JPH07181538A - Anti-vibration lens barrel - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Easy and highly accurate alignment of the image stabilization sensor with the optical axis of the photographic optical system. A vibration-proof lens mirror including a shake sensor 8 for detecting shake vibration, a fixed barrel 1 integrated with a lens mount, and a substrate 9 for fixing the shake sensor 8 and mounted on the fixed barrel 1. A rotation center screw 14 that rotatably supports the substrate 9 with respect to the fixed barrel 1, an adjustment groove 9b formed in the substrate 9, and a fixed groove that is rotatably provided in the fixed barrel 1. The position adjusting means including the eccentric tool 15 having the eccentric cam portion that engages with 9b is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration lens barrel capable of preventing camera shake by moving an anti-vibration optical system in a direction substantially perpendicular to an optical axis based on an output from an image sensor. Is.

[0002]

2. Description of the Related Art As a conventional anti-vibration lens barrel, for example,
A shake sensor that detects shake vibration, a shake prevention optical system that moves in a direction substantially perpendicular to the optical axis direction to correct shake, and a control signal based on the output from the shake sensor drive the shake prevention optical system. A device including a vibration isolation mechanism is known.

[0003]

However, in the conventional antivibration lens barrel described above, the horizontal axis (X
An angular velocity sensor for detecting the angular velocity around the axis) and the angular velocity around the vertical axis (Y axis) is used, but there is a problem that it takes time to adjust the position of each angular velocity sensor and the optical axis of the photographing optical system. It was

Further, in order to accurately position the sensitivity direction of the angular velocity sensor, the cumulative error is prevented from increasing.
Although it is desired to arrange the lens mount as close as possible to the lens mount that is the reference position of the lens barrel, there is a problem that the diaphragm mechanism unit, the AF driving force transmission unit, and the like are already arranged, and there is not enough installation space.

A first object of the present invention is to provide an anti-vibration lens barrel in which the alignment of the anti-vibration sensor with the optical axis of the photographing optical system can be easily and highly accurately performed. A second object of the present invention is to provide an anti-vibration lens barrel in which two anti-vibration sensors are rationally arranged in a limited installation space.

[0006]

In order to solve the above-mentioned problems, the first solving means of the vibration-proof lens barrel according to the present invention is
In an anti-vibration lens barrel equipped with a shake sensor (8) for detecting shake vibration, position adjusting means (14, 14) for adjusting the sensitivity direction of the shake sensor (8) with respect to the optical axis of the photographing optical system.
15) is provided.

A second solving means is to fix a shake sensor (8) for detecting shake vibration, a fixed cylinder (1) integrated with a lens mount (2), and the shake sensor on the fixed cylinder. In a vibration-proof lens barrel including a substrate (9) mounted on the substrate, a rotation center shaft (14) that rotatably supports the substrate with respect to the fixed barrel, and an adjustment groove ( 9b) and a position adjusting member (15) that is rotatably provided on the fixed cylinder and has an eccentric cam portion that engages with the adjusting groove.

According to a third solution means, in the vibration-proof lens barrel of the second solution means, a fixing member (18) for fixing the substrate to the fixed tube is provided after the adjustment by the adjusting member. It is characterized by that.

A fourth solving means is to fix a shake sensor (8) for detecting shake vibration, a fixed cylinder (1) integrated with a lens mount (2), and the shake sensor on the fixed cylinder. In a vibration-proof lens barrel having a substrate (9) mounted on the fixed barrel, two plane portions (1X, 1Y) for fixing the substrate are provided at positions orthogonal to each other on the fixed barrel, and the shake sensor is provided. Is characterized in that two pieces are arranged on the plane portion with a predetermined amount (Δ) shift in a direction in which they approach each other.

[0010]

According to the first solving means, since the sensitivity direction of the shake sensor can be adjusted by the position adjusting means, the position can be easily adjusted. Further, according to the second solving means, since the substrate is supported on the fixed cylinder by the rotation center axis and the position adjusting member having the eccentric cam portion is rotated, the position can be easily adjusted by the extremely simple structure. it can. According to the third solving means, since the position is fixed by the fixing member after the position adjustment, there is no positional deviation after the adjustment.

According to the fourth solution means, since the two shake sensors are arranged by shifting by a predetermined amount in the direction in which they approach each other, two shake sensors can be reasonably arranged in a limited installation space.

[0012]

EXAMPLES Examples will be described below with reference to the drawings.
This will be described in more detail. FIG. 1 is a sectional view showing an embodiment of an anti-vibration lens barrel according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a plan view showing a mounting portion of a shake sensor. The fixed barrel 1 is integrally fixed with a lens mount 2 that is coupled to a mount of a camera body (not shown). In front of the optical axis of the fixed barrel 1, a front fixed barrel 3 holding the fixed lens L1 is fixed. A focus ring 4 is rotatably attached to the outer periphery of the front fixed barrel 3.

The focus ring 4 adjusts the focus by moving the focus lens L2 in the front-back direction of the optical axis L by a lens moving mechanism (not shown). A segment gear 5 is provided at the rear end of the focus ring 4,
The pinion gear 6 is engaged. This Pinion Ga 6
Is driven by a motor through drive shafts 7-1 and 7-2 connected to an AF drive device (not shown) on the camera body side. Therefore, the focus lens L2 can selectively perform the manual operation by the focus ring 4 and the AF driving of the AF driving device.

A diaphragm ring 16 is provided on the rear outer periphery of the fixed barrel 1, and a diaphragm of a diaphragm unit 17 provided in front of the fixed barrel 1 through the interlocking mechanism (not shown). Can be set.

The angular velocity sensor 8 is a sensor for detecting camera shake vibration, and as shown in FIG. 2, an angular velocity sensor 8X for detecting an angular velocity around the X axis and an angular velocity sensor 8Y for detecting an angular velocity around the Y axis. It is provided. The angular velocity sensor 8 is mounted on the fixed barrel 1 via a glass epoxy substrate 9.
It is fixed on. Since the lens mount 2 is integrally fixed to the fixed barrel 1 as described above, the vertical position of the camera body and the X-axis of the angular velocity sensors 8X and 8Y,
Positional accuracy with respect to the Y axis can be accurately obtained.

The angular velocity sensor 8 is connected to a connector 10 fixed to a board 9, and the connector 10 is an FPC.
It is connected via a (flexible printed circuit board) 11 to an image stabilization control device (not shown) on the camera body side.

The antivibration unit housing 12 is a fixed cylinder 1.
Is attached to the front of the optical axis, and the vibration isolation mechanism portion 13 is fixed inside thereof. This image stabilization mechanism section 13 is based on a control signal from the image stabilization control apparatus on the camera body side.
This is a mechanism for moving the image stabilizing lens L3 in a direction substantially perpendicular to the optical axis L. The outer periphery of the vibration isolation mechanism 13 is covered with a cover 19.

Next, the mounting method and the position adjusting method of the angular velocity sensor 8 will be described in more detail. As shown in FIG. 2, the fixed cylinder 1 is provided with two plane portions 1X and 1Y at positions orthogonal to each other on the outer peripheral surface. Substrates 9X and 9Y to which the angular velocity sensors 8X and 8Y are fixed are mounted on the plane portions 1X and 1Y. This board 9
X and 9Y are arranged to be shifted by a predetermined shift amount Δ in a direction in which they approach each other with respect to the orthogonal X axis and Y axis. The reason why the substrates 9X and 9Y are shifted and arranged in this way is to secure a space S1 for inserting the diaphragm mechanism section and a space S2 for inserting the AF driving force transmitting section.

As shown in FIG. 3, a rotation center hole 9a is formed in the substrate 9, and a stepped rotation center screw 14 is fastened to the fixed barrel 1 through the rotation center hole 9a. . The rotation center screw 14 fixes the substrate 9 to the fixed tube 1
Is the center of rotation for rotating by the adjustment angle θ. A tool hole 1b is formed in the fixed cylinder 1, and an eccentric tool 15 is rotatably attached to the tool hole 1b. The eccentric tool 15 has an eccentric cam portion at its head, and the eccentric cam portion has an adjustment groove 9 b formed on the substrate 9.
Is engaged with. Further, a long hole 9c is formed outside the angular velocity sensor 8 of the substrate 9 in the longitudinal direction, and a part of an arc centering on the rotation center hole 9a is formed. The fixing screw 18 is fixed through the long hole 9c. It can be fastened to the cylinder 1.
The fixing screw 18 is provided in the longitudinal direction of the angular velocity sensor 8 because if it is tightened in the sensitivity direction (vertical direction in FIG. 3), distortion may occur.

The eccentric tool 15 is rotated to rotate the substrate 9 about the rotation center screw 14 and to rotate the eccentric tool 15 by an arbitrary adjustment angle θ with respect to the optical axis L, and the output of the angular velocity sensor 8 is maximized. The substrate 9 is fixed to the fixed cylinder 1 by the fixing screw 18 at the position. This adjustment is similarly performed for the angular velocity sensors 8X and 8Y. Eccentric tool 1
After fixing 5 with the fixing screw 18, it may be removed or may be attached as it is.

[0021]

As described in detail above, according to the first aspect, since the position adjusting means can adjust the sensitivity direction of the shake sensor, the position can be easily adjusted. Further, according to claim 2, the substrate is supported on the fixed cylinder by the rotation center axis,
Since the position adjusting member having the eccentric cam portion is rotated, the position can be easily adjusted with an extremely simple structure. According to the third aspect, since the position is fixed by the fixing member after the position is adjusted, there is no positional deviation after the adjustment.

According to the fourth aspect, since the two shake sensors are arranged by shifting them by a predetermined amount in a direction in which they approach each other, two shake sensors can be reasonably arranged in a limited installation space. is there.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an anti-vibration lens barrel according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a plan view showing a mounting portion of a shake sensor.

[Explanation of symbols]

 1 Fixed Cylinder 2 Lens Mount 3 Front Fixed Cylinder 4 Focus Ring 5 Segment Gear 6 Pinion Gear 7 Drive Axis 8 (8X, 8Y) Accelerometer 9 Board 10 Connector 11 FPC 12 Vibration Isolation Unit Housing 13 Vibration Isolation Mechanism Section 14 Rotation Center Screw 15 Eccentric tool 16 Drawing ring 17 Drawing unit 18 Fixing screw 19 Cover

Claims (4)

[Claims] 1. An anti-vibration lens barrel having a shake sensor for detecting shake vibration, comprising position adjusting means for adjusting a sensitivity direction of the shake sensor with respect to an optical axis of a photographing optical system. Swing lens barrel. 2. An anti-vibration lens barrel including a shake sensor that detects shake vibration, a fixed barrel integrated with a lens mount, and a substrate that fixes the shake sensor and is mounted on the fixed barrel. In, a rotation center shaft that rotatably supports the substrate with respect to the fixed cylinder, an adjustment groove formed in the substrate, and the adjustment groove that is rotatably provided on the fixed cylinder and engages with the adjustment groove. A vibration-proof lens barrel comprising a position adjusting member having an eccentric cam portion. 3. The vibration-proof lens barrel according to claim 2, further comprising a fixing member for fixing the substrate to the fixed cylinder after the adjustment by the adjusting member. Lens barrel. 4. An anti-vibration lens barrel including a shake sensor for detecting shake vibration, a fixed barrel integrated with a lens mount, and a substrate for fixing the shake sensor and mounted on the fixed barrel. In the above, two plane parts for fixing the substrate are provided at positions orthogonal to each other on the fixed cylinder, and two shake sensors are arranged on the plane part by shifting a predetermined amount in directions toward each other. Anti-vibration lens barrel.