JP2001074992A - Lens barrel device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the dimension of the diameter of a frame body rotated inside smaller and to make executable zoom driving. SOLUTION: This device 10 is constituted of a rotary frame 5 at the outer peripheral part of which a gear part 5a is formed and which advances and retreats in an optical axis direction while rotating, a pinion gear (that is, an idle gear 4) moving in the advancing/retreating direction of the frame 5 and always meshed with the gear part 5a, and a pinion driving gear (that is, a long gear 2) always meshed with the pinion gear, arranged outside the outer peripheral part of the frame 5 and driven to be rotated around an axis parallel with the advancing/retreating direction of the frame 5. The lens barrel device is provided with a rotary supporting shaft (long shaft 3) arranged in parallel with the pinion driving gear 2, for example, in order to move the pinion gear 4 in the advancing/retreating direction of the frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel apparatus for driving a zoom.

[0002]

2. Description of the Related Art Among the techniques relating to a lens barrel for performing a zoom drive in recent years, for example, Japanese Patent Application Laid-Open No. 11-72682, which has been proposed as a structure of a conventional zoom lens barrel device, discloses a multi-stage zoom lens barrel. In the structure, it has a fixed frame on the outermost circumference,
A structure in which a frame (for example, a rotating frame such as a moving frame or a cam frame) inside the fixed frame is directly rotated by a plurality of gears having a long tooth width (hereinafter, referred to as long gears) supported by the fixed frame. Is disclosed. In the structure taught in this example, separate long gears are provided for setup and zoom for bringing the lens barrel into a photographable state. A switching mechanism for switching one drive system to each application or a differential mechanism having two differential shafts allows the user to easily switch from a collapsed state to a zoom operation through a predetermined setup operation.

[0003]

However, in the lens barrel disclosed in Japanese Patent Application Laid-Open No. H11-72682, the position of the first or second gear of the frame provided inside the fixed frame is determined. In this case, since the inner frame body is directly rotated by the first or second gear, there is a disadvantage that the diameter of the inner frame body on which the gear teeth are formed becomes large. Further, in order to simplify the switching, the number of components including a plurality of expensive long gears or the like has not been reduced so much as compared with the related art, and the structure still remains complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lens barrel device in which the diameter of a frame rotating inside is smaller than that of a conventional one and can be driven for zooming.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and achieve the object, and the present invention employs the following means. According to the first aspect of the present invention, the outer peripheral portion has the gear portion, and the rotating frame that moves forward and backward and rotates, and the pinion gear that moves in the forward and backward moving direction of the rotating frame and always meshes with the gear portion (that is, the intermediate play) Such as a gear: an idle gear) and a pinion drive gear (i.e., a long gear) which is always in mesh with the pinion gear, is disposed outside the outer peripheral portion of the rotary frame, and drives to rotate around an axis parallel to the advance / retreat direction. A cylinder device is proposed.

In order to move the pinion gear in the forward / backward direction, a lens barrel device having a rotation support shaft arranged in parallel with the pinion drive gear (long gear) is proposed. According to a second aspect of the present invention, there is provided a lens barrel device configured such that the pinion gear (i.e., idle gear) is supported by the moving frame.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention will be described below in detail with reference to a plurality of embodiments. (First Embodiment) FIG. 1 is a cross-sectional view illustrating the configuration of a main part of a lens barrel device 10 according to a first embodiment of the present invention.

The lens barrel device 10 integrally formed as a zoom lens barrel unit includes a fixed frame 1 fixed to an external fixed unit of a camera, a long gear 2 supported inside the fixed frame 1, A long shaft (idle shaft) 3 supported by the frame 1 and having a long shaft length;
An idle gear (intermediate gear) 4 that moves up and down and meshes with the long gear 2, a rotating frame 5 that moves forward and backward in the optical axis direction while rotating with the rotation of the idle gear 4,
A moving frame 6 is provided inside the rotating frame 5 and moves forward and backward in the optical axis direction integrally with the rotating frame 5. The “idle gear” referred to here is an intermediate gear that is interposed between a gear 5a formed on the outer peripheral portion of the rotating frame 5 and the long gear 2 that transmits a driving force from a driving source (not shown). I mean idle gear.

The photographing optical system of the lens barrel device 10 includes at least a first lens group (for example, a first photographing lens 9a) and a second lens arranged to be movable on the same optical axis so as to be capable of zoom driving. Group (for example, the second photographing lens 9)
b), and these first and second lens groups (9
a, 9b) are held independently of each other by a zoom frame 7 driven by zooming and a lens frame 8 driven by extension.

As described above, the first stage which is a front stage of the photographing optical system is described.
A zoom frame 7 holding a first photographic lens 9a as a lens group and a lens frame 8 holding a second photographic lens 9b as a second lens group, which is also a rear stage of the photographic optical system, are mutually moved by a predetermined cam mechanism. Is configured to be able to move forward and backward while changing the distance (details will be described later). With this cam mechanism, the zoom frame 7 and the lens frame 8 are
In a state where the rotation is restricted, advance and retreat driving is performed in which the focal length is changed by moving back and forth along the optical axis without changing the relative distance.

A main element constituting the lens barrel device 10 of the present invention is, for example, a rotating frame 5 having a gear portion 5a formed on an outer peripheral portion of a cylindrical frame body and moving forward and backward in the optical axis direction while rotating.
And an idle gear 4 composed of, for example, a pinion gear, which can also move in a predetermined moving range in the direction in which the rotary frame 5 moves forward and backward, and always meshes with the gear portion 5a and rotates. And a long gear 2 serving as a pinion drive gear that is disposed outside the outer peripheral portion of the frame 5 and that rotates around an axis parallel to the advance / retreat direction.

In this zoom lens barrel driving mechanism, in order to move the idle gear 4 composed of a pinion gear in the above-mentioned reciprocating direction, a long support shaft serving as a rotation support shaft arranged in parallel with the pinion drive gear (ie, the long gear 2). It has a shaft 3. A plurality of cam grooves (5d, 5e) are formed on the inner wall surface of the rotating frame 5 having a cylindrical shape, and cam followers (7a, 8a) projecting from ends of the zoom frame 7 and the lens frame 8, respectively. ) Are slidably fitted (details described later).

When the rotational force from the drive source (not shown) is transmitted to the long gear 2 to the lens barrel device 10 configured as described above, the rotational force of the long gear 2 is first transmitted to the idle gear 4 meshing with the long gear. Then, this idle gear 4
Is transmitted to the rotating frame 5 that meshes with this. Revolving frame 5
Is rotated with respect to the fixed frame 1, the cam follower 5 b of the rotary frame 5 and the cam groove 1 a formed in the inner wall of the fixed frame 1 make the entire rotary frame 5 light with the zoom frame 7 and the lens frame 8. Move back and forth in the axial direction.

The idle gear 4 moves with the forward and backward movements.
The robot moves forward and backward while rotating on the long shaft 3 supported by the fixed frame 1. The long gear 2 is rotated by a driving force of an external drive unit (not shown). The torque of the long gear 2 is transmitted to the gear 5 of the rotating frame 5 via the idle gear 4.
a, and the rotating frame 5 is rotated by this rotating force.
At this time, the idle gear 4 exists between the protrusion 5f formed on the outer peripheral portion of the rotating frame 5 and the flange 6d of the moving frame 6, and moves forward and backward in the optical axis direction.

The cam follower 5b of the rotating frame 5 is
The rotary frame 5 advances and retreats with respect to the fixed frame 1 at the same time as the rotation. The rotation of the moving frame 6 is regulated by a not-shown rectilinear groove 6b (see FIG. 2) provided in the fixed frame 1.

Further, since the connecting groove 5c cut in the circumferential direction of the rotary frame 5 and the rib 6a protruding from the movable frame 6 are fitted together, the movable frame 6 is It moves forward and backward integrally in the axial direction. The zoom frame 7 is linearly guided (guided) by a rectilinear groove 6 b provided in the moving frame 6, and moves forward and backward by a cam 5 d provided on the inner periphery of the rotating frame 5. Also,
Similarly, the lens frame 8 is guided linearly by a rectilinear groove 6b provided on the moving frame 6, and moves forward and backward by a cam groove 5e provided on the inner periphery of the rotary frame 5. By the above movement, the total length of these frames and the distance between the first lens group 9a and the second lens group 9b change, and the zoom operation can be performed.

During this zoom operation, the idle gear 4 moves integrally with the moving frame 6 in the optical axis direction,
On and off. Further, the long shaft 3 can be guided in a predetermined direction as a linear guide by fitting into the fitting hole 6e of the moving frame 6.

Here, the operation of the cam mechanism will be described in detail. The cam mechanism used in the lens barrel device 10 of the first embodiment performs operations as shown in plan development views in FIGS. That is, in the cam mechanism shown in FIG. 2, two rows of cam grooves 5d and 5e that are not parallel to the rotary frame 5 are formed across the optical axis direction, and these cam grooves 5d and 5e are formed.
The zoom frame 7 as the first lens barrel is slidable along 5e.
Further, two cam followers 7a and 8a protruding in a cylindrical shape from the end of the lens frame 8 as the second lens barrel are fitted respectively.

A straight groove 6b as shown by a broken line is formed in the direction of the optical axis below the inside of the rotary frame 5, and the two cam followers 7a and 8a are fitted therein.
When the rotating frame 5 rotates, the cam followers 7a and 8a are moved in different directions by the optical axis. That is, the cam follower 7 of the zoom frame 7 provided at the previous stage as the first lens barrel
a reaches the other end (that is, the tele end) and is set to a high-magnification zoom position. At this time, the lens frame 8 provided at the subsequent stage as the second lens barrel is set at a position separated by a predetermined distance, and the high-magnification zoom drive ends.

In the cam mechanism shown in FIG. 3, a row of cam grooves 1a are formed in the fixed frame 1 so as to cross the optical axis direction as shown in the figure, and the cam grooves 1a are slidably and rotatably rotated. A single cam follower 5b protruding from the end of the frame 5 in a cylindrical shape is fitted. Therefore, as described above, the cam follower 5b of the rotating frame 5 is guided along the cam groove 1a formed obliquely on the stationary frame 1 that does not move. As described above, even if each of the zoom frame 7, the lens frame 8 and the rotary frame 5 advances and retreats in a slight stroke, the synergistic effect of the above-described extension / extension process by zoom drive and the movement thereof also increase.

Next, the configuration and operation of the drive control of the lens barrel device 10 will be described. FIG. 4 (a),
FIG. 2B shows a drive unit and a drive control unit of a camera incorporating the lens barrel device 10. According to the configuration diagram schematically shown in FIG. 4A, this camera has a zoom-up switch 11a and a zoom-down switch 11b that are linked to a seesaw-type zoom button 11 protruding from the upper surface thereof. A main switch 12a linked to the main button 12 as a main power button and a release switch 13a linked to the release button 13 are provided.

Inside the camera, the lens barrel retract switch SW16 is switched when the lens barrel of the camera is completely retracted by the operation of turning off the main button 12, and switched when zoom driving is performed to the telephoto limit. The lens barrel tele end detection SW 17 and the CPU 1 functioning as an overall control means of the camera.
5 is connected. The CPU 15 is controllably connected to a motor driver 18, and is provided with a motor 18a controlled by the motor driver 18 for driving a lens barrel and other movable parts. Further, for example, a photo interrupter (hereinafter abbreviated as PI) unit 19 is provided as a position detecting element for film detection and the like, and this PI unit 19 is configured as follows so that the driving force of the motor 18a can be shared. ing.

As shown in a perspective view in FIG. 4B, the PI unit 19 is rotated by a motor 18a. The rotated light-shielding splash 19b is rotatably fixed to one end of a motor shaft of the motor 18a. As shown in FIG. 4, the light-shielding spring 19b is configured so that the position of the light-shielding spring 19b can be detected by a position detecting element made of PI. The motor 18a is normally driven by control based on a signal from the position detecting element in addition to detecting the state of the film cartridge or the like. A pinion gear 18b is attached to the end of the motor shaft of the motor 18a,
It can also be configured to be a drive source to In the camera of the present invention, the operation of the lens barrel is appropriately controlled in accordance with a programmed camera sequence that is started by turning on / off the main button 12.

The control procedure for the zoom lens barrel of the camera according to the present invention will now be described with reference to the flowchart shown in FIG. First, in step S10, the main SW 12
It is determined whether or not a has been turned on (S10). If it has been turned on, a predetermined setup operation of the camera is performed (S11), and the process proceeds to step S20. On the other hand, if the answer is NO here, it is regarded as an OFF operation, and an operation of retracting the lens barrel is performed (S12).

In step S20, it is determined whether or not the lens barrel is completely retracted based on the switching of the lens barrel retracting completion SW 16 (S20). If the retracting operation has been completed, the processing is terminated as step S60. Move to on the other hand,
The following various operations are monitored in order to shift to a photographable operation. That is, in step S30, the release SW
It is determined whether or not 13a has been turned ON (S30).
If the N operation has been performed, a predetermined exposure operation of the camera is performed (S31). Immediately thereafter, only one frame of the film is wound up (S32), and the process proceeds to step S60.

Subsequently, in step S40, it is determined whether or not the zoom-up switch 11a is turned on (S40). If the zoom-up switch 11a is turned on, a predetermined zoom-up operation is performed and the lens barrel is extended forward (S41). Then, the process proceeds to step S60.

In step S50, it is determined whether or not the zoom-down switch 11b has been turned ON (S5).
0) When the ON operation is performed, a predetermined zoom-down operation is performed and the lens barrel is retracted backward (S51).

In step S60, it is determined whether or not the camera has been operated by the user for a predetermined time or longer (S60). If the camera has not been operated, step S70 is performed.
In order to put the CPU 15 into the sleep state, HALT
A state (ie, a standby state) is set (S70). However, the HALT state is programmed so that the main switch 12a can be returned to the normal state (restart) by the ON operation of the main SW 12a.

Although not described in detail here, the focus adjustment of the lens barrel device 10 can be appropriately controlled by a known automatic focusing mechanism as in the prior art. A known conventional technique is also applied to automatic exposure control and the like.

(Operation and Effect 1) FIGS. 6 and 7 show a state in which the above-described lens barrel device 10 is incorporated into a camera housing as one unit to explain the operation and the effect according to the first embodiment. And the completed camera body 40
The appearance of is shown. The camera exemplified here is a simple camera capable of performing zoom photographing, and the lens barrel device 10 of the present invention is one unit configured as a zoom lens barrel unit in this camera. In the center of the front surface of the camera body, a first photographing lens 9a, which is a front stage of the above-described lens barrel device 10, is exposed, and the entire lens barrel is stored in a collapsed state.

Directly above the first photographing lens 9a, a finder unit 20 having an AF projection window 21, an AF light receiving window 22, and a finder window 23 for distance measurement and having a distance measurement function of, for example, a phase difference method is provided. Is attached. In addition, a cartridge chamber 41 for storing a film cartridge and a spool chamber 4 for winding a film are provided on the left and right sides of the lens barrel device 10.
2 are arranged. A flash unit 30 having a flash tube 32 inside a flash window 31 is mounted on the upper surface of the spool chamber 42. In the lens barrel device 10, the drive system is disposed obliquely upward as shown in FIG.

According to the first embodiment, there is provided a rotation support shaft (long shaft 3) arranged in parallel with the pinion drive gear (long gear 2) to move the pinion gear (idle gear 4) in the forward and backward directions. By configuring the lens barrel device 10 as described above, the number of constituent members is reduced and the outer diameter of the lens barrel can be relatively reduced as compared with a conventional zoom lens barrel.

That is, the dimensional effect of such a configuration of the camera body 40 is that even if there is a driving source such as a motor provided adjacent to the lens barrel, the outer diameter of the lens barrel device 10 of the present invention can be reduced. φD becomes smaller than before, so that the spool chamber 4
The distance to the inner end of the camera 2 can be reduced, and the front cover of the camera can be reduced in size. By thus configuring the zoom lens barrel to have a small outer diameter, it is possible to provide a small barrel apparatus 10 capable of zoom driving as a unit for a small camera.

(Modification 1) The first embodiment described above may be modified as follows. For example, the above-described cam followers 1a, 5d, and 5e relating to the cam mechanism are not limited to the above-described shapes, and may be replaced with helicoids. In addition, the arrangement of the cam grooves may be appropriately modified according to the characteristics of the zoom drive. According to these modified embodiments, the same or higher effects as those of the first embodiment can be expected.

(Second Embodiment) FIG. 8 is a sectional view showing the structure of a lens barrel device 10 according to a second embodiment of the present invention. However, the following description focuses on the features of the first embodiment, focusing on the differences from the first embodiment. The lens barrel device 10 of the second embodiment is different from the first embodiment in that the length of the shaft (that is, the long shaft 3) on which the idle gear 4 is supported is different from the length of the shaft.
There are two features. That is, a short shaft 3 ′ is used as a support shaft for supporting the idle gear 4.

The lens barrel device 10 includes an idle gear (intermediate gear) 4 composed of a pinion gear that meshes with the long gear 2, a rotating frame 5 that advances and retreats in the optical axis direction while rotating with the rotation of the idle gear 4. This is also a lens barrel unit having a moving frame 6 that moves forward and backward in the optical axis direction integrally with the rotating frame 5 inside the rotating frame 5. The pinion gear is an idle gear 4 that rotates while meshing with a gear portion, and is rotatably supported by a moving frame 6 that can move along the long gear 2. Therefore, a flanged shaft (short shaft 3 ′) that supports the idle gear 4 is supported by a short shaft portion 3 a ′ fixed to a hole 6 e ′ provided in, for example, a flange portion 6 d ′ of the moving frame 6. The collar 3b 'is used to prevent the cap from coming off.

As another feature, a key groove 1b is provided on the inner bottom of the fixed frame 1 in the optical axis direction. A linear key 6c protruding from the end of the moving frame 6 along the key groove 1b can be fitted. And straight key 6c
This moving frame 6 has a moving area that can move in the retracting direction.

The operation of the cam mechanism of the lens barrel device 10 according to the second embodiment will be described with reference to FIGS. In the cam mechanism illustrated in FIG. 9 as well, two rows of cam grooves 5d and 5e that are not parallel to the rotary frame 5 are formed in the same manner as in the first embodiment, and two cam followers 7a and 8a are respectively provided with the cam grooves 5d and 5a. It is slidably fitted along 5e.

Further, a rectilinear groove 6b as shown by a broken line is formed below the inside of the rotary frame 5, and the cam followers 7a and 8a are fitted therein. The cam followers 7a and 8a are moved forward and backward at different speeds in the optical axis direction, and the focal length changes.

As shown in an exploded view of the cam mechanism in FIG. 10, a row of cam grooves 1a formed obliquely on the fixed frame 1 are formed across the optical axis direction, and are slidable in the cam grooves 1a. , One cam follower 5 b is fitted from the end of the rotating frame 5. Therefore, the cam follower 5b of the rotating frame 5 is guided along the cam groove 1a formed obliquely on the fixed frame 1 as described above. Further, although not shown, there are three key grooves 1b formed on the inner wall portion of the fixed frame 1, and there are three key grooves 1b guided by three linear keys 6c in the moving frame 6 in the key grooves 1b. The length of the groove 1b can be moved forward and backward. As described above, the movement of the moving frame 6 depends on the keyway 1b.
Is defined by the straight key 6c.

Therefore, similarly to the first embodiment, even if each of the zoom frame 7, the lens frame 8 and the rotary frame 5 advances and retreats by a small stroke, the synergistic effect causes the above-described extension / retraction by the zoom drive. And the movement becomes large.

(Function and Effect 2) As described above, the second aspect of the present invention
In the lens barrel device 10 shown in the embodiment, the pinion gear (that is, the idle gear 4) is configured to be supported by the moving frame 6, and in this case, the rotation support shaft of the pinion gear (idle gear 4). The shaft length does not need to be long as in the first embodiment described above, and it is sufficient if the entire length is slightly longer than the tooth width of the pinion gear. Therefore, cost can be reduced. Further, the key groove 1b formed in the fixed frame 1 defines and guides the linear key 6c of the moving frame 6 in a predetermined direction, so that the moving frame 6 is accurately moved in the optical axis direction over the length of the key groove 1b. You can go straight.

(Modification 2) The tooth width of the long gear 2 in the second embodiment described above may be formed only in the movable area where the idle gear 4 can move, and the entire area supported by the fixed frame 1 at both ends. Instead, a partially formed gear element may be employed, which facilitates the formation of the tooth form. By performing the modification in this manner, the manufacturing cost of the gear element can be reduced, and an effect equal to or greater than that of the above-described embodiment can be expected.

(Other Modifications) In addition, various modifications can be made without departing from the gist of the present invention.

Although the embodiments have been described above, the present invention includes the following inventions. (1) A long gear having an axis parallel to the optical axis and supported by a fixed frame, an axis supported by a fixed frame parallel to the long gear, and an optical axis direction centering on the axis and meshing with the long gear. An idle gear moving forward and backward, a rotating frame rotated by the idle gear,
And a lens barrel characterized by comprising:

(2) The lens barrel is supported by the shaft,
The lens barrel according to (1), further including a moving frame that moves forward and backward integrally with the rotating frame. (3) The lens barrel according to (1), wherein the long gear is driven to rotate by a motor provided outside the fixed frame.

(4) A fixed frame fixed in the camera,
A long gear supported in the fixed frame, a shaft (idle shaft) supported by the fixed frame, an idle gear (intermediate gear) meshing with the long gear, and a light rotating while rotating the idle gear. It is possible to provide a lens barrel device having a rotating frame that moves forward and backward in the axial direction, and a moving frame that moves forward and backward in the optical axis direction integrally with the rotating frame inside the rotating frame. (5) The idle gear is loosely fitted on a long shaft provided along the long spur gear shaped long gear in the moving direction so that the idle gear can advance and retreat on the shaft in a predetermined movement range. The lens barrel device according to (4), which is characterized in that:

(6) In order to transmit the rotational force of the long gear having a long tooth width to the rotating frame, the idle gear is provided as a pinion drive gear comprising a pinion gear, and the idle shaft is provided as a rotation center of the idle gear. The lens barrel device according to (4), wherein the idle gear is configured to move forward and backward on the idle shaft in the optical axis direction. (7) The lens barrel device according to (6), wherein the pinion gear is an idle gear that rotates while meshing with the gear portion, and is fixedly supported by the moving frame so as to be rotatable only. .

[0049]

As described above, according to the present invention, it is possible to provide a lens barrel device in which the outer diameter of the frame rotating inside is small, and zoom driving is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a lens barrel device as a first embodiment of the present invention.

FIG. 2 is a developed plan view showing a cam mechanism of the lens barrel device according to the first embodiment.

FIG. 3 is a developed plan view showing a cam mechanism of the lens barrel device according to the first embodiment.

FIGS. 4A and 4B show a drive control system of the lens barrel device of the present invention, and FIG. 4A is an explanatory diagram showing an electric circuit configuration of the drive control system of the camera; (b) is a perspective view showing a PI which is a part of the drive control system.

FIG. 5 is a flowchart showing a control procedure regarding a lens barrel device of the camera according to the present invention.

FIG. 6 is a perspective view showing the appearance of a camera incorporating the lens barrel device of the present invention.

FIG. 7 is a perspective view showing the appearance of each unit included in the lens barrel device of the present invention.

FIG. 8 is a sectional view showing the structure of a lens barrel device as a second embodiment of the present invention.

FIG. 9 is a developed plan view showing a cam mechanism of the lens barrel device according to the second embodiment.

FIG. 10 is a developed plan view showing a cam mechanism of the lens barrel device according to the second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fixed frame, 1a ... Cam groove of a fixed frame, 1b ... Keyway of a fixed frame, 2 ... Long gear (pinion drive gear), 3 ... Long shaft (Rotary support shaft of the first embodiment), 3 '... Short Shaft (rotation support shaft of the second embodiment), 4 ... idle gear (pinion gear), 5 ... rotation frame, 5a ... gear portion of rotation frame, 5b ... cam follower of rotation frame, 5c ... connection groove (circle) of rotation frame 5d: cam groove of the rotating frame, 5e: cam groove of the rotating frame, 5f: protrusion of the rotating frame, 6: moving frame, 6a: rib of the moving frame, 6b: straight groove of the moving frame, 6c ... 6d: flange portion of the moving frame, 6e: fitting hole of the moving frame, 7: first lens barrel (zoom frame), 7a: cam follower of first lens barrel, 8: second lens barrel ( 8a: cam follower of second lens barrel; 9a: first photographing lens (light) 9b: second photographing lens (later stage of optical lens group), 10: zoom lens barrel unit (barrel device), 11: zoom button, 11a: zoom up SW, 11b: zoom down SW, 12: main button (main power button), 12a: main switch, 13: release button, 13a: release switch, 15: CPU (control means), 16: lens barrel retracting completion switch, 17: lens barrel tele end detection switch, 18: Motor driver (drive source control unit) 18a: Motor (lens barrel drive and other drive source) 18b: Motor pinion gear 19: PI unit (position detection unit) 19a: Photo interrupter (PI) Reference numeral 19b: light-shielding splash (rotating plate), 20: finder unit, 21: AF light-emitting window, 22: AF light-receiving window, 23: finder window, 30: strobe light DOO, 31 ... flash window, 32 ... flash tube, 40 ... camera, 41 ... cartridge chamber, 42 ... spool chamber.

Claims (3)

[Claims] 1. A rotating frame which has a gear portion on its outer peripheral portion and moves forward and backward and rotates, a pinion gear which moves in a direction in which the rotating frame moves forward and backward, and always meshes with the gear portion, and constantly meshes with the pinion gear. And a pinion drive gear disposed outside the outer peripheral portion of the rotating frame and driven to rotate around an axis parallel to the direction in which the lens moves forward and backward. 2. The lens barrel according to claim 1, wherein the pinion gear is an idle gear that rotates while meshing with the gear portion, and is supported by a movable frame that is movable in the reciprocating direction. apparatus. 3. The lens barrel device according to claim 1, further comprising a rotation support shaft arranged in parallel with said pinion drive gear for moving said pinion gear in said forward / backward direction.