Static elimination structure and vehicle

Abstract

To provide a static electricity elimination structure that suppresses the impact of electromagnetic noise generated by equipment mounted on a vehicle on the vehicle body. [Solution] The static elimination structure according to the present invention has wiring for connecting one end to an electrical device mounted inside a vehicle and the other end to the negative terminal of a battery mounted in the vehicle or to the ground portion of the vehicle, thereby allowing electromagnetic noise generated in the device to flow through the wiring to the negative terminal of the battery or the ground portion.

Description

Technical Field

[0001] The present invention relates to a static elimination structure for vehicles and vehicles.

Background Art

[0002] Since a vehicle is electrically insulated from the ground by tires with low conductivity, when static electricity is generated in the vehicle, electric charges are charged on the vehicle body and the like. Patent Document 1 describes a technique of providing a self-discharging static eliminator fixed to the surface of a specific member constituting a displacement transmission system or the like, and the static eliminator discharges static electricity by self-discharge to reduce the charge amount of the specific member, thereby reducing the difference in charge amount between members.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Due to electromagnetic wave noise generated in various in-vehicle devices that use electricity such as a drive recorder, the in-vehicle devices and the vehicle body are charged. It is known that charging of the vehicle body and the like has an unfavorable influence on the controllability and running stability of the vehicle. Therefore, in addition to the technique described in Patent Document 1, it is desirable to further suppress the influence of electromagnetic wave noise generated in the devices mounted on the vehicle on the vehicle body.

[0005] An object of the present invention is to provide a static elimination structure that suppresses the influence of electromagnetic wave noise generated in devices mounted on a vehicle on the vehicle body.

Means for Solving the Problems

[0006] The static elimination structure according to the present invention includes wiring for connecting one end to an electrical device mounted inside a vehicle and the other end to the negative terminal of a battery mounted in the vehicle or to the ground portion of the vehicle, thereby allowing electromagnetic noise generated in the device to flow through the wiring to the negative terminal of the battery or the ground portion. [Effects of the Invention]

[0007] The present invention provides a static electricity elimination structure that suppresses the influence of electromagnetic noise generated by equipment mounted on a vehicle on the vehicle body. [Brief explanation of the drawing]

[0008] [Figure 1] This figure shows a schematic configuration of a vehicle equipped with a static elimination structure according to the first embodiment of the present invention. [Figure 2] This figure shows an example of the configuration of a static elimination structure according to the first embodiment of the present invention. [Figure 3] This figure shows an example of the configuration of a static elimination structure according to the second embodiment of the present invention. [Figure 4] This is a diagram illustrating the mechanism of static elimination by a self-discharging static eliminator with a static elimination structure according to the present invention. [Figure 5] This figure shows an example of the configuration of a static elimination structure according to the third embodiment of the present invention. [Modes for carrying out the invention]

[0009] The embodiments will be described below with reference to the drawings. Note that the drawings are simplified, and the technical scope of the embodiments should not be narrowly interpreted based on their depiction. Furthermore, the same elements are denoted by the same reference numerals, and redundant explanations are omitted. Also, in the following embodiments, when referring to the number of elements (including quantity, numerical value, amount, range, etc.), unless specifically stated or clearly limited to a particular number in principle, the number is not limited to that particular number and may be greater than or less than that number.

[0010] Furthermore, in the following embodiments, the components are not necessarily essential unless otherwise explicitly stated or considered to be clearly essential in principle. Similarly, in the following embodiments, when referring to the shape, positional relationship, etc., of the components, etc., it shall include those that substantially approximate or resemble their shape, etc., unless otherwise explicitly stated or considered to be clearly not essential in principle. The same applies to the numbers, etc. (including the number of items, numerical values, quantities, ranges, etc.).

[0011] <The process leading to the development of the static elimination structure 2 according to this embodiment> Static electricity is generated in vehicles such as automobiles when they are in motion, due to the airflow flowing in frictional contact with the vehicle. Static electricity is also generated by the repeated contact and separation of various parts of the tires with the road surface as the wheels rotate, and by the relative motion of components in the engine, brakes, and other systems.

[0012] Because vehicles are virtually electrically insulated from the ground by their tires, which have low conductivity, static electricity generated in a vehicle mainly results in positive charges accumulating on the vehicle body and other parts. Therefore, structures are known that reduce the charge accumulated on a vehicle by passing an electric current through it.

[0013] Furthermore, electromagnetic noise generated by various in-vehicle devices that use electricity, such as dashcams, can cause the in-vehicle devices and the vehicle body to become electrically charged. It is known that this charging of the vehicle body can have undesirable effects on the vehicle's handling and driving stability. Therefore, in addition to the technology described in Patent Document 1, it is desirable to further suppress the effect of electromagnetic noise generated by in-vehicle devices on the vehicle body.

[0014] Therefore, the static elimination structure 2 according to this embodiment was discovered. The static elimination structure 2 according to one embodiment of the present invention will be described below.

[0015] [First Embodiment] <Configuration of static elimination structure 2> Using FIGS. 1 and 2, the static electricity elimination structure 2 according to this embodiment will be described. FIG. 1 is a diagram showing a schematic configuration of a vehicle 1 including the static electricity elimination structure 2 according to the first embodiment of the present invention. FIG. 2 is a diagram showing a configuration example of the static electricity elimination structure 2 according to the first embodiment of the present invention.

[0016] The device 3 mounted inside the vehicle 1 is connected to the battery 10 via the wiring 4. The device 3 is a device that uses electricity, and examples thereof include, but are not limited to, a drive recorder, a sunroof motor, and a driving support device using a camera attached to the front of the ceiling inside the vehicle compartment.

[0017] The wiring 4 is, for example, a ground wire. When the device 3 operates, electromagnetic noise is generated. The wiring 4 allows the generated electromagnetic noise to flow to the negative terminal of the battery 10.

[0018] As shown in FIG. 2, the device 3 includes a metal part 31 and a resin housing 32. The metal part 31 is the main body part of the device 3 and the like. One end 41 of the wiring 4 is connected to the metal part 31 of the device 3. The other end 42 of the wiring 4 is connected to the negative terminal of the battery 10.

[0019] The static electricity elimination structure 2 according to this embodiment allows the electromagnetic noise generated from the device 3 to flow to the battery 10 through the wiring 4. Therefore, the static electricity elimination structure 2 can suppress the influence of the electromagnetic noise generated by the device 3 mounted on the vehicle 1 on the vehicle body.

[0020] [Second Embodiment] <Configuration of the Static Electricity Elimination Structure 2> FIG. 3 is a diagram showing a configuration example of the static electricity elimination structure 2 according to the second embodiment of the present invention. Hereinafter, the same components as those already described will be denoted by the same reference numerals, and redundant descriptions will be omitted. Matters different from the already described first embodiment will be described.

[0021] In the static electricity elimination structure 2 according to this embodiment, unlike the first embodiment, one end 41 of the wiring 4 is connected to a self-discharging static electricity eliminator 5 attached to the surface of the resin housing 32 of the device 3.

[0022] The self-discharging static eliminator 5 may be formed by shearing a composite sheet to a predetermined size and shape, in which a conductive adhesive is attached to a conductive metal foil, and a release paper covering the adhesive is attached to the adhesive. The metal foil may be made of any conductive metal, but it is preferably made of aluminum, gold, silver, copper, or an alloy thereof. Furthermore, it is preferable that the thickness of the metal foil be about 50 to 200 μm so that the sides of the metal foil have sufficient thickness to function as a discharge surface, and so that it can be deformed and fixed to flexibly conform to curved surfaces.

[0023] The planar shape of the self-discharging static eliminator 5 is not limited to a rectangular strip, but may be any shape other than a rectangle, such as a polygon, circle, or ellipse. However, it is preferable that the shape has fewer sheared parts, such as a rectangle, square, rhombus, or hexagon. The size of the self-discharging static eliminator 5 may be set appropriately depending on the part to which it is applied. For example, if the self-discharging static eliminator 5 is rectangular, the shorter side may be a few millimeters to a dozen millimeters, and the longer side may be several tens of millimeters to 100 millimeters.

[0024] Figure 4 is a diagram illustrating the static elimination mechanism of the self-discharging static eliminator 5 of the static elimination structure 2 according to the present invention. In Figure 4, (a) and (b) show a cross-sectional view and a plan view of the self-discharging static eliminator 5, respectively.

[0025] It is presumed that static elimination by the self-discharging static eliminator 5 is performed by the mechanism shown in the diagram. In the diagram, "+" and "-" represent positive and negative charges or ions, respectively, and "0" indicates that the charge is 0, i.e., that the system is electrically neutralized. Solid arrows indicate airflow, and dashed arrows indicate the movement of charges or ions.

[0026] Air is positively charged, but when the amount of positive charge on the resin housing 32 becomes very large, the air is separated into positive and negative air ions by a so-called corona discharge. The positive air ions move away from the resin housing 32 due to the repulsive force acting between them and the positive charge on the resin housing 32. Conversely, the negative air ions move closer to the resin housing 32 due to the Coulomb force acting between them and the positive charge on the resin housing 32, and the positive charge on the resin housing 32 moves closer to the negative air ions.

[0027] As a result, electrical neutralization occurs between the negative air ions and the positive charge, causing the negative air ions and positive charge to disappear, and the charge of the air to become 0. Since this phenomenon occurs repeatedly and continuously, the positive charge accumulated on the resin housing 32 is reduced, thereby eliminating static electricity from the resin housing 32. Furthermore, the phenomenon of the air being separated into positive and negative air ions by corona discharge becomes more active as the charge of the resin housing 32 increases, and therefore, it is presumed that the static elimination effect becomes more active as the charge increases. In addition, static elimination by the self-discharging static eliminator 5 is not limited to situations where air flows in one direction, as shown in Figure 4.

[0028] The resin housing 32 of the device 3 is made of resin and does not conduct electricity. Therefore, in a structure like the static elimination structure 2 according to Embodiment 1, in which one end 41 of the wiring 4 is connected to the metal part 31, there is a limit to the amount of electromagnetic noise that can be supplied to the battery 10. In the static elimination structure 2 according to this embodiment, the electromagnetic noise that has been temporarily eliminated by the self-discharging static eliminator 5 is supplied to the battery 10 via the wiring 4, thereby removing the charge from the device 3.

[0029] [Third Embodiment] Figure 5 shows an example of the configuration of the static elimination structure 2 according to the third embodiment of the present invention. In the following, components identical to those already described are denoted by the same reference numerals, redundant explanations are omitted, and matters that differ from the first and second embodiments already described will be explained.

[0030] In the static elimination structure 2 according to this embodiment, unlike the first and second embodiments, the other end 42 of the wiring 4 is connected to the ground portion 20 of the vehicle 1. The ground portion 20 is, for example, the body ground of the vehicle 1.

[0031] The static elimination structure 2 according to this embodiment allows electromagnetic noise generated from the equipment 3 to flow through the wiring 4 to the ground portion 20. In the static elimination structure 2 according to this embodiment, one end 41 of the wiring 4 may be connected to either the metal portion 31 or the resin housing 32 of the equipment 3.

[0032] According to the static elimination structure 2 of this embodiment, if the vehicle 1 is provided with an earth portion 20 in advance, static elimination can be performed by utilizing the earth portion 20, thus enabling effective use of the earth portion 20 for static elimination.

[0033] <Effects of the static elimination structure 2 according to the embodiment> In the embodiment of the present invention, the static elimination structure 2 directs electromagnetic noise generated in the equipment 3 to the battery 10 through the wiring 4. Therefore, the static elimination structure 2 can efficiently direct electromagnetic noise generated in the equipment 3 mounted on the vehicle 1 and the charge on the equipment 3 to the battery 10 or the ground portion 20.

[0034] Therefore, according to the static elimination structure 2 of this embodiment, it is possible to suppress the influence of electromagnetic noise generated in the equipment 3 mounted on the vehicle 1 on the vehicle body.

[0035] Although the present invention has been described above in accordance with the embodiments described above, the present invention is not limited to the configuration of the embodiments described above, and of course includes various modifications, alterations, and combinations that can be made by a person skilled in the art within the scope of the claims of the present patent application. [Explanation of symbols]

[0036] 1 vehicle 2 Static elimination structure 3 equipment 4 Wiring 5 Self-discharge static eliminator 10 batteries 20 Grounding part 31 Metal parts 32 Resin housing 41 One end 42 The other end

Claims

1. The wiring is provided for connecting one end to an electrical device installed inside the vehicle, and the other end to the negative terminal of the battery installed in the vehicle, or to the ground portion of the vehicle. The electromagnetic noise generated in the aforementioned device is transmitted through the wiring to the negative terminal of the battery or to the ground portion. Static elimination structure.

2. The one end of the wiring is connected to the metal part of the device. The static elimination structure according to claim 1.

3. The aforementioned end of the wiring is connected to a self-discharging static eliminator attached to the surface of the resin housing of the device. The static elimination structure according to claim 1.

4. A static elimination structure according to any one of claims 1 to 3, vehicle.

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