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Imaging device and surveillance camera having the imaging device

A camera device and camera optical system technology, applied to cameras, camera bodies, TVs, etc., can solve the problem of actuators applying loads, etc.

Active Publication Date: 2019-06-25
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, friction loss occurs due to unnecessary force, while applying a load to the actuator

Method used

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  • Imaging device and surveillance camera having the imaging device
  • Imaging device and surveillance camera having the imaging device
  • Imaging device and surveillance camera having the imaging device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0022] figure 1 is an exploded perspective view schematically showing a configuration example of the imaging device 1 according to the first embodiment. figure 2 is an external perspective view schematically showing a configuration example of the imaging device 1 according to the first embodiment. image 3 is a sectional view schematically showing a configuration example of the imaging device 1 according to the first embodiment. Such as Figure 1 to Figure 3 As shown, the imaging device 1 according to the embodiment of the present invention has an imaging optical system. Furthermore, the imaging device 1 has a fixed barrel 101 and a rear barrel 102 which function as a housing. A fixed barrel 101 arranged on the front side (the side facing the object) of the image pickup device 1 and a rear barrel 102 arranged on the rear side (the side opposite to the side facing the object) are fixed to each other by screws or the like.

[0023] The imaging optical system of the imaging ...

no. 2 example

[0085] Next, an imaging device 1 according to a second embodiment of the present invention will be described. In the imaging device 1 according to the second embodiment, the configurations of the second group lens barrel 20a, the second group rack member 24b, and the rack spring 27b are different from those of the first embodiment, and the same applies to other parts. structure. Therefore, portions to which the configuration common to the first embodiment can be applied are denoted by the same reference numerals as in the first embodiment, and descriptions thereof may be omitted.

[0086] Figure 10 is a perspective view schematically showing a configuration example of the second-group lens barrel 20 b and the second-group rack member 24 b of the imaging device 1 according to the second embodiment of the present invention. Figure 11A to Figure 11F is a diagram schematically showing a configuration example of a second group lens barrel 20 b (optical member holding member) an...

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Abstract

The invention provides an imaging device and a surveillance camera having the imaging device. The imaging device according one embodiment of the present invention has: a second group lens barrel having a second group lens and movable in an optical axis (A) direction of an imaging optical system; a first actuator engaged with the second group lens barrel via an actuator coupling portion to move thesecond group lens barrel in the optical axis (A) direction; a cam cylinder rotatable about an rotation axis (B) parallel to the optical axis (A); a first cam follower provided to the second group lens barrel and engaged with a second group cam groove of a cam cylinder; a second cam follower coupled so as to be relatively movable via a second group rack member and engaged with the second group camgroove; and a rack spring that actuates the second cam follower to the cam cylinder and actuates the actuator coupling portion toward the first actuator.

Description

technical field [0001] The present invention relates to an imaging device and a surveillance camera having the imaging device. Background technique [0002] Some image pickup apparatuses are configured to perform zooming by linearly moving the lens holding frame in the optical axis direction by a linear actuator to rotate a cam barrel by using a cam follower attached to the lens holding frame, and by moving the lens holding frame linearly in the optical axis direction via the cam barrel. The other lens holding frame is moved linearly in the direction of the optical axis. In an imaging device having such a configuration, it is necessary to reduce the backlash of the cam follower with respect to the cam barrel, and to reduce the backlash of the lens holding frame with respect to the linear actuator. [0003] Japanese Patent No. 5677039 discloses a construction in which a cam follower is pressed against one face of a cam groove by an actuating member, and the cam follower atta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/10
CPCG02B7/102G03B17/02G03B2217/002G08B13/19626H04N23/55G02B7/04
Inventor 大仲智也
Owner CANON KK
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