JP6050092B2 - Lens barrier mechanism of lens barrel - Google Patents

Description

  The present invention relates to a lens barrier mechanism of a lens barrel.

Patent Document 1 is a conventional example of a retractable lens barrel, which supports a cam ring that can rotate around an optical axis and has a cam groove on a peripheral surface, and a front end lens (first group lens) and engages with the cam groove. A front end lens support frame having a cam projection, a rotation driving means for rotationally driving the cam ring, and a lens barrier mechanism that is supported by the front end portion of the front end lens support frame and positioned immediately before the front end lens.
The lens barrier mechanism has a barrier support member supported by the front end portion of the front end lens support frame and having a barrier opening, and a relative position around the rotation center portion between the closed position where the barrier opening is closed and the open position where the barrier opening is opened. A plurality of barrier blades supported by the barrier support member as being rotatable, a barrier urging spring that urges each barrier blade to rotate toward the closed position, and a rotation allowable position that allows the barrier blade to rotate to the closed position. The barrier drive member supported by the barrier support member so as to be rotatable to the forced open position that rotates the barrier blade against the biasing force of the barrier bias spring, and the barrier drive member is rotated toward the forced open position. A drive member biasing spring that biases and has a larger biasing force than the barrier biasing spring. Furthermore, a locking projection is provided on the surface of each barrier blade facing the barrier support member so as to protrude from the rotation center portion on the barrier support member side. One end of the barrier biasing spring is locked to the barrier support member, and the other end of the barrier biasing spring is locked to the locking projection.

When the lens barrel is in the retracted state, a part of the cam ring engages with the barrier driving member, so that the barrier driving member is held at the rotation allowable position, so that the barrier blade is biased by the barrier biasing spring. Is in the closed position.
If the cam ring is rotated in one direction by the driving force of the rotation driving means when the lens barrel is in the retracted state, the lens barrel shifts to the shooting state (expanded state), and the cam groove of the cam ring and the cam projection The front lens support frame moves forward according to the engagement relationship. Further, the part of the cam ring disengages from the barrier drive member, and the barrier drive member is rotated to the forced open position by the biasing force of the drive member biasing spring. Is released.
On the other hand, when the lens barrel is in the photographing state, if the cam ring is reversed in the opposite direction by the driving force of the rotation driving means, the lens barrel returns to the retracted state. Then, according to the engagement relationship between the cam groove and the cam protrusion, the front end lens support frame moves rearward (initial position), and the part of the cam ring engages with the barrier drive member again to bring the barrier drive member into the rotation allowable position. Thus, the barrier blades are returned to the closed position by the biasing force of the barrier biasing spring.

JP 2001-215564 A JP 63-21632 A

In the lens barrier mechanism of Patent Document 1, since a locking projection for locking the barrier biasing spring is provided on the surface of each barrier blade facing the barrier support member, the barrier biasing spring is used as the barrier blade. It can be securely locked against. Therefore, since the urging force of the barrier urging spring can be reliably transmitted to each barrier blade, it is possible to reliably rotate each barrier wing to the closed position when the lens barrel shifts to the retracted state.
However, since the locking protrusions are provided on each barrier blade, the lens barrier mechanism becomes thicker in the optical axis direction by the protrusion amount of the locking protrusions. Further, when the lens barrel is in the retracted state, the entire lens barrel is housed in the camera body, so that if the lens barrier mechanism is thick, the camera body is also thick in the optical axis direction.

  According to the present invention, the lens barrier mechanism is thinned in the optical axis direction while having a structure in which a protrusion for locking the barrier biasing spring is provided on the surface of the barrier blade facing the barrier support member. An object of the present invention is to provide a lens barrier mechanism of a lens barrel capable of performing the above.

The lens barrier mechanism of the lens barrel of the present invention includes a barrier support member provided in a fixed state immediately before the front end lens of the lens barrel, and a closed position for closing the barrier opening of the barrier support member supported by the barrier support member A barrier blade that is rotatable about its own rotation center between the open position where the barrier opening is opened, a barrier urging spring that urges the barrier blade to rotate toward the closed position , and Moved to a position that is supported by the barrier support member and allows the barrier blade to rotate to the closed position, and a position that rotates the barrier blade to the open position against the biasing force of the barrier biasing spring. A part of the barrier urging spring that protrudes toward the barrier support member and is provided on the surface of the barrier blade facing the barrier support member that is offset from the center of rotation. locking Comprising protrusions and the locking which was formed on the surface facing the said barrier blade of said barrier support member, and a protrusion receiving portion a through-hole or recess the locking protrusion is loosely fitted, and the barrier blades Has a plurality of barrier blades independent of each other, and the barrier biasing spring causes the barrier blades to rotate in the closed position and in the direction in which the opposing surface of the barrier blade contacts the barrier support member. It is characterized by moving and energizing .

According to another aspect of the lens barrel mechanism of the lens barrel of the present invention, a barrier support member provided in a fixed state immediately before the front end lens of the lens barrel, and the barrier support member supported by the barrier support member A barrier blade that is rotatable about its own rotation center between the closed position that closes the barrier opening and the open position that opens the barrier opening , and urges the barrier blade to rotate toward the closed position. A barrier urging spring; a position supported by the barrier support member; allowing the barrier wing to rotate to the closed position; and urging the barrier wing against the urging force of the barrier urging spring. A barrier driving member movable to a position where the barrier blade is rotated, and a surface of the barrier blade facing the barrier supporting member that is shifted from the center of rotation and protrudes toward the barrier supporting member, and the barrier With A locking projection portion is locked in the spring, formed on the surface facing the said barrier blade of said barrier support member, and a protrusion receiving portion the locking projection is made of a through-hole or recess loosely fitted the provided surface and the barrier blades after said barrier support member opposite from and front face of the barrier supporting member is exposed in front of the lens barrel, the front of the barrier supporting member, the protrusion made of the through-hole It is characterized in that a decorative member for closing the receiving portion is attached.

In the lens barrier mechanism of the present invention, a locking projection protruding toward the barrier support member is provided on the surface of the barrier blade facing the barrier support member, and the barrier biasing spring is provided on the locking projection. A part of is locked.
However, a protrusion receiving portion consisting of a through-hole or a recess into which the locking protrusion is loosely fitted is formed on the surface of the barrier support member facing the barrier blade, resulting in the provision of the locking protrusion on the barrier blade. Thus, the thickness of the lens barrier mechanism in the optical axis direction does not increase.
Therefore, the lens barrier mechanism can be thinned in the optical axis direction while having a structure in which a locking projection is provided on the barrier blade.

It is the perspective view seen from the front of the retracted state (accommodated state) of the lens barrel of one embodiment to which the present invention is applied. It is the perspective view seen from the front of the photography state (extension state) of a lens barrel. It is a disassembled perspective view of a lens barrel. It is a front view which removes a double-sided tape and a decorative member, and shows a lens barrier mechanism when a barrier blade | wing is located in a closed position. It is a rear view of a lens barrier mechanism when a barrier blade | wing is located in a closed position. It is a rear view which removes and shows the barrier drive member of a lens barrier mechanism when a barrier blade | wing is located in a closed position. It is a front view which removes a double-sided tape and a decorative member, and shows a lens barrier mechanism when a barrier blade | wing is located in an open position. It is a rear view of a lens barrier mechanism when a barrier blade | wing is located in an open position. It is a rear view which removes and shows the barrier drive member of a lens barrier mechanism when a barrier blade | wing is located in an open position. It is the expansion perspective view seen from the back which shows a part of lens barrier mechanism which the barrier blade | wing located in the closed position and removed the barrier drive member. It is an enlarged rear view showing a part of the lens barrier mechanism in which the barrier blade is located at the open position and the barrier driving member is removed. It is the expansion perspective view seen from the front which shows a part of lens barrier mechanism which the barrier blade | wing located in the closed position and removed the double-sided tape and the decorative member.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that “front” and “rear” in the following description, as indicated by the arrows in FIGS. 1 to 3 and FIG. "Back".
The lens barrel 10 of the present embodiment is attached to a camera body CB (see phantom lines in FIGS. 1 and 2), and a retracted position (position in FIG. 1) in which the entire lens barrel 10 is housed in the camera body CB. It can be expanded and contracted in the optical axis direction between a photographing position (position in FIG. 2) protruding forward of the camera body CB through an opening formed in the front surface of the camera body CB.

Next, the structure of the lens barrel 10 will be described.
As shown in FIGS. 1 to 3, the lens barrel 10 has a structure having a large number of constituent members. In the following description, the lens barrier mechanism 25 and other main members (lens barrier mechanism) which are the main parts of the present invention will be described. Only members related to the operation of 25) will be described, and descriptions of other members will be omitted.
The lens barrel 10 is a lens barrel including a first lens group L1, a second lens group L2, a third lens group L3, and a fourth lens group L4. The lens barrel 10 includes a fixed ring 11 made of two members and fixed to the camera body CB. An imaging element 12 and a motor 14 (see FIGS. 1 and 2) are fixed to the fixed ring 11. A cam ring 15 that is linked to the motor 14 (indirectly via other members) is provided in front of the fixed ring 11, and a drive member control protrusion 15 a protrudes forward at the front end of the cam ring 15. It is.
The first group frame 20 that supports the first lens group L1 (front end lens) in a fixed state and is guided linearly is linked to the cam ring 15 (indirectly via other members). Therefore, when the cam ring 15 is rotated by the driving force of the motor 14, the first group frame 20 advances and retracts in the front-rear direction with respect to the fixed ring 11 in conjunction with the rotation operation of the cam ring 15.

A cylindrical cover ring 21 is fixedly fitted to the outer peripheral surface of the first group frame 20, and a lens barrier mechanism 25 is supported on the front end portion of the cover ring 21. The lens barrier mechanism 25 includes a barrier support member 26, a barrier blade 35, a barrier urging spring 45, a barrier driving member 50, a driving member urging spring 55, a double-sided tape 60, and a decorative member 61 as constituent elements.
The lens barrier mechanism 25 has a barrier support member 26 with its peripheral edge fixed to the front end of the cover ring 21. Substantially rectangular barrier opening 27 in the central portion of the barrier support member 26 made of resin (also be made of metal) is formed as a through hole. On the rear surface of the barrier support member 26, two columnar barrier support shafts 28 project rearwardly in a state of being separated by 180 ° in the circumferential direction. Further, on the rear surface of the barrier support member 26, a barrier urging spring locking projection 29 and a driving member urging spring locking projection 30 positioned in the vicinity of each barrier support shaft 28 are provided so as to protrude rearward. Further, the barrier support member 26 is formed with a protrusion receiving portion 31 located between the barrier support shaft 28 and the barrier biasing spring locking protrusion 29 as a through hole. Further, two drive member biasing spring exposure holes 32 are formed in the barrier support member 26 at intervals of 180 ° in the circumferential direction. As shown in FIGS. 1 and 2, a part of the front surface of the barrier support member 26 is exposed forward at the front end of the lens barrel 10.

The pair of barrier blades 35 are both made of resin (can be made of metal), an opening / closing part 36 for opening / closing the barrier opening 27 of the barrier support member 26, and an arm part 37 protruding from the end of the opening / closing part 36. , And a locking projection 39 that is continuous with the end of the arm portion 37. The opening / closing part 36 and the arm part 37 have a thin plate shape located on the same plane, and a support hole 38 (rotation center part) having a circular cross section is formed at the end of the arm part 37. The locking protrusion 39 is thicker in the front-rear direction than the opening / closing portion 36 and the arm portion 37, and its front portion projects forward from the front surfaces of the opening / closing portion 36 and the arm portion 37. A spring locking hole 40 is formed in the locking projection 39. As shown in FIGS. 10 and 11, a part of the rear portion of the spring locking hole 40 (inner surface) is constituted by a first locked portion 41, and the front portion of the spring locking hole 40 (inner surface). Part of this is constituted by the second locked portion 42. Further, a columnar linking projection 43 projects rearward in the vicinity of the support hole 38 on the rear surface of the arm portion 37.
The pair of barrier blades 35 are supported by the barrier support member 26 by rotatably fitting their support holes 38 to the barrier support shaft 28, and the front portions of the respective locking protrusions 39 correspond to the corresponding protrusion receiving portions. 31 is loosely fitted. Each barrier blade 35 has a closed position (see FIGS. 1, 4 to 6, 10, and 12) that closes the barrier opening 27 in a state where the opposing edges of the opening / closing portion 36 are in contact with each other, and the opening / closing portion 36. It is possible to rotate around the barrier support shaft 28 between an open position (see FIGS. 2, 7 to 9, and 11) where the barrier opening 27 is opened by separating the opposing edges of each other.

The pair of barrier urging springs 45 are metal torsion coil springs (torsion springs), a cylindrical coil portion 46, and a first locking portion 47 and a second locking portion 48 that protrude from both ends of the coil portion 46, respectively. And.
The pair of barrier urging springs 45 are fitted inside the coil portion 46 in a state where the barrier urging spring locking projections 29 are prevented from coming off, and the coil portion 46 is elastically deformed from the free state. The engaging portion 47 is attached to the barrier support member 26 by engaging the barrier support member 26 (see FIG. 11). The second locking portion 48 of each barrier biasing spring 45 is inserted into the spring locking hole 40 of the barrier blade 35. Part of the second locking portion 48 is engaged with the side surface of the first locked portion 41 by the urging force generated from the coil portion 46, and another portion of the second locking portion 48 is the second. The rear surface of the locked portion 42 is engaged.
Thus, since each barrier urging spring 45 is engaged with the barrier support member 26 and the corresponding barrier blade 35, the urging force is exerted on the corresponding barrier blade 35 from each barrier urging spring 45. More specifically, the urging force in the direction of moving the barrier blade 35 to the closed position is exerted from the second locking portion 48 to the first locked portion 41, and further, The biasing force in the direction of moving the barrier blade 35 forward is exerted on the locked portion 42. Therefore, when no external force other than the barrier urging spring 45 is applied to each barrier blade 35, each barrier urging spring 45 is positioned at the closed position by the urging force from the second locking portion 48. Further, due to the urging force that the second locking portion 48 exerts on the second locked portion 42, the opening / closing portion 36 and the front surface of the arm portion 37 of each barrier blade 35 and the rear surface of the barrier support member 26 are held in surface contact with each other. Therefore, the pair of barrier blades 35 (opening / closing portion 36 and arm portion 37) are located on the same plane. Therefore, when each barrier blade 35 is positioned in the closed position without applying any external force other than the barrier biasing spring 45 to each barrier blade 35, the opposing edges of the opening / closing portion 36 of the pair of barrier blades 35 are reliably in contact with each other. To do.

A photographing light transmitting hole 51 is formed in the center of the barrier driving member 50 made of a metal plate (can be made of resin). On the peripheral edge of the barrier drive member 50, there are a pair of spring locking protrusions 52 that are 180 ° apart from each other in the circumferential direction, and a cam ring linking protrusion 53 that is located at a circumferential position different from the pair of spring locking protrusions 52. Projected. The spring locking protrusion 52 protrudes forward, and the cam ring linkage protrusion 53 protrudes backward. Further, the barrier driving member 50 is provided with a pair of barrier linking holes 54 spaced apart by 180 ° in the circumferential direction.
The barrier drive member 50 is supported so as to be rotatable relative to the rear surface of the barrier support member 26 around the optical axis. Spaces for positioning the respective barrier blades 35 are formed between the barrier support member 26 and the barrier drive member 50, and the corresponding projections 43 of the barrier blades 35 are respectively idle with respect to the pair of barrier link holes 54. It is fitted. The barrier drive member 50 can rotate relative to the barrier support member 26 between a rotation allowable position shown in FIGS. 4 and 5 and a forced release position shown in FIGS. When the barrier driving member 50 is located at the rotation allowable position, the inner surface of the barrier linking hole 54 is separated from the linking projection 43, so that no force is applied from the barrier driving member 50 to the barrier blade 35. Therefore, the pair of barrier blades 35 are positioned at the closed position by the biasing force of the barrier biasing spring 45. On the other hand, when the barrier driving member 50 is located at the forced opening position, the inner surface of the barrier linking hole 54 is engaged with the linking projection 43, and the barrier blade 35 is located at the open position against the urging force of the barrier urging spring 45. To do.

The pair of drive member urging springs 55 are metallic tension springs, and include a cylindrical coil portion 56 and a first locking portion 57 and a second locking portion 58 that protrude from both ends of the coil portion 56, respectively. It has.
The pair of drive member urging springs 55 are engaged with the first engagement portions 57 in a state in which the first engagement portions 57 are retained from the corresponding drive member urging spring engagement protrusions 30 of the barrier support member 26, and further, the second engagement members 57 are engaged. The stopper 58 is attached between the barrier support member 26 and the barrier drive member 50 by being locked with the corresponding spring lock protrusion 52 of the barrier drive member 50 in a state of being prevented from coming off. When the pair of drive member urging springs 55 are attached to the barrier support member 26 and the barrier drive member 50, the coil portion 56 extends from the free state immediately after the drive member urging spring exposure hole 32. The biasing spring 55 generates a biasing force in a direction that rotates the barrier driving member 50 in one direction. The urging force generated by each driving member urging spring 55 is a direction in which the barrier driving member 50 is rotated to the forced opening position, and the urging force is larger than the urging force generated by each barrier urging spring 45. Therefore, when no external force other than the drive member biasing spring 55 is applied to the barrier drive member 50 (and no biasing force other than the barrier biasing spring 45 is applied to the barrier blade 35), the barrier drive member 50 is forced. The pair of barrier blades 35 located at the open position are located at the open position.

  A rear surface of a pair of double-sided tapes 60 having an arc shape is attached to the front surface of the barrier support member 26 so as to close the pair of protrusion receiving portions 31. Furthermore, two locations (separated by 180 ° in the circumferential direction) on the rear surface of the annular decorative member 61 are attached to the front surface of each double-sided tape 60. Therefore, the protrusion receiving portion 31 of the barrier support member 26 (and the drive member biasing spring exposure hole 32 of the barrier support member 26) is covered with the decorative member 61.

Next, the operation of the lens barrel 10 will be described.
When the lens barrel 10 is located at the retracted position (the position shown in FIG. 1), the drive member control protrusion 15a of the cam ring 15 located inside the camera body CB engages with the cam ring linkage protrusion 53 of the barrier drive member 50. Thus, the barrier driving member 50 is held at the rotation allowable position against the biasing force of the driving member biasing spring 55. Therefore, the pair of barrier blades 35 are positioned at the closed position by the biasing force of the barrier biasing spring 45, and the barrier opening 27 of the barrier support member 26 is closed by the opening / closing portion 36 of the pair of barrier blades 35.
When the main switch (not shown) provided on the camera body CB is turned on to rotate the motor 14 in the forward direction, the entire lens barrel 10 is extended to the photographing position by the rotational driving force of the motor 14, and the first group frame 20 and the cover The ring 21 moves in front of the camera body CB. At this time, although the cam ring 15 also moves forward from the initial position, the movement amount of the first group frame 20 and the cover ring 21 forward is larger than the movement amount of the cam ring 15 forward. The cam ring linking projection 53 is separated forward from the drive member control projection 15a. As a result, the barrier driving member 50 is rotated to the forcible opening position by the biasing force of the driving member biasing spring 55, so that each barrier blade 35 has its own locking projection 39 in the corresponding projection receiving portion 31 by a minute angle. While rotating, it moves to the open position against the biasing force of the barrier biasing spring 45.
On the other hand, when the main switch is turned OFF when the lens barrel 10 is located at the photographing position, the motor 14 is reversed. Then, the entire lens barrel 10 is returned to the retracted position by the rotational driving force of the motor 14, and the cam ring 15, the first group frame 20, and the cover ring 21 are moved back into the camera body CB. At this time, the lens barrier mechanism 25 moves back to the initial position together with the first group frame 20 and the cover ring 21 (the locking projection 39 rotates by a minute angle in the projection receiving portion 31), and the barrier driving member The drive member control protrusion 15a of the cam ring 15 is engaged with the 50 cam ring linkage protrusions 53 again. As a result, the barrier driving member 50 is held at the rotation allowable position against the biasing force of the driving member biasing spring 55, so that the pair of barrier blades 35 are moved back to the closed position by the biasing force of the barrier biasing spring 45. To do.

In the lens barrel 10 of the present embodiment described above, the locking protrusion 39 protruding forward is projected on the front surface of each barrier blade 35, and the locking protrusion 39 (first locked portion 41) is provided. Since the second locking portion 48 of each barrier biasing spring 45 is locked to the second locked portion 42), each barrier biasing spring 45 can be securely locked to each barrier blade 35. It is. Therefore, the urging force of each barrier urging spring 45 can be reliably transmitted to the barrier blade 35. Therefore, when the lens barrel 10 is located at the retracted position, each barrier blade 35 can be reliably rotated to the closed position.
In addition, since the protrusion supporting portion 31 in which the locking protrusion 39 of the barrier blade 35 is loosely fitted is formed on the barrier support member 26, the lens is caused by providing the locking protrusion 39 on the barrier blade 35. The thickness of the barrier mechanism 25 in the optical axis direction does not increase. Therefore, the lens barrier mechanism 25 can be thinned in the optical axis direction and the camera body CB can be thinned in the optical axis direction, although the locking projection 39 is provided on the barrier blade 35.
Further, before the double-sided tape 60 and the decorative member 61 are attached to the front surface of the barrier support member 26, the second locking portion 48 of the barrier urging spring 45 passes through the protrusion receiving portion 31 of the barrier support member 26 and the spring locking hole 40. Since it can be visually confirmed whether it is locked to (first locked portion 41, second locked portion 42), it is possible to suppress the occurrence of defective products.

As mentioned above, although this invention was demonstrated using the said embodiment, this invention is not limited to the said embodiment.
For example, the protrusion receiving portion 31 may be configured by a bottomed concave portion formed on the rear surface of the barrier support member 26.
In addition, the barrier blade that opens and closes the barrier opening 27 may be constituted by one or three or more barrier blades.
Further, the drive member biasing spring may be changed to a spring means having a different form from the above.
Furthermore, the present invention may be applied to a lens barrel that does not expand and contract in the optical axis direction.

DESCRIPTION OF SYMBOLS 10 Lens barrel 11 Fixed ring 12 Image pick-up element 14 Motor 15 Cam ring 15a Drive member control protrusion 20 1 group frame (lens support frame)
21 Cover ring 25 Lens barrier mechanism 26 Barrier support member 27 Barrier opening 28 Barrier support shaft 29 Barrier biasing spring locking projection 30 Driving member biasing spring locking projection 31 Projection receiving portion 32 Driving member biasing spring exposure hole 35 Barrier blade 36 Opening / closing part 37 Arm part 38 Support hole (rotation center part)
39 Locking projection 40 Spring locking hole 41 First locked portion 42 Second locked portion 43 Linking protrusion 45 Barrier spring 46 Coil portion 47 First locking portion 48 Second locking portion 50 Barrier drive Member 51 photographing light transmitting hole 52 spring locking projection 53 cam ring linking projection 54 barrier linking hole 55 driving member biasing spring 56 coil portion 57 first locking portion 58 second locking portion 60 double-sided tape 61 decorative member CB camera body L1 first lens group (front end lens)
L2 Second lens group L3 Third lens group L4 Fourth lens group

Claims (2)

A barrier support member provided in a fixed state immediately before the front end lens of the lens barrel;
A barrier blade that is supported by the barrier support member and is rotatable between a closed position that closes the barrier opening of the barrier support member and an open position that opens the barrier opening about its own rotation center;
A barrier biasing spring that rotates urged toward the barrier blades to the closed position,
A position supported by the barrier support member that allows the barrier blade to rotate to the closed position, and a position that rotates the barrier blade to the open position against the biasing force of the barrier biasing spring. A movable barrier driving member;
The above rotational center to the surface facing the said barrier support member of the barrier blade is provided by shifting the position, the barrier protrudes the support member side and the locking part of the barrier biasing spring is engaging Protrusions,
A protrusion receiving portion formed on a surface of the barrier support member facing the barrier blade, the protrusion receiving portion including a through hole or a recess into which the locking protrusion is loosely fitted;
Equipped with a,
The barrier blade has a plurality of barrier blades independent of each other,
The barrier urging spring moves and urges each of the barrier blades in a rotation direction to the closed position and a direction in which the opposing surface of the barrier blade comes into contact with the barrier support member ;
The lens barrier mechanism of the lens barrel characterized by the above. A barrier support member provided in a fixed state immediately before the front end lens of the lens barrel;
A barrier blade that is supported by the barrier support member and is rotatable between a closed position that closes the barrier opening of the barrier support member and an open position that opens the barrier opening about its own rotation center ;
A barrier urging spring that urges the barrier blade to rotate toward the closed position;
A position supported by the barrier support member that allows the barrier blade to rotate to the closed position, and a position that rotates the barrier blade to the open position against the biasing force of the barrier biasing spring. A movable barrier driving member;
For locking the barrier blade, which is provided on the surface of the barrier blade facing the barrier support member so as to be displaced from the center of rotation, and protrudes toward the barrier support member and a part of the barrier urging spring is locked. Protrusions ,
A protrusion receiving portion formed on a surface of the barrier support member facing the barrier blade, the protrusion receiving portion including a through hole or a recess into which the locking protrusion is loosely fitted;
With
The rear surface of the barrier support member and the barrier blade face each other, and the front surface of the barrier support member is exposed in front of the lens barrel,
A decorative member for closing the protrusion receiving portion made of a through hole is attached to the front surface of the barrier support member ,
The lens barrier mechanism of the lens barrel characterized by the above .

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