JP2007281575A - Cable disconnection detector, camera device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable disconnection detector which can restrain the possibility of disconnection by enhancing the durability of a flat cable, and can warn disconnection upon the occurrence, without interrupting signal transmission, and to provide a camera device and an electronic apparatus. <P>SOLUTION: The cable disconnection detector comprises a flat cable 28, connecting between a relay circuit board and a CPU circuit board, in which a plurality of lines are arranged, with first and second lines arranged as a disconnection detection line 28e along the side edge 28d contiguous thereto and other signal lines; a pull-up power supply for applying a pull-up voltage to the disconnection detection line 28e; a means for warning the signal line, when the disconnection detection line 28e is disconnected; and a central control unit 20 mounted on the first and second substrates, and making the warning means operate, when the pull-up voltage is detected as input signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a cable disconnection detection device that can increase the durability of a flat cable, suppress the possibility of disconnection, prevent signal transmission from being interrupted even if disconnection occurs, and issue a warning. The present invention relates to a camera device and an electronic device.

  Recently, network cameras that distribute images when accessed via an IP network have become widespread. In this network camera, the imaging direction of the camera unit can be changed to a pan direction and a tilt direction, and the network camera body that supports the camera unit is used by being fixed at a mounting location or being stationary.

  For this reason, a CPU board is provided on the main body side of the network camera, and it is necessary to rotate the camera unit on which the camera board is mounted around two axes of pan and tilt. Both boards are flexible flat cables (hereinafter referred to as FFC). ) Or a flexible printed circuit board (Flexible Print Circuit, hereinafter referred to as “FPC”) or the like, and can absorb the movement of the camera unit. In these flexible cables, about ten to forty signal lines are arranged in parallel and connected to each interface of the CPU board, camera board, and relay board. In addition, thin flat flexible cables represented by FFC and FPC are collectively referred to as flat cables hereinafter.

  However, network cameras equipped with such moving parts can repeatedly change the direction of the lens, and the cable is repeatedly pulled and bent, so there is a possibility that the signal line on which the metal layer etc. is printed will be burdened and disconnected. . Such disconnection of the flat cable is not limited to the network camera. A similar phenomenon occurs if the device includes a movable part. Speaking of the camera device, a camera-integrated VTR, a digital camera, and a recording type surveillance camera are also provided with a movable part, and the same.

  Therefore, as a disconnection monitoring device for a transmission path of a device having such a movable part, a disconnection monitoring device for determining whether or not a disconnection is made by superimposing a DC component on a transmission signal and using this as a criterion for disconnection. Has been proposed (Patent Document 1). However, although the disconnection monitoring device of this (Patent Document 1) can determine whether or not the disconnection has occurred, the disconnection has already occurred at the time when the abnormality is determined, and the camera cannot be operated at this point, so it does not perform the function of the camera. I couldn't prevent it.

  On the other hand, the voltage drop is detected by the comparison control circuit on the camera side at the time of disconnection, and when the voltage drop is detected, a control signal is sent to the camera control circuit. At this time, if there is no control signal from the control device that supervises the surveillance camera system, it is considered that the cable is disconnected, and if there is a control signal, a surveillance camera system that returns the power supply method to the control circuit to the normal state has been proposed ( Patent Document 2).

Further, as an FPC holding structure, there has been proposed an FPC stopper structure that can ensure a predetermined amount of rotation of an electronic device having a rotating part (Patent Document 3). This is because the retaining protrusion provided on the FPC is inserted into the opening with play with respect to the longitudinal movement of the FPC, and the movement of the retaining protrusion is limited within the width of the opening, When connecting the connector to the connector of the circuit board, the retaining protrusion is pulled out by the width of the opening and connected.
JP-A-2-296432 JP-A-7-245756 JP 2004-40337 A

  Although the conventional cable disconnection detection device can detect that a disconnection has occurred as a result, no means for preventing it has been taken. For example, the cable disconnection detection device of (Patent Document 1) can detect an abnormality when an abnormality occurs, but recording has already been interrupted at a time when the abnormality has occurred.

  On the other hand, the cable disconnection detection apparatus of (Patent Document 2) can leave a camera recording using an internal power supply even if a power failure or disconnection occurs. However, the fact that the control signal is not transmitted is a criterion for detecting the disconnection. If there is no internal power supply, the recording will be interrupted. If it is necessary to leave the camera recording, the internal power supply in addition to the power supply for the entire system, etc. Was necessary. This increases costs and increases size.

  The FPC stopper structure of (Patent Document 3) prevents the FPC from being pulled out excessively by a retaining protrusion, and the FPC wound around the shaft is secured by a predetermined amount by using winding and play when being pulled out. Is done. However, the FPC stopper structure of (Patent Document 3) does not consider at all how to prevent the disconnection of the FPC signal line caused by the rotation of the camera unit.

  As described above, the conventional cable disconnection detection device is merely a device that detects after the disconnection that any of the signal lines is disconnected, and has an movable part, and it is inevitable that the device repeatedly rotates. On the other hand, it was comprised so that a disconnection of a signal line might be prevented, the disconnection was alert | reported previously, and the durability of a flat cable was not improved.

  Moreover, the conventional FPC stopper structure contributes to the workability at the time of manufacture and the miniaturization of the equipment for the electronic equipment using the FPC, but it ensures the disconnection of the signal line that occurs because the rotating part rotates repeatedly. It was not intended to improve the durability of the flat cable.

  Accordingly, the present invention can improve the durability of a flat cable, suppress the possibility of occurrence of disconnection, and does not interrupt signal transmission even if disconnection occurs, and a cable disconnection detection device and a camera device that can warn And it aims at providing an electronic device.

  In order to solve the above-described problem, the cable disconnection detection device according to the present invention uses at least one of the first and second wirings along the edge arranged adjacent to both side edges as a disconnection detection line and other than this. Using a wiring as a signal line, a flat cable connecting the first substrate and the second substrate, a pull-up power source for applying a pull-up voltage to the disconnection detection line, and a signal line when the disconnection detection line is disconnected The main features include warning means that can issue a disconnection warning, and a control unit that is mounted on at least one of the boards and operates the warning means when a pull-up voltage is detected as an input signal. To do.

  According to the present invention, the durability of the flat cable can be increased, the possibility of disconnection of the flat cable is suppressed, signal transmission is not interrupted even if the disconnection occurs, and the signal line of the flat cable is disconnected. A warning can be given if a possibility arises. Which line of the flat cable is disconnected can be notified by warning means, and warnings can be divided into warnings with sufficient margins and warnings with high urgency.

  According to the first aspect of the present invention, at least one of the first and second wirings along the edge arranged adjacent to both side edges is used as a disconnection detection line, and the other wiring is used as a signal line. A flat cable connecting between the first board and the second board, a pull-up power source for applying a pull-up voltage to the disconnection detection line, and a disconnection warning for the signal line when the disconnection detection line is disconnected A cable disconnection detection device comprising: warning means capable of operating; and a control unit that is mounted on at least one of the boards and operates the warning means when a pull-up voltage is detected as an input signal . With this configuration, the durability of the flat cable can be increased, the possibility of disconnection of the flat cable is suppressed, signal transmission is not interrupted even if the disconnection occurs, and the signal line of the flat cable may be disconnected If this happens, a warning can be issued.

  The invention according to claim 2 of the present invention is a form subordinate to the form of claim 1 and accommodates the flat cable with play in the accommodation length in order to relay and hold the flat cable. The cable break detection device is characterized in that a cable holder is provided. Since there is play in the accommodation length of the flat cable accommodated in the cable holder, the possibility of disconnection can be suppressed.

  The invention according to claim 3 of the present invention is a form subordinate to the form of claim 1 or claim 2, wherein the warning means notifies the fact when the first and second wirings are not disconnected. 1st light emission means which light-emits 1 notification color, and 2nd light emission means which light-emits 2nd notification color when both 1st and 2nd wiring breaks, 1st or 2nd When the disconnection detection line is disconnected, it is a cable disconnection detection device that displays a third notification color by light emission or non-light emission of the first and second light emitting means, and which wire of the flat cable is disconnected The disconnection warning light can be notified, and can be divided into a notification indicating safety, a slightly marginal warning, and a highly urgent warning.

  The invention according to claim 4 of the present invention is a form subordinate to any one of claims 1 to 3, and is another flat connecting between the second substrate and the third substrate. A cable breakage detecting device, characterized in that a cable is provided, and the other flat cable is also provided with a breakage detection line and a signal line, and the other flat cable is connected to the flat cable via the second substrate. Even when multiple boards are connected between boards, the durability of the flat cable can be increased, the possibility of breakage of the flat cable can be suppressed, and signal transmission can be interrupted even if the breakage occurs. If there is a possibility that the signal line of the flat cable is disconnected, a warning can be issued.

  According to a fifth aspect of the present invention, there is provided a movable portion provided with a first substrate on which an image sensor is mounted, and a main body portion that mounts the second substrate and rotatably supports the movable portion. The camera device includes a first cable and a second cable connected by a flat cable, the flat cable is provided with a disconnection detection line and a signal line, and the first cable is used to detect the disconnection of the flat cable. A camera device having a cable breakage detection device according to any one of the first to fourth embodiments mounted thereon. With this configuration, even if the camera device can rotate the direction of the lens, the durability of the flat cable is not reduced, the possibility that the flat cable will be disconnected is suppressed, and signal transmission will be interrupted even if the disconnection occurs. If there is a possibility that the signal line of the flat cable may be disconnected, a warning can be issued.

  According to a sixth aspect of the present invention, the movable part has a tilt unit that mounts the first substrate and rotates in the tilt direction, and a relay substrate that mounts the tilt unit so that the tilt unit can rotate in the pan direction. A supporting pan unit, and the first board and the relay board are connected by a first flat cable, and the relay board and the second board are connected by a second flat cable. Each of the first and second flat cables is provided with a disconnection detection line and a signal line, respectively, and is connected to each of the first and second flat cables to detect the disconnection of the first and second flat cables. The camera device is characterized in that a cable breakage detection device on which the cable breakage detection device is mounted is mounted. This configuration does not reduce the durability of the flat cable, suppresses the possibility of disconnection of the flat cable, does not interrupt signal transmission even if the disconnection occurs, and may break the signal cable of the flat cable If this happens, a warning can be issued.

  According to a seventh aspect of the present invention, there is provided an electronic apparatus comprising: a movable portion provided with the first substrate; and a main body portion that mounts the second substrate and rotatably supports the movable portion. The first board and the second board are connected with a flat cable, and a disconnection detection line and a signal line are provided on the flat cable. In order to detect the disconnection of the flat cable, first to fourth An electronic apparatus comprising a cable disconnection detection device according to any one of the embodiments. With this configuration, even if the camera device can rotate the direction of the lens, the durability of the flat cable is not reduced, the possibility that the flat cable will be disconnected is suppressed, and signal transmission will be interrupted even if the disconnection occurs. If there is a possibility that the signal line of the flat cable may be disconnected, a warning can be issued.

Example 1
A camera device or electronic device, particularly a network camera cable disconnection detecting device in Embodiment 1 of the present invention will be described. 1 is a system configuration diagram of a network camera according to a first embodiment of the present invention, FIG. 2 is a schematic perspective view of an internal structure of the network camera according to the first embodiment of the present invention, and FIG. 3 is a network camera according to the first embodiment of the present invention. Fig. 4 is a functional configuration diagram, Fig. 4 is an explanatory view of bending of the first flat cable in Embodiment 1 of the present invention before mounting the cable holder, and Fig. 5 is mounted in the cable holder of the first flat cable in Embodiment 1 of the present invention. FIG. 6 is an assembly process diagram of the first flat cable to the cable holder in the network camera according to the first embodiment of the present invention, and FIG. 7 is a cable showing the second flat cable in the network camera according to the first embodiment of the present invention. FIG. 8 is a front view of the network camera according to the first embodiment of the present invention. It is an assembly process diagram for the cable holder.

  In FIG. 1, reference numeral 1 denotes a network camera (camera apparatus or electronic device of the present invention) that can change the imaging direction in two axial directions of pan and tilt. Here, pan is an operation of rotating the optical axis of the imaging lens 5 (described later) in the horizontal direction, and tilt is an operation of rotating the elevation angle of the optical axis.

  Reference numeral 2 denotes a tilt unit that is mounted with a camera substrate and can rotate integrally in the tilt direction. Reference numeral 3 denotes a pan unit that supports the tilt unit 2 so as to be rotatable about a vertical axis and rotates in the pan direction. Reference numeral 4 denotes a main unit that mounts a CPU board and rotatably supports the pan unit 3 and simultaneously supports the tilt unit 2 accommodated in the pan unit 3. An imaging lens 5 is an imaging lens that can be moved to an in-focus position to perform AF (automatic focusing) control. In addition, the imaging lens 5 with a fixed focus may be used. 6 is a disconnection warning light (warning means of the present invention) that warns (informs) when a dummy wiring of a flat cable described below is disconnected, and warns (notices) that a signal line may be disconnected. is there.

  Reference numeral 7 denotes a TCP / UDP such as the Internet or an intranet, an IP network that communicates by IP, and reference numeral 8 denotes a communication terminal that can access the network camera 1 via the IP network 7.

  Next, the internal structure of the network camera 1 will be described with reference to FIG. In FIG. 2, 17 is a tilt motor that rotates the tilt unit 2 in the tilt direction, and 19 is a pan motor that rotates the pan unit 3 in the pan direction. 21 is housed in the main unit 4, and includes a CPU (central processing unit), communication control, a chip of a processor for various uses for image compression, and a main body control unit on which a circuit for connecting them is mounted on a substrate. Is a relay control unit which is mounted on the pan unit 3 and relays output data from the camera board via a number of signal lines, and a processor and other circuits for controlling the tilt motor 17 are mounted on the relay board. In other words, the physical structure of the main body controller 21 is mainly a CPU board, and the relay controller 22 is a relay board.

  Next, 23 and 24 are cable holders that wind a flat cable around a central columnar body to leave play (freedom) in the accommodation length, and prevent excessive pulling and bending by rotation of pan and tilt, and 26 is a tilt motor. A belt wheel 25 a that decelerates the rotational speed of 17 and transmits it to the tilt unit 2, and 25 a is a belt that drives the belt wheel 26 by the tilt motor 17. Similarly, reference numeral 26 denotes a belt wheel that decelerates the rotational speed of the pan motor 19 and transmits it to the pan unit 3, and reference numeral 26 a denotes a belt that drives the belt wheel 26 by the pan motor 19.

  Reference numeral 27 denotes a flat cable for connecting an output from a camera board (not shown) of the tilt unit 2 to the relay control unit 22 via the cable holder 23, and 28 denotes the relay control unit 22 and the main body control unit 21 via the cable holder 24. It is a flat cable that connects between the two. Details of the flat cables 27 and 28 and the cable holders 23 and 24 will be described later.

  Next, a configuration for executing the function of the network camera 1 will be described with reference to FIG. 11 is a camera unit provided in the tilt unit 2, 12 is an image pickup unit that receives light from the image pickup lens 5 and performs photoelectric conversion such as a CCD or CMOS image pickup device for picking up an object, and 13 is an image from the image pickup unit 13. This is a video signal processing unit that processes R, G, B signals or complementary color signals, and generates luminance signal Y and color difference signals Cr, Cb. When performing AF control, it is controlled by an AF control unit (not shown) provided in the camera unit 11. The video signal processing unit 13 performs contour correction, γ correction processing, and the like.

  An image signal compression unit 14 captures the luminance signal Y and the color difference signals Cr and Cb output from the video signal processing unit 13 at a predetermined timing and compresses these signals into a JPEG format, an MPEG format, or the like. The signal from the video signal processing unit 13 is transmitted to the image signal compression unit 14 via the flat cables 27 and 28, and the image signal compression unit 14 quantizes, encodes, and outputs the result. A communication unit 15 performs communication with the IP network 1 of the network camera 1.

  The communication unit 15 can also communicate with a protocol other than HTTP. For example, when a protocol such as FTP or RTP is used, an FTP server, an RTP server, or the like is mounted instead of the Web server.

  Reference numeral 16 denotes a tilt motor control unit that controls driving of the tilt motor 17 mounted on the relay control unit 22 of the tilt unit 2, and reference numeral 18 denotes pan motor control that controls driving of the pan motor 19 mounted on the main body control unit 21 of the pan unit 3. Part. Reference numeral 20 denotes a central control unit which is a function realizing means composed of a CPU as hardware and a control program as software. A function realizing means for reading the control program into the CPU and performing each function is realized. Although not shown, the CPU is provided with a storage unit for reading and executing control programs and various data.

  Now, details of the flat cables 27 and 28 and the cable holders 23 and 24 of the network camera 1 according to the first embodiment will be described.

  First, the bending process before mounting the flat cable 27 will be described with reference to FIG. The flat cable 27 is used by being bent as shown in FIG. Here, 27a is an end portion on the insertion side of the flat cable 27, 27b is a central portion where the flat cable 27 is loosely wound (with play) in the cable holder 23, and 27c is an end portion of the flat cable 27 on the camera substrate side. It is. The central portion 27b is bent in a step shape at a position shifted from the end portion 27a inserted into the cable holder 23 by approximately one width in a stepped state, and then continues in a parallel extended state. It is configured to be bent at a right angle in the opposite direction (180 °) to the first bending direction.

  Here, in the network camera 1 according to the first embodiment of the present invention, the tilt unit 2 and the pan unit 3 are repeatedly rotated up and down and left and right, respectively, whereby the pulling and bending of the flat cable 27 are repeated many times. For this reason, the flat cable 27, particularly the signal line of the central portion 27b that is loosened or bent, is provided with the following configuration so as not to be disconnected.

  That is, 27d shown in the enlarged view of FIG. 4 is an edge of a side edge (lateral width direction) of the flat cable 27, and 27e is an edge 27d (of both signal lines provided in the flat cable 27). The wiring provided adjacent to both side edges) is a disconnection detection line used for detecting disconnection as a dummy unused wiring, not as a signal line. Accordingly, wiring other than the disconnection detection line 27e can be used as a signal line.

  The disposition of the disconnection detection line 27e is based on the following knowledge of the present inventors. That is, the present inventor repeated experiments to loosen or narrow the flat cable 27 of the network camera 1, and the signal lines of the flat cable 27 do not have all the signal lines disconnected at the same probability, but are connected to the edges 27 d on both sides. It was discovered that adjacent wiring was first disconnected, that is, the wiring along the edge (adjacent) provided adjacent to the edge 27d (edges on both sides) was disconnected first, and the probability of occurrence of the disconnection was extremely high.

  The disconnection of the wiring at both side edges is caused by rubbing with the case and other parts where the vicinity of the edge 27d of the flat cable 27 is fixed, and this makes the edge 27d easily scratched. If the edge 27 is damaged, the inside is affected from there and the wire breaks.

  Further, from the viewpoint of the structure of the flat cable 27, it is a portion near the both ends of the signal line that receives the greatest stress concentration and tension due to torsion, force, and bending with respect to the flat cable 27 and is therefore adjacent to the edge 27d. It is considered that the signal line is disconnected. Therefore, in the present invention, the wiring adjacent to the edge 27d on both side edges is used as a dummy, and this is used as the disconnection detection line 27e, and used to warn and notify the disconnection. Details will be described later.

  As described above, after the flat cable 27 is bent, the flat cable 27 is bent at the center of the lateral width of the central portion 27b as shown in FIG. 4 (2), and the end portion 27c is bent as shown in (3). When folded in (2), it is folded in the same direction and overlapped on the end of the central portion 27b. Fold in an L shape. In the first embodiment, as shown in FIG. 4 (1), a cut is provided at the center of the central portion 27b to facilitate folding. Thereafter, the portion where only the end portion 27c is further overlapped is folded in the longitudinal direction and is overlapped. Thereby, the flat cable 27 to be attached to the cable holder 23 is completed. Note that the above-described cut in the central portion 27b or bending using the center portion 27b is not necessarily required, and may be omitted depending on circumstances. Further, when the wiring adjacent to the edge 27d on one side edge is considerably separated from the edge 27d, the number of disconnection detection lines 27e may be one.

  Subsequently, a state in which the flat cable 27 obtained in this way is attached to the cable holder 23 and an assembling process are shown in FIGS. 5 and 6, reference numeral 23a denotes a cable winding body in which a winding columnar body is erected at the center of the cable holder 23 and includes a ring-shaped depression, and 23b denotes a core body that is the winding columnar body. , 23c is an outlet for taking out the end 27a on the insertion side of the flat cable 27 from the cable holder 23, and 23d is a cover that covers the cable winding body 23a while the flat cable 27 is wound.

  Based on FIG. 6, the assembly | attachment mounted to the cable holder 23 of the flat cable 27 is demonstrated. The flat cable 27 bent in the description of FIG. 5 is inserted into the take-out port 23c and pulled out, and the central portion 27b is bent at 90 ° at the bent portion with the end portion 27a to stand in the axial direction of the core body 23b. Is routed around the core 23b. The core body 23b is wound a plurality of times in a loosely wound state with play, and then bent again by 90 ° at the bent portions of the central portion 27b and the end portion 27c, and drawn out from the opening of the lid body 23d to complete the assembly.

  The above is an explanation of the assembly of the flat cable 27 and the cable holder 23, but the assembly of the flat cable 28 and the cable holder 24 that connect between the main unit 4 and the pan unit 3 that rotatably supports the pan unit 3. Do the same. Hereinafter, the configuration of the flat cable 28 and its assembly process will be described.

  The flat cable 28 is also bent in advance in the same manner across the flat cable 27 and the central portion. In FIG. 7, 28 a is an end portion on the insertion side of the flat cable 27, 28 b is a central portion that is loosely wound in the cable holder 23, and 28 c is an end of the flat cable 28 that is connected to the relay control portion 22. Part. That is, the flat cable 28 is also composed of a center portion 28b and an end portion 28c that have play with the end portion 28a on the insertion side.

  A state in which the flat cable 28 is mounted on the cable holder 24 and an assembly process for incorporating the motor 19 are shown in FIGS. In FIG. 7, 24 a is a cable winding body in which a columnar body is erected at the center of the cable holder 24 and has a ring-shaped recess for accommodating the flat cable 28, and the outer periphery is a belt wheel 26, and 24 b is the flat cable 28. A core body that is a columnar body for winding, 24c is a mounting plate for rotatably mounting the cable winding body 24a, and 24d is a cover that covers the cable winding body 24a in a state where the flat cable 28 is wound.

  An assembly in which the flat cable 28 is attached to the cable holder 24 and the motor 19 is assembled will be described with reference to FIGS. First, the A part for assembling the assembly in which the flat cable 28 is inserted into the cable holder 24 in FIG. 7 will be described. The mounting plate 24c and the cable winding body 24a are rotatably attached by matching the position of the opening (not shown) from the cable winding body 24a of the flat cable 28 and the opening of the mounting plate 24c. The flat cable 28 is inserted into this outlet and pulled out from the opening of the mounting plate 24c.

  In this state, the central portion 28b is bent 90 ° at a bent portion with the end portion 28a, and the central portion 28b is rotated around the core body 24b. After winding the core body 23b with a storage length having a play, the core body 23b is bent at 90 ° at the bent portions of the central portion 28b and the end portion 28c, and is pulled out from the opening of the lid body 24d through a locking portion (not shown). Assembly is complete.

  Next, a process of incorporating the pan motor 19 into the mounting plate 24c will be described. The A part cable winding body 24a in which the flat cable 28 described in FIG. 7 is inserted into the cable holder 24 is used as a belt wheel 26, and the belt 26a is hung around the outer periphery of the belt motor 26, and the pan motor 19 attached to the back surface of the mounting plate 24c. It is stretched around a belt belt wheel (not shown). Accordingly, the rotation of the pan motor 19 is decelerated and transmitted to the cable holder 24 via the belt 26a, and the pan unit 3 to which the lid portion 24d of the cable holder 24 is attached can be rotated in the pan direction.

  The first embodiment of the present invention has a configuration in which the wiring of the flat cable 27 is not disconnected, and the wiring adjacent to the edge 27d on both side edges is used as the disconnection detection lines 27e and 27e as signal lines. It is used to warn of disconnection in the wiring used. 9 (a), (b), (c), FIG. 10 (a), (b), FIG. 11 (a), (b), FIG. 12 (a), (b), FIG. ), (B), the disconnection detection and disconnection warning of the first embodiment will be described.

  FIG. 9A is a configuration diagram in which the cable disconnection detection device in the network camera according to the first embodiment of the present invention is configured as one disconnection detection circuit with two wirings of one flat cable, and FIG. 9B is a diagram of the present invention. FIG. 9C is a configuration diagram in which the cable disconnection detection device in the network camera of the first embodiment is configured with two disconnection detection circuits with two wires of one flat cable, FIG. 9C is an enlarged view of the disconnection detection line, and FIG. FIG. 10B is a configuration diagram in which the cable disconnection detection device in the network camera according to the first embodiment of the present invention is configured as one disconnection detection circuit with two flat cables and two wires respectively, and FIG. 10B is a first embodiment of the present invention. FIG. 11A is a configuration diagram in which the cable disconnection detecting device in the network camera of FIG. 11 is configured with two disconnection detection circuits using two flat cables, and FIG. FIG. 11B is a diagram illustrating a first configuration in which the bull disconnection detection device is configured to include four disconnection detection circuits using two flat cables. FIG. 11B illustrates the cable disconnection detection device in the network camera according to the first embodiment of the present invention. FIG. 12 (a) is a second block diagram showing four disconnection detection circuits with cables. FIG. 12 (a) shows a cable disconnection detection device in the network camera according to the first embodiment of the present invention using a single flat cable and a logic circuit. FIG. 12B is a diagram for explaining the operation, and FIG. 13A is a diagram showing a cable disconnection detecting device in the network camera according to the first embodiment of the present invention and a single flat cable. FIG. 13B is a detailed configuration diagram of the two disconnection detection circuits when the LED is turned on using the CPU, and FIG.

  The cable disconnection detection device in the network camera 1 according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 9 to 13, particularly FIG. 9C, 28 d is an edge on both side edges of the flat cable 28, and 28 e is a plurality of wirings provided on the flat cable 28, and It is the 1st disconnection detection line which used wiring nearest to each for disconnection detection. Reference numeral 28f denotes a nearest second disconnection detection line adjacent to the first disconnection detection line 28e. The first disconnection detection line 28e and the second disconnection detection line 28f are two wirings in the vicinity of both edges 28d, and a circuit for detecting disconnection by any of the circuits described below, Of the four lines, which signal line (1 to 4) is to be used is determined depending on whether the line break is notified. When the wiring adjacent to one edge 28d is considerably separated from the edge 28d, the first disconnection detection line 28e and the second disconnection detection line 28f may each be one. In some cases, only the first disconnection detection line 28e may be used. In this case, a disconnection detection circuit as shown in FIGS. 9B, 10B, 11A, and 13B is used.

  Since the network camera 1 according to the first embodiment uses at least two wires near the edge 28d as a dummy for detecting disconnection and does not use it as a signal line for signal transmission, the network camera 1 is panned and tilted. Even if the flat cable 28 is loosened or bent repeatedly, signal transmission is not disabled due to disconnection. Conversely, based on the knowledge about the occurrence of disconnection, disconnection detection and warning using at least two wires. Can do.

FIG. 9A shows one disconnection detection circuit using two wires of one flat cable 28. Two first disconnection detection lines 28e near both edges 28d are connected by the relay control unit 22, and one first disconnection detection line 28e is connected to a pull-up power source via a resistor in the main body control unit 21. Then, the pull-up voltage V _D is applied and connected to the input port of the central control unit 20. The other first disconnection detection line 28 e is grounded in the main body control unit 21 and grounded by the relay control unit 22. Accordingly, when one of the disconnection detection circuits in FIG. 9A in which the two first disconnection detection lines 28e are connected in a loop shape is disconnected, the input port of the central control unit 20 is set to the L level during normal operation due to grounding. The H level signal is input by the action of the pull-up voltage V _D due to disconnection, and the disconnection warning lamp 6 such as an LED provided in the main unit 4 is turned on by the central control unit 20. .

Next, FIG. 9B shows two disconnection detection circuits using two wires of one flat cable 28. One end of each of the two first disconnection detection lines 28e near both edges 28d is grounded in the relay control unit 22. Further, the other end of the two first disconnection detection lines 28 e is applied with a pull-up voltage V _D in the main body control unit 21, and is connected to an input port of the central control unit 20. As a result, an L level signal is input to the input port of the central control unit 20 by grounding under normal conditions. However, when one of the two disconnection detection circuits in FIG. 9B is disconnected, the pull-up voltage V _An H level signal is input by _D , and the disconnection warning lamp 6 is turned on by the central control unit 20. Thereby, it becomes possible to determine which of the two is disconnected. Of course, when both are disconnected, both are lit.

10A, two flat cables 27 and 28 are connected to two unused wires near the edges 27d and 28d, connected by the camera board of the camera unit 11, and connected by the relay control unit 22. The flat cables 27 and 28 are connected to form one loop-shaped disconnection detection circuit. Therefore, when two disconnection detection lines 27e are connected and any one of the disconnection detection circuits in FIG. 9B connected to the two first disconnection detection lines 28e is disconnected, the central control is normally performed by grounding. An L level signal is input to the input port of the unit 20, but an H level signal is input by the action of the pull-up voltage V _D due to disconnection, and the disconnection warning lamp 6 is turned on by the central control unit 20.

FIG. 10B shows a case where two disconnection detection circuits are configured using two flat cables 27 and 28. The two disconnection detection lines 27e of the flat cable 27 are connected to the pull-up voltage V _D of the pull-up power source via a resistor and connected to the input port of the central control unit 20, and are further flattened via the relay control unit 22. The two disconnection detection lines 27e of the cable 27 are connected to each other and finally grounded by the camera board of the camera unit 11. As a result, an L level signal is input to the input port of the central control unit 20 during normal operation, but an H level signal is input when the line is disconnected. As a result, it can be determined which of the two is disconnected.

Subsequently, FIG. 11A shows a case where four disconnection detection circuits are configured using two flat cables 27 and 28. One end of each of the two first disconnection detection lines 28e of the flat cable 28 is grounded at the relay control unit 22, and the other end is applied with a pull-up voltage VD within the main body control unit 21, respectively. It is connected to the input port of the control unit 20. As a result, an L level signal is input to the input port of the central control unit 20 in a normal state. However, when the flat cable 28 is disconnected, an H level signal is input by the pull-up voltage V _D and the central control unit 20 disconnects. The warning light 6 is turned on.

Similarly, a pull-up voltage V _D is applied to each of the two adjacent second disconnection detection lines 28f inside the first disconnection detection line 28e and adjacent to the second disconnection detection line 28e. Connected to the input port of the unit 20. Further, the two second disconnection detection lines 28 f are connected to the two disconnection detection lines 27 e of the flat cable 27 via the relay control unit 22 and further grounded on the camera substrate of the camera unit 11. As a result, an L level signal is input to the input port of the central control unit 20 during normal operation, but an H level signal is input when the line is disconnected. Thereby, it is possible to immediately determine which of the four disconnection detection circuits is disconnected.

FIG. 11B shows another case in which four disconnection detection circuits are configured by using two flat cables 27 and 28. Reference numeral 30 denotes an OR circuit for calculating OR. One end of each of the two first disconnection detection lines 28e of the flat cable 28 is connected to the OR circuit 30 in the main body control unit 21, and the pull-up voltage V _D of the pull-up power supply is connected via a resistor. The other end is grounded in the relay control unit 22. Similarly, the other one is connected to the OR circuit 30 in the main body control unit 21 and connected to the pull-up voltage V _D of the pull-up power source via a resistor, and the other end is grounded in the relay control unit 22. Is done. The output of the OR circuit 30 is output to the input port of the central control unit 20 of the main body control unit 21. As a result, although the OR circuit 30 is used, an L level signal is input to the input port of the central control unit 20 in a normal state, but an H level signal is input when the line is disconnected.

  The two disconnection detection lines 27e of the flat cable 27 are each grounded in the camera unit 11, connected to the pull-up power source of the relay control unit 22, and connected to the OR circuit 29. The OR circuit 29 takes the OR of the two disconnection detection lines 27e, outputs the result to the second disconnection detection line 28f, and outputs it to the input port of the central control unit 20 of the main body control unit 21. Thus, although the OR circuit 29 is used, an L level signal is input to the input port of the central control unit 20 in a normal state, but an H level signal is input when the line is disconnected. Thereby, it becomes possible to immediately determine which of the four disconnection detection circuits is disconnected, and the disconnection warning lamp 6 is turned on by the central control unit 20.

Next, the case where the disconnection warning lamp 6 provided in the pan unit 3 on which the relay control unit 22 is mounted is turned on by the central control unit 20 will be described. In FIG. 12A, 31 is a logic circuit that calculates an OR by inverting one input, and 32 is a pair of LEDs Q ₁ and Q ₂ configured with the disconnection warning lamp 6 as one lamp. Based LEDQ ₁ is connected to PORT1, based LEDQ ₂ is connected to PORT2. LEDQ ₁ emits green light (first notification color of the present invention) when turned on, and LEDQ ₂ emits light red (second notification color of the present invention) when turned on. Accordingly, when both the LEDs Q ₁ and Q ₂ 32 are turned on, the disconnection warning lamp 6 emits orange light (third notification of the present invention). In addition, the display by the 3rd alert | report of this invention includes the case where it light-extinguishes demonstrated below besides the case where it light-emits this orange.

The base of the LEDQ ₁ is grounded, connected to the output port of the central control unit 20 via the first disconnection detection line 28e of the flat cable 28, and input to the inverting input terminal of the logic circuit 31. The base of the LED Q ₂ is connected to the pull-up voltage V _D through a resistor, and connected to the second output port of the central control unit 20 via the first disconnection detection line 28 e of the flat cable 28 and a logic circuit. 31 is input to the other input terminal. The output terminal of the logic circuit 31 is connected to the input port of the central control unit 20.

Therefore, the control of the normal central control unit 20, PORT1 the H level, by controlling the PORT2 to L level, LEDQ ₁ as shown in FIG. 12 (b) is ON, LEDQ ₂ is turned OFF. This means that the disconnection warning lamp 6 is lit in green. In this state, an L level signal is fed back to the input port of the central control unit 20 via the logic circuit 31.

In contrast, when the disconnection occurs, for example, when a disconnection detection line 27e on the side of the PORT1 is disconnected, PORT1 becomes L level, since PORT2 is also at the L level, LEDQ as shown in FIG. 12 (b) ₁ , Q ₂ 32 are turned off, and the disconnection warning light 6 is turned off. When the disconnection detection line 27e on the PORT2 side is disconnected, PORT2 is at H level, and PORT2 is also at H level. Therefore, as can be seen from the truth table of FIG. 12B, both LEDs Q ₁ and Q ₂ 32 are ON. And orange (mixed color of the present invention). When the disconnection warning light 6 is turned off or changes to orange, there is no problem in signal transmission of the flat cable 28, but this indicates that the disconnection detection line 27e is disconnected, and the signal line is disconnected. Will be warned. At this time, the output terminal of the logic circuit 31 is connected to the input port of the central control unit 20 at the H level signal.

When both disconnection detection lines 27e of PORT1 and PORT2 are disconnected, PORT1 becomes L level and PORT2 becomes H level. At this time, LEDQ ₁ is turned off and LEDQ ₂ is turned on. At this time, the disconnection warning lamp 6 is lit in red, and warns the occurrence of signal line disconnection at a high level. At this time, the output terminal of the logic circuit 31 is connected to the input port of the central control unit 20 at the H level signal.

  Next, based on Fig.13 (a), the disconnection detection circuit when lighting LED using the flat cable 28 of 1 sheet and the input / output port of the central control part 20 is demonstrated. In the disconnection detection circuit of FIG. 12A, one input port and two output ports of the central control unit 20 and the logic circuit 31 are used. In the case shown in FIG. 13A, the input / output of the central control unit 20 is used. It uses a port. In FIG. 13A, reference numerals 33 and 34 denote input / output ports of the central control unit 20 capable of both input and output using the same port.

One end of one of the two first disconnection detection lines 28e of the flat cable 28 is connected to the pull-up power source via the first resistor in the relay control unit 22, and the other end is controlled by the main body. The unit 21 is grounded via the second resistor. Furthermore the ends of the other is connected to the input and output ports 33 of the central control unit 20 in the main body control unit 21, the one end portion to LEDQ ₂ of the pair of LEDQ _1, Q ₂ 32 in the relay control unit 22 Connected. The other one of the two first disconnection detection lines 28e is connected to the side grounded via the first resistor in the relay control unit 22, and conversely the pull-up power source via the second resistor in the main body control unit 21. Further, this end is connected to the input / output port 34 of the central control unit 20 in the main body control unit 21, and the opposite end is connected to the LED Q ₁ in the relay control unit 22. The pair of LEDs Q ₁ and Q ₂ 32 has the same configuration as that shown in FIG. The second resistor is given a resistance value much greater than that of the first resistor, and the partial pressure of the first disconnection detection line 28e is set high because of the relationship between the second resistor and the first resistor.

  In the normal state, the two first disconnection detection lines 28e are set as output ports under the control of the central control unit 20, and output PORT1 at H level and PORT2 at L level, respectively. During normal operation, the disconnection warning lamp 6 is lit in green. In order to confirm whether or not these first disconnection detection lines 28e are disconnected, the central control unit 20 periodically, for example, every hour, the two first disconnection detection lines 28e are: The central control unit 20 switches to an input port, and the central control unit 20 reads the value of each port. Since the resistance value of the second resistor is much larger than that of the first resistor, PORT1 is read at the L level and PORT2 is read at the H level in the normal state.

In contrast, when the disconnection occurs, for example, when the first disconnection detection line 28e on the side of the PORT1 is disconnected, the base voltage of LEDQ ₁ becomes the L level. As shown in FIG. 13B, the LEDs Q ₁ and Q ₂ 32 are turned off, and the disconnection warning lamp 6 is turned off. At this time, the central control unit 20 switches the two first disconnection detection lines 28e to input ports periodically, for example, every hour, and reads PORT1 at H level and PORT2 at H level, respectively. Disconnection on the PORT1 side can be detected. Further, when the first disconnection detection line 28e on the side of the PORT2 is disconnected, the base voltage of LEDQ ₂ becomes H level, and LEDQ _1, Q ₂ 32 both ON As can be seen from the truth table shown in FIG. 13 (b) And orange (mixed color of the present invention). At this time, similarly, the central control unit 20 switches the two first disconnection detection lines 28e to input ports periodically, for example, every hour, and reads PORT1 at L level and PORT2 at L level, respectively. Thus, the disconnection on the PORT2 side can be detected. If the disconnection warning lamp 6 is not lit and becomes orange, a disconnection warning with a slight margin is given.

Even when the first disconnection detection line 28e of both PORT1,2 is disconnected, the base voltage of LEDQ ₁ and LEDQ ₂ is, L level, respectively, to the H level. As can be seen from the truth table of FIG. 13B, LED Q ₁ is turned OFF and LED Q ₂ is turned ON. At this time, the disconnection warning lamp 6 is lit in red, and warns the occurrence of signal line disconnection at a high level. The central control unit 20 switches the two first disconnection detection lines 28e to input ports periodically, for example, every hour, and reads both PORT1 and PORT2 by reading H level and PORT2 respectively. Can be detected.

  As described above, the cable disconnection detection device for the network camera according to the first embodiment of the present invention can increase the durability of the flat cable, suppress the possibility that the flat cable is disconnected, and signal transmission is interrupted even if the disconnection occurs. If there is a possibility that the signal line of the flat cable is disconnected, a warning can be issued.

  In addition, it is possible to notify which line of the flat cable is disconnected with a disconnection warning light, and it is also possible to notify the warning separately into a warning with sufficient margin and a warning with high urgency.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a cable break detection device that can increase the durability of a flat cable and can warn of a break, and a camera device and an electronic apparatus equipped with the cable break detection device.

1 is a system configuration diagram of a network camera according to a first embodiment of the present invention. 1 is a perspective view of an internal structure of a network camera according to a first embodiment of the present invention. 1 is a functional configuration diagram of a network camera according to a first embodiment of the present invention. Explanatory drawing before the cable holder attachment of the 1st flat cable in Example 1 of this invention The front view when the 1st flat cable in Example 1 of the present invention is attached to a cable holder. Assembly process diagram of first flat cable to cable holder in network camera of embodiment 1 of the present invention The front view when the 2nd flat cable in the network camera of Example 1 of this invention is attached to a cable holder. Assembly process diagram of the second flat cable to the cable holder in the network camera of Embodiment 1 of the present invention (A) The block diagram which makes the cable disconnection detection apparatus in the network camera of Example 1 of this invention one disconnection detection circuit by 2 wiring of one flat cable, (b) The network camera of Example 1 of this invention The block diagram which makes the cable disconnection detection apparatus in 2 into 2 disconnection detection circuits by 2 wiring of one flat cable, (c) The enlarged view of a disconnection detection line (A) The block diagram which makes the cable disconnection detection apparatus in the network camera of Example 1 of this invention one disconnection detection circuit by two flat cables and 2 wiring each, (b) Network of Example 1 of this invention Configuration diagram of cable disconnection detection device in camera with two flat cables and two disconnection detection circuits (A) 1st block diagram which makes the cable disconnection detection apparatus in the network camera of Example 1 of this invention four disconnection detection circuits with two flat cables, (b) Network camera of Example 1 of this invention 2 is a second configuration diagram in which the cable disconnection detection device in FIG. 1 is made up of four disconnection detection circuits with two flat cables. (A) Detailed configuration diagram of a disconnection detection circuit when the cable disconnection detection device in the network camera according to the first embodiment of the present invention is turned on using a single flat cable and a logic circuit, and (b) an explanatory diagram of the operation. (A) Detailed configuration diagram of two disconnection detection circuits when the cable disconnection detection device in the network camera of Embodiment 1 of the present invention is turned on using one flat cable and a CPU, (b) Illustration

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Network camera 2 Tilt unit 3 Pan unit 4 Main body unit 5 Imaging lens 6 Disconnection warning lamp 7 IP network 8 Communication terminal 11 Camera part 12 Imaging part 13 Video signal processing part 14 Image signal compression part 15 Communication part 16 Tilt motor control part 17 Tilt motor 18 Pan motor controller 19 Pan motor 20 Central controller (CPU)
DESCRIPTION OF SYMBOLS 21 Main body control part 22 Relay control part 23 Cable holder 23a Cable winding body 23b Core body 23c Outlet 23d Cover part 24 Cable holder 24a Cable winding body 24b Core body 24c Mounting plate 24d Cover part 25 Communication control part 25a Belt 26 Belt Car 26a Belt 27 Flat cable 27a End portion 27b Center portion 27c End portion 27d Edge 27e Disconnection detection line 28 Flat cable 28a End portion 28b Center portion 28c End portion 28d Edge 28e First disconnection detection line 28f Second disconnection detection line 30 OR circuit 31 logic circuit 32 LEDQ ₁ , Q ₂

Claims (7)

A plurality of wirings are arranged, and at least one of the first and second wirings along the edge arranged adjacent to both side edges is used as a disconnection detection line, and other wirings are used as signal lines, and the first substrate is used. A flat cable that connects between the first and second substrates, a pull-up power source that applies a pull-up voltage to the disconnection detection line, and a disconnection warning for the signal line when the disconnection detection line is disconnected. A cable disconnection detection apparatus comprising: a warning means that can be mounted; and a control unit that is mounted on at least one of the substrates and operates the warning means when the pull-up voltage is detected as an input signal. 2. The cable breakage detecting device according to claim 1, further comprising a cable holder for accommodating the flat cable with a play in the accommodation length in order to relay and hold the flat cable. When the warning means is disconnected from both the first light emitting means for emitting a first notification color for notifying that the first and second wirings are disconnected, and the first and second wirings are disconnected. And a second light emitting means for emitting a second notification color, and when the first or second disconnection detecting line is disconnected, the first or second light emitting means emits light or does not emit light. 3. The cable disconnection detecting device according to claim 1 or 2, wherein three notification colors are displayed. Another flat cable for connecting between the second board and the third board is provided, and another flat cable is provided with a disconnection detection line and a signal line, and the another flat cable is connected to the first board. The cable breakage detection device according to claim 1, wherein the cable breakage detection device is connected to the flat cable via two substrates. A camera apparatus comprising: a movable portion provided with a first substrate on which an imaging element is mounted; and a main body portion that mounts a second substrate and rotatably supports the movable portion. The first and second substrates are connected with a flat cable, the disconnection detection line and the signal line are provided on the flat cable, and the disconnection of the flat cable is detected. A camera device comprising a cable disconnection detection device according to any one of the above devices. The movable portion includes a tilt unit that mounts the first substrate and rotates in a tilt direction, and a pan unit that mounts a relay substrate and supports the tilt unit so as to be rotatable in the pan direction. ,
The first board and the relay board are connected by a first flat cable, and the relay board and the second board are connected by a second flat cable, and the first and second boards are connected. The cable breakage detection device according to any one of claims 1 to 3, wherein the flat cable is provided with a breakage detection line and a signal line, respectively, and is connected to each other to detect the breakage of the first and second flat cables. Is a camera device. An electronic apparatus comprising: a movable portion provided with a first substrate; and a main body portion that mounts a second substrate and rotatably supports the movable portion,
The first board and the second board are connected with a flat cable, the disconnection detection line and the signal line are provided on the flat cable, and the disconnection of the flat cable is detected. An electronic apparatus comprising the cable disconnection detection device described in any one of?

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