JPH0712964Y2 - Lens barrel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a lens barrel capable of automatic focus adjustment. More specifically, a manual lens moving operation mechanism for manually moving a movable lens unit movable in the optical axis direction, and an automatic lens moving operation mechanism for moving the movable lens unit by driving with a driving device are provided. The present invention relates to a lens barrel in which a lens moving operation mechanism is provided with a power transmission / interruption mechanism for intermittently transmitting power between a movable lens unit and a drive device.

[Conventional technology]

The lens barrel described above has, for example, a configuration in which it can be switched between an automatic focus adjustment state in which the moving lens unit is moved by a drive device and a manual focus adjustment state in which the moving lens unit is moved by a manual operation on a distance ring or the like. , In the manual focus adjustment state, the load on the manual lens movement operation mechanism is reduced by disconnecting the link between the drive unit and the moving lens unit, enabling smooth manual focus adjustment operation and stopping the drive. It is designed so that the device is not forced to operate.

In this type of lens barrel, a driven member that receives a driving force from a driving device and transmits the driving force to a moving lens unit is provided in a driving shaft center direction between a connecting position and a non-connecting position with the driving device. It is known that the position is switchable (see, for example, Japanese Utility Model Laid-Open No. 58-180537).

On the other hand, in a lens barrel capable of automatic focus adjustment by a driving device, specifically, it is desirable to reduce the load on the driving device such as a motor in terms of durability of the driving device and power consumption of the driving device. . Therefore, it is proposed that a member such as a ball having a small friction is interposed in a sliding contact portion which constitutes the automatic lens movement operation mechanism, and a load on the automatic lens movement operation mechanism during the lens movement operation by the drive device is reduced. (E.g.
(See Japanese Patent No. 187418).

[Problems to be solved by the invention]

However, the structure for reducing the load on the automatic lens moving operation mechanism at the time of lens moving operation by such a driving device is configured so that the manual focus adjustment described above is also possible, and particularly, the driving device and the moving lens unit in the manual focus adjusting state. There is a problem in applying it to the configuration that cuts off the interlocking of.

That is, since the manual lens movement operation mechanism and the automatic lens movement operation mechanism share a part of the configuration of the portion which directly acts on the movement lens unit, the smaller the load in the automatic focus adjustment state, the more the manual operation is performed. The load in the focus adjustment state becomes smaller, and the load is further reduced when the interlocking with the drive device is cut off in the manual focus adjustment state, so that the moving lens unit moves largely even with a small force. Therefore, accurate focus adjustment operation becomes difficult, or
Even after the subject is in focus, it will be inadvertently changed to the non-focus state.

The purpose of this invention is to reduce the operation torque during the automatic focusing operation to reduce the load on the drive device,
An object of the present invention is to provide a lens barrel in which an operation weight can be switched so that a reliable focus adjustment operation can be performed in a manual focus adjustment state, and an operation weight changing mechanism can be achieved with a simple configuration.

[Means for solving problems]

A lens barrel body, a member for slidingly contacting the lens barrel body to move the moving lens unit in the optical axis direction, and a manual lens moving operation for manually moving the member to move the moving lens unit in the optical axis direction. A mechanism, an automatic lens movement operating mechanism that drives the above-mentioned member by the drive device to move the movable lens unit in the optical axis direction, and a driving force is provided between the automatic lens movement operating mechanism and the above-mentioned member. In a lens barrel having a transmission / interruption mechanism for determining whether or not a moving lens unit and an automatic lens movement operation mechanism are in a disconnected state by the transmission / interruption mechanism, the operating weight of the manual lens movement operation mechanism is in a connected state. And an operating weight changing mechanism for making the operating weight larger than the operating weight when the operating weight is Respectively have a groove formed to correspond to each other in, characterized by being configured to be able to change the sliding contact area.

[Action]

In the automatic focus adjustment state, the sliding contact area between the lens barrel body and the member that slides on the lens barrel body and moves the moving lens unit in the optical axis direction is small, and the load on the automatic lens moving operation mechanism is small. In the manual focus adjustment state, the interlock between the driving device and the above-mentioned member is cut off. Then, the sliding contact area between the lens barrel body and the member becomes large, and the operation resistance at the time of operating the movable lens unit becomes large.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are sectional views of a lens barrel (LE) according to the present invention.

(T) is a lens barrel body, which comprises a front lens barrel body (1), a rear lens barrel body (2), etc., both of which are fixed by screwing. The front lens barrel body (1) has four lenses (3a)
The front lens group (3) composed of (3d) is held in a fixed position. And, in the rear part of the rear lens barrel body (2),
The rear lens group (4) consisting of one lens (4a) is held in a fixed position. Further, the rear lens barrel body (2) holds a movable lens unit (L) located between the front lens group (3) and the rear lens group (4) and movable in the optical axis (X) direction. Has been done.

The moving lens unit (L) consists of two lenses (5a),
(5b), and a lens holder (6) for holding both the lenses (5a) and (5b). Three guide pins (6a) are screwed and fixed to the outer peripheral edge of the lens holder (6). The guide pin (6a) is inserted through the three cam grooves (2a) each having a lead formed on the peripheral surface of the rear lens barrel body (2), and is fitted onto the rear lens barrel body (2). It engages with three straight-moving grooves (8a) formed on the peripheral surface of the straight-moving groove ring (8) in the optical axis (X) direction.

An operation ring (9) fitted with a rubber ring (9a) having irregularities on its outer periphery is screwed to the outside of the straight groove groove (8) so as to move integrally with the straight groove ring (8). . The guide pin (6a) whose relative movement in the circumferential direction with the rectilinear groove (8) is restricted by the rectilinear groove (8a) by holding and rotating the operating ring (9) by hand, It is guided to the cam groove (2a) of the rear lens barrel body (2). Along with this, the movable lens unit (L) moves in the optical axis (X) direction while rotating around the optical axis (X), and focusing is performed.

That is, the linearly moving groove ring (8) and the operation ring (9) which are integrally operated constitute a manual lens movement operation mechanism (MM) for the movement lens unit (L).

Further, on the outer peripheral surface of the rear end of the straight groove ring (8), there is formed a gear portion (8e) capable of engaging with a coupler gear (10a) continuously provided to the AF coupler (10). And straight groove ring (8)
Is configured to be slidable in the optical axis (X) direction. That is, as shown in FIG. 2, the gear portion (8e) meshes with the coupler gear (10a) in a state of being located on the rear end side in the optical axis (X) direction, and as shown in FIG. The gear (8e) and the coupler gear (10) are located at the front end side in the axis (X) direction.
It is configured to be disengaged from a).

The AF coupler (10) is rotatably held by the rear lens barrel body (2) and has an engagement portion (10b) formed at the rear end thereof.
However, it is exposed to the outside at the rear edge of the rear lens barrel body (2). At the rear end of the rear lens barrel body (2), the camera body (C
The claw portion (2b) that engages with the lens mount (11) of (A) is continuously provided, and this claw portion (2b) is provided in the lens mount (11).
When the lens that is engaged with the lens is attached, the engaging portion (10b) of the AF coupler (10) causes the lens drive motor (1) of the camera body (CA) to
It is configured to be interlocked with the lens drive shaft (12a) that interlocks with 2).

That is, in the state shown in FIG. 2 in which the operation ring (9) is located on the rear end side in the optical axis (X) direction, the gear portion (8e) of the straight groove groove (8) is the coupler gear (8e) of the AF coupler (10). 10a) is engaged and the movement of the moving lens unit (L) in the optical axis (X) direction is automatically performed by driving the lens driving motor (12), which is an example of a driving device, inside the camera body (CA). It is supposed to be done. On the other hand, in the state shown in FIG. 1 in which the operation ring (9) is located on the front end side in the optical axis (X) direction, the movement of the movable lens unit (L) in the optical axis (X) direction is
The operation ring (9) is manually operated.

That is, the rectilinear groove ring (8) and the AF coupler (10) constitute an automatic lens moving operation mechanism (AM) for the moving lens unit (L). Then, the transmission interrupting mechanism (IT) is configured to move the rectilinear groove ring (8) in the direction of the optical axis (X) to connect and disconnect the linked state with the AF coupler (10).

Further, in a state where the operation ring (9) is located at the front end or the rear end in the optical axis (X) direction, the operation ring (9) is urged outward by the spring (13) and held by the outer peripheral surface of the rear lens barrel body (2). The click ball (14) engages with any one of a pair of engagement grooves (8b) formed on the inner peripheral surface of the straight groove ring (8), so that the optical axis (X) of the operation ring (9). The position is maintained in the directional direction.

In the figure, (15) is a diaphragm, which is held in a fixed position on the rear lens barrel body (2). Further, (7) in the figure is an interlocking operation member for the diaphragm (15).

Further, by switching the operating ring (9) back and forth in the optical axis (X) direction, the driving state of the moving lens unit (L) is switched, that is, the moving lens unit (L) and the lens drive by the transmission / interruption mechanism (IT). The operation weight at the time of rotation of the rectilinear groove ring (8) for directly moving the moving lens unit (L) can be changed in accordance with the intermittent transmission operation with the use motor (12).

That is, the lens drive motor (12) for the camera body (CA)
When the moving lens unit (L) is automatically moved by the driving of (1), it is desirable that the rectilinear groove ring (8) is lightly rotated in order to reduce the load on the motor (12). On the other hand, when the movable lens unit (L) is moved by a manual operation with respect to the operating ring (9), the operating ring (9) moves too lightly in such a state, and reliable focusing is difficult. This is because it is desirable that 8) be rotated relatively heavy.

Therefore, an operation weight changing mechanism (HWC) is provided between the rear lens barrel body (2) and the rectilinear groove ring (8). next,
The operation weight changing mechanism (HWC) will be described with reference to FIGS. 1 to 3.

As shown in FIG. 3, a plurality of annular grooves (2c) are formed along the circumferential direction on the outer peripheral surface of the rear lens barrel body (2). On the other hand, a plurality of annular grooves (8c) are also formed on the inner peripheral surface of the straight groove ring (8) along the circumferential direction thereof. Grease (16) is filled between the outer peripheral surface of the rear lens barrel body (2) and the inner peripheral surface of the rectilinear groove ring (8). Then, by moving the operation ring (9) back and forth, the sliding contact area between the outer peripheral surface of the rear lens barrel body (2) and the inner peripheral surface of the rectilinear groove ring (8) is changed to change the operation resistance. It is configured so that it can be done.

When the operation ring (9) is located on the front side in the optical axis (X) direction, as shown in FIGS. 1 and 3, adjacent annular grooves (2c) on the outer peripheral surface of the rear lens barrel body (2) are shown. ) The annular convex portion (2d) formed between the two is extremely close to the annular convex portion (8d) formed between the adjacent annular grooves (8c) on the inner peripheral surface of the straight groove ring (8). It is in sliding contact with a small space. Therefore, in this state, the sliding contact area between the outer peripheral surface of the rear lens barrel body (2) and the inner peripheral surface of the rectilinear groove ring (8) becomes relatively large.

On the other hand, in the state where the operation ring (9) is located on the rear side in the optical axis (X) direction, as shown in FIG. 2, the rear lens barrel body (2) is
The annular groove (2c) and the annular protrusion (2d) on the outer peripheral surface of the
The annular groove (8d) and the annular groove (8d) on the inner circumferential surface of the straight groove ring (8)
It fits into c) with a relatively large gap. Therefore, in this state, there is almost no sliding contact between the outer peripheral surface of the rear lens-barrel body (2) and the inner peripheral surface of the rectilinear groove ring (8), and the sliding contact occurs only at both ends of the rectilinear groove ring (8). The rear lens-barrel body (2) and the rectilinear groove ring (8) are held together by contact.

When two members are in sliding contact with each other through a fluid such as grease (16) which is an example of a fluid lubricant, the force acting between the members in the sliding contact surface direction is the sliding contact area. Proportional to. That is, as shown in FIG. 1 and FIG.
When the sliding contact area between the outer peripheral surface of the rear lens barrel main body (2) and the inner peripheral surface of the rectilinear groove ring (8) is large, the operation resistance of the movable lens unit (L) during operation becomes large. On the other hand, as shown in FIG. 2, when the sliding contact area between the outer peripheral surface of the rear lens barrel body (2) and the inner peripheral surface of the rectilinear groove ring (8) is small, the moving lens unit (L) The operation resistance during the operation is reduced.

Therefore, when the movement of the movable lens unit (L) is performed manually by the operation ring (9), the operation weight is relatively heavy and reliable focusing can be performed. Further, when the moving lens unit (L) is moved automatically by the lens driving motor (12) of the camera body (CA), the operation weight is relatively light and the load on the motor (12) is small. Less.

That is, the annular convex portion (8d) on the inner peripheral surface of the rectilinear groove ring (8), which is an example of the pair of sliding contact portions (S ₁ ) and (S ₂ ), and the annular surface on the outer peripheral surface of the rear lens barrel body (2). The operation weight changing mechanism (HWC) is changed from the change operation tool (CM) which is used by the convex portion (2d) and the rectilinear groove ring (8) for directly operating the moving lens unit (L) and the operation ring (9). ) Is configured. Further, the change operation tool (CM) constitutes an interlocking mechanism.

In the configuration described in the above embodiment, the movable lens unit (L) is rotated in the circumferential direction by the manual operation of the operation ring (9) or the automatic operation by the lens driving motor (12), and the optical axis ( It moved in the X) direction. But,
In such a structure, when the diaphragm (15) is fixed to the lens holder (6) together with the lenses (5a) and (5b), that is, the diaphragm (15) is a moving lens because of the necessity of lens performance and the like. A problem may occur in the case of a structure that moves in the optical axis (X) direction together with the unit (L).

That is, most of the recent diaphragms are automatic diaphragms, which are operated by the camera body (CA) and are narrowed down to a predetermined diaphragm value during a shooting operation. Therefore, as shown in the previous embodiment, the interlocking operation member (7) is required between the diaphragm (15) and the camera body (CA). Further, since the interlocking structure with the interlocking operation member (7) becomes complicated, it is not preferable that the diaphragm (15) moves while rotating in the circumferential direction. Next, an example of a configuration applicable to such a case will be described.

FIG. 4 shows a partial cross section of the lens barrel of this embodiment. The same parts as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted unless particularly necessary.

In this embodiment, the operating ring (9) is fitted onto the rear lens barrel body (2), which corresponds to the straight groove ring (8) in the previous embodiment.
The tubular member (18) which rotates integrally with the above is not formed with a rectilinear groove in which the guide pin (6a) of the moving lens unit (L) is engaged. Then, on the rear lens barrel body (2), the optical axis (X)
Three straight grooves (2e) are formed along the direction. Further, in the state of being fitted in the rear lens barrel body (2), three cam grooves (17a) having leads are formed on the peripheral surface of the cam ring (1
7) is provided.

The three guide pins (6a) fixed to the lens holder (6) of the moving lens unit (L) have their respective cam grooves (17).
It is inserted through a) and is engaged with the rectilinear groove (2e) of the rear lens barrel body (2). Further, the interlocking pin (19) fixed to the outer circumference of the cam ring (17) is inserted through the annular groove (2f) formed in the peripheral surface of the rear lens barrel body (2), and the peripheral surface of the tubular member (18). It engages with the operation weight switching guide groove (18e) formed in the optical axis (X) direction.

The movable lens unit (L) moves in the direction of the optical axis (X) as in the previous embodiment, whereby focusing is performed. Similarly to the previous embodiment, the moving lens unit (L) is also moved manually with respect to the operation ring (9) or the lens driving motor (12) of the camera body (CA) via the AF coupler (10). It is supposed to be performed by automatic operation.

When the tubular member (18) is rotated by any of the above operations, the cam ring (17) is integrally rotated. Since the rotation of the moving lens unit (L) around the optical axis (X) is restricted by the rectilinear groove (2e) of the rear lens barrel body (2), the guide pin (6a) of the moving lens unit (L). ) Is guided by the cam groove (17a) of the cam ring (17) and advances along the straight groove (2e). Thereby, the movable lens unit (L) is moved back and forth in the optical axis (X) direction to perform focusing.

In this embodiment as well, the operation weight when moving the movable lens unit (L) can be changed by the same configuration as the previous embodiment. That is, the annular convex portion (2d) formed between the circumferential annular grooves (2c) formed on the outer peripheral surface of the rear lens barrel body (2), and the inner peripheral surface of the tubular member (18). The annular convex portion (18d) formed between the circumferential annular grooves (18c) formed in the pair is a pair of sliding contact portions (S ₁ ) and (S ₂ ). The operation weight can be changed by changing the sliding contact area between the two sliding contact portions (S ₁ ) and (S ₂ ) that are in sliding contact with each other via the grease (16).

The sliding contact area can be changed in the same manner as in the previous embodiment by changing the tubular member (1
This is performed by moving the operation ring (9) that moves integrally with 8) in the optical axis (X) direction. At this time, the tubular member (18)
Moves along the operation weight switching guide groove (18e), the interlocking pin (19) fixed to the cam ring (17) does not move. The operation weight is heavy when the operation ring (9) is located on the front side in the optical axis (X) direction, and is large when the operation ring (9) is located on the rear side in the optical axis (X) direction. Is lighter.

That is, the sliding operation parts (S ₁ ) and (S ₂ ) described above, and the moving operation member (HM) including the operation ring (9) and the tubular member (18).
The operation weight change mechanism (HWC) is configured by the change operation tool (CM) that is also used by. Further, the change operation tool (CM) constitutes an interlocking mechanism.

Further, the gear portion (18a) formed on the outer peripheral surface on the rear end side of the tubular member (18) has an AF coupler (18a) only when the operation ring (9) is located rearward in the optical axis (X) direction. It is adapted to occlude the coupler gear (10a) of 10). Note that FIG. 4 shows a state in which the operation ring (9) is located on the rear side in the optical axis (X) direction and the operation weight is light. In the figure, (18f) is an engaging groove for the click ball (14) held by the rear lens barrel body (2).

In both of the above-mentioned two embodiments, even when the moving lens unit (L) is moved in the optical axis (X) direction by the automatic operation by the lens driving motor (12), the operating ring (9) and the straight line are moved. The groove ring (8) or the tubular member (18) was configured to always rotate integrally. Alternatively, in the automatic focus adjustment state, the operation ring (9) and the rectilinear groove ring (8) may be separated from each other so as to reduce the load on the lens drive motor (12). Next, an embodiment having such a configuration will be described.

FIG. 5 and FIG. 6 show a partial cross section of the lens barrel of this embodiment. The same parts as those in the embodiment shown in FIGS. 1 and 2 are given the same reference numerals, and the description thereof will be omitted unless particularly necessary.

In this embodiment, the rectilinear groove ring (8) does not move in the direction of the optical axis (X) but is rotatable only. On the other hand, the operation ring (9) is configured to be movable in the optical axis (X) direction. The operation ring (9) and the rectilinear groove ring (8) are not screwed, but instead, the tongue piece (9b) is fixed to the operation ring (9) and the rectilinear groove ring (8) is fixed. Is the operating ring (9)
An engaging projection (8f) is provided that engages and disengages with the tongue (9b) as the optical axis (X) moves.

The AF coupler (10) is urged to the left in the figure by a spring (20) and attached to a fixed ring (21) fixed to the rear lens barrel body (2). And the fixed ring (2
A fork ring (31) having an elongated hole (31a) that engages with an engaging portion (10c) of an AF coupler (10) is attached to 1) so as to be movable only in the optical axis (X) direction. There is. Further, the engagement portion (10c) of the AF coupler (10) having a small diameter is rotatably fitted into the elongated hole (31a).

The fork ring (31) has a circumferential groove (31b) with a key plate (3
2) is loosely fitted. Then, with the movement of the operation ring (9) to the right in the figure, the key plate (32) also moves integrally, whereby the fork ring (31) is pulled to the right in the figure and the AF The coupler (10) is configured to forcibly move to the right in the figure against the urging force of the spring (20) to release the interlocking with the lens drive shaft (12a).

A pair of engagement grooves (9d) are formed in the operation ring (9), and the operation ring (9) is selectively engaged with the engagement groove (9d).
Click ball (1) for positioning in the optical axis (X) direction of
4) is provided on the peripheral surface of the front lens barrel body (1).

Further, in this embodiment, the operation weight changing mechanism (HWC)
Are provided between the operating ring (9) and the fixed ring (21). That is, the circumferential annular convex portion (9e) formed on the outer peripheral surface of the operation ring (9) and the circumferential annular convex portion (21a) formed on the inner peripheral surface of the fixed ring (21) are A pair of sliding contact parts (S ₁ ) and (S ₂ ). The change operation tool (CM) for changing the slide contact area between the two slide contact portions (S ₁ ) and (S) is the operation ring (9).

The state shown in FIG. 5 shows a state in which the operating ring (9) is located on the rear side in the optical axis (X) direction. At this time, the AF coupler (10) is on the left side in the figure due to the urging force of the spring (20), and its engaging portion (10b) engages with the lens drive shaft (12a), and the lens drive motor (12). The automatic focus adjustment by is possible. Further, the tongue piece (9b) of the operation ring (9) is not engaged with the engaging projection (8f) of the rectilinear groove ring (8). Furthermore, at this time, the operation weight change mechanism (HWC)
The sliding contact area of the pair of sliding contact portions (S ₁ ) and (S ₂ ) constituting the above is small, and the operation weight is light.

From this state, the operation ring (9) is moved to the right in the figure to operate the AF coupler (10) and the lens drive shaft (12a).
Is disengaged from the tongue (9b) of the operating ring (9).
Engages with the engaging convex portion (8f) of the straight groove ring (8), and the manual focus adjustment by the operation ring (9) becomes possible. At this time, the sliding contact area of the pair of sliding contact portions (S ₁ ) and (S ₂ ) is large, and the operation weight is heavy.

In all of the above-mentioned examples, the operating weight is changed in two steps as the operating weight changing mechanism (HWC), and the click ball (14) and the engaging grooves (8b), (9d), (18f ) Has been described. Instead of this, three or more engaging grooves (8b), (9d), (18f) may be formed to change the operation weight in three or more stages and hold it. In addition, the click ball (14) and the engagement groove (8
b), (9d) and (18f) are engaged, and the operating weight is changed to a configuration in which the engagement grooves (8b), (9d) and (18f) are omitted and the spring (13) is attached. Click ball (14), straight groove ring (8), operation ring (9),
Alternatively, the operating weight may be held only by the frictional force between the tubular member (18) and the operating weight may be continuously changed. Of course, also in the previous several embodiments, the click ball (14) and the engaging grooves (8b), (9d),
The operation weight can be continuously changed and held in a portion other than the portion engaged with (18f).

Further, the number and types of lenses forming the moving lens unit (L) or the structure for moving the moving lens unit (L) can be changed as appropriate. For example, in the case of a configuration for performing automatic focus adjustment, instead of the configuration described in the previous embodiment in which the lens drive motor (12) as a drive device is incorporated in the camera body (CA), the inside of the lens barrel is replaced. A motor may be provided as a driving device for moving the moving lens unit (L).

Further, in the above-mentioned several examples, the operation ring (9) constituting the manual lens movement operation mechanism (MM) for moving the movement lens unit (L) in the optical axis (X) direction, and the change for changing the operation weight Only the configuration that also serves as the operation tool (CM) has been described. Alternatively, although not shown, the operation weight may be changed by a change operation tool (CM) provided separately from the operation ring (9).

[Effect of device]

As described above, the lens barrel according to this invention is
While reducing the load on the drive unit in the automatic focus adjustment state, it is possible to prevent unreasonable force from being applied to the drive unit in the manual focus adjustment state and to give an appropriate operation weight to the manual operation. Since it is possible, accurate and stable manual focus adjustment operation can now be performed.

Moreover, as the structure of the operation weight changing mechanism,
Since the groove is formed in the member for slidingly contacting the lens barrel body to move the moving lens unit in the optical axis direction, and the sliding contact area is changed, the structure is simple and the number of parts can be increased. Absent. Therefore, the operation weight changing mechanism does not become large, and the lens barrel itself does not become large.

[Brief description of drawings]

The drawings show an embodiment of a lens barrel according to the present invention.
1 and 2 are longitudinal sectional views of the lens barrel. FIG. 1 shows a state in which the operating weight is heavy, FIG. 2 shows a state in which the operating weight is light, and FIG. 3 shows the operating weight changing mechanism. Part of an enlarged sectional view, FIG. 4 is a longitudinal sectional view corresponding to FIG. 2 showing a part of a lens barrel of another embodiment, and FIG. 5 is a second embodiment showing yet another embodiment.
FIG. 6 is a longitudinal sectional view corresponding to the drawing, and FIG. 6 is a partially enlarged view of another embodiment shown in FIG. (12) …… Drive device, (X) …… optical axis, (L) …… moving lens unit, (MM) …… manual lens moving operation mechanism,
(AM) …… Automatic lens movement operation mechanism, (IT) …… Transmission intermittent mechanism, (HWC) …… Operation weight change mechanism, (S ₁ ),
(S ₂ ) …… A pair of sliding contact parts, (16) …… Fluid lubricant, (C
M) …… Change operation tool.

Claims (2)

[Scope of utility model registration request] 1. A lens barrel body, a member for slidingly contacting the lens barrel body to move the moving lens unit in the optical axis direction, and driving the member by manual operation to move the moving lens unit in the optical axis direction. Provided between the automatic lens movement operating mechanism and the automatic lens movement operating mechanism, and an automatic lens movement operating mechanism that causes the movement lens unit to move in the optical axis direction by driving the above-mentioned member by a driving device. In a lens barrel having a transmission / intermittent mechanism for determining whether to transmit a driving force, operation of a manual lens movement / operation mechanism when the movable lens unit and the automatic lens movement operation mechanism are in the disconnection state by the transmission / interruption mechanism. An operating weight changing mechanism is provided for making the weight heavier than the operating weight when in the connected state, and the operating weight changing mechanism is provided on the lens barrel body. Has a groove formed to correspond to each other on each of the above members,
A lens barrel characterized by being configured so that the sliding contact area can be changed. 2. An interlocking mechanism for interlocking the operation weight changing mechanism and the transmission / interruption mechanism is provided, and when the transmission / interruption mechanism is in the connected state, the operation weight of the manual lens moving operation mechanism is lightened to be in the disconnected state. The lens barrel according to claim 1, wherein the operating weight is sometimes increased.