JP2011123407A - Lens device, pan head device and pan head system using them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens device which can keep operation performance of a pan head device nearly constant, prior to and after changing the lens device, and to provide a pan head device and a pan head system which use them. <P>SOLUTION: The pan head system is used, by replacing at least two or more kinds of different lens devices to an imaging section, provided integrally with an operation section of at least one of pan operation around a vertical axis and tilt operation around a horizontal axis in order to change a photographing direction. The operation section of the pan head device is provided with a weight and a butting section, provided integrally with the weight, movable in an optical axis direction, and the lens device is provided with a holding section. When the lens device is mounted to the imaging section, the butting section and the holding section contact each other; the weight moves to a predetermined position in the optical axis direction at the nearly same time as mounting of the lens device to the pan head device; and the value of the moment about the axis of rotation of the operating section is set to be within a predetermined range. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lens device and a pan head device, and more particularly to a lens interchangeable pan head system.

  Conventionally, when the lens device is attached to and detached from the pan head device, it is necessary to adjust the position of the center of gravity according to the lens device to be attached.

  For example, in Patent Document 1, in order to eliminate the adjustment of the center of gravity when an accessory is added to the camera unit mounted on the camera platform device, a cloud that makes the center of gravity around the drive axis substantially coincide with the drive axis when the accessory is attached. A stand apparatus is disclosed. In Patent Document 2, in order to eliminate the adjustment action when exchanging the unit including the photographing lens, the type of the lens device is determined, and the posture adjustment range of the pan head device, the speed when changing the posture, and the posture change according to the determination result A method of controlling the pan head device for changing the initial speed at the start is disclosed.

JP 2003-121918 A JP 2007-143058 A

  However, in the prior art disclosed in Patent Document 1 described above, the balance of the center of gravity is improved only after the accessory is attached, and thus the operation performance of the pan / tilt head device may change before and after the accessory is attached. Further, in the prior art disclosed in Patent Document 2, since the type of lens device is recognized and the posture adjustment parameter of the pan head device is changed, the operation of the pan head device changes depending on the type of lens device to be attached.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lens device, a pan head device, and a cloud using the same that make it possible to make the operation performance of the pan head device substantially constant without adjusting the position of the center of gravity when replacing the lens device. Is to provide a stand system.

  In order to achieve the above object, the present invention provides an image pickup unit that is provided integrally with at least one of a pan operation around a vertical axis and a tilt operation around a horizontal axis in order to change a shooting direction. A pan head system that uses at least two different types of lens devices by replacing them with each other. The operating portion of the pan head device includes a weight and an abutment portion that is provided integrally with the weight in the optical axis direction. The lens device is provided with an engaging portion, and when the lens device is attached to the imaging unit, the abutting portion and the engaging portion come into contact with each other to the pan head device of the lens device. The weight is moved to a predetermined position in the optical axis direction substantially at the same time as the attachment of the moving portion, and the value of the moment around the rotation axis of the operating portion is set within a predetermined range.

  According to the present invention, the balance around the horizontal axis can be appropriately adjusted without adjusting the position of the center of gravity when replacing the lens device of the pan head device. Therefore, even when a plurality of different types of lens devices are attached to the pan head device, it is possible to provide a pan head system having stable operation performance.

Typical configuration of the pan head system of the present invention Configuration of the pan head apparatus of the first embodiment of the present invention Configuration when the lens device 3a is attached to the pan head device of the first embodiment of the present invention Configuration when the lens device 3b is attached to the pan head device of the first embodiment of the present invention Structure of fixing means of optical axis method position of weight Configuration of biasing means for optical axis method position of weight Configuration of the pan head apparatus of the second embodiment of the present invention Configuration when the lens apparatus 3a is attached to the pan head apparatus of the second embodiment of the present invention Configuration when the lens device 3b is attached to the pan head device of the second embodiment of the present invention Configuration for combined use of center of gravity position adjustment motor Configuration when the lens device 3a is attached to the pan head device of the third embodiment of the present invention Configuration when the lens device 3b is attached to the pan head device of the third embodiment of the present invention

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a typical configuration of a pan head system according to an embodiment of the present invention.

  Hereinafter, a pan head system according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a typical configuration of the pan head system of the present invention.

  The pan / tilt head device 1 performs a panning operation that rotates around the vertical axis in the direction of arrow P with the power of the driving unit 1a and a tilting operation that rotates around the horizontal axis in the direction of the arrow T with the driving force of the driving unit 1b.

  An imaging unit 2 is integrally provided in the tilt operation unit of the camera platform device 1, and lens devices 3a and 3b having different optical performances are attached to the imaging unit 2 in an interchangeable manner.

  The pan / tilt head device 1 receives an operation signal from the controller 4 via the distributor 5 and the network 6, and changes the shooting direction by performing a pan operation and a tilt operation.

  The captured video signal is displayed on the display device 7 via the network 6 and the distributor 5.

  FIG. 2 shows the configuration of the pan / tilt head device according to the first embodiment of the present invention.

  The imaging unit 2 provided integrally with the tilt operation unit rotating around the horizontal axis H is provided with a fixing ring 2a for fixing the lens device and a guide hole 2b for passing the guide portion 8a of the weight 8. The weight 8 can be moved in the optical axis direction.

  An abutting portion 9 is provided at the tip of the guide portion 8a, and the abutting portion 9 also serves to prevent the guide portion 8a from coming off.

  FIG. 3 shows a configuration when the lens device 3a is attached to the pan head device of the first embodiment of the present invention.

When the lens device 3a is fixed to the imaging unit 2 while the engaging portion 10a provided in the lens device 3a is brought into contact with the abutting portion 9, the weight 8 is left in the figure as long as the abutting portion 9 is pushed by the engaging portion 10a. Go to, distance from the imaging unit center of gravity Gc ₁ horizontal axis H becomes L1.

The distance from the center of gravity Ga of the lens device 3a to the horizontal axis H is L2. The moment Ma about the horizontal axis H when the combined mass of the imaging unit 2 and the weight 8 is mc ₁ and the mass of the lens device 3a is ma is expressed by the following equation.

Ma ₁ = (mc ₁ × L1) − (ma × L2) (Equation 1)
In this case, so that the value of the moment Ma ₁ falls within a predetermined range, the optical axis of the position of the engaging portion 10a is set.

  FIG. 4 shows a configuration when the lens device 3b is attached to the pan head device of the first embodiment of the present invention.

When the lens device 3b is fixed to the image pickup unit 2 while the engaging portion 10b provided in the lens device 3b is brought into contact with the abutting portion 9, the weight 8 is left in the drawing as long as the abutting portion 9 is pushed by the engaging portion 10b. Go to, distance from the imaging unit center of gravity Gc ₁ horizontal axis H becomes L3.

The distance from the center of gravity Gb of the lens device 3b to the horizontal axis H is L4. A moment Mb ₁ about the horizontal axis H when the mass of the lens device 3b is mb is expressed by the following equation.

Mb ₁ = (mc ₁ × L3) − (mb × L4) (Equation 2)
In this case, so that the value of the moment Mb ₁ falls within a predetermined range, the optical axis of the position of the engaging portion 10b is set.

  Further, when another lens device is attached, similarly, the position of the engaging portion in the optical axis direction is set so that the moment value around the horizontal axis is within a predetermined range.

  Here, it goes without saying that the value of the moment about the horizontal axis is set so that the absolute value is smaller than the output torque of the drive unit that performs tilt drive.

  As described above, according to the first embodiment of the present invention, the weight moves to a position corresponding to the type of the lens device in the optical axis direction in conjunction with the mounting of the lens device. At the same time, the balance around the horizontal axis is appropriate.

  Here, the fixing of the position of the weight in the optical axis direction may be interlocked with the fixing of the lens device.

  In FIG. 5A, when the lens device is fixed by rotating the fixing ring 2a of the imaging unit 2 in the direction of the arrow X, the outer periphery of the fixing ring 2a and the outer periphery of the pressing member 11 are caused by gears or friction. Configure to mesh.

  When the pressing member 11 rotates in the direction of the arrow x in conjunction with the rotation of the fixing ring 2a, the state shown in FIG.

  In FIG. 5B, the pressing member 11 fixes the position of the weight 8 in the optical axis direction with the guide portion 8a sandwiched between the pressing surface 11a and the guide hole 2b.

  When removing the lens device, if the fixing ring 2a is rotated in the direction of the arrow Y, the pressing member 11 rotates in the direction of the arrow y, and the weight 8 can be slid in the optical axis direction.

  According to the configuration as described above, the position of the weight in the optical axis direction can be fixed in conjunction with the operation of fixing the lens device to the imaging unit, so that the work for replacing the lens device can be omitted, It is possible to securely fix the weight.

  Furthermore, the position of the weight in the optical axis direction may be fixed by urging the weight toward the lens device.

  In FIG. 6, a compression spring 12 is inserted between the imaging unit 2 and the abutment unit 9 of the guide unit 8 a of the weight 8.

  When the lens device 3a is fixed to the imaging unit 2 while the engaging portion 10a of the lens device 3a is brought into contact with the abutting portion 9, the compression spring 12 is compressed and urges the weight 8 toward the lens device 3a. .

  It is assumed that the urging force at this time is larger than the mass of the weight 8.

  According to the configuration as described above, since the position of the weight in the optical axis direction can be stabilized at the same time as fixing the lens device to the imaging unit, it is possible to omit the work for replacing the lens device. .

  Here, the member that generates the urging force is a compression spring, but the same effect can be obtained by using other means such as a tension spring or a magnet.

  Hereinafter, a pan head system according to a second embodiment of the present invention will be described with reference to FIGS.

  FIG. 7 shows the configuration of a pan / tilt head apparatus according to the second embodiment of the present invention.

  The imaging unit 2 provided integrally with the tilt operation unit that rotates about the horizontal axis H is provided with a fixing ring 2a for fixing the lens device and a guide hole 2b for passing the guide portion 8a of the weight 8. .

  Further, a centroid moving motor 13 is provided in the tilt operation portion, and a screw 14 substantially parallel to the guide hole 2b is provided at the tip of the centroid moving motor 13.

  The weight 8 is provided with a nut portion 8 b that is screwed with the screw 14, and the center-of-gravity moving motor 13 moves in the optical axis direction by rotating the screw 14.

  Further, the tilt operation unit is provided with a control means 15 and a communication means 16 connected to the control means 15.

  FIG. 8 shows a state in which the lens device 3 a is attached to the imaging unit 2.

  The lens device 3a is provided with an electric unit 17 for driving a moving lens group (not shown) in the lens device 3a. The electric unit 17 is provided with a storage means 18 and a communication means 19.

  When communication is performed between the communication means 16 and 19, the storage means 18 transmits the recognition data of the lens device 3a, the destination data of the weight 8, or the mass and gravity center data of the lens device 3a to the control means 15. To do.

  The control means 15 that has received the data from the storage means 18 drives the gravity center moving motor 13 to move the weight 8 in the optical axis direction.

L5 distance of the horizontal axis H from the imaging unit center of gravity Gc ₂ at this time, the synthetic mass of the imaging unit 2 and the weight 8 and mc _2, from the center of gravity Ga of the lens device 3a L6 distance of the horizontal axis H, of the lens device 3a The moment Ma ₂ about the horizontal axis H when the mass is ma is expressed by the following equation.

Ma ₂ = (mc ₂ × L5) − (ma × L6) (Equation 3)
The control means 15 drives the gravity center moving motor 13 so that the value of the moment Ma ₂ is within a predetermined range, and then stops the gravity center moving motor 13.

  FIG. 9 shows a state in which the lens device 3 b is attached to the imaging unit 2.

  When communication is performed between the communication means 16 and 19, the storage means 18 transmits the recognition data of the lens device 3b, the destination data of the weight 8, or the data of the mass and center of gravity of the lens device 3b to the control means 15. To do.

  The control means 15 that has received the data from the storage means 18 drives the gravity center moving motor 13 to move the weight 8 in the optical axis direction.

The distance from the imaging unit center of gravity Gc ₂ when the horizontal axis H L7, a synthetic weight of the imaging unit 2 and the weight 8 and mc _2, from the center of gravity Gb of the lens device 3b L8 distance of the horizontal axis H, of the lens device 3a The moment Mb ₂ about the horizontal axis H when the mass is mb is expressed by the following equation.

Mb ₂ = (mc ₂ × L7) − (mb × L8) (Equation 4)
The control means 15 drives the centroid movement motor 13 so that the value of the moment Mb ₂ is within a predetermined range, and then stops the centroid movement motor 13.

  Further, when another lens device is attached, similarly, the position of the weight in the optical axis direction is set by driving the gravity center moving motor so that the moment value around the horizontal axis is within a predetermined range.

  Here, it goes without saying that the value of the moment about the horizontal axis is set so that the absolute value is smaller than the output torque of the drive unit that performs tilt drive.

  As described above, according to the second embodiment of the present invention, when communication is performed between the pan head device and the lens device, the weight automatically moves to a position corresponding to the type of the lens device. The balance around you is appropriate.

  Here, the motor for driving the weight may be configured to also serve as a motor mounted on the pan head device or the lens device.

  In FIG. 10, an imaging unit 2 provided integrally with a tilt operation unit that rotates around a horizontal axis H has a fixing ring 2 a for fixing the lens device and a guide hole for passing the guide unit 8 a of the weight 8. 2b is provided.

  Furthermore, the imaging unit 2 is provided with a bearing 2c that rotatably supports a screw 14 that is substantially parallel to the guide hole 2b.

  The weight 8 is provided with a nut portion 8 b that is screwed with the screw 14, and a clutch portion 14 a is provided at the tip of the screw 14.

  Further, the tilt operation unit is provided with a control means 15 and a communication means 16 connected to the control means 15.

  The lens device 3a is provided with an electric unit 17 for driving a lens group (not shown) in the lens device 3a. The electric unit 17 is connected / disconnected to the storage unit 18, the communication unit 19, and the clutch unit 14a. A movable clutch 20 is provided.

  The other end of the movable clutch 20 is connected to a lens group drive motor (not shown).

  When changing the position of the weight 8 in the optical axis direction, the clutch portion 14a and the movable clutch 20 are connected, and a lens drive motor (not shown) is driven to rotate the screw 14 to move the weight 8 in the optical axis direction.

  After the weight 8 is moved to an appropriate position, the clutch portion 14a and the movable clutch 20 are disconnected.

  According to the configuration as described above, it is not necessary to provide a new motor for adjusting the center of gravity, and the weight can be moved by the existing motor, so that the manufacturing cost can be reduced and the product can be provided at low cost. Is possible.

  Here, when the mass of the moving lens group in the lens device is large, or when the movement amount is large and the position of the center of gravity of the lens device fluctuates, communication between the storage unit and the control unit is performed even during lens driving, The storage means may transmit the gravity center position data of the lens device at each lens position.

  When the lens is driven, the control means receives data from the storage means, drives the center of gravity moving motor, and performs control so that the moment value around the horizontal axis H is always within a predetermined range.

  According to the above configuration, it is possible to provide a pan head system that always has stable operation performance regardless of the type of lens device and the position of the moving lens group.

  Hereinafter, a pan head system according to a third embodiment of the present invention will be described with reference to FIGS.

  FIG. 11 and FIG. 12 show the configurations of a pan head apparatus and a lens apparatus according to the third embodiment of the present invention.

  When the mass ma of the lens device 3a is smaller than the mass mb of the lens device 3b, the additional mass 21 is attached to the lens device 3a.

11, the mass of the lens device 3a when fitted with additional mass 21 and ma ', the mass of the imaging section mc _3.

Further, the moment Ma ₃ around the horizontal axis H when the distance from the imaging unit gravity center Gc ₃ to the horizontal axis H is L9 and the distance from the additional mass 21 and the lens device 3a combined gravity center Ga ′ to the horizontal axis H is L10 is It is expressed by a formula.

Ma ₃ = (mc ₃ × L9) − (ma ′ × L10) (Equation 5)
Similarly, in FIG. 12, when the distance from the center of gravity Gb of the lens device 3b to the horizontal axis H is L11, the moment Mb around the horizontal axis H is expressed by the following equation.

Mb ₃ = (mc ₃ × L9) − (mb × L11) (Equation 6)
Here, the value of the moment Mb ₃ is configured to be within a predetermined range, the mass and the attachment position of the additional mass 21, the value of moment Ma ₃ is configured to be substantially equal to the moment Mb _3.

  As described above, according to the third embodiment of the present invention, the lens apparatus is configured such that the moment around the horizontal axis after the lens apparatus is attached to the pan head apparatus is a substantially constant value and within a predetermined range. Set the mass and position of the center of gravity.

  Thereby, even in a pan head system in which a plurality of types of lens devices are replaced and used, it is possible to always provide stable operation performance of the pan head device.

  In the third embodiment of the present invention, since the weight moving in the optical axis direction is not configured, the rotation radius of the pan head apparatus can be reduced.

  Here, the configuration of the lens device to which the additional mass is attached and the configuration of the lens device to which the additional mass is not attached have been taken as an example. It is done.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 1 Head apparatus 2 Imaging part 3a, 3b Lens apparatus 8 Weight 9 Abutting part 10a, 10b Engagement part

Claims (10)

  In order to change the shooting direction, at least two types of different lens devices are replaced with an imaging unit provided integrally with at least one of the pan operation around the vertical axis and the tilt operation around the horizontal axis. A pan head system to be used, wherein the operating portion of the pan head device is provided with a weight and an abutting portion provided integrally with the weight so as to be movable in an optical axis direction. When the lens unit is attached to the imaging unit, the abutment unit and the engagement unit come into contact with each other, and the weight is fixed in the optical axis direction at the same time as the lens device is attached to the pan head device. The pan head system is characterized in that the moment value around the rotation axis of the operating part is within a predetermined range.   2. The pan head system according to claim 1, wherein the weight and the abutting unit are fixed at positions in the optical axis direction at the same time as the lens device is fixed to the imaging unit.   2. The abutting portion is urged toward the engaging portion by an urging means, and the urging force of the urging means is greater than at least the mass of the weight and the abutting portion. 2. The pan head system according to 2.   In order to change the shooting direction, at least two types of different lens devices are replaced with an imaging unit provided integrally with at least one of the pan operation around the vertical axis and the tilt operation around the horizontal axis. In the pan head system to be used, the operating unit of the pan head device is provided with a communication means for communicating with the lens device, a weight, and a slide means for moving the weight in the optical axis direction. Further, the pan head device is provided with control means for controlling the position of the weight in the optical axis direction, the lens device is provided with storage means, and the head device or the lens device has the weight. Drive means for moving the lens device along the slide means, and the control means reads the information of the lens device from the storage means by the communication means, and rotates the rotating shaft of the operating portion. Camera platform system the value of the moment is characterized by such, to move the position of the optical axis direction of the weight by controlling the drive means falls within a predetermined range.   5. The pan / tilt head according to claim 4, wherein the information includes at least one of recognition data of the lens device, destination data of the weight, or data of mass and center of gravity of the lens device. system.   The drive means is any one of a wiper motor provided in the pan head device, or a zoom motor, a focus motor, an iris motor, an extender drive motor, and an electric macro motor provided in the lens device. The pan head system according to claim 4, wherein:   The storage means stores at least two gravity center positions when the focal length or focus value of the lens apparatus is different, and the control means stores the storage means when the focal distance or focus value of the lens apparatus changes. The position of the weight in the optical axis direction is controlled by controlling the driving means so that the position of the center of gravity around the rotation axis of the operating unit falls within a predetermined range. 7. The pan head system according to claim 4, wherein the pan head system is characterized in that:   In order to change the shooting direction, at least two types of different lens devices are replaced with an imaging unit provided integrally with at least one of the pan operation around the vertical axis and the tilt operation around the horizontal axis. A pan head system to be used, wherein the lens device used in the pan head system has a moment value around a rotation axis of the operating unit when the lens device is attached to the pan head device. A pan head system characterized by being configured to be inside.   A pan head device comprising the pan head system according to claim 1.   A lens apparatus comprising the pan head system according to claim 1.

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