JP2014013346A - Rotating/swinging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating/swinging device that has a configuration advantageous to reduce its size.SOLUTION: A rotating/swinging device comprises: a driven gear 25 normally/reversely rotated by the normal/reverse rotation of a single motor 21; and a swing unit 27 swung in the direction of rotation of the driven gear 25 by frictional contact with the driven gear 25, and holding a first gear 28 and a second gear 29, which are engaged with the driven gear 25. A camera unit 11 is rotated by engaging the first gear 28 with a rotation input gear 12A through swinging the swing unit 27 to one direction. Also, the camera unit 11 is swung by engaging the second gear 29 with a swing input gear 52A through swinging the swing unit 27 to the other side.

Description

  The present invention relates to a rotation / oscillation device that rotates and swings a unit such as a camera unit.

Conventionally, there has been a device for rotating (for example, horizontal rotation) and swinging (for example, vertical rotation) to move the camera viewpoint in almost all directions, and each of the rotation and swing has a driving force. Therefore, two motors serving as driving sources were provided (see, for example, Patent Document 1).
Further, conventionally, the switching arm is swung using the rotation of one motor in the same direction, so that the gear of the film winding mechanism is engaged with the gear of the rewinding mechanism, and the camera that winds and rewinds the film is used. A torque detection device has also been proposed (see, for example, Patent Document 2).

JP 2004-212465 A JP-A-1-245233

However, since the conventional rotating / swinging device requires two motors, the driving parts are large, which is disadvantageous for downsizing and cost reduction.
In addition, an apparatus that winds and rewinds a film with a single motor is complicated in configuration and increases the number of parts. Further, it is not possible to independently rotate and swing a unit such as a camera by applying this apparatus configuration.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a rotation / oscillation device having a configuration advantageous for downsizing.

In order to achieve the above object, the present invention provides a rotation / oscillation device comprising a rotation mechanism for rotating a predetermined unit and a swing mechanism for swinging the unit. The first gear and the second gear which are swung to one side / the other side according to the rotation direction of the driven gear and are engaged with the driven gear by frictional contact with the driven gear which rotates forward / reversely by the reverse rotation and the driven gear. A pivoting member that holds two gears, and the pivoting mechanism includes a pivoting input gear that meshes with the first gear when the pivoting member pivots to one side or the other side. The unit is rotated by the rotation of the input gear, and the swing mechanism has a swing input gear that meshes with the second gear when the swing member swings to the other side or one side. The unit is swung by the rotation of the input gear. Rolling - characterized in that it is a rocking conversion mechanism.
According to this configuration, the rotation and swing of the unit can be switched by forward / reverse rotation of a single motor, and the number of parts is reduced compared to the one of two motors, which is advantageous for downsizing. can do.

The said structure WHEREIN: You may make it the said rocking | swiveling member insert in the said driven gear so that rocking | fluctuation is possible. In this case, the oscillating member has an insertion shaft that is inserted into a through hole that penetrates the shaft center of the driven gear, and the insertion shaft frictionally contacts the driven gear according to the rotation direction of the driven gear. The swing member may be swung.
Further, in the above configuration, the first gear and the second gear are arranged at an interval in the circumferential direction of the driven gear, and the rotation input is between the first gear and the second gear. The gear and the swing input gear may be arranged on the same axis.

  Further, in the above configuration, the unit main body is swingably supported by a rotating table via a gimbal mechanism, the rotating input gear is provided on the rotating table, and a drive transmission shaft to the gimbal mechanism is rotated by the rotation. You may make it penetrate the dynamic input gear and the said rocking | fluctuation input gear is arrange | positioned at the edge part. In this case, an engaged portion is provided on the outer periphery of the turntable, and when the swinging member swings to the swinging side of the unit, the swinging member is engaged with the engaged portion. And you may make it have a rotation control member which controls rotation of the said turntable.

  According to the present invention, the driven gear that rotates forward / reversely by forward / reverse rotation of a single motor and the frictional contact with the driven gear swings to one side / the other side according to the rotational direction of the driven gear. And a swing member that holds a first gear and a second gear that mesh with the driven gear, and the rotating mechanism is configured to move the first gear when the swing member swings to one side or the other side. A rotation input gear that meshes with one gear, and the unit is rotated by the rotation of the input gear, and the swing mechanism is configured so that when the swing member swings to the other side or one side, Since the rotation gear has a swing input gear that meshes with the second gear and the unit main body swings by the rotation of the input gear, the structure can be advantageously reduced in size. .

It is a perspective view of the camera drive unit which concerns on 1st embodiment of the rotation and rocking | fluctuation apparatus of this invention. It is the perspective view of the camera drive unit seen from the direction different from FIG. It is a disassembled perspective view of a camera drive unit. It is the perspective view which looked at the camera drive unit from the bottom side. It is a figure where it uses for description of rotation. It is a figure with which it uses for description of rocking | fluctuation. It is VII-VII sectional drawing of FIG. It is a figure which shows a rocking | swiveling unit when a driven gear carries out normal rotation with a periphery structure. It is a figure which shows a rocking | swiveling unit when a driven gear reversely rotates with a periphery structure. It is a figure which shows the turntable of the camera drive unit which concerns on 2nd embodiment with a periphery structure. It is a figure which shows the state which the 2nd gear meshed | engaged with the rocking | fluctuation input gear. It is a figure which shows the state which the 1st gear meshed | engaged with the rotation input gear.

Embodiments of the present invention will be described below with reference to the drawings.
<First embodiment>
FIG. 1 is a perspective view of a camera drive unit 10 according to a first embodiment of the rotation / swing device of the present invention, and FIG. 2 is a perspective view of the camera drive unit 10 viewed from a direction different from FIG. It is. FIG. 3 is an exploded perspective view of the camera drive unit 10. 2 shows a state in which the unit cover 20 (see FIGS. 1 and 3) covering the camera unit 11 is removed.
The camera drive unit 10 is a camera drive unit for a vehicle that is mounted on a vehicle such as an automobile. By rotating and swinging the mounted camera unit 11, the degree of freedom of a shooting range around the vehicle is remarkably increased. It has been improved.
Note that the directions such as up, down, left, and right described below are directions when the camera unit 11 is in the upper position, and do not necessarily coincide with directions when the vehicle is mounted. The orientation in which the camera drive unit 10 is attached to the vehicle is arbitrarily set according to the application and installation conditions.

  The camera drive unit 10 is roughly divided into a frame 23 that supports a single motor 21, a driven gear 25 that rotates forward / reversely by forward / reverse rotation of the motor 21, and a frictional force between the driven gear 25. The swing unit 27 is a friction mechanism that swings along the rotation direction of the driven gear 25, and the camera unit 11 is rotated (for example, horizontally rotated) according to the swing direction of the swing unit 27. The moving mechanism 31 and the swing mechanism 41 that swings the camera unit 11 (for example, up and down rotation) are provided.

  The frame 23 is formed in a plate shape bent in a substantially U-shape, and has a pair of side wall portions 23A serving as left and right walls of the unit 10 and a bottom plate portion 23B serving as a unit bottom portion. A single motor 21 having a worm gear 21A is attached to the bottom plate portion 23B. More specifically, the bottom plate portion 23B is integrally provided with a standing shaft 23C (see FIG. 3) that stands vertically with respect to the bottom plate portion 23B, and the motor is disposed sideways with respect to the standing shaft 23C. 21 is fixed.

A driven gear 25 and a swing unit 27 that are meshed with the worm gear 21A are sequentially inserted into the standing shaft 23C. The driven gear 25 integrally includes a helical gear (also referred to as a helical gear) 25A that meshes with the worm gear 21A and a gear (spar gear (spur gear)) 25B having a diameter larger than that of the helical gear 25A. A through hole 25C having a diameter larger than the standing shaft 23C of the frame 23 is provided through the shaft centers of 25A and 25B, and the standing shaft 23C is inserted into the through hole 25C.
The swing unit 27 includes a U-shaped gear holder 27A that rotatably holds a first gear (spar gear (spur gear)) 28 and a second gear (spar gear (spur gear)) 29, and a gear holder 27A. A single shaft portion 27B extending vertically downward is integrally provided. The single shaft portion 27B has substantially the same diameter as the through hole 25C of the driven gear 25, and is frictionally fitted by being inserted into the through hole 25C. The shaft portion 27B is formed in a cylindrical shape through which the standing shaft 23C of the frame 23 passes.

  For this reason, by inserting the shaft portion 27B of the swing unit 27 into the standing shaft 23C of the frame 23 (see FIG. 3), the swing unit 27 can turn freely with respect to the standing shaft 23C. It is attached to. Further, since the shaft portion 27B of the swing unit 27 passes through the through hole 25C of the driven gear 25, the driven gear 25 is coaxial with the swing unit 27 and is relatively rotatable. In this case, since the shaft portion 27B of the swing unit 27 is frictionally fitted into the through hole 25C of the driven gear 25, when the driven gear 25 rotates, the frictional force between the inner peripheral surface of the driven gear 25 and the driven gear 25 rotates. Thus, the swing unit 27 rotates in the same direction as the rotational direction of the driven gear 25, that is, the gear holder 27 </ b> A swings with respect to the axis of the driven gear 25.

FIG. 4 is a perspective view of the camera drive unit 10 as seen from the bottom side. In FIG. 4, the frame 23 and the like are omitted for easy understanding.
As shown in FIGS. 3 and 4, the first gear 28 and the second gear 29 held by the gear holder 27 </ b> A are arranged at intervals in the circumferential direction of the driven gear 25, and both are driven gear 25. Engage with.
For this reason, when the driven gear 25 is rotationally driven by the motor 21, the first gear 28 and the second gear 29 are moved in the same direction as the rotational direction of the driven gear 25 by the swing unit 27, and the driven gear 25 The first gear 28 and the second gear 28 are rotationally driven by the rotation.
Here, the first gear 28 is formed by a pair of upper and lower gears 28A and 28B that rotate integrally with the gear holder 27A interposed therebetween, and the second gear 29 is only one side (lower side) of the gear holder 27A. Is provided.

Between the first gear 28 and the second gear 29, a rotation input gear (spar gear (spur gear)) 12A provided integrally with the turntable 12 that supports the camera unit 11 is disposed. A swing input gear (spar gear (spur gear)) 52A provided integrally with the lower end of the drive transmission shaft 52 that penetrates (including the rotation input gear 12A) is disposed.
The turntable 12 is a substantially cylindrical shape that rotatably supports a disc-shaped base 12B having a rotation input gear 12A integrally formed on the lower surface and left and right arm portions 11A of the camera unit 11 above the base 12B. The unit support wall 12C is integrally formed, and is disposed on the frame 23 so as to be rotatable about the central axis of the base 12B (= the central axis of the turntable 12). For this reason, as shown in FIG. 5, when the rotation input gear 12 </ b> A rotates (the direction of rotation is indicated by an arrow in FIG. 5), the camera unit 11 rotates integrally with the turntable 12. Thus, a rotation mechanism 31 that rotates the camera unit 11 by the rotation of the rotation input gear 12A is formed.

As shown in FIG. 3, the upper end of the drive transmission shaft 52 that penetrates the turntable 12 is integrally provided with a cup-shaped portion (hereinafter referred to as a cup portion) 52B whose diameter increases upward. The camera unit 11 is connected to the cup portion 52B via a Y-shaped arm portion 53.
Here, as shown in FIG. 1 and the like, since the left and right arm portions 11A of the camera unit 11 are rotatably supported by the unit support wall 12C of the turntable 12, the axis passing through the left and right arm portions 11A is the center. When the camera unit 11 rotates, the camera unit 11 swings.

The Y-shaped arm portion 53 is rotatably connected to the camera unit 11 via a pair of shaft portions 11B (see FIG. 3) orthogonal to the left and right arm portions 11A of the unit 11. For this reason, when the cup 52B is rotated relative to the turntable 12, the camera unit 11 swings according to the amount of rotation as shown in FIG. As a result, a gimbal mechanism for swinging the camera unit 11 about the axis passing through the left and right arm portions 11A is formed, and the swing input gear 52A at the lower end of the drive transmission shaft 52 connected to the cup portion 52B. A swinging mechanism 41 for operating the gimbal mechanism is formed by the rotation.
Since the swing mechanism 41 converts the rotation of the swing input gear 52A into the swing of the camera unit 11, more specifically, it is a rotation-swing conversion mechanism.

Next, the layout of each gear will be described in detail.
7 is a cross-sectional view taken along the line VII-VII in FIG. 4, that is, a side cross-sectional view passing through the axes of the first gear 28, the drive transmission shaft 52, and the second gear 29. In the figure, the symbol L1 also coincides with the axis of the drive transmission shaft 2A. In addition, the axes of the first gear 28, the drive transmission shaft 52, and the second gear 29 are parallel, and the direction orthogonal to each axis (the left-right direction in FIG. 7) is the swing direction of the swing unit 27. Yes.
As shown in this figure, the rotation input gear 12A and the swing input gear 52A are coaxially arranged with an interval in the vertical direction along the axis L1 of the drive transmission shaft 52, and the rotation input gear 12A is The swing input gear 52A is disposed between the lower gear 28A of the first gear 28 and the second gear 29, and is disposed on the side of the upper gear 28B of the first gear 28.

  With this configuration, when the swing unit 27 swings leftward in FIG. 7, the upper gear 28B of the first gear 28 meshes with the rotation input gear 12A, as shown in FIG. The two gears 29 are separated from the swing input gear 52A. On the other hand, when the swing unit 27 swings in the right direction in FIG. 7, the second gear 29 is engaged with the swing input gear 52A, and the first gear 28 is separated from the rotation input gear 12A. As a result, the gears 28 and 29 of the swing unit 27 are selectively meshed with either the rotation input gear 12A or the swing input gear 52A.

The first gear 28 and the second gear 29 will be described in detail. The same gear parts are applied to the lower gear 28A and the second gear 29 of the first gear 28, and there is an interval in the circumferential direction of the driven gear 25. The gears 28 and 29 are meshed with the driven gear 25.
The upper gear 28B of the first gear 28 has the same diameter as that of the lower gear 28A, and is integrally connected to the lower gear 28A via a common shaft 28C (see FIG. 7). Located at the same height. As shown in FIG. 7, the rotation input gear 12A is formed to have a larger diameter than the swing input gear 52A. For this reason, the first gear 28 meshes only with the rotation input gear 12A without meshing with the swing input gear 52A.

On the other hand, since the second gear 29 is disposed on the side of the swing input gear 52A and below the rotation input gear 12A, the second gear 29 does not mesh with the rotation input gear 12A, and only the swing input gear 52A. To mesh.
In the present embodiment, as shown in FIG. 7, the camera unit 11, the rotation input gear 12A, the swing input gear 52A, and the driven gear 25 are vertically arranged at intervals from above and left and right of these gears. The first gear 28 and the second gear 29 are arranged using a space that is open. For this reason, these gear groups can be arranged close to each other in a compact manner, and the gear mechanism can be reduced in size.

Next, the operation of the camera drive unit 10 will be described.
In this configuration, as described above, the shaft portion 27B of the swing unit 27 is frictionally fitted in the through hole 25C of the driven gear 25, so that the driven gear 25 is rotated forward / reversely by the forward / reverse rotation of the motor 21. In the case of reverse rotation, the oscillating unit 27 rotates in the same direction as the rotational direction of the driven gear 25 due to the frictional force with the driven gear 25, and the gear holder 27A is based on the axis of the driven gear 25. Swings in the direction of rotation.
Here, FIG. 8 is a diagram showing the swing unit 27 together with the peripheral configuration when the driven gear 25 rotates in the normal direction (in this embodiment, rotates in the clockwise direction indicated by the arrow in FIG. 8) by the normal rotation of the motor 21. It is. FIG. 9 is a diagram illustrating a case where the driven gear 25 rotates in the reverse direction (rotates counterclockwise as indicated by the arrow in FIG. 9) due to the reverse rotation of the motor 21. Further, in the drawing, a symbol L2 is an axis of the driven gear 25.

When the motor 21 rotates forward and the driven gear 25 rotates (forward rotation), the first gear 28 moves to the axis L1 as shown in FIG. 8 and FIG. Approaching and meshing with the rotation input gear 12A. In this case, since the second gear 29 is separated from the axis L1, it does not mesh with the swing input gear 52A.
Thereby, the rotational force of the motor 21 is transmitted to the rotation input gear 12A via the driven gear 25 and the first gear 28, and the camera unit 11 is rotated by the rotation of the rotation input gear 12A.
On the other hand, when the motor 21 rotates in the reverse direction and the driven gear 25 rotates (reverses), the second gear 29 moves closer to the axis L1 as shown in FIG. 9 due to the rotation of the gear holder 27A in the rotation direction. It meshes with the input gear 52A. Thereby, the rotational force of the motor 21 is transmitted to the swing input gear 52A via the driven gear 25 and the second gear 29, and the camera unit 11 swings by the rotation of the swing input gear 52A.
In this way, the rotation / swing of the camera unit 11 can be automatically switched by switching between normal rotation / reverse rotation of the motor 21.

As described above, according to the present embodiment, the driven gear 25 rotates in the rotational direction due to frictional contact between the driven gear 25 and the driven gear 25 that rotates forward / reversely by the normal rotation / reverse rotation of the single motor 21. A swing unit (swing member) 27 that swings and holds the first gear 28 and the second gear 29 that mesh with the driven gear 25 is provided. 28 is engaged with the rotation input gear 12 </ b> A to rotate the camera unit 11, and the second gear 29 is engaged with the swinging input gear 52 </ b> A by swinging the swinging unit 27 to the other side. The camera unit 11 can be switched between rotating and swinging with a single motor 21. In this case, since only one motor 21 is required, the number of parts can be reduced as compared with the conventional two-motor configuration, and the camera drive unit 10 that is advantageous for downsizing can be realized.
Conventionally, there are cameras that can see a wide area without moving the viewpoint with a fisheye lens or the like, but in the case of a fisheye lens, the edge of the image is distorted. On the other hand, in this configuration, it is possible to realize a camera that can clearly capture a wide range without distortion with an inexpensive configuration of one motor.

In this configuration, the rotation of the rotation input gear 12A rotates the camera unit 11, and the rotation of the swing input gear 52A swings the camera unit 11. Therefore, the rotation and swing mechanism is transmitted. It can be configured with a highly efficient gear mechanism, and the complexity of the mechanism can also be suppressed.
Further, in this configuration, since the swing unit 27 is inserted into the driven gear 25 so as to be swingable, the assembly of the driven gear 25 and the swing unit 27 is easy. In addition, the oscillating unit 27 has a shaft portion (insertion shaft) 27B that is inserted into a through hole 25C penetrating the shaft center of the driven gear 25, and this shaft portion 27B comes into frictional contact with the driven gear 25 to cause the driven gear. Since the oscillating unit 27 is oscillated according to the rotation direction of the driven gear 25, the friction mechanism that oscillates the oscillating unit 27 according to the rotation of the driven gear 25 can be configured simply and with a small number of parts. This is an advantageous configuration.

Further, the first gear 28 and the second gear 29 are arranged at an interval in the circumferential direction of the driven gear 25, and swing between the first gear 28 and the second gear 29 and the rotation input gear 12 </ b> A. Since the input gear 52A is coaxially arranged, the input gears 28 and 29 for turning and swinging can be arranged by efficiently using the space between the first gear 28 and the second gear 29. Thereby, these gears 28, 29, 12A, and 52A can be arranged close to each other, and can be efficiently downsized.
The camera unit 11 is swingably supported by the turntable 12 via a gimbal mechanism including a Y-shaped arm portion 53 and the like, and a turn input gear 12A is provided on the turntable 12 to Since the drive transmission shaft 52 penetrates the rotation input gear 12A and the swing input gear 52A is disposed at the end thereof, the rotation mechanism 31 and the swing mechanism 41 of the camera unit 11 can be formed simply and compactly. Can do. As a result, the size can be further reduced, and the number of parts can be reduced.
As described above, since the size can be reduced and the number of parts can be reduced, it is possible to realize the camera drive unit 10 that is advantageous for cost reduction.

<Second embodiment>
10 to 12 show the turntable 12 of the camera drive unit 10 according to the second embodiment together with the peripheral configuration. In the second embodiment, as shown in FIG. 10, a locking groove (engaged portion) 71 is provided on the outer peripheral portion of the turntable 12, and the swing unit 27 is set according to the swing position of the swing unit 27. A locking member (rotation restricting member) 73 that engages with the locking groove 71 is provided, and the other configuration is substantially the same as in the first embodiment.
The locking groove 71 is formed in a concave groove provided on the entire outer periphery of the base 12 </ b> B of the turntable 12, and the locking member 73 is formed in a pin shape standing from the gear holder 27 </ b> A of the swing unit 27. . When the second gear 29 meshes with the swing input gear 52A by the swing of the swing unit 27, the lock member 73 engages with the lock groove 71 as shown in FIG. Is engaged with the rotation input gear 12A, as shown in FIG.

For this reason, when the motor 21 rotates forward and the first gear 28 meshes with the rotation input gear 12A, the rotation of the turntable 12 is not hindered. The camera unit 11 can be rotated by the rotation of the gear 12A.
On the other hand, when the motor 21 rotates in the reverse direction and the second gear 29 meshes with the swing input gear 52A, the lock member 73 engages with the lock groove 71, so that the rotation of the turntable 12 is restricted. For this reason, when the camera unit 11 is rocking | swiveling, the situation where the turntable 12 rotates can be prevented reliably.
Thus, in this embodiment, when the swing unit 27 swings to the side on which the camera unit 11 is swung, it engages with the locking groove (engaged portion) 71 and rotates the turntable 12. Since the lock member (rotation restricting member) 73 for restricting the movement is provided, in addition to the various effects of the first embodiment, it is possible to reliably prevent the camera unit 11 from rotating when the camera unit 11 swings. It becomes possible to do.

  The above-described embodiment is merely one aspect of the present invention, and can be arbitrarily modified within the scope of the present invention. For example, in the above-described embodiment, a known rotation mechanism or swing mechanism (rotation-swing conversion mechanism) may be applied to the rotation mechanism 31 and the swing mechanism 41. Furthermore, in the above-described embodiment, the case where the present invention is applied to the camera drive unit 10 that rotates and swings the camera unit 11 has been described. good. That is, the present invention may be widely applied to a rotation / oscillation device that rotates and swings various known units.

10 Camera drive unit (turning / swinging device)
DESCRIPTION OF SYMBOLS 11 Camera unit 12 Turntable 12A Rotation input gear 21 Motor 25 Driven gear 25C Through-hole 27 Oscillation unit (oscillation member, friction mechanism)
27B Shaft (insertion shaft)
28 First gear 29 Second gear 31 Rotating mechanism 41 Oscillating mechanism (rotation-oscillating conversion mechanism)
52 Drive transmission shaft 52A Oscillating input gear 71 Locking groove (engaged portion)
73 Locking member (rotation restricting member)

Claims (6)

In a rotation / oscillation device comprising a rotation mechanism for rotating a predetermined unit and a swing mechanism for swinging the unit,
A driven gear that rotates forward / reverse by forward / reverse rotation of a single motor;
A rocking member holding a first gear and a second gear meshing with the driven gear while swinging to one side / the other side according to the rotation direction of the driven gear by frictional contact with the driven gear;
The rotation mechanism has a rotation input gear that meshes with the first gear when the swing member swings to one side or the other side, and rotates the unit by rotating the input gear. ,
The swing mechanism has a swing input gear that meshes with the second gear when the swing member swings to the other side or one side, and the unit is swung by the rotation of the input gear. Rotation / oscillation device characterized by being a rotation-oscillation conversion mechanism   The rotation / oscillation device according to claim 1, wherein the oscillation member is inserted into the driven gear so as to freely swing.   The swing member has an insertion shaft that is inserted into a through-hole that penetrates the shaft center of the driven gear, and the insertion shaft is brought into frictional contact with the driven gear, and the swinging member is rotated according to the rotation direction of the driven gear. The rotating / swinging device according to claim 2, wherein the moving member is oscillated.   The first gear and the second gear are arranged at an interval in the circumferential direction of the driven gear, and the rotation input gear and the swing input are between the first gear and the second gear. The rotation / oscillation device according to any one of claims 1 to 3, wherein the gear and the gear are arranged coaxially.   The unit main body is swingably supported by a turntable via a gimbal mechanism, and the turn input gear is provided on the turntable, and a drive transmission shaft to the gimbal mechanism passes through the turn input gear. 5. The rotation / oscillation device according to claim 4, wherein the oscillation input gear is disposed at an end thereof.   An engaged portion is provided on an outer peripheral portion of the turntable, and when the swinging member swings to the swinging side of the unit, the swinging member is engaged with the engaged portion and the 6. The turning / swinging device according to claim 5, further comprising a turning restriction member for restricting turning of the turntable.

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