JPH0850045A - Structure for fastening resistor substrate for fuel sender - Google Patents

Abstract

PURPOSE:To provide a fastening structure, which is constituted so as to hold a resistor board for the sender of a fuel gage for measuring the amount of fuel remaining in the fuel tank of an automobile with the metal terminals of a bracket. CONSTITUTION:A fuel gage 2 comprises a sender 3, which is attached to a wall surface 1a of a fuel tank 1, and a receiver 4, which displays the remaining amount of the measured fuel. The sender 3 has a float 5 for detecting the liquid level of the fuel, a rod 6 for supporting the float 5 and a resistor 7, which converts the turning angle of the rod 6 corresponding to the changing amount of the float 5 into the electric signal. At the upper end of a board 16 of the resistor 7, first and second members 19 and 20, which are conducted to the end parts of a resistor body 17 and a conductor 18, are fixed. The board 16 is pushed in the X direction, and metal terminals 15 are connected to the connecting members 19 and 20. At the same time, the lower end of the board 16 is engaged with an engaging part 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for a fuel sender register board, and more particularly to a connecting structure for contacting a metal terminal to a terminal of a sender register of a fuel gauge for measuring a remaining amount in a fuel tank of an automobile. Regarding the improvement of.

[0002]

2. Description of the Related Art For example, a fuel gauge provided in a fuel tank of an automobile employs a connection structure of a fuel sender register board as disclosed in JP-A-3-431321. In the configuration of this publication, a part of a metal terminal is insert-molded in a synthetic resin bracket, and the end of the metal terminal protruding from the flange of the bracket is formed on the substrate of the sender resistor to contact the conductive pattern. It is designed to let you.

In order to surely make contact with the conductive pattern of the register, the protruding portion of the metal terminal is processed into an inclined state, and the tip portion of the metal terminal is bent in an arc. Therefore, when the substrate of the register is inserted into the cylindrical portion of the bracket, the arcuate tip portion comes into contact with the conductive pattern and the metal terminal is elastically deformed to increase the pressing force against the conductive pattern.

Further, the fuel gauge is mounted in the fuel tank together with the fuel pump, and the vibration generated during the operation of the fuel pump is also propagated to the fuel gauge. Therefore, inside the cylindrical part of the bracket,
In order to prevent the register substrate from vibrating and the measured value of the fuel gauge from becoming inaccurate, a plurality of ribs for holding the register substrate have protruded as locking portions.

[0005]

However, in the above-mentioned conventional structure, since the plurality of ribs for holding the substrate of the register are provided inside the cylindrical portion of the bracket as locking portions, the shape of the bracket becomes complicated. That is, it is difficult to manufacture a molding die and the manufacturing cost is high. Furthermore, since a plurality of ribs for holding the substrate of the register are required, the mounting positions and shapes of other components incorporated in the bracket are limited.

Further, conventionally, the protruding portion of the metal terminal insert-molded on the flange of the bracket is processed to be inclined so as to have a spring property, and the tip portion of the metal terminal is bent into an arc. After the insert molding, the mold releasing direction of the resin molding die is plural, and the die removing operation is complicated accordingly. When the metal terminal is set at a predetermined mounting position in the resin molding die before insert molding, the metal terminal is bent as described above, and therefore the metal terminal is in the resin molding die. It was not stable and the work efficiency before insert molding was low.

Therefore, in view of the above problems, it is an object of the present invention to make it easier to hold a substrate of a register and to improve workability during insert molding of metal terminals.

[0008]

SUMMARY OF THE INVENTION The present invention is made of a metal, which is insert-molded into a synthetic resin bracket on a conductive pattern formed on a substrate of a sender register of a fuel gauge for measuring the remaining amount in a fuel tank. In the connection structure of the fuel sender register board that contacts the terminals,
A connecting member for sandwiching the metal terminal and electrically connecting to the metal terminal is provided on the substrate of the sender resistor.

[0009]

By providing a connecting member for sandwiching a metal terminal and electrically conducting with the metal terminal on the substrate of the sender register, the connecting member sandwiches the metal terminal and holds the sender register. It is possible to simplify the shape of the molding die for the bracket, and to form the metal terminal in a linear shape so as to be inserted into the insertion hole of the connection member.

[0010]

1 to 3 show an embodiment of a connecting structure of a fuel sender register board according to the present invention.

In each figure, a fuel gauge 2 for measuring the remaining amount of a fuel tank 1 of an automobile is a wall surface 1a of the fuel tank 1.
And a receiver 4 for displaying the measured remaining amount of fuel. The sender 3 has a float 5 for detecting the liquid level of the fuel, a rod 6 for supporting the float 5, and a register 7 for converting the rotation angle of the rod 6 according to the variable amount of the float 5 into an electric signal.

The receiver 4 has a pointer driving mechanism (not shown) called a bimetal type or a cross coil type, and is provided in the console of the driver's seat according to the liquid level of the fuel detected by the sender 3. The pointer 9 of the fuel gauge 8 is rotated. Therefore, the driver can confirm the remaining amount of fuel by reading the scale 10 at the rotating position of the pointer 9.

The sender 3 is mounted in the fuel tank 1 together with a fuel pump 11 for supplying the fuel in the fuel tank 1 to a fuel injector (not shown). That is, the sender 3 is housed in the bracket 12 made of synthetic resin that supports the fuel pump 11. The flange 13 of the bracket 12 is fixed to the wall surface 1a of the fuel tank 1 so as to close the mounting hole 1b when the fuel pump 11 and the bracket 12 are inserted into the mounting hole 1b of the fuel tank 1.

In order to prevent the fuel in the fuel tank 1 from evaporating to the outside, a seal member 21 is interposed between the flange 13 and the wall surface 1a of the tank 1. Since the bracket 12 is mounted so as to seal the mounting hole 1b of the fuel tank 1 as described above, the detection signal from the sender 3 is transmitted through the metal terminal 15 insert-molded in the connector 14 of the flange 13 to the fuel. Tank 1
Is output to the receiver 4 provided outside the.

As shown in FIG. 2, the register 7 is a substrate 16
A resistor 17 and a conductor 18 are formed on the upper surface.
The bracket 12 is provided with a mounting portion 12a that rotatably supports one end of the rod 6, and a part of the rod 6 extends so as to cross the resistor 17 and the conductor 18.

The resistor 17 and the conductor 18 are formed in arcuate shapes parallel to each other, and are provided so as to coincide with the turning locus of the rod 6 supporting the float 5.

Further, the rod 6 is provided with a conductor 6a for electrically contacting the resistor 17 and the conductor 18 by slidingly contacting the resistor 17 and the conductor 18. That is, when the rod 6 is rotated by raising and lowering the float 5, the resistance value of the resistor 17 is changed by the conductor 6a according to the rotating position.

Therefore, the voltage value of the detection signal flowing through the resistor 17 and the conductor 18 changes depending on the ascending / descending position of the float 5 and the liquid level of the fuel. The pointer of the fuel gauge is rotated.

Now, the substrate 16 and the connection structure of the register 7 will be described.

On the upper end 16c of the substrate 16, the resistor 1 is provided.
First and second connecting members 19 and 20 are fixed to the end portions of the conductor 7 and the conductor 18, respectively. This connection member 19, 2
0 is formed of a conductive material and is fixed to the substrate 16 by soldering or the like in a direction parallel to the X direction.

As shown in FIG. 3, the connecting members 19, 20 are connected.
Have the same configuration, respectively, and have insertion holes 19a and 20a into which the metal terminals 15 are inserted and insertion holes 19a and 20a, respectively.
Cylindrical fitting parts 19b and 20b having a and insertion hole 19
contact portions 19c, 2 folded back in a U shape in a, 20a
0c and the board 1 protruding from the bottom surface of the fitting portions 19b and 20b.
Fixing pins 19d and 20d fitted in the fixing holes 16a of No. 6
And consists of.

Further, the connecting members 19 and 20 have the insertion holes 19
The a and 20a are fixed to the substrate 16 so as to extend in the X direction that coincides with the extending direction of the metal terminal 15. Moreover, the fixing pins 19d and 20d are fixed to the fixing hole 1 of the substrate 16.
Since it is fitted to 6a, the connecting members 19 and 20 will not fall off even when a force in the X direction and Z direction is applied.

The board mounting portion 12a of the bracket 12 has a mounting portion 22 on which the substrate 16 is mounted, and guide portions 23 and 24 extending in the X direction on both sides of the mounting portion 22 on the inlet side.
And the lower end 16 of the substrate 16 extending in the X direction at the mounting portion 20.
and a locking portion 25 that locks b. The guide portions 23 and 24 project in a crank shape so as to guide both sides of the substrate 16. The locking portion 25 has a claw portion 25a that locks the lower end 16b of the substrate 16.

Therefore, the board 16 has the end portion in the X direction in which the claw portion 25a and the metal terminal 15 are inserted.
9 and 20, the Y direction and the Z direction are between the guide portions 23 and 24 and the locking portion 25, and the connecting members 19 and 20.
Sandwiched between.

Further, since the metal terminal 15 is simply inserted into the insertion holes 19a, 20a of the connecting members 19, 20, there is no need for bending as in the conventional case, and a plate-shaped conductive material extending linearly is used. Therefore, when insert-molding into the terminal holding portion 26 of the bracket 12, it can be easily molded. That is, at the time of molding, the metal terminal 15 can be easily inserted into a predetermined position in the resin molding die, and the efficiency of the molding operation can be improved.

Since the connection structure is as described above, the operation and operation of attaching the register 7 to the mounting portion 22 of the bracket 12 will be described.

First, as shown in FIG. 4, the substrate 16 of the register 7 is inserted between the guide portions 23 and 24 and the locking portion 25. At that time, as shown in FIG. 5, the board 16 is bent in the direction in which the engaging portion 25 is separated from the guide portions 23 and 24 while being pressed in the X direction with the upper end 16c to which the connecting members 19 and 20 are fixed as the head. No

The end portion of the substrate 16 is guided by the guide portion 23,
When it is inserted into the insertion between 24 and the locking portion 25, the substrate 1
6 is slid in the same direction while being guided by the guide portions 23 and 24 extending in the X direction, and the connection members 19 and 20 face the metal terminal 15 protruding from the terminal holding portion 26.

Since the connecting members 19 and 20 are provided with insertion holes 19a and 20a extending in the X direction,
The board 16 is further pressed in the X direction, and the metal terminal 15 is relatively inserted into the insertion holes 19a and 20a. As a result, as shown in FIG. 3, the metal terminal 15 has contact portions 19c, inside the connecting members 19 and 20,
Due to the spring force of 20c, the fitting portions 19b, 20b and the contact portion 1
It is sandwiched between 9c and 20c and electrically connected.

Then, the metal terminal 15 is connected to the connecting member 1.
When completely inserted into the insertion holes 19a, 20a of the 9, 20, the lower end 16b of the substrate 16 has the claw portion 25a of the locking portion 25.
6, the locking portion 25 returns to the guide portions 23 and 24 side, and the claw portion 25a locks the lower end 16b of the substrate 16 as shown in FIG. In this way, the metal terminal 15 is moved to the upper end 16 of the substrate 16 only by pressing the substrate 16 in the X direction.
The lower end 16b of the substrate 16 is locked by the locking portion 25 while being connected to the connecting members 19 and 20 provided in c.

Further, the substrate 16 mounted as described above
The upper end 16c is held by the metal terminal 15 sandwiched inside the connecting members 19 and 20, and the lower end 16b is held by the locking portion 25 and the guide portions 23 and 24. Since a locking member such as a rib for holding is unnecessary, the resin molding die (not shown) for molding the bracket 12 can be easily processed, and the manufacturing cost can be reduced.

Moreover, since the bracket 12 supports the fuel pump 11, the fuel pump 11
The vibration of the fuel pump 11 is propagated to the bracket 12 during the operation of pumping fuel. However, the substrate 16
Since the upper end 16c and the lower end 16b are held by the bracket 12, even if the vibration of the fuel pump 11 propagates to the bracket 12, only the substrate 16 rattles and the conductor 6a provided on the rod 6 and the substrate 16 are provided. The relative positions of the resistor 17 and the conductor 18 are prevented from being displaced, and as a result, it is possible to prevent the voltage value of the detection signal from fluctuating and causing a measurement error.

In the above embodiment, the tubular connecting members 19 and 20 are fixed to the substrate 16, but the present invention is not limited to this, and the point is that the metal terminal 15 can be sandwiched.

In the above embodiment, the substrate 16 is provided with the pair of connecting members 19 and 20, but it is of course possible to provide one or three or more connecting members as will be described later. .

[0035]

As described above, according to the present invention, since the metal terminal is held on the substrate of the sender resistor and the connection member electrically connected to the metal terminal is provided, the connection member is the metal terminal. It is possible to hold the base plate of the sender register by sandwiching the base plate, thereby eliminating the need for a locking member such as a rib for locking the base plate in the bracket. The shape of the bracket molding die can be simplified accordingly, and it becomes possible to form the metal terminals in a straight line so that they can be inserted into the connection member. The molding operation can be easily performed.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a fuel sender register substrate connection structure according to the present invention.

FIG. 2 is a perspective view showing an enlarged main part of the present invention.

FIG. 3 is a vertical cross-sectional view showing a state in which a metal terminal is inserted into a connecting member.

FIG. 4 is a bottom view showing a state where a fuel sender register board is attached to a bracket.

FIG. 5 is a side view showing a process of attaching the fuel sender register board to the bracket.

FIG. 6 is a side view showing a state where a fuel sender register board is attached to a bracket.

[Explanation of symbols]

 1 Fuel Tank 2 Fuel Gauge 3 Sender 4 Receiver 5 Float 7 Register 11 Fuel Pump 12 Bracket 14 Connector 15 Metal Terminal 16 Board 17 Resistor 18 Conductor 19 First Connection Member 20 Second Connection Member 23, 24 Guide Part 25 Locking part

Claims (1)

[Claims] 1. A register for a fuel sender in which a metal terminal formed by insert molding in a bracket made of a synthetic resin is brought into contact with a conductive pattern formed on a substrate of a register for a sender of a fuel gauge for measuring a remaining amount in a fuel tank. In the board connecting structure, a connecting member for sandwiching the metal terminal and electrically connecting with the metal terminal is provided on the board of the sender register, and the connecting structure of the fuel sender register board is provided. .