JPH05912U - Oil level sensor device - Google Patents

Abstract

(57) [Abstract] [Purpose] Highly reliable oil level sensor device. [Structure] A movable contact protruding from the float, a fixed contact corresponding to the movable contact at a position below the movable contact, and a lead wire and a fixed contact between the movable contact and the fixed contact. And a power supply circuit connected through a continuity display means. [Effect] There is an effect that periodic cleaning for removing iron powder is not necessary, the structure of the float switch is simplified, and the number of parts constituting the float switch is reduced. Therefore, these can reduce the manufacturing cost and the incidence of defects.

Description

[Detailed description of the device]

[0001]   The present invention relates to an oil level sensor device, particularly an oil used in a general-purpose engine. The present invention relates to a level sensor device.

[0002]

[Prior art]

  A conventional oil level sensor device will be described with reference to FIGS. In Figure 5 Reference numeral 10 indicates an engine body. In the lower part of this engine body 10, , An oil pan 11 for retaining the engine oil 18 is provided, and a certain amount of engine The oil 18 is filled. This engine oil 18 It plays important roles such as lubrication, cooling and cleaning of engine moving parts during engine operation. Therefore, when the engine is operated with insufficient engine oil 18, There is a risk of causing problems with the computer. In addition, the engine oil 18 Is gradually consumed and the amount of oil decreases, so the position of the oil level is detected and oil shortage is detected. The float switch 15 is installed on the bottom of the oil pan so that it will not come. ing.

[0003]   FIG. 6 shows a partial view of a conventional float switch. This float switch The chi 15 is made of a donut-shaped float 13 and a cylindrical non-magnetic member in the inner space. The movable part formed by inserting the switch storage tube 16 inside the cylindrical rib 12 It is formed by being housed in the empty portion 12a. And on the donut-shaped float 13 A ring-shaped magnet 14 is attached to the inner diameter surface of the part, and a cylindrical magnet facing the magnet 14 The switch housing tube 16 is connected with a lead wire 17a from the outside of the oil pan. A reed switch 17 is provided.

[0004]   In FIG. 7, the movement of the float switch 15 of the above conventional example will be described. When the oil level 18a is above the specified level, the float 13 floats upward and the switch is stored. It contacts the stopper 16a above the tube 16 and stays there. And the oil is reduced When the oil level 18a drops below the specified level, the float 13 descends with the oil level. The magnet 14 mounted on the float 13 and the lead wire inside the switch storage tube 16. Itch 17 and the same position. At this time, the reed switch is driven by the magnetic force of the magnet 14. When 17 is closed, a circuit is formed and a signal is detected outside. .

[0005]

[Problems to be solved by the device]

  However, in the above conventional example, the number of parts that make up the float switch However, the manufacturing cost was high. Also, opening and closing the reed switch 17 Is performed by an indirect method using magnetic force, and due to the large number of components described above, There was a problem that the rate of good quality was high. In addition, it has a magnet on the float Therefore, the iron powder mixed in the engine oil is attracted to this magnet and the magnetic force There is also a problem that cleaning such as iron powder removal is necessary to weaken the noise.

[0006]

[The purpose of the device]

  The object of the present invention is to improve the inconvenience of the conventional example, and particularly to reduce the defective rate of the device. Highly reliable oil level sensor device that requires few maintenance such as cleaning The purpose is to provide.

[0007]

[Means for Solving the Problems]

  The movable contact protruding from the float and the lower part of the movable contact corresponding to this movable contact Between the fixed contact distributed in the position and this movable contact and fixed contact, each lead wire And a power supply circuit connected through the continuity display means. Is taking. These are intended to achieve the above-mentioned object.

[0008]

[Action]

  Electrodes protruding downward on the lower end surface of the float that moves up and down according to the oil level However, it may come into contact with or separate from the fixed contact provided below facing the electrode by moving the oil surface up and down. When.

[0009]

[First embodiment]   Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. Figure 1 Smell Reference numeral 10 indicates an engine body. At the bottom of this engine body 10, The oil pan 11 holds the engine oil 8 and keeps a certain amount of engine oil. It is to be filled with le 8. And of the oil level of this engine oil 8 A float switch 7 for detecting the position is provided in the lower portion of the oil pan. In FIG. 2, the float switch 7 has a groove 4b and is integral with the oil pan wall. It is configured to be housed in the inner space 4a of the cylindrical rib 4 formed as a unit. Also, A long plate-shaped stopper fitting 5 is screwed and locked on the upper portion of the rib 4, so that the float 1 It is configured so that it does not come out of the inner space of the rib 4 when it rises.

[0010]   In FIG. 3, the float part of the float switch 7 is shown. This float part A disk-shaped float 1 having a thickness, and the bottom end surface of the float 1 protruding downward. And a fixed contact 3 provided below and facing the electrode 2. It In addition, at the upper part of the float, The wire 6 is connected to the electrode 2 below the float.

[0011]   The operation of the above embodiment will be described with reference to FIG. Oil surface 8a is above the specified level At the time of float, the float 1 floats upward and is locked to the upper part of the rib 4 with a long plate-shaped stopper metal. It is in contact with the tool 5 and stays there. When the oil level 8a decreases below the specified level , The float 1 descends along with the oil level while being guided by the inner wall surface of the rib 4, and the float 1 The electrode 2 projecting on the lower surface of the and the fixed contact 3 provided below and facing the electrode are in contact with each other. When touched, the display circuit (not shown) connected to the power supply circuit (not shown) is formed. Is generated and a signal is detected outside. This reduces the oil level inside the engine. Smallness will be perceived.

[0012]

[Effect of device]

  As described above, according to the present invention, the movable contact protruding from the float and the movable contact The fixed contact, which is distributed below the movable contact corresponding to the contact, and the movable contact An electric cable connected to the fixed contact via each lead wire and continuity display means. Since it is formed with the source circuit, etc., the float switch Opening and closing is not done by the indirect method by magnetic force like the conventional example, but directly by the top and bottom of the oil level. Since the switch is opened and closed by the movement of the float that moves up and down. No cleaning is required to remove dust, and the structure of the float switch is simplified and configured This has the effect of reducing the number of parts used. Therefore, the manufacturing cost and An unprecedented practical oil level sensor device that can reduce the incidence of defects Can be provided.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first embodiment of the present invention.

FIG. 2 is a top view of the float switch section in FIG.

FIG. 3 is an explanatory view showing a part of a float switch section in FIG.

FIG. 4 is an explanatory view showing the operation of the float switch section in FIG.

FIG. 5 is an explanatory view showing a conventional example.

6 is a side view of the float switch portion in FIG.

FIG. 7 is an explanatory view showing the operation of the float switch section in FIG.

[Explanation of symbols]

1 float 2 movable contacts 3 fixed contacts 6 Lead wire as lead wire 8 oil level 9 Oil level sensor device 10 engine body 11 oil pan

Claims (2)

[Scope of utility model registration request] 1. A float that is installed in an oil pan under a main body of the engine and that moves up and down according to the vertical direction of the oil level, and an oil level that outputs an oil level signal of a predetermined level when the float descends to a predetermined position. In an oil level sensor device provided with a signal output means, the oil level signal output means is provided at a movable contact projecting from the float and at a position below the movable contact corresponding to the movable contact. Fixed contact,
An oil level sensor device comprising a power supply circuit connected between the movable contact and the fixed contact via each lead wire and a continuity display means. 2. The oil level sensor device, wherein the movable contact is provided on a lower end surface of the float so as to protrude downward.