JP2019148696A - Lens hood and connection structure between lens hood and lens barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens hood capable of eliminating rotation backlash without performing time-consuming adjustment work, and to provide a connection structure between a lens hood and a lens barrel. SOLUTION: A lens hood and a lens are detachably connected to a lens hood having a hood-side connection structure formed at an imaging side end and a lens barrel having a lens-side connecting structure formed at a subject-side end. In the connection structure with the lens barrel, the lens barrel has flanges 42a and 42b extending in the circumferential direction on the outer surface, and the lens hood is formed on the inner surface of the lens hood in the circumferential direction in which the flanges 42a and 42b can be accommodated. It has first and second groove portions 34a and 34b extending, and a lock piece 10 and a hood lock button 6 for restraining both ends of the flanges 42a and 42b in the circumferential direction, respectively, and the lock piece 10 has a hood lock button for the flange 42a. It is configured to urge the lens in the circumferential direction toward No. 6 [Selection diagram] Fig. 8

Description

  The present invention relates to a lens hood and a connection structure between the lens hood and a lens barrel.

  Conventionally, a lens hood is attached to the tip of a lens barrel so that unnecessary light does not enter the optical system. Such lens hoods have a so-called flower shape in which the four sides of the object side edge protrude toward the object side in order to block light from a specific angle. The flower-shaped lens hood cannot block unnecessary light unless it is attached to the lens barrel at a predetermined angle so that the protruding portion is positioned vertically and horizontally. End up. Therefore, for example, as described in Patent Document 1, a lens barrel side fitting portion including one of a convex portion and a concave portion is provided on the outer peripheral surface of the lens barrel, and the convex portion and the inner peripheral side of the lens hood are provided. A bayonet structure connection structure is known in which a hood-side fitting portion that is the other of the recesses is provided. According to the connection structure of the bayonet structure, when the lens barrel side fitting portion and the hood side fitting portion are fitted, a click feeling is generated when the convex portion enters the concave portion. It can be confirmed that the lens barrel is attached at an angular position.

  As a connection structure between another lens hood and the lens barrel, a hood having a lock button for preventing the hood from being detached is used. Specifically, a flange portion that extends in the circumferential direction is provided on the outer surface of the subject side end of the lens barrel, a groove portion is formed on the inner surface of the end portion on the imaging side of the hood, and radially inward in the groove portion. And a lock button capable of projecting in the groove is provided. The flange portion is inserted into the groove portion, and one end in the circumferential direction of the flange portion is brought into contact with the diameter stop portion, and a lock button is brought into contact with the other end in the circumferential direction of the flange portion, whereby the lens hood is attached to the lens mirror. Can be connected to a tube.

JP 2017-44835 A

  However, when a hood having a lock button is used, the lens hood must have a certain amount of rotational play with respect to the lens barrel so that the lock button is securely closed. For this reason, the lens hood sways with respect to the lens barrel during use, and a collision sound is generated. In addition, it is possible to reduce the rotation play by adjusting the circumferential interval between the diameter stop and the lock button, but adjustment work is required to actually check and correct the rotation play by creating a lens hood. Takes time.

  The present invention has been made in view of the above problems, and its purpose is to provide a lens hood that can eliminate rotating backlash without performing laborious adjustment work, and a connection between the lens hood and the lens barrel. Is to provide a structure.

  The lens hood of the present invention is a lens hood attached to a lens barrel in which a flange portion extending in the circumferential direction is formed on the outer surface of the subject side end portion. The lens hood is formed on the inner surface of the lens hood and can accommodate the flange portion. A groove portion extending in the circumferential direction and a pair of end portion restraining mechanisms that restrain both ends of the flange portion in the circumferential direction, and one end restraining mechanism of the pair of end portion restraining mechanisms It is comprised so that it may urge in the circumferential direction toward this edge part restraint mechanism.

  The connection structure between the lens hood and the lens barrel of the present invention is a connection structure between the lens hood and the lens barrel for detachably connecting the lens hood to the subject side end of the lens barrel. The lens barrel has a flange portion extending in the circumferential direction on the outer surface, and the lens hood is formed on the inner surface of the lens hood, and has a groove portion extending in the circumferential direction capable of accommodating the flange portion, and both ends in the circumferential direction of the flange portion. A pair of end portion restraining mechanisms that restrain each other, and one end restraining mechanism of the pair of end portion restraining mechanisms urges the flange portion in the circumferential direction toward the other end restraining mechanism. It is comprised in that.

  ADVANTAGE OF THE INVENTION According to this invention, the connection structure of the lens hood which can eliminate rotation backlash, and a lens hood and a lens-barrel can be provided, without performing a troublesome adjustment operation.

It is the perspective view seen from the to-be-photographed object side of the lens hood used for the attachment or detachment structure of the lens hood and lens barrel by one Embodiment of this invention. It is the disassembled perspective view seen from the to-be-photographed object side of the lens hood shown in FIG. It is the disassembled perspective view seen from the image formation side of the lens hood shown in FIG. It is the cross-sectional perspective view seen from the image formation side of the lens hood shown in FIG. It is an expanded sectional perspective view of the V section in FIG. It is sectional drawing seen from the image formation side of the lens hood shown in FIG. It is a perspective view which shows the connection member of the lens barrel used for the attachment or detachment structure of the lens hood and lens barrel by one Embodiment of this invention. FIG. 8 is a cross-sectional view of the lens hood and the connecting member of the lens barrel in a state where the lens hood shown in FIG. 1 is attached to the connecting member of the lens barrel shown in FIG. 7.

  Hereinafter, an embodiment of a lens hood of the present invention and a connection structure between the lens hood and a lens barrel will be described with reference to the drawings.

〔Lens hood〕
FIG. 1 is a perspective view of a lens hood used in an attachment / detachment structure between a lens hood and a lens barrel according to an embodiment of the present invention, as viewed from the subject side. FIG. 2 is an exploded perspective view of the lens hood shown in FIG. 1 as viewed from the subject side. FIG. 3 is an exploded perspective view of the lens hood shown in FIG. 1 as viewed from the image forming side. 4 is a cross-sectional perspective view of the lens hood shown in FIG. 1 as viewed from the imaging side. FIG. 5 is an enlarged cross-sectional perspective view of a portion V in FIG. 6 is a cross-sectional view of the lens hood shown in FIG. 1 as viewed from the imaging side.

As shown in FIGS. 1 to 3, the lens hood 1 includes a hood main body 2, a hood cosmetic ring 4 attached to the imaging side of the hood main body 2, a hood lock button 6, a lock spring 8, and a lock piece 10. , A leaf spring 12 and a fixing screw 14 are provided.
The hood main body 2 is formed with a plurality (five in the present embodiment) of through holes 2a penetrating in the optical axis direction at intervals in the circumferential direction. Further, a screw hole 4 a is formed in the hood decorative ring 4 at a position corresponding to the through hole 2 a of the hood body 2. With the hood lock button 6, the lock spring 8, the lock piece 10, and the leaf spring 12 disposed at predetermined positions of the hood main body 2, the hood decorative ring 4 is brought into contact with the imaging side of the hood main body 2. The lens hood 1 is assembled integrally by inserting the fixing screw 14 through the through hole 2a of the hood body 2 and screwing it into the screw hole 4a of the hood decorative ring 4. Note that the screwing between the fixing screw 14 and the screw hole 4a is not particularly limited. For example, the fixing screw 14 may be screwed into the screw hole 4a in which a thread is formed in advance, or a bag hole is simply formed. The fixing screw 14 may be screwed into the formed screw hole 4a while making a screw thread with a tap tight screw.

As shown in FIGS. 1 to 6, the hood main body 2 is connected to the outer cylinder part 16, the inner cylinder part 18 disposed inside the outer cylinder part 16, and the outer cylinder part 16 and the inner cylinder part 18. And a connection unit 20.
The outer cylinder part 16 is cylindrical as a whole, and has a vertically extending part 16a positioned up and down in the attached state and a horizontally extending part 16b positioned right and left. The vertically extending portion 16a and the horizontally extending portion 16b extend to the subject side. In particular, the vertically extending portion 16a extends to the subject side with respect to the left and right extending portion 16b. A plurality of convex portions extending in the circumferential direction are formed at equal intervals on the inner peripheral surfaces of the vertically extending portion 16a and the horizontally extending portion 16b. Further, a cutout portion 16c (FIG. 3) is formed at a position where the operation portion 6a of the hood lock button 6 on the image forming side edge of the outer cylinder portion 16 is disposed.

  The connecting portion 20 has an annular shape when viewed in the optical axis direction, and is inclined so as to advance toward the image forming side inward in the radial direction. The outer end edge of the connection portion 20 is connected to the intermediate portion of the outer cylinder portion 16, and the inner end edge of the connection portion 20 is connected to the subject side edge of the inner cylinder portion 18. The through hole 2 a is formed in the connection portion 20. An accommodation hole (not shown) for rotatably accommodating the shaft portion 6d is formed at a position corresponding to the shaft portion 6d of the hood lock button 6 of the connecting portion 20.

  The inner cylinder portion 18 has a cylindrical shape, and is arranged so that its central axis coincides with the central axis of the outer cylinder portion 16. Further, a cutout portion 18 a is formed at a location corresponding to the lock portion 6 b of the hood lock button 6 of the inner cylinder portion 18. Further, an opening 18b is formed at a location corresponding to the lock piece 10 of the inner cylinder portion 18. A pair of parallel guide portions 17 extending outward in the radial direction are formed on both sides in the circumferential direction of the opening 18b. In addition, a pair of columnar protrusions 19 extending from the connection portion 20 to the image forming side are formed outside the pair of guide portions 17 in the radial direction.

  Formed on the inner surface of the inner cylinder portion 18 is a first protrusion 30 that extends in the circumferential direction over substantially the entire circumference and is divided into a plurality of portions. A pair of second protrusions 32 are formed on the image forming side of the first protrusions 30 at a predetermined interval in the optical axis direction. The pair of second protrusions 32 extend in a range of approximately 90 degrees in the circumferential direction at positions facing each other across the optical axis. Between the 1st protrusion 30 and the 2nd protrusion 32, the 1st and 2nd groove parts 34a and 34b are formed. At one end portion in the circumferential direction of the second groove portion 34b, a diameter stop portion 36 (FIGS. 3 and 6) extending from the end portion of the second protrusion 32 to the first protrusion 30 is formed.

  The hood decorative ring 4 includes a truncated cone-shaped annular inclined surface 22, and an outer cylinder 24 and an inner cylinder 26 extending from the annular inclined surface 22 toward the subject side. A first cutout portion 28 is formed at a position where the operation portion 6 a of the hood lock button 6 of the annular inclined surface 22 and the outer cylindrical body 24 is disposed. Further, a first cutout portion 26 a is formed in a portion corresponding to the hood lock button 6 of the inner cylindrical body 26. Further, second cutout portions 24b and 26b are formed at locations corresponding to the lock piece 10 of the outer cylinder body 24 and the inner cylinder body 26, respectively. An accommodation hole 22a (FIG. 4) for rotatably accommodating the shaft portion 6d is formed at a position corresponding to the shaft portion 6d of the hood lock button 6 of the hood decorative ring 4. In the hood decorative ring 4, the outer cylindrical body 24 is disposed radially inside the outer cylindrical portion 16 of the hood main body 2, and the inner cylindrical body 26 is disposed radially outward of the inner cylindrical portion 18 of the hood main body 2. The hood body 2 is fixed.

  The hood lock button 6 includes an arc-shaped arm portion 6c, an operation portion 6a attached to one end of the arm portion 6c in the radial direction, and a lock attached to the other end of the arm portion 6c in the radial direction. A portion 6b, and a shaft portion 6d provided at the center of the arm portion 6c so as to protrude on both sides in the optical axis direction. In a state where the lens hood 1 is assembled, the subject-side shaft portion 6 d is inserted into the housing hole 22 a of the hood body 2, and the imaging-side shaft portion 6 d is housed in the housing hole 22 a of the hood decorative ring 4. . Accordingly, the hood lock button 6 can be rotated around the shaft portion 6d. In the state where the lens hood 1 is assembled, the operation portion 6 a protrudes outward through the notch portion 16 c of the hood body 2 and the first notch portion 28 of the hood decorative ring 4. Further, the lock portion 6b of the hood lock button 6 passes through the cutout portion 18a of the hood main body 2 and the first cutout portion 26a of the hood decorative ring 4 and radially extends to one end portion of the first groove portion 34a. Protrusively inward. In addition, an inclined surface 6b1 (FIGS. 4 and 6) is formed at a portion of the distal end portion of the lock portion 6b opposite to the first groove portion 34a. The inclined surface 6b1 is inclined toward the first groove 34a inward in the radial direction. The contact surface 6b2 (the surface on the first groove 34a side) opposite to the inclined surface 6b1 at the tip of the lock portion 6b extends in the radial direction.

  The lock spring 8 has a central portion 8c formed by winding a metal thin wire in a coil shape, and first and second arm portions 8a and 8b extending laterally from the central portion. In the lock spring 8, the shaft portion 6d of the hood lock button 6 is inserted into the center portion 8c, the first arm portion 8a abuts against the radially inner surface side of the operation portion 6a of the hood lock button 6, and the second arm portion 8b. Is fixed to the hood body 2. As a result, the hood lock button 6 is urged by the lock spring 8 so that the operation portion 6 a is positioned radially outward and the lock portion 6 b protrudes radially inward of the lens hood 1. Then, by pressing the operation portion 6a radially inward against the urging force of the lock spring 8, the lock portion 6b can be retracted radially outward. As will be described later, the hood lock button 6 and the lock spring 8 function as an end restraint mechanism that restrains one end of the flange 42a.

  As shown in FIG. 5, the lock piece 10 includes a base 10b having a substantially rectangular cross section, and a tip 10a having a pair of inclined surfaces 10a1 formed on both sides in the circumferential direction so as to become narrower toward the tip. Have. The width of the base portion 10b is larger than the width of the tip portion 10a. A concave portion 10c extending in the optical axis direction is formed outside the base portion 10b in the radial direction. The lock piece 10 is arranged so that the tip end portion 10a is inserted through the opening 18b and the pair of guide portions 17 are in contact with both side portions of the base portion 10b. Thereby, the lock | rock top 10 is guided by the guide part 17, and can move to a radial direction. Further, the edge portions 18 c located on both sides of the opening 18 b (FIG. 3) of the inner cylinder portion 18 of the hood body 2 extend from the guide portion 17 to the lock piece 10 side. Accordingly, when the radially inner surface of the base portion 10b comes into contact with the edge portion 18c of the inner cylinder portion 18 of the hood body 2, the lock piece 10 is moved so that the lock piece 10 does not move inward in the radial direction any more. To regulate. In addition, in the state where the edge 18c of the inner cylindrical portion 18 of the hood main body 2 is in contact with the radially inner surface of the base portion 10b, only the portion where the inclined surfaces 10a1 are formed on both sides of the distal end portion 10a is the inner cylindrical portion 18. Projects inward from the inner surface. The inclined surface 10a1 formed at the distal end portion 10a is inclined so as to spread outward in the circumferential direction toward the radially outer side of the lens hood 1. The lock piece 10 is disposed at a position opposite to the diameter stop portion 36 formed at the end portion of the second groove portion 34b of the hood body 2 with the central axis interposed therebetween.

  The leaf spring 12 includes a substantially V-shaped projecting portion 12a, an arm portion 12b extending laterally from both sides of the projecting portion 12a, and a bent portion that is formed on the side of the arm portion 12b and is bent outward in the radial direction. 12c. The leaf spring 12 is disposed radially outward of the lock piece 10 so that the pair of bent portions 12c engage with the protrusions 19 and the protruding portion 12a is positioned radially inward. The protruding portion 12 a of the leaf spring 12 is located in the recessed portion 10 c of the base portion 10 b of the lock piece 10. Accordingly, the lock piece 10 is urged inward in the radial direction by the leaf spring 12 so as to protrude from the other end of the first groove 34a. As will be described later, the lock piece 10 and the leaf spring 12 function as an end portion restraining mechanism for restraining one end portion of the flange 42a.

[Lens barrel]
FIG. 7 is a perspective view showing a connecting member of a lens barrel used in a structure for attaching and detaching a lens hood and a lens barrel according to an embodiment of the present invention.
The lens barrel has a connection member 40 fixed to the subject side end of the lens barrel. As shown in FIG. 7, the connection member 40 includes an annular base 40A connected to a cylinder located on the subject side of the lens barrel, and a cylindrical connection portion 40B extending from the base 40A toward the subject. Prepare.

  A pair of flanges 42a and 42b projecting outward in the radial direction and extending in the circumferential direction are formed on the outer peripheral surface of the connecting portion 40B. The pair of flanges 42a and 42b are located on opposite sides of the central axis. The circumferential angular width of the pair of flanges 42a and 42b is the circumferential angular width between the end portion of the inclined surface 10a1 of the lock piece 10 on the base 10b side and the contact surface 6b2 of the lock portion 6b of the hood lock button 6. And slightly shorter than the circumferential angular width between the tip end of the inclined surface 10 a 1 of the lock piece 10 and the contact surface 6 b 2 of the lock portion 6 b of the hood lock button 6. Hereinafter, for the sake of explanation, a portion between adjacent flanges 42a and 42b is referred to as a notch portion 42A.

[Removal of lens hood]
Hereinafter, a method for detachably attaching the lens hood to the lens barrel will be described. FIG. 8 is a cross-sectional view of the lens hood and the connecting member of the lens barrel in a state where the lens hood shown in FIG. 1 is attached to the connecting member of the lens barrel shown in FIG.
First, the lens hood 1 is arranged so that the second protrusion 32 faces the notch 42A of the connecting member 40 of the lens barrel. Then, the lens hood 1 is moved toward the lens barrel until the flanges 42 a and 42 b of the lens barrel connecting member 40 abut on the first protrusion 30 of the lens hood 1.

  Next, the lens hood 1 is rotated in the direction of the arrow in FIG. 8 with respect to the lens barrel. When the lens hood 1 is rotated, the end of the flange 42 comes into contact with the inclined surface 6 b 1 of the lock portion 6 b of the hood lock button 6. Thus, when the lens hood 1 is further rotated in a state where the flange 42 is in contact with the inclined surface 6b1 of the lock portion 6b, one flange 42a moves the lock portion 6b in the radial direction against the urging force of the lock spring 8. Pushing outward, the pair of flanges 42 enters the first and second grooves 34a, 34b.

  Further, when the lens hood 1 is rotated, the end of the one flange 42 a in the rotational advance direction comes into contact with the inclined surface 10 a 1 of the lock piece 10. In this way, the end of one flange 42a is in contact with the inclined surface 10a1 of the lock piece 10, and the end of the other flange 42b is the diameter stop of the end of the second groove 34b of the lens hood 1. The lens hood 1 is rotated until it abuts on the portion 36. As a result, the lock piece 10 retreats radially outward against the urging force of the leaf spring 12. And if the edge part of the other flange 42b contact | abuts to the diameter stop part 36, a user will open | release the rotational force added to the lens hood 1. FIG.

  When the rotational force applied to the lens hood 1 by the user is released, the lock piece 10 is urged radially inward by the leaf spring 12, so that one end of one flange 42a has an inclined surface 10a1 of the lock piece 10. Thus, the urging force is applied in the circumferential direction toward the hood lock button 6. Thereby, the lens hood 1 rotates toward the hood lock button 6 until the other end of the one flange 42a contacts the contact surface 6b2 of the lock portion 6b of the hood lock button 6. Then, both ends of one flange 42 are sandwiched between the contact surface 6b2 of the lock portion 6b and the inclined surface 10a1 of the lock piece 10.

  In such a state, the flange 42 is sandwiched between the first protrusion 30 and the second protrusion 30 and movement of the lens hood 1 in the optical axis direction with respect to the lens barrel is restricted. Further, since both ends of one flange 42 are sandwiched between the lock portion 6b and the lock piece 10, the rotational movement of the lens hood 1 relative to the lens barrel is restricted.

  As described above, according to the present embodiment, since the lock piece 10 is urged radially inward by the leaf spring 12, one end of one flange 42a is formed by the inclined surface 10a1 of the lock piece 10 so that the hood It is urged in the circumferential direction toward the lock button 6. As a result, both ends in the circumferential direction of one flange 42a abut against the lock piece 10 and the lock portion 6b of the hood lock button 6, so that the rotation play of the lens hood 1 can be eliminated. In addition, since the lock piece 10 is configured to urge one flange 42a in the circumferential direction, it is not necessary to adjust the rotation play.

  Further, according to the present embodiment, the lock top 10 has the inclined surface 10a1 that advances in the circumferential direction toward the hood lock button 6 toward the outer side of the lens hood 1 in the radial direction. The leaf spring 12 is biased radially inward. Thereby, one flange 42a can be urged | biased with the simple structure at the circumferential direction.

  In the present embodiment, one end of the flange 42a is restrained by the hood lock button 6, but the present invention is not limited to this. For example, instead of this, a convex portion is formed on one of the lens hood 1 or the connecting member 40, a concave portion is formed on the other of the lens hood 1 or the connecting member 40, and the convex portion is fitted in this concave portion. It is good also as a structure which restrains rotation by, and a structure is not limited.

  Further, in the present embodiment, the configuration in which the flange 42a is urged in the circumferential direction using the lock pieces 10 having the inclined surfaces 10a1 formed on both sides in the circumferential direction has been described as an example, but the lock piece 10 is limited to this. Any configuration that can bias the flange 42a in the circumferential direction is acceptable. Further, in the present embodiment, the configuration in which the lock piece 10 and the lock portion 6b of the hood lock button 6 are disposed at both ends of the first groove portion 34a has been described as an example, but the present invention is not limited to this. For example, the lock piece 10 and the lock portion 6b are integrally formed and disposed at one end of the first groove portion 34a, and the flange 42a is biased to the wall portion formed at the other end of the first groove portion 34a. For example, various configurations that can urge and hold the flange 42a accommodated in the first groove portion 34a without causing backlash can be employed.

  Further, in the present embodiment, the lock piece 10 that is movable inward in the radial direction and the leaf spring 12 that biases the lock piece 10 inward in the radial direction biases one end of the flange 42a in the circumferential direction. However, the present invention is not limited to this. For example, a lock piece that can move in the circumferential direction may be provided, and the lock piece may be biased in the circumferential direction by a spring or the like.

DESCRIPTION OF SYMBOLS 1 Lens hood 2 Hood body 2a Through-hole 4 Hood decoration ring 4a Screw hole 6 Hood lock button 6a Operation part 6b Lock part 6b1 Inclined surface 6b2 Abutting surface 6c Arm part 6d Shaft part 8 Lock spring 8a First arm part 8b 2nd Arm part 8c Center part 10 Lock piece 10a Tip part 10a1 Inclined surface 10b Base part 10c Recess 12 Leaf spring 12a Projection part 12b Arm part 12c Bending part 14 Fixing screw 16 Outer cylinder part 16a Vertical extension part 16c Left and right extension part 16c Cutting Notch portion 17 Guide portion 18 Inner cylinder portion 18a Notch portion 18b Opening 18c Edge portion 19 Projection 20 Connection portion 20a Accommodating hole 22 Annular inclined surface 22a Accommodating hole 24 Outer cylinder body 24b Second notch portion 26 Inner cylinder body 26a First 1 notch portion 26b second notch portion 28 first notch portion 30 first protrusion 32 second protrusion 34a first notch Groove 34b Second groove 36 Diameter stop 40 Connection member 40A Base 40B Connection 42a One flange 42b The other flange 42A Notch

Claims (4)

A lens hood attached to a lens barrel having a flange extending in the circumferential direction on the outer surface of the subject side end,
A groove portion that is formed on the inner surface of the lens hood and extends in the circumferential direction that can accommodate the flange portion; and a pair of end portion restraining mechanisms that restrain both ends of the flange portion in the circumferential direction,
One end restraining mechanism of the pair of end restraining mechanisms is configured to urge the flange portion in the circumferential direction toward the other end restraining mechanism, Lens hood. The one end restraining mechanism is
A lock piece that can protrude radially inward from the inner peripheral surface of the lens hood,
A biasing member that biases the lock piece toward the center of the lens hood,
2. The lens hood according to claim 1, wherein the lock piece has an inclined surface that advances in a circumferential direction toward the other end restraining mechanism toward an outer side in the radial direction of the lens hood. The other end restraining mechanism is
A lock button having an engaging portion that can protrude radially inward from the inner peripheral surface of the lens hood, and a button portion that can retract the engaging portion radially outward;
The lens hood according to claim 1, further comprising: a lock button urging member that urges the engagement portion of the lock button to protrude radially inward from an inner peripheral surface of the lens hood. A connection structure between a lens hood and a lens barrel for detachably connecting the lens hood to the subject side end of the lens barrel,
The lens barrel has a flange portion extending in the circumferential direction on the outer surface;
The lens hood includes a circumferentially extending groove portion that is formed on the inner surface of the lens hood and can accommodate the flange portion, and a pair of end portion restraining mechanisms that restrain both ends of the flange portion in the circumferential direction. ,
One end restraining mechanism of the pair of end restraining mechanisms is configured to urge the flange portion in the circumferential direction toward the other end restraining mechanism. Connection structure between the hood and the lens barrel.

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