JP5910208B2 - Flexible cable, its abnormality detection device, its abnormality detection method, and electronic device. - Google Patents

Description

The present invention relates to a flexible cable having a cable abnormality detection function due to short-circuiting or disconnection of a conductive pattern, an abnormality detection device, an abnormality detection method, and an electronic device.

  Many electronic devices use cables that transmit power, signals, and the like. In such a cable, for example, a short circuit may occur due to foreign matter intrusion into the cable, aging, damage, etc., and the cable itself may generate abnormal heat. The heat generated by the cable has an effect on surrounding functional parts and a danger to users who use electronic devices.

  Regarding the abnormality detection of this cable, an abnormality detection insulator composed of a three-layer body in which two conductors are stacked on the upper and lower sides of the temperature resistor is wound around the main power line covered with the insulator, and the temperature change is caused. One that detects a resistance value is known (for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-223653

  By the way, in an electronic device such as a cellular phone or a notebook PC (Personal Computer) that connects a plurality of casings so that they can be opened and closed, a flexible flexible flat cable is used to connect functional components inside each casing. Yes. A flexible cable is arrange | positioned at the movable part between housing | casings using a softness | flexibility. For this reason, the flexible cable may cause a short circuit due to a change in position or storage state inside the housing, contact with other components, damage due to external force, and the like, and may cause abnormal heat generation.

  Some electronic devices including cables include a fuse or the like for a power supply line through which a large amount of current flows to provide protection means against overcurrent. However, as a countermeasure against abnormality using a fuse, for example, in a so-called half short-circuit state where the cable is not completely short-circuited, the generated overcurrent does not reach the breaking capacity and the fuse may not function effectively. In this case, inside the electronic device, there is a problem that abnormal heat generation continues around the cable for a long time, causing a problem in safety such as breakage of the casing due to heat.

  In addition, the electronic device can take measures such as providing a space portion between the cable and the housing to delay heat transfer against such abnormal heat generation due to such a half short circuit. However, there is a problem that the provision of such a space portion hinders downsizing and thinning of the electronic device.

Therefore, in the flexible cable, the abnormality detection device, the abnormality detection method, and the electronic device according to the present disclosure, in view of the above-described problems, it is desirable to quickly and reliably grasp the occurrence of abnormality due to heat generation or damage of the cable body.

In order to achieve the above object, in the configuration of the present disclosure, an insulating layer that insulates the conductive pattern is provided, and the heat sensitive body layer and the first and second electrode bodies are provided via the insulating layer. The heat sensitive layer is provided alongside the conductive pattern, and changes in resistance due to heat generation, contact abnormality or damage of the conductive pattern. The first electrode body is placed on the conductive pattern via an insulating layer, and is sandwiched between the heat sensitive body layers to take out a resistance change from the heat sensitive body. The second electrode body is disposed on the same layer as the first electrode body and the heat sensitive body layer, a part of which is disposed around the first electrode body with the heat sensitive body layer interposed therebetween, and the other part is an insulator layer. The change in resistance is taken out along the periphery of the.

  According to the flexible cable, the abnormality detection device, the abnormality detection method, and the electronic device of the present disclosure, any of the following effects can be obtained.

  (1) Since the state of the cable is directly monitored by the heat sensitive material applied to the flexible cable, the occurrence of an abnormality can be quickly grasped and the safety of the electronic device can be improved.

  (2) In addition, the heat sensitive layer and the electrode body that monitor the heat generation of the cable are applied to the same layer and integrated with the cable to maintain the flexibility of the cable and reduce the thickness of the electronic equipment on which the cable is mounted. Can be realized.

  (3) In an electronic device equipped with this flexible cable, an abnormal state is detected before the temperature rises due to the heat generated by the cable. Can do.

(4) By using a temperature sensing element with negative temperature characteristics and setting two thresholds for the detected voltage / current value, it is possible to distinguish between abnormal heating that requires an emergency stop and other abnormalities. Convenience can be improved by providing a width.

It is a figure which shows the structural example of the flexible cable which concerns on 1st Embodiment. It is a figure which shows an example of the II-II line cross section of FIG. It is a figure which shows the structural example of the abnormality detection sensor part arrange | positioned around the electroconductive pattern. It is a figure which shows the example of a state of abnormality generation in a flexible cable. It is a flowchart which shows an example of abnormality detection of a flexible cable. It is a figure which shows the function structural example of the abnormality detection apparatus which concerns on 2nd Embodiment. It is a figure which shows the circuit structural example of an abnormality detection apparatus. It is a figure which shows the structural example of a resistance-voltage conversion circuit. It is a figure which shows the circuit structural example of an abnormality detection sensor part. It is a figure which shows the relationship between the voltage V3 after conversion, and abnormality detection sensor part temperature. It is a figure which shows an example of a voltage comparison principle. It is a figure which shows an example of a voltage comparison principle. It is a flowchart which shows an example of the abnormality detection process of a flexible cable. It is a figure which shows the structural example of the electronic device which concerns on 3rd Embodiment. It is a figure which shows the hardware structural example of an electronic device. It is a figure which shows the external appearance structural example of a mobile telephone. It is a figure which shows the mounting state example of a flexible cable. It is a flowchart which shows an example of the abnormality detection process of a flexible cable. It is a flowchart which shows an example of abnormality detection execution control. It is a figure which shows the example of an external appearance structure of PC which concerns on other embodiment. It is a figure which shows the structural example of the electronic device which concerns on other embodiment. It is a figure which shows the structural example of the electronic device which concerns on other embodiment. It is a figure which shows the structural example of the electronic device which concerns on other embodiment.

  [First Embodiment]

  FIG. 1 shows a configuration example of a flexible cable according to the first embodiment. The configuration illustrated in FIG. 1 is an example, and the present invention is not limited to such a configuration.

  A flexible cable 2 illustrated in FIG. 1 is an example of a flexible cable according to the present disclosure, and includes an abnormality detection sensor unit 6 that detects heat generation or the like on part or all of the plane of the cable main body unit 4. The cable main body 4 is made of, for example, a flexible resin material, and one or a plurality of conductive patterns 8 are arranged along the longitudinal direction of the cable main body 4. The conductive pattern 8 supplies power and transmits signals to, for example, a board or functional component mounted on an electronic device. The abnormality detection sensor unit 6 detects an abnormal heat generation due to, for example, a contact failure or a half short, and also detects an abnormal state due to damage to the cable body unit 4.

  The abnormality detection sensor unit 6 is configured by disposing the insulating layer 10, the heat sensitive body 12, and the electrode bodies 14 and 16 on the plane of the cable body 4.

  The insulating layer 10 is laminated on the plane of the cable body 4, covers a part of the cable body 4, and insulates the heat sensitive body 12 and the electrode bodies 14 and 16 from the conductive pattern 8. The insulating layer 10 is formed of a film member made of an insulating material such as polyimide. For example, the insulating layer 10 is formed on the plane of the cable body 4 in accordance with the range in which abnormality detection is performed.

  The heat sensitive body 12 is an example of a heat generation detection unit for the conductive pattern 8. The heat sensitive body 12 is provided along the conductive pattern 8 via the insulating layer 10. The heat sensitive body 12 is made of, for example, a conductive polymer and has a characteristic that a temperature change is converted into an electrical resistance value. That is, the abnormality detection sensor unit 6 provided with the heat sensitive body 12 constitutes a thermistor thermometer. In addition, the conductive polymer has a characteristic that the resistance value changes due to damage, for example, as described later. The heat sensitive body 12 installed in the abnormality detection sensor unit 6 is composed of, for example, an NTC (Negative temperature coefficient) element having a negative temperature characteristic in which the resistance value decreases as the temperature of the detection target increases.

  The heat sensitive body 12 shown in FIG. 1 is disposed in contact with the side surface in the longitudinal direction with respect to the electrode body 14 disposed on the conductive pattern 8 via the insulating layer 10. At this time, the heat sensitive body 12 is not arranged on the conductive pattern 8, for example. Such an arrangement of the heat sensitive body 12 detects the temperature via the electrode body 14 without directly detecting the temperature on the conductive pattern 8 that has generated heat. Thereby, the thermal element 12 can avoid the detection of the whole temperature rise by energization of the conductive pattern 8, for example, can specify the position of the high temperature state due to abnormal heat generation, and can improve the detection accuracy. Further, the arrangement position of the heat sensitive body 12 may be set in consideration of the heat resistant temperature of the conductive polymer.

  The electrode bodies 14 and 16 are an example of a means for contacting the heat sensitive body 12 and extracting the resistance change. The electrode bodies 14 and 16 are made of, for example, a copper foil pattern, and form part of an electric circuit for abnormality detection with the heat sensitive body 12 that is in contact with a part or the whole. The electrode bodies 14 and 16 are respectively connected to an abnormality determination circuit 18 provided outside the flexible cable 2. And the electrode bodies 14 and 16 detect the electric current value and voltage value by the resistance value change between the heat sensitive bodies 12. FIG. The electrode bodies 14 and 16 are laminated on the insulating layer 10 and are disposed in the same layer as the heat sensitive body 12.

  The electrode body 14 is an example of a first electrode body, and is disposed on the conductive pattern 8, for example. For example, one end side of the electrode body 14 is disposed on the conductive pattern 8. The other end side is connected to the abnormality determination circuit 18 side. The first electrode body 14 is set, for example, to the width of the conductive pattern 8 in the short direction. Thereby, a temperature change due to heat generation of the conductive pattern 8 is transmitted to the heat sensitive layer 12 through the first electrode body 14. For example, both side surfaces in the longitudinal direction are surrounded by and contacted with the heat sensitive body 12, and heat is transmitted to the electrode body 14.

  The electrode body 16 is an example of a second heat sensitive body, and is formed in the same layer as the electrode body 14 and the heat sensitive body 12. The electrode body 16 is arranged so that one end side surrounds the periphery of the first electrode body 14 via the heat sensitive body 12 according to the installation position of the conductive pattern 8. The electrode body 16 is in electrical continuity in contact with the heat sensitive body 12. The other end of the electrode body 16 is connected to the abnormality determination circuit 18.

  As described above, the abnormality detection sensor unit 6 is generated in the cable body 4 by arranging the electrode bodies 14 and 16 in accordance with the conductive pattern 8 and sandwiching the heat sensitive body 12 between the electrode bodies 14 and 16. It is possible to detect abnormal heat generation by converting it into electrical characteristics.

  For example, the central portion of the electrode body 16 is disposed on the plane of the cable main body 4 set in the abnormality detection region via the insulating layer 10. The electrode body 16 is disposed, for example, so as to surround the electrode body 14 and the heat sensitive body 12 along the periphery of the insulating layer 10 from the connection point with the abnormality determination circuit 18. As described above, the electrode body 16 is arranged with the three sides of the electrode body 14 in contact with the heat sensitive body 12. As described above, the electrode body 16 is arranged so as to reduce the arrangement interval with the electrode body 14 and further to have a large contact area with the heat sensitive body 12, so that the resistance value due to the temperature change due to heat generation of the conductive pattern 8 can be reduced. Conversion efficiency is improved.

  In the abnormality detection sensor unit 6, for example, the length of the contact portion between the heat sensitive body 12 and the electrode bodies 14, 16 is adjusted in accordance with the range in which the user's hand contacts the exterior case of the electronic device on which the flexible cable 2 is mounted. It may be limited. Thus, by limiting the range in which the heat generation abnormality is detected, the detection speed of the abnormal temperature can be improved.

  The electrode body 16 is placed in the peripheral portion of the insulating layer 10 at the center portion, and is lost or disconnected with damage to the cable body 4, for example. Thereby, the circuit of the abnormality detection sensor unit 6 constituted by the heat sensitive body 12 and the electrode bodies 14 and 16 is brought into a state such as disconnection, and disconnection or damage of the cable body 4 is detected.

  The abnormality determination circuit 18 is connected to an abnormality detection circuit formed by the thermal body 12 and the electrode bodies 14 and 16, and takes in the resistance change of the thermal body 12 taken out by the electrode bodies 14 and 16, so that the abnormal state of the flexible cable 2 is detected. Is determined.

  In the flexible cable 2 shown in FIG. 2, the insulating layer 10, the heat sensitive body 12, and the electrode bodies 14 and 16 of the abnormality detection sensor unit 6 are laminated on the plane of the cable body 4. In the cable body 4, for example, an insulating layer 20, a conductive pattern layer 22, an insulating layer 24, and a radio wave shield layer 26 are formed from the lowermost layer side. The insulating layers 20 and 24 are made of polyimide, for example. Conductive pattern layer 22 has conductive pattern 8 formed of, for example, copper foil. The radio wave shield layer 26 is made of, for example, a silver paste member, and blocks disturbances to the conductive pattern 8.

  The abnormality detection sensor unit 6 is formed of a flexible material, and the thickness thereof is configured to be smaller than the thickness of the cable body unit 4. Thereby, the flexible cable 2 can maintain flexibility, and assemblability is secured when it is installed in an electronic device or the like.

  And this abnormality detection sensor part 6 is arrange | positioned through the insulating layer 10 as the circumference | surroundings of the conductive pattern 8 used as a heat generation source. As a result, the abnormality detection sensor unit 6 can detect a heat generation abnormality before the cable main body unit 4 is damaged or ignited by combustion.

  FIG. 3 shows a configuration example of the abnormality detection sensor unit arranged around the conductive pattern.

  As described above, the electrode body 14 is disposed in the vicinity immediately above the conductive pattern 8 and has a width W1 equal to or greater than that of the conductive pattern 8. The heat sensitive body 12 is configured with a width W 2, and both end sides thereof are in contact with the electrode body 14 and the electrode body 16.

  The electrode body 16 is configured with a width W3 that is equal to or smaller than the width W2 of the heat sensitive body 12, for example. The width W2 of the heat sensitive body 12 and the width W3 of the transmission case 16 are independent of each other and may be set to arbitrary widths. Further, the electrode body 16 shown in FIG. 3 is arranged with a space portion 30 having a length L1 between the electrode body 14 and the side surface portion on the short side. The space 30 prevents an electric circuit from being formed without the heat sensitive body 12 due to contact between the electrode bodies 14 and 16.

Alternatively, the heat sensitive body 12 may be disposed in the space 30 and the periphery of the heat sensitive body 12 may be brought into contact with the electrode bodies 14 and 16 and connected to the abnormality detection circuit.

  FIG. 4 shows an example of an abnormality occurrence state in the flexible cable. The abnormality occurrence state, occurrence location, and the like shown in FIG. 4 are examples, and the present invention is not limited to such a configuration.

(Detection of overheating)

  In the flexible cable 2 shown in FIG. 4A, for example, a half short occurs in the insulating layer 24 of the cable main body 4. In the cable main body 4, the conductor pattern layer 22 is heated around the occurrence of the half short, and propagates toward the entire cable main body 4. The abnormality detection sensor unit 6 detects a temperature change due to heating of the cable body 4 in the heat sensitive body 12. In the heat sensitive body 12, the resistance value decreases due to the detected temperature change. The electrode bodies 14 and 16 capture changes in the resistance value of the heat sensitive body 12. The abnormality determination circuit 18 converts the resistance value change taken in by the electrode bodies 14 and 16 into a current or voltage level, and determines a heat generation abnormality from the level change.

  In this flexible cable 2, the abnormality detection sensor unit 6 is arranged along the conductive pattern 8 in which a short circuit or the like may occur. The abnormality detection sensor unit 6 can detect a heat generation abnormality before the cable body unit 4 reaches a high temperature state. Thereby, in the electronic device in which the flexible cable 2 is installed, it is possible to prevent the heat of the cable main body portion 4 from propagating to the outer case 32 and the like, for example. Therefore, in the electronic device, the height H1 to the outer case 32 with respect to the flexible cable 2 can be reduced.

  (Damage abnormality detection)

  In the flexible cable 2 shown in FIG. 4B, the cable main body 4 is damaged by, for example, pressure from the outer case 32 of the electronic device. At this time, in the abnormality detection sensor unit 6, for example, contact failure or disconnection of the heat sensitive body 12 or disconnection of the electrode bodies 14, 16 occurs. Thereby, for example, the resistance value of the heat sensitive body 12 increases. The electrode bodies 14 and 16 capture changes in the resistance value of the heat sensitive body 12. Then, the abnormality determination circuit 18 converts the resistance value change taken in by the electrode bodies 14 and 16 into a current or voltage level, and determines a failure abnormality from the level change.

  The abnormality determination circuit 18 determines a heat generation abnormality or a breakage abnormality based on the detected increase or decrease in the resistance value based on the negative temperature characteristic of the heat sensitive body 12. Then, the abnormality determination circuit 18 may output a warning signal such as a warning display instruction or a power supply stop instruction to the mounted electronic device according to the determined abnormal state, for example.

  FIG. 5 shows an example of a flexible cable abnormality detection process. The processing contents and processing procedures shown in FIG. 5 are examples, and the present invention is not limited to such a configuration.

  This abnormality detection process is an example of the abnormality detection method for the flexible cable according to the present disclosure. In the electrode bodies 14 and 16, a change in the resistance value of the heat sensitive body 12 provided along with the conductive pattern 8 is monitored via the insulating layer 10 (S1). When the heat sensitive body 12 detects the generation of heat generation, contact abnormality, or breakage of the conductive pattern 8, the resistance value changes.

  The electrode bodies 14 and 16 output the monitoring result of the change in resistance value taken in from the heat sensitive body 12 to the abnormality determination circuit 18 (S2). The abnormality determination circuit 18 converts a resistance change into a current or voltage level, and determines a heat generation abnormality or a breakage abnormality of the electrode bodies 14 and 16 from the level change.

  According to such a configuration, since the state of the cable is directly monitored by the heat sensitive body applied to the flexible cable, the occurrence of an abnormality is quickly grasped, and the safety of the electronic device is improved. In addition, the heat sensitive layer and the electrode body that monitor the heat generation of the cable are applied to the same layer and integrated with the cable to maintain the flexibility of the cable and reduce the thickness of the electronic device on which the cable is mounted. It becomes. In an electronic device equipped with a flexible cable, an abnormal state is detected before heat is transmitted to the housing side and the temperature rises due to heat generated from the cable, so that the safety of the user can be improved.

  [Second Embodiment]

  FIG. 6 shows a functional configuration example of the abnormality detection apparatus according to the second embodiment. The configuration shown in FIG. 6 is an example, and the present invention is not limited to such a configuration.

  The abnormality detection device 40 illustrated in FIG. 6 is an example of the abnormality detection device for the flexible cable 2 according to the present disclosure. The abnormality detection device 40 includes an abnormality determination unit 46 together with, for example, a heat sensitive unit 42 and a resistance change detection unit 44 installed on the flexible cable 2. The heat sensitive unit 42 detects heat generation due to a half short-circuit generated in the cable main body 4 (FIG. 1) or damage of the cable main body 4 due to external force applied from the outside. The heat sensitive part 42 is composed of the heat sensitive body 12 including, for example, a conductive polymer. As described above, the heat sensitive body 12 has a characteristic that the resistance value changes due to detection of heat generation or damage to the heat sensitive body 12 itself.

  The resistance change detection unit 44 extracts a change in resistance value from the heat sensitive unit 42 that has detected heat generation or breakage, and outputs the change to the abnormality determination unit 46. This resistance change detection part 44 is comprised by the electrode bodies 14 and 16 which connect to the thermal body 12 and comprise the detection circuit of an abnormal state, for example. In the resistance change detection unit 44, for example, when the electrode bodies 14 and 16 are damaged or disconnected due to an external force applied to the cable body 4, the disconnection state is detected by the abnormality determination unit 46, and abnormality detection of the flexible cable 2 is performed. Is called.

  The heat-sensitive part 42 and the resistance change detection part 44 installed in the flexible cable 2 are configuration examples of the abnormality detection sensor part 6 described above.

  The abnormality determination unit 46 is connected to the abnormality detection sensor unit 6 to configure an example of an abnormality detection circuit. The abnormality determination unit 46 converts the resistance value of the heat sensitive unit 42 taken in from the resistance change detection unit 44 into a current or a voltage, and determines the change. In the abnormality determination, the negative temperature characteristic of the heat-sensitive part 42 due to heat generation is used, and for example, the occurrence of heat generation abnormality is determined by an increase or decrease in the converted current or voltage value. Further, in the breakage of the cable body part 4 or the abnormality detection by the heat-sensitive part 42, the characteristic that the resistance value of the abnormality detection sensor part 6 increases is utilized, for example, the occurrence of a breakage abnormality due to the increase or decrease of the converted current value or voltage value. Is determined.

  7, 8, and 9 show circuit configuration examples of the abnormality detection device.

  The abnormality detection device 40 includes, for example, an abnormality detection sensor unit 6 installed in the flexible cable 2 and an abnormality detection circuit 50. The abnormality detection sensor unit 6 is insulated from the power supply line 64 or the signal line 66 and is provided with the heat sensitive body 12 (FIG. 1) and the electrode bodies 14 and 16 (FIG. 1). The electrode bodies 14 and 16 are connected to the abnormality detection circuit 50, and the changed resistance value of the heat sensitive body 12 is added.

  The abnormality detection circuit 50 illustrated in FIG. 7 is an example of a unit that determines an abnormality that has occurred in the flexible cable 2 and constitutes the abnormality determination unit 46 described above. The abnormality detection circuit 50 includes, for example, a resistance-voltage conversion circuit 52, a voltage comparison circuit 54, and a control unit 60. The abnormality detection circuit 50 converts the resistance value taken from the abnormality detection sensor unit 6 into a determination voltage, and determines the abnormal state of the flexible cable 2 from the determination voltage value. The determination result by the abnormality detection circuit 50 is taken into the control unit 60, for example. Then, the control unit 60 determines whether to stop power supply or signal transmission using the flexible cable 2 based on the determination result, and controls the power supply unit 62 and the like.

  The resistance-voltage conversion circuit 52 is an example of a voltage value conversion unit corresponding to the resistance value Rth of the heat sensitive body 12 (FIG. 1) of the abnormality detection sensor unit 6. The resistance-voltage conversion circuit 52 converts the resistance change taken out by the electrode bodies 14 and 16 (FIG. 1) into a current or voltage level. In the resistance-voltage conversion circuit 52, for example, as shown in FIG. 8, a pull-up resistor 70 is connected in series to the resistance value Rth of the heat sensitive body 12, and a reference voltage Vcc is applied. In the resistance-voltage conversion circuit 52, the reference voltage Vcc is divided by the resistance value Rth and the pull-up resistor 70, and the converted voltage V3 is output.

  In the abnormality detection sensor unit 6 shown in FIG. 9, the thermistor resistance Rth is formed by the electrode bodies 14 and 16 and the heat sensitive body 12 along the conductive pattern 8 arranged in the flexible cable 2. For this resistance Rth, a plurality of resistors R1 to R6,... Are formed between the electrode body 16 and the heat sensitive bodies 12 connected to the left and right ends of the electrode body 14, for example. These resistors R <b> 1 to R <b> 6... Are connected in parallel toward the distal end side of the electrode body 16, for example. Therefore, the resistor Rth is a combined resistor of the resistors R1 to R6.

At this time, the resistance Rth formed between A and B of the electrode bodies 14 and 16 is calculated as follows from, for example, a combined calculation formula of resistances connected in parallel.

  In such a configuration, for example, when a short circuit occurs in the flexible cable 2 and a part of the resistance value of the heat sensitive body 12 is reduced due to heat generation, a part of R in the above formula (1) is reduced. Since each of the resistors R1 to R6 is an inverse number in the equation (1), when any or all of the resistance values R1 to R6 are decreased, the value of the denominator of the equation (1) is increased, and Rth The value of is smaller than the normal state.

式（２）において、フレキシブルケーブル２が正常状態の場合に対して抵抗値Ｒｔｈが小さくなると、変換後電圧Ｖ３の値も小さくなる。 Then, when the resistance value Rth synthesized in the resistance-voltage conversion circuit 52 shown in FIG. 8 is reflected, the value of the converted voltage V3 is calculated from, for example, a partial pressure calculation formula.

In the equation (2), when the resistance value Rth becomes smaller than that in the case where the flexible cable 2 is in a normal state, the value of the converted voltage V3 also becomes smaller.

  Further, for example, when the heat sensitive body 12 is damaged or broken by an external force applied to the flexible cable 2, any or all of the resistance values R1 to R6 of the heat sensitive body 12 are increased. Thereby, the value of Rth becomes a large value by the calculation based on the formula (1). The converted voltage V3 calculated based on the calculated resistance value Rth is also a large value with respect to the normal value.

  Further, when the electrode bodies 14 and 16 of the abnormality detection sensor unit 6 are disconnected, the circuit in the abnormality detection sensor unit 6 is opened, and the circuit is connected between the abnormality detection sensor unit 6 and the resistance-voltage conversion circuit 52. Not configured. Thereby, for example, the reference voltage Vcc is applied to the voltage comparison circuit 54.

  FIG. 10 shows an example of the relationship between the converted voltage V3 and the temperature of the abnormality detection sensor unit. The experimental values and experimental results shown in FIG. 10 are examples, and the present invention is not limited to such a configuration.

  In the detection result shown in FIG. 10, the relationship between the temperature of the detection unit and the resistance value Rth of the thermistor is calculated by the following expression that is a general approximate expression of the resistance value Rth.

式（３）において、Ｒ０はサーミスタに設定される基準抵抗値であり、Ｔ０は基準温度、Ｂはサーミスタ定数を示している。この式（３）で算出された抵抗値Ｒｔｈに対し、既述の式（２）を利用して変換後電圧Ｖ３を算出する。その結果、図１０に示すように、感熱体１２側を示すサーミスタの温度が低温のＴ１のときの電圧値Ｖ（Ｔ１）に対し、温度がＴ２またはＴ３に上昇すると、変換後電圧Ｖ３は、Ｖ（Ｔ２）またはＶ（Ｔ３）と小さくなる。

In Expression (3), R0 is a reference resistance value set for the thermistor, T0 is a reference temperature, and B is a thermistor constant. The converted voltage V3 is calculated using the above-described equation (2) with respect to the resistance value Rth calculated by the equation (3). As a result, as shown in FIG. 10, when the temperature rises to T2 or T3 with respect to the voltage value V (T1) when the temperature of the thermistor indicating the heat sensitive body 12 side is low T1, the converted voltage V3 is It becomes smaller as V (T2) or V (T3).

  At this time, as the temperature rises, the resistance value calculated by the above equation (3) becomes a small value.

  The voltage comparison circuit 54 shown in FIG. 7 performs a comparison process with the comparison voltage set for the converted voltage V3, and determines an abnormal state occurring in the flexible cable 2. The voltage comparison circuit 54 is provided with, for example, a regulator 80 for setting the reference voltage Vcc to a predetermined voltage, a first comparator 82 for detecting a heat generation abnormality, and a second comparator 84 for detecting a breakage abnormality. In addition, a pull-up circuit 86 is connected to the voltage comparison circuit 54.

  In this voltage comparison circuit 54, two threshold values are set and compared with the converted voltage V3 obtained from the resistance value detected by the abnormality detection sensor unit 6, and an abnormal state is determined.

  The regulator 80 is an example of a control unit that holds the applied reference voltage Vcc at a constant voltage value. In this regulator 80, for example, the comparison voltage V1a is set as an upper limit threshold value and is input to the non-inverting input (+) side of the second comparator 84. For example, the regulator 80 is set with the comparison voltage V2a as a lower limit threshold, and is input to the inverting input (−) side of the first comparator 82. For the threshold values V1a and V2a, for example, an upper limit value or a lower limit value of the change may be set on the basis of the value of the converted voltage V3 when the flexible cable 2 is in a normal state.

  The first comparator 82 is an example of a unit that generates a determination output indicating a heat generation abnormality when the converted voltage V3 is lowered or increased below the threshold value V2a that is the first reference level. In the first comparator 82, the converted voltage V3 is input to the non-inverting input (+) side and compared with the lower limit threshold voltage V2a input to the inverting input side. The comparator 82 outputs Hi (H) when the input converted voltage V3 is higher than the threshold value V2a, and outputs Low (L) when it is lower.

  The second comparator 84 is an example of a unit that generates a determination output that indicates an electrode body breakage abnormality when the converted voltage V3 falls or rises below the threshold value V1a that is the second reference level. The second comparator 84 compares the converted voltage V3 with the upper limit threshold voltage V1a input to the inverting input (−) side and input to the non-inverting input side. The comparator 84 outputs Hi (H) when the input converted voltage V3 is lower than the threshold value V1a, and outputs Low (L) when it is higher.

  The pull-up circuit 86 is applied with a reference voltage Vcc via a resistor connected in series to each of the comparators 82 and 84. When the comparison result is Low, the pull-up circuit 86 is switched from the abnormality detection circuit 50 to Hi by the reference voltage Vcc. Is output.

  11 and 12 show an example of the principle of abnormality detection by voltage comparison.

  In this abnormality detection device 40, it is determined whether the abnormality is due to heat generation or abnormality due to breakage by setting the heat sensitive body 12 having negative temperature characteristics and the two threshold values V1a and V2a. When the upper limit or lower limit of the voltage value is exceeded, each result is output to the control unit 60 side. By using the negative temperature characteristic heat sensitive body 12 in this way, the converted voltage V3 decreases in the detection of abnormal temperature, and the detected voltage V3 increases in the detection of breakage abnormality, thereby clearly distinguishing the abnormal state. Can be done. Since the setting range between the upper limit value and the lower limit value of the converted voltage V3 can be increased, the range of handling determination for an abnormal state is increased.

  <Comparison processing within normal range>

  When the flexible cable 2 is within a usable normal range, the converted voltage V3 is set to be smaller than the upper limit threshold V2a and larger than the lower limit threshold V1a. As shown in FIG. 11A, the voltage comparison circuit 54 monitors the normal region where the cable can be safely used within the upper and lower thresholds for the converted voltage V3 that changes depending on the state of the flexible cable 2. Yes. At this time, in the first comparator 82 on the heat generation detection side, since the converted voltage V3 on the non-inverting input side is larger than V2a on the inverting input side, “H” is output in the comparison output V2 shown in FIG. 11B. Further, in the second comparator 84 on the break detection side, the threshold V1a on the non-inverting input side is larger than the converted voltage V3 on the inverting output side, so that “H” is output in the comparison output V1 shown in FIG. 11B. .

  <Comparison process in case of abnormal heat generation>

  When the flexible cable 2 generates heat due to a half short circuit or the like, the resistance value of the heat sensitive body 12 decreases as the temperature rises as described above. Due to this decrease in resistance value, the value of the converted voltage V3 also decreases. For example, when the cable becomes equal to or higher than the regulation temperature, the converted voltage V3 becomes smaller than the lower limit threshold V2a. At this time, as shown in FIG. 11B, “L” is output as the heat generation detection output V2. Further, the disconnection detection output V1 is in the “H” state. In the first comparator 82, the comparison output V2 changes to “L” when the converted voltage V3 on the non-inverting input side becomes smaller than the threshold value V2a on the inverting input side. In the second comparator 84, no change occurs even if V3 on the non-inversion side becomes small.

  <Comparison process in case of disconnection abnormality>

  When the flexible cable 2 is damaged and, for example, the heat sensitive body 12 is broken or damaged, or the electrode bodies 14 and 16 are broken, the value of the converted voltage V3 is increased as described above. Then, it is monitored whether or not the converted voltage V3 exceeds the upper limit threshold value V1a. When the converted voltage V3 exceeds the upper limit threshold value V1a, the disconnection detection output V1 becomes “L”. At this time, in the second comparator 84, when the converted voltage V3 on the inverting input side becomes larger than the threshold value V1a on the non-inverting input side, the disconnection detection output V1 shown in FIG. 11B changes from “H” to “L”. To do. In the first comparator 82, V3 on the non-inverting input side becomes large, so that the comparison result does not change.

  The comparators 82 and 84 output the comparison result 72 shown in FIG. 11C according to the value of the converted voltage V3 input according to the state of the cable.

  When the comparison result shown in FIG. 12A is output from each of the comparators 82 and 84, the reference voltage Vcc of the pull-up circuit 86 acts on the output. As shown in FIG. 12B, when the comparison result outputs V1 and V2 are “H”, for example, the reference voltage Vcc is applied from the pull-up circuit 86 to the GND side of the comparators 82 and 84 and is inverted to “L” and output. Is done. When the comparison result outputs V1 and V2 are “L”, the reference voltage Vcc of the pull-up circuit 86 is output, and the comparison output is inverted to “H”.

  As shown in FIG. 12B, the comparison outputs V1 and V2 of the comparators 82 and 84 are inverted by the pull-up circuit 86, so that the detection outputs V1b and V2b output “H” when an abnormal state is detected. To do. That is, the first comparator 82 that compares the threshold values of the heat generation abnormality outputs the comparison output V2b of “H” when heat generation is detected from the normal state. The second comparator 84 that compares the threshold values for disconnection detection outputs a comparison output V1b of “H” when disconnection is detected.

  In the abnormality detection circuit 50, the comparison inversion result 74 shown in FIG. Based on the comparison inversion result 74, the abnormality detection circuit 50 can output “H” only when the flexible cable 2 is in an abnormal state.

  The control unit 60 is an example of a control unit for the abnormality detection device 40 of the flexible cable 2 or an electronic device including the flexible cable 2. The control unit 60 is constituted by a computer, for example. The control unit 60 is connected to, for example, the power supply unit 62 and performs output control of the reference voltage Vcc applied to the abnormality detection circuit 50. In addition, the control unit 60 takes in the comparison result outputs V1b and V2b of the abnormality detection circuit, stops energizing the power supply line 64 and the signal line 66 based on the determined abnormal state, and notifies other users of electronic devices of warnings. Perform processing.

  FIG. 13 shows an example of an abnormality detection process for a flexible cable. The processing content, processing procedure, and the like shown in FIG. 13 are examples, and the present invention is not limited to such a configuration.

  This abnormality detection process is an example of the flexible cable abnormality detection method or abnormality detection program of the present disclosure. In the abnormality detection process, the resistance value of the heat sensitive body 12 of the abnormality detection sensor unit 6 is taken into the resistance-voltage conversion circuit 52 and converted into the converted voltage V3 (S11). In this resistance-voltage conversion process, the reference voltage Vcc is applied. At this time, if an abnormality occurs in the flexible cable 2, the resistance value of the heat sensitive body 12 changes, and the value of the converted voltage V3 is determined accordingly.

  The converted voltage V3 is output to the two comparators 82 and 84 on the voltage comparison circuit 54 side (S12). In the comparators 82 and 84, the converted voltage V3 is input to the non-inverting input side or the inverting input side, respectively, and an upper limit or lower limit threshold is set. The voltage comparison circuit 54 compares the converted voltage V3 with the threshold values V1a and V2a set in the comparators 82 and 84 (S13).

  In the voltage comparison circuit 54, the converted voltage V3 is compared with a threshold value, and it is determined whether heat generation or disconnection is detected based on the comparison result (S14). Then, the abnormality detection circuit 50 notifies the discrimination results of the two systems corresponding to the two set thresholds, for example, to the control unit 60 (S15).

  In this embodiment, the resistance value change generated in the heat sensitive body 12 is converted into a voltage and a comparison process is performed. However, the present invention is not limited to this. For example, an abnormality detection may be performed by converting into a current value.

  According to such a configuration, by using a negative temperature characteristic heat sensitive body and setting two threshold values for the voltage / current value converted from the resistance value, a heat generation abnormality that requires an emergency stop and other abnormality And the corresponding means can be widened, and convenience is enhanced.

  [Third Embodiment]

  FIG. 14 shows a configuration example of an electronic device according to the third embodiment. 14, the same components as those in FIGS. 1 and 7 are denoted by the same reference numerals, and description thereof is omitted.

  An electronic device 81 illustrated in FIG. 14 is an example of the electronic device according to the present disclosure, and the flexible cable 2 in which the abnormality detection sensor unit 6 is installed is mounted, and an abnormality detection circuit 50 that is an abnormality detection unit of the flexible cable 2 is provided. is set up. In the cable body 4, for example, a heat sensitive body 12 and electrode bodies 14, 16 are installed via an insulating layer 10 with respect to a conductive pattern 8 of a power supply line that connects substrates of an electronic device 81.

  In the abnormality detection circuit 50, an abnormality is detected by a comparison process between the converted voltage V3 set based on the resistance value of the heat sensitive body 12 captured by the electrode bodies 14 and 16, and the threshold value V2a indicating heat generation abnormality and the threshold value V1a indicating disconnection abnormality. A determination is made.

  In the electronic device 81, power control or notification processing is performed based on the abnormal state of the flexible cable 2 determined by the abnormality detection circuit 50. The electronic device 81 includes, for example, a system control circuit 83, a power supply 85, a power cut-off circuit 87, and a display warning display unit 88.

  The system control circuit 83 constitutes operation control means of the electronic device 81. In this system control circuit 83, for example, the status information of the flexible cable 2 is fetched from the abnormality detection circuit 50, and it is determined whether or not the system power is to be shut down when a disconnection abnormality or a heat generation abnormality occurs, a warning notification instruction, etc. Is done. In addition, the system control circuit 83 also controls application of the reference voltage Vcc of the abnormality detection circuit 50 and the like.

  The power supply 85 is a power supply unit of the electronic device 81 and is an example of the power supply unit 62 of the abnormality detection device 40.

  The power cut-off circuit 87 is an example of means for cutting off power supply or signal output to the conductive pattern 8 in accordance with an abnormal state of the flexible cable 2, and is configured by a switch circuit, for example. When the power cut-off circuit 87 takes in the detection signal of the lower limit threshold value V2a for the heat generation abnormality from the abnormality detection circuit 50, for example, the power supply 85 cuts off the energization to the conductive pattern 8.

  The display warning display unit 88 is an example of means for notifying the user of the electronic device 81 of the occurrence of an abnormal state of the flexible cable 2 by the abnormality detection circuit 50. The display warning display unit 88 notifies an abnormal state by, for example, display on the display screen of the electronic device 81, emission of a warning display light, or sound.

  In the electronic device 81, for example, a power-off process and a warning notification are performed for occurrence of a heat generation abnormality, and only a warning notification is performed for a disconnection abnormality. This is because the installation position of the flexible cable 2 in the electronic device 81 is close to the portion where the user's hand or the like such as the hinge portion comes into contact, and therefore the power is cut off in the case of abnormal heat generation to ensure safety. Then, the abnormal heat generated in the half-short stage can be terminated by shutting off the power supply. The disconnection abnormality when the threshold value V1a is exceeded is a case where a mechanical failure such as a cable contact failure or a cable breakage occurs, and the user is not immediately in danger. Therefore, only a warning is displayed as a minimum process, and a countermeasure for a malfunction due to damage is promoted.

  FIG. 15 illustrates a hardware configuration example of the electronic device.

  The electronic device 81 includes, for example, the above-described system control circuit 83 and power supply 85 power supply cutoff circuit 87, a regulator 90, a power supply control IC 92, a timer standby detection 94, a memory 104, an LCD unit 105, and the like.

  The system control unit 83 is configured by, for example, an LSI (Large Scale Integration), and includes a system CPU (System CPU: Central Processing Unit) 100 and a baseband CPU (Base Band CPU) 102. The system CPU 100 is an example of a unit that performs an operation control on each functional unit of the electronic device 81 by calculating and executing an OS (Operating System) and other programs. The system CPU includes, for example, a software program 112 that has been fetched and processed, an I / F (Inter Face) 116 that exchanges information and control instructions with the LCD control unit 114 and other functional units. .

  The baseband CPU 102 is a processor that performs wireless communication control of the electronic device 81.

  The memory 104 includes an MCP (Multi Chip Package) made of, for example, an LSI. The memory 104 includes, for example, a RAM (Random Access Memory) that is a work area of the program and a ROM (Read Only Memory) that stores a program such as an OS, an application, or data.

  The system CPU 100 exchanges programs with the memory 104.

  Regulator 90 is connected to power supply 85 and controls, for example, output of reference voltage Vcc to abnormality detection circuit 50. In the regulator 90, for example, ON / OFF switching control is performed, and when the standby state of the electronic device has passed for a certain period of time, control such as turning off the power supply to the abnormality detection circuit 50 is performed.

  The power supply control IC 92 is an example of a control unit for the power supply 85, and controls power supply in response to a control instruction from the system control circuit 83. The power supply control IC 92 receives an instruction from the system control circuit 83, for example, when an abnormality in heat generation is detected, and switches the power cut-off circuit 87.

  The timer standby detection 94 is an example of a unit that monitors the operating state of the electronic device 81. The timer standby detection 94 is connected to the system control circuit 83 and monitors whether the electronic device 81 is in use or being charged, and measures a predetermined time. The timer standby detection 94 is connected to the regulator 90 and outputs status information indicating whether the electronic device 81 is in use, for example. Thereby, for example, the abnormality detection device 50 interrupts the abnormality detection process.

  The LCD unit 105 is an example of a display unit of the electronic device 81 and functions as a display warning display unit 88, for example. The LCD unit 105 includes, for example, a driver 106 that is a display program and an LCD (Liquid Crystal Display) 108. The driver 106 is connected to the LCD control unit 114 of the system control circuit 83, and receives a warning display and other display instructions.

  In addition, the electronic device 81 includes a control receiver other than the LCD, an external speaker, an illumination display, and the like as other notification means 110.

  FIG. 16 shows an example of the external configuration of an electronic device, and FIG. 17 shows an example of the mounting state of the flexible cable.

  A cellular phone 120 illustrated in FIG. 16 is an example of the electronic device 81. The mobile phone 120 is connected to be openable and closable by, for example, a movable casing 122, a fixed casing 124, and a hinge 126. The movable housing 122 is provided with an LCD display 108. For example, a keyboard 132, a selection key 134, a determination key 136, and the like are arranged as the operation unit 130 in the fixed-side casing unit 124.

  For example, a part of the flexible cable 2 is wound around the hinge portion 126 of the mobile phone 120. And the abnormality detection sensor part 6 is arrange | positioned at the cable main-body part 4 according to the arrangement position to the hinge part 126, for example. For example, the abnormality detection sensor unit 6 may be set to have a length according to a range in which the user's skin touches the exterior case of the hinge unit 126. In addition, the abnormal temperature can be quickly detected by shortening the length of the abnormality detection sensor unit 6. Therefore, the manufacturing process of the flexible cable 2 and the assembly process of the electronic device 2 are performed in consideration of such conditions, so that the detection accuracy of abnormal heat generation can be increased and the safety of the electronic device 81 can be improved.

  FIG. 18 shows an example of an abnormality detection process for a flexible cable in an electronic device. The processing content and processing procedure shown in FIG. 18 are examples, and the present invention is not limited to such a configuration.

  The abnormality detection process illustrated in FIG. 18 is an example of the abnormality detection method and abnormality detection program of the present disclosure. In this abnormality detection process, the function stop or warning display of the electronic device 81 is selected according to the determination result by the abnormality detection circuit 50 to ensure the safety of the user.

  When abnormal heat generation has occurred in response to the occurrence of a cable defect (YES in S21), the abnormality detection circuit 50 switches the determination result V2b based on the lower limit threshold value from “L” to “H” and outputs it (S22). ). Based on the determination result, the power shutoff circuit 87 shuts off the regulator output or maintains the shutoff state (S23). As a result, power or signal output causing heat generation is cut off from the conductive pattern 8 of the flexible cable 2.

  By maintaining this blocked state, the abnormal heat generation of the flexible cable 2 ends (S24). At this time, activation of the electronic device 81 is prohibited, and the display on the LCD remains dark (S25). That is, when abnormal heat generation occurs, abnormal heat generation may occur again when the power is turned on again. Therefore, if the repair process is not performed, the power supply is shut off by a control instruction from the system control circuit 83, for example. The activation of the electronic device 81 is prohibited.

  In addition, in the case of an abnormality other than abnormal heat generation (NO in S21), cable disconnection or poor connection (S31), in the abnormality detection circuit 50, the determination result V1b based on the upper limit threshold is switched from “L” to “H”. Is output (S32).

  In the system control circuit 83, a signal is input from the abnormality detection circuit 50 to the I / F 116 of the system CPU 100 (S33). The system control circuit 83 preferentially starts interrupt processing for cable abnormality (S34). The system CPU 100 reads out a built-in abnormality processing program from the memory 104, for example, and generates and displays a warning message (S35). By executing the abnormality processing program, for example, a message such as “An error has occurred, please check at a nearby shop.” Is generated. The generated message is output and saved in the abnormality log of the memory 104 (S36).

  In the system control circuit 83, for example, by executing an abnormality control program, the generated abnormality message is transmitted by the LCD control unit 114 (S37). The transmitted abnormal message is received by the driver 106 of the LCD unit 105 (S38). Then, the driver 106 displays a warning message on the display 108 (S39).

  Next, FIG. 19 shows an example of abnormality detection execution control by the electronic device.

  This abnormality detection execution control is an example of the abnormality detection control method or abnormality detection control program of the present disclosure. This control process includes control of the execution timing of the abnormality detection process by the abnormality detection circuit 50. The abnormality detection process may be performed by detecting that a heat generation abnormality occurs while the electronic device 81 is being used by the user. Therefore, when the electronic device 81 has not been used for a long time, the abnormality detection process is stopped.

  When the abnormality detection of the flexible cable 2 is executed (S41), it is determined whether or not the electronic device 81 is in a standby state (S42). In this process, monitoring is performed by the timer standby detection 94 to determine whether or not the electronic device 81 is being used. If the electronic device 81 is in use (NO in S42), the abnormality detection is continued.

  If the electronic device 81 is in a standby state (YES in S42), it is determined whether a predetermined time has elapsed (S43). When a predetermined time elapses in the standby state (YES in S43), it is determined whether or not the electronic device 81 is being charged (S44). This determination is performed by the power supply control IC 92, for example. When the electronic device 81 is not being charged (NO in S44), the abnormality detection is interrupted (S45).

  When the electronic device 81 is being charged, power is supplied to the conductive pattern 8 of the flexible cable 2. Therefore, even when the user is not using the electronic device 81, abnormality detection is performed when charging is in progress. Further, even when abnormal heat is generated in the flexible cable 2, if the electronic device 81 is not used, there is little danger to the user. Then, when the use of the electronic device 81 is resumed, abnormality detection is performed and a heat generation abnormality can be detected, so that safety is ensured.

  According to such a configuration, when the flexible cable is in an abnormal heat generation state, by restarting the electronic device, it is possible to avoid the occurrence of a half short of the conductive pattern and to ensure the safety of the user. In addition, by distinguishing between heat generation abnormalities and disconnection of electrode bodies and cables, it is possible to restart electronic devices in the case of abnormalities that do not involve danger due to heat generation, and to ensure the minimum use. The convenience of the equipment can be secured. Furthermore, when the user is not using the electronic device, power consumption can be reduced by stopping the abnormality detection process.

  [Other Embodiments]

  (1) In the above embodiment, the configuration of the mobile phone 120 is shown as an example of the electronic device 81, but the present invention is not limited to this. The electronic device 81 may be configured to be foldable with a plurality of housings, for example, and may be used for the PC 200 shown in FIG. In the PC 200, for example, a display-side housing unit 202 and an operation-side housing unit 204 are connected by a hinge unit 206 so as to be opened and closed. In this PC 200, for example, the flexible cable 2 described above is installed inside the hinge portion 206, and it may detect a heat generation abnormality or a cable disconnection abnormality.

  In addition, the electronic device 81 may be used for an information communication terminal (PDA: Personal Digital Assistant) or a game machine.

  (2) In the above embodiment, the electrode body 16 is arranged at the peripheral portion of the flexible cable 2 to provide the function of detecting disconnection and breakage of the flexible cable 2, but the present invention is not limited to this. For example, the electronic device 220 shown in FIG. 21 uses the flexible cable 2 to which the abnormality detection sensor unit 222 in which the thermal body 12 and the electrode bodies 14 and 16 are arranged along the conductive pattern 8 through the insulating layer 10 is applied. May be. According to such a configuration, it is possible to reliably monitor abnormal heat generation as a minimum function related to user safety. In addition, when a large external pressure or the like is applied, it is possible to detect a breakage abnormality of the electrode bodies 14 and 16 and the heat sensitive body 12.

  (3) Further, in the electronic device 230 shown in FIG. 22, for example, the electrode body 234 is disposed on the main body portion 4 of the flexible cable 2, and the heat sensitive body 236 is disposed by being branched with respect to the conductive pattern 8 via the insulating layer 10. 238, 240 may be connected to form the abnormality detection sensor unit 232. According to such a configuration, since only the insulating layer 10 and the heat sensitive body 12 are applied on the conventional cable body 4, the flexibility of the flexible cable 2 can be further ensured.

  (4) Also, in the electronic device 250 shown in FIG. 23, for example, a part of the heat sensitive bodies 254, 256 is connected and applied to the insulating layer 10 disposed on the flexible cable 2 to form the abnormality detection sensor unit 252. May be. The heat sensitive body 254 is applied over a wide area on the conductive pattern 8 via, for example, the insulating layer 10. Moreover, the heat sensitive body 254 is arrange | positioned at the edge side of the cable main-body part 4, for example. And then. Electrode bodies are respectively installed on the heat sensitive bodies 254 and 256 and connected to the abnormality detection circuit 50.

  According to such a configuration, the flexibility of the cable can be maintained without installing a metal electrode body on the cable body 4. Moreover, since the heat sensitive bodies 254 and 256 are arranged in a wide range of the cable main body portion 4, it is possible to detect heat generation abnormality and disconnection abnormality.

Next, the following additional notes will be disclosed with respect to the embodiment including the above-described examples. The present invention is not limited to the following supplementary notes.

(Appendix 1) an insulating layer for insulating the conductive pattern;
A heat sensitive layer that is provided alongside the conductive pattern via the insulating layer and causes a resistance change due to heat generation, contact abnormality or breakage of the conductive pattern;
An electrode body for extracting the resistance change;
Flexible cable with

(Appendix 2) The electrode body is installed on the conductive pattern via the insulating layer, and the thermosensitive body layer is installed on both sides of the electrode body on the same layer as the electrode body.
The flexible cable according to Appendix 1.

(Appendix 3) The electrode body is
A first electrode body disposed on the conductive pattern via the insulating layer and sandwiched between the heat sensitive layers;
On the same layer as the first electrode body and the heat sensitive body layer, a part thereof is disposed around the first electrode body with the heat sensitive body layer sandwiched therebetween, and the other part is a peripheral edge of the insulator layer. A second electrode body arranged along
Comprising
The flexible cable according to Supplementary Note 1 or Supplementary Note 2.

(Appendix 4) The first electrode body installed on the conductive pattern via the insulating layer has the same pattern width as the conductive pattern.
The flexible cable according to Appendix 3.

(Additional remark 5) The said heat sensitive body layer was comprised with the conductive polymer which has a negative temperature characteristic in which resistance value falls by the heat_generation | fever of the said conductive pattern,
The flexible cable according to any one of appendix 1 to appendix 4.

(Appendix 6) an insulating layer for insulating the conductive pattern;
A heat sensitive layer that is provided alongside the conductive pattern via the insulating layer and causes a resistance change due to heat generation, contact abnormality or breakage of the conductive pattern;
An electrode body for extracting the resistance change;
An abnormality determination circuit that converts the resistance change taken out by the electrode body into a current or voltage level and determines an abnormality from the level change;
An abnormality detection device for a flexible cable comprising:

(Appendix 7) The electrode body is disposed along the conductor pattern,
The heat sensitive body layer is installed on the same layer as the electrode body with both ends of the electrode body sandwiched between them.
The flexible cable abnormality detection device according to appendix 6.

(Supplementary note 8) The abnormality determination circuit includes a first comparison circuit that generates a determination output indicating the heat generation abnormality when the level of the current or voltage is lowered or increased from a first reference level;
A second comparison circuit that generates a discrimination output indicating an abnormality of the electrode body when the level falls or rises below a second reference level;
The flexible cable abnormality detection device according to appendix 6 or appendix 7.

(Supplementary note 9)
A first electrode body disposed on the conductive pattern via the insulating layer and sandwiched between the heat sensitive layers;
On the same layer as the first electrode body and the heat sensitive body layer, a part thereof is disposed around the first electrode body with the heat sensitive body layer sandwiched therebetween, and the other part is a peripheral edge of the insulator layer. A second electrode body arranged along
With
The abnormality determination circuit converts a resistance value change between the first electrode body and the second electrode body into a current or voltage level.
The abnormality detection apparatus for a flexible cable according to any one of appendix 6 to appendix 8.

(Appendix 10) The abnormality determination circuit determines an abnormality based on the resistance change caused by damage of at least one of the first electrode body or the second electrode body.
The flexible cable abnormality detection device according to appendix 9.

(Supplementary Note 11) A heat sensitive layer is additionally provided on the conductive pattern through an insulating layer for insulating the conductive pattern.
The resistance change that occurs in the heat sensitive body layer due to heat generation, contact abnormality or damage of the conductive pattern is taken out by the electrode body,
Abnormality detection method for flexible cables.

(Appendix 12) Further, the resistance change is converted into a current or voltage level, and a heat generation abnormality or a breakage abnormality of the electrode body is determined from the change in level.
The flexible cable abnormality detection method according to attachment 11.

(Supplementary note 13) an insulating layer for insulating the conductive pattern;
A heat sensitive layer that is provided alongside the conductive pattern via the insulating layer and causes a resistance change due to heat generation, contact abnormality or breakage of the conductive pattern;
An electrode body for extracting the resistance change;
An abnormality determination circuit that converts the resistance change taken out by the electrode body into a current or voltage level and determines an abnormality from the level change;
A power supply for supplying power to the conductive pattern;
When it is determined that the heat generation is abnormal, a control unit that stops the supply of power by the power supply unit;
Electronic equipment comprising.

(Additional remark 14) The said electrode body is arrange | positioned along the said conductor pattern,
The heat sensitive body layer is installed on the same layer as the electrode body with both ends of the electrode body sandwiched between them.
The electronic device according to attachment 13.

(Supplementary Note 15) The abnormality determination circuit includes:
A first comparison circuit for producing a discrimination output indicating the heat generation abnormality when the level is lowered or raised from a first reference level;
A second comparison circuit that generates a discrimination output indicating an abnormality of the electrode body when the level falls or rises below a second reference level;
The electronic device according to appendix 13 or appendix 14.

(Supplementary Note 16) The abnormality determination circuit determines abnormality based on the resistance change caused by damage of at least one of the first electrode body or the second electrode body.
The electronic device according to attachment 15.

(Additional remark 17) Furthermore, it has an alerting | reporting means to alert | report the state of an electronic device by an audio | voice or a display,
The control unit causes the notification means to notify when a heat generation abnormality or a damage abnormality occurs according to a determination result of the abnormality determination circuit.
The electronic device according to any one of appendix 13 to appendix 16.

(Additional remark 18) Furthermore, the monitoring means which monitors the operation state of an electronic device,
A time measuring means for measuring the elapsed time;
With
The control unit stops the abnormality determination circuit when the electronic device does not operate according to a monitoring result of the monitoring unit and a predetermined time has elapsed.
The electronic device according to any one of appendix 13 to appendix 17.

As described above, the flexible cable, the abnormality detection device, the abnormality detection method, and the preferred embodiment of the electronic device according to the present disclosure have been described, but the present invention is not limited to the above description, and is claimed. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist of the invention described in the scope of the present invention or disclosed in the specification, and such modifications and changes are included in the scope of the present invention. Needless to say.

2 Flexible cable 4 Cable body portion 6, 222, 232, 252 Abnormality detection sensor portion 8 Conductive pattern 10, 20, 24 Insulating layer 12, 236, 238, 240, 254, 256 Heat sensitive body 14, 16, 234 Electrode body 18 Abnormal Discrimination circuit 22 Conductive pattern layer 26 Radio wave shield layer 30 Space portion 32 Exterior case 40 Abnormality detection device 42 Heat sensitive portion 44 Resistance change detection portion 46 Abnormality discrimination portion 50 Abnormality detection circuit 52 Resistance-voltage conversion circuit 54 Voltage comparison circuit 60 Control portion 62 Power supply unit 70 Pull-up resistor 72 Comparison result 74 Comparison inversion result 80, 90 Regulator 81, 220, 230, 250 Electronic device 82, 84 Comparator 83 System control circuit 85 Power supply 86 Pull-up circuit 87 Power cut-off circuit 88 Display warning display Part 92 Power control C
94 Timer standby detection 100 System CPU
102 baseband CPU
104 Memory 105 LCD unit 120 Mobile phone 126 Hinge part 200 PC
206 Hinge part

Claims (7)

An insulating layer for insulating the conductive pattern;
A heat sensitive layer that is provided alongside the conductive pattern via the insulating layer and causes a resistance change due to heat generation, contact abnormality or breakage of the conductive pattern;
A first electrode body installed on the conductive pattern via the insulating layer and sandwiched between the heat sensitive layers to extract the resistance change;
On the same layer as the first electrode body and the heat sensitive body layer, a part thereof is disposed around the first electrode body with the heat sensitive body layer sandwiched therebetween, and the other part is a peripheral edge of the insulator layer. A second electrode body arranged along the line to extract the resistance change;
Flexible cable with The heat sensitive body layer is composed of a conductive polymer having a negative temperature characteristic in which a resistance value decreases due to heat generation of the conductive pattern,
The flexible cable according to claim 1 . An insulating layer for insulating the conductive pattern;
A heat sensitive layer that is provided alongside the conductive pattern via the insulating layer and causes a resistance change due to heat generation, contact abnormality or breakage of the conductive pattern;
An electrode body for extracting the resistance change;
An abnormality determination circuit that converts the resistance change taken out by the electrode body into a current or voltage level and determines an abnormality from the level change;
Equipped with a,
A first comparison circuit that generates a determination output indicating the heat generation abnormality when the level of the current or voltage is decreased or increased from a first reference level; and the level is higher than a second reference level. when the reduced or elevated, the abnormality detecting device of a flexible cable Ru comprises a second comparator circuit which produces a discrimination output which represents the breakage abnormality of the electrode body. A heat sensitive layer is provided on the conductive pattern via an insulating layer that insulates the conductive pattern;
Heating of the conductive pattern, the contact abnormality or resistance change occurring in the heat-sensitive layer due to a broken, the said conductive pattern on the installed via an insulating layer, a first electrode member sandwiched between the heat-sensitive layer, wherein On the same layer as the first electrode body and the heat sensitive body layer, a part thereof is disposed around the first electrode body with the heat sensitive body layer sandwiched therebetween, and the other part is disposed on the periphery of the insulator layer. Take out with the second electrode body arranged along ,
Abnormality detection method for flexible cables. An insulating layer for insulating the conductive pattern;
A heat sensitive layer that is provided alongside the conductive pattern via the insulating layer and causes a resistance change due to heat generation, contact abnormality or breakage of the conductive pattern;
A first electrode body installed on the conductive pattern via the insulating layer and sandwiched between the heat sensitive layers to extract the resistance change;
On the same layer as the first electrode body and the heat sensitive body layer, a part thereof is disposed around the first electrode body with the heat sensitive body layer sandwiched therebetween, and the other part is a peripheral edge of the insulator layer. A second electrode body arranged along the line to extract the resistance change;
An abnormality determination circuit that converts the resistance change taken out by the electrode body into a current or voltage level and determines an abnormality from the level change;
A power supply for supplying power to the conductive pattern;
When it is determined that the heat generation is abnormal, a control unit that stops the supply of power by the power supply unit;
Electronic equipment comprising. Furthermore, a notification means for notifying the state of the electronic device by voice or display is provided,
The control unit causes the notification means to notify when a heat generation abnormality or a damage abnormality occurs according to a determination result of the abnormality determination circuit.
The electronic device according to claim 5 . And monitoring means for monitoring the operating state of the electronic device;
A time measuring means for measuring the elapsed time;
With
The control unit stops the abnormality determination circuit when the electronic device does not operate according to a monitoring result of the monitoring unit and a predetermined time has elapsed.
The electronic device according to claim 5 or 6 .

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