JP6071355B2 - Lens barrel and imaging device having the same - Google Patents

Description

The present invention relates to a lens barrel and an imaging device including the lens barrel, and more particularly to a lens barrel having a barrier device.

  In general, a barrier device that protects an optical lens by covering the front surface of the optical lens in an optical apparatus is known. In particular, a barrier device is widely used in an imaging device such as a camera having a retractable lens barrel that is one of lens barrels driven by a motor or the like.

  This type of barrier device has a barrier holding frame, a barrier cover, a barrier blade, and the like, and a light incident opening is formed in the barrier cover. Further, the barrier blade covers the light incident opening of the barrier cover when not photographing, and is housed in a position retracted from the light incident opening of the barrier cover when photographing. The barrier cover and the barrier holding frame are adhered and held to each other on a surface substantially parallel to the optical axis outside the driving range of the barrier blade.

  By the way, with the miniaturization of the camera, there is a demand for reducing the diameter of the lens barrel. However, in the barrier device, when the storage area of the barrier blade (the area of the surface parallel to the optical axis direction) increases, the lens barrel inevitably increases in diameter.

  On the other hand, in order to reduce the diameter of the lens barrel, two sets of a plurality of small-sized barrier blades that can be overlapped and expanded are used to block the light incident opening when the barrier blades are expanded, and light is incident when the barrier blades are overlapped. There is one that is accommodated outside the opening (see Patent Document 1).

JP 2012-42683 A

  However, in the configuration described in Patent Document 1, since the driving range in the connecting portion between the barrier blades is large, a sufficient adhesion area between the barrier cover and the barrier holding frame cannot be secured. For this reason, there exists a possibility that the adhesive strength of a barrier cover and a barrier holding frame may fall.

  On the other hand, if the bonding area is increased in order to ensure the bonding strength, the lens barrel may be increased in diameter this time.

Accordingly, an object of the present invention is to reduce the size of the lens barrel and to sufficiently secure the adhesive strength between the barrier cover and the barrier holding frame (barrier holding member), and to provide an image with the lens barrel. To provide an apparatus.

In order to achieve the above object, the present invention provides a barrier cover that is disposed on the subject side in the optical axis direction of an imaging lens and has an incident opening that allows light to enter the imaging lens, and an opening that opens the incident opening. A first lens barrel that includes a first barrier member and a second barrier member that are overlapped in a state and deployed in a closed state that closes the entrance opening and protects the imaging lens, the first barrier member And a barrier driving member that drives the second barrier member, and a barrier holding member that holds the barrier driving member and has an adhesive surface for adhering and holding the barrier cover on the subject side in the optical axis direction. It has, above the barrier holding member penetration hole at the image plane side of the adhesive surface is formed, the first barrier member to restrict the movement range of the second barrier member It has a shielding portion for shielding the incident opening and the regulating portion, wherein with the barrier driving member first surface is a sliding surface of the first barrier member is formed, the restricting portion A second surface including an operating range is formed, the first surface is located closer to the subject side in the optical axis direction than the second surface, and the shielding portion of the first barrier member is the restriction portion. The intrusion part is formed closer to the subject in the optical axis direction than a part of the intrusion part, and the intrusion part intrudes into the intrusion hole with the opening operation of the first barrier member.

  According to the present invention, the lens barrel can be reduced in size, and the adhesive strength between the barrier cover and the barrier holding member can be increased.

It is a perspective view which shows the external appearance about an example of an imaging device which has a lens barrel provided with the barrier apparatus by embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the periphery of the barrier mechanism (barrier apparatus) with which the lens barrel shown in FIG. 1 was equipped, and the 1st group lens barrel. FIG. 3 is a perspective view of the barrier drive ring shown in FIG. 2 as viewed from the subject side (front side) in the optical axis direction. It is a perspective view for demonstrating the barrier holding frame shown in FIG. FIG. 3 is a view of the first barrier blade opening / closing mechanism shown in FIG. 2 as viewed from the subject side in the optical axis direction, and (a) is a diagram showing a state in which the first barrier blade is in a closed position that closes the light incident opening of the barrier cover. (B) is a figure which shows the state which exists in the open position which a 1st barrier blade | wing opens | releases a light-incidence opening. It is the figure which looked at the 1st-3rd barrier blade | wing shown in FIG. 2 from the image surface side, (a) shows the state which exists in the closed position which the 1st-3rd barrier blade block | closes the light incident opening of a barrier cover. FIG. 4B is a diagram illustrating a state where the first to third barrier blades are in an open position where the light incident opening is opened. It is a perspective view which shows the 1st barrier blade | wing and 2nd barrier blade | wing shown in FIG. 2, (a) exists in the closed position which the 1st barrier blade | wing and 2nd barrier blade | wing block | close the light incident opening of a barrier cover. The perspective view which shows a state, (b) is a perspective view which shows the state which exists in the open position which the 1st barrier blade | wing and 2nd barrier blade | wing open | release a light-incidence opening. FIG. 3 is a view of the first to third barrier blades and the barrier cover shown in FIG. 2 as viewed from the subject side in the optical axis direction at a closed position. It is a perspective view which shows the barrier mechanism shown in FIG. It is a perspective view which shows the 1st barrier blade | wing, barrier drive ring, and biasing member which are shown in FIG.

Hereinafter, an example of a lens barrel including a barrier device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an appearance of an example of an imaging apparatus having a lens barrel provided with a barrier device according to an embodiment of the present invention.

  The illustrated image pickup apparatus is, for example, a digital camera (hereinafter simply referred to as a camera) 100, and here, the camera 100 is shown in a power-on state, which is a state in which photographing is possible. The camera 100 includes a camera body 101, and a retractable lens barrel 110 is provided on the camera body 101. In the power-on state, the lens barrel 110 is in the extended state (photographable state). On the other hand, when the power-off state or the reproduction mode for reproducing an image is set, the lens barrel 110 is in a retracted state (non-shooting state).

  The lens barrel 110 has a lens group (imaging lens) which is a photographic optical system. These lens groups move in the optical axis direction, and the lens barrel 110 is in a state where it can be photographed and in an unphotographed state. It shifts to the retracted state, which is a possible state. The camera body 101 includes a main switch 102, a shooting switch 103 (release switch), and a zoom lever 107.

  The main switch 102 is a switch for switching the power on and off. When the photographing switch 103 is pressed halfway (SW1 is depressed), the camera 100 performs photographing preparation operations such as photometry and autofocus (AF). Then, when the photographing switch 103 is fully pressed (SW2 is pressed), the camera 100 performs a photographing operation (so-called main exposure) and an image recording operation.

  The flash unit 104 provided on the front surface of the camera body 101 emits light according to ambient brightness (or darkness). The distance measuring unit 105 provided on the front surface of the camera body 101 is used, for example, when irradiating infrared light and measuring the distance between the camera 100 and the subject according to the reflection.

  Although not shown in FIG. 1, in the camera body 101, an imaging element (imaging unit) such as a CCD or CMOS sensor is arranged at the rear stage of the imaging optical system (that is, the imaging lens) of the lens barrel 110. Yes. The image sensor then photoelectrically converts the subject image (optical image) formed by the imaging lens to generate an image signal.

  FIG. 2 is an exploded perspective view showing the periphery of the barrier mechanism (barrier device) and the first group lens barrel provided in the lens barrel 110 shown in FIG.

  In FIG. 2, the subject side in the optical axis direction is referred to as the front side, and the imaging element side in the optical axis direction is referred to as the rear side or the image plane side. The lens barrel 110 includes a barrier mechanism, and includes a first lens holding frame 8 (lens holding member), a first lens 9 that is a group lens, and a cam barrel 10.

  The barrier mechanism includes a barrier holding frame 1 (barrier holding member), a barrier driving ring 2 (barrier driving member), barrier blades 3 to 5, a biasing member 6, a barrier cover 7, and an adhesive member 13. The barrier holding frame 1 is disposed at the front end (on the subject side in the optical axis direction) of the lens barrel 110. A first lens holding frame 8 that holds the first lens 9 is provided on the inner peripheral portion of the barrier holding frame 1, and a cam cylinder 10 is disposed on the inner peripheral portion of the first lens holding frame 8.

  Here, the feeding mechanism of the first lens holding frame 8 and the barrier holding frame 1 will be described.

  A follower pin 11 is press-fitted into the first lens holding frame 8, and the follower pin 11 engages with the cam groove 10 a of the cam barrel 10. Further, a follower pin 12 is press-fitted into the barrier holding frame 1, and the follower pin 12 engages with the cam groove 10 b of the cam cylinder 10.

  When the cam cylinder 10 is rotationally driven by a zoom motor (not shown) as driving means, the follower pins 11 and 12 trace the cam grooves 10a and 10b, respectively, and the first lens holding frame 8 and the barrier holding frame 1 Moves relative to the cam cylinder 10. Thus, the lens barrel 110 is extended and retracted.

  The first barrier blade 3 is formed of resin, and the second barrier blade 4 and the third barrier blade 5 are each formed of metal. By using the second barrier blade 4 and the third barrier blade 5 as metal parts, the barrier device and the lens barrel 110 can be made thinner than those formed from resin parts.

  The first barrier blade 3, the second barrier blade 4, the third barrier blade 5, and the biasing member 6 such as a spring are centered on the optical axis of the first lens 9, which is a first group lens. A pair is arranged point-symmetrically. The first to third barrier blades 3 to 5 are opened and closed in a direction intersecting the optical axis, closed when the lens barrel 110 is retracted, and opened when the lens barrel 110 is extended.

  The first barrier blade 3, the second barrier blade 4, and the third barrier blade 5 are deployed at a closed position that closes the light incident opening 7 a of the barrier cover 7 to protect the imaging lens, and the light incident opening. It is superimposed in the optical axis direction at the open position where 7a is opened.

  The barrier cover 7 is disposed on the foremost side (the subject side in the optical axis direction) of the lens barrel 110, and is adhered and held to the barrier holding frame 1 by an adhesive member 13 such as a double-sided tape, and first to third barrier blades. 3 to 5 are protected. Further, the barrier cover 7 is formed with a light incident opening 7a that opens so as not to block a light beam incident on an imaging element (not shown) via the first lens 9 that is a first group lens.

  FIG. 3 is a perspective view of the barrier drive ring 2 shown in FIG. 2 as viewed from the subject side (front side) in the optical axis direction.

  A barrier drive ring 2 that is a barrier drive member is rotatably held by a barrier holding frame 1 that is a barrier holding member. The barrier drive ring 2 is provided with a follower arm 2a (drive unit) that extends to the image plane side in the optical axis direction and is cut into a slope shape (taper shape).

  When the lens barrel 110 is retracted, the follower arm 2a comes into contact with an operating wall 10c (see FIG. 2) as a rotating contact portion provided on the cam barrel 10. When the cam cylinder 10 is rotated, the follower arm 2a in contact with the operating wall 10c is rotated, and the entire barrier drive ring 2 is rotated. Further, the barrier drive ring 2 is provided with a plurality of extending portions 2b extending to the image plane side in the optical axis direction. Further, shafts 2c and 2d for engaging a biasing member 6 such as a spring and contact portions 2e and 2f for driving the first barrier blade 3 are provided on the outer peripheral portion of the barrier drive ring 2. Yes.

  Further, on the outer peripheral portion of the barrier drive ring 2, position restricting portions 2g for restricting the position of the barrier drive ring 2 in the optical axis direction are provided at a plurality of locations. The barrier drive ring 2 includes a sliding surface 2h (first surface) and a non-sliding surface 2j (second surface) that are in contact with the sliding surface 3k (see FIG. 6) of the first barrier blade 3. And are defined in two ways. As shown in FIG. 3, the non-sliding surface 2j is formed on the image surface side with respect to the sliding surface 2h.

  FIG. 4 is a perspective view for explaining the barrier holding frame 1 shown in FIG.

  The barrier holding frame 1 is provided with an arc hole 1a through which a follower arm 2a provided in the barrier driving ring 2 passes and an extending portion 1b for guiding the sliding of the barrier driving ring 2. The outer periphery of the extension 2b formed on the barrier drive ring 2 slides along the extension 1b provided on the inner peripheral surface of the opening of the barrier holding frame 1, so that the barrier drive ring 2 rotates smoothly. Can move.

  Further, the barrier holding frame 1 is provided with holes 1c and 1d through which the rotation shaft of the first barrier blade 3 is inserted, and shafts 1e and 1f which are inserted through the rotation hole of the third barrier blade 5 are provided. Is provided. Further, four bonding surfaces 1j for bonding the bonding member 13 are formed on the outer periphery of the barrier holding frame 1.

In addition, the barrier holding frame 1 includes a plurality of position restricting holes 1k for restricting the position of the barrier drive ring 2 in the optical axis direction and intrusion holes 1m into which intrusions of first barrier blades 3 described later enter. Is formed. The entry hole 1m is formed on the image side of the bonding surface 1j in the barrier holding frame 1.

  In the barrier drive ring 2, the position of the barrier drive ring 2 in the optical axis direction is restricted by the position restricting portion 2g formed on the outer periphery rotating inside the position restricting hole 1k formed in the barrier holding frame 1. .

  The position restricting hole 1k and the entry hole 1m of the barrier holding frame 1 are formed by a slide structure with different phases.

  FIG. 5 is a diagram of the opening / closing mechanism of the first barrier blade 3 shown in FIG. 2 as viewed from the subject side in the optical axis direction. FIG. 5A is a view showing a state in which the first barrier blade 3 is in a closed position where the light incident opening 7a of the barrier cover 7 is closed. FIG. It is a figure which shows the state which exists in the open position which opens the incident opening 7a.

  In FIG. 5, the second barrier blade 4 and the third barrier blade 5 are omitted for convenience of explanation.

  The first barrier blade 3 is provided with a shaft 3a (see FIG. 6) that protrudes toward the optical axis direction image sensor and a shaft 3b that protrudes toward the subject side in the optical axis direction. The shaft 3a is inserted into and supported by holes 1c and 1d formed in the barrier holding frame 1. As a result, the first barrier blade 3 moves so as to be rotatable in the opening and closing direction around each axis 3a.

  Further, the first barrier blade 3 is provided with a protrusion 3c in the vicinity of the shaft 3a, and a spring hook 3d is provided so as to be connected to the protrusion 3c. The urging member 6 is always stretched between the spring hook portion 3d and the shafts 2c and 2d of the barrier drive ring 2 in a tensioned state. Since the position of the spring hook portion 3d is closer to the optical axis center than the shaft 3b, the barrier drive ring 2 is urged in the clockwise direction in the figure by the urging force of the urging member 6.

  Further, the first barrier blade 3 is formed with a restricting portion 3e that restricts the moving range of the second barrier blade 4. The restricting portion 3e is formed long in the rotational direction in which the first barrier blade 3 opens and closes. Of the inner walls of the restricting portion 3e, the wall portion in the closing direction is the first wall portion 3e1, and the wall portion in the opening direction is the second wall portion 3e2. Further, the first barrier blade 3 has a flange 3e3 (see FIG. 7), and its operation will be described later.

  Here, the transition operation from the closed position to the open position of the first barrier blade 3 will be described.

  When the first barrier blade 3 is in the closed position (see FIG. 5A), the follower arm 2a of the barrier drive ring 2 and the operating wall 10c of the cam cylinder 10 are in contact with each other. As the cam cylinder 10 rotates, the barrier drive ring 2 rotates clockwise, and the contact portions 2e and 2f drive the protrusion 3c of the first barrier blade 3.

  The first barrier blade 3 is driven to rotate counterclockwise in the drawing around the shaft 3a as the barrier drive ring 2 further rotates. Then, each abutment portion 3f abuts against stoppers 1g and 1h provided on the barrier holding frame, so that the rotation is stopped (see FIG. 5B).

  On the other hand, when the first barrier blade 3 moves from the open position to the closed position, the cam cylinder 10 rotates in the opposite direction to that in the movement operation from the closed position to the open position, so that the barrier drive ring 2 It is rotated counterclockwise. As a result, the abutting portions 2e and 2f of the barrier drive ring 2 tend to be separated from the protruding portion 3c of the first barrier blade 3, but due to the urging force of the urging member 6, the protruding portion 3c is brought into contact with the abutting portions 2e and 2e. It rotates in the direction of contact with 2f. That is, the first barrier blade 3 is driven to rotate clockwise in the figure about the shaft 3a.

  By further rotation of the first barrier blade 3, the mating surfaces 3g of the first barrier blade 3 come into contact with each other, and the rotation of the first barrier blade 3 is stopped. In order to increase the urging force of the urging member 6 during the opening operation of the first to third barrier blades 3 to 5, the barrier drive ring 2 is further rotated counterclockwise in the drawing, The rotation is stopped (see FIG. 5A).

  FIG. 6 is a view of the first to third barrier blades 3 to 5 shown in FIG. 2 as viewed from the image plane side. FIG. 6A is a view showing a state in which the first to third barrier blades 3 to 5 are in a closed position where the light incident opening 7a of the barrier cover 7 is closed, and FIG. It is a figure which shows the state which has the 3rd barrier blades 3-5 in the open position which open | releases the light-incidence opening 7a.

  FIG. 7 is a perspective view showing the first barrier blade 3 and the second barrier blade 4 shown in FIG. FIG. 7A is a perspective view showing a state in which the first barrier blade 3 and the second barrier blade 4 are in a closed position where they block the light incident opening 7a of the barrier cover 7, and FIG. It is a perspective view which shows the state which has the 1st barrier blade | wing 3 and the 2nd barrier blade | wing 4 in the open position which open | releases the light-incidence opening 7a.

  The opening / closing mechanism of the first to third barrier blades 3 to 5 will be described with reference to FIGS.

  Each shaft 3b (see FIG. 5) of the first barrier blade 3 is inserted into a hole (not shown) formed in the second barrier blade 4. As a result, the second barrier blade 4 moves so as to be rotatable in the opening and closing direction around each axis 3b. The second barrier blade 4 has a hook portion 4a configured in a hook shape.

  As shown in FIG. 7, the hook portion 4a includes a contact portion 4a1 and a disengagement restricting portion 4a2. When the first barrier blade 3 rotates, the contact portion 4a1 of the second barrier blade 4 is driven to contact by the first wall portion 3e1 and the second wall portion 3e2 of the first barrier blade 3. . As a result, the second barrier blade 4 can follow the opening / closing direction with respect to the first barrier blade 3.

  Further, the disengagement restricting portion 4a2 of the second barrier blade 4 and the first barrier blade 3 are prevented from being disengaged from each other by an impact or an external force. The flange 3e3 maintains an engagement relationship in the entire opening / closing region by the barrier blades. Further, the second barrier blade 4 is formed with a notch portion 4b and a contact portion 4c for enabling the third barrier blade 5 to follow the opening / closing direction.

  The shafts 1 e and 1 f of the barrier holding frame 1 are inserted into the holes 5 a of the third barrier blade 5. As a result, the third barrier blade 5 moves so as to be rotatable in the opening / closing direction about the shafts 1e and 1f.

  On the other hand, a hook portion 5 c is formed at a site away from the hole 5 a of the third barrier blade 5. The hook portion 5c is formed in a substantially U-shape that is bent 90 degrees from the flat portion that shields the light incident opening 7a toward the image pickup element side in the optical axis direction, and further bent 90 degrees inward.

  The abutting portion 4c and the cutout portion 4b of the second barrier blade 4 abut on and drive the bent portion 5b and the hook portion 5c of the third barrier blade 5, respectively. The barrier blade 4 can be moved in the opening / closing direction.

  Next, the transition operation from the closed position to the open position of the first to third barrier blades 3 to 5 will be described.

  The first barrier blade 3 starts to rotate clockwise in FIG. 6A from the closed state shown in FIG. 6A and FIG. 7A. In the initial stage of the rotation, the second barrier blade 4 and the third barrier blade 5 maintain their positions. After a while, the first wall 3e1 of the restricting portion 3e of the first barrier blade 3 comes into contact with the contact portion 4a1 of the second barrier blade 4.

  When the first barrier blade 3 further rotates in the opening direction from this point, the first wall portion 3e1 drives the contact portion 4a1, so that the second barrier blade 4 also rotates in the opening direction.

  When the first barrier blade 3 and the second barrier blade 4 continue to rotate further in the opening direction, the contact portion 4 c of the second barrier blade 4 eventually contacts the bent portion 5 b of the third barrier blade 5. When the first barrier blade 3 and the second barrier blade 4 further rotate in the opening direction from this point, the contact portion 4c drives the bent portion 5b, so that the third barrier blade 5 also moves in the opening direction. Rotate.

  When all of the first to third barrier blades 3 to 5 are rotationally moved in the opening direction, the contact portion 3f of the first barrier blade 3 contacts the stoppers 1g and 1h of the barrier holding frame and stops rotating. The driven second barrier blade 4 and third barrier blade 5 also stop rotating. Thereby, the 1st-3rd barrier blades 3-5 will be in the open state shown in FIG.6 (b).

  On the other hand, when the first to third barrier blades 3 to 5 are moved from the open position to the closed position, the first barrier blade 3 is moved from the open state shown in FIGS. 6B and 7B. 6B, the counterclockwise rotation is started. In the initial stage of the rotation, the second barrier blade 4 and the third barrier blade 5 maintain their positions. After a while, the second wall 3e2 of the restricting portion 3e in the first barrier blade 3 comes into contact with the contact portion 4a1 of the second barrier blade 4.

  When the first barrier blade 3 further rotates in the closing direction from this point, the second wall portion 3e2 drives the contact portion 4a1, so that the second barrier blade 4 also rotates in the closing direction.

  When the first barrier blade 3 and the second barrier blade 4 continue to rotate in the closing direction, the notched portion 4b of the second barrier blade 4 eventually comes into contact with the hook portion 5c of the third barrier blade 5. When the first barrier blade 3 and the second barrier blade 4 further rotate in the closing direction from this point, the notch portion 4b drives the hook portion 5c, so that the third barrier blade 5 also moves in the closing direction. Rotate.

  When all of the first to third barrier blades 3 to 5 are rotationally moved in the closing direction and the mating surfaces 3g of the first barrier blades 3 come into contact with each other, the rotation is stopped, and the second driven is followed. The barrier blades 4 and the third barrier blades 5 also stop rotating.

  As described above, the rotation of the barrier drive ring 2 stops at a position further rotated from the rotation stop position of the barrier blade 3. As described above, the first to third barrier blades 3 to 5 are in the closed state shown in FIG.

  FIG. 8 is a diagram of the first to third barrier blades 3 to 5 and the barrier cover shown in FIG. 2 as viewed from the subject side in the optical axis direction at the closed position. FIG. 9 is a perspective view showing the barrier mechanism shown in FIG. FIG. 10 is a perspective view showing the first barrier blade 3, the barrier drive ring 2, and the urging member 6 shown in FIG. 9 and 10 show a state in which the first to third barrier blades 3 to 5 are opened.

  Here, with reference to FIGS. 5-10, the penetration | invasion mechanism to the barrier holding frame 1 of the 1st barrier blade | wing 3 is demonstrated.

  The adhesive surface 1j of the barrier holding frame 1 is formed outside the operating range of the first to third barrier blades 3-5. However, as shown in FIG. 5B, in the state where the first to third barrier blades 3 to 5 are in the open position, a part of the first barrier blade 3 and the barrier holding in a plane parallel to the optical axis. The bonding surface 1j of the frame 1 overlaps. Here, a portion where the first barrier blade 3 overlaps the barrier holding frame 1 is defined as an intrusion portion 3j (see FIG. 5A).

  As shown in FIGS. 9 and 10, the front surface of the intrusion portion 3j of the first barrier blade 3 is formed closer to the image plane than the shielding portion 3h that shields the light incident opening 7a. Further, the back surface of the intrusion portion 3 j of the first barrier blade 3 is formed on the image surface side as compared with the sliding surface 3 k with the barrier drive ring 2.

  In this way, the intrusion portion 3j of the first barrier blade 3 is formed at a position one step below the shielding portion 3h. Since the intruding portion 3j of the first barrier blade 3 is covered with the shielding portion 4d of the second barrier blade 4 at the closed position (closed position), it is not exposed to the external surface as shown in FIG. For this reason, even if there is a level difference between the shielding part 3h and the intrusion part 3j of the first barrier blade 3, the intrusion part 3j does not appear on the appearance surface, and the appearance is not impaired.

  Further, as described above, the barrier drive ring 2 is formed with the sliding surface 2h and the non-sliding surface 2j which are sliding surfaces with the first barrier blade 3. Here, the non-sliding surface 2j is formed on the image plane side with respect to the sliding surface 2h.

  In the opening / closing operation of the first barrier blade 3, the intrusion portion 3j passes over the region S1 shown in FIG. 5A, but the non-sliding surface 2j of the barrier drive ring 2 includes the passage region S1. It is formed as follows.

On the other hand, when the user intentionally moves the first to third barrier blades 3 to 5 in the opening direction from the closed state of the first to third barrier blades 3 to 5 or when an impact is applied, barrier driving ring 2 while holding the closed position, the first barrier blade 3 is moved to the open position. At this time, if the intruding portion 3j of the first barrier blade 3 and the sliding surface 2h of the barrier drive ring 2 collide, the first barrier blade 3 or the barrier drive ring 2 may be deformed.

  Therefore, in the present embodiment, the barrier driving is performed so that the above-described collision does not occur even when the first barrier blade 3 is moved to the open position while the barrier driving ring 2 holds the closed position. The non-sliding surface 2j of the ring 2 is formed so as to include the passage region S2 of the intrusion portion 3j.

  Thus, the non-sliding surface 2j of the barrier drive ring 2 is formed so as to include the entire passage region of the intrusion portion 3j of the first barrier blade 3. In order to stably open and close the first barrier blade 3, by providing a gap in the optical axis direction between the intrusion portion 3j and the non-sliding surface 2j, the sliding surface 3k and the sliding surface 2h are brought into contact with each other. Ensure the relationship.

  As shown in FIGS. 9 and 10, the barrier drive ring 2 includes contact portions 2e and 2f for making contact with the protrusions 3c of the first barrier blade 3, and therefore in the optical axis direction. A predetermined thickness is required. Similarly, since it is necessary to install the urging member 6 having a predetermined outer diameter, the barrier driving ring 2 needs to have a predetermined thickness in the optical axis direction. For this reason, the non-sliding surface 2j can be formed without increasing the thickness of the barrier drive ring 2 in the optical axis direction.

  In the above configuration, as shown in FIG. 9, the intrusion portion 3 j enters the intrusion hole 1 m of the barrier holding frame 1. In order to smoothly enter the intrusion portion 3j of the first barrier blade 3 into the intrusion hole 1m of the barrier holding frame 1, the front end portion of the intrusion portion 3j of the barrier blade 3 is inclined toward the front end side (taper portion). Is formed.

  In the barrier mechanism (barrier device) according to the present embodiment, since the second barrier blade 4 and the third barrier blade 5 are formed of metal, from the shielding portion (shielding surface) 3h of the first barrier blade 3 The distance to the bonding surface 1j of the barrier holding frame 1 is small. On the other hand, as described above, by lowering the non-sliding surface 2j of the barrier driving ring 2 and the intrusion portion 3j of the first barrier blade 3 without increasing the thickness of the barrier holding frame 1 in the optical axis direction. The adhesive surface 1j can be formed.

  As described above, in the barrier device according to the present embodiment, since the bonding surface of the barrier holding frame can be formed even on the front side of the connecting portion between the barrier blades, the bonding area can be increased without increasing the lens barrel diameter. Can do. As a result, the lens barrel can be reduced in size and the adhesive strength between the barrier cover and the barrier holding frame can be increased.

  Further, in the barrier device according to the present embodiment, since the intrusion hole can be formed by using the slide structure for forming the position restricting hole of the barrier driving ring that has been adopted before, the type of the barrier holding frame The structure is not complicated and the cost is not increased.

  Further, in the barrier device according to the present embodiment, the barrier driving ring is formed with high accuracy without impairing the stability of the position of the barrier driving ring in the optical axis direction by forming the intrusion hole and the position restricting hole out of phase. As a result, the opening / closing accuracy of the barrier blades can be kept high.

  In the barrier device according to the present embodiment, the first barrier blade is a resin component, and the second barrier blade and the third barrier blade are metal components. For example, all the barrier blades may be resin parts.

  In this case, since the thickness in the optical axis direction is larger than that of the metal part, there is a possibility that the bonding surface of the barrier holding frame can be formed only by the operation region in the optical axis direction of the second barrier blade and the third barrier blade. . For this reason, it is not always necessary to lower the sliding surface of the barrier drive ring and the entry portion of the first barrier blade from the sliding surface and the shielding portion.

  Furthermore, in the barrier device according to the present embodiment, a set of three barrier blades is used, but the present invention can also be applied to a barrier device including a set of two or more barrier blades.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 1 Barrier holding frame 1j Adhesion surface 1k Position control hole 1m Intrusion hole 2 Barrier drive ring 2h Sliding surface 2j Non-sliding surface 3-5 Barrier blade 3e Control part 3h Shielding part 3j Intrusion part

Claims (9)

A barrier cover disposed on the object side in the optical axis direction of the imaging lens and formed with an incident aperture for allowing light to enter the imaging lens is superimposed on an open state that opens the incident aperture, and in a closed state that blocks the incident aperture A lens barrel that includes a first barrier member and a second barrier member that are unfolded to protect the imaging lens,
A barrier driving member for driving the first barrier member and the second barrier member;
A barrier holding member that holds the barrier driving member and has an adhesive surface for adhering and holding the barrier cover on the subject side in the optical axis direction,
An entry hole is formed in the barrier holding member on the image surface side of the adhesive surface ,
The first barrier member has a restricting portion for restricting a movement range of the second barrier member and a shielding portion for shielding the incident opening,
The barrier driving member is formed with a first surface which is a sliding surface with the first barrier member, and a second surface including an operating range of the restricting portion is formed. The surface is located closer to the subject in the optical axis direction than the second surface,
The shielding part of the first barrier member is formed closer to the subject side in the optical axis direction than the intrusion part that is a part of the restriction part,
The lens barrel, wherein the intrusion portion enters the intrusion hole with the opening operation of the first barrier member. The lens barrel according to claim 1 , wherein a gap is formed between the intrusion portion and the second surface in an optical axis direction of the imaging lens. The barrier holding member is formed with a position regulating hole for regulating the position of the barrier driving member in the optical axis direction,
The lens barrel according to claim 1 or 2, characterized in that it is formed out of phase with each other and the penetration hole and the position restricting hole. The lens barrel according to any one of claims 1 to 3 , wherein an inclined surface that is inclined toward the distal end side is formed at least at the distal end portion of the intrusion portion. The lens barrel according to any one of claims 1-4 wherein the second surface, characterized in that it comprises the operation range of the penetration portion. The second barrier member has a shielding portion for shielding the incident opening,
The intrusion part of the first barrier member is covered with a shielding part of the second barrier member when the first barrier member and the second barrier member are in the closed state. The lens barrel according to any one of 1 to 5 . A barrier cover disposed on the object side in the optical axis direction of the imaging lens and formed with an incident aperture for allowing light to enter the imaging lens is superimposed on an open state that opens the incident aperture, and in a closed state that blocks the incident aperture A lens barrel that includes a first barrier member and a second barrier member that are unfolded to protect the imaging lens,
A barrier driving member for driving the first barrier member and the second barrier member;
A barrier holding member that holds the barrier driving member and has an adhesive surface for adhering and holding the barrier cover on the subject side in the optical axis direction,
An entry hole is formed in the barrier holding member on the image surface side of the adhesive surface,
The first barrier member has a restricting portion for restricting a movement range of the second barrier member;
An inclined surface that is inclined toward the distal end side is formed at least at the distal end portion of the intrusion portion that is a part of the restricting portion, and the intrusion portion enters the intrusion hole with the opening operation of the first barrier member. A lens barrel characterized by that. A barrier cover disposed on the object side in the optical axis direction of the imaging lens and formed with an incident aperture for allowing light to enter the imaging lens is superimposed on an open state that opens the incident aperture, and in a closed state that blocks the incident aperture A lens barrel that includes a first barrier member and a second barrier member that are unfolded to protect the imaging lens,
A barrier driving member for driving the first barrier member and the second barrier member;
A barrier holding member that holds the barrier driving member and has an adhesive surface for adhering and holding the barrier cover on the subject side in the optical axis direction,
An entry hole is formed in the barrier holding member on the image surface side of the adhesive surface,
The first barrier member has a restricting portion for restricting a movement range of the second barrier member;
The second barrier member has a shielding part for shielding the incident opening,
An intrusion part that is a part of the restricting part enters the intrusion hole with the opening operation of the first barrier member, and the first barrier member and the second barrier member are in the closed state The lens barrel, wherein the intrusion portion of the first barrier member is covered with a shielding portion of the second barrier member. The imaging device provided with the lens barrel of any one of Claims 1-8 .

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