Lens barrel and image pickup device

A lens and lens barrel technology, which is applied in the field of fixed optical components, can solve the problems of impact sound, impact transmission to hands, and obvious garbage.

Active Publication Date: 2020-08-04
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the linear motor is powered off, if the user shakes the imaging device, the focus lens group moves and collides with the end of the movable range of the focus lens group, and the impact may be transmitted to the hand or a shock sound may be generated.
In addition, when there is trash in the lens barrel, the trash moves due to the impact, and there is a problem that the trash becomes visible after the shipment inspection.

Method used

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  • Lens barrel and image pickup device
  • Lens barrel and image pickup device
  • Lens barrel and image pickup device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0081] figure 1 It is a sectional view of the main part showing the first embodiment of the lens barrel according to the present invention, figure 2 is along figure 1 Cutaway view of line 2-2 shown.

[0082] In this example, figure 1 and figure 2 The illustrated lens barrel 1 functions as a fixed focus interchangeable lens of an interchangeable lens camera having an auto focus (Auto Focus / AF) function.

[0083] The lens barrel 1 is mainly composed of a fixed frame 10 , a movable frame 22 that holds an optical component (focusing lens) 20 , a voice coil motor (VCM: Voice Coil Motor) 30 , which is a type of linear motor that drives the movable frame 22 , and limited Movement restriction portion 12 of movable frame 22 , engagement portion 24 provided in movable frame 22 , lock ring 40 functioning as a locking member for fixing (locking) movement of movable frame 22 , and movement of lock ring 40 A (rotating) electric actuator 50 is constituted.

[0084] The main shaft 13 ...

no. 2 Embodiment approach

[0135] Figure 5 It is a perspective view showing a second embodiment of the lens barrel according to the present invention. In addition, with figure 1 and figure 2 The parts common to the lens barrel 1 of the first embodiment shown are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.

[0136] Figure 5 The lens barrel 1 - 2 of the second embodiment shown is different from the first embodiment in that a locking member 40 - 2 is mainly used instead of the lock ring 40 and an abutment member 70 is added.

[0137] Like the lock ring 40 , the locking member 40 - 2 is rotatably supported with respect to the fixed frame 10 about the optical axis L of the focus lens 20 , but is not formed in a ring shape but in an arc shape.

[0138] Image 6 It is a perspective view of the electric actuator 50 applied to the lens barrel 1-2 of the second embodiment.

[0139] Image 6 The spur gear 57 of the gear train of the electric actuator 50 show...

no. 3 Embodiment approach

[0148] Figure 9 and Figure 10 are perspective views each showing a third embodiment of the lens barrel according to the present invention, Figure 9 shows about the unlocked state, Figure 10 The lock state is shown. In addition, the same code|symbol is attached|subjected to the part common to the lens barrel of 1st Embodiment and 2nd Embodiment, and the detailed description is abbreviate|omitted.

[0149] Figure 9 and Figure 10 The main locking member 40-3 of the lens barrel 1-3 of the illustrated third embodiment is different from the locking member 40-2 of the lens barrel 1-2 of the second embodiment.

[0150] like Figure 9 and Figure 10As shown, the locking member 40 - 3 of the lens barrel 1 - 3 of the third embodiment is rotatably supported around a rotation axis parallel to an optical axis different from the optical axis of the optical member (focus lens 20 ).

[0151] The locking member 40 - 3 is locked by the rotational driving force applied from the elec...

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Abstract

Provided are a lens barrel and an image pickup device, in which an optical member that is freely movable in an optical axis direction inside the lens barrel during no application of electric current,can be locked, and the locked state of the optical member can be maintained with no use of particular electric power. A movable frame (22) holding a focus lens (20) is driven in an optical path direction by a linear motor. When the movable frame (22) is locked with no electric current applied to the linear motor, the movable frame (22) (engagement part (24)) is caused to abut, at an end of the movable range of the movable frame 22, against a restriction part (12), and further, a lock ring (40) is rotated to a lock position by means of an electric actuator (50). As a result, the movable frame (22) is fixed in an unmovable manner by the restriction part (12) and a lock portion (40A) of the lock ring (40). The electric actuator (50) includes a worm gear (56) as a motive power transmission mechanism. An irreversible rotation function of the worm gear (56) enables holding of the lock ring (40) at the lock position.

Description

technical field [0001] The invention relates to a lens barrel and an imaging device, in particular to a technology for fixing optical components when the optical components such as focusing lens groups in the lens barrel are not restricted due to power off or the like. Background technique [0002] There is known an imaging device using a linear motor as an actuator for moving a focus lens group in the lens barrel in the optical axis direction. When this camera device is not in a shooting state (for example, when the power is turned off or during playback), the linear motor is in a power-off state, so that the focusing lens group is not restricted. [0003] When the linear motor is powered off, if the user shakes the camera, the focus lens group moves and collides with the end of the movable range of the focus lens group, causing the impact to be transmitted to the hand or to generate impact noise. In addition, when there is garbage in the lens barrel, the garbage moves due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04G03B17/02H02K41/02
CPCG03B17/02H02K7/14H02K7/1166H02K7/102G02B7/08G02B7/04H02K41/0356
Inventor 阿部刚也星野谦治小林英雄川锅裕一
Owner FUJIFILM CORP
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