JPH10281855A - Float type level gage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an accuracy by accurately setting sizes of upper surface and lower end face of a cap, bringing a terminal end of a read switch in collision contact with a lower end face of the cap, and setting the switch to the upper surface of the cap. SOLUTION: A cap 16 for embedding a terminal 17 blocks an upper end of a housing 16. A read switch 19 is arranged in the housing 16, fixed to the end of the terminal 17, and a terminal 19a is merely brought into contact with the lower end face 18b of a cap 18, and hence fixed to an accurate height position to the upper surface of the cap 18. A float 20 is fixed at its top with a magnet 21, and movably engaged with the outer periphery of a small-diameter housing part 16b containing the switch 19. Now, when a liquid level drops from the state that the float 20 is raised and the switch 19 is opened and the float 20 drops, the switch 19 is closed by the magnet 21 to generate a signal. Since the switch 19 to be closed is accurately set at its height position, its accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a float type liquid level gauge which emits a signal when a liquid level reaches a predetermined height, and is particularly used for a fuel tank of an automobile or a motorcycle.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 3, for example, a lead switch 7 soldered to both ends of a lead wire 6 in advance is inserted into a hollow portion 5a of a housing 5, and an adhesive sealing material 8 is sealed thereafter. The height position of the switch 7 was fixed. A float 10 having a magnet 9 is loosely fitted to the small diameter portion at the lower end of the housing 5. A stopper 11 is provided at the lowermost end of the housing 5.
Are fixed to prevent the float 10 from falling.

As another conventional example, a reed switch 7 is disposed inside a housing 5 as shown in FIG.
The reed switch 7 is held by a cap 13 through which a terminal 12 is inserted. One of the terminals of the reed switch 7 is soldered to the terminal 12 at two points A and B via wires 14. An insulating tube 15 is inserted through the wire 14.
Further, the terminal at the other end of the reed switch 7 is a terminal 1
2 is directly soldered at point C. A float 10 having a magnet 9 is provided at the small diameter portion at the lower end of the housing 5.
Is loosely fitted.

[0004]

However, as described above, the conventional float type liquid level meter shown in FIG. 3 requires a large number of man-hours and requires a lot of time to accurately fix the height position of the reed switch. Needed. Further, there is a disadvantage that the cost of the adhesive sealing material is high. Further, the conventional example shown in FIG. 4 is proposed to improve the conventional example shown in FIG. 3, but the soldering points are A, B and C, and the number of work steps is increased. ing. In addition, there are disadvantages that the number of parts is large, the cost is high, and the positional accuracy of the reed switch is not improved.

SUMMARY OF THE INVENTION An object of the present invention is to provide a float-type liquid level gauge capable of reducing the number of man-hours and improving the accuracy in view of the above-mentioned conventional problems.

[0006]

In order to achieve the above object, a float type liquid level gauge according to the present invention comprises a hollow housing, a cap which closes an upper end opening of the housing and has a terminal embedded therein. A reed switch fixed to the distal end of the terminal and disposed inside the housing, a float loosely fitted on the outer periphery of the housing portion in which the reed switch is built, and fixed to the top of the float. It consists of a magnet, is configured so that the dimensions of the upper surface and lower end surface of the cap are accurately set, and the position of the reed switch with respect to the upper surface of the cap can be set by abutting the terminal end of the reed switch against the lower end surface of the cap. It is characterized by having.

[0007] The terminal of the reed switch is accurately set to a predetermined length. Further, the terminal of the terminal is formed so that the terminal of the reed switch can be inserted therethrough.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a float type liquid level meter according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing a use state of the float type liquid level meter. here,
The float type liquid level gauge includes a hollow housing 16, a cap 18 that closes an upper end opening 16 a of the housing 16 and has a terminal 17 embedded therein, and is fixed to a tip end of the terminal 17. It comprises a reed switch 19 provided inside, a float 20 loosely fitted on the outer periphery of a small diameter housing portion 16b in which the reed switch 19 is built, and a magnet 21 fixed to the top of the float 20. Have been.

The housing 16 has a hollow cylindrical shape, and is configured such that the cap 18 is fitted into the opening 16a. When both are fitted, the upper surface of the cap 18 and the top surface of the housing 16 are formed to be the same reference surface.

The upper surface 18a and the lower end surface 18b of the cap 18
And dimensions are set accurately. The cap 18 has two terminals 17a and 17b having different lower end positions.
Is inserted. The terminal 17a has a long U-shaped groove 24 having a long tip end to which the terminal 19a below the reed switch 19 can be attached. Terminal 17
b has a short end, and is formed with an annular ring 23 through which the terminal 19a above the reed switch 19 can be inserted (see FIG. 3).

The reed switch 19 has terminals 19a having a fixed length at both ends. A stopper 22 is attached to the lower end of the small-diameter housing portion 16b to prevent the float 20 from dropping.

Next, the procedure for assembling the float-type liquid level meter configured as described above will be described. First, after the float 20 is inserted through the small diameter housing portion 16b of the housing 16, the stopper 22 is fixed to the lowermost end.

The terminal 19a of the reed switch 19 is attached to the lower end surface 18b of the cap 18 to which the terminal 17 is attached.
Abut. At this time, the terminal 19a is connected to the terminal 17b.
Is inserted in the ring 23 of the above. At the same time, the tip of the upper terminal 19a is brought into contact with the lower end face 18b of the cap, and at the same time, the lower terminal 19a is inserted into the U-shaped groove 24 and soldered to fix the reed switch 19 to the cap 18.

Thereafter, the cap 18 is fitted into the opening 16a of the housing 16. The reed switch 19 is fixed at an accurate height position with respect to the upper surface of the cap 18 only by contacting the lower end surface 18b of the cap 18, so that the reed switch 19 can be easily held and fixed. Further, since only two soldering locations are required, the number of working steps can be reduced.

FIG. 2 shows a state in which the float 20 has risen and the reed switch 19 has been turned off. When the liquid level drops and the float 20 drops from such a state, the reed switch 19 is turned ON by the magnet 21 to generate a signal. Since the height position of the reed switch 19 which is turned ON can be accurately set, the performance can be improved. As described above, the float type liquid level gauge of the present invention can provide a product of stable quality without a skilled operator.

The present invention is not limited to the above-described embodiment, and various design changes can be made based on the technical concept of the present invention.

[0017]

As described above, according to the float type liquid level gauge of the present invention, a hollow housing, a cap for closing an upper end opening of the housing and having a terminal embedded therein, and a tip end of the terminal are provided. And a reed switch disposed inside the housing, a float loosely fitted on an outer periphery of a housing portion in which the reed switch is built, and a magnet fixed to a top of the float, Since the dimensions of the upper surface and the lower end surface of the cap are set accurately, and the terminal end of the reed switch abuts against the lower end surface of the cap, the position of the reed switch with respect to the upper surface of the cap can be set. The reed switch is directly fixed to the two terminals by soldering or the like, and one end of the terminal is brought into contact with the point A to determine the position. It is possible to hold a degree. In addition, even if a skilled worker is not used, there is no variation in quality, and the performance can be improved. Further, the cost can be reduced by reducing the number of work steps and the number of parts.

Since the terminal of the terminal is formed so that the terminal of the reed switch can be inserted, the terminal can be soldered while inserting the terminal into the terminal of the terminal, and the fixing work of the reed switch is easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a float type liquid level meter according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a use state of the float type liquid level gauge.

FIG. 3 is a perspective view of a main part of the float type liquid level gauge.

FIG. 4 is a longitudinal sectional view showing an example of a conventional float type liquid level meter.

FIG. 5 is a longitudinal sectional view showing another example of a conventional float type liquid level gauge.

[Explanation of symbols]

 Reference Signs List 5 housing 5a hollow portion 6 lead wire 7 lead switch 8 adhesive seal material 9 magnet 10 float 11 stopper 12 terminal 13 cap 14 wire 15 insulating tube 16 housing 16a opening 16b small-diameter housing portion 17 terminal 18 cap 18a upper surface 18b lower end surface 19 Reed switch 19a Terminal 20 Float 21 Magnet 22 Stopper 23 Ring 24 U-shaped groove

Claims (3)

[Claims] 1. A hollow housing, a cap that closes an upper end opening of the housing and has a terminal embedded therein, a reed switch fixed to a distal end of the terminal, and disposed inside the housing. A float that is loosely fitted on the outer periphery of the housing part in which the reed switch is built, and a magnet that is fixed to the top of the float, and that the dimensions of the upper surface and the lower end surface of the cap are accurately set, A float type liquid level meter characterized in that a position of a reed switch with respect to an upper surface of a cap can be set by abutting a terminal end of a switch against a lower end surface of the cap. 2. The float type liquid level gauge according to claim 1, wherein the terminals of the reed switch are accurately set to a predetermined length. 3. The float type liquid level gauge according to claim 1, wherein the terminal of the terminal is formed so that the terminal of the reed switch can be inserted therethrough.