JP6643068B2 - Drives and optical equipment - Google Patents

Description

The present invention relates to a driving device attached to a lens barrel such as a video camera, a digital camera, and an interchangeable lens.

  For the interchangeable lens and the imaging device, the user manually operates a ring member such as a manual operation ring provided on the lens barrel to move the lens in the lens barrel in the optical axis direction to perform zoom (magnification) or focus. (Focus adjustment). However, in such an interchangeable lens or an image pickup apparatus, for example, when a moving image is picked up, it may be more convenient to be able to perform zooming and focusing by motor driving the lens by an actuator.

  Patent Documents 1 and 2 disclose an optical system which is mounted (externally attached) to a lens barrel of an interchangeable lens capable of zooming by manual operation of a zoom ring, and in which a zoom ring can be rotationally driven by an actuator in response to operation of a zoom switch. A drive is disclosed.

JP 2007-108373 A JP-A-11-014890

  However, as disclosed in Patent Documents 1 and 2, in an optical drive device that is externally attached to a lens barrel and rotationally drives a ring member provided in the lens barrel, a user's operation is performed between the device and the ring member. A space (gap) large enough to allow a finger to enter may be generated. If a finger enters the space while the ring member is being driven to rotate, the finger may be pinched between the ring member and the optical drive device.

The present invention is, for example, and an object thereof is to provide an advantageous drive for such things body is not sandwiched.

Drive motion apparatus according to one aspect of the present invention is attached to an optical apparatus having a rotatable ring member on the outer circumference of the lens barrel. 該駆 braking system includes a drive means for rotating the ring member, when the ring member is rotated by the detecting means and the driving means for detecting an object entering the space between the braking system drive the ring member And control means for performing control to stop driving of the driving means or to reverse the driving direction in response to the detection of the object by the detecting means. The detection means has a contacted portion to which the object can contact, and detects the object by pressing the object against the contacted portion.

According to the present invention, for example, it can be an object body provides an advantageous driving system for the prevent incorporated see today.

FIG. 1 is a side view of a photographing apparatus to which a lens drive unit according to a first embodiment of the present invention is externally attached. FIG. 2 is a front view of the photographing apparatus to which the lens drive unit according to the first embodiment is externally attached. FIG. 5 is a diagram for explaining detection of pinching of a finger in the first embodiment. FIG. 6 is another diagram for describing detection of pinching of a finger in the first embodiment. FIG. 7 is a diagram illustrating an arrangement of a touch panel and a zoom ring according to a second embodiment of the present invention. FIG. 9 is an exploded perspective view of a lens drive unit that is Embodiment 3 of the present invention. FIG. 13 is a front sectional view of a lens drive unit according to a third embodiment. FIG. 13 is an exploded cross-sectional view of the lens drive unit according to the third embodiment. FIG. 13 is a perspective view of a pinch detection member according to the third embodiment. FIG. 13 is a perspective view of a base member according to the third embodiment. FIG. 14 is a view for explaining the movement of a pinch detection member according to the third embodiment. FIG. 10 is a side view of the lens drive unit according to the third embodiment. FIG. 9 is an enlarged sectional view of a lens drive unit that is Embodiment 4 of the present invention. FIG. 13 is an enlarged sectional view of a lens drive unit that is Embodiment 5 of the present invention. FIG. 14 is a sectional view of a lens drive unit according to a fifth embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIGS. 1 and 2 show a lens drive unit (hereinafter simply referred to as a drive unit) 50 as an optical drive device according to a first embodiment of the present invention. The drive unit 50 is attached (externally attached) to the lens barrel 1 provided in the camera 60 provided with the image sensor 60a. The lens barrel 1 may be provided integrally with the camera (optical device) 60, or may be provided as an interchangeable lens (optical device) that is detachable from the camera 60.

  1 and 2, the direction in which the optical axis o of the lens barrel 1 extends (optical axis direction) is defined as the Z direction, and the subject side and the image side in the Z direction are defined as the front side and the rear side, respectively. Further, among the directions orthogonal to the Z direction, the up-down direction in the figure is defined as the Y direction, and the direction (left-right direction) orthogonal to the Z direction and the Y direction is defined as the X direction. FIG. 1 shows the camera 60 and the drive unit 50 including the lens barrel 1 as viewed from the X direction, and FIG. 2 shows them as viewed from the front.

  The lens barrel 1 has a zoom (magnification) function. A zoom ring (ring member) 2 is provided on the outer periphery of the lens barrel 1 so as to be rotatable around the optical axis. By rotating the zoom ring 2, one or more lens groups in the lens barrel 1 move in the Z direction, and zoom is performed. The zoom ring 2 can be manually rotated (that is, zoomed) by the user, and can be electrically driven and rotated by the drive unit 50.

  The drive unit 50 is attached to the lens barrel 1 such that the main body (base member) 3 is located below the lens barrel 1 in the Y direction. The main body 3 holds a motor M for rotating and driving the zoom ring 2 therein, and further rotatably holds a transmission gear 4 for transmitting an output of the motor M to the zoom ring 2. Driving means is constituted by the motor M and the transmission gear 4. Further, the main body 3 has a mounting portion 6 for mounting the main body 3 to the lens barrel 1. The main body 3 (that is, the drive unit 50) attached to the lens barrel 1 is disposed so that a space (gap) is formed between the main body 3 and the zoom ring 2. At this time, the transmission gear 4 meshes with a gear (not shown) provided on the outer periphery of the zoom ring 2.

  In this embodiment, the case where the main body 3 of the drive unit 50 is attached to the lens barrel 1 will be described. However, the main body 3 may be attached to the camera 60 such that the main body 3 is located below the lens barrel 1.

  Further, the main body 3 includes a drive ON / OFF switch (not shown) for switching between manual driving (manual zoom) and electric driving (electric zoom) of the zoom ring 2, and an electric motor is provided on the side of the main body 3 in the X direction. A zoom switch 11 for performing a zoom operation is provided. The zoom switch 11 is a slide switch that can be slid in the Y direction or a seesaw switch (rocker switch) that can perform a seesaw operation in the XY plane. When the zoom switch 11 is operated to the upper telephoto (T) side in the Y direction, the control unit (control means) C drives the motor M in a rotation direction in which zooming to the telephoto side is performed. Of course, the zoom switch 11 may be a slide switch that can be slid in the Z direction or a seesaw switch that can perform a seesaw operation (swing) in the XZ plane.

  When the zoom switch 11 is operated to the lower wide-angle (W) side, the controller C drives the motor M in the rotation direction in which zooming to the wide-angle side is performed. The output of the motor M is transmitted to the zoom ring 2 via the transmission gear 4, and the zoom ring 2 is driven to rotate, thereby performing the electric zoom to the telephoto side or the wide-angle side.

  On the left and right sides of the upper surface of the main body 3 on the side of the zoom ring 2, a user who enters a space (first space and second space) between the main body 3 and two different circumferential portions of the zoom ring 2. Touch panels 5_1 and 5_2 to which an object such as a finger can contact are provided. The touch panels 5_1 and 5_2 are detection means (first detection means and second detection means) for detecting an object entering the space. Each of the touch panels 5_1 and 5_2 is configured by a pressing sensor (piezoelectric film or the like) that presses (presses) an object against a contacted part on its surface, that is, detects a pressing force and outputs a detection signal corresponding to the pressing force. Have been.

  The touch panels 5_1 and 5_2 extend so as to have a length b in the Z direction (that is, a first direction corresponding to the optical axis direction). Since the length b is longer than the length a of the zoom ring 2 in the same direction, the touch panels 5_1 and 5_2 are arranged along the entire area of the width a of the zoom ring 2.

  The control unit C controls the motor M according to a detection signal from at least one of the touch panels 5_1 and 5_2. In this embodiment, the case where the object is the finger of the user will be described, but the object may be a finger other than the user or an object other than the finger such as a stick.

  Next, a function of preventing a finger from being pinched between the zoom ring 2 and the drive unit 50 (the main body 3) will be described with reference to FIGS.

  FIGS. 3 and 4 show how the user's hands holding the camera 60 for shooting support (hold) the camera 60 and the drive unit 50. 3 shows a case where the zoom ring 2 rotates in a first rotation direction (counterclockwise as viewed from the front) c. FIG. 4 shows a case where the zoom ring 2 rotates in the second rotation direction (clockwise as viewed from the front). The case of rotating to f is shown.

  In each case, the user holds the grip unit 8 of the camera 60 with the right hand 10 and holds the drive unit 3 with the left hand 9 from below. Since the user can select the manual zoom or the electric zoom by operating the drive ON / OFF switch provided in the drive unit 3, the user's finger can touch both the zoom ring 2 and the drive unit 3 at any time. It is in. Therefore, when the zoom ring 2 is rotationally driven for electric zoom, the user's finger may enter the space between the zoom ring 2 and the main body 3 of the drive unit 50.

  For example, as shown in FIG. 3, when the user operates the zoom switch 11 with the thumb 9_1, he does not pay attention to the position of the other finger (here, the index finger) 9_2, and the index finger 9_2 is carelessly moved. The rotating zoom ring 2 may be touched. That is, when the index finger 9_2 that has entered the first space d between the zoom ring 2 and the main body 3 touches the zoom ring 2 while the zoom ring 2 is rotating in the first rotation direction c, the index finger 9_2 is moved. The rotating zoom ring 2 is pressed against the main body 3 in the direction e. As a result, the index finger 9_2 is sandwiched between the zoom ring 2 and the main body 3.

  In addition, as shown in FIG. 4, a zoom ring in which the fingertip of the thumb 9_1 rotates when the zoom switch 11 is operated to the T side with the belly of the thumb 9_1 or when the drive unit 50 is stably held by the hand. There is a possibility to touch 2. When the fingertip of the thumb 9_1 that has entered the second space g between the zoom ring 2 and the main body 3 touches the zoom ring 2 while the zoom ring 2 is rotating in the second rotation direction f, the thumb 9_1 is pressed against the main body 3 in the h direction by the rotating zoom ring 2. As a result, the thumb 9_1 is sandwiched between the zoom ring 2 and the main body 3.

  In this embodiment, in order to prevent the finger from being pinched between the rotating zoom ring 2 and the main body 3 in this embodiment, the user's finger touching the rotating zoom ring 2 is pressed against the touch panels 5_1 and 5_2. Detect that it was done.

  The touch panels 5_1 and 5_2 always output a detection signal to the control unit C according to the pressing force acting on the surface when the zoom ring 2 is electrically driven. When the finger contacts the zoom ring 2 and is pressed against the touch panels 5_1 and 5_2, the pressing force indicated by the detection signal increases. When the pressing force is equal to or larger than the predetermined value, the control unit C determines that there is a possibility that a finger may be pinched between the zoom ring 2 and the main body 3 and stops driving the motor た り or sets the driving direction. Is controlled (pinching avoidance control). Thereby, pinching of the finger between the zoom ring 2 and the main body 3 is avoided. Note that the control for stopping the driving of the motor い う here includes a case where an instruction is given to the motor M not to rotate and a case where no instruction is sent to the motor M.

  Further, as shown in FIGS. 3 and 4, regions (spaces d and g) where a possibility of pinching a finger differs depending on the rotation directions c and f of the zoom ring 2. For this reason, in the present embodiment, the touch panels 5_1 and 5_2 are provided on both left and right sides centered on the straight line PP in two regions divided by a straight line PP passing through the optical axis o and the center of the drive unit 50 in the X direction. Provided. For this reason, even if the zoom ring 2 is electrically driven in any rotation direction, pinching of a finger can be avoided.

  In the present embodiment, the case where the pinching avoidance control is performed when the pressing force as the pressing force of the finger on the touch panel is equal to or larger than the predetermined value has been described. However, the pinching avoidance control may be performed when the pressure due to the pressing of the finger is equal to or greater than the predetermined value. In this case, a pressure-sensitive sensor is used as a touch panel.

  Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, another arrangement example of the touch panel described in the first embodiment will be described. The arrangement is the same as that of the first embodiment except for the arrangement of the touch panel.

  In some cases, the touch panel cannot be provided longer than the width of the zoom ring as in the first embodiment due to design restrictions and the like. In this case, as shown in FIGS. 5A, 5B, and 5C, a touch panel 5 having a length b shorter than the width a of the zoom ring 2 may be arranged. 5A, the touch panel 5 is located at the center in the width direction of the zoom ring 2, in FIG. 5B, the touch panel 5 is located at the rear side in the width direction of the zoom ring 2, and in FIG. It is arranged on the front side in the width direction. Of course, the width a of the zoom ring 2 and the width of the contacted portion may be the same.

  In each of the embodiments described above, the case where the ring member provided on the lens barrel is a zoom ring for performing a zoom operation has been described, but the ring member may be a focus ring for performing a focus operation, an iris ring for performing an aperture operation, or the like. Alternatively, a ring member other than the zoom ring may be used.

  Further, in each embodiment, the case where the touch panel as the pressure-sensitive sensor is used as the detecting means for detecting the pressing of the object is described, but other detecting means may be used as long as the pressing force can be detected.

  Further, in the embodiment of the present invention, the case where the main body 3 of the drive unit 50 is disposed at the lower position of the lens barrel 1 has been described, but the main body 3 is disposed at any position in the circumferential direction of the lens barrel. You may.

  6, 7, and 8 show a lens drive unit (hereinafter simply referred to as a drive unit) 104 as an optical drive device according to a third embodiment of the present invention. The drive unit 104 is attached (externally attached) to a lens barrel 101 provided in a camera (not shown). The lens barrel 101 may be provided integrally with the camera, or may be provided as an interchangeable lens that is detachable from the camera. 6 to 8, the direction (optical axis direction) in which the optical axis o of the lens barrel 101 extends is defined as the Z direction, and the subject side and the image side in the Z direction are defined as the front side and the rear side, respectively. Further, among the directions orthogonal to the Z direction, the up-down direction in the figure is the Y direction, and the direction orthogonal to the Z direction and the Y direction (left-right direction) is the X direction.

  FIG. 6 is an exploded view of the drive unit 104 before being attached to the lens barrel 101, and FIG. 8 is a cross-sectional view of the drive unit 104 before being attached to the lens barrel 101 as viewed from the front side. FIG. 7 shows a cross section of the drive unit 104 attached to the lens barrel 101 as viewed from the front side.

  The lens barrel 101 has a zoom (magnification) function. A zoom ring (ring member) 102 is provided on the outer periphery of the lens barrel 101 so as to be rotatable around the optical axis. By rotating the zoom ring 102, one or more lens groups in the lens barrel 101 move in the Z direction, and zoom is performed. The zoom ring 102 can be manually rotated (that is, zoomed) by the user, and can be driven to rotate electrically by the drive unit 104.

  The drive unit 104 is disposed such that its main body (base member) 108 is positioned below the lens barrel 101 in the Y direction, and is provided with three screws 122 as attachment members shown in FIGS. 6 and 8. It is attached to 101. As shown in FIG. 7, the main body 108 holds therein a motor M for driving the zoom ring 102 to rotate, and rotatably holds a transmission gear 105 for transmitting the output of the motor M to the zoom ring 102. . Driving means is constituted by the motor M and the transmission gear 105.

  The main body 108 of the drive unit 104 attached to the lens barrel 101 is arranged so that a space (gap) is formed between the main body 108 and the zoom ring 102. At this time, the transmission gear 105 meshes with a gear portion 103 provided on the outer periphery of the zoom ring 102.

  In this embodiment, the case where the main body 108 of the drive unit 104 is attached to the lens barrel 101 will be described. However, the main body 108 may be attached to the camera such that the main body 108 is located below the lens barrel 101.

  The main body 108 includes a drive ON / OFF switch (not shown) for switching between manual driving (manual zoom) and electric driving (electric zoom) of the zoom ring 2 and a zoom switch for performing electric zoom operation. (Not shown). When the zoom switch is operated to the telephoto side, the control unit (control means) C drives the motor M in a rotation direction in which zooming to the telephoto side is performed.

  When the zoom switch is operated to the wide-angle side, the control unit C drives the motor M in the rotation direction in which zooming to the wide-angle side is performed. The output of the motor M is transmitted to the zoom ring 102 via the transmission gear 105, and the zoom ring 102 is rotationally driven, so that the electric zoom to the telephoto side or the wide-angle side is performed.

  In FIG. 7, portions A and B surrounded by dotted lines are user's fingers that have entered a space (first space and second space) S between two different circumferential portions of the zoom ring 102 and the main body 108. And the like (hereinafter referred to as a finger). Finger detection units (first detection means and second detection means) A and B respectively connect the center (optical axis) of the lens barrel 101 and the center of the drive unit 104 in the X direction as shown in FIG. It is provided on both sides in the X direction across the straight line PP.

  The finger detection units A and B are provided on the left and right sides of the upper surface of the main body 108 on the zoom ring 102 side, and the detection members 107 (107A and 107B) constituting the contacted parts to which the finger F can make contact, and switch elements as contact switches. 119. The detecting member 107 extends in the Z direction (that is, a first direction corresponding to the optical axis direction) longer than the length of the zoom ring 102 in the same direction. An apex (convex portion) 120 facing the zoom ring 102 (the lens barrel 101) is formed above the detection member 107.

  When the finger F is pressed against the vertex 120 of the detection member 107 formed in this way and the detection member 107 moves (rotates as described later), the switch element 119 is turned on, and the detection signal from the switch element 119 is output. Is output.

  In this embodiment, the case where the object is the finger of the user will be described, but the object may be a finger other than the user or an object other than the finger such as a stick.

  Hereinafter, the detailed configuration and operation of the finger detection units A and B will be described. FIG. 9 shows the detection member 107 (the detection members 107A and 107B are the same member) in an enlarged manner. FIG. 10A shows the main body 108 before attaching the detecting member 107 when viewed obliquely from the front, and FIG. 10B shows a part of the main body 108 when obliquely viewed from the rear.

  Reference numeral 109 denotes a shaft formed at both ends in the longitudinal direction of the detection member 107, and reference numeral 110a denotes a shaft engagement hole formed in the main body. 110b is a shaft supporting groove formed in the main body 108, and 111 is a pressing member. Reference numeral 112 denotes a shaft pressing portion formed on the pressing member 111. The detection member 107 is configured such that one and the other shaft portions 109 are inserted into the shaft engagement hole portion 110a and the shaft support groove portion 110b, respectively, and the pressing member 11 is screw-fixed to the main body 108 so as to cover the shaft support groove portion 110b. Thus, the main body 108 is rotatably held about the shaft 109. The upper surface of the shaft engaging hole 110a and the shaft pressing portion 112 of the pressing member 111 have a V-groove shape.

  Thus, the movement (play) of the shaft portion 109 of the detection member 107 in the X direction is suppressed. Reference numeral 117 denotes a semi-cylindrical convex surface formed on both sides and the center of the detecting member 107 in the longitudinal direction. The detecting member 107 rotates while sliding the semi-cylindrical convex surface 117 against a semi-cylindrical concave surface 118 formed on the main body 108. I do.

  Reference numeral 113 denotes a leaf spring as an elastic member, which is disposed in a spring holding groove 114 formed in the main body 108 and urges the detection member 107 upward in the Y direction, that is, in the direction of an initial rotation position of the detection member 107 described later. are doing. In addition, a material other than a leaf spring such as a coil spring or rubber may be used as the elastic member. Reference numeral 115 denotes a switch pressing portion formed so as to extend downward from the longitudinal center of the detection member 107.

  The switch element 119 is electrically connected to the control unit C via a flexible substrate (not shown). The switch element 119 is fixed inside the main body 108 using a double-sided tape or the like. The switch element 119 is turned on by being pressed by the switch pressing portion 115 of the detection member 107 rotated from the initial rotation position, and outputs a detection signal.

  Reference numeral 116 denotes a stopper formed on the main body 108. When the switch pressing portion 115 of the detection member 107 urged by the leaf spring 113 contacts the stopper portion 116, the rotation of the detection member 107 beyond the initial rotation position is prevented.

  Hereinafter, the operation of the finger detection unit A will be described. The operation of the finger detection unit B is basically the same as the operation of the finger detection unit A, but the rotation direction of the detection member 107B is opposite to the rotation direction of the detection member 107A. Further, the clockwise direction and the counterclockwise direction indicate the turning direction when viewed from the front side.

  FIG. 11A shows a cross section viewed from the front side of the finger detection unit A in a state where the finger is not pressed against the detection member 107A. A side (opening side of the space S) near the right side in the X direction (a second direction orthogonal to the first direction) of the main body 108 is defined as an outer side, and a side farther from the right side (a rear side of the space S) is defined as a side. Inside.

  The shaft 109 is provided inside the detection member 107A, and the leaf spring 113 is disposed so as to urge the outside of the detection member 107A outside the shaft 109 upward. As a result, the detection member 107A is urged in the counterclockwise direction around the shaft portion 109, and is held at the initial rotation position when the switch pressing portion 115 comes into contact with the stopper portion 116.

  As shown in FIG. 7, when the vertex 120 of the detection member 107A is pressed downward with the finger F, the shaft 109 is positioned inside the detection member 107A (inner than the vertex 120) when viewed from the front. Since it is provided, the detection member 107A rotates clockwise around the shaft 109. At this time, actually, the shaft portion 109 is slightly separated from the V-groove-shaped upper surface of the shaft engagement hole portion 110a and the V-groove-shaped shaft pressing portion 112 of the pressing member 111, and the semi-cylindrical convex surface 117 becomes a semi-cylindrical concave surface. Touch 118. For this reason, the detection member 107A rotates while sliding the semi-cylindrical convex surface 117 with respect to the semi-cylindrical concave surface 118.

  FIG. 11B is a cross-sectional view when the vertex 120 of the detection member 107A is pressed by the finger F as viewed from the front side as shown in FIG. The detection member 107 </ b> A is pressed with a pressing force of a magnitude against the urging force of the leaf spring 113 (that is, a magnitude exceeding a predetermined value), so that the detection member 107 </ b> A rotates clockwise from the initial rotation position around the shaft 109, that is, Is rotated in a direction in which the outer portion moves away from the zoom ring 102. Then, when the switch pressing portion 115 provided on the detection member 107A presses the switch element 119 to turn it on, a detection signal is output from the switch element 119.

  Reference numeral 121 denotes a stopper formed on the main body 108. When the detection member 107A rotated clockwise abuts on the stopper 121, the rotation of the detection member 107A exceeding the maximum rotation position which is the rotation position at that time is performed. Movement is blocked. This prevents the switch element 119 from being excessively pressed by the switch pressing portion 115 and damaged.

  In this embodiment, as described above, the leaf spring 113 is used as the elastic member. When the detection member 107A rotates from the initial rotation position and reaches the maximum rotation position, the amount of deformation of the leaf spring 113 in the Y direction becomes maximum and the length in the Z direction also becomes maximum. For this reason, in this embodiment, the length of the spring holding groove 114 in the Z direction is longer than the length in the Z direction when the amount of deformation of the leaf spring 113 is maximized.

  Accordingly, when the detection member 107A rotates from the initial rotation position, both ends in the Z direction of the leaf spring 113 abut against both ends of the spring holding groove 114 in the same direction, and the detection member 107A rotates to the maximum rotation position. This prevents the plate spring 13 from being unable to move and from being plastically deformed.

  Next, the easiness of detection of the finger F that has entered the space S between the main body 108 and the zoom ring 102 in the drive unit 104 of the present embodiment will be described with reference to FIG. In a state where the finger F has not entered the space S or a state where the finger F which has entered the space S does not press the detection member 107A as shown in FIG. 7, the detection member 107A is urged in the counterclockwise direction to perform the initial rotation. It is held in the moving position. In this state, the distance between the vertex 120 of the detection member 107A and the zoom ring 102 is small. For this reason, the finger F that has entered the space S (or the finger F that has been pressed downward by touching the zoom ring 102 that is driven to rotate clockwise) can easily press the detection member 107A clockwise.

  Therefore, the switching element 119 is also easily turned on, and the detection signal from the switching element 119 is easily input to the control unit C. The control unit C that has received the detection signal performs control (pinching avoidance control) to stop driving of the motor た り or reverse the driving direction, as in the first embodiment. This can prevent the finger from being pinched between the zoom ring 102 and the main body 108.

  When the detection member 107A rotates clockwise, the apex portion 120 retracts in a direction away from the zoom ring 102. Therefore, it is possible to prevent the finger F from being pinched between the detection member 107A and the zoom ring 102.

  FIG. 12 illustrates the lens barrel 101 to which the drive unit 104 according to the present embodiment is attached when viewed from the X direction. The length of the detection member 107 (107A, 107B) in the Z direction is longer than the length of the zoom ring 102 in the same direction. For this reason, the detection member 107 is arranged along the entire length of the zoom ring 102. This makes it possible to detect the entry of a finger into the space between the zoom ring 102 and the main body 108 at any position in the Z direction.

  In the case where the detection member 107 cannot be provided longer than the length of the zoom ring 102 due to design restrictions or the like, as described in the second embodiment (FIGS. 5A, 5B, and 5C), A detection member having a length shorter than the length of the zoom ring 2 may be provided.

  According to the present embodiment, a finger that has entered the space between the zoom ring 102 and the drive unit 104 (the main body 108) can be easily detected and pinch avoidance control can be performed. The finger can be prevented from being pinched between them.

  Next, a drive unit 204 according to a fourth embodiment of the present invention will be described with reference to FIG. This embodiment is a modification of the third embodiment. FIG. 13 is an enlarged view of a finger detection unit A ′, which replaces the finger detection unit A in the third embodiment, of the two finger detection units provided on both sides in the X direction of the drive unit 204 according to the third embodiment when viewed from the front. Is shown. The Z direction, the Y direction, and the X direction are the same as in the third embodiment.

  The finger detection unit A 'includes a detection member 207A that is provided on the upper surface of the main body 208 of the drive unit 204 on the zoom ring 102 side and forms a contacted part, and a switch element 219 that is a pressure sensor or a pressure-sensitive sensor. The detection member 207A extends in the Z direction (that is, a first direction corresponding to the optical axis direction) longer than the length of the zoom ring 102 in the same direction. As in the third embodiment, the detecting member 207A is rotatably held by the main body 208 via shaft portions 209 provided at both ends in the longitudinal direction.

  An apex (convex) 220 facing the zoom ring 102 is formed on the upper part of the detection member 207A, as in the third embodiment. However, in the present embodiment, the shaft portion 209 is provided on an outer portion of the detection member 207A than on the inner portion where the apex portion 220 is provided. Therefore, the detecting member 207A rotates counterclockwise around the shaft 209.

  Reference numeral 217 denotes a semi-cylindrical convex surface formed on both sides and the center of the detecting member 207A in the longitudinal direction. The detecting member 207A rotates while sliding the semi-cylindrical convex surface 217 against a semi-cylindrical concave surface 218 formed on the main body 208. I do.

  Reference numeral 213 denotes a leaf spring as an elastic member, which is disposed in a spring holding groove 214 formed in the main body 208 and attaches an inner portion of the detection member 207A to an upper side in the Y direction, that is, a direction of the initial rotation position of the detection member 207A. I'm going. The leaf spring 213 urges an inner portion of the detection member 207A inside the shaft portion 209 upward. Thus, the detection member 207A is urged clockwise around the shaft 209. Also in this embodiment, a material other than a leaf spring such as a coil spring or rubber may be used as the elastic member. 215 is a switch pressing portion formed to extend downward from the longitudinal center of the detecting member 207A.

  FIG. 13 shows a state where the finger F has entered the space S between the zoom ring 102 and the main body 208. When the vertex 220 of the detecting member 207A is pressed by the finger F with a pressing force of a size (a size exceeding a predetermined value) against the urging force of the leaf spring 213, the detecting member 207A initially rotates around the shaft 209. Rotate clockwise from the position.

  When the switch pressing portion 215 provided on the detection member 207A presses the switch element 219, a detection signal is output from the switch element 219. Also in the present embodiment, the control unit C (not shown) having received the detection signal performs the pinch avoidance control of the motor M (not shown) in the drive unit 204 as in the third embodiment. Accordingly, it is possible to avoid a finger being pinched between the zoom ring 102 and the main body 208.

  The detection member 207A whose vertex 220 is pressed by the finger F rotates counterclockwise around the shaft 209 located outside the vertex 220 from the initial rotation position. Here, the vertex 220 of the detection member 207A at the initial rotation position is located inside a straight line D connecting the center of the zoom ring 102 and the center of the shaft 209 (actually, the semi-cylindrical convex surface 217). . The vertex 220 and the zoom ring 102 come closest to each other when the vertex 220 is located on the straight line D.

  For this reason, in this embodiment in which the apex 220 is located inside the straight line D, the apex 220 is pressed by the finger F and the detection member 207A rotates counterclockwise from the initial rotation position. The distance between the vertex 220 and the zoom ring 102 does not decrease. That is, the inner part of the detection member 207A where the apex 220 is provided rotates in a direction away from the zoom ring 102. Therefore, in the present embodiment, the finger F is unlikely to be pinched between the detection member 207A and the zoom ring 102 even though the vertex 220 is located inside the shaft 209.

  In this embodiment, the operation of the finger detection unit (not shown, but B ′) in place of the finger detection unit B in the third embodiment is such that the rotation direction of the detection member is the detection member of the finger detection unit A ′. The operation is basically the same as that of the finger detection unit A ', except that the operation is the reverse of that of 207A.

  Next, a drive unit 304 according to a fifth embodiment of the present invention will be described with reference to FIGS. This embodiment is a modification of the third embodiment. FIG. 14 is a cross-sectional view of the two finger detection units provided on both sides in the X direction of the drive unit 304 according to the present embodiment as viewed from the front side of the finger detection unit A ″ instead of the finger detection unit A according to the third embodiment. FIG. 15 shows a cross section of the finger detection unit A ″ viewed from the X direction. The Z direction, the Y direction, and the X direction are the same as in the third embodiment.

  The finger detection unit A ″ includes a detection member 307A that is provided on the upper surface of the main body 308 of the drive unit 304 on the zoom ring 102 side and configures a contacted part, and a switch element 319 that is a contact switch. The detection member 307A is disposed in the holding groove 313a formed in the lens 208, and extends in the Z direction (that is, the first direction corresponding to the optical axis direction) longer than the length of the zoom ring 102 in the same direction. Is movable in the Y direction with respect to the main body 308. A vertex (convex portion) 320 facing the zoom ring 102 is formed at an upper portion of the detection member 307A.

  Reference numeral 313 denotes a coil spring as an elastic member, which urges the detection member 307A upward in the Y direction, that is, in the direction of the initial position in the holding groove 313a. In this embodiment, two coil springs 313 are provided near both ends in the longitudinal direction of the detection member 307A. The elastic member may be other than a coil spring such as a leaf spring or rubber. 315 is a switch pressing portion formed to extend downward from the longitudinal center of the detecting member 307A.

  When the vertex portion 320 of the detection member 307A is pressed with a pressing force of a size (a size exceeding a predetermined value) against the urging force of the coil spring 313 with a finger, the detection member 307A moves Y from the initial position with respect to the main body 308 from the initial position. Go straight down in the direction. Then, when the switch pressing portion 315 provided on the detecting member 307A presses the switch element 319, a detection signal is output from the switch element 319. Also in this embodiment, the control unit C (not shown) that has received the detection signal performs the pinch avoidance control of the motor M (not shown) in the drive unit 304 as in the third embodiment. This can prevent the finger from being pinched between the zoom ring 102 and the main body 308.

  In this embodiment, the switch pressing portion 315 and the switch element 319 are arranged at the center in the longitudinal direction of the detection member 307A. Thus, even if any position in the longitudinal direction of the detection member 307A is pressed by a finger, the switch pressing portion 315 turns on the switch element 319 to avoid pinching of the finger.

  Each embodiment described above is only a typical example, and various modifications and changes can be made to each embodiment when the present invention is implemented.

1,101 Lens barrel 2,102 Zoom ring (ring member)
3, 108, 208, 308 Main body 4, 105 Transmission gear 5_1, 5_2 Touch panel 50, 104, 204, 304 Lens drive unit 7A, 7B, 107A, 107B, 207A, 307A Detection member 19, 119, 219, 319 Switch element C control Unit (control means)

Claims (11)

A drive operated device that is mounted in an optical apparatus having a rotatable ring member on the outer circumference of the lens barrel,
Driving means for rotating the ring member,
Detecting means for detecting an object entering the space between the ring member and the drive device,
Control means for performing control to stop driving of the driving means or to reverse the driving direction in response to the detection of the object by the detection means when the ring member is rotationally driven by the driving means. Have
Said detecting means, said object has a contacted portion that can contact, drive kinematic device you characterized in that the object to detect the object by being pressed against the contacted portion. It said detection means, driving a kinematic device according to claim 1, wherein the contact portion and detects the object by being pressed by a predetermined value or more force or pressure. Said detection means, driving a kinematic device according to claim 1 or 2, characterized in that it is configured to include a pressing sensor or pressure sensor. Said detection means, driving a kinematic device according to claim 1 or 2, characterized in that it comprises a contact switch. The contacted portion is provided so as to extend in a first direction corresponding to the direction of the optical axis of the front Symbol barrel,
The width in the first direction of the contact part, drive as claimed in any one of the four claim 1, wherein the wider than in the first direction of the ring member Motion device. The contacted portion, any one of claims 1 to 5, characterized in that around an axis extending in a first direction corresponding to the direction of the optical axis of the front Symbol barrel is provided rotatably drive braking system according to one paragraph. The contact portions has a said far inner portion from the side surface than the shaft close the outer portion on the side surface of the driving apparatus than the shaft have you in a second direction perpendicular to the first direction,
Drive braking system according to claim 6, wherein the outer portion before Symbol object is pressed, characterized in that the pivoting in a direction away from the ring member. The contact portions has a said far inner portion from the side surface than the shaft close the outer portion on the side surface of the driving apparatus than the shaft have you in a second direction perpendicular to the first direction,
Drive braking system according to claim 6, wherein the inner portion before Symbol object is pressed, characterized in that the pivoting in a direction away from the ring member. The contact portions are drive braking system as claimed in any one of the preceding claims, characterized in that provided movably straight proceeds 4. As the detecting means, before Symbol Ring different each other in the circumferential direction of the member, the first detection means for detecting a first space and a second spatial each intruding object body as space, respectively, and the second drive braking system as claimed in any one of the preceding claims, characterized in that it has detection means 9. A lens barrel,
An optical apparatus characterized by having a, a driving braking system according to any one of claims 1 to 10 which kicked Replacing the barrel.