JPH0229655Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an electrical connector equipped with an electrical terminal.
More specifically, the present invention relates to an electrical connector used to connect a power source outside the fuel tank to a motor of an in-tank electric fuel pump disposed inside the fuel tank.

[Conventional technology and problems]

It is known to install electric fuel pumps for automobile engines inside the fuel tank (e.g.
(Special Publication No. 53-8810, Utility Model Publication No. 130380/1983). Such a fuel pump is called an in-tank pump. As shown in Figure 1 of Japanese Utility Model Application No. 59-130380, in-tank pumps are generally mounted on a mounting board fixed to the opening of a fuel tank. In order to drive the pump by supplying power to the pump's electric motor from a power source such as a battery outside the fuel tank, one end of the covered cord with a terminal is connected to the power source outside the tank, and a covered cord with a terminal is connected inside the tank. A coated cord is provided and one end thereof is connected to the electric motor. The terminals of the outside-tank cord and the inside-tank cord are interconnected by an electrical connector attached to the pump mounting board (see Figure 1 of the above-mentioned publication).

To electrically insulate the electrical terminal from the mounting board,
The main body of the connector is made of ceramic or insulating synthetic resin. When synthetic resin is subjected to a load over a long period of time, it may creep, causing the terminal to loosen and cause sparks. Ceramics, on the other hand, do not creep, but are susceptible to cracking and are expensive.

[Purpose of invention]

The purpose of this invention is to provide an insulator that is not affected by material creep, is robust, has a simple structure, can be easily manufactured and installed in a fuel tank, and has excellent insulation and sealing properties for the mounting board. An object of the present invention is to provide an electrical connection device for a tank type fuel pump.

[Means for solving problems]

The connecting device according to the invention has a body made of synthetic resin, in which a terminal which is connected or connectable to an external tank cord is at least partially embedded in the form of an insert. One end of this terminal protrudes into the opening of the pump mounting board and can be connected to the terminal of the tank cord. A sealing means such as an O-ring is provided between the main body and the substrate, and the main body is pressed against the substrate by enclosing the substrate with the O-ring compressed by a pressure-bonding means such as a holding plate.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings. The pump mounting board 10 shown in FIG. 1 is installed in the opening of the top wall of a fuel tank (not shown).The mounting method for an in-tank fuel pump is described in the above-mentioned Utility Model Application Publication No. 59-130380. Reference may be made to FIG. 1 of the publication. This substrate 10 is provided with a circular through hole 12.
The connector 14 of the present invention is fixed to the substrate 10 by passing through the connector.

The connector 14 includes a molded main body 16 made of synthetic resin, a terminal 18, and an O-ring 20.
and a presser plate 22. The main body 16 is approximately disk-shaped and has a protrusion 26 extending along the tank outer cord 24. O on the bottom surface of the main body 16
An annular groove 28 for accommodating the ring 20 and an annular groove 30 into which the upper end of the press plate 22 is fitted are formed.

A portion of the external tank cord 24 and a portion of the terminal 18 are embedded within the main body 16. Main body 16 and terminal 1
8, the caulked portion 32 of the terminal 18 is fixed to the end of the cord 24 by caulking, the cord with the terminal is placed in a mold of a molding device, and a synthetic resin material is injected and molded. It can be manufactured by In the illustrated embodiment, the end of the cord 24 is integrally embedded in the main body 16, but the terminal 18 is molded with the caulked part 32 protruding from the main body 16, and then It is also possible to fasten the cord 24.

The terminal 18 is bent into an L-shape, and its lower end projects downward through the through hole 12 at the center of the main body 16. A terminal of an in-tank cord 34 connected to a motor of an in-tank fuel pump can be connected to the protruding end of the terminal 18 by a fixing means such as a screw 38.

The seal between the body 16 and the substrate 10 is an annular groove 2
This is done by means of an O-ring 20 placed within 8.
Fixing and positioning of the main body 16 to the substrate 10 and compression of the O-ring 20 are performed by a presser plate 22 made of synthetic resin or other suitable material. For this reason, the presser plate 22 is provided with a cylindrical portion 40 that can be inserted into the through hole 12, and the upper end of the cylindrical portion 40 is dimensioned to fit into the annular groove 30. In order to compress the O-ring 20 and ensure sealing performance, the depth of the annular groove 28 is set smaller than the diameter of the O-ring in the free state.

It is preferable that the main body 16 and the presser plate 22 be joined by high frequency welding. That is, with a load of approximately 4 kg/cm ² applied between the presser plate 22 and the main body 16,
A joint 42 between the lower surface of the annular groove 30 of the main body 16 and the upper surface of the cylindrical portion 40 of the presser plate 22 is welded using high frequency. Then, with the O-ring 20 compressed, the main body 16 and the presser plate 22 are brought into pressure contact with the substrate 10, and securely clamp the substrate. Alternatively, adhesive or other fixing means may be used instead of high frequency welding.

[Effect of idea]

In the connector of the present invention, the terminal on the side of the cord outside the tank is partially embedded in the main body as an insert of the connector body, and the terminal on the side of the cord inside the tank is made of synthetic resin or the like at the lower end of the terminal that protrudes from the body. The structure allows direct connection without any intervening material. Therefore, even if creep occurs in the synthetic resin main body, the terminal connection portion will not loosen at all, and generation of sparks can be completely prevented.

Further, since the sealing means is arranged in a compressed state between the main body and the substrate, it is possible to reliably seal the gap between the main body and the substrate.

Furthermore, since a part of the terminal on the outside cord side of the tank is embedded within the main body, the structure of the connecting tool is significantly simplified, and the connecting tool can be attached to the board in an extremely simple manner, significantly increasing productivity. improves.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the connecting tool of the present invention mounted on a mounting board, and is a cross-sectional view taken along the - arrow in FIG. 2, and FIG. 2 is a plan view of the connecting tool. 10...Pump mounting board, 12...Through hole in board, 14...Connection tool, 16...Connection tool body,
18...Terminal (tank outside cord side), 20...O
Ring, 22... Pressing plate, 24... Cord outside the tank, 34... Cord inside the tank.

Claims (1)

[Scope of Claim for Utility Model Registration] An electrical connection device for electrically connecting a power source outside the fuel tank to the motor of an in-tank electric fuel pump disposed inside the fuel tank through the fuel tank, the fuel pump Through hole 12 of perforated board 10 for mounting
a main body 16 made of insulating synthetic resin arranged outside the board in alignment with the main body 16; a terminal 18 at least partially embedded in the main body, one end protruding into the through hole of the board;
one whose other end is connectable to a power source; a sealing means 20 disposed between the main body and the substrate for sealing the gap between the two; and a sealing means 20 firmly fixed to the main body, with the sealing means being compressed. means 22 for crimping the body to a substrate.