JP3445378B2 - Zoom lens barrel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom lens barrel capable of manually or electrically switching a zooming operation.

[0002]

2. Description of the Related Art Generally, a zoom lens barrel capable of manually or electrically switching a zooming operation generally has a zoom driving ring rotatably supported on a fixed barrel and a rotation of the zoom driving ring. A lens moving mechanism that moves at least one lens in the optical axis direction to change the zoom magnification, a zoom drive ring driving gear that rotates the zoom driving ring, and a lens that is rotatable outside the zoom driving ring. An electric zoom gear, which is arranged in an annular space between the zoom operating ring and the zoom operating ring so as to be movable in the axial direction, and transmits the power of the motor to the zoom driving ring driving gear. And a mechanism. A connecting mechanism is provided for connecting the zoom driving ring driving gear and the electric zoom gear mechanism in a state where the zoom operating ring is slid to one side in the optical axis direction. A zoom lever or the like is provided that directly connects the zoom operation ring and the zoom drive ring in a state of sliding to the other side in the axial direction. When the zoom operation ring is rotated while the zoom operation ring is slid to the other side in the optical axis direction, the zoom drive ring rotates integrally with the zoom operation ring, and the front lens and the rear lens move in the optical axis direction. And a manual zoom operation is performed.

[0003]

However, in such a conventional structure, since the zoom operation ring and the zoom drive ring are directly connected by the zoom lever at the time of manual zooming, the zoom operation ring is rotated at the time of zoom operation. The zoom lever rotates together with the ring together with the zoom operation ring. Therefore, it is necessary to secure a space within a range in which the zoom lever is rotationally moved in an annular space between the zoom drive ring and the zoom operation ring, and an electric component, a motor, a gear, etc. that constitute the electric zoom gear mechanism. There was a problem that the installation space of was limited. Also, when switching from manual zoom to electric zoom, a release mechanism is required to release the direct connection between the zoom drive ring and the zoom operation ring by the zoom lever, but this release mechanism has a complicated structure and is troublesome to assemble. There was a problem. The present invention has been devised in view of the above circumstances, and an object of the present invention is to reliably switch from manual zoom to electric zoom and to switch from electric zoom to manual zoom with a simple structure. An object of the present invention is to provide a zoom lens barrel that can be arranged without securing a large space in an annular space between the zoom drive ring and the zoom operation ring, and can make the camera compact.

[0004]

In order to achieve the above object, the present invention comprises a zoom drive ring rotatably supported on a fixed barrel, and at least one lens linked to the rotation of the zoom drive ring. A lens moving mechanism that moves in the optical axis direction to change the zoom magnification, a zoom driving ring driving gear that rotates the zoom driving ring, and a lens that is rotatable outside the zoom driving ring and movable in the optical axis direction. has a zoom operation ring that is an electric zoom gear mechanism for transmitting the power of the motors to the zoom drive ring driven gear, a gear that meshes with the teeth formed on the inner peripheral portion of the zoom operation ring, a manual zoom gear mechanism for transmitting the rotational force of the zoom operation ring to the zoom drive ring driving gear, with the front Symbol zooming operation ring is slid to one side of the optical axis direction, and the zoom driving ring driving gear The electricity The zoom drive ring drive gear is connected to the zoom gear mechanism, the manual zoom gear mechanism is disconnected from the zoom drive ring drive gear, and the zoom operation ring is slid to the other side in the optical axis direction. And the electric zoom gear mechanism is released, and a gear switching mechanism that connects the manual zoom gear mechanism and the zoom drive ring drive gear is provided, and the zoom drive mechanism is provided.
An annular space is formed between the ring and the zoom operation ring.
The annular space has a front bearing plate extending in the circumferential direction of the annular space.
The rear bearing plate and the front bearing plate are spaced apart from each other in the optical axis direction.
Electric zoom gear mechanism and manual zoom gear mechanism and gear cutting
The replacement mechanism includes the front bearing plate and the rear bearing plate in the annular space.
It is characterized in that it is arranged between .

According to the present invention, a zoom driving ring driving gear is provided on the zoom driving ring driving shaft, and the manual zoom gear mechanism is integrated with the zoom driving ring driving shaft on the zoom driving ring driving shaft. It is characterized in that it is provided with a first gear which is rotatably arranged and which is capable of meshing with a gear which meshes with a tooth portion of an inner peripheral portion of the zoom operation ring. Further, in the present invention, a zoom drive ring drive gear is provided on the zoom drive ring drive shaft, and the gear switching mechanism is axially movable to the zoom drive ring drive shaft and A second gear, which is integrally rotatably disposed and is connectable to the electric zoom gear mechanism, is provided. Further, according to the present invention, a zoom drive ring drive gear is provided on the zoom drive ring drive shaft, and the manual zoom gear mechanism is rotatable integrally with the zoom drive ring drive shaft on the zoom drive ring drive shaft. A gear that is meshable with a gear that is arranged and meshes with a tooth portion of an inner peripheral portion of the zoom operation ring;
A second gear that is disposed on the zoom drive ring drive shaft so as to be movable in the axial direction and rotatable integrally with the zoom drive ring drive shaft, and that is connectable to the electric zoom gear mechanism;
The gear switching mechanism includes a gear that meshes with a tooth portion of an inner peripheral portion of the zoom operation ring and a zoom lever that moves the second gear in the axial direction in association with sliding of the zoom operation ring in the optical axis direction. It is characterized by

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a half sectional side view of a zoom lens barrel according to an embodiment, FIG. 2 is an electric zoom gear mechanism during electric zoom,
Development view of manual zoom gear mechanism and gear switching mechanism, FIG.
FIG. 4 is a development view of a manual zoom gear mechanism and a gear switching mechanism at the time of manual zoom, and FIG. 4 is a front view of a main part of the zoom lens barrel according to the embodiment. In FIG. 1, 1 is a zoom lens barrel,
Reference numeral 3 denotes an optical axis thereof, and reference numerals 5 and 7 denote a front lens group and a rear lens group which form a zoom lens. The front lens group 5 is held by a front moving frame 9 and the rear lens group 7 is held by a rear moving frame 11. ing.

The zoom lens barrel 1 is a fixed barrel 1 disposed inside.
3, an outer cylinder 15 arranged outside the fixed cylinder 13, a zoom drive ring 17, a zoom operation ring 19, and the like. Fixed cylinder 1
A zoom drive ring 17 is rotatably connected to the outer peripheral surface of 3,
An outer cylinder 15 is arranged on the outside in the radial direction, and the zoom drive ring 1
Toothed portions 1701 are formed on the outer peripheral surface of 7. Outer cylinder 1
Reference numeral 5 denotes a large diameter portion 1501 and a small diameter portion 150 which is connected to the large diameter portion 1501 via an annular plate portion 1503 and is arranged with a gap secured between the rear outer peripheral surface of the zoom drive ring 17.
It is composed of 5 and 5. The rear end of the fixed barrel 13 and the rear end of the zoom drive ring 17 are housed in the step portion 1507 at the rear end of the outer barrel 15, and the mount joint ring 21 is connected to the rear end of the outer barrel 15. 21 on the outer peripheral surface of the rear part of the diaphragm ring 2
3 is rotatably arranged, a mount 25 is connected to the rear surface of the mount joint ring 21, and a protection ring 27 is connected to the inside of the mount 25.

The zoom operation ring 19 is arranged rotatably and axially movable along the rear end outer peripheral surface of the large diameter portion 1501 of the outer cylinder 15 and the front outer peripheral surface of the mount joint ring 21. The front portion of the zoom drive ring 17 extends forward of the fixed barrel 13, and the front moving frame drive ring 3 is provided on the outer peripheral surface of the front portion.
1 is attached, and a tooth portion 3101 is formed on the outer peripheral surface of the front moving frame drive ring 31. Large diameter part 1501 of outer cylinder 15
A focus ring 33 is attached to the front part of the, and a cam groove 3301 is formed on the inner peripheral surface of the focus ring 33.

A projection 901 that engages with the cam groove 3301 of the focus ring 33 is formed on the outer peripheral portion of the front moving frame 9, and the front moving frame drive ring 3 is formed on the inner peripheral surface of the outer peripheral portion.
A tooth portion 903 that meshes with the first tooth portion 3101 is formed. Cam grooves 1301 and 1703 are formed on the fixed barrel 13 and the zoom drive ring 17, respectively, and a projection 1101 formed on the outer peripheral portion of the rear moving frame 11 is provided on both cam grooves 1301 and 1703.
It is engaged over 703. Therefore, when the zoom drive ring 17 rotates, the front moving frame 9 rotates via the tooth portions 903 and 3101, and at this time, the protrusion 901 causes the cam groove 330 to move.
1 by which the front moving frame 9 and the front lens group 5 are guided.
Moves in the optical axis direction. When the zoom drive ring 17 rotates, the cam groove 1301 of the fixed barrel 13 and the zoom drive ring 1
The portion of 7 that overlaps the cam groove 1703 is displaced, and the projection 1101 is guided to the portion of the cam grooves 1301 and 1703 that overlap, whereby the rear moving frame 11 and the rear lens group 7 move in the optical axis direction. That is, when the zoom driving ring 17 rotates, the front lens group 5 and the rear lens group 7 move in the optical axis direction to perform a zoom operation.
3101, protrusion 901, cam groove 3301, protrusion 110
1. The zoom drive ring 17 is formed by the cam grooves 1301 and 1703.
A lens moving mechanism 34 is configured to move the front lens group 5 and the rear lens group 7 in the optical axis direction in conjunction with the rotation of the lens to change the zoom magnification.

An annular plate portion 15 is provided outside the small diameter portion 1505 of the outer cylinder 15 in the radial direction and inside the zoom operating ring 19 in the radial direction.
03 and the ring space 35 closed by the mount ring 21
And the front bearing plate 37 that extends in the circumferential direction of the annular space 35 on the annular plate portion 1503 and the mount joint ring 21 side.
A rear bearing plate 39 is provided, and spindles 41 and 43 are stretched around both ends of the bearing plates 37 and 39 in the circumferential direction, as shown in FIG. The bearing plate 3 is provided in the annular space 35.
A zoom drive ring driving shaft 45, an electric zoom gear mechanism 47, a manual zoom gear mechanism 48, and a gear switching mechanism 49 are provided via 7, 39, and a zoom motor 51 is provided.

The electric zoom gear mechanism 47 includes the bearing plate 3
The first shaft 55, the second shaft 57, and the third shaft 59, which are supported by 7, 39, are used to drive the zoom motor 51 with the power of the front bearing plate 3.
7 through the gear train 61 arranged in front of the first shaft 5
5 is transmitted. The gear 63 is attached to the first shaft 55.
5, which is integrally rotatably and axially movable,
The gear 63 is biased forward by a coil spring 65.

A first gear 67 is fixed to the second shaft 57,
The second gear 69 and the third gear 71 are rotatably arranged. Each of the first, second and third gears 67, 69, 71
Respectively include large diameter gears 67A, 69A, 71A and small diameter gears 67B, 69B, 71B, and the large diameter gear 67A of the first gear 67 meshes with the gear 63 of the first shaft 55.
In the figure, 73 is an encoder, and the encoder 73 is a second
It is composed of a slit plate 7301 attached to the end of the shaft 57, a case 7303 for supporting the light emitter and the light receiver at positions sandwiching the slit plate 7301, and the like, and the case 7303 is attached to the rear bearing plate 39.

On the third shaft 59, the first, second and third gears 7 are provided.
5, 77 and 79 are rotatably arranged, and the first and second gears 75 and 77 respectively include large diameter gears 75A and 77A and small diameter gears 75B and 77B. Then, the second shaft 57
The small diameter gear 67B of the third shaft 59 meshes with the large diameter gear 75A of the first gear 75 of the third shaft 59, and the large diameter gear 69A of the second shaft 57 and the third gear 59A
The small diameter gear 75B of the first gear 75 of the shaft 59 meshes with the second gear 75B.
The small diameter gear 69B of the shaft 57 meshes with the large diameter gear 77A of the second gear 77 of the third shaft 59, and the large diameter gear 71A of the second shaft 57 is engaged.
And the small diameter gear 77B of the second gear 77 of the third shaft 59 meshes with each other, and the small diameter gear 71B of the second shaft 57 meshes with the third gear 79 of the third shaft 59. Therefore, by the gears 67, 69, 71, 75, 77 of the second shaft 57 and the third shaft 59,
The power of the zoom motor 51 is decelerated to reduce the power of the third shaft 59 to the third position.
A deceleration mechanism that outputs to the gear 79 is configured.

A zoom drive ring drive gear 81 which meshes with the tooth portion 1701 is attached to a portion of the front end of the front bearing plate 37 where the zoom drive ring drive shaft 45 projects. A first gear 83 is fixed to the zoom drive ring driving shaft 45, and a tubular body 85 is rotatably and axially movably coupled to the zoom drive ring driving shaft 45. Further, an end surface of the tubular body 85 contacts the tubular body 85. The second gear 8 is biased by the coil spring 87.
The zoom driving ring driving shaft 45 is integrally rotatable with the zoom driving ring driving shaft 45 and movable in the axial direction.

The manual zoom gear mechanism 48 and the gear switching mechanism 49 are provided with a first shaft 90, the support shaft 43, the first and second gears 83, 89 and the like. The support shaft 43
A tubular member 91 is coupled to the shaft movably in the axial direction. The tubular member 91 includes a first zoom lever 9101 and a second zoom lever 9101.
A zoom lever 9103 is provided so as to project. The first zoom lever 9101 is provided with a groove 19 in the inner peripheral portion of the zoom operation ring 19.
01, and the groove 1901 is formed to extend in the circumferential direction by a predetermined length. Therefore, when the zoom operation ring 19 is moved in the optical axis direction, the tubular member 91 moves integrally therewith. Even when the zoom operation ring 19 is rotated, the first zoom lever 9101 remains only in the groove 1901 and the tubular member 91 does not rotate. A front concave portion 9111 and a rear concave portion 9113 are formed on the outer peripheral surface of the tubular member 91 at intervals in the axial direction, and the protrusions of the spring plate 93 attached to the rear bearing plate 39 are formed in the concave portions 9111 and 9113. The protrusion 9301 of the spring plate 93 is engageable with the recess 9111, 9
The position of the tubular member 91 is held by engaging with the 113, and the spring plate 93 and the recesses 9111, 9
A click mechanism is constituted by 113.

A gear 95 is coupled to the first shaft 90 so as to be rotatable integrally with the first shaft 90 and axially movable, and the gear 95 is biased rearward by a coil spring 97. A cylinder 99 is movably coupled to the first shaft 90 in the axial direction, and the end surface of the gear 95 is positioned by contacting the end surface of the cylinder 99. The gear 95 includes a large-diameter gear 95A and a small-diameter gear 95B. The large-diameter gear 95A can mesh with a tooth portion 1903 formed on the inner peripheral portion of the zoom operation ring 19, and the small-diameter gear 95B drives the zoom drive ring. It can be meshed with the first gear 83 of the shaft 45.

The second zoom lever 9103 engages with the tubular body 99 and the tubular body 85 of the zoom drive ring driving shaft 45,
When the zoom operation ring 19 is moved in the axial direction, the cylindrical bodies 85 and 99 are moved in the axial direction integrally with the zoom operation ring 19. Then, as shown in FIG.
When the zoom operation ring 19 is slid forward, the rear concave portion 9113 and the projection 9301 of the spring plate 93 are engaged with each other, and the zoom operation ring 19 becomes the electric zoom position. At this position, the zoom drive ring drive shaft 45 The first gear 83 and the small-diameter gear 95B of the first shaft 90 are separated from each other in the axial direction, and the second gear 89 of the zoom drive ring driving shaft 45 and the third gear 79 of the third shaft 59 mesh with each other. . Further, as shown in FIG. 3, when the zoom operation ring 19 is slid backward, the front concave portion 9111 and the projection 9301 of the spring plate 93 are engaged, and the zoom operation ring 19 becomes the manual zoom position. The second gear 89 of the zoom driving ring driving shaft 45 and the third gear 79 of the third shaft 59 are separated from each other in the axial direction, and the first gear 83 of the zoom driving ring driving shaft 45 and the small diameter gear 95 of the first shaft 90 are separated.
B is configured to mesh.

Therefore, in the embodiment, the manual zoom gear mechanism 48 for transmitting the rotational force of the zoom operation ring 19 to the zoom drive ring drive gear 81 has a tooth portion 19 of the zoom operation ring 19.
03, large diameter gear 95A, small diameter gear 95B, first gear 83
It is composed by. Also, the gear switching mechanism 49
Is composed of first and second zoom levers 9101 and 9103, a coil spring 97, a gear 95, cylindrical bodies 99 and 85, a coil spring 87, and a second gear 89.

Since the present embodiment is constructed as described above, when the zoom operating ring 19 is slid to the electric zoom position as shown in FIG. 2, the second gear 89 and the third gear 89 of the zoom driving ring driving shaft 45 and the third gear 89 are moved. The third gear 79 of the shaft 59 meshes. Here, if an electric zoom switch (not shown) is operated, the zoom motor 51 is driven, and the power of the zoom motor 51 is transmitted through the gear train 61, the gears 67, 69, 71, 75, 77 to the third shaft 59. Is transmitted from the third gear 79 to the second gear 89 of the zoom drive ring drive shaft 45 to rotate the zoom drive ring drive shaft 45. When the zoom drive ring drive shaft 45 is rotated, the zoom drive ring drive gear 81 and the tooth portion 17 are rotated.
The zoom drive ring 17 is rotated via 01. And
When the zoom drive ring 17 is rotated, the front lens group 5 and the rear lens group 7 move in the optical axis direction, and an electric zoom operation is performed.

Further, as shown in FIG. 3, the zoom operation ring 1
9 is slid to the manual zoom position, the first gear 83 of the zoom drive ring driving shaft 45 and the small diameter gear 9 of the first shaft 90 are moved.
5B meshes. Here, when the zoom operation ring 19 is rotated, the tooth portion 1903 of the zoom operation ring 19 and the large diameter gear 95 are rotated.
The rotational force of the zoom operation ring 19 is transmitted to the zoom drive ring drive shaft 45 via A, the small diameter gear 95B, and the first gear 83, and the zoom drive ring drive shaft 45 is rotated. When the zoom drive ring drive shaft 45 is rotated, the zoom drive ring 17 is rotated via the zoom drive ring drive gear 81 and the tooth portion 1701, and the front lens group 5 and the rear lens group 7 are moved in the optical axis direction. Then, the manual zoom operation is performed.

Therefore, according to this embodiment, the annular space 35
A manual zoom gear mechanism 48 and a gear switching mechanism 49 are arranged in the zoom drive ring 17, and in particular, the zoom drive ring 17 is rotated by the gear mechanism even during manual zooming. Second zoom arm 91
No need to rotate 01, 9103, so
There is no need to secure a large space in the annular space 35 for rotating the zoom lever as in the conventional case,
This is advantageous in arranging the electrical components that make up the electric zoom gear mechanism and various parts such as the motor and the gear, and allows the camera to be made compact.

[0022]

As is apparent from the above description, the present invention is
A zoom drive ring rotatably supported on a fixed barrel, a lens moving mechanism that moves at least one lens in the optical axis direction in association with the rotation of the zoom drive ring to change the zoom magnification, and the zoom drive. a zoom drive ring driving gear for rotating the ring, the the zoom operation ring that is movably disposed rotatable and the optical axis direction outside of the zoom driving ring, the power of the M o <br/> data zoom An electric zoom gear mechanism that is transmitted to a drive ring driving gear, and a gear that meshes with a tooth portion formed on an inner peripheral portion of the zoom operating ring are provided, and the rotational force of the zoom operating ring is driven by the zoom driving ring driving gear. transmitted to the manual zoom gear mechanism, with the front Symbol zooming operation ring is slid to one side of the optical axis direction, thereby connecting the said zoom drive ring driving gear electric zoom gear mechanism, the manual zoom gear motor And the zoom drive ring drive gear are disconnected, and the zoom drive ring drive gear and the electric zoom gear mechanism are disconnected while the zoom operation ring slides to the other side in the optical axis direction. And a gear switching mechanism that connects the manual zoom gear mechanism and the zoom drive ring driving gear to each other.
An annular space is formed between the ring and the annular space,
A front bearing plate and a rear bearing plate extending in the circumferential direction of the annular space,
The electric zoom is arranged at intervals in the optical axis direction.
The gear mechanism, manual zoom gear mechanism and gear switching mechanism
It is arranged between the front bearing plate and the rear bearing plate in the annular space.
It was Therefore, it is obvious that the manual zoom gear mechanism and the gear switching mechanism with a simple structure can surely switch from the manual zoom to the electric zoom and from the electric zoom to the manual zoom. It can be arranged without securing a large space in the annular space between the ring and the camera, and the camera can be made compact.

[Brief description of drawings]

FIG. 1 is a half sectional side view of a zoom lens barrel according to an embodiment.

FIG. 2 is a development view of an electric zoom gear mechanism, a manual zoom gear mechanism, and a gear switching mechanism during electric zoom.

FIG. 3 is a development view of a manual zoom gear mechanism and a gear switching mechanism during manual zoom.

FIG. 4 is a front view of a main part of the zoom lens barrel according to the embodiment.

[Explanation of symbols]

1 zoom lens barrel 5 front lens group 7 Rear lens group 13 Fixed tube 17 Zoom drive ring 19 Zoom operation ring 34 Lens moving mechanism 35 annular space 45 Zoom drive ring drive shaft 47 Electric zoom gear mechanism 48 Manual zoom gear mechanism 49 Gear switching mechanism 81 Zoom drive ring drive gear

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-34563 (JP, A) JP-A-3-233418 (JP, A) JP-A-4-344607 (JP, A) JP-A-3- 233419 (JP, A) JP-A-63-113512 (JP, A) JP-A-63-237018 (JP, A) Jitsukaihei 3-8307 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G02B 7/08 G02B 7/04

Claims (4)

(57) [Claims] 1. A zoom drive ring rotatably supported on a fixed barrel, and a lens moving mechanism for changing at least one lens in the optical axis direction in association with the rotation of the zoom drive ring to change the zoom magnification. When the zoom drive ring driving gear for rotating the zoom driving ring, and the zoom operation ring is movably disposed in a rotatable and the optical axis direction outside of the zoom driving ring, the power of the motors the An electric zoom gear mechanism for transmitting to a zoom driving ring driving gear, and a gear that meshes with a tooth portion formed on an inner peripheral portion of the zoom operating ring are provided, and the rotational force of the zoom operating ring is used for driving the zoom driving ring. a manual zoom gear mechanism for transmitting to the gear, the pre-Symbol zoom operation ring while sliding to one side of the optical axis direction, connecting to the zoom drive ring drive gear and the electric zoom gear mechanism, the manual With the zoom gear mechanism and the zoom drive ring drive gear disconnected, the zoom drive ring slides to the other side in the optical axis direction, and the zoom drive ring drive gear is disconnected from the electric zoom gear mechanism. And a gear switching mechanism that connects the manual zoom gear mechanism and the zoom drive ring driving gear.
And an annular space is formed between the zoom drive ring and the zoom operation ring.
And a front shaft extending in the circumferential direction of the annular space.
The receiving plate and the rear bearing plate are arranged with a space in the optical axis direction.
The electric zoom gear mechanism, manual zoom gear mechanism and gear
The replacement mechanism includes the front bearing plate and the rear bearing in the annular space.
A zoom lens barrel characterized by being arranged between plates . 2. A zoom drive ring drive gear is provided on a zoom drive ring drive shaft, and the manual zoom gear mechanism is rotatably arranged on the zoom drive ring drive shaft integrally with the zoom drive ring drive shaft. The first gear that is meshable with a gear that is provided and meshes with a tooth portion of an inner peripheral portion of the zoom operation ring.
The described zoom lens barrel. 3. A zoom drive ring drive gear is provided on a zoom drive ring drive shaft, and the gear switching mechanism is axially movable to the zoom drive ring drive shaft and is integral with the zoom drive ring drive shaft. The zoom lens barrel according to claim 1, further comprising a second gear rotatably disposed in the electric zoom gear mechanism. 4. A zoom drive ring drive gear is provided on a zoom drive ring drive shaft, and the manual zoom gear mechanism is rotatably arranged on the zoom drive ring drive shaft integrally with the zoom drive ring drive shaft. A first gear that is provided and is meshable with a gear that meshes with a tooth portion of an inner peripheral portion of the zoom operation ring, wherein the gear switching mechanism is axially movable to the zoom drive ring drive shaft A second gear that is rotatably disposed integrally with the drive shaft and that is connectable to the electric zoom gear mechanism is provided. Further, the gear switching mechanism is a gear that meshes with a tooth portion of an inner peripheral portion of the zoom operation ring. The zoom lens barrel according to claim 1, further comprising: a zoom lever that moves the second gear in the axial direction in association with sliding of the second operation ring in the optical axis direction.