JP5570098B2 - Lens barrel and camera - Google Patents

Description

  The present invention relates to a lens barrel and a camera.

A camera that can accommodate a lens barrel in a camera body when not photographing is known (see, for example, Patent Document 1).
JP-A-10-73753

In recent years, cameras tend to be smaller and thinner, and a lens barrel having a short dimension in the optical axis direction when stored is desired.
An object of the present invention is to provide a miniaturized lens barrel and camera.

The present invention, by the following such a solution, that solve the above problems.

The first aspect of the invention is the first cylinder, the accommodation position accommodated on the inner diameter side of the first cylinder, and the photographing position moved to the optical axis direction incidence side with respect to the first cylinder. And is supported by a second cylinder having first and second cam grooves formed on the inner peripheral surface, and a third cylinder that engages with the first cam groove, A first lens that moves in conjunction with the second cylinder, and a second lens that is supported by a member that engages with the second cam groove and moves in conjunction with the second cylinder; And a rectilinear guide portion provided on the inner diameter side of the first cylinder , and formed in an annular shape and supported by an end of the first cylinder on the emission side in the optical axis direction, and the second cylinder the provided protruding in the optical axis direction exit side from the end portion of the optical axis direction emission side, a protrusion part is formed of the second cam groove is formed in the rectilinear guide part the housing And a storage portion for storing the protruding portion in the location, the outer peripheral edge of the rectilinear guide part has a connection region which is tangent to the end of the first cylindrical body is formed by recessing the inner diameter side A first notch that forms a space between the first cylindrical body and the end , and at least a part of the first notch functions as the accommodating portion. This is a lens barrel.

The invention according to claim 2 is the lens barrel according to claim 1, wherein the rectilinear guide portion is formed with a second notch portion formed continuously with the first notch portion, The second cutout portion is a space portion formed such that a radial intermediate portion of the connection region is cut out along a circumferential direction, and the second cutout portion and the first cutout portion At least a part of the lens barrel functions as the housing portion in cooperation with each other.
A third aspect of the present invention is the lens barrel according to the first or second aspect, wherein the first cylindrical body includes a cam follower provided so as to protrude to the outer diameter side, and the linear guide portion. The cam follower has a position in the direction around the axis relative to the connection region in accordance with the relative rotation between the first cylindrical body and the rectilinear guide portion. The lens barrel is provided at a position where it can overlap.
A fourth aspect of the present invention is the lens barrel according to the third aspect, wherein the cam follower includes the linear guide portion and the first tube in a photographing state in which the second tubular body is disposed at a photographing position. When the body rotates relative to each other, the lens barrel moves in a region where a position in the direction around the axis overlaps the connection region.
A fifth aspect of the present invention is the lens barrel according to the third aspect, wherein the cam follower includes the linear guide portion and the first cylinder in a shooting state in which the second cylinder is disposed at a shooting position. The body moves between the first position and the second position when the body rotates relative to the body, and when the body is located at least one of the first position and the second position, In this lens barrel, the positions around the axis overlap.
A sixth aspect of the present invention is the lens barrel according to the third aspect, wherein the cam follower includes the linear guide portion and the first cylinder in a shooting state in which the second cylinder is disposed at a shooting position. When the body rotates relative to each other, the body moves between the first position and the second position, and when the body is located in at least one of the first position and the second position, The lens barrel characterized in that a position around the axis overlaps with a region in the vicinity of the boundary with the first notch .
The invention of claim 7 is a lens barrel according to any one of claims 1 to 6, have a image blur correcting unit that accommodates an image blur correction lens to correct image blur, the second The lens barrel is characterized in that the image blur correction unit and the rectilinear guide portion are arranged at positions where the second cylinder is in the photographing position and does not interfere with each other.
According to an eighth aspect of the present invention, there is provided an imaging in which the lens barrel according to any one of the first to seventh aspects and subject light that has passed through the lens provided in the lens barrel are exposed. And a camera.

  According to the present invention, a miniaturized lens barrel and camera can be provided.

Embodiments of a lens barrel and a camera to which the present invention is applied will be described below with reference to the drawings. In order to facilitate understanding, a coordinate system formed by the X axis, the Y axis, and the Z axis will be appropriately set in each drawing.
FIG. 1 is a cross-sectional view including the optical axis of the camera of the embodiment, and shows the accommodation position of the lens barrel.
FIG. 2 is a cross-sectional view of the lens barrel shown in FIG. 1 at the photographing position.
FIG. 3 is a development view showing an inner peripheral surface of a cam cylinder provided in the lens barrel shown in FIG.
4 is a view of the lens barrel shown in FIG. 1 as viewed from the optical axis direction emission side, where (a) shows the accommodation position of FIG. 1 and (b) shows the photographing position of FIG. .

The lens barrel 2 provided in the camera 1 is a collapsible lens barrel that is housed in the camera body 3 at the time of non-photographing and part of the lens barrel protrudes from the camera body 3 at the time of photographing.
The lens barrel 2 includes a first lens unit L1, a second lens unit L2, a CCD (Charge
(Coupled Device) A base 10, a fixed cylinder 20, an intermediate cylinder 30, a cam cylinder 40, a rectilinear guide cylinder 50, a rectilinear cylinder 60, an image blur correction unit 70, and a rectilinear guide section 80 are provided.

The first lens group L1 and the second lens group L2 are arranged in this order from the incident side (subject side) to the emission side (imaging unit side) along the optical axis A direction. The first lens group L1 and the second lens group L2 form a zoom lens having a two-group configuration. The first lens unit L1 functions as a focus lens, and the second lens unit L2 functions as an image blur correction lens.
The optical axes A of the first lens group L1 and the second lens group L2 are disposed below the central axis B of the intermediate cylinder 30 and the cam cylinder 40 described later at the normal photographing position of the camera 1. In this specification, the normal shooting position of the camera 1 refers to the posture of the camera 1 when shooting a horizontally long image with the optical axis A horizontal.

The CCD table 10 is a member that holds a CCD 11 and an LPF (Low-pass filter) 12.
The CCD 11 is disposed on the emission side of the second lens unit L2 and is fixed to the CCD table 10. The CCD 11 is an imaging unit of the camera 1 including a photoelectric conversion element that converts subject light that has passed through the first lens group L1 and the second lens group L2 into an electrical signal and outputs the electrical signal.
The LPF 12 prevents moiré from occurring in the subject image formed on the CCD 11. The LPF 12 is provided between the second lens unit L 2 and the CCD 11, and is fixed to the CCD table 10 like the CCD 11.

The fixed cylinder 20 is a cylinder arranged on the outermost diameter side among the plurality of cylinders forming the lens barrel 2. The fixed cylinder 20 is fixed to the camera body 3. The CCD table 10 is fixed to the end of the fixed cylinder 20 on the light axis A direction emission side. 1 and 2 show different cross sections of the fixed cylinder 20 for the sake of convenience in order to explain the configuration of the gear 21 and the straight guide groove 22 described below.
The fixed cylinder 20 includes a gear 21 as shown in FIG. The gear 21 is rotationally driven from a motor fixed to the CCD base 10 via a reduction gear train (the motor and the reduction gear train are not shown).
Further, as shown in FIG. 2, the fixed cylinder 20 includes a rectilinear guide groove 22 formed in the inner peripheral surface thereof so as to extend in the direction of the optical axis A. A projection 83a of a stopper ring 83, which will be described later, is inserted into the straight guide groove 22.

The intermediate cylinder 30 is a first cylinder inserted on the inner diameter side of the fixed cylinder 20. The intermediate cylinder 30 includes a gear 31 that meshes with the gear 21 described above on the outer peripheral surface portion on the emission side in the optical axis A direction. The intermediate cylinder 30 includes a cam follower 32 on the outer peripheral surface portion. The cam follower 32 is inserted into a cam groove 23 (see FIG. 2) formed in the inner peripheral surface portion of the fixed cylinder 20. The tip of the cam follower 32 is formed in a tapered shape.
The intermediate tube 30 has a fixing ring 33 fixed to the end portion on the emission side in the optical axis A direction (see FIG. 2). The fixing ring 33 is formed in an annular shape, and a rectilinear guide portion 80 described later is slidably attached to the inner diameter side thereof.

The cam cylinder 40 is a second cylinder inserted on the inner diameter side of the intermediate cylinder 30. The cam cylinder 40 rotates about the central axis B integrally with the intermediate cylinder 30.
On the outer diameter side of the cam cylinder 40, a guide portion 42 including a cam follower 41 inserted in a cam groove 34 (see FIG. 2) formed on the inner peripheral surface of the intermediate cylinder 30 is provided. The guide portion 42 is restricted from rotating around the central axis B, and moves straight in the direction of the optical axis A when the intermediate cylinder 30 rotates. The guide part 42 and the cam cylinder 40 are connected so as to be relatively rotatable about the central axis B. When the guide part 42 moves in the optical axis A direction, the cam cylinder 40 is interlocked with the optical axis A direction. And move in the direction of the optical axis A while rotating integrally with the intermediate cylinder 30.

  As shown in FIG. 3, the cam cylinder 40 has two systems of cam grooves 43 and 44 on its inner peripheral surface. One cam groove 43 is inserted with a cam follower 61 of a rectilinear cylinder 60 described later. A cam follower 71 provided in an image blur correction unit 70 described later is inserted into the other cam groove 44. Three of the cam grooves 43 and the cam grooves 44 are provided at substantially the same intervals along the circumferential direction of the cam cylinder.

  The cam profile of the cam groove 43 is formed in a substantially V shape that is open on the exit side in the optical axis A direction. The cam follower 61 inserted into the cam groove 43 is disposed on the light-emitting side in the optical axis A direction at the housing position HP of the lens barrel 2, and is at the optical axis A direction at the wide position W where the focal length of the zoom lens is the shortest. Arranged on the incident side. Further, the cam follower 61 is disposed on the light axis direction emission side with respect to the wide position W and on the light axis direction incident side with respect to the accommodation position HP at the tele position T where the focal length of the zoom lens is the longest. .

  On the other hand, the cam profile of the cam groove 44 is formed in a substantially V shape that opens to the incident side in the optical axis A direction. The cam follower 71 inserted into the cam groove 44 is disposed at the most incident side in the optical axis direction A at the tele position T, and is disposed at the most output side in the optical axis direction at the wide position W. Further, the cam follower 71 is arranged on the incident side HP in the optical axis A direction from the wide position W in the housing position HP of the lens barrel 2 and on the outgoing side in the optical axis A direction from the tele position T. Yes.

The cam barrel 40 includes a protruding portion 45 at the end on the exit side in the optical axis A direction.
The protrusion 45 is formed at the end of the cam tube 40 on the exit side in the optical axis A direction, for example, with three regions protruding from the exit side in the optical axis A direction. The three protrusions 45 are provided around the central axis B at substantially equal intervals. The cam cylinder 40 has a shorter dimension in the direction of the optical axis A in other areas than in the area where the protrusions 45 are provided.
The cam groove 44 is a boundary portion between an area in which the image blur correction unit 70 is driven between the housing position HP and the wide position W and an area in which the image blur correction unit 70 is driven between the wide position W and the tele position T (image blur correction unit). 70, and the boundary portion is formed in the projecting portion 45.

The rectilinear guide cylinder 50 is a cylinder inserted on the inner diameter side of the cam cylinder 40.
The rectilinear guide tube 50 includes a groove (not shown) into which a rectilinear key 82 provided in a rectilinear guide portion 80 described later is inserted, and rotation around the central axis B is restricted. The rectilinear guide cylinder 50 limits the rotation around the central axis B of the rectilinear cylinder 60 and the image blur correction unit 70 described later.

The rectilinear cylinder 60 is a cylinder inserted on the inner diameter side of the rectilinear guide cylinder 50, and is arranged on the most incident side at the photographing position of the camera 1 shown in FIG. 2 among a plurality of cylinders forming the lens barrel 2. Is done.
The rectilinear cylinder 60 includes a cam follower 61 on its outer peripheral surface. The cam follower 61 is inserted into the cam groove 43 formed in the cam cylinder 40 as described above. The rectilinear cylinder 60 is restricted from rotating around the central axis B by the rectilinear guide cylinder 50 and moves linearly in the direction of the optical axis A according to the rotation of the cam cylinder 40.

  On the inner diameter side of the rectilinear cylinder 60, the first lens unit L1 and the actuator 62 are accommodated. For example, the actuator 62 moves the first lens unit L1 in the direction of the optical axis A with respect to the rectilinear barrel 60 in accordance with a signal from a control unit (not shown) provided in the camera 1 during autofocus.

The image blur correction unit 70 forms an image on the CCD 11 by shifting the second lens group L2 in a plane orthogonal to the optical axis A in accordance with an output of a sensor (not shown) that detects a change in the posture of the camera 1. This is a known image blur correction device that performs image blur correction of a subject image.
The image blur correction unit 70 includes a cam follower 71 that is inserted into a cam groove 44 provided in the cam cylinder 40. The image blur correction unit 70 is limited in rotation around the central axis B by the straight guide tube 50 and moves straight in the direction of the optical axis A according to the rotation of the cam tube 40.

Next, the straight traveling guide unit 80 will be described.
The rectilinear guide portion 80 is a support portion that is formed in an annular shape and is supported by the end of the intermediate tube 30 on the light axis A direction exit side via the fixing ring 33. The rectilinear guide portion 80 is connected to the intermediate cylinder 30 so as to be relatively rotatable about the central axis B.
As shown in FIG. 4, the rectilinear guide portion 80 includes a base 81, a rectilinear key 82, a stopper ring 83, a first notch portion 84, and a second notch portion 85.

The base portion 81 is a portion that serves as a base of the rectilinear guide portion 80, and is formed in an annular shape that is disposed coaxially with the intermediate cylinder 30. Hereinafter, in the present specification, the terms “radial direction” and “circumferential direction” mean the radial direction and the circumferential direction of the base 81.
The rectilinear key 82 guides the rectilinear guide tube 50 rectilinearly, and is provided so as to protrude from the base 81 to the incident side in the optical axis A direction. For example, three rectilinear keys 82 are provided at substantially equal intervals around the central axis B.

  As shown in FIG. 2, the stopper ring 83 is provided on the light emitting side in the optical axis A direction of the base 81 and is fixed to the base 81 with screws. The stopper ring 83 includes a protrusion 83a that protrudes toward the outer diameter side. The protrusion 83 a is inserted into the rectilinear guide groove 22 formed in the fixed cylinder 20, and restricts the rotation of the rectilinear guide portion 80 around the central axis B.

The first cutout 84 is a portion formed by denting the outer peripheral edge of the base 81 toward the inner diameter side. The first notches 84 are provided at, for example, three locations at substantially equal intervals around the central axis B.
The outer peripheral edge portion of the rectilinear guide portion 80 is a non-connected region where the first notch portion 84 is provided and is not connected to the intermediate tube 30, and between the intermediate tube 30 and the rectilinear guide portion 80. Is formed with a space. On the other hand, a portion other than the region where the first notch portion 84 is formed in the linear guide portion 80 is connected to the intermediate cylinder 30. Hereinafter, the connection area connected to the intermediate cylinder 30 in the straight traveling guide portion 80 will be referred to as a connection portion 86 and will be described.

  The second cutout portion 85 is a space portion formed such that a radial intermediate portion of the connection portion 86 is cut out along the circumferential direction. The second notch 85 opens at one end of the connection portion 86 and is formed continuously with the first notch 84. The fact that the first notch 84 and the second notch 85 are formed continuously means that the first notch 84 and the second notch 85 are connected to each other. , Forming a single space.

  Here, in the lens barrel 2, the protrusion 45 provided on the cam barrel 40 is part of the first notch 84 and the second notch 85 at the housing position shown in FIGS. 1 and 4A. Is to be housed. Hereinafter, a portion (a part of the first notch portion 84 and the second notch portion 85) that accommodates the protruding portion 45 at the accommodation position of the lens barrel 2 will be referred to as an accommodating portion 87.

Next, the positional relationship between the cam follower 32 provided in the intermediate cylinder 30 and the connecting portion 86 will be described.
The intermediate cylinder 30 rotates the cam cylinder 40 by the rotation around the central axis B, and the zoom lens formed by the first lens group L1 and the second lens group L2 has a wide position and a telephoto position by the rotation of the cam cylinder 40. Move between positions.

The moving range when the cam follower 32 moves between the wide position and the tele position is in a region overlapping with the connecting portion 86 in the radial direction (indicated by reference numeral C in FIG. 4B). . In this region C, the position of the cam follower 32 around the central axis B overlaps the position of the connecting portion 86 around the central axis B.
For example, at the wide position of the zoom lens shown in FIG. 4B, the position of the cam follower 32 overlaps the connecting portion 86 in the radial direction. Further, when the zoom lens is driven to the tele position from this wide position, the cam follower 32 rotates around the central axis B with respect to the connection portion 86, but the cam follower 32 has a diameter that is the same as that of the connection portion 86 even at the tele position. It is provided so as to overlap in the direction (the position of the cam follower at the tele position is not shown).

Next, the operation of the lens barrel 2 will be described.
In the camera 1, when a power switch (not shown) is turned on by a user such as a photographer, the gear 21 rotates and the intermediate cylinder 30 rotates around the central axis B. The intermediate cylinder 30 is guided to a cam groove 23 formed in the fixed cylinder 20 and is drawn out to the incident side in the optical axis A direction.

When the intermediate cylinder 30 is drawn out to the incident side in the optical axis A direction, the rectilinear guide part 80 also moves linearly in the optical axis A direction along with this.
Further, the cam cylinder 40 is rotated with the rotation of the intermediate cylinder 30, and the cam cylinder 40 is guided to the cam groove 34 formed in the intermediate cylinder 30 and is drawn out to the incident side in the optical axis A direction.

When the cam cylinder 40 rotates about the central axis B, the linear movement cylinder 60 and the image blur correction unit 70 are linearly moved to the incident side in the optical axis A direction by being guided by cam grooves 43 and 44 formed in the cam cylinder 40. . As a result, the camera 1 is at the photographing position (wide position W) shown in FIGS. 2 and 4B.
When the power switch is turned off by the user from this photographing position, the gear 21 rotates in the reverse direction, and each cylinder moves to the optical axis A direction emission side, contrary to the above case, and FIGS. The accommodation position shown in a) is obtained.

Here, when the lens barrel 2 is in the housing position shown in FIG. 4A, the protruding portion 45 provided on the cam barrel 40 is housed in the housing portion 87 formed in the rectilinear guide portion 80.
Further, when the cam barrel 40 moves from the storage position to the photographing position, the cam barrel 40 is rotated around the optical axis B while being fed to the incident side in the optical axis A direction, and the protrusion 45 is detached from the storage portion 87 accordingly. To do.

Hereinafter, effects of the lens barrel 2 of the embodiment will be described.
In order to improve the blur correction performance of the image blur correction lens (second lens unit L2), it is preferable that the movable range of the image blur correction lens in the direction perpendicular to the optical axis is larger. Therefore, the base 81 of the rectilinear guide portion 80 to which the rectilinear key 82 is attached does not interfere with the image blur correction unit 70 in a state where the lens barrel is at the photographing position (between the wide end and the tele end of the zoom lens). It is desirable to be in position. Therefore, in the embodiment, the base 81 of the rectilinear guide portion 80 is disposed on the light exit side in the optical axis A direction of the intermediate tube 30 so that the above-described interference does not occur.

  However, if the base part 81 of the straight guide part 80 is simply arranged on the exit side in the optical axis A direction of the intermediate cylinder 30, the length of the lens barrel in the optical axis direction at the storage position becomes longer by the dimension of the base part 81. End up. In order to prevent this, in the embodiment, the dimension of the cam barrel 40 in the optical axis A direction is further shortened.

However, as shown in FIG. 3, the dimension of the cam barrel 40 cannot be shortened at a portion where the moving direction of the image blur correction unit 70 in the cam groove 44 is reversed. Therefore, in the embodiment, the protruding portion 45 is provided at the boundary portion. A first notch portion 84 and a second notch portion 85 are formed so that the protruding portion 45 does not interfere with the base portion 81 of the rectilinear guide portion 80 at the storage position.
Since the above-described configuration is adopted, the apparatus according to the present embodiment can achieve high blur correction performance and a lens barrel that is thin in the optical axis direction.

The effects of the lens barrel 2 of this embodiment will be described in comparison with the lens barrel of the comparative embodiment.
The cam cylinder 140 (the cam cylinder 140 of the comparative form is indicated by a one-dot chain line in FIG. 3) provided in the lens barrel of the comparative form includes cam grooves 43 and 44 similar to the cam cylinder 40 of the embodiment. There is no equivalent of the protrusion 45 provided in the cam cylinder 40 of the embodiment, and the length in the optical axis A direction is constant. Therefore, the cam barrel 140 according to this comparative example is entirely disposed closer to the incident side in the optical axis A direction than the rectilinear guide portion 80 at the lens barrel housing position.

  In contrast, in the lens barrel 2 of the embodiment, the protruding portion 45 is accommodated in the accommodating portion 87 at the accommodating position. In this state, the position of the cam barrel 40 in the optical axis A direction overlaps with a part of the cam barrel 40 (projecting portion 45) and the rectilinear guide portion 80. Compared with the lens barrel, the projection length of the protrusion 45 can be shortened.

  In addition, the projecting portion 45 has been described as projecting from the end of the cam tube 40 on the exit side in the optical axis A direction. It can also be described as being formed to be recessed on the incident side in the axis A direction. In the lens barrel 2 of the embodiment, since the protrusion 45 is formed by denting the region where the cam groove 44 is not provided, it is possible to reduce the size while securing the function of the cam barrel 40.

Moreover, according to the lens barrel 2 of the embodiment, the following effects can be obtained.
The lens barrel 2 at the photographing position has a possibility that an impact is applied in the direction of the optical axis A because the rectilinear barrel 60 and the like protrude from the camera body 3 to the incident side. The cam follower 32 provided in the intermediate cylinder 30 is pressed against the cam groove 23 when an impact in the optical axis A direction is applied to the lens barrel 2. Since the tip of the cam follower 32 is formed in a tapered shape, when the cam follower 32 is pressed in the direction of the optical axis A by the cam groove 23, the intermediate cylinder 30 tends to be deformed radially inward by the component force. .

  On the other hand, as shown in FIG. 4B, in the lens barrel 2 of the present embodiment, the cam follower 32 and the connecting portion 86 of the linear guide 80 overlap in the radial direction at the photographing position. Therefore, a force for deforming the intermediate cylinder 30 inward in the radial direction is transmitted to the base portion 81 via the connection portion 86. Here, since the base 81 is formed in an annular shape, it functions as a stiffening member against the pressing force from the radial direction, and the radial rigidity of the intermediate cylinder 30 is improved. Thereby, the deformation of the intermediate cylinder 30 is prevented.

[Deformation]
The configurations of the lens barrel and the camera of the present invention are not limited to the above-described embodiments, and various modifications and changes as shown below are possible as appropriate, and these are also within the technical scope of the present invention. included.
(1) Although the support part of embodiment was a rectilinear guide part which guides other cylinders linearly, if a support part is provided in the inner diameter side of the 1st cylinder, it will not be restricted to this, It does not have to have such a function. Moreover, although the 2nd cylinder was a cam cylinder provided with the cam groove, the function of this 2nd cylinder is not specifically limited.
(2) In the embodiment, the cam follower is provided so that the connection portion and the circumferential position overlap at both the wide position and the tele position. However, the present invention is not limited to this, and one position (for example, from the camera body) A cam follower may be provided so as to overlap the connecting portion only at the tele position where the protruding amount is large.
(3) The lens barrel does not have to overlap the connecting portion in the radial direction as long as the cam follower is located in the vicinity of the boundary between the connecting portion and the non-connecting portion at the photographing position. An effect substantially the same as that of the form (improvement of rigidity of the first cylinder) can be obtained.
(4) The lens barrel of the embodiment is a retractable lens barrel that is accommodated in the camera body when not photographing, but the type of the lens barrel is not limited to this, and can be attached to and detached from the camera body, for example. An interchangeable lens barrel may be used.

It is sectional drawing which shows the camera provided with the lens-barrel of embodiment, and has shown the accommodation position. It is sectional drawing which shows the camera provided with the lens-barrel of embodiment, and has shown the imaging | photography position. FIG. 2 is a development view showing an inner peripheral surface of a cam cylinder provided in the lens barrel shown in FIG. 1. It is a figure which shows the rectilinear guide part with which the lens barrel shown in FIG. 1 was equipped.

Explanation of symbols

  1 Camera: 2 Lens barrel: 30 Intermediate cylinder: 32 Cam follower: 40 Cam cylinder: 45 Protruding part: 80 Linear guide part: 87 Storage part

Claims (8)

A first cylinder;
It is movable between an accommodation position accommodated on the inner diameter side of the first cylindrical body and an imaging position moved to the incident side in the optical axis direction with respect to the first cylindrical body, and the first is located on the inner peripheral surface . And a second cylinder having a second cam groove formed thereon,
A first lens supported by a third cylinder engaged with the first cam groove and moving in conjunction with the second cylinder;
A second lens supported by a member engaged with the second cam groove and moving in conjunction with the second cylinder;
A rectilinear guide portion formed in an annular shape and supported by an end portion on the light axis direction emission side of the first cylinder, and provided on the inner diameter side of the first cylinder;
A projecting portion provided to project from the end of the second cylindrical body on the exit side in the optical axis direction to the exit side in the optical axis direction, and forming a part of the second cam groove;
An accommodating portion that is formed in the rectilinear guide portion and accommodates the protruding portion at the accommodating position;
The outer peripheral edge of the rectilinear guide part has a connection region which is tangent to the end of the first cylindrical body is formed by recessing the inner diameter side between said end portion of said first cylindrical body A first notch that forms a space ,
At least a part of the first cutout portion functions as the housing portion. The lens barrel according to claim 1,
The straight guide portion is formed with a second cutout portion formed continuously with the first cutout portion,
The second cutout portion is a space portion formed such that a radial intermediate portion of the connection region is cut out along the circumferential direction,
The lens barrel, wherein the second cutout portion and the at least part of the first cutout portion function as the housing portion in cooperation with each other. The lens barrel according to claim 1 or 2, wherein
The first cylindrical body is provided with a cam follower that protrudes toward the outer diameter side, and is provided so as to be relatively rotatable around a predetermined axis with respect to the rectilinear guide portion.
The cam follower is provided at a position where a position around the axis can overlap with the connection region in accordance with relative rotation between the first cylindrical body and the rectilinear guide portion. A lens barrel. The lens barrel according to claim 3,
The cam follower is arranged in a direction around the axis with respect to the connection region when the rectilinear guide portion and the first cylinder rotate relative to each other in a shooting state in which the second cylinder is disposed at a shooting position. A lens barrel that moves within an overlapping region. The lens barrel according to claim 3,
The cam follower has a first position and a second position when the rectilinear guide portion and the first cylinder rotate relative to each other in a shooting state in which the second cylinder is arranged at a shooting position. The lens barrel is characterized in that the position in the direction around the axis overlaps with the connection area when moving between the first position and the second position. The lens barrel according to claim 3,
The cam follower has a first position and a second position when the rectilinear guide portion and the first cylinder rotate relative to each other in a shooting state in which the second cylinder is arranged at a shooting position. Between the first region and the second region, the region around the boundary between the connection region and the first notch is located in a direction around the axis when moving between the first region and the second region. A lens barrel characterized by overlapping positions. The lens barrel according to any one of claims 1 to 6,
Have a image blur correcting unit that accommodates an image blur correction lens for correcting image blurring,
The lens barrel, wherein the image blur correction unit and the rectilinear guide portion are arranged at positions where the second cylinder is in a photographing position and does not interfere with each other. The lens barrel according to any one of claims 1 to 7,
An imaging unit that exposes subject light that has passed through the lens provided in the lens barrel.

Images