JPS6219941Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved structure of a liquid level detection device used as a vehicle fuel gauge, for example. This type of device generally has the following features, as shown in Figure 1:
A main body 2 is suspended and fixed in the internal space of the tank 1 via the partition wall of the tank 1, and an electrical insulating member 3 is fixed to the main body 2, and an external power source is connected to the insulating member 3. Resistance wire 4 connected to
is wound into a horizontally long shape.

Further, a U-shaped frame portion 5 is integrally formed in the main body 2, and an L-shaped arm 6 is attached to the frame portion 5.
It is pivoted so that it can rotate within a certain range.
A sliding arm piece 7 made of a plate spring material is connected to one end of the arm 6, and this arm piece 7 is designed to slide on the resistance wire 4 with elastic pressure.
A float 8 that moves up and down as the liquid level increases or decreases is attached to the other end of the arm 6, and this movement causes the arm 6 to rotate around the pivot point with the U-shaped frame 5. In conjunction with this, the sliding arm piece 7 slides on the resistance wire 4 in an arcuate trajectory, so that the amount of fuel in the tank 1 can be electrically detected and displayed in a well-known manner.

As specifically shown in FIG. 2, the attachment of the U-shaped frame portion 5, the arm 6, and the sliding arm piece 7 is as shown in FIG. It is inserted into the opposing wall of the frame part 5 and is pivotally supported, and in this case, a protrusion 11 is formed by press molding on the base that extends from the horizontal side 9 to the vertical side 10 while being curved orthogonally to the horizontal side 9. A washer 12 is inserted through and abuts against this protrusion 11, and is placed on the outer side of the opposing wall of the frame portion 5, and the protruding free end of the horizontal side 9 protruding outward from the other opposing wall is crushed to form a flat portion 13. As a result, the arm 6 is pivotally supported on the frame portion 5 to prevent it from coming off.

The sliding arm piece 7 is located between the opposing walls of the U-shaped frame portion 5 and is fixed to the adjusting member 14.
4 is inserted through the horizontal side 9 of the arm 6 so that it can rotate in the circumferential direction of its axis.

A screw 15 is screwed into the adjusting member 14 in a direction perpendicular to the horizontal side 9, so that the adjusting member 14
is fixed to the horizontal side 9.

That is, in the conventional device described above, the washer 12 is inserted into the horizontal side 9 of the arm 6 and locked at the protrusion 11, and the horizontal side 9 is penetrated from the free end of the horizontal side 9 from one outside of the opposite wall of the U-shaped frame portion 5. After inserting the adjusting member 14 with the sliding arm piece 7 fixed in advance between the opposing walls, the flat portion 13 is formed by crushing the free end of the opposing wall that protrudes to the outside. The work is complicated, and the small parts must be handled and assembled in restricted positions, further reducing the workability. Further, the adjusting member 14 rotates in the axial direction of the horizontal side 9, so that the sliding arm piece 7 moves over the resistance line 4 within a set range corresponding to the operating range of the float 8 attached to the vertical side 10. Since the adjustment member 14 is adjusted to slide on the horizontal side 9 by tightening the screw 15 after this adjustment, the adjustment work must be dependent on the screw 15 each time. This is a cumbersome task in that the work must be done in a narrow space between the opposing walls of the U-shaped frame 5, and in this case, the sliding arm piece 7 must be touched directly with the hand to adjust its rotation. arm piece 7
There is a risk that the contact pressure to the resistance wire 4 will change due to the deformation of the wire, and at the same time there is a fear that this electric line may be contaminated.

The present invention focuses on and attempts to solve the above problem, and one embodiment of the present invention will be described in detail below with reference to FIGS. 3 and 4 of the accompanying drawings.

The ring 16 has a plurality of claws 17 integrally protruding from its outer periphery.

The retainer 18 integrally has a cylindrical portion 21 projecting from the middle of the disk-shaped portion 19 with an arcuate surface 20 and tapering toward the tip.

The sliding arm piece 70 made of a leaf spring material has a disk-shaped portion 71 formed at its base, and a hole 7 in the center of the portion 71.
2 is formed.

A sliding arm piece 70 is inserted into the cylindrical portion 21 of the retainer 18 through a hole 72 thereof.

The ring 16 is the disc-shaped portion 1 of the retainer 18.
9, and the claw portion 17 of the ring 16 is in close contact with the portion 1.
9 and is bent and crimped from the outer circumferential surface of the disc-shaped portion 71 of the sliding arm piece 70, and in this case, the circle of the retainer 18 is bent by the claw portion 17 of the ring 16. The disc-shaped portion 71 of the sliding arm piece 70 is pressed against the retainer 1 by the pressure applied to the plate-shaped portion 19.
8, the sliding arm piece 70 deforms against its own elasticity and comes into close contact with the disc-shaped portion 19 of the retainer 18.
When a constant force is applied to both rings 6 and 6, the claw portion 17 of the ring 16 can rotate along the outer peripheral surface of the disc-shaped portion 19 of the retainer 18. L
The horizontal side 90 of the letter-shaped arm 60 penetrates the U-shaped frame portion 50 of the main body 22 and is pivotally supported so that the free end of the horizontal side 90 projects to the outside of the opposite wall of the frame portion 50. Attach the above ring 1 to the protruding free end in advance.
6, the retainer 18 supporting the sliding arm piece 70 is press-fitted and fixed, so that the arm 60 is attached to the horizontal side 90.
The base end protrusion 11 and washer 12 are both pivotally supported by the U-shaped frame portion 50 to prevent them from coming off. Then, by rotating the ring 16 with respect to the retainer 18 from this state, the sliding arm piece 70 is rotated by the claw portion 17 of the ring 16, and the operating range on the resistance line 40 is adjusted.

That is, after the horizontal side 90 of the L-shaped arm 60 is inserted and pivoted into the U-shaped frame portion 50 of the main body 22, the retainer 18 supports the sliding arm piece 70 with the ring 16.
By press-fitting and fixing the arm 60 to the free end of the horizontal piece 90, the arm 60 can be pivotally supported to the frame part 50 so as not to come off, and by rotating the claw part 17 of the ring 16, the sliding arm piece There is an advantage that the operating range of the sliding arm piece 70 can be adjusted, and in this case, the sliding arm piece 70 is
can be attached to the retainer 18 together with the ring 16, and the sliding arm piece 70 can be adjusted from the outside of the opposing wall of the U-shaped frame 50 via the ring 16, improving assembly work efficiency. Moreover, since it is possible to avoid directly touching the sliding arm piece 70 to adjust the rotation, the contact pressure with the resistance wire 40 due to deformation of the arm piece 70 does not change, and contamination of the electric line is also prevented. can.

Further, the disc-shaped portion 71 of the sliding arm piece 70 inserted into the cylindrical portion 21 of the retainer 18 is connected to the cylindrical portion 2
1 Along the arc surface 20 of the base, the claw part 17 of the ring 16
Since the sliding arm piece 70 is elastically deformed and supported by the pressure applied by the retainer 18, it is possible to stably support the sliding arm piece 70 on the retainer 18, and it is also possible to prevent the sliding arm piece 70 from changing its position due to the application of vibration or the like.

Therefore, according to the present invention, it is possible to easily assemble and adjust the device, and to ensure that the device functions properly.

[Brief explanation of the drawing]

Figure 1 is a front view of the main parts of the conventional device, and Figure 2 is the front view of the main parts of the conventional device.
3 is a side sectional view of the main part of the present device, and FIG. 4 is an enlarged exploded perspective view of the main part of FIG. 3. 2, 22...Main body, 4,40...Resistance wire, 5,
50... U-shaped frame portion, 6, 60... Arm, 7,
70...Sliding arm piece 8...Float, 9,90...
Horizontal side, 16...Ring, 17...Claw part, 18...
... Retainer, 19 ... Disc-shaped portion, 20 ... Arc surface, 72 ... Hole, 21 ... Cylindrical portion.

Claims (1)

[Scope of utility model registration request] The vertical movement of the float that responds to increases and decreases in the liquid level is converted into rotational movement within a certain angle range of the arm connected to the float, and the sliding movement on the resistance line of the sliding arm that connects to the arm and responds. In a liquid level detection device that electrically detects the liquid level, the horizontal side of the arm formed in an L shape is inserted through the opposing wall of the U-shaped frame formed in the main body that holds the resistance wire. a ring which is pivotally fixed and has a free end of the horizontal side protruding to the outside of the opposing wall, and has a claw protruding around the periphery which is rotatably inserted into the horizontal side from the free end; A retainer having a cylindrical portion that tapers with an arcuate surface protrudes from the middle of the portion and is press-fitted and fixed to the horizontal side, and the cylindrical portion of the retainer is inserted into a hole provided at the base to form a claw portion of the ring. a sliding arm piece that is bent and crimped from the outer periphery of the base across the outer periphery of the disc-shaped portion to the base, and elastically crimped to the disc-shaped portion along the arcuate surface; Liquid level detection device with.