JPH0313699Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention particularly relates to a mounting device for a liquid level detector in a washing tank of an automobile.

[Background of the idea]

One type of conventional liquid level detector mounting device is one shown in FIG. 5, for example. The liquid level detector 1 closes a circuit when a float 4 that is installed on the bottom of the washer tank 2 and operates to follow the liquid level of the cleaning liquid 3 in the washer tank 2 approaches a magnet 5 that is buried in the float 4. It also has a reed switch 7 installed in a guide cylinder 6 that supports the float 4 so as to be movable up and down, and the reed switch 7 is closed by the magnet 5 inside the float which descends as the liquid level falls. Then, a warning light (not shown) is turned on via the terminal 8 and lead wire 9. Note that 10 is a breakwater cylinder, and 11 and 12 are communication holes.

In order to attach the liquid level detector 1 configured in this way to the wash tank 2, the liquid level detector is inserted into the through hole 13 drilled in the bottom of the wash tank 2 through a packing 14 for maintaining watertightness. 1 is press-fitted and held, but the breakwater tube 10 of the liquid level detector 1 is formed with a rib 15 and a flange 16 to ensure engagement with the gasket 14. Note that the terminal 17 is engaged with a protrusion 18 provided on the lower edge of the breakwater tube 10 and has the terminal 8 inside.
This is the connector that is attached.

However, in the case of such a conventional liquid level detector mounting device, a packing 14 is fitted into a through hole 13 provided on the bottom of the tank 2, and a breakwater for the liquid level detector 1 is inserted into the packing 14. Press fit the cylinder and insert the rib 1
5 and a flange 16, the outer diameter of the rib 15 is smaller than the inner diameter of the through hole 13, and the difference between the outer diameter of the rib 15 and the inner diameter of the packing 14 is small. Therefore, for example, when the cleaning liquid 3 filled in the tank 2 freezes and expands and the tank 2 is deformed, the liquid level detector 1 held in the tank 2 is tilted, and as a result, the liquid level detector 1 formed in the breakwater cylinder 10 is tilted. There was a problem in that the locking force between the rib 15 and the gasket 14 was loosened, and the gasket 12 came off from the through hole 13, causing the liquid level detector 1 to fall out of the tank 2.

[Purpose of invention]

The present invention was developed in view of these conventional problems, and includes a roughly oval-shaped collar that can be engaged with a groove provided at the edge of the liquid level detector mounting hole in the tank. It is an object of the present invention to provide a liquid level detector mounting device that can firmly and reliably hold the liquid level detector and the tank together by the engagement between the collar and the groove.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIGS. 1 to 4. The same parts between the structure of this embodiment and the structure shown in the conventional example are designated by the reference numerals cited in the conventional example. A description of the structure of this embodiment will be omitted.

20 is a protrusion formed integrally with the tank 2 along the parting line 21 during blow molding of the tank 2, and a clamping plate 23 is formed on this protrusion 20 via a thin hinge 22. ing. Further, a fixing plate 25 is integrally formed on one side edge of the clamping plate 23 via a thin hinge 24. When the clamping plate 23 is tilted down to the bottom side of the tank 2 using the thin hinge 22 as a fulcrum, it is loosely fitted into the clamping plate 23, avoiding the connector 17 part.
A through hole 26 capable of holding the flange 16 is formed, and a protrusion 27 for reinforcing and pressing the flange 16 is formed near the edge of the through hole 26. In addition, the fixing plate 25 has a through hole 2.
A welding protrusion 29 protruding from the side surface of the tank 2 is fitted into the through hole 28 .

The structure of this embodiment has been described above. Next, to describe its function, first, the liquid level detector 1 is attached to the washer tank 2. The liquid level detector 1 is attached to the washer tank 2 in the same manner as the conventional means. The liquid level detector 1 is press-fitted into a mounting hole formed in the bottom of the washer tank 2 via a gasket 14 for maintaining watertightness (see FIG. 4). Next, the holding plate 23 erected on the bottom of the tank 2 is tilted 90 degrees with the thin hinge 22 as a boundary, and the protrusion 27 is pressed against the flange 16 surface of the liquid level detector 1. is bent 90 degrees with the thin hinge 24 as a boundary, and the welding protrusion 29 is inserted into the through hole 28. Next, the tip of the welding protrusion 29 penetrated through the through hole 28 is melted by heating and crimped, so that the flange 16 of the liquid level detector 1 is pressed by the clamping plate 23 and is connected to the fixing plate 25 and the welding protrusion. Due to the caulking action of the clamping plate 2
3 maintains the pressurized clamping state of the flange 16, and as a result, it is possible to increase and secure the locking force between the tank 2 and the liquid level detector 1, so that the tank 2 is prevented from being deformed due to freezing of the liquid inside. Even if the liquid level detector 1 falls out of the tank 2, problems such as the liquid level detector 1 falling out from the tank 2 can be solved. Furthermore, according to this embodiment, the protrusion 20, the clamping plate 23, which is formed integrally with the tank 2,
Since the fixing plate 25 is formed on the parting line 21 when the tank 2 is blow-molded, there is an advantage that the protrusions, clamping plates, fixing plate, etc. can be integrally formed when the tank 2 is blow-molded.

[Summary of the idea]

As described above, the present invention has a structure in which a magnet 5 is attached to the outer periphery of a cylinder 6 installed vertically in a liquid tank 2, which moves up and down according to fluctuations in the liquid level of the liquid 3 in the tank. The float 4 is attached to be movable up and down, and a magnetic field detection element 7 that detects the magnetic field of the magnet 5 and generates a signal is provided in the cylinder 6, and the level of the liquid surface is detected by the signal from the magnetic field detection element 7. A flange 16 is integrally provided at the lower end of the tube 6 of the liquid level detector, and an elastic packing 14 that is in contact with the upper surface of the flange 16 is attached to attach the tube 6 to the bottom of the liquid tank 2. A protrusion 20 is press-fitted into the provided through hole 13 and is further attached to the liquid tank 2 along the forming parting line, a clamping plate 23 continuous to the protrusion 20 via a thin hinge 22, and the clamping plate 23. A fixing plate 25 is integrally provided with a fixing plate 25 continuous to the liquid tank via a thin hinge 24 and having a fixing portion to the liquid tank, and when the fixing plate 25 is fixed to the liquid tank 2, the clamping plate 23 holds the flange 16. This is a liquid level detector mounting device characterized by being designed to be clamped.

[Effect of idea]

Therefore, according to this liquid level detector mounting device, the flange 16 of the liquid level detector 1 can be pressed and held against the bottom surface of the tank 2 by the clamping plate 23, so that the liquid level detector 1 and The holding force of the connection with the tank 2 is increased, and as a result, even if the tank is deformed due to freezing of the liquid inside, the liquid level detector 1 can
This has the effect of eliminating problems such as falling off from the tank 2. Furthermore, according to the present invention, the protrusion 20, the clamping plate 23, and the fixing plate 25, which are formed integrally with the tank 2, are formed on the parting line 21 during blow molding of the tank 2.
There is also an advantage that the above-mentioned protrusions, clamping plates, fixing plates, etc. can be integrally formed when the tank 2 is blow-molded.

[Brief explanation of the drawing]

Fig. 1 is a bottom view showing an embodiment of the liquid level detector mounting device according to the present invention, Fig. 2 is an explanatory cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view taken along the - line in Fig. 1. FIG. 4 is an explanatory diagram of the initial operation of the mounting device in the above embodiment, and FIG. 5 is a sectional view showing the conventional mounting device. 1...liquid level detector, 2...tank, 3...liquid,
4...Float, 5...Magnet, 6...Guide tube, 7...Reed switch, 8...Terminal, 9...
... Lead wire, 10 ... Breaker tube, 11, 12 ... Communication hole, 13 ... Through hole, 14 ... Packing, 15 ...
...rib, 16...flange, 17...connector,
18...Protrusion, 20...Protrusion, 21...Parting line, 22...Thin hinge, 23...Holding plate, 24...Thin hinge, 25...Fixing plate, 26
...Through hole, 27...Protrusion, 28...Through hole.

Claims (1)

[Scope of utility model registration request] A float 4, which moves up and down according to fluctuations in the liquid level of the liquid 3 in the tank and has a magnet 5 attached thereto, is attached to the outer periphery of a cylinder 6 installed vertically in the liquid tank 2 so as to be able to move up and down. , a liquid level detector in which a magnetic field detecting element 7 for detecting the magnetic field of the magnet 5 and emitting a signal is provided in the cylinder 6, and the level of the liquid level is detected by the signal from the magnetic field detecting element 7. A flange 16 is integrally provided at the lower end of the cylinder 6, an elastic packing 14 is attached to the upper surface of the flange 16, and the cylinder 6 is press-fitted into the through hole 13 provided at the bottom of the liquid tank 2. , furthermore, a protrusion 20 is attached to the liquid tank 2 along the forming parting line, a clamping plate 23 is continuous to the protrusion 20 via a thin hinge 22, and a clamping plate 23 is continuous to the clamping plate 23 via a thin hinge 24. Further, a fixing plate 25 having a fixing portion to the liquid tank is integrally provided, and when the fixing plate 25 is fixed to the liquid tank 2, the clamping plate 23 clamps the flange 16. Mounting device for liquid level detector.