JP3369711B2 - Oil level gauge and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil level gauge in an internal combustion engine such as an automobile engine.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram showing an oil level gauge in a generally known automobile engine in use. This oil level gauge 1 is composed of a gauge body 2 made of metal and a handle member 3 fixedly attached to the base end portion of the gauge body 2. As shown in FIG. It is attached to the tip of the gauge body 2 by inserting it into the oil 6 in the crankcase 5a through the guide pipe 5b opening to the crankcase 5a, and pulling out the gauge body 2 while holding the handle member 3 at the time of measurement. The oil 6 is read from an index (mark) attached to the gauge body 2 and used to measure the remaining amount of the oil 6 and the degree of contamination.

For fixing the gauge body 2 and the handle member 3 to each other, a method of inserting the base portion of the gauge body 2 and integrating them when the handle member 3 is molded is generally used.

[0004]

As described above, in the conventional oil level gauge, as a method of integrating the gauge body 2 and the handle member 3, the base portion of the gauge body 2 is formed when the handle member 3 is molded. Although the method of inserting is adopted, this method complicates the molding die and raises the cost, and it is necessary to set the gauge main body 2 in the molding die each time, so it is difficult to fully automate, and for this reason It is also a cause of increasing costs. In addition, at the time of insert molding, insufficient filling of the resin material around the base of the gauge main body 2 may occur and the adhesiveness may deteriorate, and the gauge main body 2 may come off from the handle member 3. There was a problem.

The present invention has been made in view of the above problems, and an object thereof is to reduce the cost and to make it at a low cost, and to prevent the gauge body and the handle member from falling off and to have excellent reliability. An object is to provide an oil level gauge and a manufacturing method thereof. Furthermore, other purposes will be clarified one after another in the content described below.

[0006]

In order to solve the problem] was to achieve the above purpose
The present invention because the first aspect, a metal gauge body which is inserted into the oil in the crankcase through a guide pipe which opens into the crankcase, the guide pipe is provided fixed to the base of the gauge body with the manufacturing method of the oil level gauge and a resin handle member to be press-fitted, provided with a hole base of the gauge body is inserted into the handle member, the base of the gauge body
Cut and raise upward diagonally opposite to the insertion direction.
Rubbed cut-out part and diagonally below, also opposite to the insertion direction
With a cut-and-raised part that is cut and raised toward one side, and
Placed in the electromagnetic induction device with the base inserted,
The base in the hole by electromagnetic induction of the electromagnetic induction device
It was heated, with said the melted portion of the handle member which is in contact with the base portion is fixed between the handle member and the base one
It is characterized by embodying. The invention of claim 2
Is specified as a product made by the above manufacturing method,
Through the guide pipe that opens to the crankcase,
A metal game that is inserted into the oil in the rank case
It is fixed to the main body and the base of this gauge main body.
A resin handle member that is press-fitted into the guide pipe is provided.
In the oil level gauge, the handle and
The main body and the package are fixed by the manufacturing method according to claim 1.
It is characterized by.

[0007]

According to this structure, in the hole into which the base portion of the gauge body is inserted, a part of the handle member that is in contact with the base portion is melted, and this melting causes a gap between the base portion and the handle member. Will be fixed directly, so more reliable fixation can be obtained. Further, since the gauge main body and the handle member can be fixed after they are separately molded, the structure of the mold for molding the handle member and the entire apparatus can be simplified.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 is a side view of an oil level cage shown as an embodiment of the present invention. Incidentally, FIG. 4 to that denoted by the same reference numerals denote the identical to the FIG. 4 in FIG.

In FIG. 2 , this oil level gauge 1
Is composed of a metal gauge body 2 and a handle member 3 fixedly attached to the base end portion of the gauge body 2, and its basic configuration is the same as that of a conventional oil level gauge, The usage method is also the same as the conventional oil level gauge. The difference from the above-described conventional oil level gauge lies in the fixed portion between the gauge body 2 and the handle member 3.

This structure will be further described in order from the manufacturing process with reference to FIGS. 2 and 1. In this oil level gauge 1, a metal gauge body 2 and a resin handle member 3 are provided.
And are made separately. Further, when the handle member 3 is molded, a hole 4 for inserting the base portion of the cage body 2 in a press-fitted state is provided on one end side of the handle member 3 (see FIG. 3 ). In this embodiment, the thickness of the gauge body 2 and the width of the hole 4 are about 0.6 mm.

Next, the base portion of the gauge body 2 is press-fitted into the hole 4 of the molded handle member 3 and, in this state, it is placed in the electromagnetic induction device 10 as shown in FIG.

The electromagnetic induction device 10 is composed of a coil portion 11 through which a high frequency current flows and a controller portion 12 for controlling the high frequency current flowing through the coil portion 11, which is well known per se. There is something. Then, here, the gauge main body 2 and the handle member 3 are arranged so that the portions which are press-fitted and engaged with each other correspond to the inside of the coil portion 11.

When the controller section 12 is driven in this state and a high-frequency current is passed through the coil section 11, the metal (in this embodiment, the base section of the gauge main body 2) arranged inside the coil section 11 is briefly exposed. Approximately 20 in (usually 1 to 2 seconds)
It is heated to 0 ° C., and the heat at this time melts a part of the handle member 3 in contact with the gauge body 2 in the hole 4.

Next, the high frequency current is stopped and the gauge body 2
When the handle member 3 is taken out, cooled and solidified, the melted portions are fixed to each other and integrated.
Then, when the O-ring 9 is attached to the thus integrated one, the oil gauge 1 shown in FIG. 3 is completed.

Therefore, in the oil gauge 1 thus manufactured, the melted part of the handle portion 3 is brought into close contact with the base portion of the gauge main body 2 in the manufacturing process, and is solidified in this close contact state. As a result, a stronger fixation can be obtained. Further, since the gauge body 2 itself is heated by the electromagnetic induction applied to the gauge body 2 to melt the inside of the hole 4 and does not directly give heat from the outside, the outer surface of the handle member 3 is melted and deformed. There's nothing wrong with it.

In the above embodiment, the base of the gauge main body 2 is formed into a plate shape, and the base is formed into the hole 4 in the state before melting.
It is press-fitted in, but in this case, the structure of Fig. 3 is adopted.
It That is, in the structure shown in FIG. 3 , a cut-and-raised portion 7a is cut and raised in the base portion of the gauge body 2 in an obliquely upper direction opposite to the insertion direction, and a cut-and-raised portion is also cut and raised in an oblique lower direction opposite to the insertion direction. The cut and raised portion 7b,
It has a structure in which it is pressed into the hole 4. In this structure, the handle member 3 melted in the hole 4 flows into the cut-and-raised portions 7a, 7b and the holes after the cut-and-raised portions 7a, 7b are formed, so that a stronger bond can be obtained. become.

[0017]

As described above, according to the present invention,
In the hole into which the base of the gauge body is inserted, a part of the handle member that is in contact with this base is melted, and this melting directly fixes the base and the handle member. Secure fixation is obtained and reliability is improved. Further, since the gauge main body and the handle member can be fixed after they are separately molded, the structure of the mold for molding the handle member and the entire apparatus can be simplified, and the cost can be reduced and the cost can be reduced. Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic configuration layout diagram for explaining a manufacturing process of the present invention.

FIG. 2 is a perspective view of an oil level gauge of the present invention.

FIG. 3 is a diagram showing an essential part of the present invention.

FIG. 4 is a diagram showing an example of a conventional oil level gauge in a use state.

[Explanation of symbols]

1 Oil level gauge 2 Gauge body 3 Handle member 4 Hole 5a Crankcase 5b Guide pipe 6 Oil 7a, 7b Cut and raised part

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Claims (2)

(57) [Claims] 1. A gauge body made of metal, which is inserted into oil in the crankcase through a guide pipe opening in the crankcase, and a gauge body fixedly provided at a base portion of the gauge body and press-fitted into the guide pipe. In a method for manufacturing an oil level gauge including a resin-made handle member, the handle member is provided with a hole into which a base portion of the gauge body is inserted, and the insertion portion is provided at a base portion of the gauge body.
Cut and raised part diagonally upward and opposite to the direction
Also, cut in the diagonally downward direction opposite to the insertion direction.
And a cut and raised portion that is raised , and arranged in the electromagnetic induction device in a state where the base portion is inserted into the hole, by heating the base portion in the hole by electromagnetic induction of the electromagnetic induction device, A method for manufacturing an oil level gauge, characterized in that a part of the contacting handle member is melted to fix and integrate the base portion and the handle member. 2. A gauge body made of metal, which is inserted into oil in the crankcase through a guide pipe opening to the crankcase, and a gauge body fixedly provided at a base portion of the gauge body and press-fitted into the guide pipe. An oil level gauge comprising a resin-made handle member, wherein the handle member and the gauge body are the manufacturing method of claim 1.
An oil level gauge characterized by being fixed .