JPH09145978A - Lens barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately grasp the operating conditions of a lens barrel while an image to be picked up is caught through a finder. SOLUTION: This lens barrel 1 is provided with a focus operation ring 11, a zoom operation ring 12, and a zoom operation ring 13 operating the focus, the zoom and the iris of the lens barrel as they are rotated with respect to the lens barrel 1. The operation rings 11 and 12 are respectively provided with projections 11c and 12c at parts corresponding to a scale 11b and a scale 12b. The operation ring 13 has a projection obtained by embossing a close scale 13b itself. A photographer recognizes the positions of the projections 11c, 12c and 13b by the sense of touch while looking in the finder, and grasps the current operating conditions by the operation rings of the lens barrel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display of an operation state of an optical state of a lens barrel of a camera such as a handy video camera.

[0002]

2. Description of the Related Art For example, as shown in FIG. 9, a conventional lens barrel of a handy video camera has a structure in which a servo mechanism 22 of the camera is connected to the barrel 1. Also, the lens barrel
Reference numeral 1 denotes a focus operation ring 1 for adjusting the focus, zoom and iris of the lens barrel as the lens barrel 1 rotates.
1. A zoom operation ring 12 and an iris operation ring 13 are provided. Each of the operation rings has a current focus, zoom,
Scales (letters and symbols) for displaying the status of the iris
Is attached. Here, the index line 1 attached to the lens barrel 1
The memory at positions 4 and 15 is the current focus, zoom, and iris state (shooting distance, focal length, aperture value, etc.)
Is shown. This index line is normally provided diagonally to the left when viewed from the camera side so as not to cause confusion during confirmation between different lens models.

Each operating ring 11, 12, 13 is a gear having a plurality of teeth on its outer peripheral surface and rotated by a servo mechanism 22. In the figure, as an example, the zoom control switch 221 used by the photographer when the zoom operation ring 11 is rotated by the servo mechanism is shown. Here, each operating ring 11, 12, 13 can also be rotated manually, and the teeth on the outer peripheral surface of each operating ring 11, 12, 13 also play a role of slipping when manually rotating. There is.

In addition to this, a focus ring anti-slip member 26 is provided on the focus operation ring 11 and a zoom ring anti-slip member 27 is provided on the zoom operation ring 12 for slipping during the manual rotation operation of the operation ring. It may be provided.

Next, the outer side 2a of the servo mechanism has a shape that can be held, and at the time of photographing, by operating the operating portion with the left hand while holding the outer side 2a of the servo mechanism with the right hand, focus, zoom, and iris can be obtained. It is common to adjust the operating conditions of the lens barrel such as.

Here, the angle of view of the lens barrel is usually adjusted by a zoom operation, but the angle of view is also changed by a focus operation. In addition, in the case of a lens barrel used in a handy camera, the front lens diameter is not made large from the viewpoint of maneuverability, so when zooming from the wide side to the tele side, the effective diameter of the front lens becomes insufficient and the release F value becomes large. It is known that a phenomenon of increasing (called ramping) occurs. Further, when the teleconverter is built in, when the teleconverter is inserted, the focal length changes and at the same time, the F value of the lens also changes.

[0007]

Now, in order to grasp the operating conditions of the focus, zoom, diaphragm, etc. of such a conventional lens barrel, the eyes are moved from the viewfinder to the above-mentioned index line and scale portions. I needed to check. Note that it is very difficult and unrealistic to check the index line and the scale portion described above with the other eye while capturing the viewfinder image with one eye.

Although it is possible to estimate the operating condition of the lens barrel to some extent from the image displayed on the finder, it is usually difficult to accurately grasp the operating condition. That is, since the image displayed on the viewfinder includes influences such as a change in the angle of view due to ramping and focus and a change in the F value due to the insertion of the teleconverter, the situation of accurate operation of focus, zoom, diaphragm, etc. is shown. It was difficult to grasp, for example, it was difficult to take a planned shooting action while deciding how much focus, zoom, aperture, etc. can be operated while looking through the viewfinder.

As described above, conventionally, it has been difficult to accurately grasp the operating condition of the lens barrel by the operating ring while capturing the image captured by the viewfinder.

Therefore, it is an object of the present invention to provide a lens barrel and a camera capable of accurately grasping the operating state of the lens barrel by the operating ring while capturing an image taken by a viewfinder.

[0011]

To achieve the above object, the present invention provides a lens barrel used in a camera,
A lens barrel main body portion fixed to the camera, and an operation ring for operating the optical state of the lens barrel according to the rotation with respect to the lens barrel main body portion are provided, and the operation ring is provided on the outer peripheral surface of the operation ring. It is characterized in that a tactilely recognizable convex portion or a concave portion is provided which indicates an operating state of an optical state of the lens barrel by the operating ring depending on a position of the ring with respect to the lens barrel main body. A lens barrel is provided.

By providing such a convex portion or concave portion on the outer peripheral surface of the operating ring, the photographer recognizes the position of the convex portion or concave portion by the tactile sensation of the hand while looking through the viewfinder. It becomes possible to grasp the operation status.

Here, in such a lens barrel, the operation ring for the lens barrel main body is formed on the outer peripheral surface of the lens barrel main body by a convex portion or a concave portion that can be recognized by touch. An index indicating the reference position in the rotation direction of the rotation is provided. By doing this,
It becomes possible to recognize the relationship between the index of the lens barrel main body and the convex portion or the concave portion of the operating ring by a tactile sensation, and more accurately grasp the operating condition of the lens barrel. Further, in these lens barrels, the shape of the convex portion or the recessed portion provided on the operating ring is provided with a scale that represents one of the operating states of the lens barrel by a character or a symbol on the outer peripheral surface of the operating ring. The shape is formed on the upper surface so that the existing scale and the convex portion or the concave portion according to the present invention are commonly used.

Further, a plurality of convex portions or concave portions having different shapes are provided on the outer peripheral surface of the operating ring at different positions in the circumferential direction of the operating ring, and the positions and shapes of the plurality of convex portions or concave portions are formed. This makes it possible to grasp the operating status of the lens barrel more accurately and easily.

In order to achieve the above object, the present invention is a lens barrel used in a camera, wherein the lens barrel body is fixed to the camera, and the lens barrel is rotated with respect to the lens barrel body. An operating ring for operating the optical state of, on the outer peripheral surface of the operating ring, a plurality of protrusions or recesses are regularly arranged in the circumferential direction of the operating ring, and,
At least one of the plurality of protrusions or recesses has a different shape from the other plurality of protrusions or recesses.

According to such a lens barrel, a plurality of convex portions or concave portions arranged regularly in the circumferential direction of the operating ring realize slip prevention during manual operation of the operating ring, and the photographer can It is possible to grasp the current operating state of the lens barrel by observing the position of the convex portion or the concave portion having a shape different from that of the other plural convex portions or concave portions while looking through the viewfinder. .

It is to be noted that a non-slip member fixed to the operating ring in a state of being externally fitted to the operating ring is provided, and a plurality of regularly arranged circumferentially of the operating ring is provided on the outer peripheral surface of the operating ring. The convex portion or the concave portion may be formed by the shape of the outer peripheral surface of the anti-slip member.

Further, in this case, the non-slip member is fixed to the anti-slip member and the operation ring so that the anti-slip member is detachably fixed to any one of a plurality of circumferentially different positions of the operation ring. It has a mechanism. Accordingly, the relationship between the position of the convex portion or the concave portion having a shape different from that of the other plural convex portions or the concave portion and the rotation state of the operation ring can be arbitrarily changed according to the photographer's preference.

In order to achieve the above object, the present invention is a lens barrel used in a camera, comprising: a lens barrel main body fixed to the camera; and a lens barrel that rotates with respect to the lens barrel main body. An operating ring for operating the optical state of the operating ring, the operating ring having a plurality of teeth arranged so as to surround the outer periphery on the outer peripheral surface, the gear being rotated by a servo mechanism. Provides a lens barrel characterized by having a shape in which some of the teeth are regularly arranged all around the outer circumference of the gear.

According to such a lens barrel, the photographer can grasp the current operating state of the lens barrel by recognizing the position of the part lacking teeth by the tactile sensation of the hand while looking through the finder. . In addition, such a shape is
Since it can be formed by removing a part of the teeth that were conventionally provided on the operating ring, its processing is easy,
No special processing is required compared to the conventional method.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a lens barrel according to the present invention will be described below.

First, a first embodiment will be described.

FIG. 1 shows the configuration of the lens barrel according to the first embodiment.

As shown in the figure, the lens barrel according to the present embodiment has a structure in which a lens barrel 1 is connected to a servo mechanism 2 of a camera. The servo mechanism 2 can also be connected from the outside without being connected. In addition, the lens barrel 1 has a focus operation ring 11 for adjusting the focus, zoom, and iris of the lens barrel as the lens barrel 1 rotates.
A zoom operation ring 12 and an iris operation ring 13 are provided, and each operation ring is provided with a scale (characters or symbols) for displaying the current focus, zoom, and iris states. Here, the index line 14 attached to the lens barrel 1,
The scale at position 15 is the current focus, zoom,
The state of the iris (shooting distance, focal length, aperture value, etc.) is shown. This index line is provided diagonally to the left when viewed from the camera side so as not to cause confusion during confirmation between different lens models. Further, 26 is a focus ring anti-slip member. Since the camera body itself is the same as the conventional one, its illustration is omitted.

Each operating ring 11, 12, 13 is a gear which has a plurality of teeth 11a, 12a, 13a on its outer peripheral surface and which is rotated by the servo mechanism 2. Here, each operating ring 11, 12, 13 can also be rotated manually, and the teeth 11 on the outer peripheral surface of each operating ring 11, 12, 13 are rotated.
a, 12a and 13a also play a role of slipping when manually rotated. A zoom control switch 221 is used by the photographer when the zoom operation ring 12 is rotated by the servo mechanism.

In such a structure, in the first embodiment, each of the focus operation ring 11 and the zoom operation ring 12 is provided with a projection at a portion corresponding to one scale 11b, 12b. The focus operation ring 11 is located at a position on the index line 14 side of the infinite scale, and the zoom operation ring 12 is located at a position on the index line 14 side of the wide end scale.
Is provided. Further, the iris operating ring 13 has a closed scale itself 13b as a protruding protrusion.

By thus providing the projections on the outer peripheral surface of each operation ring, the photographer recognizes the projection positions 11c, 12c, 13b by the tactile sensation while removing the finder, and from this, the lens barrel by the current operation ring. You can grasp the operation status of.

Here, in the first embodiment as described above, as shown in the sectional view of the index portion of the lens barrel in FIG.
It is desirable that the index line 14 also has a convex shape.

By doing so, it is possible to more accurately grasp the operation status by the tactile sensation of the positional relationship between the index line 14 and the projections 11c and 12c of the operation rings 11 and 12. Of course, it is desirable that the index line 15 also has a convex shape.

In the first embodiment described above, recesses may be provided instead of the projections, or the scale itself may be recessed. Further, the positions of the protrusion and the protruding scale are not necessarily provided at the circumferential positions that coincide with the scale because it is sufficient that the angular relationship of the operating ring with respect to the lens barrel can be recognized. Further, in the example of FIG. 1, in each of the focus operation ring 11 and the zoom operation ring 12, a protrusion is provided at a portion corresponding to one scale 11b, 12b, and the iris operation ring 13 is a protrusion obtained by embossing the closed scale itself 13b. Instead of this, one scale of the focus operation ring 11 or the zoom operation ring 12 may be a raised protrusion, or a protrusion may be provided on a portion of the iris operation ring 13 corresponding to one scale. Further, in each operation ring, a protrusion or a recess may be provided at a position corresponding to a plurality of scales of the operation ring, or the plurality of scales themselves may be a protrusion or a recess.

The first embodiment of the present invention has been described above.

The second embodiment of the present invention will be described below.

The configuration of the lens barrel according to the second embodiment differs from the configuration of the lens barrel according to the first embodiment shown in FIG. 1 only in the structure of each operating ring.

FIG. 3 shows a cross section of the outer peripheral portion of the zoom operation ring 12 according to the second embodiment.

Although not shown in detail, the teeth 11a, 12a, 13a of each operating ring mesh with the gears in the servo mechanism 2 in the upper part of the drawing of FIG. The operation ring rotates with the rotation of. However, the rotation angle of each operation ring is limited to less than 360 degrees, and there is an angle range in which the gears in the servo mechanism 2 are never meshed even if teeth are provided all around the operation ring. Conventionally, the teeth provided in such a range do not substantially function as the teeth of the gear, but only serve as a slipper when the operating ring is manually rotated.

In the second embodiment, paying attention to such a range, among the teeth which are conventionally provided over the entire circumference on the outer peripheral side of the zoom operation ring 12, the gears of the servo mechanism 2 are engaged. A groove is formed by a shape in which a part of the teeth of the non-existing portion is omitted, and the operation ring can be grasped by a tactile sensation like the protrusion and the recess in the first embodiment described above.

In the example of FIG. 3, two grooves 12d and 12e of different widths are provided at positions left by θ ° at both ends from the range of engaging with the gear of the servo mechanism 2 in FIG.

Thus, the two grooves 1 are formed in the zoom operation ring 12.
In the case of arranging 2d and 12e, not only the rotation state of the zoom operation ring 12 can be grasped by touch, but also the remaining range in which zooming operation can be performed does not require visual confirmation of the scale, and the groove positions 12d and 12e are Depending on where you are, you can intuitively recognize naturally in a series of operations. Since the widths of the two grooves 12d and 12e are changed, it is possible to easily discriminate between the wide-side groove 12d and the tele-side groove 12e.

Further, the groove and the remaining teeth formed in this manner can sufficiently fulfill the role of a non-slip when the operating ring is manually rotated.

Further, since such a groove can be formed by removing a part of the teeth provided in the conventional operation ring, it is easy to process and requires special processing as compared with the conventional case. do not do.

The groove of the zoom operation ring 12 may be formed as shown in FIG.

FIG. 4 is a view showing a cross-section of the outer peripheral portion of the zoom operating ring 12, which is one of the teeth conventionally provided on the portion that does not mesh with the gear of the servo mechanism 2 of the camera. This is an example in which only the teeth at a plurality of positions (at the same position in the circumferential direction) corresponding to each of the plurality of graduated scales 12b are left and other parts are omitted. If this is done, the zoom operation ring rotation state can be
That is, it becomes possible to grasp the zoom operation status of the lens barrel by the tactile sensation.

In the case of the configuration shown in FIG. 4, all the teeth conventionally provided in the portion that does not mesh with the gears of the servo mechanism 2 of the camera are omitted, and the zoom operating ring 12 is provided. A protrusion or a recess may be provided at a position where a plurality of conventional teeth (at the same position in the circumferential direction) corresponding to each of the plurality of scales 12b were provided. Also,
At this time, it is preferable that these projections and depressions are shaped so as to sufficiently perform the function of slipping.

Further, in the above description of the second embodiment, the zoom operation ring 12 has been described as an example, but the focus operation ring 11 and the iris operation ring 13 are also similarly described.
The groove may be formed by a shape in which some of the teeth, which are not provided with the gear of the servo mechanism 2 of the camera, are omitted from the teeth that are conventionally provided over the entire circumference.

Further, in the above-described first and second embodiments, the configuration in which the zoom ring anti-slip member 27 is omitted is shown, but in the above first and second embodiments, the zoom ring is further added. You may make it provide the anti-slip member 27.

The third embodiment of the present invention will be described below.

FIG. 5 shows the configuration of the lens barrel according to the third embodiment.

The lens barrel shown in FIG. 5 is similar to the lens barrel shown in FIG. 9, and the focus operating ring 11, the zoom operating ring 12, the iris operating ring 13, the index lines 14, 1
5, a focus ring anti-slip member 26, a zoom ring anti-slip member 27, and the like.

In such a structure, the projections are regularly arranged on the focus ring anti-slip member 26 and the zoom ring anti-slip member 27. Further, in the third embodiment, the projections 26a and 27a on the focus ring anti-slip member 26 and the zoom ring anti-slip member 27 corresponding to the scales 11b and 12b are replaced with other projections on the anti-slip member. Has a different shape. That is, the focus ring anti-slip member 2
Protrusion 26a of another shape at a position corresponding to the infinite scale of 6
A projection 27a having a different shape is provided at a position corresponding to the wide end scale of the zoom ring anti-slip member 27. By recognizing the position of the protrusion having such a different shape by a tactile sensation, the photographer can know the operation state of the operation ring. However, the position of providing the protrusion of another shape is not necessarily required to be provided at the circumferential position that coincides with the scale because it is sufficient that the angular relationship of the operating ring with respect to the lens barrel can be recognized.

FIG. 6 shows a cross section of the zoom operation ring anti-slip member 27.

As shown in the figure, the zoom operation ring 12 is provided with a scale 12b, and further the slip prevention member 27 is
It is attached to its outer circumference. Any method can be used to fix the anti-slip member 27 to the zoom operation ring 12 as long as the position is not displaced, for example, fixing with screws, fixing with an adhesive, or press fitting. It is possible to use a method such as fixing by. If the anti-slip member 27 is an elastic member such as rubber or plastic, the elasticity may be used for fixing. In addition, a fitting portion may be provided on both for positioning the fixed position. If the anti-slip member 14 is an elastic member such as rubber or plastic, its elasticity may be used.

Here, the zoom operation ring anti-slip member 27 has been described as an example, but the focus ring anti-slip member 26 is similar to the zoom operation ring anti-slip member 27.

By the way, the above-mentioned projections of different shapes are provided with the focus ring anti-slip member 26 and the zoom operation ring anti-slip member 27.
A plurality of them may be provided respectively.

That is, for example, as shown in the cross section of FIG. 7, the zoom operation ring anti-slip member 27 may be provided with a plurality of different shaped protrusions 27b and 27c.

In the illustrated example, the protrusion 27b has a shape different from that of the other protrusions at positions left by θ ° at both ends from the entire zoom rotation angle (rotatable range of the zoom operation ring 12), and the mutual shapes are also different. , 27c are provided. When the different-shaped protrusion is provided at such a position, the remaining range in which the zooming operation can be performed can be more intuitively recognized than the positions of the two different-shaped protrusion positions 27b and 27c. Further, since the two different-shaped protrusions 27b and 27c have different shapes, it is easy to determine whether the wide-side different-shaped protrusion 27b or the tele-side different-shaped protrusion 27c is touched. It can be carried out.

Here, the zoom operation ring anti-slip member 27 has been described as an example, but the focus ring anti-slip member 26 is similar to the zoom operation ring anti-slip member 27.

Further, in the above description, the focus ring anti-slip member 26 has been described with respect to the zoom operation ring anti-slip member 27, but it can be similarly applied to the case where the iris operation ring 13 is provided with the anti-slip member.

Further, as shown in FIG. 2, the index 1
You may make 4 and 15 into a convex shape or a concave shape. By doing so, it is possible to sense the differently-shaped projection position and the index position on each anti-slip member by tactile sensation, and to grasp the operation status of the operation ring more finely from the mutual positional relationship. .

Further, the protrusion having a different shape from the other protrusions on the anti-slip portion may be a protrusion having a different height from the other protrusions, a protrusion having a different pattern, or a recess.

The third embodiment of the present invention has been described above.

The fourth embodiment of the present invention will be described below.

The configuration of the lens barrel according to the fourth embodiment is almost the same as the configuration of the lens barrel according to the third embodiment, and only the method of fixing each anti-slip member to the operation ring is different. different.

As shown in FIG. 8 as an example showing the cross section of the zoom ring anti-slip member 27, the zoom ring anti-slip member 27 is provided with a protrusion 27a having a different shape. Further, the zoom operation ring 27 is provided with two or more notches 12g on the circumference. On the other hand, the zoom ring anti-slip member 27 is made of an elastic member such as rubber, and is provided with an alignment protrusion 27d that fits with one notch 12g at one or more locations on its inner diameter side.

By fitting the notch 12g and the alignment protrusion 27d, the scale position on the zoom operation ring 12 and the position of the protrusion 27a having a different shape have a fixed relationship.

Further, by selecting the notch 12g into which the alignment protrusion 27d is fitted, the positional relationship between the scale and the different-shaped protrusion 27a can be arbitrarily set according to the preference of the user.

Since the anti-slip member 27 is an elastic member, it can be deformed without using a special tool to release the fitting between the alignment protrusion 27d and the notch 12g or to re-fit it. You can Therefore, the notch 12g and the alignment protrusion 27d can be fitted together.

Instead of the fitting of the alignment protrusion 27d and the notch 12g, a plurality of tap holes are provided in the operation ring, and the anti-slip member is fixed to the tap hole arbitrarily selected by screws. You may do it. Further, the anti-slip member may not be an elastic member as long as the operation ring and the anti-slip member have a mechanism in which they are fitted to each other by sliding in the optical axis direction.

Here, the zoom operation ring anti-slip member 27 has been described as an example, but the focus ring anti-slip member 26 is similar to the zoom operation ring anti-slip member 27. Further, it can be similarly applied to the case where the iris operation ring 13 is provided with a slip prevention member.

[0069]

As described above, according to the present invention, it is possible to accurately grasp the operation status of the optical state of the lens barrel while capturing the image captured by the viewfinder, and improve the operability. it can.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a lens barrel according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a portion including an index line portion of the lens barrel of the lens barrel according to the first embodiment of the present invention.

FIG. 3 is a sectional view of an outer peripheral portion of a first zoom operation ring according to a second embodiment of the present invention.

FIG. 4 is a sectional view of an outer peripheral portion of a second zoom operation ring according to the second embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a lens barrel according to a third embodiment of the present invention.

FIG. 6 is a sectional view of an outer peripheral portion of a first zoom operation ring according to a third embodiment of the present invention.

FIG. 7 is a sectional view of an outer peripheral portion of a second zoom operation ring according to a third embodiment of the present invention.

FIG. 8 is a sectional view of an outer peripheral portion of a zoom operation ring according to a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of a conventional lens barrel.

[Explanation of symbols]

 1 Lens barrel 2 Servo mechanism 2a Servo mechanism outside 11 Focus operating ring 12 Zoom operating ring 13 Iris operating ring 11a, 12a, 13a Gear 11b, 12b, 13b Scale 11c, 12c Protrusion 12d Wide side groove 12e Tele side groove 12g Notch 14, 15 Index line 26, 27 Anti-slip member 26a, 27a, 27b, 27c Different shape protrusion 27d Positioning protrusion 221 Zoom control switch

Claims (8)

[Claims] 1. A lens barrel used in a camera, comprising: a lens barrel main body fixed to the camera; and an operating ring for operating an optical state of the lens barrel with rotation of the lens barrel main body. On the outer peripheral surface of the operation ring, the position of the operation ring with respect to the lens barrel main body with respect to the rotation direction indicates the operation state of the lens barrel by the operation ring, recognizable by touch. A lens barrel having a convex portion or a concave portion. 2. The lens barrel according to claim 1, further comprising a convex portion or a concave portion that is recognizable by touch on the outer peripheral surface of the lens barrel main body with respect to the lens barrel main body. A lens barrel, wherein an index indicating a reference position in a rotation direction of rotation of an operation ring is provided. 3. The lens barrel according to claim 1, wherein the convex portion or the concave portion provided on the outer peripheral surface of the operating ring indicates one of the operating states of the lens barrel by a letter or a symbol. A lens barrel having a shape in which the scale represented by is formed on the outer peripheral surface of the operation ring. 4. The lens barrel according to claim 1, 2 or 3, wherein a plurality of convex portions or concave portions having different shapes are provided on the outer peripheral surface of the operating ring in the circumferential direction of the operating ring. A lens barrel characterized by being provided at different positions. 5. A lens barrel used in a camera, comprising: a lens barrel main body fixed to the camera; and an operating ring for operating an optical state of the lens barrel with rotation of the lens barrel main body. On the outer peripheral surface of the operating ring, a plurality of convex portions or concave portions are regularly arranged in the circumferential direction of the operating ring, and at least one of the plurality of convex portions or concave portions is A lens barrel having a shape different from that of the plurality of convex portions or concave portions. 6. A lens barrel used in a camera, comprising: a lens barrel main body fixed to the camera; and an operating ring for operating an optical state of the lens barrel with rotation of the lens barrel main body. Wherein the operating ring is a gear wheel provided with a plurality of teeth arranged so as to surround the outer circumference on the outer peripheral surface and rotated by a servo mechanism, wherein the gear wheel extends over the entire outer circumference of the gear wheel. A lens barrel having a shape in which some of the teeth arranged regularly are missing. 7. The lens barrel according to claim 5, further comprising a non-slip member fixed to the operation ring in a state where the operation ring is externally fitted to the operation ring, the operation ring being provided on an outer peripheral surface of the operation ring. A plurality of convex portions or concave portions arranged regularly in the circumferential direction of the lens barrel are formed by the shape of the outer peripheral surface of the anti-slip member. 8. The lens barrel according to claim 7, wherein the anti-slip member and the operation ring are provided with the anti-slip member at any of a plurality of positions different in the circumferential direction of the operation ring. A lens barrel, comprising a fixing mechanism for removably fixing to a position.