JP2020112597A - Lens device, and imaging apparatus - Google Patents

Abstract

To provide a lens device which is advantageous when, for example, switching between presence and absence of a click.SOLUTION: A lens device comprises: a fixed cylinder; an operation ring disposed around the fixed cylinder; an optical member which is disposed inside the fixed cylinder, and in which a state is changed according to rotational operation of the operation ring; and a click mechanism for generating a click according to rotational operation of the operation ring. In the lens device, the optical member is constituted to be operable in both a first rotation range and a second rotation range of the operation ring that are different from each other, whereas the click mechanism is configured to function in the first rotation range but not in the second rotation range, and the first rotation range and the second rotation range are constituted to be mutually switchable according to another rotational operation of the operation ring that exceeds their respective rotation ranges.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lens device and an imaging device.

2. Description of the Related Art There is a lens device that can capture both still images and moving images and can switch whether or not a click is made during rotation of the iris ring. When capturing a still image, there is an advantage that the F value (F2.8, F4,...) Is easily recognized due to the click. In addition, when capturing a moving image, since there is no click, it is easy to continuously change the F value, and there is an advantage that the click sound can be eliminated.

Patent Document 1 discloses a mechanism that switches the presence or absence of a click by pressing a push button and rotating an iris ring. Further, Patent Document 2 discloses a mechanism for switching the presence/absence of a click by pulling and rotating an iris ring in the optical axis direction.

WO2016-039294 Japanese Patent No. 5166597

The invention disclosed in the above-mentioned patent documents requires an operation of a member other than the iris ring or a special operation of the iris ring to switch presence/absence of a click, which is disadvantageous in terms of the number of parts or operability.

An object of the present invention is, for example, to provide a lens device that is advantageous for switching whether or not there is a click.

In order to achieve the above object, the lens device of the present invention includes a fixed barrel, an operation ring arranged around the fixed barrel, and a fixed ring, the state of which is changed by a rotating operation of the operation ring. And a click mechanism that generates a click by rotating the operation ring, wherein the optical member operates in any of a first rotation range and a second rotation range of the operation ring different from each other. Possibly, the click mechanism functions in the first rotation range and does not function in the second rotation range, and the first rotation range and the second rotation range exceed the respective rotation ranges. It is characterized in that they are configured so that they can be switched to each other by further rotating operation of the operation ring.

According to the present invention, for example, it is possible to provide a lens device that is advantageous for switching the presence/absence of a click.

Side view of the lens device of the present invention Sectional view of the click mechanism in the click mode of the present invention Exploded perspective view of the click mechanism of the present invention Rear view of the iris ring of the present invention Exploded view of the click mechanism in the click mode of the present invention Sectional view of the click mechanism when switching between click and non-click according to the present invention Exploded view of the click mechanism when switching between click and non-click according to the present invention Sectional view of the click mechanism in the non-click mode of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a lens apparatus according to a first embodiment of the present invention will be described with reference to FIG.
The lens 100 is a lens device that can be attached to a digital camera capable of shooting moving images. A focus ring 11, a zoom ring 10, and an iris ring 1 are supported on the outer periphery of the fixed barrel 2 from the front of the optical axis (xx) so as to be rotatable around the optical axis. The focus ring 11, the zoom ring 10, and the iris ring (operation ring) 1 are respectively provided with a subject distance scale 11a, a focal length scale 10a, a Tno. The scale 1a is engraved. When the focus ring 11, the zoom ring 10, and the iris ring (operation ring) 1 are rotated, the corresponding focus lens, zoom lens, and iris (aperture) are driven, and the object distance is adjusted by aligning the scale with the index 100a. (Object distance), focal length, Tno. Change (adjust) the (light intensity). The scale and the index are also engraved on the opposite side of the paper surface, and are visible from both sides of the lens 100 with the optical axis sandwiched therebetween. Here, Tno. Is the brightness that actually reaches the sensor, considering the transmittance of the lens.

The iris ring 1 is provided with a click mechanism, and a predetermined Tno. It is possible to switch between a click mode that gives a click feeling when changing and a non-click mode that allows a smooth operation without a click feeling. In the click mode, it is possible to switch to the non-click mode by further rotating after setting to the end (open value or Close) of the use rotation range. Details of the switching function will be described later.

Next, the configuration of the click mechanism of the iris unit in this embodiment will be described with reference to FIGS. FIG. 2 is a sectional view of the click mechanism in the click mode state. FIG. 3 is an exploded perspective view of the click mechanism. FIG. 4 shows the iris ring 1 viewed from the optical axis direction.

As shown in FIG. 2, the fixed barrel 2 holds the iris unit 200 on the inner peripheral side. The iris unit 200 includes a blade 3, an iris base 4, and an iris cam 5. When the iris cam 5 is rotated, the blades 3 move inward along the cam and the Tno. Can be changed. The iris pin (rotating member) 6 is an interlocking member that fits into the iris ring 1 and the iris cam 5, and transmits the rotational operation amount of the iris ring 1 to the iris unit 200.

On the surface (second surface) in the optical axis direction of the fixed barrel 2, a notch (recess) through which the iris pin 6 passes when the iris ring 1 is rotated is provided along an arc around the optical axis. There is. A plurality of click grooves 2a are formed on the optical axis direction surface (bottom portion) of the cutout portion, and both ends of the sloped surface 2b and the movement range of the iris pin 6 in the rotation direction of the iris ring 1 (first rotation range, second rotation range). Both end faces 2c (see FIGS. 5 and 7) that are the ends of the rotation range) are formed.

On the side surface (first surface) of the iris ring 1, a first fitting groove (first groove) 1b and a second fitting groove (second groove) 1c are arranged at 180° symmetrical positions (rotation) in the optical axis direction. It is formed at a rotationally symmetric position with respect to the direction and a position facing each other in the optical axis direction). A rear fixed barrel 9 is fixed to the fixed barrel 2 behind the iris ring 1. The rear fixed barrel 9 holds a spring (elastic member) 8, and the spring 8 biases the iris pin 6 in the optical axis direction via a sliding ring 7.

The iris pin (engagement member) 6 is configured to be rotatable about the optical axis within the notch (recess), and when the iris ring 1 is at a position of a predetermined rotation angle with respect to the iris ring 1, Engage and rotate to change the aperture of the diaphragm (imaging conditions). That is, in the click mode, the iris pin 6 is fitted in the first fitting groove 1b to operate the iris unit 200 and can contact the optical axis direction surface (bottom) of the cutout portion. A click feeling is given because the shaft is rotated while being pressed against the axial surface (bottom portion) and is urged by the click groove 2a. In the non-click mode, the iris unit 200 is operated by being fitted into the second fitting groove 1c and is not biased by the click groove 2a, so that there is no click feeling and smooth operation is possible.

The iris ring 1 has a Tno. The scale 1a is engraved symmetrically with 180°. Therefore, when the click mode is switched to the non-click mode by rotating the iris ring by 180°, the Tno. The scale 1a can be used as it is. That is, the iris can be operated in any of two different moving ranges (first rotating range and second rotating range) of the iris ring 1.

Next, movements of the click mechanism in the click mode, the switching mode, and the non-click mode will be described with reference to FIGS. 2 and 5 to 8.

The movement of the click mechanism when the aperture is narrowed down by one step in the click mode is shown in FIGS. Here, in FIG. 5, the vertical direction is the optical axis direction. The iris pin 6 has a first fitting diameter 6a and a second fitting diameter 6b, and is fitted in the connecting groove 5a of the iris cam 5 and the first fitting groove 1b of the iris ring 1, respectively. As shown in FIG. 5, the bottom surface of the first fitting groove 1b is located in front of the click groove 2a in the optical axis direction. Therefore, the spring 8 biases the iris pin 6 toward the click groove 2a.

When the iris ring 1 is rotated in the Close direction from the open state shown in FIG. 5A, the state shown in FIG. 5B is obtained. At this time, the iris pin 6 is biased by the spring 8 toward the click groove 2a, and therefore moves along the click groove 2a in the optical axis direction. When the state of FIG. 5B is further rotated in the Close direction and T4 is set, the state of FIG. 5C is obtained. At this time, since the iris pin 6 is biased by the spring 8, it fits in the click groove 2a and gives (generates) a click feeling. As described above, the representative Tno. When set to, the click groove 2a is formed so as to give a click feeling.

Next, switching from the click mode to the non-click mode will be described with reference to FIGS. 6 is a sectional view of the click mechanism in the mode switching state, FIG. 8 is a sectional view of the click mechanism in the non-click mode, and FIGS. 7A to 7D are clicks when switching from the click mode to the non-click mode. The movement of the mechanism is shown. Here, in FIG. 7, the vertical direction is the optical axis direction.

FIG. 7A shows a state when Close is set in the click mode. When the iris ring 1 is further rotated from this state, the iris pin 6 contacts the slope 2b as shown in FIG. 7B.

When the iris ring 1 is further rotated from the state shown in FIG. 7B, the state shown in FIG. 7C is obtained. At this time, the iris pin 6 moves in the optical axis direction along the inclined surface (shape) 2b, and the movement range of the iris pin 6 in the rotation direction is restricted by the end surface 2c, so that the iris pin 6 falls from the first fitting groove 1b. To do. That is, the interlocking of the iris ring 1 and the iris unit 200 is released, the iris pin 6 is urged to the end surface 2c, and only the iris ring 1 is rotatable. At this time, as shown in FIG. 6, the iris pin 6 slides on the slope 2b while compressing the spring 8, and the rotation torque becomes heavier than in the click mode. It can be recognized by the operation feeling of the ring 1.

When the iris ring 1 is further rotated from the state shown in FIG. 7C (the state at the end of the first rotation range) (to the direction outside the first rotation range), the position of the iris pin 6 remains unchanged and only the iris ring 1 is left. Moves. When rotated by 180° in the switching mode, the state shown in FIG. At this time, since the iris pin 6 and the second fitting groove 1c are in the same phase, the iris pin 6 urged by the spring 8 fits in the second fitting groove 1c, and the iris unit 200 can be operated. At this time, the depth of the second fitting groove 1c is shallower than that of the first fitting groove 1b, and the bottom surface is located behind the click groove 2a (side away from the click groove 2a in the cutout portion of the fixing portion). There is. Therefore, the iris pin 6 is urged by the spring 8 toward the bottom surface of the second fitting groove 1c and is in the non-click mode in which it is not urged by the click groove 2a, and the Tno. Can be changed.

As described above, the first fitting groove 1b that fits the iris pin 6 in the click groove 2a so as to be biased and the second fitting groove 1c that fits in the click groove 2a without being biased are formed. By doing so, it is possible to switch between click and non-click by changing the groove into which the iris pin 6 is fitted.

Further, slopes 2b are formed on both ends of the click groove 2a. With such a configuration, it is possible to switch to the fitting from the first fitting groove 1b to the second fitting groove 1c only by rotating the iris ring 1 from the Close position, so that the operability is improved. Can be made. Moreover, since the click mechanism is configured by the iris pin 6 which is the interlocking member of the iris ring 1 and the iris unit 200, it is not necessary to use a dedicated member for giving a feeling of click, so that the number of parts can be reduced. it can.

In this embodiment, the movement of switching the click by further rotating the iris ring 1 after setting the position of the iris to Close has been described. However, as shown in FIGS. 3 and 5, a similar slope 2b is formed on the open side. doing. Therefore, it is possible to switch the presence/absence of a click by an operation of further rotating after setting to open. Further, in the present embodiment, the iris ring 1 is provided with the click switching mechanism, but the focus ring 11 and the zoom ring 10 may be provided with the similar click switching mechanism.

In the embodiment, the present invention is applied to the configuration in which the mechanism for giving the click feeling is realized by utilizing the iris pin, but the present invention is not limited to this configuration. For example, the mechanism for giving a click feeling is replaced with the combined use of iris pin, and the mechanism of the present invention is applied to a ball, a pin, or the elastic member itself as a member dedicated to the click groove/fitting groove. However, the effects of the present invention can be enjoyed. In that case, for example, the click groove 2a is not formed in the cutout portion (first rotation range) of the fixed cylinder 2, and the inclined surface 2b and the end surface 2c are formed at both ends.

In addition, the configuration shown in FIGS. 5 and 7 has a notch in which another click groove is formed not for the iris pin but for a ball, a pin, or an elastic member that is a member for giving a click feeling. Part (second rotation range).
An image pickup device having the lens device of the present invention and an image pickup element arranged on the image plane of the lens device can realize an image pickup device that enjoys the effects of the present invention.

1... Iris ring (operation ring, engaging member)
2 ・・・・ Fixed cylinder 6 ・・・・ Irispin (rotating member)
8... Spring (click mechanism)
1b ... 1st fitting groove (click mechanism)
1c ・・・Second fitting groove (click mechanism)
2a ・・・ Click groove (click mechanism)
2b...Slope (click mechanism)

Claims (7)

Fixed tube,
An operation ring arranged around the fixed cylinder,
An optical member arranged in the fixed cylinder, the state of which is changed by a rotating operation of the operation ring,
A click mechanism that generates a click by rotating the operation ring,
Have
The optical member is operable in any of a first rotation range and a second rotation range of the operation ring different from each other, and the click mechanism functions in the first rotation range and functions in the second rotation range. In addition, the first rotation range and the second rotation range are respectively configured to be switchable by further rotation operation of the operation ring that exceeds the respective rotation ranges.
A lens device characterized by the above. The operation ring has a first surface on which a first groove and a second groove having different depths in the optical axis direction are formed,
The fixed barrel has a second surface in which a concave portion in the direction of the optical axis is formed along an arc around the optical axis,
The click mechanism includes a rotating member that can contact the recess and can rotate about the optical axis, and an elastic member that urges the rotating member toward the first surface and the second surface. ,
The recess is formed with a click groove,
When the rotary member is fitted in the first groove, the rotary member can be fitted in the click groove, and when the rotary member is fitted in the second groove, The rotating member is configured so that it cannot fit into the click groove,
The lens device according to claim 1, wherein: The lens device according to claim 2, wherein the rotating member is fitted into one of the first groove and the second groove depending on a rotation angle of the operation ring and a shape of the recess. The lens device according to claim 2, wherein the rotation member connects the operation ring and the optical member. The lens device according to any one of claims 2 to 4, wherein the first groove and the second groove are arranged at positions facing each other with respect to the optical axis. The lens according to any one of claims 1 to 5, wherein the optical member includes an optical member for adjusting at least one of a light amount, an object distance, and a focal length. apparatus. A lens device according to any one of claims 1 to 6,
An image sensor arranged on the image plane of the lens device;
An imaging device comprising:

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