JP3839888B2 - DRIVE DEVICE, DEVICE USING THE SAME, OPTICAL DEVICE - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive device that can selectively perform so-called auto (power) drive and manual (manual) drive without requiring a special switching operation, and is particularly suitable when a vibration type motor is used as a drive source for auto drive. The present invention relates to a drive device.
[0002]
[Prior art]
Conventionally, a lens barrel with a built-in vibration type motor that can perform an autofocus operation with an annular vibration type motor built into the lens barrel and can also perform a manual focus operation without requiring a special switching operation. ing.
[0003]
In such a lens barrel driving device, for example, as proposed in Japanese Patent Laid-Open No. 2-253216, a power transmission member for transmitting a driving force of a vibration type motor and a driving force for manual operation are provided. There is a planetary mechanism type member that includes an operation force transmission member that transmits the planetary gear and a planetary roller that contacts these transmission members, and the rotation support shaft of the planetary roller is provided on an output member that drives the lens.
[0004]
One example is a lens barrel shown in FIG. In this figure, reference numeral 101 denotes a support cylinder for holding each component of the lens driving device. Reference numeral 102 denotes an annular vibrating body (hereinafter referred to as a stator) that constitutes a vibration type motor. Reference numeral 103 denotes an electromechanical energy conversion element that is joined to one end face of the stator 102 and excites vibration in the stator 102. Reference numeral 104 denotes a vibration absorber such as felt pressed against the surface of the electro-mechanical energy conversion element 103. Reference numeral 105 denotes a disc spring that urges the vibration absorber 104 and the stator 102 forward in the optical axis direction (leftward in the figure). It is.
[0005]
Reference numeral 106 denotes a nut that is screwed into a screw portion formed on the outer diameter of the support cylinder 101 to adjust the pressure applied to the disc spring 105. Reference numeral 107 denotes a rotation stopper that is integrally held on the outer diameter of the support cylinder 101 and restricts the rotation of the stator 102. Reference numeral 108 denotes a rotating body (hereinafter referred to as a rotor) that receives a rotational force around the optical axis from the vibrating stator 102, and reference numeral 110 denotes an automatic coupling plate that rotates integrally with the rotor 109 via a rubber ring 109.
[0006]
Reference numeral 111 denotes an output rotating cylinder having a plurality of shafts 111a extending in the radial direction around the optical axis, and a roller 112 is rotatably attached to the shaft 111a. Further, a focus key 115 is attached to the output rotating cylinder 111 to transmit the rotation of the output rotating cylinder 111 to a lens driving cam ring (not shown). Reference numeral 113 denotes a manual connecting plate that rotates together with a manual operation member (not shown).
[0007]
The roller 112 is sandwiched between and in contact with the auto connecting plate 112 and the manual connecting plate 113. For example, when the driving force of the vibration type motor is transmitted to the auto connecting plate 112 and rotates around the optical axis, the manual connecting plate 113 is rotated. Since the rotation is restricted by friction with the lens barrel via the manual operation member, the roller 112 revolves around the optical axis together with the output rotating cylinder 111 while rotating. The rotation of the output rotating cylinder 111 is transmitted to the cam ring via the focus key 115, and the lens is driven in the optical axis direction by the cam ring.
[0008]
On the other hand, when the driving force from the manual operation member is transmitted to the manual connecting plate 113 and rotates around the optical axis, the auto connecting plate 112 is restricted from rotating by the friction between the rotor and the stator in the vibration type motor. 112 revolves around the optical axis together with the output rotating cylinder 111 while rotating, and the rotation is transmitted to the cam ring via the focus key 115 to drive the lens in the optical axis direction.
[0009]
In this way, the lens can be driven without performing a special switching operation only by operating the vibration type motor or operating the manual operation member.
[0010]
By the way, in the lens apparatus as described above, for manual focus, in order to facilitate fine adjustment of the lens position (focus), there is little demand for increasing the lens drive speed relative to the operation speed of the manual operation member. On the other hand, for autofocus, there is a strong demand for higher lens driving speed.
[0011]
[Problems to be solved by the invention]
However, in the conventional lens barrel described above, the driving force of the vibration type motor is decelerated by the planetary mechanism and transmitted to the output member. To increase the transmission speed to the output member, it is only necessary to increase the driving speed of the vibration type motor. However, if the driving speed of the vibration type motor is increased, the positioning control of the motor becomes difficult, and auto focus control There arises a problem that the accuracy of the error tends to deteriorate.
[0012]
Further, in the lens barrel shown in FIG. 4, the connecting plates 110 and 113 and the roller 112 are pressed against each other by using the pressing force between the stator 102 and the rotor 108 in the vibration type motor generated by the disc spring 105. Therefore, it is difficult to optimally set both the pressure contact force between the stator 102 and the rotor 108 and the pressure contact force between each of the connecting plates 110 and 113 and the roller 112.
[0013]
Therefore, the present invention provides a drive device that can increase the autofocus without increasing the drive speed of the vibration type motor and that can optimally set the necessary pressure contact force in each part, and a device and an optical device using the drive device. It is intended to provide.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a power transmission member that transmits a driving force by a driving source, an operation force transmission member that transmits a driving force by a manual operation, and an output from which the driving force is transmitted from these transmission members In a drive device having a member, a planetary rotating member that contacts the operating force transmission member and the output member is provided, and a shaft portion that rotatably supports the planetary rotating member is provided on the power transmission member.
[0015]
That is, for example, an operation force transmission member can be obtained while securing the advantage of the conventional drive device that can selectively rotate the output member by the drive force of the drive source and the drive force of the manual operation without requiring a special switching operation. The rotation of the power transmission member is transmitted to the output member at a constant speed (or decelerated as will be described later) only by the rotation of the planetary rotation member, while the rotation of the power transmission member is increased by the combination of the revolution and rotation of the planetary rotation member. Can be transmitted to the output member.
[0016]
The planetary rotating member is provided with a first outer diameter portion and a second outer diameter portion having a different outer diameter from the first outer diameter portion, for example, the operating force transmission member is brought into contact with the first outer diameter portion having a large diameter, While bringing the output member into contact with the second outer diameter portion having a small diameter, the speed reduction rate in the rotation transmission from the operating force transmission member to the output member is increased as compared with the case where both outer diameter portions have the same outer diameter. The speed increasing rate in the rotation transmission from the power transmission member to the output member may be reduced.
[0017]
Further, when the drive source in the above invention is a vibration type motor that relatively drives the vibrating body whose vibration is excited by the electro-mechanical energy conversion and the contact body that is in pressure contact with the vibrating body, the vibrating body and the contact body In addition to the first pressurizing unit that press-contacts the output member, a second pressurizing unit that press-contacts the output member, the operating force transmission member, and the planetary rotating member is provided, and the press-contact force between the vibrating body and the contact body and the output It is desirable that the pressure contact force between the member and the operating force transmission member and the planetary rotating member can be set optimally.
[0018]
The driving device is particularly suitable for an optical apparatus that uses the output member as a member for driving the lens in the optical axis direction.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
1 and 2 show a lens barrel that is a first embodiment of the present invention. In this figure, 1 is a focusing lens group, and 2 is a fixed lens group. Reference numeral 3 denotes a first group barrel that holds the focusing lens group 1, and includes a driving roller 3a that engages with a guide cylinder 5 and a cam cylinder 6 described later. Reference numeral 4 denotes a second lens barrel that holds the fixed lens group 2 and is held integrally with the guide tube 5.
[0020]
Reference numeral 5 denotes a guide cylinder that supports the first group barrel 3 so as to be slidable in the optical axis direction, and fits and holds the cam ring 6 rotatably. Further, the guide cylinder 5 is formed with a claw 5a for restricting the movement of the cam ring 6 in the optical axis direction, and further, a rectilinear groove 5b with which the driving roller 3a is engaged is formed.
[0021]
The cam ring 6 is formed with a cam 6a with which the driving roller 3a of the first group barrel 3 is engaged, and a projection 6b with which an output rotary cylinder 26 described later is engaged to transmit the rotation. Formation Has been.
[0022]
Reference numeral 7 denotes an aperture unit, which is held by the second group barrel 4. Reference numeral 8 denotes a fixed cylinder that holds the guide cylinder 5 and a support cylinder 11 described later. Reference numeral 9 denotes a focus operation ring, which is a guide cylinder 5 and a fixed cylinder. 8 And is held rotatably around the optical axis. The focus operation ring 9 is engaged with a manual connection ring 32 (described later) via a connection claw 9a to connect to the connection ring 32. In Transmits rotation. A mount 10 is attached to the fixed cylinder 8 and mechanically engages with a camera body (not shown).
[0023]
Reference numeral 11 denotes a unit support cylinder that supports each component of the drive unit in the lens barrel, and is held by the fixed cylinder 8. Reference numeral 12 denotes an annular vibration member (hereinafter referred to as a stator) that constitutes a vibration type motor and has a trapezoidal cross section. Reference numeral 13 denotes an electro-mechanical energy conversion element that is joined to one end face of the stator 12 and excites vibrations in the stator 12. Reference numeral 14 denotes an annular vibration absorber made of felt or the like pressed against the surface of the electromechanical energy conversion element 13. Reference numeral 15 denotes a first disc spring (first pressurizing means in the claims) that urges the vibration absorber 14 in the optical axis direction. Reference numeral 16 denotes a first nut that is screwed into a screw portion formed on the outer diameter of the unit support cylinder 11 to adjust the pressure applied to the first disc spring 15.
[0024]
Reference numeral 17 denotes a rotation stopper that is integrally held on the outer periphery of the unit support cylinder 11 and restricts the rotation of the stator 12 around the optical axis. Reference numeral 18 denotes a rotating body (hereinafter referred to as a rotor) that receives pressure from the stator 12 and receives a rotational force around the optical axis. Reference numeral 21 denotes an automatic connection ring that rotates integrally with the rotor 18 via a rubber ring 19.
[0025]
Support shafts 23 are integrally provided at a plurality of locations in the circumferential direction of the unit support cylinder 11, and bearing rollers 22 are rotatably attached to the support shafts 23. The end surface of the auto-connecting ring 21 is in contact with the motor side portion of the rolling surface of the bearing roller 22, and receives pressure from the first disc spring 15 at this contact portion. The bearing roller 22 has a configuration in which an inner ring 22a and an outer ring 22b are connected by a bearing ball 22c in order to eliminate a shaft loss with the support shaft 23.
[0026]
Reference numeral 24 denotes a roller support ring (a power transmission member in the claims), which is engaged with the auto coupling ring 21 so as to be integrally rotatable. Support shafts 24a extending in the radial direction about the optical axis are provided at a plurality of circumferential locations (for example, three locations) in the roller support ring 24. A planetary roller 25 is rotatably attached to these support shafts 24a. The planetary roller 25 has a first outer diameter portion 25a having a large outer diameter (φA1) and a second outer diameter portion 25b having a small outer diameter (φA2). The first outer diameter portion 25a is divided and formed so as to sandwich the second outer diameter portion 25b in the axial direction, thereby preventing the roller 25 from falling due to a force acting in the radial direction on each outer diameter portion. ing.
[0027]
Reference numeral 26 denotes an output rotating cylinder, which has a contact surface that contacts the second outer diameter portion 25b of the planetary roller 25 and a claw portion 26a that engages with the cam ring 6 so as to be integrally rotatable. The output rotary cylinder 26 is rotatably held by a bearing support cylinder 28 supported by the unit support cylinder 11 via a plurality of bearing balls 27. Reference numeral 29 denotes a ball pressing ring that prevents the bearing ball 27 from escaping from the bearing support cylinder 28.
[0028]
Reference numeral 30 denotes a second disc spring (second pressurizing means in the claims), and by urging the bearing support cylinder 28 rearward in the optical axis direction (rightward in the figure), The diameter portion 25b and the output rotary cylinder 26 are brought into pressure contact with each other, and the first outer diameter portion 25a of the planetary roller 25 is brought into pressure contact with a later-described manual connection ring 32. Reference numeral 31 denotes a second nut that is screwed into a screw portion formed on the outer periphery of the unit support cylinder 11 and adjusts the pressing force of the second disc spring 30.
[0029]
In the present embodiment, the first disc spring 15 that generates a pressure contact force between the stator 12 and the rotor 18 of the vibration type motor, and the pressure contact force between the planetary roller 25, the output rotary cylinder 26, and the manual connection ring 32 are generated. Since the second disc spring 30 is provided separately, by adjusting the positions of the first and second nuts 16 and 31, the pressurizing force of each disc spring is set to the optimum pressurizing force, that is, the first disc. The spring 15 can be easily applied with a pressure that can bring out the maximum performance of the vibration motor, and the second disc spring 30 can be easily applied with a pressure that does not cause slippage between the planetary roller 25, the output rotary cylinder 26, and the manual connection ring 32. Can be set.
[0030]
Reference numeral 32 denotes a manual connection ring that can transmit rotation from the focus operation ring 9 and is in pressure contact with the first outer diameter portion 25 a of the planetary roller 25. Reference numeral 33 denotes a holding ring that rotatably holds the manual connection ring 32, and is held integrally with the unit support cylinder 11.
[0031]
Next, the operation of the lens barrel configured as described above will be described. When the user of the lens barrel operates a focusing switch (not shown) to perform autofocus, a voltage is applied to the electro-mechanical energy conversion element 13 from a control circuit (not shown) and proceeds to the stator 12 in the circumferential direction. Vibration is excited. When the stator 12 vibrates, the rotor 18 that is pressed against the stator 12 by the pressure of the first disc spring 15 is rotationally driven, and the rubber ring 19, the coupling ring 21 The roller support ring 24 rotates integrally with the rotor 18 around the optical axis.
[0032]
At this time, since the rotation of the focus operation ring 9 and the manual connection ring 32 is restricted by friction with the guide cylinder 5 and the like, the roller support ring 24 rolls the planetary roller 25 along the end surface of the manual connection ring 32. Rotate around the optical axis. That is, the planetary roller 25 revolves around the optical axis while rotating around the support shaft 24a. Therefore, the rotation of the roller support ring 24 and the rotation of the planetary roller 25 are combined and transmitted to the output rotation cylinder 26, and the output rotation cylinder 26 is rotated at an increased speed with respect to the roller support ring 24.
[0033]
Here, when φA1: φA2 is set to 2: 1, the rotation output cylinder 26 is increased to a rotation speed of 1.5 times with respect to the roller support ring 24 and rotates around the optical axis. That is, since the circumference of the second outer diameter portion 25b with which the output rotating cylinder 26 abuts is half of the circumference of the first outer diameter portion 25a with which the manual connection ring 32 abuts, the output by rotation of the planetary roller 25 is achieved. The rotation amount transmitted to the rotary cylinder 26 is halved relative to the rotation amount of the roller support ring 24, and this amount is added to the rotation amount of the roller support ring 24 and transmitted to the output rotary cylinder 26.
[0034]
When the output rotating cylinder 26 is rotationally driven, the cam ring 6 engaged with the output rotating cylinder 26 rotates integrally, so that the first group barrel 3 is driven in the optical axis direction by the action of the cam 6a and the driving roller 3a. Auto focusing is performed. As described above, since the rotational speed of the output rotary cylinder 26 and the cam ring 6 is 1.5 times the rotational speed of the vibration type motor, autofocusing is performed at a high speed.
[0035]
On the other hand, when the user manually rotates the focus operation ring 9, this rotation is transmitted to the manual connection ring 32. At this time, since the vibration type motor is not operating, the rotation of the roller support ring 24 is restricted by the friction between the stator 12 and the rotor 18. Therefore, the rotation of the manual connection ring 32 is transmitted to the output rotating cylinder 26 only by the rotation of the planetary roller 25.
[0036]
Here, when φA1: φA2 is set to 2: 1, the rotation output cylinder 26 is decelerated 0.5 times with respect to the manual connection ring 32 and rotates around the optical axis. That is, since the circumference of the second outer diameter portion 25b with which the output rotating cylinder 26 abuts is half of the circumference of the first outer diameter portion 25a with which the manual connection ring 32 abuts, the output by rotation of the planetary roller 25 is achieved. The amount of rotation transmitted to the rotary cylinder 26 is half of the amount of rotation of the manual connection ring 32.
[0037]
When the output rotating cylinder 26 is rotationally driven, the cam ring 6 engaged with the output rotating cylinder 26 rotates integrally, so that the first group barrel 3 is driven in the optical axis direction by the action of the cam 6a and the driving roller 3a. Manual focusing is performed. As described above, since the rotation speed of the output rotary cylinder 26 and the cam ring 6 is 0.5 times the rotation speed of the manual connection ring 32 and the focus operation ring 9, manual focusing is performed at a low speed.
[0038]
(Second Embodiment)
FIG. 3 shows a lens barrel that is a second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are not described.
[0039]
A unit support cylinder 51 holds each component of the drive unit in the lens barrel, and is held by the fixed cylinder 8. Reference numeral 52 denotes a vibration type motor, which is an annular stator having a trapezoidal cross section. An electro-mechanical energy conversion element 53 is joined to one end surface of the stator 52 and excites vibrations in the stator 52. Reference numeral 54 denotes an annular vibration absorber made of felt or the like pressed against the surface of the electromechanical energy conversion element 53. Reference numeral 55 denotes a first disc spring (first pressurizing means in the claims) that urges the vibration absorber 54 and the stator 52 in the optical axis direction. Reference numeral 56 denotes a first nut that is screwed into a screw portion formed on the outer periphery of the unit support cylinder 51 and adjusts the pressing force of the first disc spring 55.
[0040]
Reference numeral 57 denotes a rotation stopper that is integrally held on the outer periphery of the unit support cylinder 51 and restricts the rotation of the stator 52 around the optical axis. A rotor 58 is in pressure contact with the stator 52 and receives a rotational force around the optical axis.
[0041]
Reference numeral 60 denotes a roller support ring (power transmission member referred to in the claims), which is connected to the rotor 58 through a rubber ring 59 so as to be integrally rotatable. Supporting shafts 60a extending in the radial direction about the optical axis are provided at a plurality of circumferential positions (for example, three locations) in the roller support ring 60. A planetary roller 61 is rotatably attached to these support shafts 60a. The planetary roller 61 has a first outer diameter portion 61a having a large outer diameter (φA1) and a second outer diameter portion 61b having a small outer diameter (φA2). The first outer diameter portion 61a is divided and formed so as to sandwich the second outer diameter portion 61b in the axial direction, thereby preventing the roller 61 from collapsing due to the force acting on each outer diameter portion in the radial direction. ing.
[0042]
Reference numeral 62 denotes an output rotating cylinder, which has a contact surface that contacts the second outer diameter portion 61 b of the planetary roller 61 and a claw portion 62 a that engages with the cam ring 6 so as to be integrally rotatable. The output rotary cylinder 62 is rotatably held by a bearing support portion formed on the unit support cylinder 51 via a plurality of bearing balls 63. Reference numeral 64 denotes a ball pressing ring which prevents the bearing ball 63 from escaping from the bearing support portion.
[0043]
Reference numeral 65 denotes a manual connection ring that can transmit rotation from the focus operation ring 9. Reference numeral 66 denotes a holding ring that rotatably holds the manual connection ring 65. Reference numeral 67 denotes a second disc spring (second pressurizing means referred to in the claims), which urges the holding ring 66 forward in the optical axis direction so that the second outer diameter portion 61b of the planetary roller 61 and the output rotary cylinder 62 are urged. And the first outer diameter portion 61a of the planetary roller 61 and the manual connection ring 65 are pressed against each other. Reference numeral 68 denotes a second nut that is screwed into a screw portion formed on the outer periphery of the unit support cylinder 51 and adjusts the pressing force of the second disc spring 67.
[0044]
In the present embodiment, the first disc spring 55 that generates a pressure contact force between the stator 52 and the rotor 58 of the vibration type motor, and the pressure contact force between the planetary roller 61, the output rotary cylinder 62, and the manual connection ring 65 are generated. Since the second disc spring 67 is provided separately, by adjusting the positions of the first and second nuts 56 and 68, the pressurizing force of each disc spring is set to the optimum pressurizing force, that is, the first disc. The spring 55 can be easily applied with a pressure that can bring out the performance of the vibration type motor to the maximum, and the second disc spring 65 can be easily applied with a pressure that does not cause slipping between the planetary roller 61, the output rotary cylinder 62, and the manual connection ring 65. Can be set.
[0045]
Next, the operation of the lens barrel configured as described above will be described. When the user of the lens barrel operates a focusing switch (not shown) to perform autofocus, a voltage is applied from a control circuit (not shown) to the electro-mechanical energy conversion element 53 and proceeds to the stator 52 in the circumferential direction. Vibration is excited. When the stator 52 vibrates, the rotor 58 that is pressed against the stator 52 by the pressure of the first disc spring 55 is rotationally driven, and the rubber ring 59 and the roller support ring 60 rotate integrally with the rotor 58 around the optical axis.
[0046]
At this time, since the rotation of the focus operation ring 9 and the manual connection ring 65 is restricted by friction with the guide tube 5 and the like, the roller support ring 60 rolls the planetary roller 61 along the end surface of the manual connection ring 65. Rotate around the optical axis. That is, the planetary roller 61 revolves around the optical axis while rotating around the support shaft 61a. Therefore, the rotation of the roller support ring 60 and the rotation of the planetary roller 61 are combined and transmitted to the output rotation cylinder 62, and the output rotation cylinder 62 is rotated at an increased speed with respect to the roller support ring 60.
[0047]
Here, when φA1: φA2 is set to 2: 1, the rotation output cylinder 62 is increased to a rotation speed of 1.5 times with respect to the roller support ring 60 and rotates around the optical axis. In other words, since the circumference of the second outer diameter portion 61b with which the output rotary cylinder 62 abuts is half of the circumference of the first outer diameter portion 61a with which the manual connection ring 65 abuts, the rotation is caused by the rotation of the planetary roller 61. The rotation amount transmitted to the rotary cylinder 62 is halved with respect to the rotation amount of the roller support ring 60, and this amount is added to the rotation amount of the roller support ring 60 and transmitted to the output rotary cylinder 62.
[0048]
When the output rotary cylinder 62 is rotationally driven, the cam ring 6 engaged with the output rotary cylinder 62 rotates integrally, so that the first group barrel 3 is driven in the optical axis direction by the action of the cam 6a and the driving roller 3a. Auto focusing is performed. As described above, since the rotation speed of the output rotary cylinder 62 and the cam ring 6 is 1.5 times the rotation speed of the vibration type motor, autofocusing is performed at a high speed.
[0049]
On the other hand, when the user manually rotates the focus operation ring 9, this rotation is transmitted to the manual connection ring 65. At this time, since the vibration type motor is not operating, the rotation of the roller support ring 60 is restricted by the friction between the stator 52 and the rotor 58. Therefore, the rotation of the manual connection ring 65 is transmitted to the output rotating cylinder 62 only by the rotation of the planetary roller 61.
[0050]
Here, when φA1: φA2 is set to 2: 1, the rotation output cylinder 62 is decelerated 0.5 times with respect to the manual connection ring 65 and rotates around the optical axis. In other words, since the circumference of the second outer diameter portion 61b with which the output rotary cylinder 62 abuts is half of the circumference of the first outer diameter portion 61a with which the manual connection ring 65 abuts, the rotation is caused by the rotation of the planetary roller 61. The amount of rotation transmitted to the rotating cylinder 62 is half that of the manual coupling ring 65.
[0051]
When the output rotary cylinder 62 is rotationally driven, the cam ring 6 engaged with the output rotary cylinder 62 rotates integrally, so that the first group barrel 3 is driven in the optical axis direction by the action of the cam 6a and the driving roller 3a. Manual focusing is performed. As described above, since the rotation speed of the output rotary cylinder 62 and the cam ring 6 is 0.5 times the rotation speed of the manual connection ring 65 and the focus operation ring 9, manual focusing is performed at a low speed.
[0052]
In the above embodiments, the case where the outer diameters of the first outer diameter portions 25a and 61a of the planetary rollers 25 and 61 are larger than the outer diameters of the second outer diameter portions 25b and 61b has been described. For example, if the outer diameters of both the outer diameter portions are the same, the rotational speed of the output rotary cylinders 26 and 62 is twice that of the rotation from the vibration type motor side, and the manual connection ring For the rotation from 32, 65, it is the same magnification. Further, if the outer diameters of the second outer diameter portions 25b and 61b are made larger than those of the first outer diameter portions 25a and 61a, the rotation speed of the output rotary cylinders 26 and 62 is increased with respect to the rotation from the vibration type motor side. In addition, the speed can be increased with respect to the rotation from the manual connection rings 32 and 65.
[0053]
In the above embodiments, the case where the manual connection rings 32 and 65 and the focus operation ring 9 are directly connected has been described. However, a speed reduction mechanism or a speed increase mechanism may be interposed therebetween.
[0054]
Further, in each of the above embodiments, the lens barrel has been described. However, the present invention is not limited to the lens barrel as long as the invention has a configuration in which the output member is selectively driven by power and manual operation force. It can also be applied to devices other than optical devices.
[0055]
【The invention's effect】
As described above, according to the present invention, the advantage of the conventional driving device in which the rotational driving of the output member by the driving force of the driving source and the driving force of the manual operation can be selectively performed without requiring a special switching operation. The rotation of the operating force transmission member is transmitted to the output member at a constant speed or reduced only by the rotation of the planetary rotation member while the rotation of the power transmission member is synthesized by the revolution and rotation of the planetary rotating body. The speed can be increased and transmitted to the output member. Therefore, if this drive device is used for lens focus drive, it is possible to realize an optical device that can easily perform fine focus adjustment by manual operation and can perform autofocus at high speed.
[0056]
If the planetary rotating member is provided with a first outer diameter portion and a second outer diameter portion having a different outer diameter from the first outer diameter portion, the reduction rate and power in the rotation transmission from the operating force transmission member to the output member The speed increase rate in the rotation transmission from the transmission member to the output member can be freely set.
[0057]
Further, when a vibration type motor is used as a drive source, a pressurizing unit that presses the output member and the operating force transmission member against the planetary rotating member is a pressurizing unit that pressurizes the vibrating body and the contact body in the vibration type motor. If separately provided, the pressure contact force between the output member and the operating force transmission member and the planetary rotating member and the pressure contact force between the vibrating body and the contact body can be easily set optimally.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a lens barrel that is a first embodiment of the present invention.
FIG. 2 is a partial plan development view of the lens barrel of the first embodiment.
FIG. 3 is a cross-sectional view of a lens barrel that is a second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a driving unit in a conventional lens barrel.
[Explanation of symbols]
1 Focus lens group
2 Fixed lens group
3 First lens barrel
4 Second lens barrel
5 guide tube
6 Cam ring
7 Aperture unit
8 Fixed cylinder
9 Focus control ring
10 mount
11, 51 Unit support tube
12,52 stator
13,53 Electro-mechanical energy conversion element
14,54 Vibration absorber
15, 55 1st disc spring
16, 30, 56, 68 Nut
17, 57 Non-rotating
18, 58 rotor
19,59 Rubber ring
21 Auto connecting ring
22 Bearing roller
23 Spindle
24, 60 Roller support ring
25, 61 Planetary roller
26, 62 Output rotating cylinder
27, 63 Bearing ball
28 Bearing support cylinder
29, 64 ball holding ring
30, 67 Second disc spring
32,65 Manual connection ring
33, 66 retaining ring

Claims (5)

A power transmission member that transmits a driving force by a vibration type motor that relatively drives a vibrating body that is excited by electro-mechanical energy conversion and a contact body that is in contact with the vibrating body, and an operating force that transmits a driving force by a manual operation a transmission member, a drive device driving force is an output member which is transmitted from these transmitting member,
A planetary rotating member disposed between and in contact with the operating force transmission member and the output member ;
A shaft member provided on the power transmission member and rotatably supporting the planetary rotation member;
First pressurizing means for press-contacting the vibrating body and the contact body;
A drive device comprising: a second pressurizing unit that press-contacts the output member, the operation force transmission member, and the planetary rotating member . The planetary rotating member is provided with a first outer diameter portion and a second outer diameter portion having a different outer diameter from the first outer diameter portion,
2. The driving device according to claim 1, wherein the operating force transmission member is brought into contact with the first outer diameter portion, and the output member is brought into contact with the second outer diameter portion.   The drive device according to claim 2, wherein the first outer diameter portion has an outer diameter larger than that of the second outer diameter portion. A driving device according to any one of claims 1 to 3, device characterized in that it comprises a driven member driven by said output member. In the optical apparatus having the drive device according to any one of claims 1 to 3 and a lens movable in the optical axis direction,
The optical device, wherein the output member is a member that drives the lens in an optical axis direction.

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