JPH08268176A - Vehicle ground wire connection structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it easy to attach without loosening the ground wire that is stretched between the conductive part of the vehicle body and the conductive part of the chassis mounted on the vehicle body. [Arrangement] An arc-shaped hook 12 is formed at each end of the conductive spring 11, and the spring 11 is provided between the member 2 which becomes the conductive portion of the vehicle body and the conductive portion of the chassis (tuner 1) mounted on the vehicle body. It was stretched. Assembling procedure: Spring on member 2
After mounting the housing (tuner 1) after mounting 11, the spring 11 may be extended and connected, or the spring 11 may be mounted on both sides from the beginning and then the housing may be mounted. In both cases, a screwdriver is not required, the number of parts is reduced, and the spring 11 does not contract and loosen during installation. In addition, a flat portion is formed on the hook and the other end of the spring 11 where the tension is applied to increase the contact surface and counter the noise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle ground wire connection structure for stabilizing the stability of audio equipment for automobiles.

[0002]

2. Description of the Related Art Conventionally, audio equipment such as tuners and amplifiers mounted on an automobile is wired for supplying electricity from a battery and grounded to prevent noise from being picked up. Further, in Japanese Patent Laid-Open No. 57-209437, a bonding wire is connected between the conductive portion of the vehicle body and the engine,
It is disclosed that the potential difference between the engine and the vehicle body is eliminated to reduce noise during engine operation. In this way, the ground wire and the bonding wire are fixed between the housing (tuner, engine, etc.) and the vehicle body conducting part at both ends with the respective set screws, but the screw tightening position is on the back side of the panel. The work space is often small for screw tightening with a screwdriver.

Therefore, as shown in FIG. 6, in the case of grounding a case-grounded tuner (housing) 1, a vehicle body conducting portion, that is, a metal member 2 is connected to a grounding wire 4 provided with a coupler 3 to connect the tuner. Similarly, the ground wire 7 including the insertion side coupler 6 is attached to the body case 5 of No. 1 and the tuner 1
The couplers 3 and 6 are connected when the is attached.

[0004]

However, it is necessary to attach each of the ground wires 4 and 7 to the housing and the conductive portion of the vehicle body, and to extend the connection work of the couplers 3 and 6 to facilitate the connection work. Since the couplers 3 and 6 are mounted by using the ground wires 4 and 7, it will be too long and slack unless the ground wires 4 and 7 are clamped after the assembly.
Post-processing work will increase.

It is an object of the present invention to provide a vehicle earth wire connection structure capable of connecting a housing mounted on a vehicle and a vehicle body conductive portion by a simple operation.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to form an arc-shaped hook at each end of a conductive spring so that a conductive portion of a vehicle body and a conductive portion of a casing mounted on the vehicle body. It is characterized in that the spring is stretched between and.

In the above structure, a flat portion is formed at a position where the spring tension of the arc-shaped hook is applied, and a flat portion which is in surface contact with the flat portion of the hook is provided on each of the conductive portion on the vehicle body side and the casing side. It is characterized by

[0008]

The present invention is configured as described above. By hooking a spring on the conductive portion of the vehicle body, mounting the housing on the vehicle, extending the spring, and hooking the other hook on the housing. Can be grounded.

Further, the flat portion provided on the hook is in surface contact with the flat portions provided on the conductive portions on the vehicle body side and the housing side, and is pressed by the tension of the spring to form a dense connection. The tension applied to the flat portion may be a component of the tension in the expansion / contraction direction of the spring.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The tuner (audio equipment) shown in FIG.
1, a body mounting bracket 8 is fixed to a body case 5, and power is supplied from a battery 9 (see FIG. 5). The tuner 1 is installed by the bracket 8, but it is often assembled with a vibration-proof rubber interposed.
The ground directly connects the body case 5 and the steel (metal) member (vehicle body side conductive portion) 2 to each other. An engaging portion 9 shown in FIG. 2B is formed in the bracket 8, and a hook hole 10 is formed in the member 2 near the installation position of the tuner 1 and is formed at both ends of the metal spring 11. The hook 12 is engaged with the engaging portion 9 and the hole 10.

As shown in FIG. 2 (a), the spring 11 made of a round bar has arcuate hooks 12 formed at both ends thereof, and a part of the arcuate tensioned spring 11 is rolled. To form a flat portion 13. Similarly, in the engaging portion 9 of FIG. 2B, the flat portion 14 is formed so as to face the flat portion 13 of the hook 12. Flat part 14 of engaging part 9
Bends the plate portion protruding inside the hook insertion hole 15, and at this bending angle, the flat portions 13 and 14 are overlapped with each other as shown in FIG. It has become.

As described above, when an audio device is mounted on an automobile, a ground circuit is formed only by hooking both ends of the spring 11 on the respective members. Therefore, the assembly procedure is also to mount the spring 11 before and after mounting the audio device. The order can be conveniently selected, the assembling work is facilitated, and the contact surface of the spring 11 is large, so that sufficient noise countermeasures can be taken.

Further, as shown in FIG. 3 (a), the end of the spring 11 is formed into a flat plate to form a hook 16 which is bent into an arc shape, and the mating engaging portion 9 is formed into a hook 16 in FIG. 3 (b). The pin 18 with the stopper 17 may be used as shown in FIG. 3, and in this case, as shown in FIG. 3 (c), the peripheral surfaces of the pins are flat parts, and these parts are joined together. Further, although the hooks 12 and 16 are formed in an arc shape, they may be formed in an inverted V shape as long as a flat portion is formed, and the corresponding pins are triangular.

By using the hook 12 in this way, even in the case of the engine described above, as shown in FIG. 4, the space between the metal wall surface 19 of the engine room and the engine body 20 is narrow, and there is no space for the driver. The hooks 12 of the springs 11 can be easily hung on each other and can also be used as a bonding wire for noise suppression.

Further, as shown in FIG. 5, the negative side of the battery 9 may be dropped on the vehicle body and the spring 11 may be used as a negative lead wire. The tuner 1 is attached to the instrument panel 21, and this panel 21
Is made of synthetic resin, and the negative side of the battery 9 is made conductive through the member 2 and the dash panel 22, so that the wiring is only on the positive side, so that the lead wire can be easily routed.

[0016]

Since the present invention is configured as described above, a spring is stretched by a hook between the conductive portion of the vehicle body and the housing, which eliminates the need for a conventional driver or the like. Moreover, since no coupler is used, the cost can be reduced. Also, ground wiring can be easily performed even in a narrow space, and even models having different mutual positional relationships can be used in common to some extent. Also,
Since the spring at the time of installation contracts and does not sag, it does not interfere with other parts and does not interfere with other work.

Further, since the flat portions of the hook and the engaging portion are in contact with each other, the contact surface is large, and the electric conductivity is good, so that noise is easily absorbed, and the noise is prevented from occurring and also serves as the power supply line of the battery. You can also

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a vehicle earth wire connection structure according to an embodiment of the present invention.

2 is a perspective view showing a hook and a corresponding engaging portion of a spring used in the vehicle earth wire shown in FIG. 1. FIG.

FIG. 3 is a perspective view showing a modified example of the hooks of the spring shown in FIG. 2 and the corresponding engaging portions.

FIG. 4 is a schematic diagram showing a state in which the spring of the embodiment is applied to an engine.

FIG. 5 is a schematic diagram showing a state in which the spring of the embodiment is applied to battery wiring.

FIG. 6 is a schematic diagram showing a conventional ground wire connection structure.

[Explanation of symbols]

 1 Conductive part of the housing 2 Conductive part of the vehicle body 11 Spring 12,16 Hook 13,14 Flat part

Claims (2)

[Claims] 1. A conductive spring is formed with an arcuate hook at each end thereof, and the spring is stretched between a conductive portion of a vehicle body and a conductive portion of a casing mounted on the vehicle body. Vehicle ground wire connection structure. 2. A flat portion is formed at a portion of the arcuate hook where spring tension is applied, and a flat portion is provided on each of the conductive portions on the vehicle body side and the housing side so as to make surface contact with the flat portion of the hook. The connection structure for a vehicle ground wire according to claim 1.