JP7419834B2 - Equipment equipped with an image forming device and a wire harness - Google Patents

Description

The present invention relates to an image forming apparatus and a device including a wire harness.

Currently, image forming apparatuses that form images, such as MFPs (Multifunction Printers) and laser printers, are widely used.

Image forming apparatuses use many drive units such as motors and heaters. As the number of drive units increases, more wire harnesses are used for power supply and control communication to the drive units.

Inside the image forming apparatus, combustible members such as resin gears and pulleys are used as drive transmission means. Patent Document 1 describes an invention in which drive transmission means such as gears and harnesses such as high voltage lines are placed on opposite sides of each other in order to prevent ignition of gears, pulleys, etc. due to sparks from high voltage lines, and the machine structure prevents ignition. A configuration for preventing this is disclosed.

However, there is a problem in that it is difficult to prevent the spread of fire when the wire harness is large enough to crawl inside the image forming apparatus.

The present disclosure has been made in view of the above, and an object of the present disclosure is to prevent the spread of fire caused by an ignition source on the path of a current flowing through a wire harness, on a scale as small as possible.

According to one aspect of the present disclosure, the image forming apparatus includes a wire harness, and the image forming apparatus is provided on a path of current flowing through the wire harness, and when an overcurrent flows, the temperature becomes higher than other parts on the path. and a fire spread prevention member that covers the heat generation part, the wire harness has a region spaced apart from the heat generation part exposed from the fire spread prevention member, and the heat generation part includes a wire of the wire harness. The present invention provides an image forming apparatus that is a knot portion in which the wire of the wire harness is tied, or a coil winding portion in which the wire of the wire harness is wound into a coil .

According to the present disclosure, it is possible to prevent the spread of fire caused by the ignition source being on the path of the current flowing through the wire harness on a minimum scale.

FIG. 3 is a diagram illustrating an overview of the wire harness crawling of the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating prevention of fire spread in the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating means for facilitating ignition at a specific location in the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating means for facilitating ignition at a specific location in the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating means for facilitating ignition at a specific location in the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating means for facilitating ignition at a specific location in the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating means for making it difficult to cause a fire to occur in the image forming apparatus according to the first embodiment. FIG. 3 is a diagram illustrating an image forming apparatus according to a second embodiment. FIG. 7 is a diagram illustrating a case where a short circuit occurs in a cable in an image forming apparatus according to a second embodiment. FIG. 7 is a diagram illustrating a first modification of the image forming apparatus according to the second embodiment. FIG. 7 is a diagram illustrating a second modification example of the image forming apparatus according to the second embodiment. FIG. 7 is a diagram illustrating a third modification example of the image forming apparatus according to the second embodiment. It is a figure explaining a 1st comparative example. It is a figure explaining a 2nd comparative example. FIG. 7 is a diagram illustrating a case where a short circuit occurs in a wire harness in a second comparative example.

Hereinafter, embodiments for implementing the present disclosure will be described with reference to the drawings. Note that, in this specification and the drawings, substantially the same configurations are designated by the same or corresponding symbols to avoid redundant explanation.

<<First embodiment>>
FIG. 1 is a diagram illustrating an overview of the wire harness crawling of the image forming apparatus 1 according to the first embodiment.

The image forming apparatus 1 according to the first embodiment is, for example, a laser printer. The image forming apparatus 1 includes a power source PS1 connected to a power inlet I1. Power is supplied to the power source PS1 from the outside via a power inlet I1. The power supply PS1 supplies the supplied power to each component of the image forming apparatus 1. Further, the image forming apparatus 1 according to the first embodiment includes printed circuit boards PCB1 and PCB2. Each component of the image forming apparatus 1 is controlled on the printed circuit boards PCB1 and PCB2. Further, the image forming apparatus 1 according to the first embodiment includes motors M1, M2, M3, M4, and a heater H1. Each motor is, for example, a motor for rotating a charging roller, a developing roller, and the like. The heater H1 is, for example, an image fixing heater. Further, the image forming apparatus 1 according to the first embodiment includes sensors S1, S2, and S3. Each sensor is, for example, a temperature sensor, an ink remaining amount sensor, or the like. Furthermore, the image forming apparatus 1 according to the first embodiment includes a display light emitting element L1 and a switch SW. Each component is connected by a wire harness WH.

In the image forming apparatus 1, a large number of components are connected by a wire harness WH. Therefore, the wire harness runs around every corner of the image forming apparatus 1. If the wire harness that runs throughout the image forming apparatus 1 ignites, it is difficult to take measures to prevent the spread of the fire unless it is possible to identify where the ignition occurs. For example, it is conceivable to cover all wire harnesses with a fire spread prevention member. However, a method of preventing the spread of fire in which all wire harnesses that are crawled on a large scale are covered with a fire spread prevention member is not realistic because the range of measures and the cost of measures become large. Therefore, in the image forming apparatus 1 of the first embodiment, the spread of fire is prevented by making it easier to ignite at specific locations.

A specific method will be explained. FIG. 2 is a diagram illustrating prevention of fire spread in the image forming apparatus 1 according to the first embodiment.

In the image forming apparatus 1 according to the first embodiment, a specific location on one wire harness WH1 has a high impedance or a location where heat is easily trapped. The wire harness WH1 includes a wire W between the connector C1 and the connector C2. Flammable members FM1 and FM2, such as resin gears and pulleys, are arranged around the wire harness WH1. The wire W has a heat generating region RH and low heat generating regions RN1 and RN2 on both sides thereof. The heat generation region RH is a region where the temperature rises more than the low heat generation regions RN1 and RN2 when an overcurrent flows through the wire W. How to make the temperature of the heat generating region RH relatively higher than that of the low heat generating regions RN1 and RN2 when an overcurrent flows through the wire W will be described later. The image forming apparatus 1 according to the first embodiment includes a fire spread prevention member Bar1 so as to cover the heat generating region RH. The fire spread prevention member Bar1 is a member that prevents the spread of fire when a fire occurs in a heat generating portion of the heat generating region RH, which will be described later. The fire spread prevention member Bar1 is made of a noncombustible material, such as metal.

In the wire harness WH1, when an overcurrent flows, the temperature of the heat generating region RH increases compared to the low heat generating regions RN1 and RN2. As the temperature of the heat generating region RH increases, the heat generating region RH is more likely to catch fire than the low heat generating regions RN1 and RN2. Therefore, by providing the fire spread prevention member Bar1 in the heat generating region RH, it is possible to prevent the fire from spreading to the combustible members FM1 and FM2. By providing the heat generating region RH in the wire harness WH1, it is possible to limit the region where ignition occurs when overcurrent continues to flow, that is, the region where the ignition source FP exists. By limiting the area where the ignition source FP exists when overcurrent continues to flow, it becomes possible to take measures against the spread of fire by covering the specific location that becomes the ignition source FP with a fire spread prevention member. By having the heat generating region RH in the wire harness WH1, it is possible to limit the range in which measures to prevent the spread of fire are taken. That is, the fire spread prevention member Bar1 covers the heat generating region RH having the heat generating part. Further, a part of the wire harness WH (low heat generation regions RN1, RN2) spaced apart from the heat generation part of the heat generation region RH is exposed from the fire spread prevention member Bar1. Therefore, the spread of fire caused by the ignition source being on the path of the current flowing through the wire harness is prevented to a minimum extent. Furthermore, by limiting the range, the cost of countermeasures can be kept to a minimum.

Furthermore, the wire ignites in the heat generating region RH of the wire harness WH, causing the wire to melt and break. Damage can be minimized by cutting electrical wires and preventing continuity.

A method will be described in which the temperature of the heat generating region RH of the wire W of the wire harness WH increases relative to the low heat generating regions RN1 and RN2 when an overcurrent flows through the wire W, thereby making it easier to ignite. 3 to 6 are diagrams illustrating means for facilitating ignition at specific locations in the image forming apparatus 1 according to the first embodiment.

FIG. 3 shows a method of increasing the temperature and making it easier to ignite by providing a knot KN1 in the wire W1. By providing the knot part KN1 in the wire W1, the impedance of the part of the knot part KN1 becomes high. Due to the high impedance, it becomes easier to generate heat when an overcurrent flows. Furthermore, by providing the knot part KN1, the flow of air in the knot part KN1 becomes poor and heat tends to accumulate. As heat becomes more likely to accumulate, the temperature becomes more likely to rise. Therefore, when an overcurrent flows through the wire W1, the temperature of the knotted portion KN1 rises, making it easier to catch fire.

FIG. 4 shows a method in which the wire W2 is provided with a coil winding portion CL to increase the temperature and make it easier to ignite. By providing the coil winding portion CL in the wire W2, the impedance of the coil winding portion CL increases. Due to the high impedance, it becomes easier to generate heat when an overcurrent flows. Furthermore, by providing the coil winding part CL, the flow of air in the coil winding part CL becomes poor and heat tends to accumulate. As heat becomes more likely to accumulate, the temperature becomes more likely to rise. Therefore, when an overcurrent flows through the wire W2, the coil winding portion CL is likely to catch fire.

Furthermore, in order to adjust the degree of temperature rise, it is necessary to provide a plurality of knots in series, for example, like knots KN21, KN22, and KN23 in FIG. 5 (the knots are collectively referred to as knot row KN2). It may be adjusted accordingly. In addition, in FIG. 5, each knot portion is represented by a circle. For example, if it is desired to further increase the degree of temperature rise in the knot row KN2, the number of knots may be increased. Further, in order to adjust the degree of temperature rise, a large knot portion may be provided by wrapping a plurality of times around one point and stacking a plurality of knot portions. In addition, in FIG. 6, the size of the circle represents how the wire is wound multiple times.

In the above, a method for adjusting the degree of temperature rise of the knot portion has been described, but the degree of temperature rise of the coil winding portion CL may also be adjusted by changing the number of coil windings, the number of windings, or multiple windings.

Note that the knot portion and the coil winding portion are examples of the heat generating portion.

Also, a description will be given of means for making it difficult to cause ignition in the low heat generation regions RN1 and RN2. FIG. 7 is a diagram illustrating means for making it difficult to cause a fire to occur in the image forming apparatus according to the first embodiment.

In the low heat generation regions RN1 and RN2, the wires of the wire harness WH are routed straight so as not to bend. By running the wires of the wire harness WH straight so as not to bend them, the impedance is lowered. By lowering the impedance, ignition can be made less likely. Furthermore, by running the wires of the wire harness WH straight so as not to bend them, it is possible to prevent heat from building up. By making it difficult for heat to accumulate, it is possible to suppress a rise in temperature. For example, if there is a bend in the middle of the wire WZ like the wire WZ shown in FIG. 7(A), there is a possibility that a fire will ignite from that point. Therefore, the wire is wired so as to have a large bending radius, like the wire W5 in FIG. 7(B).

We will explain the specific conditions that make it difficult to ignite. For example, when changing the direction of the wire harness, the following angle is specified for the bending radius (the amount of bending of the wire). Here, the bending radius is R (mm), and the nominal wire diameter of the wire (thickness (diameter) of the wire bundle) is D (mm).

If D is 8 or less: R is 4D or more If D is greater than 8 and less than or equal to 12: R is 5D or more If D is greater than 12: R is 6D or more In this way, by crawling the wire, the impedance becomes high. This can prevent heat build-up and heat build-up.

<Action/Effect>
The image forming apparatus 1 of this embodiment includes a heat generating part on the path of the current flowing through one wire harness, which causes the temperature to rise more than other parts on the path when an overcurrent flows only in a specific part. By providing a heat generating part only at a specific location of the wire harness, if an overcurrent flows through the wire harness, smoke and fire will be emitted from the heat generating part, making it possible to identify dangerous locations in advance. Further, since it is only necessary to cover with a fire spread prevention member only those areas where there is a risk of smoke and ignition, it is possible to reduce the range of countermeasures and the cost of countermeasures. Therefore, the spread of fire caused by the ignition source being on the path of the current flowing through the wire harness is prevented to a minimum extent.

The image forming apparatus 1 of this embodiment provides a heat generating area by installing a knot part and a coil winding part. Since the heat generating area can be formed by changing the shape of the wire wiring, no additional parts are required and this can be achieved at low cost. Furthermore, by changing the number of turns, etc., the degree of temperature rise can be adjusted. In addition, the knot and the coil winding are formed on a part of the wiring, and the wire is fixed so that it can be moved slightly, so by changing the position of the knot and the coil winding, the ignition point can be set as desired. It can be shifted to

Here, a first comparative example will be explained. FIG. 13 is a diagram illustrating the first comparative example. The wire harness WHZ of the first comparative example includes a wire WZ between the connector CZ1 and the connector CZ2. The wire WZ is not provided with a heat generating area. Since no heat generation region is provided, it is impossible to predict where in the wire WZ a fire will occur when an overcurrent continues to flow through the wire harness WHZ. That is, it is impossible to predict where on the wire WZ the ignition source FPZ will be. Therefore, when taking measures to prevent the spread of fire, it is necessary to cover the entire wire WZ of the wire harness WHZ with the fire spread prevention member BarZ. However, since the scale of wiring harnesses is large, it is not practical to cover all wire harnesses with fire spread prevention members because the range of measures and the cost of measures will increase. On the other hand, in the image forming apparatus 1 of this embodiment, it is possible to reduce the range of countermeasures and the cost of countermeasures.

<<Second embodiment>>
Next, a second embodiment will be described.

Printed circuit boards usually have the potential to catch fire. Since there is a possibility of ignition, in order to prevent machine burnout due to the printed circuit board as an ignition source, printed circuit boards are surrounded by flame-retardant materials such as sheet metal to prevent the spread of fire. The image forming apparatus of the second embodiment prevents machine burnout caused by an ignition source on the path of a current flowing through a wire harness connected from a printed circuit board to each sensor, motor, and the like.

FIG. 8 is a diagram illustrating the image forming apparatus 1 according to the second embodiment. FIG. 8 is a diagram illustrating a harness connection configuration between the printed circuit board PCB3 and the sensor S5 of the image forming apparatus 1 according to the second embodiment. The printed circuit board PCB3 and the sensor S5 are connected by a main harness WHM and a relay harness WHS whose impedance is set higher than that of the main harness WHM. A combustible member FM3 is provided near the main harness WHM. By increasing the impedance of the relay harness WHS, it becomes easy to generate heat when an overcurrent flows. Therefore, when an overcurrent flows, the temperature of the relay harness WHS increases more than that of the main harness WHM. Then, the relay harness WHS is installed in a fire spread prevention member BarP of a printed circuit board PCB3 made of a sheet metal or the like. That is, it covers the relay harness WHS, whose temperature increases more than the main harness WHM when an overcurrent flows. Further, a region of the main harness WHM that is spaced apart from the relay harness WHS is exposed from the fire spread prevention member BarP. In addition, the configuration is such that the setting of the magnitude relationship between the impedances of the main harness WHM and the relay harness WHS is managed and set based on the thickness of the electric wire. Although it is possible to manipulate impedance based on factors other than the wire thickness, if the impedance is managed and set based on the wire thickness, it becomes possible to manage the impedance using only the wire number of the wire used, and it can be handled with a simple configuration.

FIG. 9 is a diagram illustrating a case where a short circuit occurs in a cable in the image forming apparatus 1 according to the second embodiment. FIG. 9 is a diagram illustrating the operation (burnout process) when an abnormality occurs in the main harness WHM. When an abnormality such as a layer short occurs at the short point SP indicated by "X" in FIG. 9, an overcurrent flows to the main harness WHM and the relay harness WHS. When an overcurrent flows through the main harness WHM and the relay harness WHS, the temperature rises from a portion with high impedance, that is, the relay harness WHS, and eventually a fire occurs. After the relay harness WHS ignites, the fire spread prevention member BarP of the printed circuit board PCB3 prevents the fire from igniting and spreading to other parts. Since the ignition and spread of fire to other parts is suppressed, the fire can be extinguished and safely shut down after a certain period of time. Note that since the relay harness WHS is disconnected at the same time as the fire is fired, the abnormal current is not applied to the main harness WHM until the timing of the disconnection. Since the abnormal current flows only until the relay harness WHS is disconnected, ignition does not occur due to the current in the main harness WHM after the relay harness WHS ignites.

Note that the relay harness WHS is an example of a heat generating section.

<Action/Effect>
In the image forming apparatus 1 of the present embodiment, the machine burnout caused by the harness as an ignition source can be prevented by taking measures to prevent the spread of fire of the printed circuit board, which are usually applied. The normally applied measures to prevent the spread of fire on printed circuit boards can prevent machine burnout caused by the harness as an ignition source, so this can be done without adding any additional parts.

Here, a second comparative example will be explained. FIG. 14 is a diagram illustrating the second comparative example. In the second comparative example, the sensor S5 is connected to the printed circuit board PCB3 only by the main harness WHM. FIG. 15 is a diagram illustrating a case where a short circuit occurs in the main harness WHM in the second comparative example. When an abnormality such as a layer short occurs at the short point SP indicated by "X" in FIG. 15, an overcurrent flows to the main harness WHM. In that case, it is not known which part of the main harness WHM will ignite. In particular, there is a possibility that the harness will catch fire outside the fire spread prevention member BarP, and if it ignites, the fire will spread to other combustible members FM3, and eventually the machine will burn out. When taking measures to prevent the spread of fire, it is necessary to prevent the spread of fire throughout the main harness WHM since the location of the ignition is unknown. However, since the scale of wiring harnesses is large, covering all wire harnesses with fire spread prevention members increases the scope and cost of countermeasures. In the image forming apparatus 1 of the present embodiment, the machine burnout caused by the harness as an ignition source can be prevented by taking measures to prevent the spread of fire of the printed circuit board, which are usually applied.

<Modification 1>
FIG. 10 is a diagram illustrating a first modification of the image forming apparatus according to the second embodiment.

The portion whose temperature increases when an overcurrent flows is not limited to the wire harness, as long as it is provided on the path of the current flowing through the wire harness. For example, as in the first modified example of FIG. 10, a high impedance line LH1 may be provided between the lines LN1 and LN2 in the pattern wiring of the printed circuit board PCB4. When an overcurrent flows through the line LH1, the temperature increases more than the lines LN1, LN2, and the main harness WHM. The impedance is adjusted, for example, by changing the thickness of the pattern. In this way, the configuration can be simplified by providing a heat generating part (line LH1) that becomes hotter than other parts on the path of the current flowing through the main harness WHM when an overcurrent flows through the pattern on the printed circuit board PCB4. can do. Furthermore, by simplifying the configuration, costs can be reduced.

Note that the line LH1 is an example of a heat generating section.

<Modification 2>
FIG. 11 is a diagram illustrating a second modification of the image forming apparatus according to the second embodiment.

In FIG. 11, the image forming apparatus according to the second embodiment further includes a temperature detector TS that detects the temperature of the relay harness WHS, which is set higher than the impedance of the main harness WHM. The temperature detector TS is provided near the relay harness WHS. The printed circuit board PCB5 is provided with a control IC1 that controls the power supply line to stop supplying power when an abnormal temperature is detected (when a temperature higher than a predetermined temperature is detected). By providing the temperature detector TS, the image forming apparatus 1 can be safely stopped before the relay harness burns out or the printed circuit board PCB5 catches fire. By safely stopping the fire, it is possible to prevent not only the spread of fire but also ignition, thereby further improving safety.

<Modification 3>
FIG. 12 is a diagram illustrating a third modification of the image forming apparatus according to the second embodiment.

In FIG. 11, the image forming apparatus according to the second embodiment further includes a smoke detector SS that detects smoke generated from a relay harness WHS whose impedance is set higher than the impedance of the main harness WHM. The smoke detector SS is provided near the relay harness WHS. The printed circuit board PCB6 is provided with a control IC2 that controls the power supply line to stop supplying power when smoke is detected. By providing the smoke detector SS, the image forming apparatus 1 can be safely stopped before the relay harness burns out or the printed circuit board PCB5 catches fire. By safely stopping the fire, it is possible to prevent not only the spread of fire but also ignition, thereby further improving safety. Furthermore, since it is possible to monitor several locations with one smoke detector SS, safety can be ensured with an inexpensive configuration.

<Other variations>
In each of the above embodiments, an image forming apparatus has been described, but the present invention can be applied to any device provided with a wire harness.

Note that the present invention is not limited to the configurations shown here, such as combinations of the configurations and the like with other elements in the above embodiments. These points can be modified without departing from the spirit of the present invention, and can be appropriately determined depending on the application thereof.

1 Image forming apparatus Bar1 Fire spread prevention member BarP Fire spread prevention member CL Coil winding part KN1 Knot part KN21 Knot part KN22 Knot part KN23 Knot part LH1 Track PCB1 Printed circuit board PCB2 Printed circuit board PCB3 Printed circuit board PCB4 Printed circuit board PCB5 Printed circuit board PCB6 Printed circuit board R.H. Heat generating area SS Smoke detector TS Temperature detector WH1 Wire harness WHM Main harness WHS Relay harness

Japanese Patent Application Publication No. 2010-072520

Claims (16)

An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
The heat generating part is a knot part where the wires of the wire harness are tied together, or a coil winding part where the wires of the wire harness are wound in a coil .
Image forming device. An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
The bending radius of the wire of the wire harness in the region is larger than the bending radius of the heat generating part.
Image forming device. An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
A plurality of the heat generating parts are arranged in a row on the path.
Image forming device. An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
A plurality of the heat generating parts are stacked at one point on the route,
Image forming device. An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
the heat generating part is movably fixed;
Image forming device. An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
comprising a printed circuit board to which the wire harness is connected;
The fire spread prevention member covers the printed circuit board,
A temperature detector is provided near the heat generating part,
When the temperature detector detects a temperature higher than a predetermined temperature, the power supply is stopped;
Image forming device. An image forming apparatus including a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
comprising a printed circuit board to which the wire harness is connected;
The fire spread prevention member covers the printed circuit board,
A smoke detector is provided near the heat generating part,
When the smoke detector detects smoke, the power supply is stopped;
Image forming device. The heat generating part is a relay harness with a small wire diameter,
The image forming apparatus according to claim 6 or 7. The heat generating part is formed on the printed circuit board,
The image forming apparatus according to claim 6 or 7. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
The heat generating part is a knot part where the wires of the wire harness are tied together, or a coil winding part where the wires of the wire harness are wound in a coil .
device. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
The bending radius of the wire of the wire harness in the region is larger than the bending radius of the heat generating part.
device. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
A plurality of the heat generating parts are arranged in a row on the path.
device. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
A plurality of the heat generating parts are stacked at one point on the route,
device. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
the heat generating part is movably fixed;
device. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
comprising a printed circuit board to which the wire harness is connected;
The fire spread prevention member covers the printed circuit board,
A temperature detector is provided near the heat generating part,
When the temperature detector detects a temperature higher than a predetermined temperature, the power supply is stopped;
device. A device comprising a wire harness,
a heat generating part that is provided on the path of the current flowing through the wire harness, and whose temperature increases compared to other parts on the path when an overcurrent flows;
A fire spread prevention member that covers the heat generating part,
The wire harness has a region spaced apart from the heat generating part exposed from the fire spread prevention member,
comprising a printed circuit board to which the wire harness is connected;
The fire spread prevention member covers the printed circuit board,
A smoke detector is provided near the heat generating part,
When the smoke detector detects smoke, the power supply is stopped;
device.

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