JP2006329215A - Drive unit and camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive unit capable of securing durability of a harness and securing quality of signals transmitted by the harness so that the length of the harness is shortened. <P>SOLUTION: In a camera system 10 having an imaging section 12, a movable section 11 supporting the imaging section 12, and a base section 13 rotatably supporting the imaging section 12 and movable section 11, a conducting wire for connecting the imaging section 12 and base section 13 is inserted into a hollow section where a rotary shaft section 313 of the base section 13 is hollow. The conducting wire is fixed on both ends of the rotary shaft section 313 so as not to generate distortion caused by its rotation. Thus, the length of the conducting wire can be shortened in this structure, unnecessary radiation or the like caused by such length of the conducting wire can be reduced, and durability of the conducting wire can be maintained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drive device, and more particularly to a drive device that rotates a camera device.

  The pan / tilt mechanism-integrated video camera has, for example, a harness that connects a movable portion that supports the imaging portion and a base portion. At this time, in order to realize a high-quality video, an example in which a video signal is transmitted as a digital signal instead of an analog signal is increasing. At this time, if digital signals are transmitted in parallel, a large number of signals are required, and it is difficult to route the harness. In order to solve such a problem, a method of serially transmitting a digital signal using an LVDS transmitter / receiver IC has been adopted.

  Here, the signals transmitted by the LVDS transmitter / receiver IC are originally transmitted in a differential format with an impedance of 100 ohms. Conventionally, however, all signals are transmitted by FFC (flexible flat cable; “FFC”). For this reason, in consideration of the bending durability of the harness, the FFCs are arranged in a spiral shape in the portion of the rotating shaft of the movable part.

  However, such a configuration inevitably increases the overall length of the harness. For this reason, when the total length of the FFC harness for imaging data is increased, the signal waveform is disturbed due to impedance mismatching, which causes deterioration of unnecessary radiation. In addition, since the FDC for video data and other signal harnesses overlap each other, a long distance is routed, so that interference between signals, for example, noise in the image may occur.

JP 2003-90490 A

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is a new and improved device capable of ensuring the durability of the harness and shortening the harness length. It is to provide a driving device.

  In order to solve the above-described problems, according to an aspect of the present invention, a drive device including a movable portion and a base portion that rotatably supports the movable portion is provided. In such a drive device, the rotating shaft portion of the base portion is hollow, and a conducting wire is inserted through the rotating shaft portion. The conducting wire inserted through the rotating shaft is fixed at both ends of the rotating shaft.

  With this configuration, it is possible to reduce the length of the conducting wire. Furthermore, by fixing both ends of the conducting wire inserted through the hollow rotating shaft portion, twisting does not occur due to the rotation of the movable portion, and the durability of the conducting wire can be maintained.

  Here, for example, a flat cable can be used as the conducting wire. At this time, the flat cable is arranged in a spiral shape on a plane perpendicular to the rotation shaft portion, centering on the rotation shaft portion of the base portion, in the movable portion. With this configuration, the size of the spiral changes due to the rotation of the driving device, and the load on the flat cable is suppressed. Further, one end of the spirally arranged flat cable is bent in the direction of the rotating shaft and is inserted into the rotating shaft.

  According to another aspect of the present invention, there is provided a camera device including an imaging unit that images a subject, a movable unit that supports the imaging unit, and a base unit that rotatably supports the imaging unit and the movable unit. Is done. In such a camera device, the rotating shaft portion of the base portion is hollow, and a conducting wire connecting the imaging unit and the base portion is inserted through the rotating shaft portion. The conducting wire inserted through the rotating shaft portion is fixed at both ends of the rotating shaft portion in order to prevent twisting of the conducting wire.

  Here, for example, a flat cable can be used as the conducting wire. At this time, the flat cable is spirally disposed on the movable portion on the plane perpendicular to the rotation shaft portion with the rotation shaft portion of the base portion as the center. One end of the spirally arranged flat cable is bent and inserted through the rotating shaft.

  Moreover, at least any one of a coaxial wire or a twisted pair wire can also be included as a conducting wire. A coaxial line, a twisted pair line, or the like is suitable for use for signals that require high signal quality because impedance management can be easily performed. This makes it possible to select a conducting wire to be used depending on the characteristics of the transmitted signal.

  Further, the rotating shaft portion may include a separating member that separates the inside of the rotating shaft portion. In each space formed by such a separating member, for example, when the conducting wire is a flat cable and a coaxial line, the respective cables are inserted into the separated spaces. Thereby, a flat cable and a coaxial line can be isolate | separated and it can prevent that conducting wires contact and wear.

  Further, if a conducting wire is inserted into the rotating shaft portion, the conducting wire comes into contact with the inner wall surface of the rotating shaft portion when the movable portion rotates. At this time, for example, if the rotating shaft portion is made of metal, there is a problem that the conducting wire is worn and short-circuited. Therefore, for example, a plastic substantially cylindrical cable guide can be inserted into the rotating shaft portion, and a lead wire can be inserted into the cable guide. In addition, the cable guide may be provided with the above separating member to separate the inside of the cable guide. Thereby, it can prevent that conducting wires contact and wear.

  Furthermore, the separating member that separates the conductive wires can be formed from, for example, two plate-like members. In such a camera device, both ends of the flat cable inserted into the rotating shaft portion are fixed so as not to cause twist due to rotation. However, the flat cable is formed by forming the separating member from two plate-like members. Can be sandwiched and fixed by two plate-like members. Further, the flat cable is bent so that the extending direction of the spiral cable portion and the extending direction in the rotary shaft portion differ by about 90 °. At this time, for example, an oblique notch is formed in at least one of the separating members in the width direction of the separating member, and the flat cable is bent along the shape of the notch. With this configuration, it is possible to reduce a load caused by bending of the flat cable, which occurs when the extending direction of the flat cable arranged in a spiral shape is changed.

  On the other hand, in order to define the movable range of the flat cable arranged in a spiral shape, a harness guide surrounding the flat cable may be provided. Such a harness guide can be formed from, for example, plastic, thereby preventing the flat cable from coming into contact with the metal member, and suppressing the flat cable from being worn or short-circuited.

  Moreover, although the movable part and base part which support an imaging part are integrated, the said camera apparatus can be comprised so that a movable part and a base part are separable.

  As described above, according to the present invention, it is possible to provide a drive device that can ensure the durability of the harness and shorten the harness length.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
First, the main configuration of the camera apparatus 10 according to the first embodiment of the present invention will be described. Here, FIG. 1 is a block diagram showing a configuration of the camera apparatus 10 according to the present embodiment.

  As shown in FIG. 1, the camera device 10 according to the present embodiment is a small video camera capable of capturing a moving image in color, for example, and is installed in a place where a subject to be imaged can be captured. . Such a camera device 10 is used, for example, as a monitoring camera for security in a building or the like, or a monitoring camera in a wedding hall, conference hall, hall, school, or the like.

  The camera device 10 is configured as, for example, an integrated 3CCD camera equipped with a pan / tilt drive mechanism. That is, as shown in FIG. 1, the camera device 10 rotates the imaging unit 12 that images a subject and generates a video signal, the camera control unit 14 that controls each unit in the camera device 10, and the imaging unit 12. And a connector unit 18 for inputting a video signal, a camera operation control signal, a synchronization signal, and the like between the camera device 10 and the outside.

  The imaging unit 12 includes, for example, a lens, a three-plate CCD that photoelectrically converts an optical image incident from the lens to generate an imaging signal, a video signal circuit that processes a video signal, a control circuit, and a lens operation ( Zoom, focus, iris, and the like). The imaging unit 12 images a subject and outputs a high-quality, high-resolution digital video signal.

  The driving device 16 includes a tilt driving device 20 that rotates the imaging unit 12 in the tilt direction, and a pan driving device 30 that rotates the imaging unit 12 in the pan direction. The driving device 16 can change the imaging direction by rotating the imaging unit 12 in the pan / tilt direction. The tilt driving device 20 and the pan driving device 30 include, for example, a stepping motor as a driving source.

  In the camera device 10 having such a configuration, for example, power is supplied from an external AC adapter (not shown) to a power supply terminal provided in the connector unit 18, and when the power of the camera device 10 is turned on, the drive device 16 is turned on, adjusted to a preset imaging direction, and stopped.

  Further, a video signal can be output by connecting a cable to the video output terminal in the connector portion 18 of the camera device 10. For example, a terminal for inputting / outputting a camera operation control signal or the like can be provided in the connector portion 17 and connected to an external operating device (not shown). Thus, the camera device 10 can be operated.

  Next, an external configuration of the camera device 10 according to the present embodiment will be described with reference to FIG. Here, FIG. 2 shows the external appearance of the camera apparatus 10 according to the present embodiment, where (a) is a front view and (b) is a side view.

  As shown in FIG. 2, the camera device 10 is schematically configured to include, for example, an imaging unit 12, an imaging unit support unit 11, and a base unit 13.

  The imaging unit 12 is provided with a lens 121 on the front side, and images a subject in a direction in which the lens 121 faces to generate a video signal.

  The imaging support unit 11 is, for example, a hollow support (shell) provided so as to cover both side surfaces and the back surface of the imaging unit 12. The imaging unit support unit 11 is connected to the imaging unit 12 by, for example, tilt rotation shafts provided on both side surfaces of the imaging unit 12, and the imaging unit 12 is tilted (elevation direction; horizontal in FIG. 2). The direction of rotation with respect to the direction axis). A tilt drive device 20 is disposed inside the imaging unit support unit 11.

  The base unit 13 is, for example, a hollow base (shell) located at the lowermost part of the camera device 10. The base unit 13 supports the imaging unit support unit 11 and the imaging unit 12 so as to be rotatable in a pan direction (azimuth direction; a direction rotating with respect to a vertical axis in FIG. 2) by a pan rotation shaft or the like. A pan driving device 30 is disposed inside the base portion 13. A connector portion 18 having a plurality of input / output terminals is disposed on the back surface of the base portion 13.

  Next, the arrangement of each part of the drive device 16 inside the camera device 10 according to the present embodiment will be described with reference to FIG. Here, FIG. 3 is an arrangement diagram schematically showing the arrangement of each part of the driving device 16 inside the camera apparatus 10 according to the present embodiment. FIG. 3A is a perspective view of the inside from the front side of the camera apparatus 10. (B) is a perspective view of the inside from the side surface side of the camera device 10.

  As shown in FIG. 3A, for example, a tilt motor TM, a tilt gear unit 21, a tilt motor drive circuit 22, a tilt FFC winding unit 23 and the like are disposed inside the imaging unit support unit 11. Specifically, for example, a tilt gear unit 21 is disposed on the upper side and a tilt motor TM is disposed on the lower side inside the imaging unit support unit 11 on one side of the imaging unit 12 (right side in FIG. 3A). ing. On the other hand, inside the imaging unit support unit 11 on the other side of the imaging unit 12 (left side in FIG. 3B), for example, a tilt FFC winding unit 23 is arranged on the upper side and a tilt motor drive circuit 22 is arranged on the lower side. It is installed.

  As described above, the tilt motor TM, the tilt gear unit 21, and the tilt motor drive circuit 22 built in the imaging unit support unit 11 constitute a tilt drive device 20.

  The tilt motor TM is composed of a stepping motor, for example, and serves as a drive source for tilt drive. The tilt gear unit 21 includes a gear, a worm, a tilt rotation shaft, and the like, and is a mechanism that transmits the driving force of the tilt motor TM. The tilt drive circuit 22 is a circuit that controls the step drive of the tilt motor TM. The tilt driving device 20 can rotate the imaging unit 12 in the tilt direction based on a control signal from the camera control unit 14. Thereby, the imaging direction of the imaging unit 12 can be changed to the vertical direction.

  As shown in FIG. 3A or 3B, the base portion 13 includes, for example, a pan motor PM, a pan gear portion 31, a pan motor drive circuit 32, a pan FFC winding portion 33, and a connector portion 18. Etc. are arranged. Specifically, a pan gear 31 is disposed at a central portion inside the base portion 13. A pan motor drive circuit 32 is disposed on one side (left side in FIG. 3) of the pan gear portion 31, and a pan motor PM is disposed on the front side of the pan gear portion 31. A pan FFC winding unit 33 is disposed on the upper side of the pan gear 31.

  Thus, the pan motor PM, the pan gear unit 31, and the pan motor drive circuit 32 incorporated in the base unit 13 constitute a pan drive circuit 30.

  The pan motor PM is composed of a stepping motor, for example, and serves as a power source for driving the pan. The pan gear unit 31 is a mechanism that includes a gear, a worm, a tilt rotation shaft, and the like, and transmits a driving force of the pan motor PM. The pan motor drive circuit 32 is a circuit that controls the step drive of the pan motor PM. The pan driving device 30 can rotationally drive the imaging unit 12 in the pan direction based on a control signal from the camera control unit 14. Thereby, the imaging direction of the imaging unit 12 can be changed to the horizontal direction. Details of the structure of the base portion 13 will be described later.

  Further, the tilt FFC take-up unit 23 and the pan FFC take-up unit 33 provide some play so that, for example, the FFC is not loaded when the imaging unit 12 is rotated in the tilt direction / pan direction. This is the part that houses the spiral FFC.

  As described above, the camera apparatus 10 is configured as a pan / tilt driving mechanism integrated 3CCD camera in which the imaging unit 12 including the lens 121, the tilt driving circuit 20, and the pan driving circuit 30 are integrated. Is miniaturized.

  The camera device 10 transmits a high-quality, high-resolution digital video signal from the imaging unit 12 to the base unit 13 including the connector unit 18 such as a video output unit. Here, when the digital video signal is transmitted using only the FFC, in order to ensure the bending durability of the FFC, it is disposed on the tilt FFC take-up portion 23 disposed on the tilt rotation shaft and the pan rotation shaft. In the pan FFC take-up section 33, the FFC is spirally drawn. In such a structure, since the length of the FFC is inevitably increased, signal quality is deteriorated and unnecessary radiation is also increased.

  Therefore, in this embodiment, the pan rotation shaft (pan shaft) is made hollow so that the harness length is the shortest in order to maintain the signal bending quality and reduce unnecessary radiation while ensuring the bending durability of the harness. , Insert the harness. Hereinafter, the harness arrangement structure according to the present embodiment will be described in detail.

  First, the harness arrangement structure of the camera device 10 according to the present embodiment will be described with reference to FIG. Here, FIG. 4 is a perspective view showing a harness arrangement structure of the camera device 10 according to the present embodiment. FIG. 4 shows the camera apparatus 10 in a state where the outer shells of the imaging unit support unit 11 and the base unit 13 are removed.

  First, in this embodiment, two types of cables, a flat cable (for example, FFC) and another cable (for example, a twisted pair wire or a coaxial line) are used as the harness.

  These two types of cables are arranged as shown in FIG. 4 in order to transmit between the imaging unit 12 and the connector unit 18 provided in the base unit 13. The FFC 51 is arranged in a spiral shape from the imaging unit 12 in the tilt FFC winding unit 23, extends toward the base unit 13, and is arranged in a spiral shape in the pan FFC winding unit 33, and then supports the imaging unit. It is fixed on the upper surface of the bottom plate 25 of the part 11. Then, it is inserted into a hollow pan rotation shaft (pan shaft) and connected to the connector portion 18.

  On the other hand, the plurality of twisted pair wires 53 are fixed from the imaging unit 12 to the side surface of the imaging unit 12, for example, one surface of the tilt FFC winding unit 23 (for example, the left side surface in FIG. 4), and then supported by the imaging unit. It is fixed again on the upper surface of the bottom plate 25 of the part 11, and then inserted into a hollow bread rotating shaft (pan shaft) and connected to the connector part 18.

  The configuration of the camera device 10 according to the present embodiment is characterized in that the FFC 51 is arranged in a spiral shape to reduce not only the rotational load during pan rotation but also the harness length. Next, based on FIG. 5, the structure of the base part 13 which is the characteristic part of the camera apparatus 10 concerning this embodiment is demonstrated. Here, FIG. 5 shows a cross-sectional view of the base portion 13 of the camera apparatus 10 according to the present embodiment.

  As shown in FIG. 5, for example, a pan shaft 313 that is a rotation axis in the pan direction, bearings 314 and 315, a bearing pressing member 316, a gear 311, and a pan motor PM are provided in the base portion 13. And is covered with a base cabinet 317. A tilt chassis 318 attached to the pan shaft 313 is provided on the upper portion of the base portion 13.

  The pan shaft 313 is a rotation axis in the pan direction and is formed hollow. Two types of cables, the FFC 51 and the twisted pair wire 53, are inserted into the hollow portion of the pan shaft 313. The pan shaft 313 is provided with two bearings 314 and 315 so that the pan shaft 313 can rotate smoothly. The pan shaft 313 can be made of, for example, a metal material in consideration of electromagnetic shielding.

  The pan motor PM is a drive source for pan rotation driving, and for example, a stepping motor can be used. The pan motor PM meshes with a gear 311 fixed to the pan shaft 313, and integrally rotates the pan shaft 313 and the tilt chassis 318 attached thereto.

  The base cabinet 317 forms a chassis portion and an exterior of the base portion 13 and also functions as a housing for the bearing 314. The bearing pressing member 316 is a housing for the bearing 315. The bearing pressing member 316 is fixed by a base cabinet 317.

  The tilt chassis 318 disposed on the upper portion of the base portion 13 is connected to the pan shaft 313 and is pan-rotated integrally with the pan shaft 313. The imaging unit 12 is attached to the upper part of the tilt chassis 318, and rotates together with the pan rotation of the tilt chassis 318.

  Two types of cables, the FFC 51 and the twisted pair wire 53, are inserted into the pan shaft 313. Hereinafter, the detailed arrangement structure of these cables 51 and 53 will be described with reference to FIGS. FIG. 6 is a top perspective view of the base portion 13 of the camera apparatus 10 shown in FIG. FIG. 7 is a bottom view of the base portion 13 of the camera apparatus 10 shown in FIG. FIG. 8 is a perspective view showing the cable guide 57.

  As described above, after the FFC 51 is disposed in a spiral shape on the tilt chassis 318, one end of the FFC 51 on the pan shaft 313 side is inserted into the pan shaft 313. On the other hand, the twisted pair wire 53 is inserted into the hollow pan shaft 313 without being formed in a spiral shape.

  Here, the pan rotation angle of the camera apparatus 10 according to the present embodiment is about 340 ° rotation, and a large load is applied to the FFC 51 by the pan rotation. Therefore, the FFC 51 is arranged in a spiral shape on the tilt chassis 318 in order to reduce the rotational load on the FFC 51 and the rotational load on the pan motor PM. In the spiral portion, the size of the spiral changes according to the pan rotation. For example, as shown in FIG. 6, when the FFC 51 is arranged in a clockwise spiral shape, when the FFC 51 is rotated in the R direction, the size of the spiral is reduced. On the other hand, when rotating in the L direction, the size of the spiral increases. Thus, by giving play to the spiral, it is possible to prevent excessive addition to the FFC 51 due to rotation.

  At this time, the tilt chassis 318 is provided with a pair of harness guides composed of an upper part (upper harness guide 54) and a lower part (lower harness guide 55). This harness guide can be formed of plastic, for example. The lower harness guide 55 is placed on the tilt chassis 318, and the spiral FFC 51 is placed on the lower harness guide 55. Thereby, since the FFC 51 does not directly contact the metal tilt chassis 318, wear due to the contact between the FFC 51 and the tilt chassis 318 can be suppressed.

  On the other hand, an upper harness guide 54 is disposed above the FFC 51 disposed in a spiral shape. The upper harness guide 54 defines the movement range of the FFC 51. The upper harness guide 54 is provided on the tilt FFC take-up unit 23 as compared with the FFC 51 placed on a plane parallel to the placement surface of the camera apparatus 10 like the pan FFC take-up unit 33. Thus, the case where it provides in FFC51 provided in the surface perpendicular | vertical with respect to the mounting surface of the camera apparatus 10 works more effectively.

  Further, the FFC 51 inserted through the hollow portion of the pan shaft 313 is fixed by a cable guide 57 so as not to be twisted by pan rotation. As shown in FIG. 8, the cable guide 57 includes a substantially cylindrical cylindrical portion 573 inserted into the hollow portion of the pan shaft 313, and a bottom surface portion 574 for fixing the cable guide 57 to the bottom portion 41 of the base portion 13. It consists of. A separation member 571 for separating the internal space of the cable guide 57 is provided inside the cylindrical portion 573 so that the FFC 51 and the twisted pair wire 53 do not come into contact with each other. In addition, a fixing member 572 that is disposed in parallel with the separation member 571 with a predetermined gap 61 and fixes one end of the FFC 51 is provided inside the cylindrical portion 573.

  A separation space 63 is formed inside the cylindrical portion 573 by the separation member 571 provided in the cylindrical portion 573, and the twisted pair wire 53 is inserted into the separation space 63. Further, the FFC 51 is inserted into the gap 61 formed between the separation member 571 and the fixing member 572, and is fixed between the separation member 571 and the fixing member 572. Thus, by separating the two types of cables 51 and 53, the cables are prevented from coming into contact with each other and worn, and a distance is placed between the cables 51 and 53, so that electromagnetic interference can also be prevented. Furthermore, it is possible to prevent the cables 51 and 53 from being caught.

  The cables 51 and 53 inserted through the cylindrical portion 573 are passed through the lower side of the bottom surface portion 574 and are drawn out to the bottom 41 side of the base portion 13 as shown in FIG. The FFC 51 extends from a protruding portion 576 formed on one side of the bottom surface portion 574 of the cable guide 57 and is connected to, for example, a signal processing board. Further, the twisted pair wire 51 is fixed to the coaxial line fixing portion 575 of the cable guide 57 formed on the side facing the protruding portion 576, and then connected to, for example, a video processing substrate.

  For example, the bottom surface portion 574 of the cable guide 57 does not rotate integrally with the pan shaft 313, and the bottom surface portion 574 and the top surface of the bottom portion 41 of the base portion 13 are formed on the bottom surface portion 574. Bolts 577 are bolted by bolts. Thereby, the FFC 51 and the twisted pair wire 53 are fixed by being sandwiched between the bottom surface portion 574 of the cable guide 57 and the bottom portion 41 of the base portion 13.

  Further, the cable guide 57 can be formed of plastic, for example. As a result, it is possible to prevent the metal pan shaft 313 and the cables 51 and 53 that pass through the inside from coming into contact with the pan rotation and being worn and short-circuiting.

  Here, the arrangement of the cables 51 and 53 in the base portion 13 shown in FIG. 5 will be further described based on FIG. FIG. 9 is a layout diagram schematically showing the layout of the FFC 51 and the twisted pair wire 53 in the base portion 13.

  As shown in FIG. 9, the FFC 51 in the base portion 13 is spirally arranged in the lower harness guide 55 on the tilt chassis 318 in the portion A and the cable guide 57 as a winding axis in the portion A, and on the pan shaft 313 in the portion B. It is inserted through the inserted cable guide 57.

  Here, as shown in FIG. 9, the fixing member 572 of the cable guide 57 is formed with, for example, an oblique notch (hereinafter referred to as “inclined portion”) 572a in the width direction. The inclined portion 572a is provided to reduce a load caused by bending the FFC 51 when the FFC 51 is arranged from the portion A to the portion B. The FFC 51 according to the present embodiment is arranged such that the extending direction of the FFC 51 differs by about 90 ° between the portion A and the portion B. For example, the extending direction of the FFC 51 can be changed by about 90 ° by inclining the inclined portion 572a by about 45 °.

  At this time, in the portion B, the FFC 51 is sandwiched and fixed between the separation member 571 and the fixing member 572 of the cable guide 57. Since the bottom surface portion 574 of the cable guide 57 is fixed to the bottom portion 41 of the base portion, panning does not occur. Therefore, the FFC 51 located at the center of the spiral is also fixed so as not to rotate pan.

  Further, the FFC 51 on the outer peripheral side of the spiral is bent by about 90 ° and extends to the tilt FFC winding portion 23 so that the FFC 51 is bent at the center of the spiral. At this time, the FFC 51 is fixed by the FFC fixture 59, for example, on the upper surface of the bottom plate 25 of the imaging unit support unit 11 that rotates by panning before being arranged in a spiral shape by the tilt FFC winding unit 23. Therefore, the FFC 51 of the portion A also rotates while changing the size of the spiral in accordance with the pan rotation of the imaging unit support 11 with the center position of the spiral fixed by the cable guide 57 as the rotation axis. With such an arrangement, it is possible to suppress a load applied to the FFC 51 by pan rotation.

  Here, when the FFC 51 is arranged in a spiral shape, the diameter of the cable guide used as a winding shaft is preferably formed as small as possible. Thereby, the length of FFC51 made into a spiral shape can be shortened.

  On the other hand, the load applied by the pan rotation on the twisted pair wire 53 in the base portion 13 is not so large as compared with the FFC 51. For this reason, the twisted pair wire 53 is inserted through the cable guide 57 as it is without being arranged in a spiral shape. Even in this case, the twisted pair wire 53 is fixed by, for example, a plastic cable clamp 58 on the upper surface of the bottom plate 25 of the imaging unit support unit 11 that rotates in a panning manner so that the rotational load is not applied as much as possible. In addition, in order to prevent contact with the FFC 51, the twisted pair wire 53 is inserted into the separation space 63 side formed by the separation member 571 of the cable guide 57.

  The cable arrangement structure of the FFC 51 and the twisted pair wire 53, which is a characteristic part of the present embodiment, has been described above. By adopting the cable arrangement as described above, it is possible to reduce the load caused by bending and rotation on each cable, and further to shorten the cable length. Therefore, the durability of the cable can be maintained, and unnecessary radiation generated due to the long cable length can be reduced.

  In the camera device 10 according to the present embodiment, since the pan rotation has a wide movable range of about 340 °, the above cable arrangement works particularly effectively. For example, the tilt rotation of the camera device 10 according to the present embodiment is about 120 °, and its movable range is not wide compared to the pan rotation. For this reason, even if the tilt rotation shaft is not a hollow shaft, no major problem occurs due to the twist of the cable.

  The camera device 10 according to the first embodiment has been described above. In such a camera device 10, the length of the cable connecting the imaging unit 12 and the base unit 13 can be shortened by making the pan shaft 313 hollow. With this configuration, it is possible to reduce interference between signals that has occurred due to the long cable length. In addition, by fixing the cable inserted through the pan shaft 313, particularly the FFC 51, in the vicinity of both ends of the pan shaft 313, the cable is not twisted even when the pan is rotated, and the durability of the cable can be ensured. it can.

  Next, as a second embodiment, an interface configuration when the camera device 10 according to the first embodiment is used will be described with reference to FIG. Here, FIG. 10 is a block diagram showing an interface configuration of the camera apparatus 10 according to the present embodiment.

(Second Embodiment)
The camera device 10 according to the first embodiment is intended to ensure the quality of signals transmitted by the harness by ensuring the durability of the harness and shortening the harness length. In order to achieve this object, in this embodiment, in the camera device 10 according to the first embodiment, a twisted pair line 53 is applied to a digital video signal (such as a luminance signal and a color signal that greatly affects the quality of the video) and a clock signal. For other signals, the FFC 51 is used. The coaxial line or the twisted pair line 53 is easy to manage impedance and is suitable for the purpose of ensuring signal quality.

  Here, in order to reduce the size of the camera device 10, the thickness of the harness inserted through the pan shaft 313 is preferably as thin as possible. Therefore, an LVDS transmitter IC that is advantageous in terms of radiation is used for transmission of digital video data. As a result, the 28-bit parallel signal such as the luminance signal (Y) and the color signal (C) and the clock signal are converted into a 5-channel serial signal and transmitted through the five twisted pair lines 53 at the movable part on the transmission side. be able to.

  In the base unit 13 on the receiving side, the 5-channel serial signal is restored to a 28-bit parallel signal and a clock signal by the LVDS receiver IC. Thus, by using the LVDS transmitter / receiver IC, the number of twisted pair lines 53 can be reduced, and the quality of the video signal transmitted through the twisted pair lines 53 can be maintained. On the other hand, other control signals are transmitted using two FFCs 51.

  With this configuration, the video signal is transmitted through a coaxial line or twisted pair line 53 that is impedance-controlled, so that the level of unnecessary radiation can be reduced and a high-quality video can be provided. In addition, since the camera device 10 according to the present embodiment is configured to insert the cable through the hollow portion of the pan shaft 313, the cable length can be shortened. As a result, it is possible to reduce interference between signals caused by a long cable length. Further, since the separation member 571 provided in the cable guide 57 inserted into the pan shaft 313 is inserted through each space where the FFC 51 and the twisted pair wire 53 are separated, a distance is set between these cables 51 and 53. It is burned. Thereby, electromagnetic interference between other control signals and video signals can be suppressed. Furthermore, since the number of cables can be reduced by using the LVDS transmitter / receiver IC, the cables can be easily routed and the camera device 10 can be downsized.

  The second embodiment has been described above. In such a camera device 10, an optimum cable is used according to the purpose of the signal to be transmitted. At this time, the configuration of the camera device 10 according to the first embodiment can solve the problems in the cable arrangement such as the cable length and the contact between the cables. Furthermore, since the number of cables can be reduced by using the LVDS transmitter / receiver IC, the cables can be easily routed and the camera device 10 can be downsized.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are of course within the technical scope of the present invention. Understood.

  For example, although the pan shaft 313 according to the above embodiment is made of metal, the present invention is not limited to such an example, and may be formed of plastic, for example. In this case, since wear due to contact between the pan shaft 313 and the cables 51 and 53 is reduced as compared with the case where the metal pan shaft 313 is used, the cable guide 57 may not be provided. At this time, a separation member 571 for separating the FFC 51 and the twisted pair wire 53 may be separately provided in the pan shaft 313.

  Further, the fixing member 572 of the cable guide 57 according to the above-described embodiment is formed with the inclined portion 572a of about 45 ° in order to reduce the load when the FFC 51 is bent. The present invention is not limited, and it is sufficient that the extending direction of the FFC 51 is changed by about 90 ° so that the FFC 51 is not subjected to a load during bending. For example, the FFC 51 may be bent in two stages.

  Furthermore, in the camera device 10 according to the above-described embodiment, the signal transmitted from the imaging unit 12 is a digital signal, but the present invention is not limited to this example, and may be an analog signal. Even in this case, since the length of the cable inserted through the pan shaft 313 can be shortened, the structure of the camera device 10 can be reduced in that the interference between signals caused by the long cable length can be reduced. It is valid.

  The present invention can be applied to a drive device, and in particular, can be applied to a drive device that rotates a camera device.

It is a block diagram which shows the structure of the camera apparatus concerning the 1st Embodiment of this invention. (A) is a front view which shows the external appearance of the camera apparatus concerning 1st Embodiment, (b) is a side view which shows the external appearance of the camera apparatus concerning 1st Embodiment. FIG. 2 is an arrangement diagram schematically showing the arrangement of each part of the driving device inside the camera apparatus according to the first embodiment, wherein (a) shows through the inside from the front side of the camera apparatus, and (b) shows the camera. The inside is seen through from the side of the device. It is a perspective view which shows the harness arrangement structure of the camera apparatus concerning 1st Embodiment. It is sectional drawing which shows the base part concerning 1st Embodiment. It is a perspective view which shows the upper surface of the base part shown in FIG. It is a bottom view of the base part shown in FIG. It is a perspective view which shows the cable guide concerning 1st Embodiment. FIG. 3 is a layout diagram schematically showing the layout of FFCs and twisted pair wires in a base portion according to the first embodiment. It is a block diagram which shows the interface of the camera apparatus concerning 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Camera apparatus 11 Imaging part support part 12 Imaging part 13 Base part 18 Connector part 313 Pan shaft 51 FFC
53 Twisted Pair Wire 54 Upper Harness Guide 55 Lower Harness Guide 57 Cable Guide 571 Separating Member 572 Fixed Member 572a Inclined Part PM Pan Motor

Claims (9)

A drive device comprising a movable part and a base part for rotatably supporting the movable part:
The rotating shaft portion of the base portion is hollow,
The driving device according to claim 1, wherein the conducting wire inserted through the rotating shaft is fixed at both ends of the rotating shaft. The conducting wire is configured to include a flat cable,
The flat cable is arranged in a spiral on the plane perpendicular to the rotation shaft portion around the rotation shaft portion of the base portion at the movable portion,
2. The driving device according to claim 1, wherein one end of the spirally arranged flat cable is bent and inserted through the rotating shaft portion. A camera device including an imaging unit that images a subject, a movable unit that supports the imaging unit, and a base unit that rotatably supports the imaging unit and the movable unit:
The rotating shaft portion of the base portion is hollow,
A camera device, wherein a conducting wire inserted through the rotating shaft portion and connecting the imaging unit and the base portion is fixed at both ends of the rotating shaft portion. The conducting wire is configured to include a flat cable,
The flat cable is arranged in a spiral on the plane perpendicular to the rotation shaft portion around the rotation shaft portion of the base portion at the movable portion,
The camera device according to claim 3, wherein one end of the spirally arranged flat cable is bent and inserted into the rotating shaft portion.   The camera device according to claim 4, wherein the conducting wire includes at least one of a coaxial wire and a twisted pair wire.   The camera device according to claim 3, wherein the rotation shaft portion includes a separation member that separates an inside of the rotation shaft portion.   The camera apparatus according to claim 6, wherein a substantially cylindrical cable guide having the separating member is inserted into the rotating shaft portion. The separating member is composed of two plate-like members,
The camera device according to claim 6, wherein the flat cable is fixed by being sandwiched between the two plate-like members. The camera device according to claim 4, wherein the spirally arranged flat cable includes a harness guide that surrounds the flat cable.

Images