment mechanism mounted in said support structure, said diagonal adjustment mechanism being secured in said support structure by a compressible structure and selectively rotatable relative to said support structure when a compressive force is applied to the compressible structure in a direction generally parallel to the lens optical axis;

a tilt adjustment mechanism mounted in said support structure and including a single only tilt fastener; and

a pan adjustment mechanism associated with said support structure including a single only pan fastener.

30. The gimbal mechanism of claim 20, wherein the compressible structure applies a force to the diagonal adjustment mechanism in a direction generally parallel to the lens optical axis, thereby providing a friction force to resist rotation of the diagonal adjustment mechanism.