JP3295827B2 - Power supply branching device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply branching device for a vehicle which is applied to a fuse in a fuse box of an automobile or the like.

[0002]

2. Description of the Related Art In a vehicle such as an automobile, fuses provided in a power supply circuit for various electric components are concentrated at one place and stored in a fuse box. The fuse box is located near the driver's seat in the passenger compartment so that it can be checked at any time. Conventionally, the fuse provided in this manner is a straight fuse housed in a glass tube. Recently, a fuse wire bent in a U-shape is housed in a synthetic resin flat case, A so-called flat fuse in which two flat electrode plates protrude from a mold case in one direction has been increasingly used.

Incidentally, in recent vehicles, there are many such devices as radio equipment, car televisions, auto-navigators, etc., which are installed in the room by a user after installation. In this case, a power source is required, but where to take the power source is a major problem. Conventionally, power is generally obtained by inserting a power plug into a socket of a cigar lighter.

[0004]

However, since the cigarette lighter socket is manufactured for temporary use of the cigarette lighter, the positive electrode has a point contact structure and is used for a long time. Is not suitable for This is because there is a possibility that a contact failure may occur due to vibration, a hand touching the cord, or the like. When a contact failure occurs, the portion generates heat, and the contact failure causes noise to the wireless device. Further, when a smoker gets on the board, it is necessary to unplug the power cord every time a cigarette is lit, which is inconvenient.

Conventionally, it has been common sense to take power from a cigarette lighter socket, so many related parts are available, but it was not considered to take power from other places. There were no other parts. Therefore, a cut is made in a part of the sheath of the insulated wire from the fuse box to one of the electrical components, and the wire is connected here to supply power to a new load. It is not preferable in terms of current capacity, poor contact easily, and the like.

The present invention has been made in view of this point, and aims to provide a power supply branching device for a vehicle which has a simple structure, has no room for poor contact, and can supply power stably to a load. Things.

[0007]

[0008]

According to a first aspect of the present invention , a substantially thin metal plate has a substantially central portion bent in a U-shape, and the bent portion is provided in a vehicle power supply circuit. portion and without covering the tip of one electrode plate of the fuse, is refracted so as to contact both sides of one portion arrangement <br/> outer peripheral portion of the case to the electrode plate of the flat fuse the refractive portion, the opposite end portions is polymerized at the top of the to case, the overlapping portion
A vehicular power branch apparatus, wherein a distal end of the covered electric wire are connected by soldering.

According to a second aspect of the present invention, in the first aspect of the present invention, the bonding of the overlapping portions of the metal plate is performed.
A power supply branching device for a vehicle, wherein the power supply branching device is simultaneously performed by soldering for connecting ends of covered electric wires.

According to a third aspect of the present invention, in the first aspect , a core wire of a connecting portion of the insulated wire to the metal plate is radially expanded, and soldering is performed at the expanded portion. A power supply branching device for a vehicle, characterized in that it has been performed.

[0011]

SUMMARY OF] According to the invention described in claim 1, by inserting the electrode plate covering one thin has a metal plate in the receiving side electrode just as the fuse box to the conventional flat fuses, from that portion A desired current can be obtained. In this case, if the electrode plate is connected to the power supply side of the fuse box, power can be taken regardless of whether the ignition switch is on or off, and if it is taken from the accessory terminal side, power can be taken with the ignition switch turned on. Will be. Also, for flat type fuses
The degree of adhesion of the metal plate to the electrode plate is assured.
The connection of the insulated wire to the wire is also ensured.

[0012]

According to the second aspect of the present invention, since the overlapping portions of the metal plates are simultaneously connected by soldering for connecting the ends of the covered electric wires, the production can be easily performed with a simple operation.

According to the third aspect of the present invention, the core wire of the connection portion of the insulated wire to the metal plate is radially expanded, and soldering is performed at the expanded portion, so that this portion rises. No electrical connection is ensured, and the tensile strength is increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a flat type fuse, in which two electrode plates 2 and 2 are provided so that each surface is located on the same plane and are appropriately separated from each other, and a U-shaped bent fuse wire 3 is connected therebetween. At the same time, the other ends of the electrode plates 2 and 2 are covered with a flat case 4 made of a synthetic resin except for the tip portions. This flat fuse 1 is a fuse box 2 (not shown).
By inserting the portions of the electrode plates 2 and 2 into the receiving terminals, the fuse wire 3 is connected between the two receiving terminals.

FIG. 2 shows a power supply branching device (hereinafter, referred to as a branching device) 5 for a vehicle according to the present invention. This branching device 5 has a plastic deformability and bends one thin metal plate 6 having a width substantially equal to the width of the electrode plate 2 into the same shape as the side surface shape of the flat fuse 1, It is formed in an annular body that closely covers the front end portion of one of the electrode plates 2 and the outer peripheral portion of the case 4 and is connected to this. The metal plate 6
In the embodiment, the thickness is 0.1 mm, the length is 50 mm, and the width is 4 mm.
mm phosphor bronze thin plate was used, but other materials such as brass or gold-plated brass may be used, and the thickness is 0.08 mm.
The distance may be in the range of 0.12 mm.

The bending order is as follows.
Is bent into a U-shape, and then a three-step portion 6b is formed using a mold (not shown) to match the outer shape of the flat fuse 1. Next, both ends 6c and 6d are bent in a direction facing each other. At this time, the bent portion is shifted by the plate thickness so that the end 6c overlaps the outside of the end 6d.

Since the overlapping portion of the end 6c and the end 6d is joined by soldering, this portion is thinly plated with solder before bending. The connection of this part is performed simultaneously with the connection of a covered electric wire (hereinafter referred to as an electric wire) 7 described below.

The electric wire 7 is formed by twisting a large number of strands 8,
This is covered with a synthetic resin film 9, and the cross-sectional area of the entire stranded wire is set to a size capable of obtaining a predetermined current capacity.

As shown in FIG. 3, the distal end of the wire 8 is radially expanded, and the expanded portion is placed on the upper end 6c and soldered. When the tip of the radially expanded element wire 8 is placed on the end 6c of the metal plate 6 and an iron for soldering is applied together with an appropriate amount of solder, the solder is melted by the heat of the iron. At this time, the solder between the end 6c and the end 6d, which has been solder-plated earlier, is also melted by heat conduction. When the iron is separated and cooled as it is, the electric wire 7 is connected to the end 6c, and at the same time, the end 6c and the end 6d are also connected.

After the wire 7 is connected to the end 6c, an insulating material 10 is applied to the surface of the connection. This insulating material 1
Any value may be used as 0, but a material which is in a liquid or gel state at the time of application and hardens after application is convenient for use. As an example, liquid rubber or the like can be considered, but another material may be used. In the case of liquid rubber, the appearance is improved by making the color the same as that of the covering portion of the electric wire 7.

The flat fuse 1 is inserted into the branching device 5 manufactured as described above. The size and the size of the branching device 5 are such that the one electrode plate 2 and the case 4 of the flat type fuse 1 are formed in an annular shape so as to be in close contact with the outer periphery thereof. It can be mounted by sliding and inserting. The insertion position is such that the U-shaped bent central portion 6 a of the metal plate 6 covers the one electrode plate 2 of the flat fuse 1. In this case, which of the two electrode plates 2 is to be selected is a position suitable for connecting the electric wire 7 when the flat fuse 1 is mounted on a predetermined receiving terminal of the fuse box. This is a choice depending on the type and nature of the load, such as when it is desired to connect the electric wire 7 without passing through the ignition switch or when it is desired to connect the electric wire 7 to the output side of the ignition switch.

FIG. 4 shows a state where the branching device 5 is mounted on the flat fuse 1 in this manner. In this state, the one electrode plate 2 of the flat fuse 1 and the electrode 2 on which the other branching device 5 is mounted are inserted into the receiving electrode at a predetermined position of the fuse box. Thereby, one electrode plate 2 is directly inserted into the receiving electrode, and the other electrode plate 2 is connected to the branching device 5.
The metal plate 6 is inserted into the receiving electrode through the folded plate thickness. As described above, since the metal plate 6 is sufficiently thin, no inconvenience occurs when the metal plate 6 is inserted into the receiving electrode.

By attaching the branching device 5 to the flat fuse 1, the electric wire 7 is connected to the electrode 2, so that power can be supplied to a desired electric load therefrom. When actually used, it is preferable to connect a fuse in the middle of the electric wire 7 in order to avoid the influence of a short circuit accident on the load side.

[0025]

Since the present invention is a power supply branching device for a vehicle constructed as described above, it can be mounted on a flat fuse and simply inserted into a receiving electrode of a fuse box. In addition, power can be easily supplied to an electric load. Since the bent metal plate is pressed into the receiving electrode together with the electrode plate, a current can be obtained by surface contact, and a large current can be obtained as compared with the cigarette lighter type which is a point contact. Despite the simple structure, a contact failure or the like does not occur, and a stable power supply to the load can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flat fuse.

FIG. 2 is a perspective view of a branching device according to the present invention.

FIG. 3 is a perspective view showing a distal end portion of an electric wire connected to the branching device.

FIG. 4 is a perspective view showing a state where the branching device is mounted on a flat fuse.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat type fuse 2 Electrode plate 4 Case 5 Branching device 6 Metal plate 6a Central part 6b Step part 6c End part 6d End part 7 Electric wire 8 Element wire 9 Film 10 Insulation material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 16/02 635 B60R 16/02 645 B60R 16/02 660 H01R 4/02

Claims (3)

(57) [Claims] 1. A substantially central portion of one thin metal plate is bent in a U-shape, and the bent portion is formed as a portion covering a tip of one electrode plate of a flat fuse provided in a vehicle power supply circuit . both sides of the refractive portion is refracted so as to close contact with the outer peripheral portion of the portion <br/> and case one electrode plate of the flat fuse, the polymerization of both end portions at the top of the to case, the polymerization car dual power branch device you characterized in that the leading end of the covered electric wire are connected by soldering portions. 2. The power supply branching device for a vehicle according to claim 1 , wherein the overlapping portions of the metal plates are simultaneously joined by soldering for connecting the ends of the covered electric wires. 3. The power supply branching device for a vehicle according to claim 1 , wherein a core wire of a connecting portion of the insulated wire to the metal plate is radially expanded, and soldering is performed at the expanded portion. .