JPS58174914A - Lens barrel capable of focusing automatically and manually - Google Patents

Abstract

PURPOSE:To make an operation simple and quick by connecting an operation ring provided on a stationary barrel and a driven member for automatic focusing for a camera body side respectively transmittably on a turning member which accomplishes focusing by turning around the optical axis. CONSTITUTION:While a driven shaft 15 is in the position where it cannot engage a driving shaft 13, an engaging arm 48b rides on a driven part 46b and engages the same frictionally, when an operating ring 38 is in a manual focusing position. Therefore, a rotating cylinder 30 can be driven only by the power transmitted from the ring 38 by the frictional engagement, and the focusing is operated manually by the ring 38. However, the rotation of a rotary barrel 30, etc. is transmitted up to the sahft 15 but is not transmitted to the shaft 13; therefore, no resistance is generated in operating the ring 38, and the changing over between the automatic focusing state and the manual focusing state is accomplished on the spot simply by moving the ring 38 in the optical axis direction.

Description

[Detailed Description of the Invention] Technical field This invention consists of a driven member that receives driving force from an automatic focusing device of a camera body, and an operation ring that is used for switching between automatic focusing and manual focus and for manual focusing operation. and an optical system moving device that moves the optical system in the optical axis direction by being rotated by the driven member during automatic focusing and by the operating ring during manual focusing, and the operating ring moves the optical system in the optical axis direction. The present invention relates to an automatic manual focus adjustable Kei lens barrel which has two positions, a focus position and a manual focus position, and which allows a manual focus operation to be performed by rotating the manual focus position.

Prior Art This oak lens barrel is known, for example, from Japanese Patent Laid-Open No. 151144/1983, which was previously proposed by the applicant of the present application. This discloses a technique that allows the operating ring to be operated by selecting two positions: an automatic focusing position and a manual focusing position. However, from the standpoint of more detailed and specific disclosure, it remains somewhat inadequate.

On the other hand, there is also a device that does not require additional operations using a separate member as described above to switch between automatic focusing and manual focusing.
It is known from the publication No. 05407.

However, in order to switch from the automatic focusing position to the manual focusing position, the operating ring must first be rotated to a predetermined rotational position, which is inconvenient. Although there is only one ring, it requires two types of sweeping, one around the optical axis and one in the direction of the optical axis, which is not easy to operate and takes time. Furthermore, even during manual focusing, the connection between the optical system moving device and the automatic focusing drive means is not disconnected, so unnecessary resistance acts on the manual focusing operation, which is unfavorable in terms of operating feel and operating torque, and produces noise. is also likely to occur.

Moreover, it is not possible to use a speed reduction device with reverse transmission, such as a 7-ohm worm wheel, in the drive force transmission system between the optical system moving device and the automatic focusing drive means, which increases the degree of design freedom. There are restrictions.

Purpose This invention is based on a rotary member that performs focus adjustment by rotating around the optical axis, an operating ring provided on a fixed barrel, and a driven member for automatic focusing on the camera body side. The operation ring is configured to release other unnecessary connections between the automatic focusing position and the manual focusing position set in the optical axis direction, thereby solving the drawbacks of the conventional method. It is an object of the present invention to provide a lens IIN capable of automatic manual focus IIN that can be resolved.

Embodiment To explain the first embodiment shown in FIGS. 1 to 6, FIG. 1 shows a camera body A having an automatic focusing device L, and a lens barrel B that can be automatically and manually adjusted. FIG. 2 is a cross-sectional view of the main parts in a state where it is attached.

Explaining the camera body A side, the removable mount 2 of the camera body A on which the lens barrel B is mounted has a bayonet claw 4 with a bayonet spring 3 disposed on the rear surface. This guarantees no binding. The front cover 5 is integrated with the removable mount 2, and a positioning release member 7 that can protrude near the removable mount 2 on the front surface of the front cover 5 is attached to the front cover 5 and a front abutment 6 located behind it so that it can move forward and backward. It is held loosely.

The positioning release member 7 is secured to the front cover 5 by a spring 8.
An engagement plate 9 that is biased to protrude to the front and that protrudes laterally is fixed to a part of the plate. The overhanging end of the engagement plate 9 is
Outer circumference 7 of mount positioning member 11 provided so as to protrude from mount surface 101C of detachable mount 2 $912
The release member 7 and the positioning member 11 are engaged with each other. The positioning member 11 is formed into a cylindrical shape, and its tip portion is fitted into the through hole of the detachable mount 2, and its rear end portion is fitted to the outer periphery of a bearing 14 for the drive shaft 13 of the automatic focusing device l. This allows it to be moved forward and backward. The bearing 14Fi is fixed to the front base plate 6.

The automatic focusing device 1 transmits a driving force from a driving source (none of which is shown) controlled by a distance measuring device to a driving shaft 13, and the driving shaft 13 is connected to a driven shaft I5 provided in a lens barrel B. The optical system continues to move in the focusing direction until the rangefinder detects the focus state, and the drive source stops as soon as the focus state is reached. The driving force transmitted from the drive source to the drive shaft 13 to stop the optical system at the in-focus position is transmitted to the gear 16 on the front bed plate 6 via a deceleration mechanism, intermediate gear train, etc. (not shown), and further This is done by transmitting the signal from the gear 16 to the gear 17 on the drive shaft 13.

A movable collar 18 is fitted to the drive shaft 13, and this movable collar 1
8 is pressed against the hard guard 20 on the drive shaft 13 by a spring 19 applied between the bearing 14 and moves the drive shaft 13 located inside the cylindrical positioning part 11 to the left in FIG. A movable collar 1 is provided on the inner periphery of the zero positioning member 11 to be biased.
A locking step portion 21 is formed to hold the lens barrel 1.
is removed from the removable mount 2, the drive shaft 13
The engagement end 13a with the driven shaft 15 of the positioning member 11
The engaging end portion 13& is protected from protruding from the tip thereof. Is the positioning member 11 a lens? !
! When the gliIB is properly attached to the removable mount 2, it is engaged with the positioning groove 23 formed in a part of the 7921 surface 22 of the lens barrel B by the force of the spring 8, and the lens barrel B is properly mounted. Lock in the installed position.

When the positioning member 11 engages with the positioning groove 23, the drive shaft 13 is urged by the spring 19 to protrude in a state that follows the engagement movement of the positioning member 11, and the driven shaft 13 protrudes toward the center of the positioner @23. It engages with the shaft 15 and becomes in a state where driving force can be transmitted to the driven shaft 15. 24.
Reference numeral 2B denotes an oscillator and a stator constituting a switch of the drive circuit of the drive source (not shown).The oscillator 24 is linked to the movement of the drive shaft 13, and the lens barrel B is mounted on a removable mount. Only in the state shown in FIG. 1, in which the drive circuit 2 is mounted in the proper position relative to the drive circuit 2, the drive circuit contacts the stator 25 and turns on the drive circuit. On the other hand, when the lens barrel B is removed from the removable mount 2, the positioning member 11 and the drive shaft 13 are maximally protruded from the mount surface lO, and the lens barrel B is removed from the removable mount 2. 2
If the positioning member 11 does not yet face the positioning groove 23 even though both mounting surfaces 10.22 are in pressure contact with each other, the positioning member 11 and drive shaft 13 may be pressed against the mounting surface 22. The mounting surface is moved
By not protruding from the
The oscillator 24 is removed from the stator 25 and the drive circuit is turned off.

Next, the lens barrel 1 is shown in which a front lens group 26 and a rear lens group 27 are held in an inner tube 28, and the focus is adjusted by moving the entire lens group in the optical axis direction. The inner cylinder 28 is held by the fixed cylinder 29 via the rotating cylinder 3'0, and a linear key 31 fixed at the rear end is carved in the inner circumference of the fixed cylinder 29 in the optical axis direction. By engaging in the straight groove 32, it is possible to move only in the optical axis direction. The rotating cylinder 30 includes an inner cylinder 28 and a fixed cylinder 2.
When rotated, the helicoidal engagement 33 and 34 are engaged with both the inner cylinder 28 and the fixed cylinder 29. The rotation n30 itself is moved in the optical axis direction, and the inner cylinder 28 is moved in the optical axis direction by the helicoid engagement 33 between the inner cylinder 28 and the inner cylinder 28. As a result, the inner cylinder 28
The fixed tube 29 has a so-called double helicoid type pointless adjustment structure in which both the helicoid engagement leads 33 and 340 are moved in the direction of the spectral axis. The detachable mount 36 is formed with a bayonet claw 37 that engages with the bayonet claw 4 of the camera body side detachable mount 2.

On the outer periphery of the tip of the fixed barrel 29, there is an operation ring 38 which is used for switching between automatic focus and manual focusing and for manual focusing operation.
is fitted so that it can rotate and move in the optical axis direction.

The operating ring 38 holds a click spring 40, which normally projects slightly inward, in an annular groove 39 carved on the inner periphery of the fitting portion with the fixed cylinder 29. The click spring 40 is selectively elastically engaged with annular locking grooves 41 and 42 formed at two locations on the outer periphery of the fixed barrel 29 in the optical axis direction, so that the operating ring 38 can be moved in the optical axis direction. It can be locked in one of two different positions.

A catch ring 43 is fitted into the inner periphery of the tip of the fixed tube 29, and the fastening ring 44 screwed onto the inner periphery of the fixed tube 29 and the fixed tf
It is fastened between the inner peripheral stepped portion 45 of the IJ29. An intermediate ring 46 for transmitting manual focusing force from the operating ring 38 to the rotary tube 30 is fitted onto the inner periphery of the fastening ring 44, and a snap ring 47 is elastically fitted onto the inner periphery of the front end of the fastening ring 44. and the auxiliary ring 43 so as to be rotatable. The operating ring 38 has an intermediate ring 46 on the inner surface of an inner collar 38a formed at its front end.
A linking member 48 is provided. The linking member 48 is
At several points on the inner periphery of the ring base plate 48a, which is made from the spring material made between the gaps and attached to the inner flange 38 & inner surface with screws 49,
An elastic engagement arm 48b extending rearward is formed by bending (FIG. 6).

The intermediate ring 46 has at its front end a passive sleeve 46 & located inside each engagement arm 481), and the passive sleeve 46 &
On the outer periphery of the tip of 6a, there is an enlarged diameter passive part on which each retaining arm 48'b rides and frictionally engages only when the operating ring 38 is in the forward manual focusing position (Figs. 3 and 4). 46b is formed, and the manual focusing operation force from the operation ring 38 is transmitted by its frictional engagement. The intermediate ring 46 also includes:
The pin 50 installed in one of the rings is engaged with the forward-facing bifurcated passive piece 52& of the passive gear 52 (FIG. 5) attached to the rotary cylinder 30 with a screw 51, so that the working ring 38 The operating force is transmitted to the rotating cylinder 3 degrees. This enables manual focusing operation using the single operation ring 38. The driven shaft 15 is held in the fixed barrel 29 so as to be able to move forward and backward in the optical axis direction, and is linked to the movement of the operation ring 38 in the optical axis direction. be done. The relationship between the driven shaft 15 and the operating ring 38 is such that the fixed cylinder 29 of the operating ring 38
It is formed on the inner surface of the fitting part. The interlocking member 54 made of a metal plate is inserted into the i'lJl' groove 53 so that the arcuate base piece 54a is movable in the circular tS direction with respect to the mound-shaped groove 53, and is fixed to the base piece 54a 1! 1129 is fixed through the optical axis direction slit 55 [the radial two-pronged retaining piece 54b protruding into the inside of 29 is bent to form this engaging piece 54b.
6 in the outer peripheral groove of the driven shaft 15, the automatic focusing position (where the operating ring 38 is on the rear side) is achieved.
The driven shaft 15 is positioned so that the drive shaft 13 can be locked only when the operating ring 38 is in the manual focusing position (Figs. 3 and 4). When the driven shaft 1115 is in the fixed cylinder 29, the driven shaft 1115 is pulled into the fixed cylinder 29 so that the drive shaft 13 cannot engage with the driven shaft 1115.

The rotation of the driven shaft 15 is caused by the first rotation. It is transmitted via the second gears 57 and 58 to the intermediate shaft 59 held in the fixed @ 29 and by the auxiliary ring 43, and is further transmitted from the third gear 60 via the passive gear 52 (see FIG. 5) to the rotating cylinder. 30, so that a focusing operation can be performed using the automatic undoing device.

The intermediate ring 46 further includes a rearwardly projecting bottle, as shown in FIGS. 2 and 4, which are partially enlarged cross-sectional views taken at slightly different positions from FIGS. 1 and 3. 6] is implanted, and this bottle 61 is engaged with a focusing operation range regulating stopper 62 formed in a nine-shaped notch shape by cutting out a certain angle range on the inner circumference of the auxiliary ring 43, and the operation ring 38 is The range in which the intermediate ring 46 can be rotated is restricted, and the inner cylinder 28
To prevent the optical system held in the camera from being operated outside the range from the closest photographing position to the infinite photographing position.

As described above, when the operation ring 38 is in the automatic focusing position shown in FIG. 1-fi and FIG.
While the frictional engagement between the operating ring 38 and the intermediate ring 46 is released, the driven shaft 15 is moved to the engagement position with the drive shaft 13. Therefore, the rotating barrel 30 can be driven only by the transmission from the driven shaft 13 that is connected to the driving shaft 13, and the automatic focusing device 1 can perform an automatic focusing operation. However, the rotation of the intermediate ring 46 and the like due to the automatic focusing operation is not transmitted to the operation ring 38. After automatic focusing, if the operating ring 3B is switched to the manual focusing position, the rotary barrel 30 is separated from the drive side, so that the same state as a focus lock is obtained.

When the operating ring 38 is in the manual focusing position shown in FIGS. 3 and 4, the driven shaft 15 is in a position where it cannot engage with the drive shaft 13, but the engaging arm 48b rides on the driven part 46b, causing friction. Therefore, the rotary cylinder 30 engages with the operating ring 38
It appears that it can be driven only by power transmission through the frictional engagement from the lens 30, and that manual focusing operation is performed using the operating ring 38.

However, rotations such as rotation @30 due to manual focusing operation are transmitted to the driven shaft 15, but are not transmitted to the drive shaft 13 because the driven shaft 15 and the drive shaft 13 are not engaged. Therefore, when operating the operating ring 38, there is no operational resistance that causes the drive source side to follow, and there is no noise generation due to the drive source side following and no power generation action of the motor occurs. 0 drive shaft 13 that can adopt an irreversible transmission speed reducer such as a worm and worm wheel in the transmission system.
Since the driven shaft 15 is not in the engaged position, the driven shaft 15
Because it moves to the left more than in the case of Figures 1 and 2 where it engages with
Due to the leftward movement, the rocker 24 comes off the stator 25,
The drive circuit of the drive source can be turned off.

To switch between the automatic focusing state shown in FIGS. 1 and 2 and the manual focusing state shown in FIGS. 3 and 4, the click spring 40 engages the operating ring 38 with the lock 1II 41 or 42. This is done by moving the light in the direction of the optical axis.

Moreover, no matter which rotational position of the operating ring 38 the movement is made, the automatic focusing state is instantly switched to the manual focusing state or vice versa.

In the case of manual focusing operation, there are times when it is desired to know the photographing distance using a photographing distance scale.In such a case, for example, a distance scale 63 is provided on the outer periphery of the operation ring 38, and a gage 64 is placed on the outer periphery of the fixed barrel 29. (FIGS. 1 and 3), the focus is adjusted using the operation ring 38 until the intermediate ring 46 is regulated by the stopper 62 to the closest photography state or to the infinite photography state, and then the adjustment is made. Turn the operating ring 38 until the distance scale 63 that matches the shooting condition on the side matches the gauge 64.
If the rotation is further rotated, the frictional engagement between the engaging arm 48b and the passive portion 46b causes slippage as described above, and the operating ring 38 is rotated independently to correspond to the focus adjustment operating position of the optical system. The scale 63 and the image point 6
4 allows you to read the actual in-focus shooting distance. Since the reference point 64 is exposed only when the operating ring 38 is in the manual focus position, it also serves as a manual focus position mark. An annular elastic body 71 having a large coefficient of friction, such as rubber, is wrapped around the outer circumference of the passive part 46m), and the operating ring 38 is switched from the automatic focusing position shown in Fig. 7 to the manual focusing position shown in Fig. 8. When the engagement arm 48b rides on the elastic body 71, the engagement arm 4
8b and the elastic body 71, the operation ring 3
8 to the intermediate ring 46.

In the third embodiment shown in FIGS. 9 to 11, an annular linking member 81 having a cross-sectional shape is attached to the inner flange 38 & inner surface of the operating ring 38 with screws 82, and the intermediate ring passive sleeve 46 & Engagement sleeve 81 extending outward
An annular groove 81b is formed on the inner periphery of the tip i part of a, and an annular elastic body 83 having a large friction coefficient such as rubber is formed in this annular groove 81'b.
When the operating ring 38 is switched from the automatic focusing position shown in FIG. 9 to the manual focusing position shown in FIG. , the rotational force from the operating ring 38 is transmitted to the intermediate ring 46. At the automatic focusing position, the elastic body 83 does not contact the passive sleeve 46a. The elastic body 83 is a tube with a spring 84 inserted into its core and bent into a partially open annular shape as shown in FIG.
lb, and the compression force of the spring 84 strengthens the frictional engagement between the passive g 46b and the elastic body 83. However, in order to prevent the elastic body 83 from slipping within the groove 111b, consideration must be given to the fitting state so that a larger frictional engagement force is exerted between the elastic body 83 and the groove 81b than against the passive part 46b, or the open end is placed in the groove. It is even better if it is prevented from rotating by, for example, being locked to a part of 81b.

In the fourth embodiment shown in FIGS. 12 and 13, the groove 81b in the third embodiment is replaced with a solid elastic body 91 made of a high friction coefficient elastic material or a tube as shown in FIG. The shaped elastic body 92 or partially different diameter elastic bodies 93 having large diameter portions 93 & formed at equal intervals is fitted, and the operating ring 38 moves from the automatic focusing position shown in FIG. 12 to the manual focusing position shown in FIG. 13. When it is switched to the focus position, the fitted elastic body 91 etc. rides on the 1 passive part 46b, and the 5
It is pressed between the bottom surface of the 1slb and the outer circumferential surface of the passive part 46b, and a strong frictional engagement is obtained due to a high friction coefficient and a clamping force.

In the fifth embodiment shown in FIG. 15, the outer periphery of the passive part 46b in the first embodiment is provided with numerous lines in the optical axis direction to strengthen the frictional engagement with the retaining arm 48b. There is. Similar lines may be made on the surface of the engagement arm 48b that is pressed against the passive portion 46b.

In the sixth embodiment shown in FIGS. 16 to 19, a large number of engagement grooves 101 in the optical axis direction, in which the tips of the engagement arms 48b engage, are arranged in the circumferential direction on the outer periphery of the passive part 46b. When the operating ring 38 is switched from the automatic focusing position shown in FIG. 16 to the manual focusing position, the engaging arm 48b is not yet engaged with the engaging groove 101 as shown in FIG. In this case, when rotating the operation ring 38 for manual focusing operation,
At the beginning of the slight rotation, the engaging arm 48b faces one of the engaging grooves 101 and fits therein as shown in FIG. 18, and thereafter the rotation of the operating ring 38 can be reliably transmitted to the intermediate ring 46.

The maximum idling angle of the operation ring 38 in the groove where the engagement 11148b fits into the engagement groove 101 can be adjusted by the number of them. For example, there are 7 engaging arms 48111 and 1 engaging arm.
If 01 is 32, the maximum idling angle is approximately 3° 1
3'. Note that for each engagement 54101, a plurality of engagements 111I+! 48b can also be fitted at the same time. The more engagement arms 48b that fit together at the same time, the more easily the rotation of the operating ring 38 can be transmitted to the intermediate ring 46, but the number of engagement arms 48b that fit together at the same time can be reduced to one. The seventh embodiment shown in FIG. 23 has a triangular engagement unevenness 111 in which a V-shaped groove in the optical axis direction is continuously provided in the circumferential direction on the outer periphery of the passive part 46'b.
is formed, and the locking unevenness 1 is formed at the tip of the locking arm 481).
11 is formed with a V-shaped engagement surface 112 that fits into the engagement surface 112. As a result, when the operating ring 38 is switched from the automatic focusing state shown in FIG. 20 to the manual focusing state, the engaging arm 48
The V-shaped engagement surface 112 of b has the engagement unevenness 1 as shown in FIG.
The probability of facing the peaks of 11 is extremely small, and even if there is such a situation, the V-shaped engagement surface 112 will meet the engagement unevenness 111 almost immediately after the operation ring 38 starts to be rotated. 11
1 and transmits the rotation of the operating ring 38 to the intermediate ring 7 ring 46. Therefore, idling of the first operation ring 38 hardly occurs, and the operation efficiency is high. In addition, the rotational force is transmitted from the operation ring 38 to the intermediate ring 46 through the engagement between the V-shaped engagement surface 112 and the engagement unevenness 11'l. This is achieved more reliably by frictional engagement than by frictional engagement.

If the operation ring 38 is to be rotated excessively beyond the proper focus adjustment range, the V-shaped engagement surface 112 will try to climb over the engagement unevenness 11'l, causing the operation ring 3
Because it provides relatively strong click resistance for 80 rotation operations,
It is also preferable as a warning means against excessive operation.

The eighth embodiment shown in FIG. 24 has rectangular engagement unevenness 1 in contrast to the chevron-shaped engagement unevenness 111 in the seventh embodiment.
13, and the operation is almost the same as in the seventh embodiment.

In the ninth embodiment shown in FIGS. 25 and 26, the intermediate ring in each of the embodiments described above is omitted, and a passive sleeve 52b extending forward is provided on the passive gear 52 of the rotary cylinder 30. An enlarged diameter passive portion 52c is formed on the outer periphery of the tip to frictionally engage with the engagement arm 48b, and rotation is transmitted from the operation ring 38 to the passive gear 52 through the frictional engagement. This is the same as the first embodiment.

The focusing operation range regulating stopper 62 is formed on the inner periphery of the front surface of the auxiliary ring 43 and is engaged with a pin 121 implanted on the outer periphery of the passive sleeve 52b, thereby limiting the rotation range of the passive gear 52. It is intended to be regulated.
FIG. 25 shows an automatic focusing state, and FIG. 26 shows a manual focusing state.

The linkage structure for transmitting rotation from the operation ring 38 to the passive part 520 can be replaced with that of each of the second to eighth embodiments.

In the above embodiment, a double helicoid type focus adjustment system in which all groups MB are brought out is shown, but other types may be used, and the automatic focus position and manual focus position of the sweeping ring 38 may The rotating tube 30 and camera body A are linked to the switching of
The connection and disconnection with the side power source can be made between the drive shaft 13 and the driven shaft 15, for example, between the first gear 57 and the second gear 58, or between the third gear 60 and the passive gear 52. , also the second
This can be done by interlocking one of the appropriate transmission locations, such as between the gear 58 or the third gear 60 and the intermediate shaft 59, with switching of the operating ring 38.

27 and 28 show a structure that connects and disconnects the transmission part between the camera-side drive source and the rotating barrel 30 in conjunction with the switching operation of the operating ring 38 between the automatic focusing position and the manual focusing position. Although not provided, automatic manual focusing using another transmission type eliminates the passive gear integrated in the rotating barrel 30 and transmits rotation to the intermediate ring 46 from both the operating ring 38 and the driven shaft 15. An example of adjustment is shown.

The intermediate ring 46 is fitted into the inner periphery of the fixed cylinder 29, and includes a retaining ring 131 screwed onto the inner periphery of the fixed cylinder 29 from the front.
and a stepped portion 132 on the inner periphery of the fixed cylinder 29, and is held without wobbling so as to be able to rotate independently. intermediate ring 46
An intermediate shaft 59 which is transmitted from the driven shaft 15 is disposed on the inner periphery of the rear end.
A passive internal gear 133 that meshes with the upper third gear 60 is formed, a portion of the intermediate ring 46 that protrudes forward from the fixed cylinder 29 is a passive sleeve 134, and an enlarged diameter passive portion 134a is formed on the outer periphery of the base side. has been done.

The operating ring 38 is connected to the outer periphery of the fixed cylinder 29 and the sleeve 13 that protrudes forward beyond the intermediate ring 46 of the rotating cylinder 30.
5, a dustproof cloth 136 is interposed therebetween with almost no contact therebetween. A linking flange 137 is formed at the center of the inner periphery to frictionally engage the passive part 134a and transmit rotation from the operating ring 38 to the intermediate ring 46. Modulus annular elastic body 13
9 is activated by switching the operating ring 38 from the automatic focusing position shown in the 27th figure to the manual focusing position shown in the 28th figure.
It rides on i134m and frictionally engages with it, thereby transmitting the rotation of the operating ring 38 to the intermediate ring 46.

Transmission of rotation from the intermediate ring 46 to the rotary tube 30 is achieved by engagement of a pin 141 implanted on the outer periphery of the rotary tube 30 with a sling 140 in the optical axis direction of the intermediate ring 46 .

A locking collar 143 is formed on the outer periphery of the distal end of the fixed cylinder 29, and the locking collar 143 engages in a groove 142 formed inwardly in the operating ring 38.
The switching range of the operating ring 38 between the automatic focusing position and the manual focusing position is regulated.

An operating ring 38 is located at the rear of the locking part 143 of the fixed cylinder 29.
When the lens is switched to the automatic focusing position shown in FIG. 27, an enlarged diameter portion 146 is formed on which the high friction coefficient annular elastic body 145 held in the groove 144 on the inner periphery of the operating ring 38 rides.
An annular groove 147 is formed on the outer periphery of the enlarged diameter portion 146, with which the elastic body 145 riding on the elastic body 145 is elastically engaged.

This stabilizes the operating ring 38 at the autofocus position.

The inner cylinder 28 has a straight guide threshold 1 carved on its inner circumference.
48, a straight key 149 fixed on the inner periphery of the fixed cylinder 29
By being engaged, it is possible to move only in the optical axis direction. A hood 150 is attached to the outer periphery of the portion of the cylinder 28 that protrudes forward than the rotary tube 30 so as to be able to move forward and backward, and comes into contact with the friction cloth 152 attached to the outer periphery of the enlarged diameter portion 151 at the tip of the inner tube 28; Inner cylinder 2 of high friction coefficient annular elastic body 153 attached to the inner periphery of the rear end of 7-1 door 150
It is stabilized by contact with the outer periphery of B.

A shallow annular groove 154 into which an elastic body 153 fits when the hood 150 is pulled out is formed near the rear of the enlarged diameter portion 151 of the inner cylinder 28 to stabilize the 7-door 150 in the most pulled out position. I'm making it easy.

On the outer circumference of the rotation @go sleeve 135, there is a manual focus display mark 155 that is exposed when the operating ring 38 is in the manual focus position shown in FIG. 28, and on the outer circumference of the fixed barrel 29,
Autofocus display marks 156 are formed, which are exposed when the operation ring 38 is in the autofocus position shown in FIG. 27. The focusing operation range regulating bar 157 is provided on the inner periphery of the tip of the fixed barrel 29, is implanted in the intermediate ring 46, and regulates the focusing operation range with a nine pin 61.

Also in this structural example, it is possible to connect/disconnect the power transmission between the camera body side drive source and the intermediate ring 46 in conjunction with the switching of the operating ring 38 between the automatic focusing position and the manual focusing position. can.

Effect 1' According to this invention, the rotating member that adjusts the focus by rotating the optical axis Rυ includes an operating ring provided on the fixed part and a driven member for automatic focusing on the camera body side. , and the operating ring releases other unnecessary connections at each position of the automatic focusing position and the manual focusing position set in the optical axis direction. Switching between automatic focusing and manual focusing can be done simply and quickly by simply moving the operating ring in the optical axis direction, regardless of its rotational position.

In addition, in the manual focus state, it does not affect the automatic focus operation system, and in the automatic focus state it does not affect the manual focus operation system, so it is possible to avoid the shadow of the operation ring in the automatic focus state. In the focused state, there is no operational resistance or noise caused by the drive source being driven, or the motor generates electricity, which is beneficial, and the switching operation is simple, allowing you to switch without taking your eyes off the 7-inder. Even if the camera body does not have a focus lock device, you can obtain the same effect as focus lock by switching to manual focus after automatic focusing is completed.

[Brief explanation of the drawing]

゛Figure 1 is a half sectional view showing the lens barrel of the first embodiment of this invention in an automatic focusing state when attached to a camera body,
The figures are partially enlarged sectional views at different positions, Fig. 3 is a half sectional view in the manual focusing state, Fig. 4 is a partially enlarged sectional view at the raised position, and Fig. 5 is from the driven shaft. FIG. 6 is a perspective view of the transmission system up to the passive gear provided on the rotary cylinder, FIG. 6 is a perspective view of the engaging arm provided on the operating ring, and FIG. 7 is a partially enlarged cross-section of the second embodiment in an automatic focusing state. 8 is a partially enlarged sectional view of the manual focusing state, FIG. 9 is a partially enlarged sectional view of the automatic focusing state showing the third embodiment, and FIG. 10 is a partially enlarged sectional view of the manual focusing state. An enlarged sectional view, Fig. 11 is a slope view of the current elastic body with a high friction coefficient, Fig. 12 is a partially enlarged sectional view of the automatic focusing state showing the fourth embodiment, and Fig. 13 is a partial enlarged sectional view of the automatic focusing state showing the fourth embodiment. Figure 14 is an enlarged view of a part, and Figure 14 is a partial slope view showing an example of the current elastic body with a high friction coefficient.
16 is a partially enlarged cross-sectional view of the sixth embodiment in an autofocus state, and FIG.
Fig. 7 is a partially enlarged sectional view of the manual focusing state, Fig. 18 is a partially enlarged sectional view of the manual focusing state, Fig. 19 is a perspective view of the retaining part, and Fig. 20 is the seventh embodiment. FIG. 21 is a partially enlarged cross-sectional view of the automatic focusing state, FIG. 22 is a partially enlarged cross-sectional view of the manual focusing state, and FIG. 23 is a partially enlarged cross-sectional view of the manual focusing state. FIG. 24 is a slope view of the engaging portion driven side showing the eighth embodiment, and No. 251J is a slope view of the 90th embodiment.
FIG. 26 is a half cross-sectional view in an automatic focusing state showing an example, and FIG. 26 is a half cross-sectional view in a manual focusing state, and another example of the transmission structure from the operating ring and driven shaft to the 27th Mn knee 1 rotation. FIG. 28 is a half-sectional view of the automatic focusing state and FIG. 28 is a half-sectional view of the manual focusing state. A...Camera body, B...Lens needle barrel, l...
Automatic focusing device, 13... Drive axis %15... Driven axis,
38...Operation ring, Applicant: Minolta Camera Co., Ltd. Figure 9 Figure 12 Figure 1 Figure 114 Figure 8 Procedural amendment (Hogen August 4, 1981, 1, Display of de) Patent Application No. 59278 G2, Title of the Invention: Lens barrel with automatic manual focus adjustment 3, Relationship with old case for correction Applicant name (607) Minolta Camera Co., Ltd. Souji 4, Agent 5. Description of correction Patent application No. 57-59278 dated July 27, 1980 with instruction for correction Name of the invention Automatic manual focusing lens barrel 2 Claims (1) Automatic camera body A driven member receives the driving force from the focusing device, an operation ring is used for switching between automatic focusing and manual focusing, and manual focusing operation, and the driven member is operated by the driven member during automatic focusing and during manual focusing. The optical system moving device is operated by a sweeping ring to move the optical system in the direction of the optical axis, and has two positions, an automatic focusing position and a manual focusing position, in the direction of the original axis of the operating ring. , a lens barrel capable of automatic manual focusing, in which one focusing operation can be performed by rotating the manual focusing position, an easily movable operating ring is provided, and the automatic focusing of the operating ring is provided. a manual focusing linking means for disconnecting and disconnecting the force between the rotating member of the optical system moving device and the operation ring in conjunction only with the switching movement of the optical axis direction between the position and the manual focusing position; and automatic focusing linkage means for connecting and disconnecting the driving force passing through the driven member, and when the operating ring is in the manual focusing position,
Automatic manual focus adjustment characterized in that only the manual focus linking means is in the connected state, and when the operation ring is in the automatic focusing position, only the automatic focusing linking means is in the connected state. The manual focusing linking means of the lens barrel (2) transmits the operating force through frictional engagement around the optical axis, and is engaged and disengaged by moving the operating ring in the optical axis direction. The automatic manual focusing lens barrel (3) manual focusing linking means is
Consisting of optical axis direction grooves and protrusions, at least one of which is arranged in large numbers around the optical axis, transmits operating force by mutual engagement, and is engaged and disengaged by movement of the operating ring in the optical axis direction. Automatic manual focusing 1I according to claim 1, which is
The automatic focusing linking means of the lens barrel (4) capable of ITFI connects and disconnects the driving force from the camera body side by moving in the optical axis direction in conjunction with the sweeping ring of the driven member. The automatic manual focusing lens barrel (5) according to any one of paragraphs 1 to 3, wherein the automatic focusing linking means is a part of the transmission system from the driven member to the rotating member in the optical axis direction of the operating ring. The automatic manual focusing lens barrel 3 according to any one of claims 1 to 3, which connects and disconnects the driving force from the camera body side in conjunction with movement, details of the invention. Technical Field This invention relates to a driven member that receives driving force from an automatic focusing device of a camera body, an operation ring that is used for switching between automatic focusing and manual focusing, and manual focusing operation, and an automatic focusing device. and an optical system moving device that moves the optical system in the optical axis direction by being rotated by the driven member or by the operating ring during manual focusing, and the operating ring is rotated between the automatic focusing position and the manual focusing position in the optical axis direction. The present invention relates to a lens barrel capable of automatic manual focus adjustment, which has two positions including a focus position and a manual focus operation can be performed by rotation at the manual focus position. Prior Art This type of lens barrel is known, for example, from Japanese Patent Laid-Open No. 151144/1983, which was previously proposed by the applicant of the present invention. This discloses a technique that allows the operating ring to be operated by selecting two positions: an automatic focusing position and a manual focusing position. However, from the standpoint of more detailed and specific disclosure, it remains somewhat inadequate. On the other hand, there is also a device that does not require additional operations using a separate member as described above to switch between automatic focusing and manual focusing.
It is known from the publication No. 05407. However, in order to switch from the automatic focusing position to the manual focusing position, the operating ring must first be rotated to a predetermined rotational position, which is inconvenient. Although there is only one operation, two types of operations are required: moving it along the optical axis mb and in the direction of the optical axis, which is not easy and takes time. In addition, even during manual focusing, the connection between the optical system moving device and the automatic focusing drive means is likely to be disconnected, so unnecessary resistance acts on the manual focusing operation, which is unfavorable in terms of operating feel and operating torque. Noise is likely to occur. Furthermore, there are restrictions on the degree of freedom in design, such as the inability to use an irreversible speed reduction device such as a worm and a worm wheel in the driving force transmission system between the optical system moving device and the automatic focusing drive means. Purpose This invention provides a rotating member that adjusts focus by rotating the optical axis Wl, an operating ring provided on a fixed barrel, and a driven member for automatic focusing on the camera body side. The operating ring is configured to be communicatively linked, and the operating ring releases unnecessary links at each of the automatic focusing position and the manual focusing position set in the optical axis direction, thereby solving the above-mentioned drawbacks of the conventional art. Auto-manual focus adjustable lens m
The purpose is to provide the following. Embodiment To explain the first embodiment shown in FIGS. 1 to 6, FIG. 1 shows a camera body A having an automatic focusing device 1 equipped with a lens mirror 11iB capable of automatic manual focusing. FIG. Explaining the camera body A side, the camera body detachable mount 2 on which the lens barrel B is mounted has a bayonet claw 4 with a bayonet spring 3 disposed on the rear surface, and has a bayonet claw 4 on the rear surface to prevent rattling when the lens barrel B is connected. No binding is guaranteed. The front cover 5 is integrated with the removable mount) 2, and the front cover 5 and the front base plate 6 located behind it,
A positioning release member 7 that can protrude near the detachable mount 2 on the front surface of the front cover 5 is loosely fitted and held so as to be movable forward and backward. The positioning release member 7 is secured to the front cover 5 by a spring 8.
An engagement plate 9 that is biased to protrude to the front and that protrudes laterally is fixed to a part of the plate. The protruding end of the engagement plate 9 is
The release member 7 and the positioning member 11 are engaged with the outer periphery 11j12 of the mount positioning member 11, which is provided so as to be able to protrude from the mount surface 10 of the detachable mounting 2, so that the release member 7 and the positioning member 11 are interlocked. The positioning member 11 is formed in a cylindrical shape, and the distal end portion is fitted into the through hole of the detachable mount 20, and the rear end portion is fitted into the outer periphery of the bearing 14 for the drive shaft 13 of the automatic focusing device 1. It is held so that it can move forward and backward. The bearing 14 is fixed to the front base plate 6. The automatic focusing device [1] transmits a driving force from a driving source (none of which is shown) controlled by a distance measuring device to a driving shaft 13, and the driving shaft 13 is connected to a driven shaft 15 provided in the lens barrel 3. By connecting and driving it, automatic undoing operation is performed, and the optical system continues to move in the focusing direction until the rangefinder detects the focusing state, and as soon as the focusing state is reached, the driving source is turned off. The driving force transmitted from the drive source to the drive shaft 13 to stop the optical system at the in-focus position is transmitted to the gear 16 on the front base plate 6 via a deceleration mechanism (not shown), an intermediate gear train, etc. This is done by further transmitting the signal from the gear 16 to the gear 17 on the drive shaft 13. A movable collar 18 is fitted to the drive shaft 13, and this movable collar 1
8 is pressed against the fixing nail 2o on the drive shaft 13 by the spring 19 which is operated between the bearing work 4 and the drive shaft 13 located in the cylindrical positioning part 11 to the left in the #1 figure. to bias. A movable collar 1 is provided on the inner periphery of the positioning member 11.
A locking step portion 21 is formed to hold the lens barrel B.
is removed from the removable mount 2, the drive shaft 13
The engagement end 13m with the driven shaft 15 of the positioning member 11
This prevents the engagement end portion 13 from protruding from the tip of the engagement end portion 13&. When the lens barrel 3 is properly attached to the removable mount 2, the positioning member 11 is engaged with a positioning groove 23 formed in a part of the mount surface 22 of the lens barrel B by the bias of the spring 8. and locks the lens barrel B in the proper mounting position. The positioning member 11 is engaged with the positioning groove 23 and projected in a state that follows the locking operation of the positioning member 11,
It engages with the driven shaft 15 protruding toward the center of the positioning groove 23, and becomes in a state where driving force can be transmitted to the driven shaft 15. Reference numerals 24 and 25 indicate an oscillator and a stator that constitute a switch of the drive circuit of the drive source (not shown), and the oscillator 24 is
Drive shaft] It is linked to the advance and retreat of lens II!
Only when the N4B is in the state shown in FIG. 1, in which it is mounted in a proper position with respect to the removable mount 2, it contacts the stator 25 and turns on the drive circuit. On the other hand, °, lens barrel B
When the lens barrel B is removed from the removable mount 2, the positioning member 11 and the drive shaft 13 protrude to the maximum from the mount surface lO, and the lens barrel B is attached to the removable mount 2 while the lens barrel B is being attached to the removable mount 2. However, if the positioning member 11 does not yet face the positioning groove 23 even though both mounting surfaces 10 and 22 are in pressure contact, the positioning member 11 and the drive shaft 13 are pushed by the mounting surface z2. By not protruding from the 7971 surface 10, the rocker 24 is removed from the stator 25 and the drive circuit is turned off. Next, a lens barrel B is shown in which a front rinse group 26 and a rear lens group 27 are held in an inner cylinder 2BK, and the focus is adjusted by moving the entire lens barrel in the optical axis direction. The inner cylinder 28 is held by a fixed cylinder 29 via a rotating cylinder 30, and a straight key 31 fixed at the rear end is attached to the fixed cylinder 29.
By engaging a straight groove 32 carved in the inner periphery of the lens 9 in the direction of the optical axis, it is possible to move only in the direction of the optical axis. The rotating cylinder 30 includes an inner cylinder 28 and a fixed cylinder 29.
Helicoidal engagement 33, 34 is applied to both of the cylinders, and when the cylinder is rotated, it rotates relative to both the non-rotating inner cylinder 28 and the fixed cylinder 29, and the helicoidal engagement 34 with the fixed cylinder 29 rotates. The rotating tube 3° itself is moved in the optical axis direction,
Between the inner cylinder 28 and the inner cylinder 28, the inner 11
Move i2B in the optical axis direction. As a result, the inner cylinder 28
It has a so-called double helicoid type focusing structure in which both leads of helicoid engagements 33 and 34 are moved in the spectral axis direction. The fixed barrel 29 has a detachable mount 36 having a mount surface 22 at its base end, and the detachable mount 36 has a bayonet claw 37 that engages with the bayonet claw 4 of the camera body side detachable mount 2. On the outer periphery of the tip of the fixed barrel 29, there is an operation ring 38 which is used for switching between automatic focusing and manual focus and for manual focusing operation.
is fitted so that it can rotate and move in the optical axis direction. A click spring 40, which normally projects slightly inward, is held in an annular groove 39 carved on the inner periphery of the fitting portion of the operating ring 3s ij and the fixed cylinder 29. This click spring 40 is fixed @ 29 21v in the optical axis direction of the outer periphery.
l! By being selectively elastically engaged with the annular locking grooves 41 and 42 formed at the locations, the operating ring 3B can be locked in one of two different positions in the optical axis direction. There is. An auxiliary ring 43 is fitted into the inner periphery of the tip of the fixed cylinder 29, and a fastening ring 44 screwed onto the inner periphery of the fixed cylinder 29 and the fixed cylinder 2
It is fastened between the inner circumferential step portion 45 of No.9. Fastening ring 4
An intermediate ring 46 for transmitting manual focusing operation force from the operating ring 38 to the rotating barrel 30 is fitted on the inner periphery of the fastening ring 44, and a snap ring 47 is elastically fitted on the inner periphery of the front end of the fastening ring 44. It is rotatably held between auxiliary rings 430. The operation ring 38 is provided with a linking member 48 with the first intermediate ring 46 on the inner surface of an inner collar 38& formed at the front end thereof. The linking member 48 is made of a metal spring material, and elastic engagement arms 48b extending rearward are formed by bending at several locations on the inner periphery of a ring base plate 48a attached to the inner surface of the inner flange 38m by screws 49 ( Figure 6). The intermediate ring 46L1 has a passive sleeve 46a located inside each retaining arm 48b at its front end.
& On the outer periphery of the tip, there is an enlarged diameter passive portion 46b on which each engaging arm 48b rides and frictionally engages only when the operating ring 38 is in the forward manual focusing position It (FIGS. 3 and 4). is formed, and the manual focusing operation force from the operation ring 38 is transmitted by the frictional engagement. A bottle 50 installed on the inner circumference of the intermediate ring 46 is attached to the rotary cylinder 30 with a screw 51.
The forward-facing bifurcated passive piece 52 of the passive gear 52 (No. 5171) installed by! By being engaged with L, -
The operating force from the operating ring 38 is transmitted to the rotating cylinder 3°. This allows manual focusing operation using the operation ring 38. The driven shaft 15 is held in the fixed barrel 29 so as to be able to move forward and backward in the optical axis direction, and is linked to the movement of the operating ring 38 in the optical axis direction. The relationship between the driven shaft 15 and the operating ring 38 is such that the operating ring 38 is fixed f,! A metal plate interlocking member 54 is provided in which the arcuate base piece 54a is fitted into the annular groove 53 formed on the inner surface of the fitting part with the annular groove 53 so as to be movable in the circumferential direction with respect to the annular groove 53. Fixed tube 2 to piece 54 &
This is accomplished by bending a radially bifurcated engagement piece 54b that protrudes into the fixed cylinder 29 through the optical axis direction guide slit 55 of No. , only when the operating ring 38 is at the rear automatic focusing position (Figures 1 and 2).
The driven shaft 11 [115Fi] is positioned so that the driving shaft 13 can be engaged, whereas when the operating ring 38 is in the manual focus position (FIGS. 3 and 4) K, the driven shaft 15
9 to a position where the drive shaft 13 cannot engage. The driven shaft rotates 150 times at the first rotation. The transmission is transmitted through the second gear 57, 58 to the intermediate shaft 59 held in the stationary cylinder 29 and the auxiliary ring 43, and further from the third gear 60 through the passive gear 52 (FIG. 5) to the rotating cylinder. communicated to 30,
The automatic focusing device 1 is designed to perform a useless operation. The intermediate ring 46 further has a pin 61 projecting rearward, as shown in FIGS. 2 and 4, which are partially enlarged sectional views taken at slightly different positions from FIGS. 1 and 3. This pin 61 engages with a focusing operation range regulating stopper 62 formed by cutting out a certain angle range on the inner circumference of the auxiliary ring 43, thereby preventing the rotation of the intermediate ring 46 by the operation ring 38. The drivable range is restricted and the inner cylinder 28
This prevents the optical system held in the camera from being operated outside the range from the closest shooting position to the infinite shooting position. As a result of the above, the operation ring 38 is set to #! 1 and 2, the engaging arm 48b is removed from the driven portion 46b, and the frictional engagement between the operating ring 38 and the intermediate ring 46 is released, while the driven shaft 15 is , and is moved to the engagement position with the drive shaft 13. Therefore, the rotary barrel 30 can be driven only by transmission from the driven shaft 15 connected to the drive shaft 13, and automatic focusing operation by the automatic focusing device 1 is performed. However, the rotation of the intermediate ring 46 and the like due to the automatic focusing operation is not transmitted to the operation ring 38. After automatic focusing, if the operating ring 38 is switched to the manual focusing position, the rotary barrel 3o is separated from the drive side, so that the same state as the 7 orca lock can be obtained. When the operating ring 38 is in the manual focusing position shown in FIGS. 3 and 4, the driven shaft 15 is in a position where it cannot be engaged with the drive shaft 13, while the engaging arm 48b is raised on the driven part 46b. frictionally engages. Therefore, the rotary cylinder 30 is operated by the operating ring 38.
It can be driven only by transmission via the frictional engagement from the lens 38, and manual focusing operation using the operating ring 38 is performed. However, the rotation of the rotary barrel 3o and the like due to the manual focusing operation is transmitted to the driven shaft 15, but is not transmitted to the drive shaft 13 because the first driven shaft 15 and the drive shaft 13 are not engaged. Therefore, when the operation ring 38 is operated, there is no operational resistance that causes one drive source to follow, and noise is not generated due to the drive source side being driven, and the motor does not generate electricity, and the drive shaft 13 from the drive source 0 drive shaft 13 that can employ an irreversibly transmittable reducer such as a worm and worm wheel in the transmission system up to
Since the driven shaft 15 is not in the engaged position, the driven shaft 15
Because it moves to the left more than in the case of Figures 1 and 2 where it engages with
Due to the leftward movement, the rocker 24 comes off the stator 25,
The drive circuit of the drive source can be turned off. To switch between the automatic focusing state shown in FIGS. 1 and 2 and the manual focusing state shown in FIGS. This is done by moving in the optical axis direction. Moreover, no matter which rotational position of the operating ring 38 the movement is made, the automatic focusing state is instantly switched to the manual focusing state or vice versa. In the case of manual focusing operation, there are times when it is desired to know the photographing distance using a photographing distance scale.In such a case, for example, a distance scale 63 is provided on the outer periphery of the operation ring 38, and a gauge is placed on the outer periphery of the fixed barrel 29. 64 (FIGS. 1 and 3) are used to adjust the focus using the operation ring 38 until the intermediate ring 46 is regulated by the stopper 62 to the closest photographing state or to the infinite photographing state, and then the adjustment is performed. Turn the operating ring 3 until the distance scale 63 corresponding to the nine photographic images IIK matches the gauge point 64.
8, the frictional engagement between the engaging arm 48b and the passive portion 46b will slip as described above. Therefore, the operating ring 38 is rotated independently to the focus adjustment operating position of the optical system. The actual in-focus photographing distance can be read from the corresponding predetermined rotational position, scale 63, and gauge 64. Since the reference point 64 is exposed only when the operating ring 38 is at the manual focus position, it also serves as a manual focus display mark. In the second embodiment shown in FIGS. 7 and 8, an annular elastic body 71 having a large coefficient of friction, such as rubber, is wound around the outer part of the passive part 46b of the intermediate ring 46, and the operating ring 38 is When switching from the automatic focusing position shown in FIG. 7 to the manual focusing position shown in FIG.
Due to the frictional engagement between b and the elastic body 71, the operation ring 38
This makes it easy to transmit rotation from the ring to the intermediate ring 46. In the third embodiment shown in FIGS. 9 to 11, an annular linking member 81 having an angular cross section is attached to the inner surface of the inner collar 381 of the operating ring 38 with screws 82, and the intermediate ring passive sleeve 46 of the member 81 is Retaining sleeve 81 extending outward
An annular groove 81b is formed on the inner periphery of the tip of the annular groove 81b.
1181b is an annular elastic body 8 with a large friction coefficient such as rubber.
3 is fitted and the operation ring 38 is switched from the automatic focusing position shown in FIG. 9 to the manual focusing position shown in FIG. ◇At the automatic focusing position, the elastic body 83 does not come into contact with the passive sleeve 40a. The elastic body 83 is a tube with a spring 84 inserted into its core and bent into a partially open annular shape as shown in FIG.
1b, and the compression force of the spring 84 strengthens the frictional engagement between the passive part 46b and the elastic body 83. However, in order to prevent the elastic body 83 from slipping within the groove 81b, the fitted state should be considered so that a larger frictional engagement force is exerted between the elastic body 83 and the groove 81b than against the passive part 46b, or the open end should be closed. It is even better to prevent rotation by, for example, engaging a part of the groove 81b. #! The fourth embodiment shown in FIG. 12 and FIG.
In the example shown in FIG. 14, a solid elastic body 91 made of a high friction coefficient elastic material, a tubular elastic body 9''2, or a large diameter portion 93a are formed at appropriate intervals at equal intervals. When the partially different diameter elastic body 93 is fitted and the operating ring 38 is switched from the automatic focus position shown in FIG. 12 to the manual focus position shown in FIG. 13, the attached elastic body 91 etc. However, by raising the passive part 46bK, pressure is applied between the bottom surface of the groove 811) and the outer circumferential surface of the passive part 46b, so that a strong frictional engagement due to a high coefficient of friction, clamping force, and K is obtained. 〇The fifth embodiment shown in FIG. 15 has numerous lines in the optical axis direction on the outer periphery of the passive part 46b in the first embodiment to prevent frictional engagement with the engaging arm 48b. In the sixth embodiment shown in FIGS. 16 to 19, the outer periphery of the passive portion 46b is made stronger. When a large number of retaining grooves 101 in the optical axis direction are disposed in the circumferential direction with which the tip of the engaging arm 48b engages, and the operating ring 38 is switched from the automatic focusing position shown in FIG. 16 to the manual focusing position, At the time of switching, the engaging arm 4
813 is not yet engaged with the locking groove 101 as shown in FIG.
8, at the beginning of the slight rotation, the engagement arm 48
b is opposed to one of the engagement grooves 101 and fitted into it as shown in FIG. 18, and thereafter the rotation of the operating ring 38 can be reliably transmitted to the intermediate ring 46. The maximum idling angle of the operation ring 38 until the engagement arm 48b is fitted into the engagement 11101 can be adjusted by the number of them. For example, if there are 7 engaging arms 48b and 32 engaging grooves 101, the maximum idling angle is about 3°l3'. A plurality of retaining arms 48b are provided for each engagement groove 101.
It is also possible to fit them in at the same time. The more engagement arms 48b that fit together at the same time, the more easily the rotation of the operating ring 38 can be transmitted to the intermediate ring 46, but the number of engagement arms 48b that fit together at the same time can be reduced to one.
In the seventh embodiment shown in FIGS. 0 to 23, the passive part 4
A V-shaped groove in the optical axis direction is continuously provided in the circumferential direction on the outer periphery of the retaining arm 6b, and nine triangular engagement unevenness 111 is formed.
81) has a V that fits into the engagement unevenness 111.
A letter-shaped engagement surface 112 is formed. As a result, when the operating ring 3B is switched from the automatic focusing position shown in FIG. 20 to the manual focusing position, the V-shaped engagement surface 11 of the retaining arm 48b
The probability that 2 will face the peak of the holding unevenness 1'l''1 as shown in Fig. 21 is extremely small, and even if it is in such a -oriented state, it will occur almost at the same time as the operating ring 3B starts to be rotated. , the V-shaped engagement surface 112 disengages from the peaks of the engagement concavities and convexities 111 and falls into the valleys, engaging with the retaining concavities and convexities I'll, and becomes in a state of transmitting the rotation of the operating ring 38 to the intermediate ring 46. , the operating ring 38 hardly slips, resulting in high operating efficiency, and the rotational force is transmitted from the operating ring 3B to the intermediate ring 46 by engagement between the V-shaped engagement surface 112 and the engagement unevenness 111. In the case of WI friction engagement, this is also ensured.If the operation ring 38 is to be rotated excessively beyond the proper focus adjustment range, the V-shaped engagement surfaces 1 and 2 will be engaged with unevenness. ] Trying to get over the 11th mountain, the operation ring 38
Since it provides a relatively strong click resistance to the rotational operation, it is also preferable as a means for reducing excessive operation. In contrast to the chevron-shaped engagement unevenness 111 in the eighth embodiment shown in FIG. 24 and the seventh embodiment, the square engagement unevenness 1
13, and the effect is the same as that of the seventh embodiment.
1 is the same. In the embodiment of the filling 9 shown in FIGS. 25 and 26, the intermediate ring in each of the embodiments described above is omitted, and the passive gear 52 of the rotary cylinder 30 is provided with a passive sleeve 52b extending forward. An enlarged diameter passive portion 52c that frictionally engages with the retaining arm 481) is formed on the outer periphery of the tip, and the operating ring 38
The rotation is transmitted to the passive gear 52 through the frictional engagement, and the operation is similar to that of the first embodiment. The focusing operation range regulating stopper 62 limits the rotation range of the passive gear 520 by engaging a pin 121 formed on the inner periphery of the front surface of the auxiliary ring 43 and implanted in the outer skin of the passive sleeve 52b. It is intended to be regulated. FIG. 25 shows an automatic focusing state, and FIG. 26 shows a manual focusing state. It can be replaced with something. In the above embodiment, a double helicoid type focus adjustment system in which all groups are extended is shown, but other types of focus adjustment systems may also be used, or a combination of the automatic focus position and manual focus position of the operating ring 38 may be used. Rotating barrel 30 and camera body A linked to switching
Direct connection with the side power source is between the drive shaft 13 and the driven shaft 15, for example, between the first gear 57 and the second gear 58, or between the third gear 60 and the passive gear 52. , also the second
This can be done by interlocking one of the transmission points between the gear 58 or the third gear 60 and the intermediate shaft 59 with the switching of the operating ring 38.
Although there is no structure for connecting and disconnecting the transmission part between the camera-side drive source and the rotating barrel 30 in conjunction with the switching operation between the automatic focusing position and the manual focusing position of the operating ring 38, there is a structure integrated in the rotating barrel 30. An example of an automatic manual focusing structure using another transmission type is shown in which the passive gear of 2 is eliminated and the rotation is transmitted to the intermediate ring 46 from both the 1-operation ring 38 and the driven shaft 15. The intermediate ring 46 is fitted into the inner periphery of the fixed cylinder 29, and includes a retaining ring 131 screwed onto the inner periphery of the fixed cylinder 29 from the front.
and the stepped portion 1.32 on the inner periphery of the fixed cylinder 29, so that it can rotate independently without wobbling. intermediate ring 4
An intermediate shaft 5 which is transmitted from a driven shaft 15 is disposed on the inner periphery of the rear end of 6.
A passive internal gear 1'33 that meshes with the third gear 60 on the top 9 is formed, and a portion of the intermediate ring 46 that also protrudes forward beyond the fixed cylinder 29 is used as a passive sleeve 134, and an enlarged diameter passive sleeve is formed on the outer layer of the base side. A portion 1341 is formed. The sweeping ring 38 includes the outer layer of the fixed member 29 and the sleeve 13 that protrudes forward from the intermediate ring 46 of the rotary cylinder 30.
A dustproof cloth 136 is interposed between the dustproof cloth 136 and the dustproof cloth 136 with almost no contact therebetween. A linking mechanism 137 is formed at the center of the inner periphery to frictionally engage the passive part 134 & to transmit rotation from the operating ring 38 to the intermediate ring 46. Modulus annular elastic body 13
9 is activated by switching the operating ring 38 from the automatic focusing position shown in the 27th figure to the manual focusing position shown in the 28th figure.
41 and frictionally engages with it, thereby transmitting the rotation of the operating ring 38 to the intermediate ring 46. The rotational health from the intermediate ring 46 to the rotation tIIi30 is 140K (slits in the optical axis direction of the intermediate ring 460). This is done by fitting a support pin 141 into the outer part of the rotary cylinder 30 and engaging it. A locking collar 143 is formed on the outer periphery of the tip of the fixed cylinder 29 and engages in a groove 142 formed on the inner periphery of the operating ring 38.
The switching range of the operating ring 38 between the automatic focusing position and the manual focusing position is regulated. At the rear of the locking collar 143 of the fixed s29, there is an operation ring 3B.
An enlarged diameter portion 146 is formed on which the high friction coefficient annular elastic body 145 held at 11144 on the inner periphery of the first operation ring 38 runs over when the is switched to the automatic focusing position shown in FIG. An annular groove 147 is formed on the outer periphery of the ring 146, with which the elastic body 145, which is lifted up, is elastically engaged. This stabilizes the operating ring 38 at the autofocus position. The inner cylinder 2B has a linear guide groove 1 carved on its inner circumference.
48 is fixed to the inner periphery of the fixed cylinder 29 so as to be movable only in the axial direction. A hood is attached to the outer periphery of the part of the inner cylinder 28 that protrudes forward from the rotary cylinder 30! 50 is attached so that it can move forward and backward, and the enlarged diameter part 1'5' at the tip of the inner cylinder 28
1 Contact with the friction cloth 152 attached to the outer periphery, and 7 - 150vI! It is stabilized by contact with the outer periphery of the inner cylinder 28 of the high friction coefficient annular elastic body 153 attached to the inner periphery of the end. Near the 11th part of the enlarged diameter part 151 of the inner cylinder 28, there is a 7-door 150.
A shallow annular groove 154 into which the elastic body 153 fits is formed when the 7-door 150 is pulled out the most, making it easier to stabilize the 7-door 150 in the most pulled out position. An operating ring 38 is attached to the outside 11 of the sleeve 135 of the rotating cylinder 30.
A manual focus display mark 155 is exposed when the lens is in the manual focus position shown in FIG. Autofocus display marks 156 are formed respectively. The focusing operation range regulating bar 157 is provided on the inner periphery of the tip of the fixed cylinder 29, is implanted in the intermediate ring 46, and regulates the focusing operation range with the nine pins 61. This structural example Also, the power transmission between the camera body side drive source and the intermediate ring 46 can be connected/disconnected in conjunction with switching of the operating ring 38 between the automatic focusing position and the manual focusing position. Effects According to the present invention, the rotary member that adjusts the focus by rotating the optical axis # has an operating ring provided on the fixed barrel;
Each of the driven members for automatic focusing with respect to the camera body side is communicatively linked, and the operation ring is set at each position IN of the automatic focusing position and the manual focusing position set in the optical axis direction. Since other unnecessary linkages are canceled, switching between automatic focusing and manual focusing is sufficient by moving the operating ring in the direction of the optical axis, regardless of which rotational position it is on the lid. , can be done easily and quickly. Additionally, it does not affect the automatic focusing operation system in the manual focusing state, and since it does not affect the manual focusing operating system in the automatic focusing state, it is possible to avoid the influence of the operating ring in the automatic focusing state, and manual focusing In the state, the drive source side is driven
This is advantageous because there is no operational resistance or noise caused by the autofocus, or the motor generates electricity, and the switching operation is simple and can be done without taking your eyes off the viewfinder. By switching to the in-focus state, the same effect as a focus lock can be obtained even if the camera body does not have a focus lock device. 4. Brief description of the drawings Fig. 1 is a half-sectional view showing the lens barrel of the first embodiment of the present invention attached to a camera body in an autofocus state, and Fig. 2 shows the lens barrel in a different position. Figure 3 is a partially enlarged cross-sectional view in a manual focusing state, Figure 4 is a partially enlarged cross-sectional view at a different position, and Figure 5 is a partial cross-sectional view from the driven shaft to the passive gear provided in the rotating cylinder. FIG. 6 is a perspective view of the transmission system, FIG. 6 is a perspective view of the retaining arm provided in the operating ring, FIG. 7 is a partially enlarged sectional view of the second embodiment in the automatic focusing state, and FIG. 8 is manual focusing. Fig. 9 is a partially enlarged sectional view of the self-heating state showing the third embodiment, Fig. 11 is a slope view of the high friction coefficient annular elastic body, and Fig. #112 is the fourth embodiment. FIG. 13 is a partially enlarged cross-sectional view in an automatic focusing state showing an embodiment, FIG. 14 is a partially enlarged view in a manual focusing state, and FIG. 14 is a partially oblique view showing an example of a high friction coefficient annular elastic body.
FIG. 15 is a slope view of the frictional retaining part of the fifth embodiment, and FIG.
The figure is a partially enlarged sectional view of the automatic focusing state showing the sixth embodiment, Fig. 17 is a partially enlarged sectional view of the manual focusing incomplete state, and Fig. 18 is a partially enlarged sectional view of the manual focusing complete state. 19 is a sectional view of the engaging portion, FIG. 20 is a partially enlarged sectional view of the seventh embodiment in an automatic focusing state, and FIG. 21 is a partially enlarged sectional view of an incomplete manual focusing state. 22 is a partially enlarged sectional view in a fully manual focusing state; FIG. 23 is a slope view of the engaging portion; FIG. 24 is a slope view of the passive side of the retaining portion showing the 80th embodiment; 215
The figure is a half cross-sectional view of the ninth embodiment in the automatic focusing state, FIG. 26 is a half-sectional view of the ninth embodiment in the manual focusing state, and FIG.
FIG. 28 is a half sectional view in an automatic focusing state showing another example of a transmission structure from an operating ring and a driven shaft for one lens, and FIG. 28 is a half sectional view in a manual focusing state. A...Camera body, 3...Lens barrel! ...
Automatic focusing device, 13... Drive axis %15... Driven axis,
38...Operation ring, Applicant: Minolta Camera Co., Ltd.

Claims (1)

[Scope of Claims] (1) A driven member that receives driving force from the automatic focusing device of the camera body, an operation ring that is used for switching between automatic focus and manual focusing, and a manual focusing position; It is equipped with an optical system moving device that is operated by the driven member during focusing and is operated by an operating ring to move the optical system in the optical axis direction during manual focusing. In a lens barrel with automatic manual focus adjustment, which has two positions and a manual focusing position, manual focusing can be performed by rotating and sweeping the manual focusing position.A movable operating ring is attached to a fixed barrel. A manual focusing system is provided which disconnects and disconnects the force between the rotating member of the optical system moving device and the operating ring in conjunction only with the switching movement of the operating ring in the optical axis direction between the automatic focusing position and the manual focusing position. A focus linking means and an automatic focus linking means for connecting and disconnecting the driving force via the driven member to the rotating member are provided, and when the operating ring is in the manual focusing position, only the manual focusing linking means is in a connected state. A lens barrel capable of automatic manual focusing, characterized in that when the operating ring is in the automatic focusing position, only the automatic focusing linking means is in the connected state (2) Manual focusing linking means is a lens mirror capable of automatic manual focusing according to claim 1, which transmits operating force through frictional engagement around the optical axis and is engaged and disengaged by movement of the operating ring in the optical axis direction. The manual focusing linking means is composed of a groove in the optical axis direction and a protrusion, and at least one of them is disposed in large numbers on the optical axis ia and transmits the operating force by engaging with each other to control the light of the operating ring. The automatic manual pointless adjustable lens barrel (4) according to claim 1 of the utility model registration, which is engaged and detached by axial movement, is linked to an operating ring of a driven member. The lens barrel (5) capable of automatic manual focus adjustment according to any one of claims 1 to 3 of the utility model registration claim, which connects and disconnects the driving force from the camera body side by moving in the optical axis direction. The automatic focus linking means connects and disconnects the driving force from the camera body side by linking a part of the transmission system from the driven member to the rotating member with the movement of the operating ring in the optical axis direction. A lens barrel capable of automatic manual focus adjustment according to any one of the ranges 1 to 3.