JP6827170B2 - Lens barrel and camera equipped with it - Google Patents

Description

The present disclosure relates to a lens barrel and a camera including the lens barrel.

A lens hood may be attached to the tip of the lens barrel in order to block unnecessary light that causes flare or ghost. Since most of unnecessary light is blocked by the lens hood on the lens barrel to which the lens hood is attached, the occurrence of flare and ghost can be suppressed. For example, Patent Document 1 describes a hood body that is rotatably and lockably attached to a hood bayonet member that is bayonet-coupled to the lens barrel front frame, and a hood body that is slidable and lockable in the optical axis direction. A lens hood with an attached shading plate is disclosed.

When the lens hood is extended toward the subject when moving to the use position, the elastic protrusion provided on the light-shielding plate moves along the guide groove provided on the hood body along the optical axis direction. This guide groove has a portion whose size is enlarged in the width direction (circumferential direction), and the elastic protrusion is fitted into the enlarged portion of the groove width to hold the lens hood.

Japanese Unexamined Patent Publication No. 6-82880

However, the conventional lens hood holding structure may cause a problem in terms of strength.

The lens barrel according to the present disclosure includes a tip member, a lens hood, a first sliding member, a second sliding member, a first convex portion, and a second convex portion . The tip member is arranged on the subject side in the optical axis direction, and includes an optical system. The lens hood is attached to the tip member. The lens hood moves in the optical axis direction between a predetermined storage position and a usage position in which the lens hood projects toward the subject from the storage position. The first sliding member is provided on the inner peripheral surface side of the lens hood. When the lens hood moves from the storage position to the use position, the first sliding member moves toward the subject in the optical axis direction in a state of being in contact with the outer peripheral surface of the tip member. The second sliding member is attached to the outer peripheral surface side of the tip member. The first convex portion projects from the inner peripheral surface of the lens hood and holds the subject side of the first sliding member. The second convex portion projects from the outer peripheral surface of the tip member and holds the image plane side of the second sliding member. At least in the above-mentioned use position, the lens hood is supported by the first sliding member and the second sliding member. When the lens hood moves from the storage position to the use position toward the subject, the lens hood and the tip member do not come into contact with each other. When the lens hood is in the storage position, a part of the gap formed between the inner peripheral surface of the lens hood and the outer peripheral surface of the tip member becomes narrower toward the subject in the optical axis direction. There is. Then, when the lens hood is in the used position, the first convex portion and the second convex portion do not come into contact with each other.

The camera of the present disclosure includes a lens barrel of the present disclosure and a camera body to which the lens barrel is mounted.

The lens barrel and camera according to the present disclosure can reduce the load on the strength surface.

FIG. 1 is an overall perspective view showing a configuration of a camera including a lens barrel including a lens hood holding structure according to an embodiment of the present disclosure and a camera body. FIG. 2A is a perspective view showing a state in which the optical system of the lens barrel of FIG. 1 is on the wide-angle side (WIDE position). FIG. 2B is a perspective view showing a state in which the optical system of the lens barrel of FIG. 2A is moved to the telephoto side (TELE position). FIG. 3A is a cross-sectional view of the lens barrel of FIG. 2A. FIG. 3B is a cross-sectional view of the lens barrel of FIG. 2B. FIG. 4 is an exploded perspective view of each component constituting the lens barrel of FIG. 1. FIG. 5 is an exploded perspective view showing the configuration of a main part of the lens barrel of FIG. 1. FIG. 6 is a cross-sectional view showing a state in which the lens hood attached to the tip of the lens barrel of FIG. 1 is in the storage position. FIG. 7 is a cross-sectional view showing a state in which the lens hood attached to the tip of the lens barrel of FIG. 1 is in the used position. FIG. 8A is a cross-sectional view schematically showing the position of the sliding member in a state where the lens hood attached to the tip end portion of the lens barrel of FIG. 1 is in the storage position. FIG. 8B is a cross-sectional view schematically showing the position of the sliding member when the lens hood attached to the tip of the lens barrel of FIG. 1 is in the used position. FIG. 9 is an exploded perspective view showing a configuration of a lens barrel provided with a lens hood holding structure according to another embodiment of the present disclosure. FIG. 10 is a cross-sectional view schematically showing the position of a sliding member in a state where the lens hood attached to the tip end portion of the lens barrel according to another embodiment of the present disclosure is in the storage position.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art.

It should be noted that the applicant is not intended to limit the subject matter described in the claims by those skilled in the art by providing the accompanying drawings and the following description in order to fully understand the present disclosure. Absent.

(Embodiment 1)
The lens barrel and the camera provided with the lens barrel according to the embodiment of the present disclosure will be described with reference to FIGS. 1 to 8B.

1. 1. Camera Configuration As shown in FIG. 1, the camera 100 according to the present embodiment includes a camera body 50 and a lens barrel 10. The camera body 50 includes an image sensor, a storage unit, and a control unit. The image sensor converts the light from the lens barrel 10 into an electric signal. The control unit controls the optical system included in the image sensor and the lens barrel 10. The storage unit stores the electric signal generated by the image sensor as digital data.

2. 2. Configuration of Lens Lens Cylinder The lens barrel 10 according to the present embodiment includes an optical system including lenses L1 to L18 shown in FIGS. 3A and 3B, a lens hood 30 shown in FIG. 5, a filtering 31 and a sliding member 32a. And a sliding member 32b. As shown in FIG. 1, the lens barrel 10 is attached to the mount portion of the camera body 50.

Here, the X-axis direction shown in FIG. 1 is the optical axis direction of the optical system of the lens barrel 10. Hereinafter, the subject side in the optical axis direction means the side opposite to the image plane side of the camera body 50. The image plane side is the side where the image sensor is located. Hereinafter, the optical axis direction of the optical system of the lens barrel 10 will be referred to as the optical X-axis direction.

As shown in FIGS. 2A and 2B, the lens barrel 10 has an optical system built in the lens barrel 10 that moves between the wide-angle side (WIDE position) and the telephoto side (TELE position) in the optical axis X direction. This makes it possible to perform variable magnification photography.

When the lens barrel 10 is in the WIDE position shown in FIG. 2A, as shown in FIG. 3A, the group 1 unit 11 of the optical system described later is housed on the inner peripheral surface side of the exterior unit 19.

On the other hand, when the lens barrel 10 is in the TELE position shown in FIG. 2B, as shown in FIG. 3B, the group 1 unit 11 moves toward the subject along the optical axis X direction, and is closer to the subject than the exterior unit 19. It will be in a protruding state.

2-1. Optical system configuration As shown in FIG. 4, the optical system of the lens barrel 10 includes a group 1 unit 11, a group 2 unit 12, a cam frame 13, a fixed frame 14, a group 3 unit 15, and a group 4. It is composed of a unit 16, a 5-group unit 17, a mount base 18, an exterior unit 19, a rear frame 20, and the like.

The group 1 unit 11 is a tubular member. As shown in FIG. 5, a spiral groove is formed as a threaded portion 11a on the outer peripheral surface of the group 1 unit 11. Then, as shown in FIGS. 3A and 3B, the lenses L1 to L3 are arranged inside the group 1 unit 11 and on the subject side. The group 1 unit 11 moves forward and backward along the optical axis X direction while holding the lenses L1 to L3 on the subject side. As a result, the distance between the lenses L1 to L18 changes, and wide-angle shooting and telephoto shooting can be performed.

As shown in FIGS. 3A, 3B, and 4, the second group unit 12 is a cylindrical member arranged on the inner peripheral surface side of the first group unit 11. The second group unit 12 holds the lenses L4 to L9. The lenses L4 to L9 are arranged on the image plane side in the optical axis X direction with respect to the lenses L1 to L3.

The third group unit 15 holds the lenses L10 to L15 as shown in FIGS. 3A and 3B. The third group unit 15 is arranged on the image plane side in the optical axis X direction with respect to the second group unit 12. Further, as shown in FIG. 4, the third group unit 15 is arranged on the inner peripheral side of the cylindrical fourth group unit 16. By being driven by the actuator, the group 3 unit 15 moves back and forth in the optical axis X direction while holding the lenses L10 to L15.

The fourth group unit 16 is a member having a substantially cylindrical shape. The fourth group unit 16 holds the lens L16 as shown in FIGS. 3A and 3B. As shown in FIG. 4, the 4th group unit 16 is arranged on the downstream side of the 3rd group unit 15 when viewed from the subject side in the X direction of the optical axis. The lens L16 is arranged on the image plane side in the optical axis X direction with respect to the lenses L10 to L15.

The group 5 unit 17 holds the lens L17 and the lens L18 as shown in FIGS. 3A and 3B. As shown in FIG. 4, the 5th group unit is arranged on the inner peripheral side of the cylindrical 4th group unit 16. The lens L17 and the lens L18 are arranged on the image plane side in the optical axis X direction with respect to the lens L16. The group 5 unit 17 can move in the X direction of the optical axis. Specifically, the group 5 unit 17 moves back and forth in the optical axis X direction by being driven by an actuator while holding the lens L17 and the lens L18.

As shown in FIG. 4, the cam frame 13 is a cylindrical member. A cam groove is formed in the cam frame 13. The cam frame 13 is arranged on the outer peripheral surface side of the second group unit 12, the third group unit 15, the fourth group unit 16, and the fixed frame 14. Then, a cam pin provided on the outer peripheral surface of the 4th group unit 16 is fitted into the cam groove of the cam frame 13.

The cam pin of the 4th group unit 16 moves along the cam groove in response to the rotational driving force applied from the rotational driving source. As a result, the group 1 unit 11 to the group 5 unit 17 can be moved back and forth in the optical axis X direction. Since the distance between the lenses L1 to L18 included in the 1st group unit 11 to the 5th group unit 17 can be adjusted, wide-angle shooting, telephoto shooting, and the like can be performed.

As shown in FIG. 4, the fixed frame 14 is a cylindrical member. The fixed frame 14 is arranged on the outer peripheral side of the third group unit 15 and the fourth group unit 16. The fixed frame 14 is arranged on the inner peripheral side of the cam frame 13.

As shown in FIG. 4, the mount base 18 is a substantially cylindrical member that serves as a base for the lens barrel 10. A group 4 unit 16 is fixed to the inner peripheral surface side of the mount base 18. Further, the cam frame 13 is attached to the mount base 18 so as to be relatively rotatable.

As shown in FIGS. 2A and 4, the exterior unit (front frame) 19 is a cylindrical member that constitutes the exterior portion of the lens barrel 10. An annular focus ring, zoom ring, and the like are attached to the outer peripheral surface of the exterior unit 19 in a rotatable state.

The rear frame 20 is attached to an end portion of the exterior unit 19 on the image plane side. The rear frame 20 constitutes the exterior portion of the lens barrel 10 together with the exterior unit 19. The rear frame 20 is attached so as to rotate relative to the mount base 18 and the exterior unit 19.

Further, the rear frame 20 includes the circuit board 25 shown in FIGS. 3A and 3B, a flexible board electrically connected to the circuit board 25, a switch, and the like.

As shown in FIGS. 2A and 2B, a tripod mount 21 is attached to the outer peripheral surface of the rear frame 20. The tripod mount 21 is a pedestal portion to which the tripod is connected.

Further, as shown in FIGS. 2A and 2B, a tripod lock screw 22 is attached to the outer peripheral surface of the rear frame 20. Since the rear frame 20 is attached to the mount base 18 and the exterior unit 19 so as to be relatively rotatable, the tripod lock screw 22 restricts the relative rotation of the frame 20 at a predetermined position. Specifically, the tripod lock screw 22 regulates the relative rotation of the rear frame 20 by applying a pressing force in a direction intersecting the optical axis X direction.

2-2. Filtering configuration As shown in FIG. 5, the filtering 31 is a cylindrical member. The outer diameter of the filtering 31 is slightly smaller than the inner diameter of the lens hood 30. Further, the filtering 31 has an inner peripheral surface 31a and an outer peripheral surface 31b. A spiral groove is formed as a threaded portion 31aa at a position of the inner peripheral surface 31a closer to the image plane side in the optical axis X direction. The filtering 31 is provided at the tip portion of the group 1 unit 11 on the subject side in the optical axis X direction. More specifically, by screwing the screw portion 31aa of the filtering 31 and the screw portion 11a of the group 1 unit 11, the filtering 31 is held at the tip of the group 1 unit 11 on the subject side. The filtering 31 is used, for example, to protect the lens L1 of the group 1 unit 11. Further, the filtering 31 is used as a base for attaching the lens hood 30, for example.

Here, the filtering 31 and the group 1 unit 11 form the tip member of the present disclosure. The filtering 31 and the group 1 unit 11 may have a mechanically separable configuration or may be integrally formed. In the present embodiment, the filtering 31 and the group 1 unit 11 are mechanically separable.

Further, as shown in FIGS. 8A and 8B, the outer peripheral surface 31b of the filtering 31 has a first holding portion 31bb, an inclined surface 31ba, a convex surface 31bc, and a second holding portion 31bd in the order from the image plane side to the subject side. It has a (recess) and a holding portion 31be.

The first holding portion 31bb is a concave portion in a cross-sectional view. The first holding portion 31bb is provided at the end portion of the outer peripheral surface 31b of the filtering 31 on the image plane side in the optical axis X direction.

The inclined surface 31ba is inclined downward from the subject side toward the image surface side in the X direction of the optical axis.

The convex surface 31bc is a cylindrical surface arranged adjacent to the subject side of the inclined surface 31ba. The convex surface 31bc is provided substantially in the center of the filtering 31 in the X direction of the optical axis.

The second holding portion 31bd is a concave portion in a cross-sectional view. The second holding portion 31bd is provided at a position of the convex surface 31bc adjacent to the subject side in the optical axis X direction. A convex portion 131b is provided between the second holding portion 31bd and the holding portion 31be described later.

The holding portion 31be is a concave portion in a cross-sectional view. The holding portion 31be is provided at the end portion of the outer peripheral surface 31b of the filtering 31 on the subject side in the optical axis X direction. The holding portion 31be holds the sliding member 32b on a surface corresponding to the bottom surface of the concave portion.

2-3. Structure of Lens Hood As shown in FIG. 5, the lens hood 30 is a cylindrical member. The lens hood 30 is provided at the tip of the group 1 unit 11 on the subject side in the X direction of the optical axis via a filtering 31. The lens hood 30 suppresses the incident of unnecessary light during shooting.

FIG. 6 shows a state in which the lens hood 30 is in the storage position. FIG. 7 shows a state in which the lens hood is in the used position. As shown in FIG. 7, the user can use the lens hood 30 by extending it toward the subject along the X direction of the optical axis. The holding structure of the lens hood 30 in the lens barrel 10 in the stored position and the used position will be described in detail later.

As shown in FIGS. 5, 8A and 8B, the inner surface of the lens hood 30 is the inner peripheral surface 30a. Further, as shown in FIGS. 8A and 8B, a holding portion 30b is formed on the inner peripheral surface 30a at a portion closer to the image plane side in the optical axis X direction. The shape of the holding portion 30b is concave. That is, the holding portion 30b is a portion between the convex portion 130b formed on the subject side and the convex portion 230b formed on the image plane side. A sliding member 32a is arranged on the holding portion 30b.

2-4. Configuration of Sliding Member As shown in FIGS. 5, 8A and 8B, the sliding member 32a is an annular member. The material of the sliding member 32a is, for example, a felt material. The sliding member 32a is provided on the inner peripheral surface 30a of the lens hood 30. More specifically, the sliding member 32a is arranged on the holding portion 30b of the inner peripheral surface 30a. One end of the sliding member 32a is fixed to the holding portion 30b.

The sliding member 32b is an annular member. The material of the sliding member 32b is, for example, a felt material. The sliding member 32b is provided on the outer peripheral surface 31b of the filtering 31. More specifically, the sliding member 32b is provided on the holding portion 31be of the outer peripheral surface 31b. One end of the sliding member 32b is fixed to the holding portion 31be.

2-5. Holding structure of lens hood As shown in FIG. 5, the lens hood 30 is attached to the tip of the group 1 unit 11 on the subject side in the X direction of the optical axis via a filtering 31.

Further, as shown in FIGS. 6 and 7, the lens hood 30 is arranged so as to surround the outer peripheral surface 31b of the filtering 31 in a state where it can be slid back and forth in the optical axis X direction. As shown in FIG. 6, the position where the lens hood 30 is closest to the image plane in the optical axis X direction is defined as the storage position. Further, as shown in FIG. 7, the position where the lens hood 30 protrudes toward the subject side from the storage position in the optical axis X direction is defined as the use position. The lens hood 30 slides and moves along the optical axis X direction between the storage position shown in FIG. 6 and the use position shown in FIG. 7. When the lens hood 30 is in the position shown in FIG. 7, the lens hood 30 prevents unnecessary light from entering the optical system (lenses L1 to L18) included in the lens barrel 10.

More specifically, in the storage position shown in FIG. 6, the end portion of the lens hood 30 on the subject side is substantially the same as the end portion of the filtering 31 on the subject side. That is, at the storage position shown in FIG. 6, the lens hood 30 does not project from the end of the filtering 31 on the subject side toward the subject side in the optical axis X direction.

On the other hand, at the use position shown in FIG. 7, the end portion of the lens hood 30 on the subject side is moved toward the subject side in the optical axis X direction from the end portion of the filtering 31 on the subject side. That is, at the use position shown in FIG. 7, the lens hood 30 is in a state of protruding toward the subject in the optical axis X direction from the filtering 31.

As a result, at the use position shown in FIG. 7, the lens hood 30 can suppress the incident of unnecessary light on the lens L1 and the like held by the group 1 unit 11. That is, the cylindrical lens hood 30 projects toward the subject in the X direction of the optical axis and covers the space of the lens L1 held by the group 1 unit 11 on the subject side from the side. As a result, the lens hood 30 can suppress the incident of unnecessary light on the optical system such as the lens L1.

The lens hood 30 is in a state where the annular sliding member (sliding member according to the present disclosure) 32a provided on the inner peripheral surface 30a is in contact with the outer peripheral surface 31b of the filtering 31 and is moved back and forth in the optical axis X direction. Moving. That is, the sliding member 32a moves back and forth in the optical axis X direction together with the lens hood 30 in a state of being in contact with the outer peripheral surface 31b (inclined surface 31ba or the like) of the filtering 31. Further, when the lens hood 30 side moves back and forth in the optical axis X direction, the sliding member 32b is in contact with the inner peripheral surface 30a of the lens hood 30. As a result, the lens hood 30 can be gently slid and moved in the X direction of the optical axis.

Hereinafter, the structure in which the lens hood 30 is held by the filtering 31 at each of the storage position and the use position will be described.

The configuration of the lens hood 30 in the storage position and the filtering 31 is shown in FIG. 8A. One end of the sliding member 32a is fixed to the holding portion 30b of the lens hood 30. The other end of the sliding member 32a is held in a state of being fitted to the concave portion of the first holding portion 31bb of the filtering 31.

On the other hand, one end of the sliding member 32b is fixed to the holding portion 31be of the filtering 31 as described above.

The gap S1 is a cylindrical space formed between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31. The gap S1 is formed with the lens hood 30 in the storage position.

Here, the distance between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31 in the state where the lens hood 30 is in the storage position will be described. The interval indicates the shortest distance in the direction perpendicular to the optical axis X direction.

The distance between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31 at the portion where the sliding member 32a is located is defined as the distance H1. That is, the interval H1 is the interval between the holding portion 30b and the first holding portion 31bb. Further, the distance between the inner peripheral surface 30a and the outer peripheral surface 31b at the portion where the convex surface 31bc is located is defined as the distance H2. The relationship between the interval H1 and the interval H2 satisfies the following relational expression (1).

H1> H2 ・ ・ ・ ・ ・ (1)
That is, as shown in FIG. 8A, a part of the gap portion S1 is formed so that the gap becomes smaller toward the subject side in the optical axis X direction by the inclined surface 31ba formed on the outer peripheral surface 31b of the filtering 31. ing.

Further, the distance between the inner peripheral surface 30a of the lens hood 30 and the portion where the second holding portion 31bd is located is defined as the distance H3. The relationship between the interval H1 and the interval H3 satisfies the following relational expression (2).

H1 ≒ H3 ・ ・ ・ ・ ・ (2)
That is, the interval H1 and the interval H3 have almost the same size.

Here, it is assumed that the lens hood 30 is slid and moved from the storage position shown in FIG. 8A to the use position shown in FIG. 8B.

First, as the lens hood 30 moves, the sliding member 32a moves from the position where the distance between the lens hood 30 and the filtering 31 is the distance H1 to the position where the distance H2 is narrower than the distance H1. At this time, the sliding member 32a moves while abutting on the outer peripheral surface 31b of the filtering 31. Further, the sliding member 32a receives a compressive force in the radial direction of the sliding member 32a and moves while being deformed.

Then, when the lens hood 30 is further moved to the subject side, the sliding member 32a gets over the convex surface 31bc and fits into the second holding portion 31bd. That is, the lens hood 30 moves to the used position shown in FIG. 8B, and the sliding member 32a is held in a state of being fitted to the concave portion of the second holding portion 31bd.

As a result, the lens hood 30 is held at the use position shown in FIG. 8B. Further, since the interval H3 is larger than the interval H2, the user can recognize that the lens hood 30 has moved to the use position with a feeling of operation.

Further, the sliding member 32a is held in a gap H1 and a gap H3 having substantially the same size at the storage position shown in FIG. 8A and the use position shown in FIG. 8B. Therefore, the sliding member 32a can hold the lens hood 30 at the storage position shown in FIG. 8A and the usage position shown in FIG. 8B without receiving a large compressive force.

In the present embodiment, when the lens hood 30 is in the used position shown in FIG. 8B, the sliding member 32a and the convex portion 131bd constituting the second holding portion 31bd come into contact with each other. Then, the convex portion 130b constituting the holding portion 30b of the lens hood 30 and the convex portion 131bd of the filtering 31 do not come into contact with each other. As a result, the operation noise when moving the lens hood 30 to the use position can be reduced.

The sliding member 32b held by the holding portion 31be is in contact with the inner peripheral surface 30a of the lens hood 30 when the lens hood 30 slides back and forth in the X direction of the optical axis. The lens hood 30 is supported from the side.

3. 3. Effects, etc. As a comparative example, a structure in which the lens hood is held by a guide groove provided in the lens hood and an elastic protrusion provided in the ring can be mentioned. However, when shooting with a camera, the user may shoot while moving. In such a case, the lens barrel 10 may hit a peripheral object. In addition, the user may drop the camera when transporting the camera. As a result, the lens barrel 10 may be impacted in various directions such as a rotation direction with the optical axis X direction as a rotation axis and an optical axis X direction. In such a case, the configuration of the comparative example has a problem that the load is concentrated on the guide groove and the elastic protrusion. That is, the strength of the lens barrel of the comparative example and the camera against impact may be low.

On the other hand, in the present embodiment, the lens hood 30 is provided on the inner peripheral surface 30a side, and when the lens hood 30 moves from the storage position to the use position, the optical axis is in contact with the outer peripheral surface 31b of the filtering 31. A sliding member 32a that moves toward the subject in the X direction is provided. Further, in the present embodiment, at least a part of the gap S1 has an optical axis between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31 in a state where the lens hood 30 is in the storage position. The distance becomes narrower toward the subject in the X direction. That is, in the present embodiment, the lens hood 30 is held by the filtering 31 by compressing the sliding member 32a in the radial direction in the gap portion S1. Thereby, for example, even if an impact in the rotation direction with the optical axis X direction as the rotation axis or an impact in the optical axis X direction is applied, the stress load can be dispersed in the entire sliding member 32a. As a result, the strength of the lens barrel 10 can be improved. Further, it is not necessary to provide a guide groove, and the manufacturing cost can be reduced. Further, it is not necessary to provide elastic protrusions, and the number of parts can be reduced.

Further, in the present embodiment, an inclined surface 31ba is provided. As a result, the distance between the gaps S1 can be gradually narrowed from the image plane side in the optical axis X direction toward the subject side.

Further, in the present embodiment, a second holding portion 31bd as a recess is formed on the outer peripheral surface 31b of the filtering 31. The sliding member 32a fits into the second holding portion 31bd while the lens hood 30 is in the used position. Thereby, in the present embodiment, the position of the sliding member 32a in the used position is stabilized.

Further, in the present embodiment, the interval H1 and the interval H3 are substantially the same size. Thereby, in the present embodiment, the compressive force received by the sliding member 32a can be reduced in both the case where the lens hood 30 is in the storage position and the case where the lens hood 30 is in the use position. As a result, deterioration of the sliding member 32a over time can be suppressed.

Further, the interval H3 is larger than the interval H2. Therefore, when the lens hood 30 is moved from the storage position to the use position, the user can recognize that the lens hood 30 has reached the use position with a feeling of operation.

Further, in the present embodiment, a felt material is used as the material of the sliding member 32a and the sliding member 32b. Here, the felt material is excellent in wear resistance, durability, impact resistance and the like. Therefore, even when the lens hood 30 is repeatedly slid between the storage position and the use position, it is possible to prevent the sliding member 32a and the sliding member 32b from being worn, deformed, or damaged.

Further, by using a felt material as the material of the sliding member 32a and the sliding member 32b, a muffling effect that suppresses the operation noise generated when the lens hood 30 is slid between the storage position and the use position. Can also be obtained. Therefore, even when the metal lens hood 30 is slid and moved on the outer peripheral surface side of the metal filtering 31, it is possible to reduce the operation noise generated by the contact between the metal parts.

Here, when an animal such as an insect or a bird is the subject, the subject may escape even with a slight operation sound. By reducing the operation sound, it becomes easier to shoot various subjects.

Further, in the present embodiment, the lens hood 30 can be held by two members, the sliding member 32a and the sliding member 32b. Therefore, the rattling of the lens hood 30 can be suppressed, and the lens hood 30 can be stably held in the filtering 31.

4. Other Embodiments Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various changes can be made without departing from the gist of the disclosure.

(A)
In the above embodiment, the lens hood has a sliding member 32a and a sliding member 32b made of a felt material arranged between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31. An example of sliding the 30 with respect to the filtering 31 was given. However, the present disclosure is not limited to this.

For example, as shown in FIG. 9, the lens barrel 10 may have a configuration in which the rubber ring 33 is arranged at a position on the outer peripheral surface 31b of the filtering 31 opposite to the subject. The rubber ring 33 can further amplify the sound deadening effect when the lens hood 30 is moved.

(B)
In the above embodiment, an example in which two annular sliding members 32a and sliding members 32b are arranged between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31 has been given. However, the present disclosure is not limited to this.

For example, the number of sliding members provided between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31 may be one or three or more.

When the number of sliding members is one, it is preferable to use only the sliding members 32a of the above embodiment.

(C)
In the above embodiment, an example is given in which a sliding member 32a and a sliding member 32b made of the same felt material are arranged between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31. .. However, the present disclosure is not limited to this.

For example, the two sliding members may be made of different materials. Examples of materials other than felt material include rubber and sponge coated to improve slipperiness.

(D)
In the above embodiment, an example in which two annular sliding members 32a and sliding members 32b are arranged between the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31 has been given. However, the present disclosure is not limited to this.

For example, the shapes of the sliding member 32a and the sliding member 32b are not limited to an annular shape. The structure of the sliding member 32a and the sliding member 32b may be a structure in which a plurality of arc-shaped members are combined.

(E)
In the above embodiment, an example is given in which the gap portion S1 satisfying the conditional expression (1) and the conditional expression (2) is configured by the unevenness including the inclined surface 31ba provided on the outer peripheral surface 31b side of the filtering 31. However, the present disclosure is not limited to this.

For example, the inner peripheral surface 30a of the lens hood 30 facing the outer peripheral surface 31b of the filtering 31 may be provided with irregularities to form a gap portion S1 that satisfies the conditional expression (1) and the conditional expression (2).

Alternatively, the gap portion S1 satisfying the conditional expression (1) and the conditional expression (2) may be formed by the unevenness provided on both the inner peripheral surface 30a of the lens hood 30 and the outer peripheral surface 31b of the filtering 31.

(F)
Further, FIG. 10 shows a configuration in which the sliding member 32a comes into contact with the inclined surface 31ba in a state where the lens hood 30 is in the storage position as another embodiment. When a part of the sliding member 32a comes into contact with the inclined surface 31ba in this way, the rattling of the lens hood 30 at the storage position can be suppressed. By suppressing rattling, mechanical deterioration of the lens hood 30 and the filtering 31 can be suppressed, and a sound deadening effect can be obtained.

Here, in the form shown in FIG. 10, the width of the inclined surface 31ba in the optical axis X direction is defined as the width W1. Further, the width of the outer peripheral surface 31b of the region forming the convex surface 31bc in the optical axis X direction is defined as the width W2. The width W1 and the width W2 preferably satisfy the following conditional expression (3).

W1 <W2 ... (3)
That is, the width W1 is made smaller than the width W2, and the angle of the inclined surface 31ba with respect to the optical axis X direction is increased. As a result, an appropriate compressive force can be applied to the sliding member 32a. As a result, the lens hood 30 is stably held.

(G)
The advanced member of the present disclosure includes a filtering 31 and a group 1 unit 11. In the present embodiment, the filtering 31 and the 1st group unit 11 can be separated from each other, but as described above, the filtering 31 and the 1st group unit 11 may be integrally formed.

The lens barrel of the present disclosure can reduce the load on the strength surface. Therefore, it can be widely applied to a lens barrel mounted on the tip portion on the subject side in a state in which the lens hood can be extended.

10 Lens barrel 11 Group 1 unit (tip member)
11a Screw part 12 2 group unit 13 Cam frame 14 Fixed frame 15 3 group unit 16 4 group unit 17 5 group unit 18 Mount base 19 Exterior unit 20 Rear frame 21 Tripod seat 22 Tripod lock screw 30 Lens hood 30a Inner peripheral surface 30b Part 130b Convex part 230b Convex part 31 Filtering (tip member)
31a Inner peripheral surface 31aa Threaded portion 31b Outer peripheral surface 31ba Inclined surface 31bb First holding portion 31bc Convex surface 31bd Second holding portion (concave)
131b Convex part 31be Holding part 32a Sliding member (sliding member)
32b Sliding member 50 Camera body 100 Camera H1 to H3 Interval W1, W2 Width L1 to L18 Lens S1 Gap

Claims (8)

The tip member, which is located on the subject side in the optical axis direction and contains an optical system,
A lens hood that is attached to the tip member and moves in the optical axis direction between a predetermined storage position and a use position in a state of projecting from the storage position toward the subject.
It is provided on the inner peripheral surface side of the lens hood, and when the lens hood moves from the storage position to the use position, it moves toward the subject side in the optical axis direction in a state of being in contact with the outer peripheral surface of the tip member. The moving first sliding member and
A second sliding member attached to the outer peripheral surface side of the tip member and
A first convex portion that protrudes from the inner peripheral surface of the lens hood and holds the subject side of the first sliding member, and a first convex portion.
A second convex portion that protrudes from the outer peripheral surface of the tip member and holds the image plane side of the second sliding member.
With
At least in the used position, the lens hood is supported by the first sliding member and the second sliding member.
When the lens hood moves from the storage position to the use position toward the subject, the lens hood and the tip member do not come into contact with each other.
With the lens hood in the storage position, at least a part of the gap formed between the inner peripheral surface of the lens hood and the outer peripheral surface of the tip member is the subject in the optical axis direction. interval toward the side has become narrower,
When the lens hood is in the used position, the first convex portion and the second convex portion do not come into contact with each other.
Lens barrel. The distance between the first sliding member and the second sliding member in the optical axis direction when the lens hood is in the storage position is the distance between the first sliding member and the first sliding member in the state where the lens hood is in the used position. Longer than the optical axis spacing of the second sliding member,
The lens barrel according to claim 1 . The outer peripheral surface of the tip member has an inclined surface arranged obliquely with respect to the optical axis direction.
The part of the gap is formed between the inner peripheral surface of the lens hood and the inclined surface.
When the lens hood moves from the storage position to the subject side, when the first sliding member attached to the lens hood passes through the inclined surface, a compressive force is generated, while the lens hood is attached to the tip member. The compressive force of the second sliding member does not change.
The lens barrel according to claim 1 or 2 . A recess in which the second sliding member is arranged is formed on the outer peripheral surface of the tip member while the lens hood is in the used position.
The lens barrel according to any one of claims 1 to 3 . With the lens hood in the storage position
The distance between the inner peripheral surface of the lens hood and the surface of the recess facing the inner peripheral surface is set between the inner peripheral surface of the lens hood provided with the first sliding member and the second sliding. The size is substantially the same as the distance between the tip member provided with the member and the outer peripheral surface.
The lens barrel according to claim 4 . The material of the first sliding member and the second sliding member is a felt material, which covers substantially the entire circumference of the lens hood and the tip member.
The lens barrel according to any one of claims 1 to 5 . With the lens hood in the storage position, the first sliding member is in contact with the inclined surface.
The lens barrel according to claim 3 , or any one of claims 4 to 6 that cites claim 3 . The lens barrel according to any one of claims 1 to 7 .
A camera including a camera body to which the lens barrel is mounted.